source: UsbWattMeter/trunk/curl-7.47.1/lib/http_chunks.h@ 164

Last change on this file since 164 was 164, checked in by coas-nagasima, 6 years ago

TOPPERS/ECNLサンプルアプリ「USB充電器電力計」を追加

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  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/x-chdr
File size: 3.0 KB
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1#ifndef HEADER_CURL_HTTP_CHUNKS_H
2#define HEADER_CURL_HTTP_CHUNKS_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
11 *
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at https://curl.haxx.se/docs/copyright.html.
15 *
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 ***************************************************************************/
24/*
25 * The longest possible hexadecimal number we support in a chunked transfer.
26 * Weird enough, RFC2616 doesn't set a maximum size! Since we use strtoul()
27 * to convert it, we "only" support 2^32 bytes chunk data.
28 */
29#define MAXNUM_SIZE 16
30
31typedef enum {
32 /* await and buffer all hexadecimal digits until we get one that isn't a
33 hexadecimal digit. When done, we go CHUNK_LF */
34 CHUNK_HEX,
35
36 /* wait for LF, ignore all else */
37 CHUNK_LF,
38
39 /* We eat the amount of data specified. When done, we move on to the
40 POST_CR state. */
41 CHUNK_DATA,
42
43 /* POSTLF should get a CR and then a LF and nothing else, then move back to
44 HEX as the CRLF combination marks the end of a chunk. A missing CR is no
45 big deal. */
46 CHUNK_POSTLF,
47
48 /* Used to mark that we're out of the game. NOTE: that there's a 'dataleft'
49 field in the struct that will tell how many bytes that were not passed to
50 the client in the end of the last buffer! */
51 CHUNK_STOP,
52
53 /* At this point optional trailer headers can be found, unless the next line
54 is CRLF */
55 CHUNK_TRAILER,
56
57 /* A trailer CR has been found - next state is CHUNK_TRAILER_POSTCR.
58 Next char must be a LF */
59 CHUNK_TRAILER_CR,
60
61 /* A trailer LF must be found now, otherwise CHUNKE_BAD_CHUNK will be
62 signalled If this is an empty trailer CHUNKE_STOP will be signalled.
63 Otherwise the trailer will be broadcasted via Curl_client_write() and the
64 next state will be CHUNK_TRAILER */
65 CHUNK_TRAILER_POSTCR
66} ChunkyState;
67
68typedef enum {
69 CHUNKE_STOP = -1,
70 CHUNKE_OK = 0,
71 CHUNKE_TOO_LONG_HEX = 1,
72 CHUNKE_ILLEGAL_HEX,
73 CHUNKE_BAD_CHUNK,
74 CHUNKE_WRITE_ERROR,
75 CHUNKE_BAD_ENCODING,
76 CHUNKE_OUT_OF_MEMORY,
77 CHUNKE_LAST
78} CHUNKcode;
79
80const char *Curl_chunked_strerror(CHUNKcode code);
81
82struct Curl_chunker {
83 char hexbuffer[ MAXNUM_SIZE + 1];
84 int hexindex;
85 ChunkyState state;
86 curl_off_t datasize;
87 size_t dataleft; /* untouched data amount at the end of the last buffer */
88};
89
90#endif /* HEADER_CURL_HTTP_CHUNKS_H */
91
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