diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 6f8288d58a..864787cac0 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -30,7 +30,7 @@ func main() {
 
 <!-- Your expectation result of 'curl' command, like -->
 ```
-$ curl http://localhost:8201/hello/world
+$ curl http://localhost:9000/hello/world
 Hello world
 ```
 
@@ -38,7 +38,7 @@ Hello world
 
 <!-- Actual result showing the problem -->
 ```
-$ curl -i http://localhost:8201/hello/world
+$ curl -i http://localhost:9000/hello/world
 <YOUR RESULT>
 ```
 
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index e27022d109..9a4c40d77e 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -7,12 +7,12 @@ name: "CodeQL"
 
 on:
   push:
-    branches: [ master ]
+    branches: [master]
   pull_request:
     # The branches below must be a subset of the branches above
-    branches: [ master ]
+    branches: [master]
   schedule:
-    - cron: '0 17 * * 5'
+    - cron: "0 17 * * 5"
 
 jobs:
   analyze:
@@ -29,15 +29,15 @@ jobs:
         # Override automatic language detection by changing the below list
         # Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
         # TODO: Enable for javascript later
-        language: [ 'go']
+        language: ["go"]
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v2
+        uses: github/codeql-action/init@v3
         with:
           languages: ${{ matrix.language }}
           # If you wish to specify custom queries, you can do so here or in a config file.
@@ -46,4 +46,4 @@ jobs:
           # queries: ./path/to/local/query, your-org/your-repo/queries@main
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v2
+        uses: github/codeql-action/analyze@v3
diff --git a/.github/workflows/gin.yml b/.github/workflows/gin.yml
index fac97d4787..3fe007f16a 100644
--- a/.github/workflows/gin.yml
+++ b/.github/workflows/gin.yml
@@ -15,24 +15,28 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - name: Setup go
-        uses: actions/setup-go@v3
+      - name: Checkout
+        uses: actions/checkout@v4
         with:
-          go-version: '^1.16'
-      - name: Checkout repository
-        uses: actions/checkout@v3
+          fetch-depth: 0
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: "go.mod"
+          check-latest: true
       - name: Setup golangci-lint
-        uses: golangci/golangci-lint-action@v3.4.0
+        uses: golangci/golangci-lint-action@v4
         with:
-          version: v1.48.0
+          version: v1.56.2
           args: --verbose
   test:
     needs: lint
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        go: ['1.16', '1.17', '1.18', '1.19', '1.20']
-        test-tags: ['', '-tags nomsgpack', '-tags "sonic avx"', '-tags go_json']
+        go: ["1.18", "1.19", "1.20", "1.21", "1.22"]
+        test-tags:
+          ["", "-tags nomsgpack", '-tags "sonic avx"', "-tags go_json", "-race"]
         include:
           - os: ubuntu-latest
             go-build: ~/.cache/go-build
@@ -46,16 +50,17 @@ jobs:
       GOPROXY: https://proxy.golang.org
     steps:
       - name: Set up Go ${{ matrix.go }}
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go }}
+          cache: false
 
       - name: Checkout Code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.ref }}
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           path: |
             ${{ matrix.go-build }}
@@ -68,24 +73,10 @@ jobs:
         run: make test
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           flags: ${{ matrix.os }},go-${{ matrix.go }},${{ matrix.test-tags }}
 
       - name: Format
-        if: matrix.go-version == '1.19.x'
+        if: matrix.go-version == '1.22.x'
         run: diff -u <(echo -n) <(gofmt -d .)
-  notification-gitter:
-    needs: test
-    runs-on: ubuntu-latest
-    steps:
-      - name: Notification failure message
-        if: failure()
-        run: |
-          PR_OR_COMPARE="$(if [ "${{ github.event.pull_request }}" != "" ]; then echo "${{ github.event.pull_request.html_url }}"; else echo "${{ github.event.compare }}"; fi)"
-          curl -d message="GitHub Actions [$GITHUB_REPOSITORY]($PR_OR_COMPARE) ($GITHUB_REF) [normal]($GITHUB_API_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID) ($GITHUB_RUN_NUMBER)" -d level=error https://webhooks.gitter.im/e/7f95bf605c4d356372f4
-      - name: Notification success message
-        if: success()
-        run: |
-          PR_OR_COMPARE="$(if [ "${{ github.event.pull_request }}" != "" ]; then echo "${{ github.event.pull_request.html_url }}"; else echo "${{ github.event.compare }}"; fi)"
-          curl -d message="GitHub Actions [$GITHUB_REPOSITORY]($PR_OR_COMPARE) ($GITHUB_REF) [normal]($GITHUB_API_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID) ($GITHUB_RUN_NUMBER)" https://webhooks.gitter.im/e/7f95bf605c4d356372f4
diff --git a/.github/workflows/goreleaser.yml b/.github/workflows/goreleaser.yml
index 3af3a455e1..8ae1182330 100644
--- a/.github/workflows/goreleaser.yml
+++ b/.github/workflows/goreleaser.yml
@@ -3,7 +3,7 @@ name: Goreleaser
 on:
   push:
     tags:
-      - '*'
+      - "*"
 
 permissions:
   contents: write
@@ -12,23 +12,20 @@ jobs:
   goreleaser:
     runs-on: ubuntu-latest
     steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      -
-        name: Set up Go
-        uses: actions/setup-go@v3
+      - name: Set up Go
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.17
-      -
-        name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v4
+          go-version: "^1"
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v5
         with:
           # either 'goreleaser' (default) or 'goreleaser-pro'
           distribution: goreleaser
           version: latest
-          args: release --rm-dist
+          args: release --clean
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.gitignore b/.gitignore
index cf574e0a8c..1ea0e2b950 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,7 @@ count.out
 test
 profile.out
 tmp.out
-.idea
\ No newline at end of file
+
+# Develop tools
+.idea/
+.vscode/
diff --git a/.golangci.yml b/.golangci.yml
index c5e1de388a..4a72f7342f 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -3,7 +3,6 @@ run:
 linters:
   enable:
     - asciicheck
-    - depguard
     - dogsled
     - durationcheck
     - errcheck
@@ -19,6 +18,22 @@ linters:
     - nolintlint
     - revive
     - wastedassign
+
+linters-settings:
+  gosec:
+    # To select a subset of rules to run.
+    # Available rules: https://github.com/securego/gosec#available-rules
+    # Default: [] - means include all rules
+    includes:
+      - G102
+      - G106
+      - G108
+      - G109
+      - G111
+      - G112
+      - G201
+      - G203
+
 issues:
   exclude-rules:
     - linters:
@@ -37,3 +52,6 @@ issues:
     - path: _test\.go
       linters:
         - gosec # security is not make sense in tests
+    - linters:
+        - revive
+      path: _test\.go
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ab5617924..7968520553 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,70 @@
 # Gin ChangeLog
 
+## Gin v1.9.1
+
+### BUG FIXES 
+
+* fix Request.Context() checks [#3512](https://github.com/gin-gonic/gin/pull/3512)
+
+### SECURITY
+
+* fix lack of escaping of filename in Content-Disposition [#3556](https://github.com/gin-gonic/gin/pull/3556) 
+
+### ENHANCEMENTS
+
+* refactor: use bytes.ReplaceAll directly [#3455](https://github.com/gin-gonic/gin/pull/3455)
+* convert strings and slices using the officially recommended way [#3344](https://github.com/gin-gonic/gin/pull/3344)
+* improve render code coverage [#3525](https://github.com/gin-gonic/gin/pull/3525)
+
+### DOCS
+
+* docs: changed documentation link for trusted proxies [#3575](https://github.com/gin-gonic/gin/pull/3575)
+* chore: improve linting, testing, and GitHub Actions setup [#3583](https://github.com/gin-gonic/gin/pull/3583)
+
+## Gin v1.9.0
+
+### BREAK CHANGES
+
+* Stop useless panicking in context and render [#2150](https://github.com/gin-gonic/gin/pull/2150)
+
+### BUG FIXES
+
+* fix(router): tree bug where loop index is not decremented. [#3460](https://github.com/gin-gonic/gin/pull/3460)
+* fix(context): panic on NegotiateFormat - index out of range [#3397](https://github.com/gin-gonic/gin/pull/3397)
+* Add escape logic for header [#3500](https://github.com/gin-gonic/gin/pull/3500) and [#3503](https://github.com/gin-gonic/gin/pull/3503)
+
+### SECURITY
+
+* Fix the GO-2022-0969 and GO-2022-0288 vulnerabilities [#3333](https://github.com/gin-gonic/gin/pull/3333)
+* fix(security): vulnerability GO-2023-1571 [#3505](https://github.com/gin-gonic/gin/pull/3505)
+
+### ENHANCEMENTS
+
+* feat: add sonic json support [#3184](https://github.com/gin-gonic/gin/pull/3184)
+* chore(file): Creates a directory named path [#3316](https://github.com/gin-gonic/gin/pull/3316)
+* fix: modify interface check way [#3327](https://github.com/gin-gonic/gin/pull/3327)
+* remove deprecated of package io/ioutil [#3395](https://github.com/gin-gonic/gin/pull/3395)
+* refactor: avoid calling strings.ToLower twice [#3343](https://github.com/gin-gonic/gin/pull/3433)
+* console logger HTTP status code bug fixed [#3453](https://github.com/gin-gonic/gin/pull/3453)
+* chore(yaml): upgrade dependency to v3 version [#3456](https://github.com/gin-gonic/gin/pull/3456)
+* chore(router): match method added to routergroup for multiple HTTP methods supporting [#3464](https://github.com/gin-gonic/gin/pull/3464)
+* chore(http): add support for go1.20 http.rwUnwrapper to gin.responseWriter [#3489](https://github.com/gin-gonic/gin/pull/3489)
+
+### DOCS
+
+* docs: update markdown format [#3260](https://github.com/gin-gonic/gin/pull/3260)
+* docs(readme): Add the TOML rendering example [#3400](https://github.com/gin-gonic/gin/pull/3400)
+* docs(readme): move more example to docs/doc.md [#3449](https://github.com/gin-gonic/gin/pull/3449)
+* docs: update markdown format [#3446](https://github.com/gin-gonic/gin/pull/3446)
+
 ## Gin v1.8.2
 
-### Bugs
+### BUG FIXES
 
 * fix(route): redirectSlash bug ([#3227]((https://github.com/gin-gonic/gin/pull/3227)))
 * fix(engine): missing route params for CreateTestContext ([#2778]((https://github.com/gin-gonic/gin/pull/2778))) ([#2803]((https://github.com/gin-gonic/gin/pull/2803)))
 
-### Security
+### SECURITY
 
 * Fix the GO-2022-1144 vulnerability ([#3432]((https://github.com/gin-gonic/gin/pull/3432)))
 
@@ -19,12 +76,12 @@
 
 ## Gin v1.8.0
 
-## Break Changes
+### BREAK CHANGES
 
 * TrustedProxies: Add default IPv6 support and refactor [#2967](https://github.com/gin-gonic/gin/pull/2967). Please replace `RemoteIP() (net.IP, bool)` with `RemoteIP() net.IP`
 * gin.Context with fallback value from gin.Context.Request.Context() [#2751](https://github.com/gin-gonic/gin/pull/2751)
 
-### BUGFIXES
+### BUG FIXES
 
 * Fixed SetOutput() panics on go 1.17 [#2861](https://github.com/gin-gonic/gin/pull/2861)
 * Fix: wrong when wildcard follows named param [#2983](https://github.com/gin-gonic/gin/pull/2983)
@@ -61,7 +118,7 @@
 
 ## Gin v1.7.7
 
-### BUGFIXES
+### BUG FIXES
 
 * Fixed X-Forwarded-For unsafe handling of CVE-2020-28483 [#2844](https://github.com/gin-gonic/gin/pull/2844), closed issue [#2862](https://github.com/gin-gonic/gin/issues/2862).
 * Tree: updated the code logic for `latestNode` [#2897](https://github.com/gin-gonic/gin/pull/2897), closed issue [#2894](https://github.com/gin-gonic/gin/issues/2894) [#2878](https://github.com/gin-gonic/gin/issues/2878).
@@ -79,37 +136,37 @@
 
 ## Gin v1.7.6
 
-### BUGFIXES
+### BUG FIXES
 
 * bump new release to fix v1.7.5 release error by using v1.7.4 codes.
 
 ## Gin v1.7.4
 
-### BUGFIXES
+### BUG FIXES
 
 * bump new release to fix checksum mismatch
 
 ## Gin v1.7.3
 
-### BUGFIXES
+### BUG FIXES
 
 * fix level 1 router match [#2767](https://github.com/gin-gonic/gin/issues/2767), [#2796](https://github.com/gin-gonic/gin/issues/2796)
 
 ## Gin v1.7.2
 
-### BUGFIXES
+### BUG FIXES
 
 * Fix conflict between param and exact path [#2706](https://github.com/gin-gonic/gin/issues/2706). Close issue [#2682](https://github.com/gin-gonic/gin/issues/2682) [#2696](https://github.com/gin-gonic/gin/issues/2696).
 
 ## Gin v1.7.1
 
-### BUGFIXES
+### BUG FIXES
 
 * fix: data race with trustedCIDRs from [#2674](https://github.com/gin-gonic/gin/issues/2674)([#2675](https://github.com/gin-gonic/gin/pull/2675))
 
 ## Gin v1.7.0
 
-### BUGFIXES
+### BUG FIXES
 
 * fix compile error from [#2572](https://github.com/gin-gonic/gin/pull/2572) ([#2600](https://github.com/gin-gonic/gin/pull/2600))
 * fix: print headers without Authorization header on broken pipe ([#2528](https://github.com/gin-gonic/gin/pull/2528))
@@ -148,33 +205,44 @@
 
 ## Gin v1.6.2
 
-### BUGFIXES
+### BUG FIXES
+
   * fix missing initial sync.RWMutex [#2305](https://github.com/gin-gonic/gin/pull/2305)
+
 ### ENHANCEMENTS
+
   * Add set samesite in cookie. [#2306](https://github.com/gin-gonic/gin/pull/2306)
 
 ## Gin v1.6.1
 
-### BUGFIXES
+### BUG FIXES
+
   * Revert "fix accept incoming network connections" [#2294](https://github.com/gin-gonic/gin/pull/2294)
 
 ## Gin v1.6.0
 
 ### BREAKING
+
   * chore(performance): Improve performance for adding RemoveExtraSlash flag [#2159](https://github.com/gin-gonic/gin/pull/2159)
   * drop support govendor [#2148](https://github.com/gin-gonic/gin/pull/2148)
   * Added support for SameSite cookie flag [#1615](https://github.com/gin-gonic/gin/pull/1615)
+
 ### FEATURES
+
   * add yaml negotiation [#2220](https://github.com/gin-gonic/gin/pull/2220)
   * FileFromFS [#2112](https://github.com/gin-gonic/gin/pull/2112)
-### BUGFIXES
+
+### BUG FIXES
+
   * Unix Socket Handling [#2280](https://github.com/gin-gonic/gin/pull/2280)
   * Use json marshall in context json to fix breaking new line issue. Fixes #2209 [#2228](https://github.com/gin-gonic/gin/pull/2228)
   * fix accept incoming network connections [#2216](https://github.com/gin-gonic/gin/pull/2216)
   * Fixed a bug in the calculation of the maximum number of parameters [#2166](https://github.com/gin-gonic/gin/pull/2166)
   * [FIX] allow empty headers on DataFromReader [#2121](https://github.com/gin-gonic/gin/pull/2121)
   * Add mutex for protect Context.Keys map [#1391](https://github.com/gin-gonic/gin/pull/1391)
+
 ### ENHANCEMENTS
+
   * Add mitigation for log injection [#2277](https://github.com/gin-gonic/gin/pull/2277)
   * tree: range over nodes values [#2229](https://github.com/gin-gonic/gin/pull/2229)
   * tree: remove duplicate assignment [#2222](https://github.com/gin-gonic/gin/pull/2222)
@@ -189,7 +257,9 @@
   * upgrade go-validator to v10 [#2149](https://github.com/gin-gonic/gin/pull/2149)
   * Refactor redirect request in gin.go [#1970](https://github.com/gin-gonic/gin/pull/1970)
   * Add build tag nomsgpack [#1852](https://github.com/gin-gonic/gin/pull/1852)
+
 ### DOCS
+
   * docs(path): improve comments [#2223](https://github.com/gin-gonic/gin/pull/2223)
   * Renew README to fit the modification of SetCookie method [#2217](https://github.com/gin-gonic/gin/pull/2217)
   * Fix spelling [#2202](https://github.com/gin-gonic/gin/pull/2202)
@@ -202,7 +272,9 @@
   * Add project to README [#2165](https://github.com/gin-gonic/gin/pull/2165)
   * docs(benchmarks): for gin v1.5 [#2153](https://github.com/gin-gonic/gin/pull/2153)
   * Changed wording for clarity in README.md [#2122](https://github.com/gin-gonic/gin/pull/2122)
+
 ### MISC
+
   * ci support go1.14 [#2262](https://github.com/gin-gonic/gin/pull/2262)
   * chore: upgrade depend version [#2231](https://github.com/gin-gonic/gin/pull/2231)
   * Drop support go1.10 [#2147](https://github.com/gin-gonic/gin/pull/2147)
diff --git a/README.md b/README.md
index 336155a990..e007bf2fbb 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,6 @@
 [![codecov](https://codecov.io/gh/gin-gonic/gin/branch/master/graph/badge.svg)](https://codecov.io/gh/gin-gonic/gin)
 [![Go Report Card](https://goreportcard.com/badge/github.com/gin-gonic/gin)](https://goreportcard.com/report/github.com/gin-gonic/gin)
 [![GoDoc](https://pkg.go.dev/badge/github.com/gin-gonic/gin?status.svg)](https://pkg.go.dev/github.com/gin-gonic/gin?tab=doc)
-[![Join the chat at https://gitter.im/gin-gonic/gin](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/gin-gonic/gin?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Sourcegraph](https://sourcegraph.com/github.com/gin-gonic/gin/-/badge.svg)](https://sourcegraph.com/github.com/gin-gonic/gin?badge)
 [![Open Source Helpers](https://www.codetriage.com/gin-gonic/gin/badges/users.svg)](https://www.codetriage.com/gin-gonic/gin)
 [![Release](https://img.shields.io/github/release/gin-gonic/gin.svg?style=flat-square)](https://github.com/gin-gonic/gin/releases)
@@ -31,7 +30,7 @@ Gin is a web framework written in [Go](https://go.dev/). It features a martini-l
 
 ### Prerequisites
 
-- **[Go](https://go.dev/)**: ~~any one of the **three latest major** [releases](https://go.dev/doc/devel/release)~~ (now version **1.16+** is required).
+- **[Go](https://go.dev/)**: any one of the **three latest major** [releases](https://go.dev/doc/devel/release) (we test it with these).
 
 ### Getting Gin
 
@@ -176,4 +175,4 @@ Awesome project lists using [Gin](https://github.com/gin-gonic/gin) web framewor
 
 Gin is the work of hundreds of contributors. We appreciate your help!
 
-Please see [CONTRIBUTING](CONTRIBUTING.md) for details on submitting patches and the contribution workflow.
\ No newline at end of file
+Please see [CONTRIBUTING](CONTRIBUTING.md) for details on submitting patches and the contribution workflow.
diff --git a/any.go b/any.go
deleted file mode 100644
index 42b1ea46f7..0000000000
--- a/any.go
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright 2022 Gin Core Team. All rights reserved.
-// Use of this source code is governed by a MIT style
-// license that can be found in the LICENSE file.
-
-//go:build !go1.18
-// +build !go1.18
-
-package gin
-
-type any = interface{}
diff --git a/auth.go b/auth.go
index 2503c5156a..5d3222d566 100644
--- a/auth.go
+++ b/auth.go
@@ -16,6 +16,9 @@ import (
 // AuthUserKey is the cookie name for user credential in basic auth.
 const AuthUserKey = "user"
 
+// AuthProxyUserKey is the cookie name for proxy_user credential in basic auth for proxy.
+const AuthProxyUserKey = "proxy_user"
+
 // Accounts defines a key/value for user/pass list of authorized logins.
 type Accounts map[string]string
 
@@ -89,3 +92,25 @@ func authorizationHeader(user, password string) string {
 	base := user + ":" + password
 	return "Basic " + base64.StdEncoding.EncodeToString(bytesconv.StringToBytes(base))
 }
+
+// BasicAuthForProxy returns a Basic HTTP Proxy-Authorization middleware.
+// If the realm is empty, "Proxy Authorization Required" will be used by default.
+func BasicAuthForProxy(accounts Accounts, realm string) HandlerFunc {
+	if realm == "" {
+		realm = "Proxy Authorization Required"
+	}
+	realm = "Basic realm=" + strconv.Quote(realm)
+	pairs := processAccounts(accounts)
+	return func(c *Context) {
+		proxyUser, found := pairs.searchCredential(c.requestHeader("Proxy-Authorization"))
+		if !found {
+			// Credentials doesn't match, we return 407 and abort handlers chain.
+			c.Header("Proxy-Authenticate", realm)
+			c.AbortWithStatus(http.StatusProxyAuthRequired)
+			return
+		}
+		// The proxy_user credentials was found, set proxy_user's id to key AuthProxyUserKey in this context, the proxy_user's id can be read later using
+		// c.MustGet(gin.AuthProxyUserKey).
+		c.Set(AuthProxyUserKey, proxyUser)
+	}
+}
diff --git a/auth_test.go b/auth_test.go
index 42b6f8fddf..f7175929b4 100644
--- a/auth_test.go
+++ b/auth_test.go
@@ -137,3 +137,40 @@ func TestBasicAuth401WithCustomRealm(t *testing.T) {
 	assert.Equal(t, http.StatusUnauthorized, w.Code)
 	assert.Equal(t, "Basic realm=\"My Custom \\\"Realm\\\"\"", w.Header().Get("WWW-Authenticate"))
 }
+
+func TestBasicAuthForProxySucceed(t *testing.T) {
+	accounts := Accounts{"admin": "password"}
+	router := New()
+	router.Use(BasicAuthForProxy(accounts, ""))
+	router.Any("/*proxyPath", func(c *Context) {
+		c.String(http.StatusOK, c.MustGet(AuthProxyUserKey).(string))
+	})
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("GET", "/test", nil)
+	req.Header.Set("Proxy-Authorization", authorizationHeader("admin", "password"))
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Equal(t, "admin", w.Body.String())
+}
+
+func TestBasicAuthForProxy407(t *testing.T) {
+	called := false
+	accounts := Accounts{"foo": "bar"}
+	router := New()
+	router.Use(BasicAuthForProxy(accounts, ""))
+	router.Any("/*proxyPath", func(c *Context) {
+		called = true
+		c.String(http.StatusOK, c.MustGet(AuthProxyUserKey).(string))
+	})
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("GET", "/test", nil)
+	req.Header.Set("Proxy-Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte("admin:password")))
+	router.ServeHTTP(w, req)
+
+	assert.False(t, called)
+	assert.Equal(t, http.StatusProxyAuthRequired, w.Code)
+	assert.Equal(t, "Basic realm=\"Proxy Authorization Required\"", w.Header().Get("Proxy-Authenticate"))
+}
diff --git a/binding/any.go b/binding/any.go
deleted file mode 100644
index d8251a7c20..0000000000
--- a/binding/any.go
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright 2022 Gin Core Team. All rights reserved.
-// Use of this source code is governed by a MIT style
-// license that can be found in the LICENSE file.
-
-//go:build !go1.18
-// +build !go1.18
-
-package binding
-
-type any = interface{}
diff --git a/binding/binding.go b/binding/binding.go
index 3846d170aa..bcf8b06a79 100644
--- a/binding/binding.go
+++ b/binding/binding.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !nomsgpack
-// +build !nomsgpack
 
 package binding
 
@@ -22,6 +21,7 @@ const (
 	MIMEMSGPACK           = "application/x-msgpack"
 	MIMEMSGPACK2          = "application/msgpack"
 	MIMEYAML              = "application/x-yaml"
+	MIMEYAML2             = "application/yaml"
 	MIMETOML              = "application/toml"
 )
 
@@ -104,7 +104,7 @@ func Default(method, contentType string) Binding {
 		return ProtoBuf
 	case MIMEMSGPACK, MIMEMSGPACK2:
 		return MsgPack
-	case MIMEYAML:
+	case MIMEYAML, MIMEYAML2:
 		return YAML
 	case MIMETOML:
 		return TOML
diff --git a/binding/binding_msgpack_test.go b/binding/binding_msgpack_test.go
index 04d9407971..a6cd6aa83d 100644
--- a/binding/binding_msgpack_test.go
+++ b/binding/binding_msgpack_test.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !nomsgpack
-// +build !nomsgpack
 
 package binding
 
diff --git a/binding/binding_nomsgpack.go b/binding/binding_nomsgpack.go
index 7f6a904ab0..552a86b2d7 100644
--- a/binding/binding_nomsgpack.go
+++ b/binding/binding_nomsgpack.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build nomsgpack
-// +build nomsgpack
 
 package binding
 
@@ -20,6 +19,7 @@ const (
 	MIMEMultipartPOSTForm = "multipart/form-data"
 	MIMEPROTOBUF          = "application/x-protobuf"
 	MIMEYAML              = "application/x-yaml"
+	MIMEYAML2             = "application/yaml"
 	MIMETOML              = "application/toml"
 )
 
@@ -97,7 +97,7 @@ func Default(method, contentType string) Binding {
 		return XML
 	case MIMEPROTOBUF:
 		return ProtoBuf
-	case MIMEYAML:
+	case MIMEYAML, MIMEYAML2:
 		return YAML
 	case MIMEMultipartPOSTForm:
 		return FormMultipart
diff --git a/binding/binding_test.go b/binding/binding_test.go
index 9af4f88aa3..feb8eed558 100644
--- a/binding/binding_test.go
+++ b/binding/binding_test.go
@@ -164,6 +164,8 @@ func TestBindingDefault(t *testing.T) {
 
 	assert.Equal(t, YAML, Default("POST", MIMEYAML))
 	assert.Equal(t, YAML, Default("PUT", MIMEYAML))
+	assert.Equal(t, YAML, Default("POST", MIMEYAML2))
+	assert.Equal(t, YAML, Default("PUT", MIMEYAML2))
 
 	assert.Equal(t, TOML, Default("POST", MIMETOML))
 	assert.Equal(t, TOML, Default("PUT", MIMETOML))
diff --git a/binding/default_validator.go b/binding/default_validator.go
index e216b8546c..ac43d7cc5e 100644
--- a/binding/default_validator.go
+++ b/binding/default_validator.go
@@ -54,7 +54,10 @@ func (v *defaultValidator) ValidateStruct(obj any) error {
 	value := reflect.ValueOf(obj)
 	switch value.Kind() {
 	case reflect.Ptr:
-		return v.ValidateStruct(value.Elem().Interface())
+		if value.Elem().Kind() != reflect.Struct {
+			return v.ValidateStruct(value.Elem().Interface())
+		}
+		return v.validateStruct(obj)
 	case reflect.Struct:
 		return v.validateStruct(obj)
 	case reflect.Slice, reflect.Array:
diff --git a/binding/form_mapping.go b/binding/form_mapping.go
index 540bbbb84a..77a1bde697 100644
--- a/binding/form_mapping.go
+++ b/binding/form_mapping.go
@@ -7,6 +7,7 @@ package binding
 import (
 	"errors"
 	"fmt"
+	"mime/multipart"
 	"reflect"
 	"strconv"
 	"strings"
@@ -235,10 +236,17 @@ func setWithProperType(val string, value reflect.Value, field reflect.StructFiel
 		switch value.Interface().(type) {
 		case time.Time:
 			return setTimeField(val, field, value)
+		case multipart.FileHeader:
+			return nil
 		}
 		return json.Unmarshal(bytesconv.StringToBytes(val), value.Addr().Interface())
 	case reflect.Map:
 		return json.Unmarshal(bytesconv.StringToBytes(val), value.Addr().Interface())
+	case reflect.Ptr:
+		if !value.Elem().IsValid() {
+			value.Set(reflect.New(value.Type().Elem()))
+		}
+		return setWithProperType(val, value.Elem(), field)
 	default:
 		return errUnknownType
 	}
diff --git a/binding/form_mapping_test.go b/binding/form_mapping_test.go
index 93d6a92ff8..16527eb916 100644
--- a/binding/form_mapping_test.go
+++ b/binding/form_mapping_test.go
@@ -5,6 +5,7 @@
 package binding
 
 import (
+	"mime/multipart"
 	"reflect"
 	"testing"
 	"time"
@@ -43,6 +44,7 @@ func TestMappingBaseTypes(t *testing.T) {
 		{"zero value", struct{ F uint }{}, "", uint(0)},
 		{"zero value", struct{ F bool }{}, "", false},
 		{"zero value", struct{ F float32 }{}, "", float32(0)},
+		{"file value", struct{ F *multipart.FileHeader }{}, "", &multipart.FileHeader{}},
 	} {
 		tp := reflect.TypeOf(tt.value)
 		testName := tt.name + ":" + tp.Field(0).Type.String()
@@ -269,6 +271,39 @@ func TestMappingStructField(t *testing.T) {
 	assert.Equal(t, 9, s.J.I)
 }
 
+func TestMappingPtrField(t *testing.T) {
+	type ptrStruct struct {
+		Key int64 `json:"key"`
+	}
+
+	type ptrRequest struct {
+		Items []*ptrStruct `json:"items" form:"items"`
+	}
+
+	var err error
+
+	// With 0 items.
+	var req0 ptrRequest
+	err = mappingByPtr(&req0, formSource{}, "form")
+	assert.NoError(t, err)
+	assert.Empty(t, req0.Items)
+
+	// With 1 item.
+	var req1 ptrRequest
+	err = mappingByPtr(&req1, formSource{"items": {`{"key": 1}`}}, "form")
+	assert.NoError(t, err)
+	assert.Len(t, req1.Items, 1)
+	assert.EqualValues(t, 1, req1.Items[0].Key)
+
+	// With 2 items.
+	var req2 ptrRequest
+	err = mappingByPtr(&req2, formSource{"items": {`{"key": 1}`, `{"key": 2}`}}, "form")
+	assert.NoError(t, err)
+	assert.Len(t, req2.Items, 2)
+	assert.EqualValues(t, 1, req2.Items[0].Key)
+	assert.EqualValues(t, 2, req2.Items[1].Key)
+}
+
 func TestMappingMapField(t *testing.T) {
 	var s struct {
 		M map[string]int
diff --git a/binding/json.go b/binding/json.go
index 36eb27a344..e21c2ee346 100644
--- a/binding/json.go
+++ b/binding/json.go
@@ -15,7 +15,7 @@ import (
 
 // EnableDecoderUseNumber is used to call the UseNumber method on the JSON
 // Decoder instance. UseNumber causes the Decoder to unmarshal a number into an
-// interface{} as a Number instead of as a float64.
+// any as a Number instead of as a float64.
 var EnableDecoderUseNumber = false
 
 // EnableDecoderDisallowUnknownFields is used to call the DisallowUnknownFields method
diff --git a/binding/msgpack.go b/binding/msgpack.go
index d1f035e44a..22de9b5515 100644
--- a/binding/msgpack.go
+++ b/binding/msgpack.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !nomsgpack
-// +build !nomsgpack
 
 package binding
 
diff --git a/binding/msgpack_test.go b/binding/msgpack_test.go
index 11561c843d..df386a6d56 100644
--- a/binding/msgpack_test.go
+++ b/binding/msgpack_test.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !nomsgpack
-// +build !nomsgpack
 
 package binding
 
diff --git a/binding/query.go b/binding/query.go
index c958b88bda..baa4aead4f 100644
--- a/binding/query.go
+++ b/binding/query.go
@@ -12,9 +12,9 @@ func (queryBinding) Name() string {
 	return "query"
 }
 
-func (queryBinding) Bind(req *http.Request, obj any) error {
+func (q queryBinding) Bind(req *http.Request, obj any) error {
 	values := req.URL.Query()
-	if err := mapForm(obj, values); err != nil {
+	if err := mapFormByTag(obj, values, q.Name()); err != nil {
 		return err
 	}
 	return validate(obj)
diff --git a/binding/query_test.go b/binding/query_test.go
new file mode 100644
index 0000000000..72102040ea
--- /dev/null
+++ b/binding/query_test.go
@@ -0,0 +1,23 @@
+package binding
+
+import (
+	"net/http"
+	"net/url"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestQueryBinding(t *testing.T) {
+	var s struct {
+		Foo string `query:"foo"`
+	}
+
+	request := &http.Request{URL: &url.URL{RawQuery: "foo=BAR"}}
+
+	err := queryBinding{}.Bind(request, &s)
+	require.NoError(t, err)
+
+	assert.Equal(t, "BAR", s.Foo)
+}
diff --git a/binding/validate_test.go b/binding/validate_test.go
index 801bd9b7c5..1fc15ff079 100644
--- a/binding/validate_test.go
+++ b/binding/validate_test.go
@@ -192,6 +192,30 @@ func TestValidatePrimitives(t *testing.T) {
 	assert.Equal(t, "value", str)
 }
 
+type structModifyValidation struct {
+	Integer int
+}
+
+func toZero(sl validator.StructLevel) {
+	var s *structModifyValidation = sl.Top().Interface().(*structModifyValidation)
+	s.Integer = 0
+}
+
+func TestValidateAndModifyStruct(t *testing.T) {
+	// This validates that pointers to structs are passed to the validator
+	// giving us the ability to modify the struct being validated.
+	engine, ok := Validator.Engine().(*validator.Validate)
+	assert.True(t, ok)
+
+	engine.RegisterStructValidation(toZero, structModifyValidation{})
+
+	s := structModifyValidation{Integer: 1}
+	errs := validate(&s)
+
+	assert.Nil(t, errs)
+	assert.Equal(t, s, structModifyValidation{Integer: 0})
+}
+
 // structCustomValidation is a helper struct we use to check that
 // custom validation can be registered on it.
 // The `notone` binding directive is for custom validation and registered later.
diff --git a/codecov.yml b/codecov.yml
index c9c9a522da..47782e50d6 100644
--- a/codecov.yml
+++ b/codecov.yml
@@ -1,5 +1,13 @@
 coverage:
-  notify:
-    gitter:
+  require_ci_to_pass: true
+
+  status:
+    project:
       default:
-        url: https://webhooks.gitter.im/e/d90dcdeeab2f1e357165
+        target: 99%
+        threshold: 99%
+
+    patch:
+      default:
+        target: 99%
+        threshold: 95%
\ No newline at end of file
diff --git a/context.go b/context.go
index 435473c739..8156f2acc1 100644
--- a/context.go
+++ b/context.go
@@ -43,6 +43,10 @@ const BodyBytesKey = "_gin-gonic/gin/bodybyteskey"
 // ContextKey is the key that a Context returns itself for.
 const ContextKey = "_gin-gonic/gin/contextkey"
 
+type ContextKeyType int
+
+const ContextRequestKey ContextKeyType = 0
+
 // abortIndex represents a typical value used in abort functions.
 const abortIndex int8 = math.MaxInt8 >> 1
 
@@ -113,20 +117,27 @@ func (c *Context) Copy() *Context {
 	cp := Context{
 		writermem: c.writermem,
 		Request:   c.Request,
-		Params:    c.Params,
 		engine:    c.engine,
 	}
+
 	cp.writermem.ResponseWriter = nil
 	cp.Writer = &cp.writermem
 	cp.index = abortIndex
 	cp.handlers = nil
-	cp.Keys = map[string]any{}
-	for k, v := range c.Keys {
+	cp.fullPath = c.fullPath
+
+	cKeys := c.Keys
+	cp.Keys = make(map[string]any, len(cKeys))
+	c.mu.RLock()
+	for k, v := range cKeys {
 		cp.Keys[k] = v
 	}
-	paramCopy := make([]Param, len(cp.Params))
-	copy(paramCopy, cp.Params)
-	cp.Params = paramCopy
+	c.mu.RUnlock()
+
+	cParams := c.Params
+	cp.Params = make([]Param, len(cParams))
+	copy(cp.Params, cParams)
+
 	return &cp
 }
 
@@ -386,7 +397,7 @@ func (c *Context) GetStringMapStringSlice(key string) (smss map[string][]string)
 //
 //	router.GET("/user/:id", func(c *gin.Context) {
 //	    // a GET request to /user/john
-//	    id := c.Param("id") // id == "/john"
+//	    id := c.Param("id") // id == "john"
 //	    // a GET request to /user/john/
 //	    id := c.Param("id") // id == "/john/"
 //	})
@@ -652,7 +663,7 @@ func (c *Context) BindYAML(obj any) error {
 }
 
 // BindTOML is a shortcut for c.MustBindWith(obj, binding.TOML).
-func (c *Context) BindTOML(obj interface{}) error {
+func (c *Context) BindTOML(obj any) error {
 	return c.MustBindWith(obj, binding.TOML)
 }
 
@@ -717,7 +728,7 @@ func (c *Context) ShouldBindYAML(obj any) error {
 }
 
 // ShouldBindTOML is a shortcut for c.ShouldBindWith(obj, binding.TOML).
-func (c *Context) ShouldBindTOML(obj interface{}) error {
+func (c *Context) ShouldBindTOML(obj any) error {
 	return c.ShouldBindWith(obj, binding.TOML)
 }
 
@@ -878,6 +889,9 @@ func (c *Context) GetHeader(key string) string {
 
 // GetRawData returns stream data.
 func (c *Context) GetRawData() ([]byte, error) {
+	if c.Request.Body == nil {
+		return nil, errors.New("cannot read nil body")
+	}
 	return io.ReadAll(c.Request.Body)
 }
 
@@ -1000,7 +1014,7 @@ func (c *Context) YAML(code int, obj any) {
 }
 
 // TOML serializes the given struct as TOML into the response body.
-func (c *Context) TOML(code int, obj interface{}) {
+func (c *Context) TOML(code int, obj any) {
 	c.Render(code, render.TOML{Data: obj})
 }
 
@@ -1057,11 +1071,17 @@ func (c *Context) FileFromFS(filepath string, fs http.FileSystem) {
 	http.FileServer(fs).ServeHTTP(c.Writer, c.Request)
 }
 
+var quoteEscaper = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
+
+func escapeQuotes(s string) string {
+	return quoteEscaper.Replace(s)
+}
+
 // FileAttachment writes the specified file into the body stream in an efficient way
 // On the client side, the file will typically be downloaded with the given filename
 func (c *Context) FileAttachment(filepath, filename string) {
 	if isASCII(filename) {
-		c.Writer.Header().Set("Content-Disposition", `attachment; filename="`+filename+`"`)
+		c.Writer.Header().Set("Content-Disposition", `attachment; filename="`+escapeQuotes(filename)+`"`)
 	} else {
 		c.Writer.Header().Set("Content-Disposition", `attachment; filename*=UTF-8''`+url.QueryEscape(filename))
 	}
@@ -1179,9 +1199,16 @@ func (c *Context) SetAccepted(formats ...string) {
 /***** GOLANG.ORG/X/NET/CONTEXT *****/
 /************************************/
 
+// hasRequestContext returns whether c.Request has Context and fallback.
+func (c *Context) hasRequestContext() bool {
+	hasFallback := c.engine != nil && c.engine.ContextWithFallback
+	hasRequestContext := c.Request != nil && c.Request.Context() != nil
+	return hasFallback && hasRequestContext
+}
+
 // Deadline returns that there is no deadline (ok==false) when c.Request has no Context.
 func (c *Context) Deadline() (deadline time.Time, ok bool) {
-	if !c.engine.ContextWithFallback || c.Request == nil || c.Request.Context() == nil {
+	if !c.hasRequestContext() {
 		return
 	}
 	return c.Request.Context().Deadline()
@@ -1189,7 +1216,7 @@ func (c *Context) Deadline() (deadline time.Time, ok bool) {
 
 // Done returns nil (chan which will wait forever) when c.Request has no Context.
 func (c *Context) Done() <-chan struct{} {
-	if !c.engine.ContextWithFallback || c.Request == nil || c.Request.Context() == nil {
+	if !c.hasRequestContext() {
 		return nil
 	}
 	return c.Request.Context().Done()
@@ -1197,7 +1224,7 @@ func (c *Context) Done() <-chan struct{} {
 
 // Err returns nil when c.Request has no Context.
 func (c *Context) Err() error {
-	if !c.engine.ContextWithFallback || c.Request == nil || c.Request.Context() == nil {
+	if !c.hasRequestContext() {
 		return nil
 	}
 	return c.Request.Context().Err()
@@ -1207,7 +1234,7 @@ func (c *Context) Err() error {
 // if no value is associated with key. Successive calls to Value with
 // the same key returns the same result.
 func (c *Context) Value(key any) any {
-	if key == 0 {
+	if key == ContextRequestKey {
 		return c.Request
 	}
 	if key == ContextKey {
@@ -1218,7 +1245,7 @@ func (c *Context) Value(key any) any {
 			return val
 		}
 	}
-	if !c.engine.ContextWithFallback || c.Request == nil || c.Request.Context() == nil {
+	if !c.hasRequestContext() {
 		return nil
 	}
 	return c.Request.Context().Value(key)
diff --git a/context_1.17_test.go b/context_1.17_test.go
deleted file mode 100644
index 0f8527fe09..0000000000
--- a/context_1.17_test.go
+++ /dev/null
@@ -1,94 +0,0 @@
-// Copyright 2021 Gin Core Team. All rights reserved.
-// Use of this source code is governed by a MIT style
-// license that can be found in the LICENSE file.
-
-//go:build go1.17
-// +build go1.17
-
-package gin
-
-import (
-	"bytes"
-	"mime/multipart"
-	"net/http"
-	"net/http/httptest"
-	"runtime"
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-type interceptedWriter struct {
-	ResponseWriter
-	b *bytes.Buffer
-}
-
-func (i interceptedWriter) WriteHeader(code int) {
-	i.Header().Del("X-Test")
-	i.ResponseWriter.WriteHeader(code)
-}
-
-func TestContextFormFileFailed17(t *testing.T) {
-	if !isGo117OrGo118() {
-		return
-	}
-	buf := new(bytes.Buffer)
-	mw := multipart.NewWriter(buf)
-	defer func(mw *multipart.Writer) {
-		err := mw.Close()
-		if err != nil {
-			assert.Error(t, err)
-		}
-	}(mw)
-	c, _ := CreateTestContext(httptest.NewRecorder())
-	c.Request, _ = http.NewRequest("POST", "/", nil)
-	c.Request.Header.Set("Content-Type", mw.FormDataContentType())
-	c.engine.MaxMultipartMemory = 8 << 20
-	assert.Panics(t, func() {
-		f, err := c.FormFile("file")
-		assert.Error(t, err)
-		assert.Nil(t, f)
-	})
-}
-
-func TestInterceptedHeader(t *testing.T) {
-	w := httptest.NewRecorder()
-	c, r := CreateTestContext(w)
-
-	r.Use(func(c *Context) {
-		i := interceptedWriter{
-			ResponseWriter: c.Writer,
-			b:              bytes.NewBuffer(nil),
-		}
-		c.Writer = i
-		c.Next()
-		c.Header("X-Test", "overridden")
-		c.Writer = i.ResponseWriter
-	})
-	r.GET("/", func(c *Context) {
-		c.Header("X-Test", "original")
-		c.Header("X-Test-2", "present")
-		c.String(http.StatusOK, "hello world")
-	})
-	c.Request = httptest.NewRequest("GET", "/", nil)
-	r.HandleContext(c)
-	// Result() has headers frozen when WriteHeaderNow() has been called
-	// Compared to this time, this is when the response headers will be flushed
-	// As response is flushed on c.String, the Header cannot be set by the first
-	// middleware. Assert this
-	assert.Equal(t, "", w.Result().Header.Get("X-Test"))
-	assert.Equal(t, "present", w.Result().Header.Get("X-Test-2"))
-}
-
-func isGo117OrGo118() bool {
-	version := strings.Split(runtime.Version()[2:], ".")
-	if len(version) >= 2 {
-		x := version[0]
-		y := version[1]
-		if x == "1" && (y == "17" || y == "18") {
-			return true
-		}
-	}
-	return false
-}
diff --git a/context_1.16_test.go b/context_1.18_test.go
similarity index 66%
rename from context_1.16_test.go
rename to context_1.18_test.go
index 267605072e..6118beaa49 100644
--- a/context_1.16_test.go
+++ b/context_1.18_test.go
@@ -2,8 +2,7 @@
 // Use of this source code is governed by a MIT style
 // license that can be found in the LICENSE file.
 
-//go:build !go1.17
-// +build !go1.17
+//go:build !go1.19
 
 package gin
 
@@ -17,15 +16,22 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestContextFormFileFailed16(t *testing.T) {
+func TestContextFormFileFailed18(t *testing.T) {
 	buf := new(bytes.Buffer)
 	mw := multipart.NewWriter(buf)
-	mw.Close()
+	defer func(mw *multipart.Writer) {
+		err := mw.Close()
+		if err != nil {
+			assert.Error(t, err)
+		}
+	}(mw)
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	c.Request, _ = http.NewRequest("POST", "/", nil)
 	c.Request.Header.Set("Content-Type", mw.FormDataContentType())
 	c.engine.MaxMultipartMemory = 8 << 20
-	f, err := c.FormFile("file")
-	assert.Error(t, err)
-	assert.Nil(t, f)
+	assert.Panics(t, func() {
+		f, err := c.FormFile("file")
+		assert.Error(t, err)
+		assert.Nil(t, f)
+	})
 }
diff --git a/context_1.19_test.go b/context_1.19_test.go
index 4b34ea2472..dd75325b18 100644
--- a/context_1.19_test.go
+++ b/context_1.19_test.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build go1.19
-// +build go1.19
 
 package gin
 
diff --git a/context_appengine.go b/context_appengine.go
index 931313f613..96b339c488 100644
--- a/context_appengine.go
+++ b/context_appengine.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build appengine
-// +build appengine
 
 package gin
 
diff --git a/context_test.go b/context_test.go
index 2e10deaecc..794fee329d 100644
--- a/context_test.go
+++ b/context_test.go
@@ -37,7 +37,7 @@ var errTestRender = errors.New("TestRender")
 // Unit tests TODO
 // func (c *Context) File(filepath string) {
 // func (c *Context) Negotiate(code int, config Negotiate) {
-// BAD case: func (c *Context) Render(code int, render render.Render, obj ...interface{}) {
+// BAD case: func (c *Context) Render(code int, render render.Render, obj ...any) {
 // test that information is not leaked when reusing Contexts (using the Pool)
 
 func createMultipartRequest() *http.Request {
@@ -324,6 +324,7 @@ func TestContextCopy(t *testing.T) {
 	c.handlers = HandlersChain{func(c *Context) {}}
 	c.Params = Params{Param{Key: "foo", Value: "bar"}}
 	c.Set("foo", "bar")
+	c.fullPath = "/hola"
 
 	cp := c.Copy()
 	assert.Nil(t, cp.handlers)
@@ -336,6 +337,7 @@ func TestContextCopy(t *testing.T) {
 	assert.Equal(t, cp.Params, c.Params)
 	cp.Set("foo", "notBar")
 	assert.False(t, cp.Keys["foo"] == c.Keys["foo"])
+	assert.Equal(t, cp.fullPath, c.fullPath)
 }
 
 func TestContextHandlerName(t *testing.T) {
@@ -998,7 +1000,7 @@ func TestContextRenderFile(t *testing.T) {
 	c.File("./gin.go")
 
 	assert.Equal(t, http.StatusOK, w.Code)
-	assert.Contains(t, w.Body.String(), "func New() *Engine {")
+	assert.Contains(t, w.Body.String(), "func New(opts ...OptionFunc) *Engine {")
 	// Content-Type='text/plain; charset=utf-8' when go version <= 1.16,
 	// else, Content-Type='text/x-go; charset=utf-8'
 	assert.NotEqual(t, "", w.Header().Get("Content-Type"))
@@ -1012,7 +1014,7 @@ func TestContextRenderFileFromFS(t *testing.T) {
 	c.FileFromFS("./gin.go", Dir(".", false))
 
 	assert.Equal(t, http.StatusOK, w.Code)
-	assert.Contains(t, w.Body.String(), "func New() *Engine {")
+	assert.Contains(t, w.Body.String(), "func New(opts ...OptionFunc) *Engine {")
 	// Content-Type='text/plain; charset=utf-8' when go version <= 1.16,
 	// else, Content-Type='text/x-go; charset=utf-8'
 	assert.NotEqual(t, "", w.Header().Get("Content-Type"))
@@ -1028,10 +1030,24 @@ func TestContextRenderAttachment(t *testing.T) {
 	c.FileAttachment("./gin.go", newFilename)
 
 	assert.Equal(t, 200, w.Code)
-	assert.Contains(t, w.Body.String(), "func New() *Engine {")
+	assert.Contains(t, w.Body.String(), "func New(opts ...OptionFunc) *Engine {")
 	assert.Equal(t, fmt.Sprintf("attachment; filename=\"%s\"", newFilename), w.Header().Get("Content-Disposition"))
 }
 
+func TestContextRenderAndEscapeAttachment(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+	maliciousFilename := "tampering_field.sh\"; \\\"; dummy=.go"
+	actualEscapedResponseFilename := "tampering_field.sh\\\"; \\\\\\\"; dummy=.go"
+
+	c.Request, _ = http.NewRequest("GET", "/", nil)
+	c.FileAttachment("./gin.go", maliciousFilename)
+
+	assert.Equal(t, 200, w.Code)
+	assert.Contains(t, w.Body.String(), "func New(opts ...OptionFunc) *Engine {")
+	assert.Equal(t, fmt.Sprintf("attachment; filename=\"%s\"", actualEscapedResponseFilename), w.Header().Get("Content-Disposition"))
+}
+
 func TestContextRenderUTF8Attachment(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
@@ -1041,12 +1057,12 @@ func TestContextRenderUTF8Attachment(t *testing.T) {
 	c.FileAttachment("./gin.go", newFilename)
 
 	assert.Equal(t, 200, w.Code)
-	assert.Contains(t, w.Body.String(), "func New() *Engine {")
+	assert.Contains(t, w.Body.String(), "func New(opts ...OptionFunc) *Engine {")
 	assert.Equal(t, `attachment; filename*=UTF-8''`+url.QueryEscape(newFilename), w.Header().Get("Content-Disposition"))
 }
 
 // TestContextRenderYAML tests that the response is serialized as YAML
-// and Content-Type is set to application/x-yaml
+// and Content-Type is set to application/yaml
 func TestContextRenderYAML(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
@@ -1055,7 +1071,7 @@ func TestContextRenderYAML(t *testing.T) {
 
 	assert.Equal(t, http.StatusCreated, w.Code)
 	assert.Equal(t, "foo: bar\n", w.Body.String())
-	assert.Equal(t, "application/x-yaml; charset=utf-8", w.Header().Get("Content-Type"))
+	assert.Equal(t, "application/yaml; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
 // TestContextRenderTOML tests that the response is serialized as TOML
@@ -1203,7 +1219,7 @@ func TestContextNegotiationWithYAML(t *testing.T) {
 
 	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "foo: bar\n", w.Body.String())
-	assert.Equal(t, "application/x-yaml; charset=utf-8", w.Header().Get("Content-Type"))
+	assert.Equal(t, "application/yaml; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
 func TestContextNegotiationWithTOML(t *testing.T) {
@@ -1555,6 +1571,12 @@ func TestContextClientIP(t *testing.T) {
 	c.Request.Header.Del("CF-Connecting-IP")
 	assert.Equal(t, "40.40.40.40", c.ClientIP())
 
+	c.engine.TrustedPlatform = PlatformFlyIO
+	assert.Equal(t, "70.70.70.70", c.ClientIP())
+
+	c.Request.Header.Del("Fly-Client-IP")
+	assert.Equal(t, "40.40.40.40", c.ClientIP())
+
 	c.engine.TrustedPlatform = ""
 
 	// no port
@@ -1567,6 +1589,7 @@ func resetContextForClientIPTests(c *Context) {
 	c.Request.Header.Set("X-Forwarded-For", "  20.20.20.20, 30.30.30.30")
 	c.Request.Header.Set("X-Appengine-Remote-Addr", "50.50.50.50")
 	c.Request.Header.Set("CF-Connecting-IP", "60.60.60.60")
+	c.Request.Header.Set("Fly-Client-IP", "70.70.70.70")
 	c.Request.RemoteAddr = "  40.40.40.40:42123 "
 	c.engine.TrustedPlatform = ""
 	c.engine.trustedCIDRs = defaultTrustedCIDRs
@@ -1983,7 +2006,7 @@ func TestContextGolangContext(t *testing.T) {
 	ti, ok := c.Deadline()
 	assert.Equal(t, ti, time.Time{})
 	assert.False(t, ok)
-	assert.Equal(t, c.Value(0), c.Request)
+	assert.Equal(t, c.Value(ContextRequestKey), c.Request)
 	assert.Equal(t, c.Value(ContextKey), c)
 	assert.Nil(t, c.Value("foo"))
 
@@ -2183,6 +2206,24 @@ func TestRemoteIPFail(t *testing.T) {
 	assert.False(t, trust)
 }
 
+func TestHasRequestContext(t *testing.T) {
+	c, _ := CreateTestContext(httptest.NewRecorder())
+	assert.False(t, c.hasRequestContext(), "no request, no fallback")
+	c.engine.ContextWithFallback = true
+	assert.False(t, c.hasRequestContext(), "no request, has fallback")
+	c.Request, _ = http.NewRequest(http.MethodGet, "/", nil)
+	assert.True(t, c.hasRequestContext(), "has request, has fallback")
+	c.Request, _ = http.NewRequestWithContext(nil, "", "", nil) //nolint:staticcheck
+	assert.False(t, c.hasRequestContext(), "has request with nil ctx, has fallback")
+	c.engine.ContextWithFallback = false
+	assert.False(t, c.hasRequestContext(), "has request, no fallback")
+
+	c = &Context{}
+	assert.False(t, c.hasRequestContext(), "no request, no engine")
+	c.Request, _ = http.NewRequest(http.MethodGet, "/", nil)
+	assert.False(t, c.hasRequestContext(), "has request, no engine")
+}
+
 func TestContextWithFallbackDeadlineFromRequestContext(t *testing.T) {
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	// enable ContextWithFallback feature flag
@@ -2395,3 +2436,42 @@ func TestCreateTestContextWithRouteParams(t *testing.T) {
 	assert.Equal(t, http.StatusOK, w.Code)
 	assert.Equal(t, "hello gin", w.Body.String())
 }
+
+type interceptedWriter struct {
+	ResponseWriter
+	b *bytes.Buffer
+}
+
+func (i interceptedWriter) WriteHeader(code int) {
+	i.Header().Del("X-Test")
+	i.ResponseWriter.WriteHeader(code)
+}
+
+func TestInterceptedHeader(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, r := CreateTestContext(w)
+
+	r.Use(func(c *Context) {
+		i := interceptedWriter{
+			ResponseWriter: c.Writer,
+			b:              bytes.NewBuffer(nil),
+		}
+		c.Writer = i
+		c.Next()
+		c.Header("X-Test", "overridden")
+		c.Writer = i.ResponseWriter
+	})
+	r.GET("/", func(c *Context) {
+		c.Header("X-Test", "original")
+		c.Header("X-Test-2", "present")
+		c.String(http.StatusOK, "hello world")
+	})
+	c.Request = httptest.NewRequest("GET", "/", nil)
+	r.HandleContext(c)
+	// Result() has headers frozen when WriteHeaderNow() has been called
+	// Compared to this time, this is when the response headers will be flushed
+	// As response is flushed on c.String, the Header cannot be set by the first
+	// middleware. Assert this
+	assert.Equal(t, "", w.Result().Header.Get("X-Test"))
+	assert.Equal(t, "present", w.Result().Header.Get("X-Test-2"))
+}
diff --git a/debug.go b/debug.go
index cbcedbc98f..1761fe325e 100644
--- a/debug.go
+++ b/debug.go
@@ -12,7 +12,7 @@ import (
 	"strings"
 )
 
-const ginSupportMinGoVer = 16
+const ginSupportMinGoVer = 18
 
 // IsDebugging returns true if the framework is running in debug mode.
 // Use SetMode(gin.ReleaseMode) to disable debug mode.
@@ -23,6 +23,9 @@ func IsDebugging() bool {
 // DebugPrintRouteFunc indicates debug log output format.
 var DebugPrintRouteFunc func(httpMethod, absolutePath, handlerName string, nuHandlers int)
 
+// DebugPrintFunc indicates debug log output format.
+var DebugPrintFunc func(format string, values ...interface{})
+
 func debugPrintRoute(httpMethod, absolutePath string, handlers HandlersChain) {
 	if IsDebugging() {
 		nuHandlers := len(handlers)
@@ -48,12 +51,19 @@ func debugPrintLoadTemplate(tmpl *template.Template) {
 }
 
 func debugPrint(format string, values ...any) {
-	if IsDebugging() {
-		if !strings.HasSuffix(format, "\n") {
-			format += "\n"
-		}
-		fmt.Fprintf(DefaultWriter, "[GIN-debug] "+format, values...)
+	if !IsDebugging() {
+		return
+	}
+
+	if DebugPrintFunc != nil {
+		DebugPrintFunc(format, values...)
+		return
+	}
+
+	if !strings.HasSuffix(format, "\n") {
+		format += "\n"
 	}
+	fmt.Fprintf(DefaultWriter, "[GIN-debug] "+format, values...)
 }
 
 func getMinVer(v string) (uint64, error) {
@@ -67,7 +77,7 @@ func getMinVer(v string) (uint64, error) {
 
 func debugPrintWARNINGDefault() {
 	if v, e := getMinVer(runtime.Version()); e == nil && v < ginSupportMinGoVer {
-		debugPrint(`[WARNING] Now Gin requires Go 1.16+.
+		debugPrint(`[WARNING] Now Gin requires Go 1.18+.
 
 `)
 	}
diff --git a/debug_test.go b/debug_test.go
index ce8b19da7b..2d5e9a5600 100644
--- a/debug_test.go
+++ b/debug_test.go
@@ -21,7 +21,7 @@ import (
 
 // TODO
 // func debugRoute(httpMethod, absolutePath string, handlers HandlersChain) {
-// func debugPrint(format string, values ...interface{}) {
+// func debugPrint(format string, values ...any) {
 
 func TestIsDebugging(t *testing.T) {
 	SetMode(DebugMode)
@@ -104,7 +104,7 @@ func TestDebugPrintWARNINGDefault(t *testing.T) {
 	})
 	m, e := getMinVer(runtime.Version())
 	if e == nil && m < ginSupportMinGoVer {
-		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.16+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
+		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.18+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	} else {
 		assert.Equal(t, "[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	}
diff --git a/deprecated.go b/deprecated.go
index fdad855477..b4c6cd88e8 100644
--- a/deprecated.go
+++ b/deprecated.go
@@ -12,8 +12,10 @@ import (
 
 // BindWith binds the passed struct pointer using the specified binding engine.
 // See the binding package.
+//
+// Deprecated: Use MustBindWith or ShouldBindWith.
 func (c *Context) BindWith(obj any, b binding.Binding) error {
-	log.Println(`BindWith(\"interface{}, binding.Binding\") error is going to
+	log.Println(`BindWith(\"any, binding.Binding\") error is going to
 	be deprecated, please check issue #662 and either use MustBindWith() if you
 	want HTTP 400 to be automatically returned if any error occur, or use
 	ShouldBindWith() if you need to manage the error.`)
diff --git a/docs/doc.md b/docs/doc.md
index d0efcc4083..8b9d12f88b 100644
--- a/docs/doc.md
+++ b/docs/doc.md
@@ -426,7 +426,7 @@ func main() {
   r.Use(gin.Logger())
 
   // Recovery middleware recovers from any panics and writes a 500 if there was one.
-  r.Use(gin.CustomRecovery(func(c *gin.Context, recovered interface{}) {
+  r.Use(gin.CustomRecovery(func(c *gin.Context, recovered any) {
     if err, ok := recovered.(string); ok {
       c.String(http.StatusInternalServerError, fmt.Sprintf("error: %s", err))
     }
@@ -509,6 +509,44 @@ Sample Output
 ::1 - [Fri, 07 Dec 2018 17:04:38 JST] "GET /ping HTTP/1.1 200 122.767µs "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.80 Safari/537.36" "
 ```
 
+### Skip logging
+
+```go
+func main() {
+  router := gin.New()
+  
+  // skip logging for desired paths by setting SkipPaths in LoggerConfig
+  loggerConfig := gin.LoggerConfig{SkipPaths: []string{"/metrics"}}
+  
+  // skip logging based on your logic by setting Skip func in LoggerConfig
+  loggerConfig.Skip = func(c *gin.Context) bool {
+      // as an example skip non server side errors
+      return c.Writer.Status() < http.StatusInternalServerError
+  }
+  
+  engine.Use(gin.LoggerWithConfig(loggerConfig))
+  router.Use(gin.Recovery())
+  
+  // skipped
+  router.GET("/metrics", func(c *gin.Context) {
+      c.Status(http.StatusNotImplemented)
+  })
+
+  // skipped
+  router.GET("/ping", func(c *gin.Context) {
+      c.String(http.StatusOK, "pong")
+  })
+
+  // not skipped
+  router.GET("/data", func(c *gin.Context) {
+    c.Status(http.StatusNotImplemented)
+  })
+  
+  router.Run(":8080")
+}
+
+```
+
 ### Controlling Log output coloring
 
 By default, logs output on console should be colorized depending on the detected TTY.
@@ -1036,7 +1074,7 @@ curl -X POST -v --form name=user --form "avatar=@./avatar.png" http://localhost:
 func main() {
   r := gin.Default()
 
-  // gin.H is a shortcut for map[string]interface{}
+  // gin.H is a shortcut for map[string]any
   r.GET("/someJSON", func(c *gin.Context) {
     c.JSON(http.StatusOK, gin.H{"message": "hey", "status": http.StatusOK})
   })
@@ -2001,7 +2039,7 @@ func (customerBinding) Name() string {
   return "form"
 }
 
-func (customerBinding) Bind(req *http.Request, obj interface{}) error {
+func (customerBinding) Bind(req *http.Request, obj any) error {
   if err := req.ParseForm(); err != nil {
     return err
   }
@@ -2016,7 +2054,7 @@ func (customerBinding) Bind(req *http.Request, obj interface{}) error {
   return validate(obj)
 }
 
-func validate(obj interface{}) error {
+func validate(obj any) error {
   if binding.Validator == nil {
     return nil
   }
@@ -2216,10 +2254,16 @@ import (
 func main() {
   router := gin.Default()
   // Use predefined header gin.PlatformXXX
+  // Google App Engine
   router.TrustedPlatform = gin.PlatformGoogleAppEngine
-  // Or set your own trusted request header for another trusted proxy service
-  // Don't set it to any suspect request header, it's unsafe
-  router.TrustedPlatform = "X-CDN-IP"
+  // Cloudflare
+  router.TrustedPlatform = gin.PlatformCloudflare
+  // Fly.io
+  router.TrustedPlatform = gin.PlatformFlyIO
+  // Or, you can set your own trusted request header. But be sure your CDN
+  // prevents users from passing this header! For example, if your CDN puts
+  // the client IP in X-CDN-Client-IP:
+  router.TrustedPlatform = "X-CDN-Client-IP"
 
   router.GET("/", func(c *gin.Context) {
     // If you set TrustedPlatform, ClientIP() will resolve the
diff --git a/fs.go b/fs.go
index 64274735e2..f17d7434d9 100644
--- a/fs.go
+++ b/fs.go
@@ -39,7 +39,7 @@ func (fs onlyFilesFS) Open(name string) (http.File, error) {
 }
 
 // Readdir overrides the http.File default implementation.
-func (f neuteredReaddirFile) Readdir(count int) ([]os.FileInfo, error) {
+func (f neuteredReaddirFile) Readdir(_ int) ([]os.FileInfo, error) {
 	// this disables directory listing
 	return nil, nil
 }
diff --git a/gin.go b/gin.go
index 35159d03fa..1633fe13f9 100644
--- a/gin.go
+++ b/gin.go
@@ -11,6 +11,7 @@ import (
 	"net/http"
 	"os"
 	"path"
+	"regexp"
 	"strings"
 	"sync"
 
@@ -40,9 +41,15 @@ var defaultTrustedCIDRs = []*net.IPNet{
 	},
 }
 
+var regSafePrefix = regexp.MustCompile("[^a-zA-Z0-9/-]+")
+var regRemoveRepeatedChar = regexp.MustCompile("/{2,}")
+
 // HandlerFunc defines the handler used by gin middleware as return value.
 type HandlerFunc func(*Context)
 
+// OptionFunc defines the function to change the default configuration
+type OptionFunc func(*Engine)
+
 // HandlersChain defines a HandlerFunc slice.
 type HandlersChain []HandlerFunc
 
@@ -73,6 +80,8 @@ const (
 	// PlatformCloudflare when using Cloudflare's CDN. Trust CF-Connecting-IP for determining
 	// the client's IP
 	PlatformCloudflare = "CF-Connecting-IP"
+	// PlatformFlyIO when running on Fly.io. Trust Fly-Client-IP for determining the client's IP
+	PlatformFlyIO = "Fly-Client-IP"
 )
 
 // Engine is the framework's instance, it contains the muxer, middleware and configuration settings.
@@ -176,7 +185,7 @@ var _ IRouter = (*Engine)(nil)
 // - ForwardedByClientIP:    true
 // - UseRawPath:             false
 // - UnescapePathValues:     true
-func New() *Engine {
+func New(opts ...OptionFunc) *Engine {
 	debugPrintWARNINGNew()
 	engine := &Engine{
 		RouterGroup: RouterGroup{
@@ -205,15 +214,15 @@ func New() *Engine {
 	engine.pool.New = func() any {
 		return engine.allocateContext(engine.maxParams)
 	}
-	return engine
+	return engine.With(opts...)
 }
 
 // Default returns an Engine instance with the Logger and Recovery middleware already attached.
-func Default() *Engine {
+func Default(opts ...OptionFunc) *Engine {
 	debugPrintWARNINGDefault()
 	engine := New()
 	engine.Use(Logger(), Recovery())
-	return engine
+	return engine.With(opts...)
 }
 
 func (engine *Engine) Handler() http.Handler {
@@ -307,6 +316,15 @@ func (engine *Engine) Use(middleware ...HandlerFunc) IRoutes {
 	return engine
 }
 
+// With returns a new Engine instance with the provided options.
+func (engine *Engine) With(opts ...OptionFunc) *Engine {
+	for _, opt := range opts {
+		opt(engine)
+	}
+
+	return engine
+}
+
 func (engine *Engine) rebuild404Handlers() {
 	engine.allNoRoute = engine.combineHandlers(engine.noRoute)
 }
@@ -330,7 +348,6 @@ func (engine *Engine) addRoute(method, path string, handlers HandlersChain) {
 	}
 	root.addRoute(path, handlers)
 
-	// Update maxParams
 	if paramsCount := countParams(path); paramsCount > engine.maxParams {
 		engine.maxParams = paramsCount
 	}
@@ -511,7 +528,7 @@ func (engine *Engine) RunUnix(file string) (err error) {
 
 	if engine.isUnsafeTrustedProxies() {
 		debugPrint("[WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.\n" +
-			"Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.")
+			"Please check https://github.com/gin-gonic/gin/blob/master/docs/doc.md#dont-trust-all-proxies for details.")
 	}
 
 	listener, err := net.Listen("unix", file)
@@ -534,7 +551,7 @@ func (engine *Engine) RunFd(fd int) (err error) {
 
 	if engine.isUnsafeTrustedProxies() {
 		debugPrint("[WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.\n" +
-			"Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.")
+			"Please check https://github.com/gin-gonic/gin/blob/master/docs/doc.md#dont-trust-all-proxies for details.")
 	}
 
 	f := os.NewFile(uintptr(fd), fmt.Sprintf("fd@%d", fd))
@@ -555,7 +572,7 @@ func (engine *Engine) RunListener(listener net.Listener) (err error) {
 
 	if engine.isUnsafeTrustedProxies() {
 		debugPrint("[WARNING] You trusted all proxies, this is NOT safe. We recommend you to set a value.\n" +
-			"Please check https://pkg.go.dev/github.com/gin-gonic/gin#readme-don-t-trust-all-proxies for details.")
+			"Please check https://github.com/gin-gonic/gin/blob/master/docs/doc.md#dont-trust-all-proxies for details.")
 	}
 
 	err = http.Serve(listener, engine.Handler())
@@ -630,17 +647,25 @@ func (engine *Engine) handleHTTPRequest(c *Context) {
 	}
 
 	if engine.HandleMethodNotAllowed {
+		// According to RFC 7231 section 6.5.5, MUST generate an Allow header field in response
+		// containing a list of the target resource's currently supported methods.
+		allowed := make([]string, 0, len(t)-1)
 		for _, tree := range engine.trees {
 			if tree.method == httpMethod {
 				continue
 			}
 			if value := tree.root.getValue(rPath, nil, c.skippedNodes, unescape); value.handlers != nil {
-				c.handlers = engine.allNoMethod
-				serveError(c, http.StatusMethodNotAllowed, default405Body)
-				return
+				allowed = append(allowed, tree.method)
 			}
 		}
+		if len(allowed) > 0 {
+			c.handlers = engine.allNoMethod
+			c.writermem.Header().Set("Allow", strings.Join(allowed, ", "))
+			serveError(c, http.StatusMethodNotAllowed, default405Body)
+			return
+		}
 	}
+
 	c.handlers = engine.allNoRoute
 	serveError(c, http.StatusNotFound, default404Body)
 }
@@ -668,6 +693,9 @@ func redirectTrailingSlash(c *Context) {
 	req := c.Request
 	p := req.URL.Path
 	if prefix := path.Clean(c.Request.Header.Get("X-Forwarded-Prefix")); prefix != "." {
+		prefix = regSafePrefix.ReplaceAllString(prefix, "")
+		prefix = regRemoveRepeatedChar.ReplaceAllString(prefix, "/")
+
 		p = prefix + "/" + req.URL.Path
 	}
 	req.URL.Path = p + "/"
diff --git a/gin_test.go b/gin_test.go
index 8825ac7ef8..4550a7e5c8 100644
--- a/gin_test.go
+++ b/gin_test.go
@@ -696,3 +696,37 @@ func assertRoutePresent(t *testing.T, gotRoutes RoutesInfo, wantRoute RouteInfo)
 
 func handlerTest1(c *Context) {}
 func handlerTest2(c *Context) {}
+
+func TestNewOptionFunc(t *testing.T) {
+	var fc = func(e *Engine) {
+		e.GET("/test1", handlerTest1)
+		e.GET("/test2", handlerTest2)
+
+		e.Use(func(c *Context) {
+			c.Next()
+		})
+	}
+
+	r := New(fc)
+
+	routes := r.Routes()
+	assertRoutePresent(t, routes, RouteInfo{Path: "/test1", Method: "GET", Handler: "github.com/gin-gonic/gin.handlerTest1"})
+	assertRoutePresent(t, routes, RouteInfo{Path: "/test2", Method: "GET", Handler: "github.com/gin-gonic/gin.handlerTest2"})
+}
+
+func TestWithOptionFunc(t *testing.T) {
+	r := New()
+
+	r.With(func(e *Engine) {
+		e.GET("/test1", handlerTest1)
+		e.GET("/test2", handlerTest2)
+
+		e.Use(func(c *Context) {
+			c.Next()
+		})
+	})
+
+	routes := r.Routes()
+	assertRoutePresent(t, routes, RouteInfo{Path: "/test1", Method: "GET", Handler: "github.com/gin-gonic/gin.handlerTest1"})
+	assertRoutePresent(t, routes, RouteInfo{Path: "/test2", Method: "GET", Handler: "github.com/gin-gonic/gin.handlerTest2"})
+}
diff --git a/go.mod b/go.mod
index 51353f5448..11ce23e80e 100644
--- a/go.mod
+++ b/go.mod
@@ -1,36 +1,37 @@
 module github.com/gin-gonic/gin
 
-go 1.18
+go 1.20
 
 require (
-	github.com/bytedance/sonic v1.7.1
+	github.com/bytedance/sonic v1.11.0
 	github.com/gin-contrib/sse v0.1.0
-	github.com/go-playground/validator/v10 v10.11.2
-	github.com/goccy/go-json v0.10.0
+	github.com/go-playground/validator/v10 v10.18.0
+	github.com/goccy/go-json v0.10.2
 	github.com/json-iterator/go v1.1.12
-	github.com/mattn/go-isatty v0.0.17
-	github.com/pelletier/go-toml/v2 v2.0.6
-	github.com/stretchr/testify v1.8.1
-	github.com/ugorji/go/codec v1.2.9
-	golang.org/x/net v0.5.0
-	google.golang.org/protobuf v1.28.1
+	github.com/mattn/go-isatty v0.0.20
+	github.com/pelletier/go-toml/v2 v2.1.1
+	github.com/stretchr/testify v1.8.4
+	github.com/ugorji/go/codec v1.2.12
+	golang.org/x/net v0.21.0
+	google.golang.org/protobuf v1.33.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
-	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d // indirect
+	github.com/chenzhuoyu/iasm v0.9.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/klauspost/cpuid/v2 v2.0.14 // indirect
-	github.com/kr/text v0.2.0 // indirect
-	github.com/leodido/go-urn v1.2.1 // indirect
-	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.6 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
-	golang.org/x/arch v0.0.0-20220412001346-fc48f9fe4c15 // indirect
-	golang.org/x/crypto v0.5.0 // indirect
-	golang.org/x/sys v0.4.0 // indirect
-	golang.org/x/text v0.6.0 // indirect
+	golang.org/x/arch v0.7.0 // indirect
+	golang.org/x/crypto v0.19.0 // indirect
+	golang.org/x/sys v0.17.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 01f9495294..49eae34304 100644
--- a/go.sum
+++ b/go.sum
@@ -1,13 +1,19 @@
 github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
-github.com/bytedance/sonic v1.7.1 h1:UYWEKUHQDye89c2U6zvrvuxWdGCI/wCrZITFQmKGtGc=
-github.com/bytedance/sonic v1.7.1/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U=
+github.com/bytedance/sonic v1.10.0-rc/go.mod h1:ElCzW+ufi8qKqNW0FY314xriJhyJhuoJ3gFZdAHF7NM=
+github.com/bytedance/sonic v1.11.0 h1:FwNNv6Vu4z2Onf1++LNzxB/QhitD8wuTdpZzMTGITWo=
+github.com/bytedance/sonic v1.11.0/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
 github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY=
-github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams=
 github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d h1:77cEq6EriyTZ0g/qfRdp61a3Uu/AWrgIq2s0ClJV1g0=
+github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d/go.mod h1:8EPpVsBuRksnlj1mLy4AWzRNQYxauNi62uWcE3to6eA=
+github.com/chenzhuoyu/iasm v0.9.0/go.mod h1:Xjy2NpN3h7aUqeqM+woSuuvxmIe6+DDsiNLIrkAmYog=
+github.com/chenzhuoyu/iasm v0.9.1 h1:tUHQJXo3NhBqw6s33wkGn9SP3bvrWLdlVIJ3hQBL7P0=
+github.com/chenzhuoyu/iasm v0.9.1/go.mod h1:Xjy2NpN3h7aUqeqM+woSuuvxmIe6+DDsiNLIrkAmYog=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
+github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
 github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
@@ -15,69 +21,65 @@ github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/o
 github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
 github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
-github.com/go-playground/validator/v10 v10.11.2 h1:q3SHpufmypg+erIExEKUmsgmhDTyhcJ38oeKGACXohU=
-github.com/go-playground/validator/v10 v10.11.2/go.mod h1:NieE624vt4SCTJtD87arVLvdmjPAeV8BQlHtMnw9D7s=
-github.com/goccy/go-json v0.10.0 h1:mXKd9Qw4NuzShiRlOXKews24ufknHO7gx30lsDyokKA=
-github.com/goccy/go-json v0.10.0/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/go-playground/validator/v10 v10.18.0 h1:BvolUXjp4zuvkZ5YN5t7ebzbhlUtPsPm2S9NAZ5nl9U=
+github.com/go-playground/validator/v10 v10.18.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM=
+github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
+github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
-github.com/klauspost/cpuid/v2 v2.0.14 h1:QRqdp6bb9M9S5yyKeYteXKuoKE4p0tGlra81fKOpWH8=
-github.com/klauspost/cpuid/v2 v2.0.14/go.mod h1:g2LTdtYhdyuGPqyWyv7qRAmj1WBqxuObKfj5c0PQa7c=
-github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
-github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
-github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/leodido/go-urn v1.2.1 h1:BqpAaACuzVSgi/VLzGZIobT2z4v53pjosyNd9Yv6n/w=
-github.com/leodido/go-urn v1.2.1/go.mod h1:zt4jvISO2HfUBqxjfIshjdMTYS56ZS/qv49ictyFfxY=
-github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
-github.com/mattn/go-isatty v0.0.17/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
-github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
+github.com/klauspost/cpuid/v2 v2.2.6 h1:ndNyv040zDGIDh8thGkXYjnFtiN02M1PVVF+JE/48xc=
+github.com/klauspost/cpuid/v2 v2.2.6/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
+github.com/knz/go-libedit v1.10.1/go.mod h1:MZTVkCWyz0oBc7JOWP3wNAzd002ZbM/5hgShxwh4x8M=
+github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
+github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
-github.com/pelletier/go-toml/v2 v2.0.6 h1:nrzqCb7j9cDFj2coyLNLaZuJTLjWjlaz6nvTvIwycIU=
-github.com/pelletier/go-toml/v2 v2.0.6/go.mod h1:eumQOmlWiOPt5WriQQqoM5y18pDHwha2N+QD+EUNTek=
+github.com/pelletier/go-toml/v2 v2.1.1 h1:LWAJwfNvjQZCFIDKWYQaM62NcYeYViCmWIwmOStowAI=
+github.com/pelletier/go-toml/v2 v2.1.1/go.mod h1:tJU2Z3ZkXwnxa4DPO899bsyIoywizdUvyaeZurnPPDc=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/rogpeppe/go-internal v1.8.0 h1:FCbCCtXNOY3UtUuHUYaghJg4y7Fd14rXifAYUAtL9R8=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
-github.com/ugorji/go/codec v1.2.9 h1:rmenucSohSTiyL09Y+l2OCk+FrMxGMzho2+tjr5ticU=
-github.com/ugorji/go/codec v1.2.9/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
+github.com/ugorji/go/codec v1.2.12 h1:9LC83zGrHhuUA9l16C9AHXAqEV/2wBQ4nkvumAE65EE=
+github.com/ugorji/go/codec v1.2.12/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
 golang.org/x/arch v0.0.0-20210923205945-b76863e36670/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
-golang.org/x/arch v0.0.0-20220412001346-fc48f9fe4c15 h1:GVfVkciLYxn5mY5EncwAe0SXUn9Rm81rRkZ0TTmn/cU=
-golang.org/x/arch v0.0.0-20220412001346-fc48f9fe4c15/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
-golang.org/x/crypto v0.5.0 h1:U/0M97KRkSFvyD/3FSmdP5W5swImpNgle/EHFhOsQPE=
-golang.org/x/crypto v0.5.0/go.mod h1:NK/OQwhpMQP3MwtdjgLlYHnH9ebylxKWv3e0fK+mkQU=
-golang.org/x/net v0.5.0 h1:GyT4nK/YDHSqa1c4753ouYCDajOYKTja9Xb/OHtgvSw=
-golang.org/x/net v0.5.0/go.mod h1:DivGGAXEgPSlEBzxGzZI+ZLohi+xUj054jfeKui00ws=
-golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.4.0 h1:Zr2JFtRQNX3BCZ8YtxRE9hNJYC8J6I1MVbMg6owUp18=
-golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/text v0.6.0 h1:3XmdazWV+ubf7QgHSTWeykHOci5oeekaGJBLkrkaw4k=
-golang.org/x/text v0.6.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/arch v0.7.0 h1:pskyeJh/3AmoQ8CPE95vxHLqp1G1GfGNXTmcl9NEKTc=
+golang.org/x/arch v0.7.0/go.mod h1:FEVrYAQjsQXMVJ1nsMoVVXPZg6p2JE2mx8psSWTDQys=
+golang.org/x/crypto v0.19.0 h1:ENy+Az/9Y1vSrlrvBSyna3PITt4tiZLf7sgCjZBX7Wo=
+golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
+golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=
+golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
-google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
diff --git a/internal/bytesconv/bytesconv.go b/internal/bytesconv/bytesconv_1.19.go
similarity index 96%
rename from internal/bytesconv/bytesconv.go
rename to internal/bytesconv/bytesconv_1.19.go
index 86e4c4d44c..669c9c914e 100644
--- a/internal/bytesconv/bytesconv.go
+++ b/internal/bytesconv/bytesconv_1.19.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a MIT style
 // license that can be found in the LICENSE file.
 
+//go:build !go1.20
+
 package bytesconv
 
 import (
diff --git a/internal/bytesconv/bytesconv_1.20.go b/internal/bytesconv/bytesconv_1.20.go
new file mode 100644
index 0000000000..5b6040a6b3
--- /dev/null
+++ b/internal/bytesconv/bytesconv_1.20.go
@@ -0,0 +1,23 @@
+// Copyright 2023 Gin Core Team. All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+//go:build go1.20
+
+package bytesconv
+
+import (
+	"unsafe"
+)
+
+// StringToBytes converts string to byte slice without a memory allocation.
+// For more details, see https://github.com/golang/go/issues/53003#issuecomment-1140276077.
+func StringToBytes(s string) []byte {
+	return unsafe.Slice(unsafe.StringData(s), len(s))
+}
+
+// BytesToString converts byte slice to string without a memory allocation.
+// For more details, see https://github.com/golang/go/issues/53003#issuecomment-1140276077.
+func BytesToString(b []byte) string {
+	return unsafe.String(unsafe.SliceData(b), len(b))
+}
diff --git a/internal/json/go_json.go b/internal/json/go_json.go
index 23f717265e..47c3559831 100644
--- a/internal/json/go_json.go
+++ b/internal/json/go_json.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build go_json
-// +build go_json
 
 package json
 
diff --git a/internal/json/json.go b/internal/json/json.go
index c5f3efc88d..c7ee83eb3b 100644
--- a/internal/json/json.go
+++ b/internal/json/json.go
@@ -3,9 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !jsoniter && !go_json && !(sonic && avx && (linux || windows || darwin) && amd64)
-// +build !jsoniter
-// +build !go_json
-// +build !sonic !avx !linux,!windows,!darwin !amd64
 
 package json
 
diff --git a/internal/json/jsoniter.go b/internal/json/jsoniter.go
index 853b1a901e..45ed16ba9f 100644
--- a/internal/json/jsoniter.go
+++ b/internal/json/jsoniter.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build jsoniter
-// +build jsoniter
 
 package json
 
diff --git a/internal/json/sonic.go b/internal/json/sonic.go
index 5a9ca4b2d0..529e16d072 100644
--- a/internal/json/sonic.go
+++ b/internal/json/sonic.go
@@ -3,10 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build sonic && avx && (linux || windows || darwin) && amd64
-// +build sonic
-// +build avx
-// +build linux windows darwin
-// +build amd64
 
 package json
 
diff --git a/logger.go b/logger.go
index cd1e7fa6e9..db2c6832b2 100644
--- a/logger.go
+++ b/logger.go
@@ -47,8 +47,15 @@ type LoggerConfig struct {
 	// SkipPaths is an url path array which logs are not written.
 	// Optional.
 	SkipPaths []string
+
+	// Skip is a Skipper that indicates which logs should not be written.
+	// Optional.
+	Skip Skipper
 }
 
+// Skipper is a function to skip logs based on provided Context
+type Skipper func(c *Context) bool
+
 // LogFormatter gives the signature of the formatter function passed to LoggerWithFormatter
 type LogFormatter func(params LogFormatterParams) string
 
@@ -83,6 +90,8 @@ func (p *LogFormatterParams) StatusCodeColor() string {
 	code := p.StatusCode
 
 	switch {
+	case code >= http.StatusContinue && code < http.StatusOK:
+		return white
 	case code >= http.StatusOK && code < http.StatusMultipleChoices:
 		return green
 	case code >= http.StatusMultipleChoices && code < http.StatusBadRequest:
@@ -239,32 +248,34 @@ func LoggerWithConfig(conf LoggerConfig) HandlerFunc {
 		// Process request
 		c.Next()
 
-		// Log only when path is not being skipped
-		if _, ok := skip[path]; !ok {
-			param := LogFormatterParams{
-				Request: c.Request,
-				isTerm:  isTerm,
-				Keys:    c.Keys,
-			}
-
-			// Stop timer
-			param.TimeStamp = time.Now()
-			param.Latency = param.TimeStamp.Sub(start)
+		// Log only when it is not being skipped
+		if _, ok := skip[path]; ok || (conf.Skip != nil && conf.Skip(c)) {
+			return
+		}
 
-			param.ClientIP = c.ClientIP()
-			param.Method = c.Request.Method
-			param.StatusCode = c.Writer.Status()
-			param.ErrorMessage = c.Errors.ByType(ErrorTypePrivate).String()
+		param := LogFormatterParams{
+			Request: c.Request,
+			isTerm:  isTerm,
+			Keys:    c.Keys,
+		}
 
-			param.BodySize = c.Writer.Size()
+		// Stop timer
+		param.TimeStamp = time.Now()
+		param.Latency = param.TimeStamp.Sub(start)
 
-			if raw != "" {
-				path = path + "?" + raw
-			}
+		param.ClientIP = c.ClientIP()
+		param.Method = c.Request.Method
+		param.StatusCode = c.Writer.Status()
+		param.ErrorMessage = c.Errors.ByType(ErrorTypePrivate).String()
 
-			param.Path = path
+		param.BodySize = c.Writer.Size()
 
-			fmt.Fprint(out, formatter(param))
+		if raw != "" {
+			path = path + "?" + raw
 		}
+
+		param.Path = path
+
+		fmt.Fprint(out, formatter(param))
 	}
 }
diff --git a/logger_test.go b/logger_test.go
index 5f78708f1a..6c1814dc11 100644
--- a/logger_test.go
+++ b/logger_test.go
@@ -310,6 +310,7 @@ func TestColorForStatus(t *testing.T) {
 		return p.StatusCodeColor()
 	}
 
+	assert.Equal(t, white, colorForStatus(http.StatusContinue), "1xx should be white")
 	assert.Equal(t, green, colorForStatus(http.StatusOK), "2xx should be green")
 	assert.Equal(t, white, colorForStatus(http.StatusMovedPermanently), "3xx should be white")
 	assert.Equal(t, yellow, colorForStatus(http.StatusNotFound), "4xx should be yellow")
@@ -414,6 +415,26 @@ func TestLoggerWithConfigSkippingPaths(t *testing.T) {
 	assert.Contains(t, buffer.String(), "")
 }
 
+func TestLoggerWithConfigSkipper(t *testing.T) {
+	buffer := new(strings.Builder)
+	router := New()
+	router.Use(LoggerWithConfig(LoggerConfig{
+		Output: buffer,
+		Skip: func(c *Context) bool {
+			return c.Writer.Status() == http.StatusNoContent
+		},
+	}))
+	router.GET("/logged", func(c *Context) { c.Status(http.StatusOK) })
+	router.GET("/skipped", func(c *Context) { c.Status(http.StatusNoContent) })
+
+	PerformRequest(router, "GET", "/logged")
+	assert.Contains(t, buffer.String(), "200")
+
+	buffer.Reset()
+	PerformRequest(router, "GET", "/skipped")
+	assert.Contains(t, buffer.String(), "")
+}
+
 func TestDisableConsoleColor(t *testing.T) {
 	New()
 	assert.Equal(t, autoColor, consoleColorMode)
diff --git a/path_test.go b/path_test.go
index caefd63a80..864302f4e1 100644
--- a/path_test.go
+++ b/path_test.go
@@ -6,6 +6,7 @@
 package gin
 
 import (
+	"runtime"
 	"strings"
 	"testing"
 
@@ -80,6 +81,10 @@ func TestPathCleanMallocs(t *testing.T) {
 		t.Skip("skipping malloc count in short mode")
 	}
 
+	if runtime.GOMAXPROCS(0) > 1 {
+		t.Skip("skipping malloc count; GOMAXPROCS>1")
+	}
+
 	for _, test := range cleanTests {
 		allocs := testing.AllocsPerRun(100, func() { cleanPath(test.result) })
 		assert.EqualValues(t, allocs, 0)
diff --git a/recovery.go b/recovery.go
index 2955c03a0e..515f9d2adc 100644
--- a/recovery.go
+++ b/recovery.go
@@ -103,7 +103,7 @@ func CustomRecoveryWithWriter(out io.Writer, handle RecoveryFunc) HandlerFunc {
 	}
 }
 
-func defaultHandleRecovery(c *Context, err any) {
+func defaultHandleRecovery(c *Context, _ any) {
 	c.AbortWithStatus(http.StatusInternalServerError)
 }
 
@@ -164,7 +164,7 @@ func function(pc uintptr) []byte {
 	if period := bytes.Index(name, dot); period >= 0 {
 		name = name[period+1:]
 	}
-	name = bytes.Replace(name, centerDot, dot, -1)
+	name = bytes.ReplaceAll(name, centerDot, dot)
 	return name
 }
 
diff --git a/render/any.go b/render/any.go
deleted file mode 100644
index b19ad45d9f..0000000000
--- a/render/any.go
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright 2021 Gin Core Team. All rights reserved.
-// Use of this source code is governed by a MIT style
-// license that can be found in the LICENSE file.
-
-//go:build !go1.18
-// +build !go1.18
-
-package render
-
-type any = interface{}
diff --git a/render/msgpack.go b/render/msgpack.go
index e0f30f7a97..d1d8e84b03 100644
--- a/render/msgpack.go
+++ b/render/msgpack.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !nomsgpack
-// +build !nomsgpack
 
 package render
 
diff --git a/render/render.go b/render/render.go
index 7955000c6e..4bdcfa2326 100644
--- a/render/render.go
+++ b/render/render.go
@@ -15,22 +15,22 @@ type Render interface {
 }
 
 var (
-	_ Render     = JSON{}
-	_ Render     = IndentedJSON{}
-	_ Render     = SecureJSON{}
-	_ Render     = JsonpJSON{}
-	_ Render     = XML{}
-	_ Render     = String{}
-	_ Render     = Redirect{}
-	_ Render     = Data{}
-	_ Render     = HTML{}
-	_ HTMLRender = HTMLDebug{}
-	_ HTMLRender = HTMLProduction{}
-	_ Render     = YAML{}
-	_ Render     = Reader{}
-	_ Render     = AsciiJSON{}
-	_ Render     = ProtoBuf{}
-	_ Render     = TOML{}
+	_ Render     = (*JSON)(nil)
+	_ Render     = (*IndentedJSON)(nil)
+	_ Render     = (*SecureJSON)(nil)
+	_ Render     = (*JsonpJSON)(nil)
+	_ Render     = (*XML)(nil)
+	_ Render     = (*String)(nil)
+	_ Render     = (*Redirect)(nil)
+	_ Render     = (*Data)(nil)
+	_ Render     = (*HTML)(nil)
+	_ HTMLRender = (*HTMLDebug)(nil)
+	_ HTMLRender = (*HTMLProduction)(nil)
+	_ Render     = (*YAML)(nil)
+	_ Render     = (*Reader)(nil)
+	_ Render     = (*AsciiJSON)(nil)
+	_ Render     = (*ProtoBuf)(nil)
+	_ Render     = (*TOML)(nil)
 )
 
 func writeContentType(w http.ResponseWriter, value []string) {
diff --git a/render/render_msgpack_test.go b/render/render_msgpack_test.go
index 642123614e..db4b71e5ee 100644
--- a/render/render_msgpack_test.go
+++ b/render/render_msgpack_test.go
@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !nomsgpack
-// +build !nomsgpack
 
 package render
 
diff --git a/render/render_test.go b/render/render_test.go
index 192552513f..145f131641 100644
--- a/render/render_test.go
+++ b/render/render_test.go
@@ -15,6 +15,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/gin-gonic/gin/internal/json"
 	testdata "github.com/gin-gonic/gin/testdata/protoexample"
 	"github.com/stretchr/testify/assert"
 	"google.golang.org/protobuf/proto"
@@ -136,6 +137,51 @@ func TestRenderJsonpJSON(t *testing.T) {
 	assert.Equal(t, "application/javascript; charset=utf-8", w2.Header().Get("Content-Type"))
 }
 
+type errorWriter struct {
+	bufString string
+	*httptest.ResponseRecorder
+}
+
+var _ http.ResponseWriter = (*errorWriter)(nil)
+
+func (w *errorWriter) Write(buf []byte) (int, error) {
+	if string(buf) == w.bufString {
+		return 0, errors.New(`write "` + w.bufString + `" error`)
+	}
+	return w.ResponseRecorder.Write(buf)
+}
+
+func TestRenderJsonpJSONError(t *testing.T) {
+	ew := &errorWriter{
+		ResponseRecorder: httptest.NewRecorder(),
+	}
+
+	jsonpJSON := JsonpJSON{
+		Callback: "foo",
+		Data: map[string]string{
+			"foo": "bar",
+		},
+	}
+
+	cb := template.JSEscapeString(jsonpJSON.Callback)
+	ew.bufString = cb
+	err := jsonpJSON.Render(ew) // error was returned while writing callback
+	assert.Equal(t, `write "`+cb+`" error`, err.Error())
+
+	ew.bufString = `(`
+	err = jsonpJSON.Render(ew)
+	assert.Equal(t, `write "`+`(`+`" error`, err.Error())
+
+	data, _ := json.Marshal(jsonpJSON.Data) // error was returned while writing data
+	ew.bufString = string(data)
+	err = jsonpJSON.Render(ew)
+	assert.Equal(t, `write "`+string(data)+`" error`, err.Error())
+
+	ew.bufString = `);`
+	err = jsonpJSON.Render(ew)
+	assert.Equal(t, `write "`+`);`+`" error`, err.Error())
+}
+
 func TestRenderJsonpJSONError2(t *testing.T) {
 	w := httptest.NewRecorder()
 	data := map[string]any{
@@ -234,12 +280,12 @@ b:
 	d: [3, 4]
 	`
 	(YAML{data}).WriteContentType(w)
-	assert.Equal(t, "application/x-yaml; charset=utf-8", w.Header().Get("Content-Type"))
+	assert.Equal(t, "application/yaml; charset=utf-8", w.Header().Get("Content-Type"))
 
 	err := (YAML{data}).Render(w)
 	assert.NoError(t, err)
 	assert.Equal(t, "|4-\n    a : Easy!\n    b:\n    \tc: 2\n    \td: [3, 4]\n    \t\n", w.Body.String())
-	assert.Equal(t, "application/x-yaml; charset=utf-8", w.Header().Get("Content-Type"))
+	assert.Equal(t, "application/yaml; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
 type fail struct{}
@@ -532,3 +578,16 @@ func TestRenderReaderNoContentLength(t *testing.T) {
 	assert.Equal(t, headers["Content-Disposition"], w.Header().Get("Content-Disposition"))
 	assert.Equal(t, headers["x-request-id"], w.Header().Get("x-request-id"))
 }
+
+func TestRenderWriteError(t *testing.T) {
+	data := []interface{}{"value1", "value2"}
+	prefix := "my-prefix:"
+	r := SecureJSON{Data: data, Prefix: prefix}
+	ew := &errorWriter{
+		bufString:        prefix,
+		ResponseRecorder: httptest.NewRecorder(),
+	}
+	err := r.Render(ew)
+	assert.NotNil(t, err)
+	assert.Equal(t, `write "my-prefix:" error`, err.Error())
+}
diff --git a/render/yaml.go b/render/yaml.go
index fc927c1f28..042bb821da 100644
--- a/render/yaml.go
+++ b/render/yaml.go
@@ -15,7 +15,7 @@ type YAML struct {
 	Data any
 }
 
-var yamlContentType = []string{"application/x-yaml; charset=utf-8"}
+var yamlContentType = []string{"application/yaml; charset=utf-8"}
 
 // Render (YAML) marshals the given interface object and writes data with custom ContentType.
 func (r YAML) Render(w http.ResponseWriter) error {
diff --git a/response_writer_test.go b/response_writer_test.go
index 9fd5e87cce..964aa3071e 100644
--- a/response_writer_test.go
+++ b/response_writer_test.go
@@ -156,3 +156,33 @@ func TestResponseWriterStatusCode(t *testing.T) {
 	// status must be 200 although we tried to change it
 	assert.Equal(t, http.StatusOK, w.Status())
 }
+
+// mockPusherResponseWriter is an http.ResponseWriter that implements http.Pusher.
+type mockPusherResponseWriter struct {
+	http.ResponseWriter
+}
+
+func (m *mockPusherResponseWriter) Push(target string, opts *http.PushOptions) error {
+	return nil
+}
+
+// nonPusherResponseWriter is an http.ResponseWriter that does not implement http.Pusher.
+type nonPusherResponseWriter struct {
+	http.ResponseWriter
+}
+
+func TestPusherWithPusher(t *testing.T) {
+	rw := &mockPusherResponseWriter{}
+	w := &responseWriter{ResponseWriter: rw}
+
+	pusher := w.Pusher()
+	assert.NotNil(t, pusher, "Expected pusher to be non-nil")
+}
+
+func TestPusherWithoutPusher(t *testing.T) {
+	rw := &nonPusherResponseWriter{}
+	w := &responseWriter{ResponseWriter: rw}
+
+	pusher := w.Pusher()
+	assert.Nil(t, pusher, "Expected pusher to be nil")
+}
diff --git a/routes_test.go b/routes_test.go
index ada8e1e457..73f393e71c 100644
--- a/routes_test.go
+++ b/routes_test.go
@@ -180,10 +180,58 @@ func TestRouteRedirectTrailingSlash(t *testing.T) {
 
 	w = PerformRequest(router, http.MethodGet, "/path2", header{Key: "X-Forwarded-Prefix", Value: "/api"})
 	assert.Equal(t, "/api/path2/", w.Header().Get("Location"))
-	assert.Equal(t, 301, w.Code)
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
 
 	w = PerformRequest(router, http.MethodGet, "/path2/", header{Key: "X-Forwarded-Prefix", Value: "/api/"})
-	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, http.StatusOK, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path/", header{Key: "X-Forwarded-Prefix", Value: "../../api#?"})
+	assert.Equal(t, "/api/path", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path/", header{Key: "X-Forwarded-Prefix", Value: "../../api"})
+	assert.Equal(t, "/api/path", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path2", header{Key: "X-Forwarded-Prefix", Value: "../../api"})
+	assert.Equal(t, "/api/path2/", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path2", header{Key: "X-Forwarded-Prefix", Value: "/../../api"})
+	assert.Equal(t, "/api/path2/", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path/", header{Key: "X-Forwarded-Prefix", Value: "api/../../"})
+	assert.Equal(t, "//path", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path/", header{Key: "X-Forwarded-Prefix", Value: "api/../../../"})
+	assert.Equal(t, "/path", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path2", header{Key: "X-Forwarded-Prefix", Value: "../../gin-gonic.com"})
+	assert.Equal(t, "/gin-goniccom/path2/", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path2", header{Key: "X-Forwarded-Prefix", Value: "/../../gin-gonic.com"})
+	assert.Equal(t, "/gin-goniccom/path2/", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path/", header{Key: "X-Forwarded-Prefix", Value: "https://gin-gonic.com/#"})
+	assert.Equal(t, "https/gin-goniccom/https/gin-goniccom/path", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path/", header{Key: "X-Forwarded-Prefix", Value: "#api"})
+	assert.Equal(t, "api/api/path", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path/", header{Key: "X-Forwarded-Prefix", Value: "/nor-mal/#?a=1"})
+	assert.Equal(t, "/nor-mal/a1/path", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
+
+	w = PerformRequest(router, http.MethodGet, "/path/", header{Key: "X-Forwarded-Prefix", Value: "/nor-mal/%2e%2e/"})
+	assert.Equal(t, "/nor-mal/2e2e/path", w.Header().Get("Location"))
+	assert.Equal(t, http.StatusMovedPermanently, w.Code)
 
 	router.RedirectTrailingSlash = false
 
@@ -289,6 +337,45 @@ func TestRouteParamsByNameWithExtraSlash(t *testing.T) {
 	assert.Equal(t, "/is/super/great", wild)
 }
 
+// TestRouteParamsNotEmpty tests that context parameters will be set
+// even if a route with params/wildcards is registered after the context
+// initialisation (which happened in a previous requests).
+func TestRouteParamsNotEmpty(t *testing.T) {
+	name := ""
+	lastName := ""
+	wild := ""
+	router := New()
+
+	w := PerformRequest(router, http.MethodGet, "/test/john/smith/is/super/great")
+
+	assert.Equal(t, http.StatusNotFound, w.Code)
+
+	router.GET("/test/:name/:last_name/*wild", func(c *Context) {
+		name = c.Params.ByName("name")
+		lastName = c.Params.ByName("last_name")
+		var ok bool
+		wild, ok = c.Params.Get("wild")
+
+		assert.True(t, ok)
+		assert.Equal(t, name, c.Param("name"))
+		assert.Equal(t, lastName, c.Param("last_name"))
+
+		assert.Empty(t, c.Param("wtf"))
+		assert.Empty(t, c.Params.ByName("wtf"))
+
+		wtf, ok := c.Params.Get("wtf")
+		assert.Empty(t, wtf)
+		assert.False(t, ok)
+	})
+
+	w = PerformRequest(router, http.MethodGet, "/test/john/smith/is/super/great")
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Equal(t, "john", name)
+	assert.Equal(t, "smith", lastName)
+	assert.Equal(t, "/is/super/great", wild)
+}
+
 // TestHandleStaticFile - ensure the static file handles properly
 func TestRouteStaticFile(t *testing.T) {
 	// SETUP file
@@ -427,6 +514,18 @@ func TestRouteNotAllowedEnabled2(t *testing.T) {
 	assert.Equal(t, http.StatusMethodNotAllowed, w.Code)
 }
 
+func TestRouteNotAllowedEnabled3(t *testing.T) {
+	router := New()
+	router.HandleMethodNotAllowed = true
+	router.GET("/path", func(c *Context) {})
+	router.POST("/path", func(c *Context) {})
+	w := PerformRequest(router, http.MethodPut, "/path")
+	assert.Equal(t, http.StatusMethodNotAllowed, w.Code)
+	allowed := w.Header().Get("Allow")
+	assert.Contains(t, allowed, "GET")
+	assert.Contains(t, allowed, "POST")
+}
+
 func TestRouteNotAllowedDisabled(t *testing.T) {
 	router := New()
 	router.HandleMethodNotAllowed = false
@@ -520,11 +619,11 @@ func TestRouterNotFound(t *testing.T) {
 	router = New()
 	router.NoRoute(func(c *Context) {
 		if c.Request.RequestURI == "/login" {
-			c.String(200, "login")
+			c.String(http.StatusOK, "login")
 		}
 	})
 	router.GET("/logout", func(c *Context) {
-		c.String(200, "logout")
+		c.String(http.StatusOK, "logout")
 	})
 	w = PerformRequest(router, http.MethodGet, "/login")
 	assert.Equal(t, "login", w.Body.String())
@@ -536,7 +635,7 @@ func TestRouterStaticFSNotFound(t *testing.T) {
 	router := New()
 	router.StaticFS("/", http.FileSystem(http.Dir("/thisreallydoesntexist/")))
 	router.NoRoute(func(c *Context) {
-		c.String(404, "non existent")
+		c.String(http.StatusNotFound, "non existent")
 	})
 
 	w := PerformRequest(router, http.MethodGet, "/nonexistent")
@@ -619,12 +718,12 @@ func TestRouteRawPathNoUnescape(t *testing.T) {
 func TestRouteServeErrorWithWriteHeader(t *testing.T) {
 	route := New()
 	route.Use(func(c *Context) {
-		c.Status(421)
+		c.Status(http.StatusMisdirectedRequest)
 		c.Next()
 	})
 
 	w := PerformRequest(route, http.MethodGet, "/NotFound")
-	assert.Equal(t, 421, w.Code)
+	assert.Equal(t, http.StatusMisdirectedRequest, w.Code)
 	assert.Equal(t, 0, w.Body.Len())
 }
 
diff --git a/testdata/protoexample/any.go b/testdata/protoexample/any.go
deleted file mode 100644
index 2203f33a32..0000000000
--- a/testdata/protoexample/any.go
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright 2021 Gin Core Team. All rights reserved.
-// Use of this source code is governed by a MIT style
-// license that can be found in the LICENSE file.
-
-//go:build !go1.18
-// +build !go1.18
-
-package protoexample
-
-type any = interface{}
diff --git a/tree.go b/tree.go
index dda8f4f7b0..878023d1cf 100644
--- a/tree.go
+++ b/tree.go
@@ -351,7 +351,10 @@ func (n *node) insertChild(path string, fullPath string, handlers HandlersChain)
 		}
 
 		if len(n.path) > 0 && n.path[len(n.path)-1] == '/' {
-			pathSeg := strings.SplitN(n.children[0].path, "/", 2)[0]
+			pathSeg := ""
+			if len(n.children) != 0 {
+				pathSeg = strings.SplitN(n.children[0].path, "/", 2)[0]
+			}
 			panic("catch-all wildcard '" + path +
 				"' in new path '" + fullPath +
 				"' conflicts with existing path segment '" + pathSeg +
@@ -478,7 +481,7 @@ walk: // Outer loop for walking the tree
 					// We can recommend to redirect to the same URL without a
 					// trailing slash if a leaf exists for that path.
 					value.tsr = path == "/" && n.handlers != nil
-					return
+					return value
 				}
 
 				// Handle wildcard child, which is always at the end of the array
@@ -497,7 +500,14 @@ walk: // Outer loop for walking the tree
 					}
 
 					// Save param value
-					if params != nil && cap(*params) > 0 {
+					if params != nil {
+						// Preallocate capacity if necessary
+						if cap(*params) < int(globalParamsCount) {
+							newParams := make(Params, len(*params), globalParamsCount)
+							copy(newParams, *params)
+							*params = newParams
+						}
+
 						if value.params == nil {
 							value.params = params
 						}
@@ -526,12 +536,12 @@ walk: // Outer loop for walking the tree
 
 						// ... but we can't
 						value.tsr = len(path) == end+1
-						return
+						return value
 					}
 
 					if value.handlers = n.handlers; value.handlers != nil {
 						value.fullPath = n.fullPath
-						return
+						return value
 					}
 					if len(n.children) == 1 {
 						// No handle found. Check if a handle for this path + a
@@ -539,11 +549,18 @@ walk: // Outer loop for walking the tree
 						n = n.children[0]
 						value.tsr = (n.path == "/" && n.handlers != nil) || (n.path == "" && n.indices == "/")
 					}
-					return
+					return value
 
 				case catchAll:
 					// Save param value
 					if params != nil {
+						// Preallocate capacity if necessary
+						if cap(*params) < int(globalParamsCount) {
+							newParams := make(Params, len(*params), globalParamsCount)
+							copy(newParams, *params)
+							*params = newParams
+						}
+
 						if value.params == nil {
 							value.params = params
 						}
@@ -564,7 +581,7 @@ walk: // Outer loop for walking the tree
 
 					value.handlers = n.handlers
 					value.fullPath = n.fullPath
-					return
+					return value
 
 				default:
 					panic("invalid node type")
@@ -595,7 +612,7 @@ walk: // Outer loop for walking the tree
 			// Check if this node has a handle registered.
 			if value.handlers = n.handlers; value.handlers != nil {
 				value.fullPath = n.fullPath
-				return
+				return value
 			}
 
 			// If there is no handle for this route, but this route has a
@@ -603,12 +620,12 @@ walk: // Outer loop for walking the tree
 			// additional trailing slash
 			if path == "/" && n.wildChild && n.nType != root {
 				value.tsr = true
-				return
+				return value
 			}
 
 			if path == "/" && n.nType == static {
 				value.tsr = true
-				return
+				return value
 			}
 
 			// No handle found. Check if a handle for this path + a
@@ -618,11 +635,11 @@ walk: // Outer loop for walking the tree
 					n = n.children[i]
 					value.tsr = (len(n.path) == 1 && n.handlers != nil) ||
 						(n.nType == catchAll && n.children[0].handlers != nil)
-					return
+					return value
 				}
 			}
 
-			return
+			return value
 		}
 
 		// Nothing found. We can recommend to redirect to the same URL with an
@@ -648,7 +665,7 @@ walk: // Outer loop for walking the tree
 			}
 		}
 
-		return
+		return value
 	}
 }
 
diff --git a/tree_test.go b/tree_test.go
index 2005738ec6..c9b03130b6 100644
--- a/tree_test.go
+++ b/tree_test.go
@@ -417,6 +417,8 @@ func TestTreeWildcardConflict(t *testing.T) {
 		{"/user_:name", false},
 		{"/id:id", false},
 		{"/id/:id", false},
+		{"/static/*file", false},
+		{"/static/", true},
 	}
 	testRoutes(t, routes)
 }
@@ -893,9 +895,9 @@ func TestTreeInvalidNodeType(t *testing.T) {
 
 func TestTreeInvalidParamsType(t *testing.T) {
 	tree := &node{}
-	tree.wildChild = true
-	tree.children = append(tree.children, &node{})
-	tree.children[0].nType = 2
+	// add a child with wildcard
+	route := "/:path"
+	tree.addRoute(route, fakeHandler(route))
 
 	// set invalid Params type
 	params := make(Params, 0)
@@ -904,6 +906,34 @@ func TestTreeInvalidParamsType(t *testing.T) {
 	tree.getValue("/test", &params, getSkippedNodes(), false)
 }
 
+func TestTreeExpandParamsCapacity(t *testing.T) {
+	data := []struct {
+		path string
+	}{
+		{"/:path"},
+		{"/*path"},
+	}
+
+	for _, item := range data {
+		tree := &node{}
+		tree.addRoute(item.path, fakeHandler(item.path))
+		params := make(Params, 0)
+
+		value := tree.getValue("/test", &params, getSkippedNodes(), false)
+
+		if value.params == nil {
+			t.Errorf("Expected %s params to be set, but they weren't", item.path)
+			continue
+		}
+
+		if len(*value.params) != 1 {
+			t.Errorf("Wrong number of %s params: got %d, want %d",
+				item.path, len(*value.params), 1)
+			continue
+		}
+	}
+}
+
 func TestTreeWildcardConflictEx(t *testing.T) {
 	conflicts := [...]struct {
 		route        string
diff --git a/utils.go b/utils.go
index 4021a2ab40..47106a7aea 100644
--- a/utils.go
+++ b/utils.go
@@ -50,7 +50,7 @@ func WrapH(h http.Handler) HandlerFunc {
 	}
 }
 
-// H is a shortcut for map[string]interface{}
+// H is a shortcut for map[string]any
 type H map[string]any
 
 // MarshalXML allows type H to be used with xml.Marshal.
diff --git a/version.go b/version.go
index 37e27f27a5..85462e5553 100644
--- a/version.go
+++ b/version.go
@@ -5,4 +5,4 @@
 package gin
 
 // Version is the current gin framework's version.
-const Version = "v1.8.2"
+const Version = "v1.9.1"