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Update main fetch

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This commit is contained in:
Keith Yeung 2017-06-24 03:33:51 -07:00
parent c9d9ed8e96
commit ed9c16575c
3 changed files with 63 additions and 24 deletions
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67
components/net/fetch/methods.rs
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@ -10,14 +10,14 @@ use filemanager_thread::FileManager;
use http_loader::{HttpState, determine_request_referrer, http_fetch};
use http_loader::{set_default_accept, set_default_accept_language};
use hyper::{Error, Result as HyperResult};
use hyper::header::{Accept, AcceptLanguage, ContentLanguage, ContentType};
use hyper::header::{Accept, AcceptLanguage, AccessControlExposeHeaders, ContentLanguage, ContentType};
use hyper::header::{Header, HeaderFormat, HeaderView, Headers, Referer as RefererHeader};
use hyper::method::Method;
use hyper::mime::{Mime, SubLevel, TopLevel};
use hyper::status::StatusCode;
use mime_guess::guess_mime_type;
use net_traits::{FetchTaskTarget, NetworkError, ReferrerPolicy};
use net_traits::request::{Referrer, Request, RequestMode, ResponseTainting};
use net_traits::request::{CredentialsMode, Referrer, Request, RequestMode, ResponseTainting};
use net_traits::request::{Type, Origin, Window};
use net_traits::response::{Response, ResponseBody, ResponseType};
use servo_url::ServoUrl;
@ -107,9 +107,8 @@ pub fn main_fetch(request: &mut Request,
// Step 2.
if request.local_urls_only {
match request.current_url().scheme() {
"about" | "blob" | "data" | "filesystem" => (), // Ok, the URL is local.
_ => response = Some(Response::network_error(NetworkError::Internal("Non-local scheme".into())))
if !matches!(request.current_url().scheme(), "about" | "blob" | "data" | "filesystem") {
response = Some(Response::network_error(NetworkError::Internal("Non-local scheme".into())));
}
}
@ -130,8 +129,7 @@ pub fn main_fetch(request: &mut Request,
// TODO: handle request's client's referrer policy.
// Step 7.
let referrer_policy = request.referrer_policy.unwrap_or(ReferrerPolicy::NoReferrerWhenDowngrade);
request.referrer_policy = Some(referrer_policy);
request.referrer_policy = request.referrer_policy.or(Some(ReferrerPolicy::NoReferrerWhenDowngrade));
// Step 8.
{
@ -147,7 +145,7 @@ pub fn main_fetch(request: &mut Request,
request.headers.remove::<RefererHeader>();
let current_url = request.current_url().clone();
determine_request_referrer(&mut request.headers,
referrer_policy,
request.referrer_policy.unwrap(),
url,
current_url)
}
@ -168,7 +166,7 @@ pub fn main_fetch(request: &mut Request,
// Not applicable: see fetch_async.
// Step 12.
let response = response.unwrap_or_else(|| {
let mut response = response.unwrap_or_else(|| {
let current_url = request.current_url();
let same_origin = if let Origin::Origin(ref origin) = request.origin {
*origin == current_url.origin()
@ -178,16 +176,25 @@ pub fn main_fetch(request: &mut Request,
if (same_origin && !cors_flag ) ||
current_url.scheme() == "data" ||
current_url.scheme() == "file" ||
current_url.scheme() == "file" || // FIXME: Fetch spec has already dropped filtering against file:
// and about: schemes, but CSS tests will break on loading Ahem
// since we load them through a file: URL.
current_url.scheme() == "about" ||
request.mode == RequestMode::Navigate {
// Substep 1.
request.response_tainting = ResponseTainting::Basic;
// Substep 2.
basic_fetch(request, cache, target, done_chan, context)
} else if request.mode == RequestMode::SameOrigin {
Response::network_error(NetworkError::Internal("Cross-origin response".into()))
} else if request.mode == RequestMode::NoCors {
// Substep 1.
request.response_tainting = ResponseTainting::Opaque;
// Substep 2.
basic_fetch(request, cache, target, done_chan, context)
} else if !matches!(current_url.scheme(), "http" | "https") {
@ -195,18 +202,24 @@ pub fn main_fetch(request: &mut Request,
} else if request.use_cors_preflight ||
(request.unsafe_request &&
(!is_simple_method(&request.method) ||
request.headers.iter().any(|h| !is_simple_header(&h)))) {
(!is_cors_safelisted_method(&request.method) ||
request.headers.iter().any(|h| !is_cors_safelisted_request_header(&h)))) {
// Substep 1.
request.response_tainting = ResponseTainting::CorsTainting;
// Substep 2.
let response = http_fetch(request, cache, true, true, false,
target, done_chan, context);
// Substep 3.
if response.is_network_error() {
// TODO clear cache entries using request
}
// Substep 4.
response
} else {
// Substep 1.
request.response_tainting = ResponseTainting::CorsTainting;
// Substep 2.
http_fetch(request, cache, true, false, false, target, done_chan, context)
}
});
@ -217,9 +230,28 @@ pub fn main_fetch(request: &mut Request,
}
// Step 14.
// We don't need to check whether response is a network error,
// given its type would not be `Default` in this case.
let mut response = if response.response_type == ResponseType::Default {
let mut response = if !response.is_network_error() && response.internal_response.is_none() {
// Substep 1.
if request.response_tainting == ResponseTainting::CorsTainting {
// Subsubstep 1.
let header_names = response.headers.get::<AccessControlExposeHeaders>();
match header_names {
// Subsubstep 2.
Some(list) if request.credentials_mode != CredentialsMode::Include => {
if list.len() == 1 && list[0] == "*" {
response.cors_exposed_header_name_list =
response.headers.iter().map(|h| h.name().to_owned()).collect();
}
},
// Subsubstep 3.
Some(list) => {
response.cors_exposed_header_name_list = list.iter().map(|h| (**h).clone()).collect();
},
_ => (),
}
}
// Substep 2.
let response_type = match request.response_tainting {
ResponseTainting::Basic => ResponseType::Basic,
ResponseTainting::CorsTainting => ResponseType::Cors,
@ -463,7 +495,7 @@ fn basic_fetch(request: &mut Request,
}
/// https://fetch.spec.whatwg.org/#cors-safelisted-request-header
pub fn is_simple_header(h: &HeaderView) -> bool {
pub fn is_cors_safelisted_request_header(h: &HeaderView) -> bool {
if h.is::<ContentType>() {
match h.value() {
Some(&ContentType(Mime(TopLevel::Text, SubLevel::Plain, _))) |
@ -477,7 +509,8 @@ pub fn is_simple_header(h: &HeaderView) -> bool {
}
}
pub fn is_simple_method(m: &Method) -> bool {
/// https://fetch.spec.whatwg.org/#cors-safelisted-method
pub fn is_cors_safelisted_method(m: &Method) -> bool {
match *m {
Method::Get | Method::Head | Method::Post => true,
_ => false