chrome/browser/prerender/prerender_util.h

   1 // Copyright (c) 2011 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 #ifndef CHROME_BROWSER_PRERENDER_PRERENDER_UTIL_H_
   6 #define CHROME_BROWSER_PRERENDER_PRERENDER_UTIL_H_
   7
   8 #include "base/basictypes.h"
   9 #include "url/gurl.h"
  10 #include "webkit/common/resource_type.h"
  11
  12 namespace net {
  13 class HttpResponseHeaders;
  14 class URLRequest;
  15 }
  16
  17 namespace prerender {
  18
  19 extern const char kChromeNavigateExtraDataKey[];
  20
  21 // ID indicating that no experiment is active.
  22 const uint8 kNoExperiment = 0;
  23
  24 // Extracts a urlencoded URL stored in a url= query parameter from a URL
  25 // supplied, if available, and stores it in alias_url.  Returns whether or not
  26 // the operation succeeded (i.e. a valid URL was found).
  27 bool MaybeGetQueryStringBasedAliasURL(const GURL& url, GURL* alias_url);
  28
  29 // Extracts an experiment stored in the query parameter
  30 // lpe= from the URL supplied, and returns it.
  31 // Returns kNoExperiment if no experiment ID is found, or if the ID
  32 // is not an integer in the range 1 to 9.
  33 uint8 GetQueryStringBasedExperiment(const GURL& url);
  34
  35 // Indicates whether the URL provided has a Google domain
  36 bool IsGoogleDomain(const GURL& url);
  37
  38 // Indicates whether the URL provided could be a Google search result page.
  39 bool IsGoogleSearchResultURL(const GURL& url);
  40
  41 // The prerender contents of some experiments should never be swapped in
  42 // by pretending to never match on the URL.  This function will return true
  43 // iff this is the case for the experiment_id specified.
  44 bool IsNoSwapInExperiment(uint8 experiment_id);
  45
  46 // The prerender contents of some experiments should behave identical to the
  47 // control group, regardless of the field trial.  This function will return true
  48 // iff this is the case for the experiment_id specified.
  49 bool IsControlGroupExperiment(uint8 experiment_id);
  50
  51 // Called by URLRequestResponseStarted to gather data about Pagespeed headers
  52 // into the Prerender.PagespeedHeader histogram. Public so it can be accessed
  53 // by the unit test.
  54 void GatherPagespeedData(const ResourceType::Type resource_type,
  55                          const GURL& request_url,
  56                          const net::HttpResponseHeaders* response_headers);
  57
  58 // Static method gathering stats about a URLRequest for which a response has
  59 // just started.
  60 void URLRequestResponseStarted(net::URLRequest* request);
  61
  62 // Report a URL was canceled due to trying to handle an external URL.
  63 void ReportPrerenderExternalURL();
  64
  65 // Report a URL was canceled due to unsupported prerender scheme.
  66 void ReportUnsupportedPrerenderScheme(const GURL& url);
  67
  68 }  // namespace prerender
  69
  70 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_UTIL_H_