1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/*
* Copyright 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef HTTP_DOWNLOADER_H_
#define HTTP_DOWNLOADER_H_
#include <media/stagefright/foundation/ADebug.h>
#include <utils/KeyedVector.h>
#include <utils/Mutex.h>
#include <utils/RefBase.h>
namespace android {
struct ABuffer;
class DataSource;
struct HTTPBase;
struct IMediaHTTPService;
struct M3UParser;
struct HTTPDownloader : public RefBase {
HTTPDownloader(
const sp<IMediaHTTPService> &httpService,
const KeyedVector<String8, String8> &headers);
void reconnect();
void disconnect();
bool isDisconnecting();
// If given a non-zero block_size (default 0), it is used to cap the number of
// bytes read in from the DataSource. If given a non-NULL buffer, new content
// is read into the end.
//
// The DataSource we read from is responsible for signaling error or EOF to help us
// break out of the read loop. The DataSource can be returned to the caller, so
// that the caller can reuse it for subsequent fetches (within the initially
// requested range).
//
// For reused HTTP sources, the caller must download a file sequentially without
// any overlaps or gaps to prevent reconnection.
ssize_t fetchBlock(
const char *url,
sp<ABuffer> *out,
int64_t range_offset, /* open file at range_offset */
int64_t range_length, /* open file for range_length (-1: entire file) */
uint32_t block_size, /* download block size (0: entire range) */
String8 *actualUrl, /* returns actual URL */
bool reconnect /* force connect http */
);
// simplified version to fetch a single file
ssize_t fetchFile(
const char *url,
sp<ABuffer> *out,
String8 *actualUrl = NULL);
// fetch a playlist file
sp<M3UParser> fetchPlaylist(
const char *url, uint8_t *curPlaylistHash, bool *unchanged);
private:
sp<HTTPBase> mHTTPDataSource;
sp<DataSource> mDataSource;
KeyedVector<String8, String8> mExtraHeaders;
Mutex mLock;
bool mDisconnecting;
DISALLOW_EVIL_CONSTRUCTORS(HTTPDownloader);
};
} // namespace android
#endif // HTTP_DOWNLOADER_H_
|
