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// Copyright (c) 2011 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 "content/browser/resolve_proxy_msg_helper.h"
#include "base/compiler_specific.h"
#include "chrome/browser/profiles/profile.h"
#include "content/common/child_process_messages.h"
#include "net/base/net_errors.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
ResolveProxyMsgHelper::ResolveProxyMsgHelper(net::ProxyService* proxy_service)
: proxy_service_(NULL),
ALLOW_THIS_IN_INITIALIZER_LIST(callback_(
this, &ResolveProxyMsgHelper::OnResolveProxyCompleted)),
proxy_service_override_(proxy_service) {
}
bool ResolveProxyMsgHelper::OnMessageReceived(const IPC::Message& message,
bool* message_was_ok) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_EX(ResolveProxyMsgHelper, message, *message_was_ok)
IPC_MESSAGE_HANDLER_DELAY_REPLY(ChildProcessHostMsg_ResolveProxy,
OnResolveProxy)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void ResolveProxyMsgHelper::OnResolveProxy(const GURL& url,
IPC::Message* reply_msg) {
// Enqueue the pending request.
pending_requests_.push_back(PendingRequest(url, reply_msg));
// If nothing is in progress, start.
if (pending_requests_.size() == 1)
StartPendingRequest();
}
void ResolveProxyMsgHelper::OnResolveProxyCompleted(int result) {
CHECK(!pending_requests_.empty());
const PendingRequest& completed_req = pending_requests_.front();
ChildProcessHostMsg_ResolveProxy::WriteReplyParams(
completed_req.reply_msg, result, proxy_info_.ToPacString());
Send(completed_req.reply_msg);
// Clear the current (completed) request.
pending_requests_.pop_front();
proxy_service_ = NULL;
// Start the next request.
if (!pending_requests_.empty())
StartPendingRequest();
}
void ResolveProxyMsgHelper::StartPendingRequest() {
PendingRequest& req = pending_requests_.front();
// Verify the request wasn't started yet.
DCHECK(NULL == req.pac_req);
DCHECK(NULL == proxy_service_);
// Start the request.
bool ok = GetProxyService(&proxy_service_);
if (!ok) {
// During shutdown, there may be no ProxyService to use, because the
// default ChromeURLRequestContext has already been NULL-ed out.
LOG(WARNING) << "Failed getting default URLRequestContext";
OnResolveProxyCompleted(net::ERR_FAILED);
return;
}
int result = proxy_service_->ResolveProxy(
req.url, &proxy_info_, &callback_, &req.pac_req, net::BoundNetLog());
// Completed synchronously.
if (result != net::ERR_IO_PENDING)
OnResolveProxyCompleted(result);
}
bool ResolveProxyMsgHelper::GetProxyService(net::ProxyService** out) const {
// Unit-tests specify their own proxy service to use.
if (proxy_service_override_) {
*out = proxy_service_override_;
return true;
}
// If there is no default request context (say during shut down).
net::URLRequestContextGetter* context_getter =
Profile::Deprecated::GetDefaultRequestContext();
if (!context_getter)
return false;
// Otherwise use the browser's global proxy service.
*out = context_getter->GetURLRequestContext()->proxy_service();
return true;
}
ResolveProxyMsgHelper::~ResolveProxyMsgHelper() {
// Clear all pending requests if the ProxyService is still alive (if we have a
// default request context or override).
if (!pending_requests_.empty() &&
(Profile::Deprecated::GetDefaultRequestContext() ||
proxy_service_override_)) {
PendingRequest req = pending_requests_.front();
proxy_service_->CancelPacRequest(req.pac_req);
}
for (PendingRequestList::iterator it = pending_requests_.begin();
it != pending_requests_.end();
++it) {
delete it->reply_msg;
}
proxy_service_ = NULL;
pending_requests_.clear();
}
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