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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/url_fetcher.h"
#include "base/location.h"
#include "base/message_loop_proxy.h"
#include "googleurl/src/gurl.h"
#include "net/base/io_buffer.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_context_getter.h"
namespace remoting {
const int kBufferSize = 4096;
class UrlFetcher::Core : public base::RefCountedThreadSafe<Core>,
public net::URLRequest::Delegate {
public:
Core(const GURL& url, Method method);
void SetRequestContext(
net::URLRequestContextGetter* request_context_getter);
void SetUploadData(const std::string& upload_content_type,
const std::string& upload_content);
void SetHeader(const std::string& key, const std::string& value);
void Start(const UrlFetcher::DoneCallback& done_callback);
void Detach();
// net::UrlRequest::Delegate interface.
virtual void OnResponseStarted(net::URLRequest* request) OVERRIDE;
virtual void OnReadCompleted(net::URLRequest* request,
int bytes_read) OVERRIDE;
private:
friend class base::RefCountedThreadSafe<Core>;
virtual ~Core();
// Helper methods called on the IO thread.
void DoStart();
void ReadResponse();
void CancelRequest();
// Helper called on the delegate thread to invoke |done_callback_|.
void CallCallback(const net::URLRequestStatus& status,
int response_code);
GURL url_;
Method method_;
scoped_refptr<base::MessageLoopProxy> delegate_message_loop_;
scoped_refptr<base::MessageLoopProxy> io_message_loop_;
scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
std::string upload_content_;
std::string upload_content_type_;
net::HttpRequestHeaders request_headers_;
scoped_ptr<net::URLRequest> request_;
scoped_refptr<net::IOBuffer> buffer_;
std::string data_;
UrlFetcher::DoneCallback done_callback_;
DISALLOW_COPY_AND_ASSIGN(Core);
};
UrlFetcher::Core::Core(const GURL& url, Method method)
: url_(url),
method_(method),
delegate_message_loop_(base::MessageLoopProxy::current()),
buffer_(new net::IOBuffer(kBufferSize)) {
}
UrlFetcher::Core::~Core() {
}
void UrlFetcher::Core::SetRequestContext(
net::URLRequestContextGetter* request_context_getter) {
DCHECK(!request_context_getter_);
request_context_getter_ = request_context_getter;
}
void UrlFetcher::Core::SetUploadData(const std::string& upload_content_type,
const std::string& upload_content) {
upload_content_type_ = upload_content_type;
upload_content_ = upload_content;
}
void UrlFetcher::Core::SetHeader(const std::string& key,
const std::string& value) {
request_headers_.SetHeader(key, value);
}
void UrlFetcher::Core::Start(const UrlFetcher::DoneCallback& done_callback) {
done_callback_ = done_callback;
io_message_loop_ = request_context_getter_->GetIOMessageLoopProxy();
DCHECK(io_message_loop_);
io_message_loop_->PostTask(FROM_HERE, base::Bind(
&UrlFetcher::Core::DoStart, this));
}
void UrlFetcher::Core::Detach() {
DCHECK(delegate_message_loop_->BelongsToCurrentThread());
io_message_loop_->PostTask(
FROM_HERE, base::Bind(&UrlFetcher::Core::CancelRequest, this));
done_callback_.Reset();
}
void UrlFetcher::Core::OnResponseStarted(net::URLRequest* request) {
DCHECK_EQ(request, request_.get());
DCHECK(io_message_loop_->BelongsToCurrentThread());
ReadResponse();
}
void UrlFetcher::Core::OnReadCompleted(net::URLRequest* request,
int bytes_read) {
DCHECK_EQ(request, request_.get());
DCHECK(io_message_loop_->BelongsToCurrentThread());
do {
if (!request_->status().is_success() || bytes_read <= 0)
break;
data_.append(buffer_->data(), bytes_read);
} while (request_->Read(buffer_, kBufferSize, &bytes_read));
const net::URLRequestStatus status = request_->status();
if (!status.is_io_pending()) {
// We are done. Post a task to call |done_callback_|.
delegate_message_loop_->PostTask(
FROM_HERE, base::Bind(&UrlFetcher::Core::CallCallback, this, status,
request_->GetResponseCode()));
}
}
void UrlFetcher::Core::DoStart() {
DCHECK(io_message_loop_->BelongsToCurrentThread());
request_.reset(new net::URLRequest(url_, this));
request_->set_context(request_context_getter_->GetURLRequestContext());
switch (method_) {
case GET:
break;
case POST:
DCHECK(!upload_content_.empty());
DCHECK(!upload_content_type_.empty());
request_->set_method("POST");
request_headers_.SetHeader(net::HttpRequestHeaders::kContentType,
upload_content_type_);
request_->AppendBytesToUpload(
upload_content_.data(), static_cast<int>(upload_content_.length()));
break;
}
request_->SetExtraRequestHeaders(request_headers_);
request_->Start();
}
void UrlFetcher::Core::ReadResponse() {
int bytes_read = 0;
if (request_->status().is_success()) {
request_->Read(buffer_, kBufferSize, &bytes_read);
}
OnReadCompleted(request_.get(), bytes_read);
}
void UrlFetcher::Core::CallCallback(const net::URLRequestStatus& status,
int response_code) {
DCHECK(delegate_message_loop_->BelongsToCurrentThread());
if (!done_callback_.is_null()) {
done_callback_.Run(status, response_code, data_);
}
}
void UrlFetcher::Core::CancelRequest() {
if (request_.get()) {
request_->Cancel();
request_.reset();
}
}
UrlFetcher::UrlFetcher(const GURL& url, Method method)
: core_ (new Core(url, method)) {
}
UrlFetcher::~UrlFetcher() {
core_->Detach();
}
void UrlFetcher::SetRequestContext(
net::URLRequestContextGetter* request_context_getter) {
core_->SetRequestContext(request_context_getter);
}
void UrlFetcher::SetUploadData(const std::string& upload_content_type,
const std::string& upload_content) {
core_->SetUploadData(upload_content_type, upload_content);
}
void UrlFetcher::SetHeader(const std::string& key, const std::string& value) {
core_->SetHeader(key, value);
}
void UrlFetcher::Start(const DoneCallback& done_callback) {
core_->Start(done_callback);
}
} // namespace remoting
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