Add referrer policy pass-through and referrer header logic

add pass-through from doc to http-loader for referrer_policy, ref_URL
add logic for setting referer header
add script pass-through for referrer
add unit tests for setting referer header
This commit is contained in:
Rebecca 2016-04-05 13:08:45 -04:00
parent 78041737de
commit 526525b835
19 changed files with 369 additions and 68 deletions

View file

@ -24,7 +24,7 @@ fn assert_parse(url: &'static str,
let (start_chan, start_port) = ipc::channel().unwrap();
let classifier = Arc::new(MIMEClassifier::new());
load(LoadData::new(LoadContext::Browsing, Url::parse(url).unwrap(), None),
load(LoadData::new(LoadContext::Browsing, Url::parse(url).unwrap(), None, None, None),
Channel(start_chan),
classifier, CancellationListener::new(None));

View file

@ -10,13 +10,13 @@ use flate2::Compression;
use flate2::write::{GzEncoder, DeflateEncoder};
use hyper::header::{Accept, AcceptEncoding, ContentEncoding, ContentLength, Cookie as CookieHeader};
use hyper::header::{Authorization, Basic};
use hyper::header::{Encoding, Headers, Host, Location, Quality, QualityItem, qitem, SetCookie};
use hyper::header::{Encoding, Headers, Host, Location, Quality, QualityItem, qitem, Referer, SetCookie};
use hyper::header::{StrictTransportSecurity, UserAgent};
use hyper::http::RawStatus;
use hyper::method::Method;
use hyper::mime::{Mime, SubLevel, TopLevel};
use hyper::status::StatusCode;
use msg::constellation_msg::PipelineId;
use msg::constellation_msg::{PipelineId, ReferrerPolicy};
use net::cookie::Cookie;
use net::cookie_storage::CookieStorage;
use net::hsts::HstsEntry;
@ -328,7 +328,7 @@ fn test_check_default_headers_loaded_in_every_request() {
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = None;
load_data.method = Method::Get;
@ -372,7 +372,7 @@ fn test_load_when_request_is_not_get_or_head_and_there_is_no_body_content_length
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = None;
load_data.method = Method::Post;
@ -410,7 +410,7 @@ fn test_request_and_response_data_with_network_messages() {
let (devtools_chan, devtools_port) = mpsc::channel::<DevtoolsControlMsg>();
// This will probably have to be changed as it uses fake_root_pipeline_id which is marked for removal.
let pipeline_id = PipelineId::fake_root_pipeline_id();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), Some(pipeline_id));
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), Some(pipeline_id), None, None);
let mut request_headers = Headers::new();
request_headers.set(Host { hostname: "bar.foo".to_owned(), port: None });
load_data.headers = request_headers.clone();
@ -483,7 +483,7 @@ fn test_request_and_response_message_from_devtool_without_pipeline_id() {
let url = Url::parse("https://mozilla.com").unwrap();
let (devtools_chan, devtools_port) = mpsc::channel::<DevtoolsControlMsg>();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let _ = load(&load_data, &ui_provider, &http_state, Some(devtools_chan), &Factory,
DEFAULT_USER_AGENT.to_owned(), &CancellationListener::new(None));
@ -512,7 +512,8 @@ fn test_load_when_redirecting_from_a_post_should_rewrite_next_request_as_get() {
}
let url = Url::parse("http://mozilla.com").unwrap();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.method = Method::Post;
let http_state = HttpState::new();
@ -541,7 +542,7 @@ fn test_load_should_decode_the_response_as_deflate_when_response_headers_have_co
}
let url = Url::parse("http://mozilla.com").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -575,7 +576,8 @@ fn test_load_should_decode_the_response_as_gzip_when_response_headers_have_conte
}
let url = Url::parse("http://mozilla.com").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -617,7 +619,8 @@ fn test_load_doesnt_send_request_body_on_any_redirect() {
}
let url = Url::parse("http://mozilla.com").unwrap();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = Some(<[_]>::to_vec("Body on POST!".as_bytes()));
let http_state = HttpState::new();
@ -648,7 +651,7 @@ fn test_load_doesnt_add_host_to_sts_list_when_url_is_http_even_if_sts_headers_ar
let url = Url::parse("http://mozilla.com").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -680,7 +683,7 @@ fn test_load_adds_host_to_sts_list_when_url_is_https_and_sts_headers_are_present
let url = Url::parse("https://mozilla.com").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -717,7 +720,7 @@ fn test_load_sets_cookies_in_the_resource_manager_when_it_get_set_cookie_header_
assert_cookie_for_domain(http_state.cookie_jar.clone(), "http://mozilla.com", "");
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let _ = load(&load_data,
&ui_provider, &http_state,
@ -733,7 +736,7 @@ fn test_load_sets_cookies_in_the_resource_manager_when_it_get_set_cookie_header_
fn test_load_sets_requests_cookies_header_for_url_by_getting_cookies_from_the_resource_manager() {
let url = Url::parse("http://mozilla.com").unwrap();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = Some(<[_]>::to_vec("Yay!".as_bytes()));
let http_state = HttpState::new();
@ -789,7 +792,7 @@ fn test_load_sends_secure_cookie_if_http_changed_to_https_due_to_entry_in_hsts_s
cookie_jar.push(cookie, CookieSource::HTTP);
}
let mut load_data = LoadData::new(LoadContext::Browsing, url, None);
let mut load_data = LoadData::new(LoadContext::Browsing, url, None, None, None);
load_data.data = Some(<[_]>::to_vec("Yay!".as_bytes()));
let mut headers = Headers::new();
@ -821,7 +824,7 @@ fn test_load_sends_cookie_if_nonhttp() {
cookie_jar.push(cookie, CookieSource::HTTP);
}
let mut load_data = LoadData::new(LoadContext::Browsing, url, None);
let mut load_data = LoadData::new(LoadContext::Browsing, url, None, None, None);
load_data.data = Some(<[_]>::to_vec("Yay!".as_bytes()));
let mut headers = Headers::new();
@ -855,7 +858,7 @@ fn test_cookie_set_with_httponly_should_not_be_available_using_getcookiesforurl(
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let _ = load(&load_data,
&ui_provider, &http_state,
None,
@ -885,7 +888,7 @@ fn test_when_cookie_received_marked_secure_is_ignored_for_http() {
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
let load_data = LoadData::new(LoadContext::Browsing, Url::parse("http://mozilla.com").unwrap(), None);
let load_data = LoadData::new(LoadContext::Browsing, Url::parse("http://mozilla.com").unwrap(), None, None, None);
let _ = load(&load_data,
&ui_provider, &http_state,
None,
@ -916,7 +919,7 @@ fn test_when_cookie_set_marked_httpsonly_secure_isnt_sent_on_http_request() {
cookie_jar.push(cookie, CookieSource::HTTP);
}
let mut load_data = LoadData::new(LoadContext::Browsing, url, None);
let mut load_data = LoadData::new(LoadContext::Browsing, url, None, None, None);
load_data.data = Some(<[_]>::to_vec("Yay!".as_bytes()));
assert_cookie_for_domain(http_state.cookie_jar.clone(), "https://mozilla.com", "mozillaIs=theBest");
@ -934,7 +937,8 @@ fn test_load_sets_content_length_to_length_of_request_body() {
let content = "This is a request body";
let url = Url::parse("http://mozilla.com").unwrap();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = Some(<[_]>::to_vec(content.as_bytes()));
let mut content_len_headers = Headers::new();
@ -959,7 +963,8 @@ fn test_load_uses_explicit_accept_from_headers_in_load_data() {
accept_headers.set(Accept(vec![text_html.clone()]));
let url = Url::parse("http://mozilla.com").unwrap();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = Some(<[_]>::to_vec("Yay!".as_bytes()));
load_data.headers.set(Accept(vec![text_html.clone()]));
@ -987,7 +992,8 @@ fn test_load_sets_default_accept_to_html_xhtml_xml_and_then_anything_else() {
]));
let url = Url::parse("http://mozilla.com").unwrap();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = Some(<[_]>::to_vec("Yay!".as_bytes()));
let http_state = HttpState::new();
@ -1009,7 +1015,7 @@ fn test_load_uses_explicit_accept_encoding_from_load_data_headers() {
accept_encoding_headers.set(AcceptEncoding(vec![qitem(Encoding::Chunked)]));
let url = Url::parse("http://mozilla.com").unwrap();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = Some(<[_]>::to_vec("Yay!".as_bytes()));
load_data.headers.set(AcceptEncoding(vec![qitem(Encoding::Chunked)]));
@ -1034,7 +1040,7 @@ fn test_load_sets_default_accept_encoding_to_gzip_and_deflate() {
qitem(Encoding::EncodingExt("br".to_owned()))]));
let url = Url::parse("http://mozilla.com").unwrap();
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let mut load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
load_data.data = Some(<[_]>::to_vec("Yay!".as_bytes()));
let http_state = HttpState::new();
@ -1069,7 +1075,7 @@ fn test_load_errors_when_there_a_redirect_loop() {
}
let url = Url::parse("http://mozilla.com").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -1099,7 +1105,7 @@ fn test_load_errors_when_there_is_too_many_redirects() {
}
let url = Url::parse("http://mozilla.com").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -1146,8 +1152,7 @@ fn test_load_follows_a_redirect() {
}
let url = Url::parse("http://mozilla.com").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -1174,7 +1179,7 @@ impl HttpRequestFactory for DontConnectFactory {
#[test]
fn test_load_errors_when_scheme_is_not_http_or_https() {
let url = Url::parse("ftp://not-supported").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -1193,7 +1198,7 @@ fn test_load_errors_when_scheme_is_not_http_or_https() {
#[test]
fn test_load_errors_when_viewing_source_and_inner_url_scheme_is_not_http_or_https() {
let url = Url::parse("view-source:ftp://not-supported").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -1236,7 +1241,7 @@ fn test_load_errors_when_cancelled() {
cancel_sender.send(()).unwrap();
let url = Url::parse("https://mozilla.com").unwrap();
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -1285,7 +1290,7 @@ fn test_redirect_from_x_to_y_provides_y_cookies_from_y() {
}
}
let load_data = LoadData::new(LoadContext::Browsing, url_x.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url_x.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -1351,7 +1356,7 @@ fn test_redirect_from_x_to_x_provides_x_with_cookie_from_first_response() {
}
}
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None);
let load_data = LoadData::new(LoadContext::Browsing, url.clone(), None, None, None);
let http_state = HttpState::new();
let ui_provider = TestProvider::new();
@ -1384,7 +1389,7 @@ fn test_if_auth_creds_not_in_url_but_in_cache_it_sets_it() {
http_state.auth_cache.write().unwrap().entries.insert(url.clone(), auth_entry);
let mut load_data = LoadData::new(LoadContext::Browsing, url, None);
let mut load_data = LoadData::new(LoadContext::Browsing, url, None, None, None);
load_data.credentials_flag = true;
let mut auth_header = Headers::new();
@ -1423,7 +1428,7 @@ fn test_auth_ui_sets_header_on_401() {
)
);
let load_data = LoadData::new(LoadContext::Browsing, url, None);
let load_data = LoadData::new(LoadContext::Browsing, url, None, None, None);
match load(
&load_data, &ui_provider, &http_state,
@ -1437,3 +1442,188 @@ fn test_auth_ui_sets_header_on_401() {
}
}
}
fn assert_referer_header_matches(request_url: &str,
referrer_url: &str,
referrer_policy: Option<ReferrerPolicy>,
expected_referrer: &str) {
let ref_url = Url::parse(referrer_url).unwrap();
let url = Url::parse(request_url).unwrap();
let ui_provider = TestProvider::new();
let load_data = LoadData::new(LoadContext::Browsing,
url.clone(),
None,
referrer_policy,
Some(ref_url));
let mut referer_headers = Headers::new();
referer_headers.set(Referer(expected_referrer.to_owned()));
let http_state = HttpState::new();
let _ = load(&load_data.clone(), &ui_provider, &http_state, None,
&AssertMustIncludeHeadersRequestFactory {
expected_headers: referer_headers,
body: <[_]>::to_vec(&[])
}, DEFAULT_USER_AGENT.to_owned(),
&CancellationListener::new(None));
}
fn assert_referer_header_not_included(request_url: &str, referrer_url: &str, referrer_policy: Option<ReferrerPolicy>) {
let ref_url = Url::parse(referrer_url).unwrap();
let url = Url::parse(request_url).unwrap();
let ui_provider = TestProvider::new();
let load_data = LoadData::new(LoadContext::Browsing,
url.clone(),
None,
referrer_policy,
Some(ref_url));
let http_state = HttpState::new();
let _ = load(
&load_data.clone(), &ui_provider, &http_state, None,
&AssertMustNotIncludeHeadersRequestFactory {
headers_not_expected: vec!["Referer".to_owned()],
body: <[_]>::to_vec(&[])
}, DEFAULT_USER_AGENT.to_owned(), &CancellationListener::new(None));
}
#[test]
fn test_referer_set_to_origin_with_originonly_policy() {
let request_url = "http://mozilla.com";
let referrer_url = "http://username:password@someurl.com/some/path#fragment";
let referrer_policy = Some(ReferrerPolicy::OriginOnly);
let expected_referrer = "http://someurl.com/";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_referer_set_to_stripped_url_with_unsafeurl_policy() {
let request_url = "http://mozilla.com";
let referrer_url = "http://username:password@someurl.com/some/path#fragment";
let referrer_policy = Some(ReferrerPolicy::UnsafeUrl);
let expected_referrer = "http://someurl.com/some/path";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_referer_with_originwhencrossorigin_policy_cross_orig() {
let request_url = "http://mozilla.com";
let referrer_url = "http://username:password@someurl.com/some/path#fragment";
let referrer_policy = Some(ReferrerPolicy::OriginWhenCrossOrigin);
let expected_referrer = "http://someurl.com/";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_referer_with_originwhencrossorigin_policy_same_orig() {
let request_url = "http://mozilla.com";
let referrer_url = "http://username:password@mozilla.com/some/path#fragment";
let referrer_policy = Some(ReferrerPolicy::OriginWhenCrossOrigin);
let expected_referrer = "http://mozilla.com/some/path";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_http_to_https_considered_cross_origin_for_referer_header_logic() {
let request_url = "https://mozilla.com";
let referrer_url = "http://mozilla.com/some/path";
let referrer_policy = Some(ReferrerPolicy::OriginWhenCrossOrigin);
let expected_referrer = "http://mozilla.com/";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_referer_set_to_ref_url_with_noreferrerwhendowngrade_policy_https_to_https() {
let request_url = "https://mozilla.com";
let referrer_url = "https://username:password@mozilla.com/some/path#fragment";
let referrer_policy = Some(ReferrerPolicy::NoRefWhenDowngrade);
let expected_referrer = "https://mozilla.com/some/path";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_no_referer_set_with_noreferrerwhendowngrade_policy_https_to_http() {
let request_url = "http://mozilla.com";
let referrer_url = "https://username:password@mozilla.com/some/path#fragment";
let referrer_policy = Some(ReferrerPolicy::NoRefWhenDowngrade);
assert_referer_header_not_included(request_url, referrer_url, referrer_policy)
}
#[test]
fn test_referer_set_to_ref_url_with_noreferrerwhendowngrade_policy_http_to_https() {
let request_url = "https://mozilla.com";
let referrer_url = "http://username:password@mozilla.com/some/path#fragment";
let referrer_policy = Some(ReferrerPolicy::NoRefWhenDowngrade);
let expected_referrer = "http://mozilla.com/some/path";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_referer_set_to_ref_url_with_noreferrerwhendowngrade_policy_http_to_http() {
let request_url = "http://mozilla.com";
let referrer_url = "http://username:password@mozilla.com/some/path#fragment";
let referrer_policy = Some(ReferrerPolicy::NoRefWhenDowngrade);
let expected_referrer = "http://mozilla.com/some/path";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_no_referrer_policy_follows_noreferrerwhendowngrade_https_to_https() {
let request_url = "https://mozilla.com";
let referrer_url = "https://username:password@mozilla.com/some/path#fragment";
let referrer_policy = None;
let expected_referrer = "https://mozilla.com/some/path";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_no_referrer_policy_follows_noreferrerwhendowngrade_https_to_http() {
let request_url = "http://mozilla.com";
let referrer_url = "https://username:password@mozilla.com/some/path#fragment";
let referrer_policy = None;
assert_referer_header_not_included(request_url, referrer_url, referrer_policy);
}
#[test]
fn test_no_referrer_policy_follows_noreferrerwhendowngrade_http_to_https() {
let request_url = "https://mozilla.com";
let referrer_url = "http://username:password@mozilla.com/some/path#fragment";
let referrer_policy = None;
let expected_referrer = "http://mozilla.com/some/path";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_no_referrer_policy_follows_noreferrerwhendowngrade_http_to_http() {
let request_url = "http://mozilla.com";
let referrer_url = "http://username:password@mozilla.com/some/path#fragment";
let referrer_policy = None;
let expected_referrer = "http://mozilla.com/some/path";
assert_referer_header_matches(request_url, referrer_url, referrer_policy, expected_referrer);
}
#[test]
fn test_no_referer_set_with_noreferrer_policy() {
let request_url = "http://mozilla.com";
let referrer_url = "http://someurl.com";
let referrer_policy = Some(ReferrerPolicy::NoReferrer);
assert_referer_header_not_included(request_url, referrer_url, referrer_policy)
}

View file

@ -27,8 +27,9 @@ fn test_bad_scheme() {
let resource_thread = new_resource_thread("".to_owned(), None);
let (start_chan, start) = ipc::channel().unwrap();
let url = Url::parse("bogus://whatever").unwrap();
resource_thread.send(ControlMsg::Load(LoadData::new(LoadContext::Browsing, url, None),
LoadConsumer::Channel(start_chan), None)).unwrap();
resource_thread.send(ControlMsg::Load(LoadData::new(LoadContext::Browsing, url, None, None, None),
LoadConsumer::Channel(start_chan), None)).unwrap();
let response = start.recv().unwrap();
match response.progress_port.recv().unwrap() {
ProgressMsg::Done(result) => { assert!(result.is_err()) }
@ -205,7 +206,7 @@ fn test_cancelled_listener() {
let (sync_sender, sync_receiver) = ipc::channel().unwrap();
let url = Url::parse(&format!("http://127.0.0.1:{}", port)).unwrap();
resource_thread.send(ControlMsg::Load(LoadData::new(LoadContext::Browsing, url, None),
resource_thread.send(ControlMsg::Load(LoadData::new(LoadContext::Browsing, url, None, None, None),
LoadConsumer::Channel(sender),
Some(id_sender))).unwrap();
// get the `ResourceId` and send a cancel message, which should stop the loading loop