content/browser/resolve_proxy_msg_helper.cc

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