chromeos/network/dhcp_proxy_script_fetcher_chromeos.cc

   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 #include "chromeos/network/dhcp_proxy_script_fetcher_chromeos.h"
   6
   7 #include "base/location.h"
   8 #include "base/task_runner_util.h"
   9 #include "chromeos/network/network_event_log.h"
  10 #include "chromeos/network/network_handler.h"
  11 #include "chromeos/network/network_state.h"
  12 #include "chromeos/network/network_state_handler.h"
  13 #include "net/proxy/proxy_script_fetcher.h"
  14 #include "net/proxy/proxy_script_fetcher_impl.h"
  15 #include "net/url_request/url_request_context.h"
  16
  17 namespace chromeos {
  18
  19 namespace {
  20
  21 // Runs on NetworkHandler::Get()->message_loop().
  22 std::string GetPacUrlFromDefaultNetwork() {
  23   if (!NetworkHandler::IsInitialized())
  24     return std::string();
  25   const NetworkState* default_network =
  26       NetworkHandler::Get()->network_state_handler()->DefaultNetwork();
  27   if (default_network)
  28     return default_network->web_proxy_auto_discovery_url().spec();
  29   return std::string();
  30 }
  31
  32 }  // namespace
  33
  34 DhcpProxyScriptFetcherChromeos::DhcpProxyScriptFetcherChromeos(
  35     net::URLRequestContext* url_request_context)
  36     : url_request_context_(url_request_context),
  37       weak_ptr_factory_(this) {
  38   DCHECK(url_request_context_);
  39   proxy_script_fetcher_.reset(
  40       new net::ProxyScriptFetcherImpl(url_request_context_));
  41   if (NetworkHandler::IsInitialized())
  42     network_handler_task_runner_ = NetworkHandler::Get()->task_runner();
  43 }
  44
  45 DhcpProxyScriptFetcherChromeos::~DhcpProxyScriptFetcherChromeos() {
  46 }
  47
  48 int DhcpProxyScriptFetcherChromeos::Fetch(
  49     base::string16* utf16_text,
  50     const net::CompletionCallback& callback) {
  51   if (!network_handler_task_runner_.get())
  52     return net::ERR_PAC_NOT_IN_DHCP;
  53   CHECK(!callback.is_null());
  54   base::PostTaskAndReplyWithResult(
  55       network_handler_task_runner_.get(), FROM_HERE,
  56       base::Bind(&GetPacUrlFromDefaultNetwork),
  57       base::Bind(&DhcpProxyScriptFetcherChromeos::ContinueFetch,
  58                  weak_ptr_factory_.GetWeakPtr(), utf16_text, callback));
  59   return net::ERR_IO_PENDING;
  60 }
  61
  62 void DhcpProxyScriptFetcherChromeos::Cancel() {
  63   proxy_script_fetcher_->Cancel();
  64   // Invalidate any pending callbacks (i.e. calls to ContinueFetch).
  65   weak_ptr_factory_.InvalidateWeakPtrs();
  66 }
  67
  68 const GURL& DhcpProxyScriptFetcherChromeos::GetPacURL() const {
  69   return pac_url_;
  70 }
  71
  72 std::string DhcpProxyScriptFetcherChromeos::GetFetcherName() const {
  73   return "chromeos";
  74 }
  75
  76 void DhcpProxyScriptFetcherChromeos::ContinueFetch(
  77     base::string16* utf16_text,
  78     net::CompletionCallback callback,
  79     std::string pac_url) {
  80   NET_LOG_EVENT("DhcpProxyScriptFetcher", pac_url);
  81   pac_url_ = GURL(pac_url);
  82   if (pac_url_.is_empty()) {
  83     callback.Run(net::ERR_PAC_NOT_IN_DHCP);
  84     return;
  85   }
  86   int res = proxy_script_fetcher_->Fetch(pac_url_, utf16_text, callback);
  87   if (res != net::ERR_IO_PENDING)
  88     callback.Run(res);
  89 }
  90
  91 }  // namespace chromeos