Auto merge of #14716 - mrnayak:hsts, r=jdm

Implement HSTS fetch step

Implemented step nine of the main fetch. If current URL scheme is 'HTTP' and
current URL's host is domain and if current URL's host matched with Known
HSTS Host Domain Name Matching results in either a superdomain match with
an asserted includeSubDomains directive or a congruent match then we
change request scheme to 'https'. This change has been made in method.rs

A test case to validate this has been added in fetch.rs. For asserting
https scheme, a https localhost was required. For this purpose I have
created a self-signed certificate and refactored fetch-context and
connector.rs to programmatically trust this certificate for running this
test case.

This should fix https://github.com/servo/servo/issues/14363
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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #14363

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- [X] There are tests for these changes

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tests/unit/net/fetch.rs

@@ -18,11 +18,17 @@ use hyper::header::{Encoding, Location, Pragma, Quality, QualityItem, SetCookie,
 use hyper::header::{Headers, Host, HttpDate, Referer as HyperReferer};
 use hyper::method::Method;
 use hyper::mime::{Mime, SubLevel, TopLevel};
-use hyper::server::{Request as HyperRequest, Response as HyperResponse};
+use hyper::net::Openssl;
+use hyper::server::{Request as HyperRequest, Response as HyperResponse, Server};
 use hyper::status::StatusCode;
 use hyper::uri::RequestUri;
 use msg::constellation_msg::TEST_PIPELINE_ID;
 use net::fetch::cors_cache::CorsCache;
+use net::fetch::methods::FetchContext;
+use net::filemanager_thread::FileManager;
+use net::hsts::HstsEntry;
+use net::test::HttpState;
+use net_traits::IncludeSubdomains;
 use net_traits::NetworkError;
 use net_traits::ReferrerPolicy;
 use net_traits::request::{Origin, RedirectMode, Referrer, Request, RequestMode};
@@ -506,6 +512,50 @@ fn test_fetch_with_local_urls_only() {
     assert!(server_response.is_network_error());
 }
 
+#[test]
+fn test_fetch_with_hsts() {
+    static MESSAGE: &'static [u8] = b"";
+    let handler = move |_: HyperRequest, response: HyperResponse| {
+        response.send(MESSAGE).unwrap();
+    };
+
+    let path = resources_dir_path().expect("Cannot find resource dir");
+    let mut cert_path = path.clone();
+    cert_path.push("self_signed_certificate_for_testing.crt");
+
+    let mut key_path = path.clone();
+    key_path.push("privatekey_for_testing.key");
+
+    let ssl = Openssl::with_cert_and_key(cert_path.into_os_string(), key_path.into_os_string())
+        .unwrap();
+
+    let mut server = Server::https("0.0.0.0:0", ssl).unwrap().handle_threads(handler, 1).unwrap();
+
+    let context =  FetchContext {
+        state: HttpState::new("self_signed_certificate_for_testing.crt"),
+        user_agent: DEFAULT_USER_AGENT.into(),
+        devtools_chan: None,
+        filemanager: FileManager::new(),
+    };
+
+    {
+        let mut list = context.state.hsts_list.write().unwrap();
+        list.push(HstsEntry::new("localhost".to_owned(), IncludeSubdomains::NotIncluded, None)
+            .unwrap());
+    }
+    let url_string = format!("http://localhost:{}", server.socket.port());
+    let url = ServoUrl::parse(&url_string).unwrap();
+    let origin = Origin::Origin(url.origin());
+    let mut request = Request::new(url, Some(origin), false, None);
+    *request.referrer.borrow_mut() = Referrer::NoReferrer;
+    // Set the flag.
+    request.local_urls_only = false;
+    let response = fetch_with_context(request, &context);
+    let _ = server.close();
+    assert_eq!(response.internal_response.unwrap().url().unwrap().scheme(),
+               "https");
+}
+
 fn setup_server_and_fetch(message: &'static [u8], redirect_cap: u32) -> Response {
     let handler = move |request: HyperRequest, mut response: HyperResponse| {
         let redirects = match request.uri {

tests/unit/net/lib.rs

@@ -55,7 +55,7 @@ struct FetchResponseCollector {
 
 fn new_fetch_context(dc: Option<Sender<DevtoolsControlMsg>>) -> FetchContext {
     FetchContext {
-        state: HttpState::new(),
+        state: HttpState::new("certs"),
         user_agent: DEFAULT_USER_AGENT.into(),
         devtools_chan: dc,
         filemanager: FileManager::new(),