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