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
WillHandleBrowserAboutURL(GURL * url,content::BrowserContext * browser_context)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
HandleNonNavigationAboutURL(const GURL & url)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 // chrome://ipc/ is currently buggy, so we disable it for official builds.
107 #if !defined(OFFICIAL_BUILD)
108
109 #if (defined(OS_MACOSX) || defined(OS_WIN)) && defined(IPC_MESSAGE_LOG_ENABLED)
110 if (LowerCaseEqualsASCII(spec, chrome::kChromeUIIPCURL)) {
111 // Run the dialog. This will re-use the existing one if it's already up.
112 chrome::ShowAboutIPCDialog();
113 return true;
114 }
115 #endif
116
117 #endif // OFFICIAL_BUILD
118
119 return false;
120 }
121