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/bind.h"
  10 #include "base/location.h"
  11 #include "base/logging.h"
  12 #include "base/single_thread_task_runner.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/thread_task_runner_handle.h"
  15 #include "chrome/browser/lifetime/application_lifetime.h"
  16 #include "chrome/browser/ui/browser_dialogs.h"
  17 #include "chrome/common/chrome_switches.h"
  18 #include "chrome/common/url_constants.h"
  19 #include "components/url_formatter/url_fixer.h"
  20
  21 bool FixupBrowserAboutURL(GURL* url,
  22                           content::BrowserContext* browser_context) {
  23   // Ensure that any cleanup done by FixupURL happens before the rewriting
  24   // phase that determines the virtual URL, by including it in an initial
  25   // URLHandler.  This prevents minor changes from producing a virtual URL,
  26   // which could lead to a URL spoof.
  27   *url = url_formatter::FixupURL(url->possibly_invalid_spec(), std::string());
  28   return true;
  29 }
  30
  31 bool WillHandleBrowserAboutURL(GURL* url,
  32                                content::BrowserContext* browser_context) {
  33   // TODO(msw): Eliminate "about:*" constants and literals from code and tests,
  34   //            then hopefully we can remove this forced fixup.
  35   FixupBrowserAboutURL(url, browser_context);
  36
  37   // Check that about: URLs are fixed up to chrome: by url_formatter::FixupURL.
  38   DCHECK((*url == GURL(url::kAboutBlankURL)) ||
  39          !url->SchemeIs(url::kAboutScheme));
  40
  41   // Only handle chrome://foo/, url_formatter::FixupURL translates about:foo.
  42   if (!url->SchemeIs(content::kChromeUIScheme))
  43     return false;
  44
  45   std::string host(url->host());
  46   std::string path;
  47   // Replace about with chrome-urls.
  48   if (host == chrome::kChromeUIAboutHost)
  49     host = chrome::kChromeUIChromeURLsHost;
  50   // Replace cache with view-http-cache.
  51   if (host == chrome::kChromeUICacheHost) {
  52     host = content::kChromeUINetworkViewCacheHost;
  53   // Replace sync with sync-internals (for legacy reasons).
  54   } else if (host == chrome::kChromeUISyncHost) {
  55     host = chrome::kChromeUISyncInternalsHost;
  56   // Redirect chrome://extensions.
  57   } else if (host == chrome::kChromeUIExtensionsHost) {
  58     // If the material design extensions page is enabled, it gets its own host.
  59     // Otherwise, it's handled by the uber settings page.
  60     if (::switches::MdExtensionsEnabled()) {
  61       host = chrome::kChromeUIExtensionsHost;
  62       path = url->path();
  63     } else {
  64       host = chrome::kChromeUIUberHost;
  65       path = chrome::kChromeUIExtensionsHost + url->path();
  66     }
  67   // Redirect chrome://settings/extensions (legacy URL).
  68   } else if (host == chrome::kChromeUISettingsHost &&
  69       url->path() == std::string("/") + chrome::kExtensionsSubPage) {
  70     host = chrome::kChromeUIUberHost;
  71     path = chrome::kChromeUIExtensionsHost;
  72   // Redirect chrome://history.
  73   } else if (host == chrome::kChromeUIHistoryHost) {
  74 #if defined(OS_ANDROID)
  75     // On Android, redirect directly to chrome://history-frame since
  76     // uber page is unsupported.
  77     host = chrome::kChromeUIHistoryFrameHost;
  78 #else
  79     host = chrome::kChromeUIUberHost;
  80     path = chrome::kChromeUIHistoryHost + url->path();
  81 #endif
  82   // Redirect chrome://settings
  83   } else if (host == chrome::kChromeUISettingsHost) {
  84     if (::switches::AboutInSettingsEnabled()) {
  85       host = chrome::kChromeUISettingsFrameHost;
  86     } else {
  87       host = chrome::kChromeUIUberHost;
  88       path = chrome::kChromeUISettingsHost + url->path();
  89     }
  90   // Redirect chrome://help
  91   } else if (host == chrome::kChromeUIHelpHost) {
  92     if (::switches::AboutInSettingsEnabled()) {
  93       host = chrome::kChromeUISettingsFrameHost;
  94       if (url->path().empty() || url->path() == "/")
  95         path = chrome::kChromeUIHelpHost;
  96     } else {
  97       host = chrome::kChromeUIUberHost;
  98       path = chrome::kChromeUIHelpHost + url->path();
  99     }
 100   }
 101
 102   GURL::Replacements replacements;
 103   replacements.SetHostStr(host);
 104   if (!path.empty())
 105     replacements.SetPathStr(path);
 106   *url = url->ReplaceComponents(replacements);
 107
 108   // Having re-written the URL, make the chrome: handler process it.
 109   return false;
 110 }
 111
 112 bool HandleNonNavigationAboutURL(const GURL& url) {
 113   const std::string spec(url.spec());
 114
 115   if (base::LowerCaseEqualsASCII(spec, chrome::kChromeUIRestartURL)) {
 116     // Call AttemptRestart after chrome::Navigate() completes to avoid access of
 117     // gtk objects after they are destroyed by BrowserWindowGtk::Close().
 118     base::ThreadTaskRunnerHandle::Get()->PostTask(
 119         FROM_HERE, base::Bind(&chrome::AttemptRestart));
 120     return true;
 121   } else if (base::LowerCaseEqualsASCII(spec, chrome::kChromeUIQuitURL)) {
 122     base::ThreadTaskRunnerHandle::Get()->PostTask(
 123         FROM_HERE, base::Bind(&chrome::AttemptExit));
 124     return true;
 125   }
 126
 127   return false;
 128 }