Source/CTest/Curl/http_chunks.h

   1 #ifndef __HTTP_CHUNKS_H
   2 #define __HTTP_CHUNKS_H
   3 /***************************************************************************
   4  *                                  _   _ ____  _
   5  *  Project                     ___| | | |  _ \| |
   6  *                             / __| | | | |_) | |
   7  *                            | (__| |_| |  _ <| |___
   8  *                             \___|\___/|_| \_\_____|
   9  *
  10  * Copyright (C) 1998 - 2002, 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 http://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  * $Id: http_chunks.h,v 1.3 2003-01-14 14:12:37 andy Exp $
  24  ***************************************************************************/
  25 /*
  26  * The longest possible hexadecimal number we support in a chunked transfer.
  27  * Weird enough, RFC2616 doesn't set a maximum size! Since we use strtoul()
  28  * to convert it, we "only" support 2^32 bytes chunk data.
  29  */
  30 #define MAXNUM_SIZE 16
  31
  32 typedef enum {
  33   CHUNK_FIRST, /* never use */
  34
  35   /* In this we await and buffer all hexadecimal digits until we get one
  36      that isn't a hexadecimal digit. When done, we go POSTHEX */
  37   CHUNK_HEX,
  38
  39   /* We have received the hexadecimal digit and we eat all characters until
  40      we get a CRLF pair. When we see a CR we go to the CR state. */
  41   CHUNK_POSTHEX,
  42
  43   /* A single CR has been found and we should get a LF right away in this
  44      state or we go back to POSTHEX. When LF is received, we go to DATA.
  45      If the size given was zero, we set state to STOP and return. */
  46   CHUNK_CR,
  47
  48   /* We eat the amount of data specified. When done, we move on to the
  49      POST_CR state. */
  50   CHUNK_DATA,
  51
  52   /* POSTCR should get a CR and nothing else, then move to POSTLF */
  53   CHUNK_POSTCR,
  54
  55   /* POSTLF should get a LF and nothing else, then move back to HEX as
  56      the CRLF combination marks the end of a chunk */
  57   CHUNK_POSTLF,
  58
  59   /* This is mainly used to really mark that we're out of the game.
  60      NOTE: that there's a 'dataleft' field in the struct that will tell how
  61      many bytes that were not passed to the client in the end of the last
  62      buffer! */
  63   CHUNK_STOP,
  64
  65   CHUNK_LAST /* never use */
  66 } ChunkyState;
  67
  68 typedef 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_STATE_ERROR,
  76   CHUNKE_BAD_ENCODING,
  77   CHUNKE_LAST
  78 } CHUNKcode;
  79
  80 struct Curl_chunker {
  81   char hexbuffer[ MAXNUM_SIZE + 1];
  82   int hexindex;
  83   ChunkyState state;
  84   size_t datasize;
  85   size_t dataleft; /* untouched data amount at the end of the last buffer */
  86 };
  87
  88 #endif