1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "content/browser/resolve_proxy_msg_helper.h"
6
7#include "base/bind.h"
8#include "base/bind_helpers.h"
9#include "base/compiler_specific.h"
10#include "content/common/view_messages.h"
11#include "net/base/load_flags.h"
12#include "net/base/net_errors.h"
13#include "net/url_request/url_request_context.h"
14#include "net/url_request/url_request_context_getter.h"
15
16namespace content {
17
18ResolveProxyMsgHelper::ResolveProxyMsgHelper(
19    net::URLRequestContextGetter* getter)
20    : BrowserMessageFilter(ViewMsgStart),
21      context_getter_(getter),
22      proxy_service_(NULL) {
23}
24
25ResolveProxyMsgHelper::ResolveProxyMsgHelper(net::ProxyService* proxy_service)
26    : BrowserMessageFilter(ViewMsgStart),
27      proxy_service_(proxy_service) {
28}
29
30bool ResolveProxyMsgHelper::OnMessageReceived(const IPC::Message& message) {
31  bool handled = true;
32  IPC_BEGIN_MESSAGE_MAP(ResolveProxyMsgHelper, message)
33    IPC_MESSAGE_HANDLER_DELAY_REPLY(ViewHostMsg_ResolveProxy, OnResolveProxy)
34    IPC_MESSAGE_UNHANDLED(handled = false)
35  IPC_END_MESSAGE_MAP()
36  return handled;
37}
38
39void ResolveProxyMsgHelper::OnResolveProxy(const GURL& url,
40                                           IPC::Message* reply_msg) {
41  // Enqueue the pending request.
42  pending_requests_.push_back(PendingRequest(url, reply_msg));
43
44  // If nothing is in progress, start.
45  if (pending_requests_.size() == 1)
46    StartPendingRequest();
47}
48
49ResolveProxyMsgHelper::~ResolveProxyMsgHelper() {
50  // Clear all pending requests if the ProxyService is still alive (if we have a
51  // default request context or override).
52  if (!pending_requests_.empty()) {
53    PendingRequest req = pending_requests_.front();
54    proxy_service_->CancelPacRequest(req.pac_req);
55  }
56
57  for (PendingRequestList::iterator it = pending_requests_.begin();
58       it != pending_requests_.end();
59       ++it) {
60    delete it->reply_msg;
61  }
62
63  pending_requests_.clear();
64}
65
66void ResolveProxyMsgHelper::OnResolveProxyCompleted(int result) {
67  CHECK(!pending_requests_.empty());
68
69  const PendingRequest& completed_req = pending_requests_.front();
70  ViewHostMsg_ResolveProxy::WriteReplyParams(
71      completed_req.reply_msg, result == net::OK, proxy_info_.ToPacString());
72  Send(completed_req.reply_msg);
73
74  // Clear the current (completed) request.
75  pending_requests_.pop_front();
76
77  // Start the next request.
78  if (!pending_requests_.empty())
79    StartPendingRequest();
80}
81
82void ResolveProxyMsgHelper::StartPendingRequest() {
83  PendingRequest& req = pending_requests_.front();
84
85  // Verify the request wasn't started yet.
86  DCHECK(NULL == req.pac_req);
87
88  if (context_getter_.get()) {
89    proxy_service_ = context_getter_->GetURLRequestContext()->proxy_service();
90    context_getter_ = NULL;
91  }
92
93  // Start the request.
94  int result = proxy_service_->ResolveProxy(
95      req.url, net::LOAD_NORMAL, &proxy_info_,
96      base::Bind(&ResolveProxyMsgHelper::OnResolveProxyCompleted,
97                 base::Unretained(this)),
98      &req.pac_req, NULL, net::BoundNetLog());
99
100  // Completed synchronously.
101  if (result != net::ERR_IO_PENDING)
102    OnResolveProxyCompleted(result);
103}
104
105}  // namespace content
106