| 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 - 2022, Daniel Stenberg, <[email protected]>, 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.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 | * SPDX-License-Identifier: curl
|
|---|
| 24 | *
|
|---|
| 25 | ***************************************************************************/
|
|---|
| 26 |
|
|---|
| 27 | struct connectdata;
|
|---|
| 28 |
|
|---|
| 29 | /*
|
|---|
| 30 | * The longest possible hexadecimal number we support in a chunked transfer.
|
|---|
| 31 | * Neither RFC2616 nor the later HTTP specs define a maximum chunk size.
|
|---|
| 32 | * For 64 bit curl_off_t we support 16 digits. For 32 bit, 8 digits.
|
|---|
| 33 | */
|
|---|
| 34 | #define CHUNK_MAXNUM_LEN (SIZEOF_CURL_OFF_T * 2)
|
|---|
| 35 |
|
|---|
| 36 | typedef enum {
|
|---|
| 37 | /* await and buffer all hexadecimal digits until we get one that isn't a
|
|---|
| 38 | hexadecimal digit. When done, we go CHUNK_LF */
|
|---|
| 39 | CHUNK_HEX,
|
|---|
| 40 |
|
|---|
| 41 | /* wait for LF, ignore all else */
|
|---|
| 42 | CHUNK_LF,
|
|---|
| 43 |
|
|---|
| 44 | /* We eat the amount of data specified. When done, we move on to the
|
|---|
| 45 | POST_CR state. */
|
|---|
| 46 | CHUNK_DATA,
|
|---|
| 47 |
|
|---|
| 48 | /* POSTLF should get a CR and then a LF and nothing else, then move back to
|
|---|
| 49 | HEX as the CRLF combination marks the end of a chunk. A missing CR is no
|
|---|
| 50 | big deal. */
|
|---|
| 51 | CHUNK_POSTLF,
|
|---|
| 52 |
|
|---|
| 53 | /* Used to mark that we're out of the game. NOTE: that there's a 'datasize'
|
|---|
| 54 | field in the struct that will tell how many bytes that were not passed to
|
|---|
| 55 | the client in the end of the last buffer! */
|
|---|
| 56 | CHUNK_STOP,
|
|---|
| 57 |
|
|---|
| 58 | /* At this point optional trailer headers can be found, unless the next line
|
|---|
| 59 | is CRLF */
|
|---|
| 60 | CHUNK_TRAILER,
|
|---|
| 61 |
|
|---|
| 62 | /* A trailer CR has been found - next state is CHUNK_TRAILER_POSTCR.
|
|---|
| 63 | Next char must be a LF */
|
|---|
| 64 | CHUNK_TRAILER_CR,
|
|---|
| 65 |
|
|---|
| 66 | /* A trailer LF must be found now, otherwise CHUNKE_BAD_CHUNK will be
|
|---|
| 67 | signalled If this is an empty trailer CHUNKE_STOP will be signalled.
|
|---|
| 68 | Otherwise the trailer will be broadcasted via Curl_client_write() and the
|
|---|
| 69 | next state will be CHUNK_TRAILER */
|
|---|
| 70 | CHUNK_TRAILER_POSTCR
|
|---|
| 71 | } ChunkyState;
|
|---|
| 72 |
|
|---|
| 73 | typedef enum {
|
|---|
| 74 | CHUNKE_STOP = -1,
|
|---|
| 75 | CHUNKE_OK = 0,
|
|---|
| 76 | CHUNKE_TOO_LONG_HEX = 1,
|
|---|
| 77 | CHUNKE_ILLEGAL_HEX,
|
|---|
| 78 | CHUNKE_BAD_CHUNK,
|
|---|
| 79 | CHUNKE_BAD_ENCODING,
|
|---|
| 80 | CHUNKE_OUT_OF_MEMORY,
|
|---|
| 81 | CHUNKE_PASSTHRU_ERROR, /* Curl_httpchunk_read() returns a CURLcode to use */
|
|---|
| 82 | CHUNKE_LAST
|
|---|
| 83 | } CHUNKcode;
|
|---|
| 84 |
|
|---|
| 85 | const char *Curl_chunked_strerror(CHUNKcode code);
|
|---|
| 86 |
|
|---|
| 87 | struct Curl_chunker {
|
|---|
| 88 | curl_off_t datasize;
|
|---|
| 89 | ChunkyState state;
|
|---|
| 90 | unsigned char hexindex;
|
|---|
| 91 | char hexbuffer[ CHUNK_MAXNUM_LEN + 1]; /* +1 for null-terminator */
|
|---|
| 92 | };
|
|---|
| 93 |
|
|---|
| 94 | /* The following functions are defined in http_chunks.c */
|
|---|
| 95 | void Curl_httpchunk_init(struct Curl_easy *data);
|
|---|
| 96 | CHUNKcode Curl_httpchunk_read(struct Curl_easy *data, char *datap,
|
|---|
| 97 | ssize_t length, ssize_t *wrote,
|
|---|
| 98 | CURLcode *passthru);
|
|---|
| 99 |
|
|---|
| 100 | #endif /* HEADER_CURL_HTTP_CHUNKS_H */
|
|---|
