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