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105 lines
3.4 KiB
C
105 lines
3.4 KiB
C
#ifndef __HTTP_CHUNKS_H
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#define __HTTP_CHUNKS_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2005, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* $Id$
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***************************************************************************/
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/*
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* The longest possible hexadecimal number we support in a chunked transfer.
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* Weird enough, RFC2616 doesn't set a maximum size! Since we use strtoul()
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* to convert it, we "only" support 2^32 bytes chunk data.
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*/
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#define MAXNUM_SIZE 16
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typedef enum {
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CHUNK_FIRST, /* never use */
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/* In this we await and buffer all hexadecimal digits until we get one
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that isn't a hexadecimal digit. When done, we go POSTHEX */
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CHUNK_HEX,
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/* We have received the hexadecimal digit and we eat all characters until
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we get a CRLF pair. When we see a CR we go to the CR state. */
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CHUNK_POSTHEX,
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/* A single CR has been found and we should get a LF right away in this
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state or we go back to POSTHEX. When LF is received, we go to DATA.
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If the size given was zero, we set state to STOP and return. */
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CHUNK_CR,
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/* We eat the amount of data specified. When done, we move on to the
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POST_CR state. */
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CHUNK_DATA,
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/* POSTCR should get a CR and nothing else, then move to POSTLF */
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CHUNK_POSTCR,
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/* POSTLF should get a LF and nothing else, then move back to HEX as the
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CRLF combination marks the end of a chunk */
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CHUNK_POSTLF,
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/* This is mainly used to really mark that we're out of the game.
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NOTE: that there's a 'dataleft' field in the struct that will tell how
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many bytes that were not passed to the client in the end of the last
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buffer! */
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CHUNK_STOP,
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/* At this point optional trailer headers can be found, unless the next line
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is CRLF */
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CHUNK_TRAILER,
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/* A trailer CR has been found - next state is CHUNK_TRAILER_POSTCR.
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Next char must be a LF */
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CHUNK_TRAILER_CR,
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/* A trailer LF must be found now, otherwise CHUNKE_BAD_CHUNK will be
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signalled If this is an empty trailer CHUNKE_STOP will be signalled.
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Otherwise the trailer will be broadcasted via Curl_client_write() and the
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next state will be CHUNK_TRAILER */
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CHUNK_TRAILER_POSTCR,
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CHUNK_LAST /* never use */
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} ChunkyState;
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typedef enum {
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CHUNKE_STOP = -1,
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CHUNKE_OK = 0,
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CHUNKE_TOO_LONG_HEX = 1,
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CHUNKE_ILLEGAL_HEX,
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CHUNKE_BAD_CHUNK,
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CHUNKE_WRITE_ERROR,
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CHUNKE_STATE_ERROR,
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CHUNKE_BAD_ENCODING,
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CHUNKE_OUT_OF_MEMORY,
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CHUNKE_LAST
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} CHUNKcode;
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struct Curl_chunker {
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char hexbuffer[ MAXNUM_SIZE + 1];
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int hexindex;
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ChunkyState state;
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size_t datasize;
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size_t dataleft; /* untouched data amount at the end of the last buffer */
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};
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#endif
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