chrome/browser/browsing_data/browsing_data_cookie_helper.h

   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 #ifndef CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COOKIE_HELPER_H_
   6 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COOKIE_HELPER_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/callback.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "chrome/browser/browsing_data/canonical_cookie_hash.h"
  15 #include "net/cookies/cookie_monster.h"
  16
  17 class GURL;
  18
  19 namespace net {
  20 class CanonicalCookie;
  21 class URLRequestContextGetter;
  22 }
  23
  24 // This class fetches cookie information on behalf of a caller
  25 // on the UI thread.
  26 // A client of this class need to call StartFetching from the UI thread to
  27 // initiate the flow, and it'll be notified by the callback in its UI
  28 // thread at some later point.
  29 class BrowsingDataCookieHelper
  30     : public base::RefCountedThreadSafe<BrowsingDataCookieHelper> {
  31  public:
  32   explicit BrowsingDataCookieHelper(
  33       net::URLRequestContextGetter* request_context_getter);
  34
  35   // Starts the fetching process, which will notify its completion via
  36   // callback.
  37   // This must be called only in the UI thread.
  38   virtual void StartFetching(
  39       const base::Callback<void(const net::CookieList& cookies)>& callback);
  40
  41   // Requests a single cookie to be deleted in the IO thread. This must be
  42   // called in the UI thread.
  43   virtual void DeleteCookie(const net::CanonicalCookie& cookie);
  44
  45  protected:
  46   friend class base::RefCountedThreadSafe<BrowsingDataCookieHelper>;
  47   virtual ~BrowsingDataCookieHelper();
  48
  49   net::URLRequestContextGetter* request_context_getter() {
  50     return request_context_getter_.get();
  51   }
  52
  53  private:
  54   // Fetch the cookies. This must be called in the IO thread.
  55   void FetchCookiesOnIOThread();
  56
  57   // Callback function for get cookie. This must be called in the IO thread.
  58   void OnFetchComplete(const net::CookieList& cookies);
  59
  60   // Notifies the completion callback. This must be called in the UI thread.
  61   void NotifyInUIThread(const net::CookieList& cookies);
  62
  63   // Delete a single cookie. This must be called in IO thread.
  64   void DeleteCookieOnIOThread(const net::CanonicalCookie& cookie);
  65
  66   // Indicates whether or not we're currently fetching information:
  67   // it's true when StartFetching() is called in the UI thread, and it's reset
  68   // after we notify the callback in the UI thread.
  69   // This member is only mutated on the UI thread.
  70   bool is_fetching_;
  71
  72   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
  73
  74   // This member is only mutated on the UI thread.
  75   base::Callback<void(const net::CookieList& cookies)> completion_callback_;
  76
  77   DISALLOW_COPY_AND_ASSIGN(BrowsingDataCookieHelper);
  78 };
  79
  80 // This class is a thin wrapper around BrowsingDataCookieHelper that does not
  81 // fetch its information from the persistent cookie store. It is a simple
  82 // container for CanonicalCookies. Clients that use this container can add
  83 // cookies that are sent to a server via the AddReadCookies method and cookies
  84 // that are received from a server or set via JavaScript using the method
  85 // AddChangedCookie.
  86 // Cookies are distinguished by the tuple cookie name (called cookie-name in
  87 // RFC 6265), cookie domain (called cookie-domain in RFC 6265), cookie path
  88 // (called cookie-path in RFC 6265) and host-only-flag (see RFC 6265 section
  89 // 5.3). Cookies with same tuple (cookie-name, cookie-domain, cookie-path,
  90 // host-only-flag) as cookie that are already stored, will replace the stored
  91 // cookies.
  92 class CannedBrowsingDataCookieHelper : public BrowsingDataCookieHelper {
  93  public:
  94   typedef std::map<GURL, canonical_cookie::CookieHashSet*> OriginCookieSetMap;
  95
  96   explicit CannedBrowsingDataCookieHelper(
  97       net::URLRequestContextGetter* request_context);
  98
  99   // Adds the cookies from |cookie_list|. Current cookies that have the same
 100   // cookie name, cookie domain, cookie path, host-only-flag tuple as passed
 101   // cookies are replaced by the passed cookies.
 102   void AddReadCookies(const GURL& frame_url,
 103                       const GURL& request_url,
 104                       const net::CookieList& cookie_list);
 105
 106   // Adds a CanonicalCookie that is created from the passed |cookie_line|
 107   // (called set-cookie-string in RFC 6225). The |cookie_line| is parsed,
 108   // normalized and validated. Invalid |cookie_line|s are ignored. The logic
 109   // for parsing, normalizing an validating the |cookie_line| mirrors the logic
 110   // of CookieMonster's method SetCookieWithOptions. If the |cookie_line| does
 111   // not include a cookie domain attribute (called domain-av in RFC 6265) or a
 112   // cookie path (called path-av in RFC 6265), then the host and the
 113   // default-path of the request-uri are used as domain-value and path-value
 114   // for the cookie. CanonicalCookies created from a |cookie_line| with no
 115   // cookie domain attribute are host only cookies.
 116   // TODO(markusheintz): Remove the dublicated logic.
 117   void AddChangedCookie(const GURL& frame_url,
 118                         const GURL& request_url,
 119                         const std::string& cookie_line,
 120                         const net::CookieOptions& options);
 121
 122   // Clears the list of canned cookies.
 123   void Reset();
 124
 125   // True if no cookie are currently stored.
 126   bool empty() const;
 127
 128   // BrowsingDataCookieHelper methods.
 129   void StartFetching(
 130       const net::CookieMonster::GetCookieListCallback& callback) override;
 131   void DeleteCookie(const net::CanonicalCookie& cookie) override;
 132
 133   // Returns the number of stored cookies.
 134   size_t GetCookieCount() const;
 135
 136   // Returns the map that contains the cookie lists for all frame urls.
 137   const OriginCookieSetMap& origin_cookie_set_map() {
 138     return origin_cookie_set_map_;
 139   }
 140
 141  private:
 142   // Check if the cookie set contains a cookie with the same name,
 143   // domain, and path as the newly created cookie. Delete the old cookie
 144   // if does.
 145   bool DeleteMatchingCookie(const net::CanonicalCookie& add_cookie,
 146                             canonical_cookie::CookieHashSet* cookie_set);
 147
 148   ~CannedBrowsingDataCookieHelper() override;
 149
 150   // Returns the |CookieSet| for the given |origin|.
 151   canonical_cookie::CookieHashSet* GetCookiesFor(const GURL& origin);
 152
 153   // Adds the |cookie| to the cookie set for the given |frame_url|.
 154   void AddCookie(const GURL& frame_url,
 155                  const net::CanonicalCookie& cookie);
 156
 157   // Map that contains the cookie sets for all frame origins.
 158   OriginCookieSetMap origin_cookie_set_map_;
 159
 160   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataCookieHelper);
 161 };
 162
 163 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COOKIE_HELPER_H_