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Auto merge of #11129 - KiChjang:fetch-read-block, r=jdm

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Use read_block in http_network_fetch

Previously the commented out code was not working because there was a deadlock situation where `res_body` is being locked and borrowed to read the inner `body` if it is a `ResponseBody::Receiving` variant, and then locked and borrowed mutably to change `res_body` to `ResponseBody::Done`.

r? @jdm

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This commit is contained in:
bors-servo 2016-05-11 23:44:15 -07:00
commit e2a5b1cb71
1 changed files with 18 additions and 27 deletions
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45
components/net/fetch/methods.rs
View file

@ -5,7 +5,7 @@
use connector::create_http_connector;
use data_loader::decode;
use fetch::cors_cache::CORSCache;
use http_loader::{NetworkHttpRequestFactory, obtain_response};
use http_loader::{NetworkHttpRequestFactory, ReadResult, obtain_response, read_block};
use hyper::header::{Accept, AcceptLanguage, Authorization, AccessControlAllowCredentials};
use hyper::header::{AccessControlAllowOrigin, AccessControlAllowHeaders, AccessControlAllowMethods};
use hyper::header::{AccessControlRequestHeaders, AccessControlMaxAge, AccessControlRequestMethod, Basic};
@ -850,34 +850,25 @@ fn http_network_fetch(request: Rc<Request>,
thread::spawn(move || {
*res_body.lock().unwrap() = ResponseBody::Receiving(vec![]);
let mut new_body = vec![];
res.response.read_to_end(&mut new_body).unwrap();
let mut body = res_body.lock().unwrap();
assert!(*body != ResponseBody::Empty);
*body = ResponseBody::Done(new_body);
loop {
match read_block(&mut res.response) {
Ok(ReadResult::Payload(ref mut chunk)) => {
if let ResponseBody::Receiving(ref mut body) = *res_body.lock().unwrap() {
body.append(chunk);
}
},
Ok(ReadResult::EOF) | Err(_) => {
let completed_body = match *res_body.lock().unwrap() {
ResponseBody::Receiving(ref body) => (*body).clone(),
_ => vec![]
};
*res_body.lock().unwrap() = ResponseBody::Done(completed_body);
break;
}
}
// TODO: the vec storage format is much too slow for these operations,
// response.body needs to use something else before this code can be used
// *res_body.lock().unwrap() = ResponseBody::Receiving(vec![]);
// loop {
// match read_block(&mut res.response) {
// Ok(ReadResult::Payload(ref mut new_body)) => {
// if let ResponseBody::Receiving(ref mut body) = *res_body.lock().unwrap() {
// (body).append(new_body);
// }
// },
// Ok(ReadResult::EOF) | Err(_) => break
// }
// }
// let mut completed_body = res_body.lock().unwrap();
// if let ResponseBody::Receiving(ref body) = *completed_body {
// // TODO cloning seems sub-optimal, but I couldn't figure anything else out
// *res_body.lock().unwrap() = ResponseBody::Done((*body).clone());
// }
}
});
},
Err(_) =>