net/spdy/spdy_credential_state.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 NET_SPDY_SPDY_CREDENTIAL_STATE_H_
   6 #define NET_SPDY_SPDY_CREDENTIAL_STATE_H_
   7
   8 #include <vector>
   9
  10 #include "googleurl/src/gurl.h"
  11 #include "net/base/net_export.h"
  12
  13 namespace net {
  14
  15 // A class for tracking the credentials associated with a SPDY session.
  16 class NET_EXPORT_PRIVATE SpdyCredentialState {
  17  public:
  18   explicit SpdyCredentialState(size_t num_slots);
  19   ~SpdyCredentialState();
  20
  21   // Changes the number of credentials being tracked.  If the new size is
  22   // larger, then empty slots will be added to the end.  If the new size is
  23   // smaller than the current size, then the extra slots will be truncated
  24   // from the end.
  25   void Resize(size_t size);
  26
  27   // Returns the one-based index in |slots_| for |url| or kNoEntry, if no entry
  28   // for |url| exists.
  29   size_t FindCredentialSlot(const GURL& url) const;
  30
  31   // Returns true if there is a credential associated with |url|.
  32   bool HasCredential(const GURL& url) const;
  33
  34   // Adds the new credentials to be associated with all origins matching
  35   // |url|.  If there is space, then it will add in the first available
  36   // position.  Otherwise, an existing credential will be evicted.  Returns
  37   // the slot in which this domain was added.
  38   size_t SetHasCredential(const GURL& url);
  39
  40   // This value is defined as the default initial value in the SPDY spec unless
  41   // otherwise negotiated via SETTINGS.
  42   static const size_t kDefaultNumSlots;
  43
  44   // Sentinel value to be returned by FindCredentialSlot when no entry exists.
  45   static const size_t kNoEntry;
  46
  47  private:
  48   // Vector of origins that have credentials.
  49   std::vector<GURL> slots_;
  50   // Index of the last origin added to |slots_|.
  51   size_t last_added_;
  52 };
  53
  54 }  // namespace net
  55
  56 #endif  // NET_SPDY_SPDY_CREDENTIAL_STATE_H_