73 lines
3.3 KiB
C
73 lines
3.3 KiB
C
/*-
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* Copyright 2012 Matthew Endsley
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* All rights reserved
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted providing that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "header.h"
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static unsigned char http_header_state[] = {
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/* * \t \n \r ' ' , : PAD */
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0x80, 1, 0xC1, 0xC1, 1, 0x80, 0x80, 0xC1, /* state 0: HTTP version */
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0x81, 2, 0xC1, 0xC1, 2, 1, 1, 0xC1, /* state 1: Response code */
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0x82, 0x82, 4, 3, 0x82, 0x82, 0x82, 0xC1, /* state 2: Response reason */
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0xC1, 0xC1, 4, 0xC1, 0xC1, 0xC1, 0xC1, 0xC1, /* state 3: HTTP version newline */
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0x84, 0xC1, 0xC0, 5, 0xC1, 0xC1, 6, 0xC1, /* state 4: Start of header field */
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0xC1, 0xC1, 0xC0, 0xC1, 0xC1, 0xC1, 0xC1, 0xC1, /* state 5: Last CR before end of header */
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0x87, 6, 0xC1, 0xC1, 6, 0x87, 0x87, 0xC1, /* state 6: leading whitespace before header value */
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0x87, 0x87, 0xC4, 10, 0x87, 0x88, 0x87, 0xC1, /* state 7: header field value */
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0x87, 0x88, 6, 9, 0x88, 0x88, 0x87, 0xC1, /* state 8: Split value field value */
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0xC1, 0xC1, 6, 0xC1, 0xC1, 0xC1, 0xC1, 0xC1, /* state 9: CR after split value field */
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0xC1, 0xC1, 0xC4, 0xC1, 0xC1, 0xC1, 0xC1, 0xC1, /* state 10:CR after header value */
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};
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int http_parse_header_char(int* state, char ch)
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{
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int newstate, code = 0;
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switch (ch) {
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case '\t': code = 1; break;
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case '\n': code = 2; break;
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case '\r': code = 3; break;
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case ' ': code = 4; break;
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case ',': code = 5; break;
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case ':': code = 6; break;
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}
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newstate = http_header_state[*state * 8 + code];
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*state = (newstate & 0xF);
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switch (newstate) {
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case 0xC0: return http_header_status_done;
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case 0xC1: return http_header_status_done;
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case 0xC4: return http_header_status_store_keyvalue;
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case 0x80: return http_header_status_version_character;
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case 0x81: return http_header_status_code_character;
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case 0x82: return http_header_status_status_character;
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case 0x84: return http_header_status_key_character;
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case 0x87: return http_header_status_value_character;
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case 0x88: return http_header_status_value_character;
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}
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return http_header_status_continue;
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}
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