Add a Content API around BrowserURLHandler.

content/browser/browser_url_handler.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/browser/browser_url_handler.h"
-
-#include "base/string_util.h"
-#include "content/browser/webui/web_ui_impl.h"
-#include "content/public/browser/content_browser_client.h"
-#include "content/public/common/url_constants.h"
-#include "googleurl/src/gurl.h"
-
-// Handles rewriting view-source URLs for what we'll actually load.
-static bool HandleViewSource(GURL* url,
-                             content::BrowserContext* browser_context) {
-  if (url->SchemeIs(chrome::kViewSourceScheme)) {
-    // Load the inner URL instead.
-    *url = GURL(url->path());
-
-    // Bug 26129: limit view-source to view the content and not any
-    // other kind of 'active' url scheme like 'javascript' or 'data'.
-    static const char* const allowed_sub_schemes[] = {
-      chrome::kHttpScheme, chrome::kHttpsScheme, chrome::kFtpScheme,
-      chrome::kChromeDevToolsScheme, chrome::kChromeUIScheme,
-      chrome::kFileScheme
-    };
-
-    bool is_sub_scheme_allowed = false;
-    for (size_t i = 0; i < arraysize(allowed_sub_schemes); i++) {
-      if (url->SchemeIs(allowed_sub_schemes[i])) {
-        is_sub_scheme_allowed = true;
-        break;
-      }
-    }
-
-    if (!is_sub_scheme_allowed) {
-      *url = GURL(chrome::kAboutBlankURL);
-      return false;
-    }
-
-    return true;
-  }
-  return false;
-}
-
-// Turns a non view-source URL into the corresponding view-source URL.
-static bool ReverseViewSource(GURL* url,
-                              content::BrowserContext* browser_context) {
-  // No action necessary if the URL is already view-source:
-  if (url->SchemeIs(chrome::kViewSourceScheme))
-    return false;
-
-  url_canon::Replacements<char> repl;
-  repl.SetScheme(chrome::kViewSourceScheme,
-      url_parse::Component(0, strlen(chrome::kViewSourceScheme)));
-  repl.SetPath(url->spec().c_str(),
-      url_parse::Component(0, url->spec().size()));
-  *url = url->ReplaceComponents(repl);
-  return true;
-}
-
-static bool HandleDebugUrl(GURL* url,
-                           content::BrowserContext* browser_context) {
-  // Circumvent processing URLs that the renderer process will handle.
-  return *url == GURL(chrome::kChromeUICrashURL) ||
-         *url == GURL(chrome::kChromeUIHangURL) ||
-         *url == GURL(chrome::kChromeUIKillURL) ||
-         *url == GURL(chrome::kChromeUIShorthangURL);
-}
-
-// static
-BrowserURLHandler* BrowserURLHandler::GetInstance() {
-  return Singleton<BrowserURLHandler>::get();
-}
-
-// static
-BrowserURLHandler::URLHandler BrowserURLHandler::null_handler() {
-  // Required for VS2010: http://connect.microsoft.com/VisualStudio/feedback/details/520043/error-converting-from-null-to-a-pointer-type-in-std-pair
-  return NULL;
-}
-
-BrowserURLHandler::BrowserURLHandler() {
-  AddHandlerPair(&HandleDebugUrl, BrowserURLHandler::null_handler());
-
-  content::GetContentClient()->browser()->BrowserURLHandlerCreated(this);
-
-  // view-source:
-  AddHandlerPair(&HandleViewSource, &ReverseViewSource);
-}
-
-BrowserURLHandler::~BrowserURLHandler() {
-}
-
-void BrowserURLHandler::AddHandlerPair(URLHandler handler,
-                                       URLHandler reverse_handler) {
-  url_handlers_.push_back(HandlerPair(handler, reverse_handler));
-}
-
-void BrowserURLHandler::RewriteURLIfNecessary(
-    GURL* url,
-    content::BrowserContext* browser_context,
-    bool* reverse_on_redirect) {
-  for (size_t i = 0; i < url_handlers_.size(); ++i) {
-    URLHandler handler = *url_handlers_[i].first;
-    if (handler && handler(url, browser_context)) {
-      *reverse_on_redirect = (url_handlers_[i].second != NULL);
-      return;
-    }
-  }
-}
-
-bool BrowserURLHandler::ReverseURLRewrite(
-    GURL* url, const GURL& original, content::BrowserContext* browser_context) {
-  for (size_t i = 0; i < url_handlers_.size(); ++i) {
-    URLHandler reverse_rewriter = *url_handlers_[i].second;
-    if (reverse_rewriter) {
-      GURL test_url(original);
-      URLHandler handler = *url_handlers_[i].first;
-      if (!handler) {
-        if (reverse_rewriter(url, browser_context))
-          return true;
-      } else if (handler(&test_url, browser_context)) {
-        return reverse_rewriter(url, browser_context);
-      }
-    }
-  }
-  return false;
-}