components/google/core/browser/google_util.h

   1 // Copyright 2014 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 // Some Google related utility functions.
   6
   7 #ifndef COMPONENTS_GOOGLE_CORE_BROWSER_GOOGLE_UTIL_H_
   8 #define COMPONENTS_GOOGLE_CORE_BROWSER_GOOGLE_UTIL_H_
   9
  10 #include <string>
  11
  12 #include "base/basictypes.h"
  13
  14 class GURL;
  15
  16 // This namespace provides various helpers around handling Google-related URLs.
  17 namespace google_util {
  18
  19 // True iff |str| contains a "q=" or "as_q=" query parameter with a non-empty
  20 // value. |str| should be a query or a hash fragment, without the ? or # (as
  21 // returned by GURL::query() or GURL::ref().
  22 bool HasGoogleSearchQueryParam(const std::string& str);
  23
  24 // The query key that identifies a Google Extended API request for Instant.
  25 const char kInstantExtendedAPIParam[] = "espv";
  26
  27 GURL LinkDoctorBaseURL();
  28 void SetMockLinkDoctorBaseURLForTesting();
  29
  30 // Returns the Google locale corresponding to |application_locale|.  This is
  31 // the same string as AppendGoogleLocaleParam adds to the URL, only without the
  32 // leading "hl".
  33 std::string GetGoogleLocale(const std::string& application_locale);
  34
  35 // Adds the Google locale string to the URL (e.g., hl=en-US).  This does not
  36 // check to see if the param already exists.
  37 GURL AppendGoogleLocaleParam(const GURL& url,
  38                              const std::string& application_locale);
  39
  40 // Returns the Google country code string for the given Google homepage URL.
  41 std::string GetGoogleCountryCode(GURL google_homepage_url);
  42
  43 // Returns the Google search URL for the given Google homepage URL.
  44 GURL GetGoogleSearchURL(GURL google_homepage_url);
  45
  46 // Returns the Google base URL specified on the command line, if it exists.
  47 // This performs some fixup and sanity-checking to ensure that the resulting URL
  48 // is valid and has no query or ref.
  49 GURL CommandLineGoogleBaseURL();
  50
  51 // Returns true if a Google base URL was specified on the command line and |url|
  52 // begins with that base URL.  This uses a simple string equality check.
  53 bool StartsWithCommandLineGoogleBaseURL(const GURL& url);
  54
  55 // WARNING: The following IsGoogleXXX() functions use heuristics to rule out
  56 // "obviously false" answers.  They do NOT guarantee that the string in question
  57 // is actually on a Google-owned domain, just that it looks plausible.  If you
  58 // need to restrict some behavior to only happen on Google's officially-owned
  59 // domains, use TransportSecurityState::IsGooglePinnedProperty() instead.
  60
  61 // Designate whether or not a URL checking function also checks for specific
  62 // subdomains, or only "www" and empty subdomains.
  63 enum SubdomainPermission {
  64   ALLOW_SUBDOMAIN,
  65   DISALLOW_SUBDOMAIN,
  66 };
  67
  68 // Designate whether or not a URL checking function also checks for standard
  69 // ports (80 for http, 443 for https), or if it allows all port numbers.
  70 enum PortPermission {
  71   ALLOW_NON_STANDARD_PORTS,
  72   DISALLOW_NON_STANDARD_PORTS,
  73 };
  74
  75 // True if |host| is "[www.]google.<TLD>" with a valid TLD. If
  76 // |subdomain_permission| is ALLOW_SUBDOMAIN, we check against host
  77 // "*.google.<TLD>" instead.
  78 //
  79 // If the Google base URL has been overridden on the command line, this function
  80 // will also return true for any URL whose hostname exactly matches the hostname
  81 // of the URL specified on the command line.  In this case,
  82 // |subdomain_permission| is ignored.
  83 bool IsGoogleHostname(const std::string& host,
  84                       SubdomainPermission subdomain_permission);
  85
  86 // True if |url| is a valid URL with a host that returns true for
  87 // IsGoogleHostname(), and an HTTP or HTTPS scheme.  If |port_permission| is
  88 // DISALLOW_NON_STANDARD_PORTS, this also requires |url| to use the standard
  89 // port for its scheme (80 for HTTP, 443 for HTTPS).
  90 //
  91 // Note that this only checks for google.<TLD> domains, but not other Google
  92 // properties. There is code in variations_http_header_provider.cc that checks
  93 // for additional Google properties, which can be moved here if more callers
  94 // are interested in this in the future.
  95 bool IsGoogleDomainUrl(const GURL& url,
  96                        SubdomainPermission subdomain_permission,
  97                        PortPermission port_permission);
  98
  99 // True if |url| represents a valid Google home page URL.
 100 bool IsGoogleHomePageUrl(const GURL& url);
 101
 102 // True if |url| represents a valid Google search URL.
 103 bool IsGoogleSearchUrl(const GURL& url);
 104
 105 // True if |url| is a valid youtube.<TLD> URL.  If |port_permission| is
 106 // DISALLOW_NON_STANDARD_PORTS, this also requires |url| to use the standard
 107 // port for its scheme (80 for HTTP, 443 for HTTPS).
 108 bool IsYoutubeDomainUrl(const GURL& url,
 109                         SubdomainPermission subdomain_permission,
 110                         PortPermission port_permission);
 111
 112 }  // namespace google_util
 113
 114 #endif  // COMPONENTS_GOOGLE_CORE_BROWSER_GOOGLE_UTIL_H_