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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 "chrome/browser/net/proxy_service_factory.h"
6 
7 #include "base/command_line.h"
8 #include "base/strings/string_number_conversions.h"
9 #include "base/threading/thread.h"
10 #include "chrome/browser/browser_process.h"
11 #include "chrome/browser/io_thread.h"
12 #include "chrome/browser/net/pref_proxy_config_tracker_impl.h"
13 #include "chrome/common/chrome_switches.h"
14 #include "chrome/common/pref_names.h"
15 #include "content/public/browser/browser_thread.h"
16 #include "net/base/net_log.h"
17 #include "net/proxy/dhcp_proxy_script_fetcher_factory.h"
18 #include "net/proxy/proxy_config_service.h"
19 #include "net/proxy/proxy_script_fetcher_impl.h"
20 #include "net/proxy/proxy_service.h"
21 #include "net/proxy/proxy_service_v8.h"
22 #include "net/url_request/url_request_context.h"
23 
24 #if defined(OS_CHROMEOS)
25 #include "chrome/browser/chromeos/proxy_config_service_impl.h"
26 #include "chromeos/network/dhcp_proxy_script_fetcher_chromeos.h"
27 #endif  // defined(OS_CHROMEOS)
28 
29 #if !defined(OS_IOS)
30 #include "net/proxy/proxy_resolver_v8.h"
31 #endif
32 
33 using content::BrowserThread;
34 
35 // static
CreateProxyConfigService(PrefProxyConfigTracker * tracker)36 net::ProxyConfigService* ProxyServiceFactory::CreateProxyConfigService(
37     PrefProxyConfigTracker* tracker) {
38   // The linux gconf-based proxy settings getter relies on being initialized
39   // from the UI thread.
40   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
41 
42   scoped_ptr<net::ProxyConfigService> base_service;
43 
44 #if !defined(OS_CHROMEOS)
45   // On ChromeOS, base service is NULL; chromeos::ProxyConfigServiceImpl
46   // determines the effective proxy config to take effect in the network layer,
47   // be it from prefs or system (which is network shill on chromeos).
48 
49   // For other platforms, create a baseline service that provides proxy
50   // configuration in case nothing is configured through prefs (Note: prefs
51   // include command line and configuration policy).
52 
53   // TODO(port): the IO and FILE message loops are only used by Linux.  Can
54   // that code be moved to chrome/browser instead of being in net, so that it
55   // can use BrowserThread instead of raw MessageLoop pointers? See bug 25354.
56   base_service.reset(net::ProxyService::CreateSystemProxyConfigService(
57       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO),
58       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE)));
59 #endif  // !defined(OS_CHROMEOS)
60 
61   return tracker->CreateTrackingProxyConfigService(base_service.Pass())
62       .release();
63 }
64 
65 // static
66 PrefProxyConfigTracker*
CreatePrefProxyConfigTrackerOfProfile(PrefService * profile_prefs,PrefService * local_state_prefs)67 ProxyServiceFactory::CreatePrefProxyConfigTrackerOfProfile(
68     PrefService* profile_prefs,
69     PrefService* local_state_prefs) {
70 #if defined(OS_CHROMEOS)
71   return new chromeos::ProxyConfigServiceImpl(profile_prefs, local_state_prefs);
72 #else
73   return new PrefProxyConfigTrackerImpl(profile_prefs);
74 #endif  // defined(OS_CHROMEOS)
75 }
76 
77 // static
78 PrefProxyConfigTracker*
CreatePrefProxyConfigTrackerOfLocalState(PrefService * local_state_prefs)79 ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
80     PrefService* local_state_prefs) {
81 #if defined(OS_CHROMEOS)
82   return new chromeos::ProxyConfigServiceImpl(NULL, local_state_prefs);
83 #else
84   return new PrefProxyConfigTrackerImpl(local_state_prefs);
85 #endif  // defined(OS_CHROMEOS)
86 }
87 
88 // static
CreateProxyService(net::NetLog * net_log,net::URLRequestContext * context,net::NetworkDelegate * network_delegate,net::ProxyConfigService * proxy_config_service,const CommandLine & command_line,bool quick_check_enabled)89 net::ProxyService* ProxyServiceFactory::CreateProxyService(
90     net::NetLog* net_log,
91     net::URLRequestContext* context,
92     net::NetworkDelegate* network_delegate,
93     net::ProxyConfigService* proxy_config_service,
94     const CommandLine& command_line,
95     bool quick_check_enabled) {
96   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
97 
98 #if defined(OS_IOS)
99   bool use_v8 = false;
100 #else
101   bool use_v8 = !command_line.HasSwitch(switches::kWinHttpProxyResolver);
102   if (use_v8 && command_line.HasSwitch(switches::kSingleProcess)) {
103     // See the note about V8 multithreading in net/proxy/proxy_resolver_v8.h
104     // to understand why we have this limitation.
105     LOG(ERROR) << "Cannot use V8 Proxy resolver in single process mode.";
106     use_v8 = false;  // Fallback to non-v8 implementation.
107   }
108 #endif  // defined(OS_IOS)
109 
110   size_t num_pac_threads = 0u;  // Use default number of threads.
111 
112   // Check the command line for an override on the number of proxy resolver
113   // threads to use.
114   if (command_line.HasSwitch(switches::kNumPacThreads)) {
115     std::string s = command_line.GetSwitchValueASCII(switches::kNumPacThreads);
116 
117     // Parse the switch (it should be a positive integer formatted as decimal).
118     int n;
119     if (base::StringToInt(s, &n) && n > 0) {
120       num_pac_threads = static_cast<size_t>(n);
121     } else {
122       LOG(ERROR) << "Invalid switch for number of PAC threads: " << s;
123     }
124   }
125 
126   net::ProxyService* proxy_service = NULL;
127   if (use_v8) {
128 #if defined(OS_IOS)
129     NOTREACHED();
130 #else
131     net::ProxyResolverV8::EnsureIsolateCreated();
132 
133     net::DhcpProxyScriptFetcher* dhcp_proxy_script_fetcher;
134 #if defined(OS_CHROMEOS)
135     dhcp_proxy_script_fetcher =
136         new chromeos::DhcpProxyScriptFetcherChromeos(context);
137 #else
138     net::DhcpProxyScriptFetcherFactory dhcp_factory;
139     dhcp_proxy_script_fetcher = dhcp_factory.Create(context);
140 #endif
141 
142     proxy_service = net::CreateProxyServiceUsingV8ProxyResolver(
143         proxy_config_service,
144         new net::ProxyScriptFetcherImpl(context),
145         dhcp_proxy_script_fetcher,
146         context->host_resolver(),
147         net_log,
148         network_delegate);
149 #endif  // defined(OS_IOS)
150   } else {
151     proxy_service = net::ProxyService::CreateUsingSystemProxyResolver(
152         proxy_config_service,
153         num_pac_threads,
154         net_log);
155   }
156 
157   proxy_service->set_quick_check_enabled(quick_check_enabled);
158 
159   return proxy_service;
160 }
161