chrome/browser/browser_about_handler.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 "chrome/browser/browser_about_handler.h"
   6
   7 #include <string>
   8
   9 #include "base/logging.h"
  10 #include "base/strings/string_util.h"
  11 #include "chrome/browser/lifetime/application_lifetime.h"
  12 #include "chrome/browser/ui/browser_dialogs.h"
  13 #include "chrome/common/chrome_switches.h"
  14 #include "chrome/common/url_constants.h"
  15 #include "components/url_fixer/url_fixer.h"
  16
  17 bool WillHandleBrowserAboutURL(GURL* url,
  18                                content::BrowserContext* browser_context) {
  19   // TODO(msw): Eliminate "about:*" constants and literals from code and tests,
  20   //            then hopefully we can remove this forced fixup.
  21   *url = url_fixer::FixupURL(url->possibly_invalid_spec(), std::string());
  22
  23   // Check that about: URLs are fixed up to chrome: by url_fixer::FixupURL.
  24   DCHECK((*url == GURL(url::kAboutBlankURL)) ||
  25          !url->SchemeIs(url::kAboutScheme));
  26
  27   // Only handle chrome://foo/, url_fixer::FixupURL translates about:foo.
  28   if (!url->SchemeIs(content::kChromeUIScheme))
  29     return false;
  30
  31   std::string host(url->host());
  32   std::string path;
  33   // Replace about with chrome-urls.
  34   if (host == chrome::kChromeUIAboutHost)
  35     host = chrome::kChromeUIChromeURLsHost;
  36   // Replace cache with view-http-cache.
  37   if (host == chrome::kChromeUICacheHost) {
  38     host = content::kChromeUINetworkViewCacheHost;
  39   // Replace sync with sync-internals (for legacy reasons).
  40   } else if (host == chrome::kChromeUISyncHost) {
  41     host = chrome::kChromeUISyncInternalsHost;
  42   // Redirect chrome://extensions.
  43   } else if (host == chrome::kChromeUIExtensionsHost) {
  44     host = chrome::kChromeUIUberHost;
  45     path = chrome::kChromeUIExtensionsHost + url->path();
  46   // Redirect chrome://settings/extensions (legacy URL).
  47   } else if (host == chrome::kChromeUISettingsHost &&
  48       url->path() == std::string("/") + chrome::kExtensionsSubPage) {
  49     host = chrome::kChromeUIUberHost;
  50     path = chrome::kChromeUIExtensionsHost;
  51   // Redirect chrome://history.
  52   } else if (host == chrome::kChromeUIHistoryHost) {
  53 #if defined(OS_ANDROID)
  54     // On Android, redirect directly to chrome://history-frame since
  55     // uber page is unsupported.
  56     host = chrome::kChromeUIHistoryFrameHost;
  57 #else
  58     host = chrome::kChromeUIUberHost;
  59     path = chrome::kChromeUIHistoryHost + url->path();
  60 #endif
  61   // Redirect chrome://settings
  62   } else if (host == chrome::kChromeUISettingsHost) {
  63     if (::switches::AboutInSettingsEnabled()) {
  64       host = chrome::kChromeUISettingsFrameHost;
  65     } else {
  66       host = chrome::kChromeUIUberHost;
  67       path = chrome::kChromeUISettingsHost + url->path();
  68     }
  69   // Redirect chrome://help
  70   } else if (host == chrome::kChromeUIHelpHost) {
  71     if (::switches::AboutInSettingsEnabled()) {
  72       host = chrome::kChromeUISettingsFrameHost;
  73       if (url->path().empty() || url->path() == "/")
  74         path = chrome::kChromeUIHelpHost;
  75     } else {
  76       host = chrome::kChromeUIUberHost;
  77       path = chrome::kChromeUIHelpHost + url->path();
  78     }
  79   }
  80
  81   GURL::Replacements replacements;
  82   replacements.SetHostStr(host);
  83   if (!path.empty())
  84     replacements.SetPathStr(path);
  85   *url = url->ReplaceComponents(replacements);
  86
  87   // Having re-written the URL, make the chrome: handler process it.
  88   return false;
  89 }
  90
  91 bool HandleNonNavigationAboutURL(const GURL& url) {
  92   const std::string spec(url.spec());
  93
  94   if (LowerCaseEqualsASCII(spec, chrome::kChromeUIRestartURL)) {
  95     // Call AttemptRestart after chrome::Navigate() completes to avoid access of
  96     // gtk objects after they are destroyed by BrowserWindowGtk::Close().
  97     base::MessageLoop::current()->PostTask(FROM_HERE,
  98         base::Bind(&chrome::AttemptRestart));
  99     return true;
 100   } else if (LowerCaseEqualsASCII(spec, chrome::kChromeUIQuitURL)) {
 101     base::MessageLoop::current()->PostTask(FROM_HERE,
 102         base::Bind(&chrome::AttemptExit));
 103     return true;
 104   }
 105
 106   return false;
 107 }