Implement extension:// protocol.

chrome/browser/net/chrome_url_request_context.cc

+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/net/chrome_url_request_context.h"
+
+#include "base/command_line.h"
+#include "base/string_util.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/chrome_thread.h"
+#include "chrome/browser/extensions/extensions_service.h"
+#include "chrome/browser/profile.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/pref_names.h"
+#include "net/http/http_cache.h"
+#include "net/proxy/proxy_service.h"
+#include "webkit/glue/webkit_glue.h"
+
+// Sets up proxy info if it was specified, otherwise returns NULL. The
+// returned pointer MUST be deleted by the caller if non-NULL.
+static net::ProxyInfo* CreateProxyInfo() {
+  net::ProxyInfo* proxy_info = NULL;
+
+  CommandLine command_line;
+  if (command_line.HasSwitch(switches::kProxyServer)) {
+    proxy_info = new net::ProxyInfo();
+    const std::wstring& proxy_server =
+        command_line.GetSwitchValue(switches::kProxyServer);
+    proxy_info->UseNamedProxy(WideToASCII(proxy_server));
+  }
+
+  return proxy_info;
+}
+
+// static
+ChromeURLRequestContext* ChromeURLRequestContext::CreateOriginal(
+    Profile* profile, const std::wstring& cookie_store_path,
+    const std::wstring& disk_cache_path) {
+  DCHECK(!profile->IsOffTheRecord());
+  ChromeURLRequestContext* context = new ChromeURLRequestContext(profile);
+
+  scoped_ptr<net::ProxyInfo> proxy_info(CreateProxyInfo());
+  context->proxy_service_ = net::ProxyService::Create(proxy_info.get());
+
+  net::HttpCache* cache =
+      new net::HttpCache(context->proxy_service_, disk_cache_path, 0);
+
+  CommandLine command_line;
+  bool record_mode = chrome::kRecordModeEnabled &&
+                     command_line.HasSwitch(switches::kRecordMode);
+  bool playback_mode = command_line.HasSwitch(switches::kPlaybackMode);
+
+  if (record_mode || playback_mode) {
+    // Don't use existing cookies and use an in-memory store.
+    context->cookie_store_ = new net::CookieMonster();
+    cache->set_mode(
+        record_mode ? net::HttpCache::RECORD : net::HttpCache::PLAYBACK);
+  }
+  context->http_transaction_factory_ = cache;
+
+  // setup cookie store
+  if (!context->cookie_store_) {
+    DCHECK(!cookie_store_path.empty());
+    context->cookie_db_.reset(new SQLitePersistentCookieStore(
+        cookie_store_path, g_browser_process->db_thread()->message_loop()));
+    context->cookie_store_ = new net::CookieMonster(context->cookie_db_.get());
+  }
+
+  return context;
+}
+
+// static
+ChromeURLRequestContext* ChromeURLRequestContext::CreateOffTheRecord(
+    Profile* profile) {
+  DCHECK(profile->IsOffTheRecord());
+  ChromeURLRequestContext* context = new ChromeURLRequestContext(profile);
+
+  // Share the same proxy service as the original profile. This proxy
+  // service's lifespan is dependent on the lifespan of the original profile,
+  // which we reference (see above).
+  context->proxy_service_ =
+      profile->GetOriginalProfile()->GetRequestContext()->proxy_service();
+
+  context->http_transaction_factory_ =
+      new net::HttpCache(context->proxy_service_, 0);
+  context->cookie_store_ = new net::CookieMonster;
+
+  return context;
+}
+
+ChromeURLRequestContext::ChromeURLRequestContext(Profile* profile)
+    : prefs_(profile->GetPrefs()),
+      is_off_the_record_(profile->IsOffTheRecord()) {
+  user_agent_ = webkit_glue::GetUserAgent();
+
+  // set up Accept-Language and Accept-Charset header values
+  // TODO(jungshik) : This may slow down http requests. Perhaps,
+  // we have to come up with a better way to set up these values.
+  accept_language_ = WideToASCII(prefs_->GetString(prefs::kAcceptLanguages));
+  accept_charset_ = WideToASCII(prefs_->GetString(prefs::kDefaultCharset));
+  accept_charset_ += ",*,utf-8";
+
+  cookie_policy_.SetType(net::CookiePolicy::FromInt(
+      prefs_->GetInteger(prefs::kCookieBehavior)));
+
+  const ExtensionList* extensions =
+      profile->GetExtensionsService()->extensions();
+  for (ExtensionList::const_iterator iter = extensions->begin();
+      iter != extensions->end(); ++iter) {
+    extension_paths_[(*iter)->id()] = (*iter)->path();
+  }
+
+  prefs_->AddPrefObserver(prefs::kAcceptLanguages, this);
+  prefs_->AddPrefObserver(prefs::kCookieBehavior, this);  
+
+  NotificationService::current()->AddObserver(
+      this, NOTIFY_EXTENSIONS_LOADED, NotificationService::AllSources());
+}
+
+// NotificationObserver implementation.
+void ChromeURLRequestContext::Observe(NotificationType type,
+                                      const NotificationSource& source,
+                                      const NotificationDetails& details) {
+  if (NOTIFY_PREF_CHANGED == type) {
+    std::wstring* pref_name_in = Details<std::wstring>(details).ptr();
+    PrefService* prefs = Source<PrefService>(source).ptr();
+    DCHECK(pref_name_in && prefs);
+    if (*pref_name_in == prefs::kAcceptLanguages) {
+      std::string accept_language =
+          WideToASCII(prefs->GetString(prefs::kAcceptLanguages));
+      g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
+          NewRunnableMethod(this,
+                            &ChromeURLRequestContext::OnAcceptLanguageChange,
+                            accept_language));
+    } else if (*pref_name_in == prefs::kCookieBehavior) {
+      net::CookiePolicy::Type type = net::CookiePolicy::FromInt(
+          prefs_->GetInteger(prefs::kCookieBehavior));
+      g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
+          NewRunnableMethod(this,
+                            &ChromeURLRequestContext::OnCookiePolicyChange,
+                            type));
+    }
+  } else if (NOTIFY_EXTENSIONS_LOADED == type) {
+    ExtensionPaths* new_paths = new ExtensionPaths;
+    ExtensionList* extensions = Details<ExtensionList>(details).ptr();
+    DCHECK(extensions);
+    for (ExtensionList::const_iterator iter = extensions->begin();
+         iter != extensions->end(); ++iter) {
+      new_paths->insert(ExtensionPaths::value_type((*iter)->id(),
+                                                   (*iter)->path()));
+    }
+    g_browser_process->io_thread()->message_loop()->PostTask(FROM_HERE,
+        NewRunnableMethod(this, &ChromeURLRequestContext::OnNewExtensions,
+                          new_paths));
+  } else {
+    NOTREACHED();
+  }
+}
+
+void ChromeURLRequestContext::CleanupOnUIThread() {
+  // Unregister for pref notifications.
+  prefs_->RemovePrefObserver(prefs::kAcceptLanguages, this);
+  prefs_->RemovePrefObserver(prefs::kCookieBehavior, this);
+  prefs_ = NULL;
+
+  NotificationService::current()->RemoveObserver(
+      this, NOTIFY_EXTENSIONS_LOADED, NotificationService::AllSources());
+}
+
+FilePath ChromeURLRequestContext::GetPathForExtension(const std::string& id) {
+  ExtensionPaths::iterator iter = extension_paths_.find(id);
+  if (iter != extension_paths_.end()) {
+    return iter->second;
+  } else {
+    return FilePath();
+  }
+}
+
+void ChromeURLRequestContext::OnAcceptLanguageChange(std::string accept_language) {
+  DCHECK(MessageLoop::current() ==
+         ChromeThread::GetMessageLoop(ChromeThread::IO));
+  accept_language_ = accept_language;
+}
+
+void ChromeURLRequestContext::OnCookiePolicyChange(net::CookiePolicy::Type type) {
+  DCHECK(MessageLoop::current() ==
+         ChromeThread::GetMessageLoop(ChromeThread::IO));
+  cookie_policy_.SetType(type);
+}
+
+void ChromeURLRequestContext::OnNewExtensions(ExtensionPaths* new_paths) {
+  extension_paths_.insert(new_paths->begin(), new_paths->end());
+  delete new_paths;
+}
+
+ChromeURLRequestContext::~ChromeURLRequestContext() {
+  DCHECK(NULL == prefs_);
+
+  NotificationService::current()->Notify(NOTIFY_URL_REQUEST_CONTEXT_RELEASED,
+                                         Source<URLRequestContext>(this),
+                                         NotificationService::NoDetails());
+
+  delete cookie_store_;
+  delete http_transaction_factory_;
+
+  // Do not delete the proxy service in the case of OTR, as it is owned by the
+  // original URLRequestContext.
+  if (!is_off_the_record_)
+    delete proxy_service_;
+}