chrome里面的about Scheme

ゝ一世哀愁。 2022-09-30 00:36 266阅读 0赞

对about Scheme进行处理的地方：

D:/project/chrome/src/src/chrome/browser/browser_url_handler.cc的void BrowserURLHandler::InitURLHandlers()函数

  1. // static
  2. void BrowserURLHandler::InitURLHandlers() {
  3.   if (!url_handlers_.empty())
  4.     return;
  6.   // Visual Studio 2010 has problems converting NULL to the null pointer for
  7.   // std::pair.  See http://connect.microsoft.com/VisualStudio/feedback/details/520043/error-converting-from-null-to-a-pointer-type-in-std-pair
  8.   // It will work if we pass nullptr.
  9. #if defined(_MSC_VER) && _MSC_VER >= 1600
  10.   URLHandler null_handler = nullptr;
  11. #else
  12.   URLHandler null_handler = NULL;
  13. #endif
  15.   // Add the default URL handlers.
  16.   url_handlers_.push_back(
  17.       HandlerPair(&ExtensionWebUI::HandleChromeURLOverride, null_handler));
  18.   // about:
  19.   url_handlers_.push_back(HandlerPair(&WillHandleBrowserAboutURL,
  20.                                       null_handler));
  21.   // chrome: & friends.
  22.   url_handlers_.push_back(HandlerPair(&HandleWebUI, null_handler));
  23.   // view-source:
  24.   url_handlers_.push_back(HandlerPair(&HandleViewSource, &ReverseViewSource));
  25. }

D:/project/chrome/src/src/chrome/browser/browser_about_handler.cc 的bool WillHandleBrowserAboutURL(GURL* url, Profile* profile)

  1. WillHandleBrowserAboutURL
  2. bool WillHandleBrowserAboutURL(GURL* url, Profile* profile) {
  3.   // We only handle about: schemes.
  4.   if (!url->SchemeIs(chrome::kAboutScheme))
  5.     return false;
  7.   // about:blank is special. Frames are allowed to access about:blank,
  8.   // but they are not allowed to access other types of about pages.
  9.   // Just ignore the about:blank and let the TAB_CONTENTS_WEB handle it.
  10.   if (LowerCaseEqualsASCII(url->spec(), chrome::kAboutBlankURL))
  11.     return false;
  13.   // Rewrite about:cache/* URLs to chrome://view-http-cache/*
  14.   if (StartsWithAboutSpecifier(*url, chrome::kAboutCacheURL)) {
  15.     *url = RemapAboutURL(chrome::kNetworkViewCacheURL, *url);
  16.     return true;
  17.   }
  19. #if defined(OS_WIN)
  20.   // Rewrite about:conflicts/* URLs to chrome://conflicts/*
  21.   if (StartsWithAboutSpecifier(*url, chrome::kAboutConflicts)) {
  22.     *url = GURL(chrome::kChromeUIConflictsURL);
  23.     return true;
  24.   }
  25. #endif
  27.   // Rewrite about:flags to chrome://flags/.
  28.   if (LowerCaseEqualsASCII(url->spec(), chrome::kAboutFlagsURL)) {
  29.     *url = GURL(chrome::kChromeUIFlagsURL);
  30.     return true;
  31.   }
  33.   // Rewrite about:net-internals/* URLs to chrome://net-internals/*
  34.   if (StartsWithAboutSpecifier(*url, chrome::kAboutNetInternalsURL)) {
  35.     *url = RemapAboutURL(chrome::kNetworkViewInternalsURL, *url);
  36.     return true;
  37.   }
  39.   // Rewrite about:gpu/* URLs to chrome://gpu-internals/*
  40.   if (StartsWithAboutSpecifier(*url, chrome::kAboutGpuURL)) {
  41.     *url = RemapAboutURL(chrome::kGpuInternalsURL, *url);
  42.     return true;
  43.   }
  45.   // Rewrite about:appcache-internals/* URLs to chrome://appcache/*
  46.   if (StartsWithAboutSpecifier(*url, chrome::kAboutAppCacheInternalsURL)) {
  47.     *url = RemapAboutURL(chrome::kAppCacheViewInternalsURL, *url);
  48.     return true;
  49.   }
  51.   // Rewrite about:sync-internals/* URLs (and about:sync, too, for
  52.   // legacy reasons) to chrome://sync-internals/*
  53.   if (StartsWithAboutSpecifier(*url, chrome::kAboutSyncInternalsURL) ||
  54.       StartsWithAboutSpecifier(*url, chrome::kAboutSyncURL)) {
  55.     *url = RemapAboutURL(chrome::kSyncViewInternalsURL, *url);
  56.     return true;
  57.   }
  59.   // Rewrite about:plugins to chrome://plugins/.
  60.   if (LowerCaseEqualsASCII(url->spec(), chrome::kAboutPluginsURL)) {
  61.     *url = GURL(chrome::kChromeUIPluginsURL);
  62.     return true;
  63.   }
  65.   // Handle URL to crash the browser process.
  66.   if (LowerCaseEqualsASCII(url->spec(), chrome::kAboutBrowserCrash)) {
  67.     // Induce an intentional crash in the browser process.
  68.     int* bad_pointer = NULL;
  69.     *bad_pointer = 42;
  70.     return true;
  71.   }
  73.   // Handle URLs to wreck the gpu process.
  74.   GpuProcessHostUIShim* gpu_ui_shim = GpuProcessHostUIShim::GetForRenderer(0);
  75.   if (gpu_ui_shim) {
  76.     if (LowerCaseEqualsASCII(url->spec(), chrome::kAboutGpuCrashURL)) {
  77.       gpu_ui_shim->SendAboutGpuCrash();
  78.       return true;
  79.     }
  80.     if (LowerCaseEqualsASCII(url->spec(), chrome::kAboutGpuHangURL)) {
  81.       gpu_ui_shim->SendAboutGpuHang();
  82.       return true;
  83.     }
  84.   }
  86.   // There are a few about: URLs that we hand over to the renderer. If the
  87.   // renderer wants them, don't do any rewriting.
  88.   if (chrome_about_handler::WillHandle(*url))
  89.     return false;
  91.   // Anything else requires our special handler; make sure it's initialized.
  92.   InitializeAboutDataSource(profile);
  94.   // Special case about:memory to go through a redirect before ending up on
  95.   // the final page. See GetAboutMemoryRedirectResponse above for why.
  96.   if (LowerCaseEqualsASCII(url->path(), kMemoryPath)) {
  97.     *url = GURL("chrome://about/memory-redirect");
  98.     return true;
  99.   }
  101.   // Rewrite the about URL to use chrome:. WebKit treats all about URLS the
  102.   // same (blank page), so if we want to display content, we need another
  103.   // scheme.
  104.   std::string about_url = "chrome://about/";
  105.   about_url.append(url->path());
  106.   *url = GURL(about_url);
  107.   return true;
  108. }

其中通过about:about可以看到所有支持的about Scheme。 about:net-internals， about:tcmalloc， about:gpu 可以了解很多chrome的细节。
image

这些about scheme的定义在D:/project/chrome/src/src/chrome/common/url_constants.cc ：

  1. url_constants.cc
  2. const char kAboutScheme[] = "about";
  3. const char kBlobScheme[] = "blob";
  4. const char kChromeDevToolsScheme[] = "chrome-devtools";
  5. const char kChromeInternalScheme[] = "chrome-internal";
  6. const char kChromeUIScheme[] = "chrome";
  7. const char kDataScheme[] = "data";
  8. const char kExtensionScheme[] = "chrome-extension";
  9. const char kFileScheme[] = "file";
  10. const char kFileSystemScheme[] = "filesystem";
  11. const char kFtpScheme[] = "ftp";
  12. const char kHttpScheme[] = "http";
  13. const char kHttpsScheme[] = "https";
  14. const char kJavaScriptScheme[] = "javascript";
  15. const char kMailToScheme[] = "mailto";
  16. const char kMetadataScheme[] = "metadata";
  17. const char kUserScriptScheme[] = "chrome-user-script";
  18. const char kViewSourceScheme[] = "view-source";
  20. #if defined(OS_CHROMEOS)
  21. const char kCrosScheme[] = "cros";
  22. #endif
  24. const char kStandardSchemeSeparator[] = "://";
  26. const char* kSavableSchemes[] = {
  27.   kHttpScheme,
  28.   kHttpsScheme,
  29.   kFileScheme,
  30.   kFtpScheme,
  31.   kExtensionScheme,
  32.   kChromeDevToolsScheme,
  33.   kChromeUIScheme,
  34.   NULL
  35. };
  37. const char kAboutAboutURL[] = "about:about";
  38. const char kAboutAppCacheInternalsURL[] = "about:appcache-internals";
  39. const char kAboutBlankURL[] = "about:blank";
  40. const char kAboutCacheURL[] = "about:cache";
  41. const char kAboutConflicts[] = "about:conflicts";
  42. const char kAboutCrashURL[] = "about:crash";
  43. const char kAboutKillURL[] = "about:kill";
  44. const char kAboutCreditsURL[] = "about:credits";
  45. const char kAboutDNSURL[] = "about:dns";
  46. const char kAboutFlagsURL[] = "about:flags";
  47. const char kAboutGpuURL[] = "about:gpu";
  48. const char kAboutGpuCrashURL[] = "about:gpucrash";
  49. const char kAboutGpuHangURL[] = "about:gpuhang";
  50. const char kAboutHangURL[] = "about:hang";
  51. const char kAboutHistogramsURL[] = "about:histograms";
  52. const char kAboutMemoryURL[] = "about:memory";
  53. const char kAboutNetInternalsURL[] = "about:net-internals";
  54. const char kAboutPluginsURL[] = "about:plugins";
  55. const char kAboutShorthangURL[] = "about:shorthang";
  56. const char kAboutSyncURL[] = "about:sync";
  57. const char kAboutSyncInternalsURL[] = "about:sync-internals";
  58. const char kAboutTermsURL[] = "about:terms";
  59. const char kAboutVersionURL[] = "about:version";
  61. // Use an obfuscated URL to make this nondiscoverable, we only want this
  62. // to be used for testing.
  63. const char kAboutBrowserCrash[] = "about:inducebrowsercrashforrealz";
  65. const char kChromeUIAboutAboutURL[] = "chrome://about/about";
  66. const char kChromeUIAboutCreditsURL[] = "chrome://about/credits";
  67. const char kChromeUIAboutURL[] = "chrome://settings/about";
  68. const char kChromeUIAppLauncherURL[] = "chrome://newtab/#mode=app-launcher";
  69. const char kChromeUIBookmarksURL[] = "chrome://bookmarks/";
  70. const char kChromeUIBugReportURL[] = "chrome://bugreport/";
  71. const char kChromeUIConflictsURL[] = "chrome://conflicts/";
  72. const char kChromeUIConstrainedHTMLTestURL[] = "chrome://constrained-test/";
  73. const char kChromeUICrashesURL[] = "chrome://crashes/";
  74. const char kChromeUIDevToolsURL[] = "chrome-devtools://devtools/";
  75. const char kChromeUIDownloadsURL[] = "chrome://downloads/";
  76. const char kChromeUIExtensionIconURL[] = "chrome://extension-icon/";
  77. const char kChromeUIExtensionsURL[] = "chrome://extensions/";
  78. const char kChromeUIFavIconURL[] = "chrome://favicon/";
  79. const char kChromeUIFlagsURL[] = "chrome://flags/";
  80. const char kChromeUIHistory2URL[] = "chrome://history2/";
  81. const char kChromeUIHistoryURL[] = "chrome://history/";
  82. const char kChromeUIIPCURL[] = "chrome://about/ipc";
  83. const char kChromeUIKeyboardURL[] = "chrome://keyboard/";
  84. const char kChromeUINewTabURL[] = "chrome://newtab";
  85. const char kChromeUIPluginsURL[] = "chrome://plugins/";
  86. const char kChromeUIPrintURL[] = "chrome://print/";
  87. const char kChromeUISettingsURL[] = "chrome://settings/";
  88. const char kChromeUITextfieldsURL[] = "chrome://textfields/";
  90. #if defined(OS_CHROMEOS)
  91. const char kChromeUIAboutOSCreditsURL[] = "chrome://about/os-credits";
  92. const char kChromeUIActivationMessage[] = "chrome://activationmessage/";
  93. const char kChromeUIFileBrowseURL[] = "chrome://filebrowse/";
  94. const char kChromeUICollectedCookiesURL[] = "chrome://collected-cookies/";
  95. const char kChromeUIImageBurnerURL[] = "chrome://imageburner/";
  96. const char kChromeUIKeyboardOverlayURL[] = "chrome://keyboardoverlay/";
  97. const char kChromeUIMediaplayerURL[] = "chrome://mediaplayer/";
  98. const char kChromeUIMobileSetupURL[] = "chrome://mobilesetup/";
  99. const char kChromeUIRegisterPageURL[] = "chrome://register/";
  100. const char kChromeUISlideshowURL[] = "chrome://slideshow/";
  101. const char kChromeUISystemInfoURL[] = "chrome://system/";
  102. const char kChromeUIUserImageURL[] = "chrome://userimage/";
  103. #endif
  105. // Keep this list sorted please.
  106. const char kChromeUIBookmarksHost[] = "bookmarks";
  107. const char kChromeUIBugReportHost[] = "bugreport";
  108. const char kChromeUIConflictsHost[] = "conflicts";
  109. const char kChromeUICrashesHost[] = "crashes";
  110. const char kChromeUIDevToolsHost[] = "devtools";
  111. const char kChromeUIDialogHost[] = "dialog";
  112. const char kChromeUIDownloadsHost[] = "downloads";
  113. const char kChromeUIExtensionIconHost[] = "extension-icon";
  114. const char kChromeUIExtensionsHost[] = "extensions";
  115. const char kChromeUIFavIconHost[] = "favicon";
  116. const char kChromeUIFlagsHost[] = "flags";
  117. const char kChromeUIGpuInternalsHost[] = "gpu-internals";
  118. const char kChromeUIHistoryHost[] = "history";
  119. const char kChromeUIHistory2Host[] = "history2";
  120. const char kChromeUIInspectorHost[] = "inspector";
  121. const char kChromeUIKeyboardHost[] = "keyboard";
  122. const char kChromeUINetInternalsHost[] = "net-internals";
  123. const char kChromeUINewTabHost[] = "newtab";
  124. const char kChromeUIPluginsHost[] = "plugins";
  125. const char kChromeUIPrintHost[] = "print";
  126. const char kChromeUIRemotingHost[] = "remoting";
  127. const char kChromeUIRemotingResourcesHost[] = "remotingresources";
  128. const char kChromeUIResourcesHost[] = "resources";
  129. const char kChromeUIScreenshotPath[] = "screenshots";
  130. const char kChromeUISettingsHost[] = "settings";
  131. const char kChromeUISyncInternalsHost[] = "sync-internals";
  132. const char kChromeUISyncResourcesHost[] = "syncresources";
  133. const char kChromeUITextfieldsHost[] = "textfields";
  134. const char kChromeUIThemePath[] = "theme";
  135. const char kChromeUIThumbnailPath[] = "thumb";
  137. #if defined(OS_CHROMEOS)
  138. const char kChromeUIActivationMessageHost[] = "activationmessage";
  139. const char kChromeUICollectedCookiesHost[] = "collected-cookies";
  140. const char kChromeUIFileBrowseHost[] = "filebrowse";
  141. const char kChromeUIImageBurnerHost[] = "imageburner";
  142. const char kChromeUIKeyboardOverlayHost[] = "keyboardoverlay";
  143. const char kChromeUIMediaplayerHost[] = "mediaplayer";
  144. const char kChromeUIMobileSetupHost[] = "mobilesetup";
  145. const char kChromeUIRegisterPageHost[] = "register";
  146. const char kChromeUISlideshowHost[] = "slideshow";
  147. const char kChromeUISystemInfoHost[] = "system";
  148. const char kChromeUIMenu[] = "menu";
  149. const char kChromeUIWrenchMenu[] = "wrench-menu";
  150. const char kChromeUINetworkMenu[] = "network-menu";
  151. const char kChromeUIUserImageHost[] = "userimage";
  152. #endif
  154. #if defined(OS_CHROMEOS) && defined(TOUCH_UI)
  155. const char kChromeUILoginContainerHost[] = "login-container";
  156. const char kChromeUILoginHost[] = "login";
  157. #endif
  159. const char kUnreachableWebDataURL[] = "chrome://chromewebdata/";
  161. const char kAppCacheViewInternalsURL[] = "chrome://appcache-internals/";
  163. const char kBlobViewInternalsURL[] = "chrome://blob-internals/";
  165. const char kCloudPrintResourcesURL[] = "chrome://cloudprintresources/";
  166. const char kCloudPrintResourcesHost[] = "cloudprintresources";
  167. const char kCloudPrintSetupHost[] = "cloudprintsetup";
  169. const char kNetworkViewInternalsURL[] = "chrome://net-internals/";
  170. const char kNetworkViewCacheURL[] = "chrome://view-http-cache/";
  172. const char kSyncViewInternalsURL[] = "chrome://sync-internals/";
  174. // GPU sub pages
  175. const char kGpuInternalsURL[] = "chrome://gpu-internals/";
  177. // Option sub pages.
  178. const char kAdvancedOptionsSubPage[] =  "advanced";
  179. const char kAutoFillSubPage[] = "autofill";
  180. const char kBrowserOptionsSubPage[] =  "browser";
  181. const char kClearBrowserDataSubPage[] = "clearBrowserData";
  182. const char kContentSettingsSubPage[] = "content";
  183. const char kContentSettingsExceptionsSubPage[] = "contentExceptions";
  184. const char kDefaultOptionsSubPage[] =  "";
  185. const char kImportDataSubPage[] = "importData";
  186. const char kInstantConfirmPage[] = "instantConfirm";
  187. const char kLanguageOptionsSubPage[] = "languages";
  188. const char kPersonalOptionsSubPage[] =  "personal";
  189. const char kPasswordManagerSubPage[] =  "passwords";
  190. const char kSearchEnginesSubPage[] = "searchEngines";
  191. #if defined(OS_CHROMEOS)
  192. const char kInternetOptionsSubPage[] = "internet";
  193. const char kSystemOptionsSubPage[] = "system";
  194. #endif
  196. const char kChromeHelpURL[] =
  197. #if defined(OS_CHROMEOS)
  198.   "http://www.google.com/support/chromeos/";
  199. #else
  200.   "http://www.google.com/support/chrome/";
  201. #endif
  203.   const char kPageInfoHelpCenterURL[] =
  204. #if defined(OS_CHROMEOS)
  205.     "http://www.google.com/support/chromeos/bin/answer.py?answer=95617";
  206. #else
  207.     "http://www.google.com/support/chrome/bin/answer.py?answer=95617";
  208. #endif
  210. const char kCrashReasonURL[] =
  211. #if defined(OS_CHROMEOS)
  212.     "http://www.google.com/support/chromeos/bin/answer.py?answer=1047340";
  213. #else
  214.     "http://www.google.com/support/chrome/bin/answer.py?answer=95669";
  215. #endif
  217. // TODO: These are currently placeholders that point to the crash
  218. // docs.  See bug http://crosbug.com/10711
  219. const char kKillReasonURL[] =
  220. #if defined(OS_CHROMEOS)
  221.     "http://www.google.com/support/chromeos/bin/answer.py?answer=1047340";
  222. #else
  223.     "http://www.google.com/support/chrome/bin/answer.py?answer=95669";
  224. #endif
  226. const char kPrivacyLearnMoreURL[] =
  227. #if defined(OS_CHROMEOS)
  228.     "http://www.google.com/support/chromeos/bin/answer.py?answer=1047334";
  229. #else
  230.     "http://www.google.com/support/chrome/bin/answer.py?answer=114836";
  231. #endif
  233. const char kChromiumProjectURL[] = "http://code.google.com/chromium/";
  235. const char kLearnMoreReportingURL[] =
  236.     "http://www.google.com/support/chrome/bin/answer.py?answer=96817";
  238. const char kOutdatedPluginLearnMoreURL[] =
  239.     "http://www.google.com/support/chrome/bin/answer.py?answer=1181003";

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