OLD | NEW |
(Empty) | |
| 1 // Copyright 2015 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 MEDIA_BLINK_URL_INDEX_H_ |
| 6 #define MEDIA_BLINK_URL_INDEX_H_ |
| 7 |
| 8 #include <map> |
| 9 #include <vector> |
| 10 #include "base/memory/ref_counted.h" |
| 11 #include "base/threading/thread_checker.h" |
| 12 #include "media/blink/lru.h" |
| 13 #include "url/gurl.h" |
| 14 |
| 15 namespace media { |
| 16 |
| 17 #ifndef MEDIA_BLINK_BUFFERED_RESOURCE_LOADER_H_ |
| 18 const int64 kPositionNotSpecified = -1; |
| 19 #endif |
| 20 |
| 21 class UrlIndex; |
| 22 |
| 23 class UrlData : public base::RefCounted<UrlData> { |
| 24 public: |
| 25 // Keep in sync with WebMediaPlayer::CORSMode. |
| 26 enum CORSMode { kUnspecified, kAnonymous, kUseCredentials }; |
| 27 typedef std::pair<GURL, CORSMode> KeyType; |
| 28 |
| 29 const GURL url() const { return url_; } |
| 30 const GURL redirects_to() const { return redirects_to_; } |
| 31 CORSMode cors_mode() const { return cors_mode_; } |
| 32 bool range_supported() const { return range_supported_; } |
| 33 bool cacheable() const { return cacheable_; } |
| 34 base::TimeTicks last_used() const { return last_used_; } |
| 35 base::Time last_modified() const { return last_modified_; } |
| 36 base::TimeTicks valid_until() const { return valid_until_; } |
| 37 KeyType key() const; |
| 38 |
| 39 // Notifies the url index that this is currently used. |
| 40 // The URL will get a new ID if this is not called |
| 41 // regularly. |
| 42 void Use(); |
| 43 |
| 44 // Length of data associated with url or |kPositionNotSpecified| |
| 45 int64 length() const { return length_; } |
| 46 |
| 47 // DO NOT call this function unless the redirect is to the same |
| 48 // origin or a CORS check has been performed. |
| 49 void set_redirects_to(const GURL& url); |
| 50 |
| 51 void set_range_supported(); |
| 52 void set_length(int64 length); |
| 53 void set_cacheable(bool cacheable); |
| 54 void set_valid_until(base::TimeTicks t); |
| 55 |
| 56 // Set the last_modified time on |urldata|. This also allows the url |
| 57 // index to re-use previously expired UrlData instances. If such |
| 58 // an instance is discovered, it is returned, otherwise |urldata| |
| 59 // is returned. |
| 60 scoped_refptr<UrlData> set_last_modified(base::Time last_modified); |
| 61 |
| 62 // Returns true it is valid to keep using this to access cached data. |
| 63 // A single media player instance may choose to ignore this for resources |
| 64 // that have already been opened. |
| 65 bool Valid() const; |
| 66 |
| 67 private: |
| 68 friend class UrlIndex; |
| 69 friend class RefCounted<UrlData>; |
| 70 |
| 71 ~UrlData(); |
| 72 UrlData(const GURL& url, |
| 73 CORSMode cors_mode_, |
| 74 UrlIndex* url_index_); |
| 75 void set_last_modified_internal(base::Time t); |
| 76 void DisconnectFromIndex(); |
| 77 |
| 78 const GURL url_; |
| 79 const CORSMode cors_mode_; |
| 80 |
| 81 GURL redirects_to_; |
| 82 int64 length_; |
| 83 bool range_supported_; |
| 84 bool cacheable_; |
| 85 |
| 86 base::TimeTicks last_used_; |
| 87 base::TimeTicks valid_until_; |
| 88 base::Time last_modified_; |
| 89 |
| 90 base::ThreadChecker thread_checker_; |
| 91 UrlIndex* url_index_; |
| 92 DISALLOW_COPY_AND_ASSIGN(UrlData); |
| 93 }; |
| 94 |
| 95 // The UrlIndex lets you look up UrlData instances by url. |
| 96 // It keeps a weak reference to UrlData that it has returned. |
| 97 // Since the multibuffer cache key contains an UrlData reference |
| 98 // we can be sure that UrlData instances with zero references |
| 99 // do not have any cached data associated with them, and they |
| 100 // can safely be removed from the UrlIndex. |
| 101 class UrlIndex { |
| 102 public: |
| 103 UrlIndex(); |
| 104 ~UrlIndex(); |
| 105 // Creates a new UrlData if not found. |
| 106 // |last_modified| may be null if not known. |
| 107 // Normally you'll want to call Use() on the returned object right away. |
| 108 scoped_refptr<UrlData> GetByUrl(const GURL& gurl, |
| 109 UrlData::CORSMode cors_mode); |
| 110 |
| 111 |
| 112 private: |
| 113 friend class UrlData; |
| 114 void RemoveUrlData(const UrlData* url_data); |
| 115 // TODO(hubbe): Add support for etag validation. |
| 116 scoped_refptr<UrlData> SetLastModified(scoped_refptr<UrlData> urldata, |
| 117 base::Time last_modified); |
| 118 |
| 119 std::map<UrlData::KeyType, UrlData*> by_url_; |
| 120 std::map<UrlData::KeyType, UrlData*> with_last_modified_; |
| 121 std::list<scoped_refptr<UrlData> > to_prune_; |
| 122 bool prune_cb_active_; |
| 123 }; |
| 124 |
| 125 } // namespace media |
| 126 #endif // MEDIA_BLINK_URL_INDEX_H_ |
OLD | NEW |