Integrate hyper_serde into Servo source (#30803)

hyper_serde changes very infrequently and typically only in order to
upgrade Servo dependencies. crates.io lists hyper_serde as having no
dependents, and its integration will not prevent releasing new versions.
Integrating it will both reduce the number of repositories we have to
maintain as well as making it easier to upgrade Servo dependencies.

components/hyper_serde/tests/supported.rs

@@ -0,0 +1,38 @@
+// Copyright 2023 The Servo Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use cookie::Cookie;
+use headers::ContentType;
+use http::header::HeaderMap;
+use hyper::{Method, StatusCode, Uri};
+use hyper_serde::{De, Ser, Serde};
+use mime::Mime;
+use serde::{Deserialize, Serialize};
+use time::Tm;
+
+fn is_supported<T>()
+where
+    for<'de> De<T>: Deserialize<'de>,
+    for<'a> Ser<'a, T>: Serialize,
+    for<'de> Serde<T>: Deserialize<'de> + Serialize,
+{
+}
+
+#[test]
+fn supported() {
+    is_supported::<Cookie>();
+    is_supported::<ContentType>();
+    is_supported::<HeaderMap>();
+    is_supported::<Method>();
+    is_supported::<Mime>();
+    is_supported::<StatusCode>();
+    is_supported::<Tm>();
+    is_supported::<Uri>();
+}

components/hyper_serde/tests/tokens.rs

@@ -0,0 +1,136 @@
+// Copyright 2023 The Servo Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use cookie::Cookie;
+use headers::ContentType;
+use http::header::{self, HeaderMap, HeaderValue};
+use http::StatusCode;
+use hyper::{Method, Uri};
+use hyper_serde::{De, Ser};
+use serde_test::{assert_de_tokens, assert_ser_tokens, Token};
+use time::Duration;
+
+#[test]
+fn test_content_type() {
+    let content_type = ContentType::from("Application/Json".parse::<mime::Mime>().unwrap());
+    let tokens = &[Token::Str("application/json")];
+
+    assert_ser_tokens(&Ser::new(&content_type), tokens);
+    assert_de_tokens(&De::new(content_type), tokens);
+}
+
+#[test]
+fn test_cookie() {
+    // Unfortunately we have to do the to_string().parse() dance here to avoid the object being a
+    // string with a bunch of indices in it which apparently is different from the exact same
+    // cookie but parsed as a bunch of strings.
+    let cookie: Cookie = Cookie::build("Hello", "World!")
+        .max_age(Duration::seconds(42))
+        .domain("servo.org")
+        .path("/")
+        .secure(true)
+        .http_only(false)
+        .finish()
+        .to_string()
+        .parse()
+        .unwrap();
+
+    let tokens = &[Token::Str(
+        "Hello=World!; Secure; Path=/; Domain=servo.org; Max-Age=42",
+    )];
+
+    assert_ser_tokens(&Ser::new(&cookie), tokens);
+    assert_de_tokens(&De::new(cookie), tokens);
+}
+
+#[test]
+fn test_headers_empty() {
+    let headers = HeaderMap::new();
+
+    let tokens = &[Token::Map { len: Some(0) }, Token::MapEnd];
+
+    assert_ser_tokens(&Ser::new(&headers), tokens);
+    assert_de_tokens(&De::new(headers), tokens);
+}
+
+#[test]
+fn test_headers_not_empty() {
+    let mut headers = HeaderMap::new();
+    headers.insert(header::HOST, HeaderValue::from_static("baguette"));
+
+    // In http, HeaderMap is internally a HashMap and thus testing this
+    // with multiple headers is non-deterministic.
+
+    let tokens = &[
+        Token::Map { len: Some(1) },
+        Token::Str("host"),
+        Token::Seq { len: Some(1) },
+        Token::Bytes(b"baguette"),
+        Token::SeqEnd,
+        Token::MapEnd,
+    ];
+
+    assert_ser_tokens(&Ser::new(&headers), tokens);
+    assert_de_tokens(&De::new(headers.clone()), tokens);
+
+    let pretty = &[
+        Token::Map { len: Some(1) },
+        Token::Str("host"),
+        Token::Seq { len: Some(1) },
+        Token::Str("baguette"),
+        Token::SeqEnd,
+        Token::MapEnd,
+    ];
+
+    assert_ser_tokens(&Ser::new_pretty(&headers), pretty);
+    assert_de_tokens(&De::new(headers), pretty);
+}
+
+#[test]
+fn test_method() {
+    let method = Method::PUT;
+    let tokens = &[Token::Str("PUT")];
+
+    assert_ser_tokens(&Ser::new(&method), tokens);
+    assert_de_tokens(&De::new(method), tokens);
+}
+
+#[test]
+fn test_raw_status() {
+    let raw_status = StatusCode::from_u16(200).unwrap();
+    let tokens = &[Token::U16(200)];
+
+    assert_ser_tokens(&Ser::new(&raw_status), tokens);
+    assert_de_tokens(&De::new(raw_status), tokens);
+}
+
+#[test]
+fn test_tm() {
+    use time::strptime;
+
+    let time = strptime("2017-02-22T12:03:31Z", "%Y-%m-%dT%H:%M:%SZ").unwrap();
+    let tokens = &[Token::Str("2017-02-22T12:03:31Z")];
+
+    assert_ser_tokens(&Ser::new(&time), tokens);
+    assert_de_tokens(&De::new(time), tokens);
+}
+
+#[test]
+fn test_uri() {
+    use std::str::FromStr;
+
+    // Note that fragment is not serialized / deserialized
+    let uri_string = "abc://username:password@example.com:123/path/data?key=value&key2=value2";
+    let uri = Uri::from_str(uri_string).unwrap();
+    let tokens = &[Token::Str(uri_string)];
+
+    assert_ser_tokens(&Ser::new(&uri), tokens);
+    assert_de_tokens(&De::new(uri), tokens);
+}