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resolver: delete Target.Scheme and Target.Authority (#6363)
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* Delete resolver.Target.Scheme and resolver.Target.Authority

* cleanup - wrap block comments @ 80 columns
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@ginayeh
ginayeh committed Jul 5, 2023
1 parent df3e021 commit 11feb0a
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Showing 7 changed files with 71 additions and 121 deletions.
10 changes: 3 additions & 7 deletions clientconn.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1807,19 +1807,15 @@ func (cc *ClientConn) parseTargetAndFindResolver() error {
}

// parseTarget uses RFC 3986 semantics to parse the given target into a
// resolver.Target struct containing scheme, authority and url. Query
// params are stripped from the endpoint.
// resolver.Target struct containing url. Query params are stripped from the
// endpoint.
func parseTarget(target string) (resolver.Target, error) {
u, err := url.Parse(target)
if err != nil {
return resolver.Target{}, err
}

return resolver.Target{
Scheme: u.Scheme,
Authority: u.Host,
URL: *u,
}, nil
return resolver.Target{URL: *u}, nil
}

// Determine channel authority. The order of precedence is as follows:
Expand Down
91 changes: 20 additions & 71 deletions clientconn_parsed_target_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,6 @@ import (
"errors"
"fmt"
"net"
"net/url"
"testing"
"time"

Expand All @@ -38,64 +37,29 @@ func (s) TestParsedTarget_Success_WithoutCustomDialer(t *testing.T) {
defScheme := resolver.GetDefaultScheme()
tests := []struct {
target string
badScheme bool
wantParsed resolver.Target
}{
// No scheme is specified.
{target: "://", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "://"))}},
{target: ":///", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ":///"))}},
{target: "://a/", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "://a/"))}},
{target: ":///a", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ":///a"))}},
{target: "://a/b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "://a/b"))}},
{target: "/", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "/"))}},
{target: "a/b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a/b"))}},
{target: "a//b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a//b"))}},
{target: "google.com", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "google.com"))}},
{target: "google.com/?a=b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "google.com/?a=b"))}},
{target: "/unix/socket/address", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "/unix/socket/address"))}},
{target: "://a/b", wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "://a/b"))}},
{target: "a//b", wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a//b"))}},

// An unregistered scheme is specified.
{target: "a:///", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a:///"))}},
{target: "a://b/", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a://b/"))}},
{target: "a:///b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a:///b"))}},
{target: "a://b/c", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a://b/c"))}},
{target: "a:b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a:b"))}},
{target: "a:/b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a:/b"))}},
{target: "a://b", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a://b"))}},
{target: "a:///", wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a:///"))}},
{target: "a:b", wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "a:b"))}},

// A registered scheme is specified.
{target: "dns:///google.com", wantParsed: resolver.Target{Scheme: "dns", Authority: "", URL: *testutils.MustParseURL("dns:///google.com")}},
{target: "dns://a.server.com/google.com", wantParsed: resolver.Target{Scheme: "dns", Authority: "a.server.com", URL: *testutils.MustParseURL("dns://a.server.com/google.com")}},
{target: "dns://a.server.com/google.com/?a=b", wantParsed: resolver.Target{Scheme: "dns", Authority: "a.server.com", URL: *testutils.MustParseURL("dns://a.server.com/google.com/?a=b")}},
{target: "unix:///a/b/c", wantParsed: resolver.Target{Scheme: "unix", Authority: "", URL: *testutils.MustParseURL("unix:///a/b/c")}},
{target: "unix-abstract:a/b/c", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:a/b/c")}},
{target: "unix-abstract:a b", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:a b")}},
{target: "unix-abstract:a:b", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:a:b")}},
{target: "unix-abstract:a-b", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:a-b")}},
{target: "unix-abstract:/ a///://::!@#$%25^&*()b", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:/ a///://::!@#$%25^&*()b")}},
{target: "unix-abstract:passthrough:abc", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:passthrough:abc")}},
{target: "unix-abstract:unix:///abc", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:unix:///abc")}},
{target: "unix-abstract:///a/b/c", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:///a/b/c")}},
{target: "unix-abstract:///", wantParsed: resolver.Target{Scheme: "unix-abstract", Authority: "", URL: *testutils.MustParseURL("unix-abstract:///")}},
{target: "passthrough:///unix:///a/b/c", wantParsed: resolver.Target{Scheme: "passthrough", Authority: "", URL: *testutils.MustParseURL("passthrough:///unix:///a/b/c")}},
{target: "dns://a.server.com/google.com", wantParsed: resolver.Target{URL: *testutils.MustParseURL("dns://a.server.com/google.com")}},
{target: "unix-abstract:/ a///://::!@#$%25^&*()b", wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix-abstract:/ a///://::!@#$%25^&*()b")}},
{target: "unix-abstract:passthrough:abc", wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix-abstract:passthrough:abc")}},
{target: "passthrough:///unix:///a/b/c", wantParsed: resolver.Target{URL: *testutils.MustParseURL("passthrough:///unix:///a/b/c")}},

// Cases for `scheme:absolute-path`.
{target: "dns:/a/b/c", wantParsed: resolver.Target{Scheme: "dns", Authority: "", URL: *testutils.MustParseURL("dns:/a/b/c")}},
{target: "unregistered:/a/b/c", badScheme: true, wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL("unregistered:/a/b/c")}},
{target: "dns:/a/b/c", wantParsed: resolver.Target{URL: *testutils.MustParseURL("dns:/a/b/c")}},
{target: "unregistered:/a/b/c", wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "unregistered:/a/b/c"))}},
}

for _, test := range tests {
t.Run(test.target, func(t *testing.T) {
target := test.target
if test.badScheme {
target = defScheme + ":///" + target
}
url, err := url.Parse(target)
if err != nil {
t.Fatalf("Unexpected error parsing URL: %v", err)
}
test.wantParsed.URL = *url

cc, err := Dial(test.target, WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
t.Fatalf("Dial(%q) failed: %v", test.target, err)
Expand Down Expand Up @@ -132,80 +96,65 @@ func (s) TestParsedTarget_WithCustomDialer(t *testing.T) {
defScheme := resolver.GetDefaultScheme()
tests := []struct {
target string
badScheme bool
wantParsed resolver.Target
wantDialerAddress string
}{
// unix:[local_path], unix:[/absolute], and unix://[/absolute] have
// different behaviors with a custom dialer.
{
target: "unix:a/b/c",
wantParsed: resolver.Target{Scheme: "unix", Authority: "", URL: *testutils.MustParseURL("unix:a/b/c")},
wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:a/b/c")},
wantDialerAddress: "unix:a/b/c",
},
{
target: "unix:/a/b/c",
wantParsed: resolver.Target{Scheme: "unix", Authority: "", URL: *testutils.MustParseURL("unix:/a/b/c")},
wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:/a/b/c")},
wantDialerAddress: "unix:///a/b/c",
},
{
target: "unix:///a/b/c",
wantParsed: resolver.Target{Scheme: "unix", Authority: "", URL: *testutils.MustParseURL("unix:///a/b/c")},
wantParsed: resolver.Target{URL: *testutils.MustParseURL("unix:///a/b/c")},
wantDialerAddress: "unix:///a/b/c",
},
{
target: "dns:///127.0.0.1:50051",
wantParsed: resolver.Target{Scheme: "dns", Authority: "", URL: *testutils.MustParseURL("dns:///127.0.0.1:50051")},
wantParsed: resolver.Target{URL: *testutils.MustParseURL("dns:///127.0.0.1:50051")},
wantDialerAddress: "127.0.0.1:50051",
},
{
target: ":///127.0.0.1:50051",
badScheme: true,
wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ":///127.0.0.1:50051"))},
wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ":///127.0.0.1:50051"))},
wantDialerAddress: ":///127.0.0.1:50051",
},
{
target: "dns://authority/127.0.0.1:50051",
wantParsed: resolver.Target{Scheme: "dns", Authority: "authority", URL: *testutils.MustParseURL("dns://authority/127.0.0.1:50051")},
wantParsed: resolver.Target{URL: *testutils.MustParseURL("dns://authority/127.0.0.1:50051")},
wantDialerAddress: "127.0.0.1:50051",
},
{
target: "://authority/127.0.0.1:50051",
badScheme: true,
wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "://authority/127.0.0.1:50051"))},
wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "://authority/127.0.0.1:50051"))},
wantDialerAddress: "://authority/127.0.0.1:50051",
},
{
target: "/unix/socket/address",
badScheme: true,
wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "/unix/socket/address"))},
wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, "/unix/socket/address"))},
wantDialerAddress: "/unix/socket/address",
},
{
target: "",
badScheme: true,
wantParsed: resolver.Target{Scheme: defScheme, Authority: "", URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ""))},
wantParsed: resolver.Target{URL: *testutils.MustParseURL(fmt.Sprintf("%s:///%s", defScheme, ""))},
wantDialerAddress: "",
},
{
target: "passthrough://a.server.com/google.com",
wantParsed: resolver.Target{Scheme: "passthrough", Authority: "a.server.com", URL: *testutils.MustParseURL("passthrough://a.server.com/google.com")},
wantParsed: resolver.Target{URL: *testutils.MustParseURL("passthrough://a.server.com/google.com")},
wantDialerAddress: "google.com",
},
}

for _, test := range tests {
t.Run(test.target, func(t *testing.T) {
target := test.target
if test.badScheme {
target = defScheme + ":///" + target
}
url, err := url.Parse(target)
if err != nil {
t.Fatalf("Unexpected error parsing URL: %v", err)
}
test.wantParsed.URL = *url

addrCh := make(chan string, 1)
dialer := func(ctx context.Context, address string) (net.Conn, error) {
addrCh <- address
Expand Down

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