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// Copyright (c) 2006-2008 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 "chrome/browser/sync/glue/http_bridge.h"
#include "base/message_loop.h"
#include "base/string_util.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/chrome_thread.h"
#include "net/base/cookie_monster.h"
#include "net/base/load_flags.h"
#include "net/http/http_cache.h"
#include "net/http/http_network_layer.h"
#include "net/http/http_response_headers.h"
#include "net/proxy/proxy_service.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_status.h"
#include "webkit/glue/webkit_glue.h"
namespace browser_sync {
HttpBridge::RequestContextGetter::RequestContextGetter(
URLRequestContextGetter* baseline_context_getter)
: baseline_context_getter_(baseline_context_getter) {
}
URLRequestContext* HttpBridge::RequestContextGetter::GetURLRequestContext() {
// Lazily create the context.
if (!context_) {
URLRequestContext* baseline_context =
baseline_context_getter_->GetURLRequestContext();
context_ = new RequestContext(baseline_context);
baseline_context_getter_ = NULL;
}
// Apply the user agent which was set earlier.
if (is_user_agent_set())
context_->set_user_agent(user_agent_);
return context_;
}
HttpBridgeFactory::HttpBridgeFactory(
URLRequestContextGetter* baseline_context_getter) {
DCHECK(baseline_context_getter != NULL);
request_context_getter_ =
new HttpBridge::RequestContextGetter(baseline_context_getter);
}
HttpBridgeFactory::~HttpBridgeFactory() {
}
sync_api::HttpPostProviderInterface* HttpBridgeFactory::Create() {
HttpBridge* http = new HttpBridge(request_context_getter_);
http->AddRef();
return http;
}
void HttpBridgeFactory::Destroy(sync_api::HttpPostProviderInterface* http) {
static_cast<HttpBridge*>(http)->Release();
}
HttpBridge::RequestContext::RequestContext(URLRequestContext* baseline_context)
: baseline_context_(baseline_context) {
// Create empty, in-memory cookie store.
cookie_store_ = new net::CookieMonster(NULL);
// We don't use a cache for bridged loads, but we do want to share proxy info.
host_resolver_ = baseline_context->host_resolver();
proxy_service_ = baseline_context->proxy_service();
ssl_config_service_ = baseline_context->ssl_config_service();
// We want to share the HTTP session data with the network layer factory,
// which includes auth_cache for proxies.
// Session is not refcounted so we need to be careful to not lose the parent
// context.
net::HttpNetworkSession* session =
baseline_context->http_transaction_factory()->GetSession();
DCHECK(session);
http_transaction_factory_ = net::HttpNetworkLayer::CreateFactory(session);
// TODO(timsteele): We don't currently listen for pref changes of these
// fields or CookiePolicy; I'm not sure we want to strictly follow the
// default settings, since for example if the user chooses to block all
// cookies, sync will start failing. Also it seems like accept_lang/charset
// should be tied to whatever the sync servers expect (if anything). These
// fields should probably just be settable by sync backend; though we should
// figure out if we need to give the user explicit control over policies etc.
accept_language_ = baseline_context->accept_language();
accept_charset_ = baseline_context->accept_charset();
// We default to the browser's user agent. This can (and should) be overridden
// with set_user_agent.
user_agent_ = webkit_glue::GetUserAgent(GURL());
}
HttpBridge::RequestContext::~RequestContext() {
delete http_transaction_factory_;
}
HttpBridge::HttpBridge(HttpBridge::RequestContextGetter* context_getter)
: context_getter_for_request_(context_getter),
url_poster_(NULL),
created_on_loop_(MessageLoop::current()),
request_completed_(false),
request_succeeded_(false),
http_response_code_(-1),
http_post_completed_(false, false) {
}
HttpBridge::~HttpBridge() {
}
void HttpBridge::SetUserAgent(const char* user_agent) {
DCHECK_EQ(MessageLoop::current(), created_on_loop_);
DCHECK(!request_completed_);
context_getter_for_request_->set_user_agent(user_agent);
}
void HttpBridge::SetExtraRequestHeaders(const char * headers) {
DCHECK(extra_headers_.empty())
<< "HttpBridge::SetExtraRequestHeaders called twice.";
extra_headers_.assign(headers);
}
void HttpBridge::SetURL(const char* url, int port) {
DCHECK_EQ(MessageLoop::current(), created_on_loop_);
DCHECK(!request_completed_);
DCHECK(url_for_request_.is_empty())
<< "HttpBridge::SetURL called more than once?!";
GURL temp(url);
GURL::Replacements replacements;
std::string port_str = IntToString(port);
replacements.SetPort(port_str.c_str(),
url_parse::Component(0, port_str.length()));
url_for_request_ = temp.ReplaceComponents(replacements);
}
void HttpBridge::SetPostPayload(const char* content_type,
int content_length,
const char* content) {
DCHECK_EQ(MessageLoop::current(), created_on_loop_);
DCHECK(!request_completed_);
DCHECK(content_type_.empty()) << "Bridge payload already set.";
DCHECK_GE(content_length, 0) << "Content length < 0";
content_type_ = content_type;
if (!content || (content_length == 0)) {
DCHECK_EQ(content_length, 0);
request_content_ = " "; // TODO(timsteele): URLFetcher requires non-empty
// content for POSTs whereas CURL does not, for now
// we hack this to support the sync backend.
} else {
request_content_.assign(content, content_length);
}
}
bool HttpBridge::MakeSynchronousPost(int* os_error_code, int* response_code) {
DCHECK_EQ(MessageLoop::current(), created_on_loop_);
DCHECK(!request_completed_);
DCHECK(url_for_request_.is_valid()) << "Invalid URL for request";
DCHECK(!content_type_.empty()) << "Payload not set";
ChromeThread::PostTask(
ChromeThread::IO, FROM_HERE,
NewRunnableMethod(this, &HttpBridge::CallMakeAsynchronousPost));
if (!http_post_completed_.Wait()) // Block until network request completes.
NOTREACHED(); // See OnURLFetchComplete.
DCHECK(request_completed_);
*os_error_code = os_error_code_;
*response_code = http_response_code_;
return request_succeeded_;
}
void HttpBridge::MakeAsynchronousPost() {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
DCHECK(!request_completed_);
url_poster_ = new URLFetcher(url_for_request_, URLFetcher::POST, this);
url_poster_->set_request_context(context_getter_for_request_);
url_poster_->set_upload_data(content_type_, request_content_);
url_poster_->set_extra_request_headers(extra_headers_);
url_poster_->Start();
}
int HttpBridge::GetResponseContentLength() const {
DCHECK_EQ(MessageLoop::current(), created_on_loop_);
DCHECK(request_completed_);
return response_content_.size();
}
const char* HttpBridge::GetResponseContent() const {
DCHECK_EQ(MessageLoop::current(), created_on_loop_);
DCHECK(request_completed_);
return response_content_.data();
}
const std::string HttpBridge::GetResponseHeaderValue(
const std::string& name) const {
DCHECK_EQ(MessageLoop::current(), created_on_loop_);
DCHECK(request_completed_);
std::string value;
response_headers_->EnumerateHeader(NULL, name, &value);
return value;
}
void HttpBridge::OnURLFetchComplete(const URLFetcher *source, const GURL &url,
const URLRequestStatus &status,
int response_code,
const ResponseCookies &cookies,
const std::string &data) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
request_completed_ = true;
request_succeeded_ = (URLRequestStatus::SUCCESS == status.status());
http_response_code_ = response_code;
os_error_code_ = status.os_error();
response_content_ = data;
response_headers_ = source->response_headers();
// End of the line for url_poster_. It lives only on the IO loop.
// We defer deletion because we're inside a callback from a component of the
// URLFetcher, so it seems most natural / "polite" to let the stack unwind.
MessageLoop::current()->DeleteSoon(FROM_HERE, url_poster_);
url_poster_ = NULL;
// Wake the blocked syncer thread in MakeSynchronousPost.
// WARNING: DONT DO ANYTHING AFTER THIS CALL! |this| may be deleted!
http_post_completed_.Signal();
}
} // namespace browser_sync
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