Update base64 to 0.21

Also added once_cell for caching the new Engine based APIs of base64

Signed-off-by: Ayush Singh <ayushsingh1325@gmail.com>

Cargo.toml

@@ -19,12 +19,13 @@ members = [
 [dependencies]
 http = "0.2.0"
 headers-core = { version = "0.2", path = "./headers-core" }
-base64 = "0.13"
+base64 = "0.21"
 bitflags = "1.0"
 bytes = "1"
 mime = "0.3.14"
 sha1 = "0.10"
 httpdate = "1"
+once_cell = "1.17.0"
 
 [features]
 nightly = []

src/common/authorization.rs

@@ -1,6 +1,7 @@
 //! Authorization header and types.
 
-use base64;
+use super::engine;
+use base64::Engine;
 use bytes::Bytes;
 
 use util::HeaderValueString;
@@ -158,7 +159,8 @@ impl Credentials for Basic {
         let bytes = &value.as_bytes()["Basic ".len()..];
         let non_space_pos = bytes.iter().position(|b| *b != b' ')?;
         let bytes = &bytes[non_space_pos..];
-        let bytes = base64::decode(bytes).ok()?;
+
+        let bytes = engine().decode(bytes).ok()?;
 
         let decoded = String::from_utf8(bytes).ok()?;
 
@@ -169,7 +171,7 @@ impl Credentials for Basic {
 
     fn encode(&self) -> HeaderValue {
         let mut encoded = String::from("Basic ");
-        base64::encode_config_buf(&self.decoded, base64::STANDARD, &mut encoded);
+        engine().encode_string(&self.decoded, &mut encoded);
 
         let bytes = Bytes::from(encoded);
         HeaderValue::from_maybe_shared(bytes)

src/common/mod.rs

@@ -188,3 +188,10 @@ mod upgrade;
 mod user_agent;
 mod vary;
 //mod warning;
+
+fn engine() -> &'static base64::engine::GeneralPurpose {
+    static ENGINE: once_cell::sync::OnceCell<base64::engine::GeneralPurpose> =
+        once_cell::sync::OnceCell::new();
+
+    ENGINE.get_or_init(|| base64::engine::general_purpose::STANDARD)
+}

src/common/sec_websocket_accept.rs

@@ -1,8 +1,8 @@
-use base64;
+use base64::Engine;
 use bytes::Bytes;
 use sha1::{Digest, Sha1};
 
-use super::SecWebsocketKey;
+use super::{engine, SecWebsocketKey};
 
 /// The `Sec-Websocket-Accept` header.
 ///
@@ -39,7 +39,7 @@ fn sign(key: &[u8]) -> SecWebsocketAccept {
     let mut sha1 = Sha1::default();
     sha1.update(key);
     sha1.update(&b"258EAFA5-E914-47DA-95CA-C5AB0DC85B11"[..]);
-    let b64 = Bytes::from(base64::encode(&sha1.finalize()));
+    let b64 = Bytes::from(engine().encode(&sha1.finalize()));
 
     let val = ::HeaderValue::from_maybe_shared(b64).expect("base64 is a valid value");
 

src/lib.rs

@@ -80,6 +80,7 @@ extern crate headers_core;
 extern crate http;
 extern crate httpdate;
 extern crate mime;
+extern crate once_cell;
 extern crate sha1;
 #[cfg(all(test, feature = "nightly"))]
 extern crate test;