1// Copyright (c) 2013 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#ifndef CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_
6#define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_
7
8#include <queue>
9#include <string>
10
11#include "base/compiler_specific.h"
12#include "base/memory/weak_ptr.h"
13#include "content/common/content_export.h"
14#include "net/proxy/proxy_service.h"
15#include "ppapi/host/host_message_context.h"
16#include "ppapi/host/resource_host.h"
17
18namespace net {
19class ProxyInfo;
20class URLRequestContextGetter;
21}
22
23namespace ppapi {
24namespace host {
25struct ReplyMessageContext;
26}
27}
28
29namespace content {
30
31class BrowserPpapiHostImpl;
32
33// The host for PPB_NetworkProxy. This class lives on the IO thread.
34class CONTENT_EXPORT PepperNetworkProxyHost : public ppapi::host::ResourceHost {
35 public:
36  PepperNetworkProxyHost(BrowserPpapiHostImpl* host,
37                         PP_Instance instance,
38                         PP_Resource resource);
39
40  virtual ~PepperNetworkProxyHost();
41
42 private:
43  // We retrieve the appropriate URLRequestContextGetter and whether this API
44  // is allowed for the instance on the UI thread and pass those to
45  // DidGetUIThreadData, which sets allowed_ and proxy_service_.
46  struct UIThreadData {
47    UIThreadData();
48    ~UIThreadData();
49    bool is_allowed;
50    scoped_refptr<net::URLRequestContextGetter> context_getter;
51  };
52  static UIThreadData GetUIThreadDataOnUIThread(int render_process_id,
53                                                int render_frame_id,
54                                                bool is_external_plugin);
55  void DidGetUIThreadData(const UIThreadData&);
56
57  // ResourceHost implementation.
58  virtual int32_t OnResourceMessageReceived(
59      const IPC::Message& msg,
60      ppapi::host::HostMessageContext* context) OVERRIDE;
61
62  int32_t OnMsgGetProxyForURL(ppapi::host::HostMessageContext* context,
63                              const std::string& url);
64
65  // If we have a valid proxy_service_, send all messages in unsent_requests_.
66  void TryToSendUnsentRequests();
67
68  void OnResolveProxyCompleted(ppapi::host::ReplyMessageContext context,
69                               net::ProxyInfo* proxy_info,
70                               int result);
71  void SendFailureReply(int32_t error,
72                        ppapi::host::ReplyMessageContext context);
73
74  // The following two members are invalid until we get some information from
75  // the UI thread. However, these are only ever set or accessed on the IO
76  // thread.
77  net::ProxyService* proxy_service_;
78  bool is_allowed_;
79
80  // True initially, but set to false once the values for proxy_service_ and
81  // is_allowed_ have been set.
82  bool waiting_for_ui_thread_data_;
83
84  // We have to get the URLRequestContextGetter from the UI thread before we
85  // can retrieve proxy_service_. If we receive any calls for GetProxyForURL
86  // before proxy_service_ is available, we save them in unsent_requests_.
87  struct UnsentRequest {
88    GURL url;
89    ppapi::host::ReplyMessageContext reply_context;
90  };
91  std::queue<UnsentRequest> unsent_requests_;
92
93  // Requests awaiting a response from ProxyService. We need to store these so
94  // that we can cancel them if we get destroyed.
95  std::queue<net::ProxyService::PacRequest*> pending_requests_;
96
97  base::WeakPtrFactory<PepperNetworkProxyHost> weak_factory_;
98
99  DISALLOW_COPY_AND_ASSIGN(PepperNetworkProxyHost);
100};
101
102}  // namespace content
103
104#endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_
105