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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef STORAGE_BROWSER_BLOB_BLOB_URL_REQUEST_JOB_H_ | 5 #ifndef STORAGE_BROWSER_BLOB_BLOB_URL_REQUEST_JOB_H_ |
6 #define STORAGE_BROWSER_BLOB_BLOB_URL_REQUEST_JOB_H_ | 6 #define STORAGE_BROWSER_BLOB_BLOB_URL_REQUEST_JOB_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
11 #include "base/memory/scoped_ptr.h" | 11 #include "base/memory/scoped_ptr.h" |
12 #include "base/memory/weak_ptr.h" | 12 #include "base/memory/weak_ptr.h" |
13 #include "net/http/http_byte_range.h" | 13 #include "net/http/http_byte_range.h" |
14 #include "net/http/http_status_code.h" | 14 #include "net/http/http_status_code.h" |
15 #include "net/url_request/url_request_job.h" | 15 #include "net/url_request/url_request_job.h" |
| 16 #include "storage/browser/blob/blob_data_snapshot.h" |
16 #include "storage/browser/storage_browser_export.h" | 17 #include "storage/browser/storage_browser_export.h" |
17 | 18 |
18 namespace base { | 19 namespace base { |
19 class SingleThreadTaskRunner; | 20 class SingleThreadTaskRunner; |
20 } | 21 } |
21 | 22 |
22 namespace net { | 23 namespace net { |
23 class DrainableIOBuffer; | 24 class DrainableIOBuffer; |
24 class IOBuffer; | 25 class IOBuffer; |
25 } | 26 } |
26 | 27 |
27 namespace storage { | 28 namespace storage { |
28 | 29 |
29 class BlobDataHandle; | |
30 class BlobReader; | |
31 class FileStreamReader; | 30 class FileStreamReader; |
32 class FileSystemContext; | 31 class FileSystemContext; |
33 | 32 |
34 // A request job that handles reading blob URLs. | 33 // A request job that handles reading blob URLs. |
35 class STORAGE_EXPORT BlobURLRequestJob | 34 class STORAGE_EXPORT BlobURLRequestJob |
36 : public net::URLRequestJob { | 35 : public net::URLRequestJob { |
37 public: | 36 public: |
38 BlobURLRequestJob(net::URLRequest* request, | 37 BlobURLRequestJob(net::URLRequest* request, |
39 net::NetworkDelegate* network_delegate, | 38 net::NetworkDelegate* network_delegate, |
40 BlobDataHandle* blob_handle, | 39 scoped_ptr<BlobDataSnapshot> blob_data, |
41 storage::FileSystemContext* file_system_context, | 40 storage::FileSystemContext* file_system_context, |
42 base::SingleThreadTaskRunner* resolving_thread_task_runner); | 41 base::SingleThreadTaskRunner* resolving_thread_task_runner); |
43 | 42 |
44 // net::URLRequestJob methods. | 43 // net::URLRequestJob methods. |
45 void Start() override; | 44 void Start() override; |
46 void Kill() override; | 45 void Kill() override; |
47 bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read) override; | 46 bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read) override; |
48 bool GetMimeType(std::string* mime_type) const override; | 47 bool GetMimeType(std::string* mime_type) const override; |
49 void GetResponseInfo(net::HttpResponseInfo* info) override; | 48 void GetResponseInfo(net::HttpResponseInfo* info) override; |
50 int GetResponseCode() const override; | 49 int GetResponseCode() const override; |
51 void SetExtraRequestHeaders(const net::HttpRequestHeaders& headers) override; | 50 void SetExtraRequestHeaders(const net::HttpRequestHeaders& headers) override; |
52 | 51 |
53 protected: | 52 protected: |
54 ~BlobURLRequestJob() override; | 53 ~BlobURLRequestJob() override; |
55 | 54 |
56 private: | 55 private: |
57 typedef std::map<size_t, FileStreamReader*> IndexToReaderMap; | 56 typedef std::map<size_t, FileStreamReader*> IndexToReaderMap; |
58 | 57 |
59 // For preparing for read: get the size, apply the range and perform seek. | 58 // For preparing for read: get the size, apply the range and perform seek. |
60 void DidStart(); | 59 void DidStart(); |
61 void DidCalculateSize(int result); | 60 bool AddItemLength(size_t index, int64 item_length); |
62 void DidReadRawData(int result); | 61 bool CountSize(); |
| 62 void DidCountSize(int error); |
| 63 void DidGetFileItemLength(size_t index, int64 result); |
| 64 void Seek(int64 offset); |
63 | 65 |
| 66 // For reading the blob. |
| 67 bool ReadLoop(int* bytes_read); |
| 68 bool ReadItem(); |
| 69 void AdvanceItem(); |
| 70 void AdvanceBytesRead(int result); |
| 71 bool ReadBytesItem(const BlobDataItem& item, int bytes_to_read); |
| 72 |
| 73 bool ReadFileItem(FileStreamReader* reader, int bytes_to_read); |
| 74 void DidReadFile(int chunk_number, int result); |
| 75 void DeleteCurrentFileReader(); |
| 76 |
| 77 bool ReadDiskCacheEntryItem(const BlobDataItem& item, int bytes_to_read); |
| 78 void DidReadDiskCacheEntry(int result); |
| 79 |
| 80 int ComputeBytesToRead() const; |
| 81 int BytesReadCompleted(); |
| 82 |
| 83 // These methods convert the result of blob data reading into response headers |
| 84 // and pass it to URLRequestJob's NotifyDone() or NotifyHeadersComplete(). |
| 85 void NotifySuccess(); |
64 void NotifyFailure(int); | 86 void NotifyFailure(int); |
65 void HeadersCompleted(net::HttpStatusCode status_code); | 87 void HeadersCompleted(net::HttpStatusCode status_code); |
66 | 88 |
| 89 // Returns a FileStreamReader for a blob item at |index|. |
| 90 // If the item at |index| is not of file this returns NULL. |
| 91 FileStreamReader* GetFileStreamReader(size_t index); |
| 92 |
| 93 // Creates a FileStreamReader for the item at |index| with additional_offset. |
| 94 // If failed, then returns false. |
| 95 bool CreateFileStreamReader(size_t index, int64 additional_offset); |
| 96 |
| 97 scoped_ptr<BlobDataSnapshot> blob_data_; |
| 98 |
| 99 // Variables for controlling read from |blob_data_|. |
| 100 scoped_refptr<storage::FileSystemContext> file_system_context_; |
| 101 scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_; |
| 102 std::vector<int64> item_length_list_; |
| 103 int64 total_size_; |
| 104 int64 remaining_bytes_; |
| 105 int pending_get_file_info_count_; |
| 106 IndexToReaderMap index_to_reader_; |
| 107 size_t current_item_index_; |
| 108 int64 current_item_offset_; |
| 109 |
| 110 // Holds the buffer for read data with the IOBuffer interface. |
| 111 scoped_refptr<net::DrainableIOBuffer> read_buf_; |
| 112 |
67 // Is set when NotifyFailure() is called and reset when DidStart is called. | 113 // Is set when NotifyFailure() is called and reset when DidStart is called. |
68 bool error_; | 114 bool error_; |
69 | 115 |
70 bool byte_range_set_; | 116 bool byte_range_set_; |
71 net::HttpByteRange byte_range_; | 117 net::HttpByteRange byte_range_; |
72 | 118 |
73 scoped_ptr<BlobDataHandle> blob_handle_; | 119 // Used to create unique id's for tracing. |
74 scoped_ptr<BlobReader> blob_reader_; | 120 int current_file_chunk_number_; |
| 121 |
75 scoped_ptr<net::HttpResponseInfo> response_info_; | 122 scoped_ptr<net::HttpResponseInfo> response_info_; |
76 | 123 |
77 base::WeakPtrFactory<BlobURLRequestJob> weak_factory_; | 124 base::WeakPtrFactory<BlobURLRequestJob> weak_factory_; |
78 | 125 |
79 DISALLOW_COPY_AND_ASSIGN(BlobURLRequestJob); | 126 DISALLOW_COPY_AND_ASSIGN(BlobURLRequestJob); |
80 }; | 127 }; |
81 | 128 |
82 } // namespace storage | 129 } // namespace storage |
83 | 130 |
84 #endif // STORAGE_BROWSER_BLOB_BLOB_URL_REQUEST_JOB_H_ | 131 #endif // STORAGE_BROWSER_BLOB_BLOB_URL_REQUEST_JOB_H_ |
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