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/*
* Soft: Perform a GET query to a remote HTTP/HTTPS server.
* Set a timer to compute global remote server response
* time.
*
* Part: HTML stream parser utility functions.
*
* Version: $Id: html.c,v 1.1.15 2007/09/15 04:07:41 acassen Exp $
*
* Authors: Alexandre Cassen, <acassen@linux-vs.org>
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Copyright (C) 2001-2007 Alexandre Cassen, <acassen@freebox.fr>
*/
#include <string.h>
#include <stdlib.h>
#include "html.h"
#include "memory.h"
/* Return the http header content length */
int extract_content_length(char *buffer, int size)
{
char *clen = strstr(buffer, CONTENT_LENGTH);
char *content_buffer = NULL;
char *buf_len;
int inc = 0;
int i;
/* Allocate the room */
buf_len = (char *)MALLOC(40);
/* Pattern not found */
if (!clen)
return 0;
/* Content-Length extraction */
while (*(clen++) != ':');
content_buffer = clen;
while (*(clen++) != '\r' && *clen != '\n')
inc++;
for (i = 0; i < inc; i++)
strncat(buf_len, content_buffer+i, 1);
i = atoi(buf_len);
FREE(buf_len);
return i;
}
/*
* Return the http header error code. According
* to rfc2616.6.1 status code is between HTTP_Version
* and Reason_Phrase, separated by space caracter.
*/
int extract_status_code(char *buffer, int size)
{
char *buf_code;
char *begin;
char *end = buffer + size;
int inc = 0;
/* Allocate the room */
buf_code = (char *)MALLOC(10);
/* Status-Code extraction */
while (buffer < end && *buffer++ != ' ') ;
begin = buffer;
while (buffer < end && *buffer++ != ' ')
inc++;
strncat(buf_code, begin, inc);
inc = atoi(buf_code);
FREE(buf_code);
return inc;
}
/* simple function returning a pointer to the html buffer begin */
char *extract_html(char *buffer, int size_buffer)
{
char *end = buffer + size_buffer;
char *cur;
for (cur = buffer; cur + 3 < end; cur++)
if (*cur == '\r' && *(cur+1) == '\n'
&& *(cur+2) == '\r' && *(cur+3) == '\n')
return cur + 4;
return NULL;
}
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