134 lines
4 KiB
C
134 lines
4 KiB
C
/*
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* Copyright (c) 2010, Kajtar Zsolt <soci@c64.rulez.org>.
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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 provided 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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* Author: Kajtar Zsolt <soci@c64.rulez.org>
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*
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* $Id: urlconv.c,v 1.1 2010/04/11 19:18:47 oliverschmidt Exp $
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*/
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#include <string.h>
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#include "http-strings.h"
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#define ISO_number 0x23
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#define ISO_percent 0x25
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#define ISO_period 0x2e
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#define ISO_slash 0x2f
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#define ISO_question 0x3f
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/*---------------------------------------------------------------------------*/
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/* URL to filename conversion
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*
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* normalizes path by removing "/./"
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* interprets "/../" and calculates path accordingly
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* resulting path is always absolute
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* replaces "%AB" notation with characters
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* strips "#fragment" and "?query" from end
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* replaces multiple slashes with a single one
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* rejects non-ASCII characters
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*
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* MAXLEN is including trailing zero!
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* input and output is ASCII
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*/
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void
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urlconv_tofilename(char *dest, char *source, unsigned char maxlen)
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{
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static unsigned char len;
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static unsigned char c, hex1;
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static unsigned char *from, *to;
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len = 0;
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from = source; to = dest;
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*to = ISO_slash;
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maxlen -= 2;
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do {
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c = *(from++);
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switch(c) {
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case ISO_number:
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case ISO_question:
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c = 0;
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break;
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case ISO_percent:
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c = 0;
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hex1 = (*(from++) | 0x20) ^ 0x30; // ascii only!
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if(hex1 > 0x50 && hex1 < 0x57)
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hex1 -= 0x47;
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else
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if(hex1 > 9)
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break; // invalid hex
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c = (*(from++) | 0x20) ^ 0x30; // ascii only!
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if(c > 0x50 && c < 0x57)
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c -= 0x47;
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else
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if(c > 9)
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break; // invalid hex
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c |= hex1 << 4;
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}
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if(c < 0x20 || c > 0x7e)
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c = 0; // non ascii?!
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if(len >= maxlen)
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c = 0; // too long?
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if(c == ISO_slash || !c) {
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switch(*to) {
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case ISO_slash:
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continue; // no repeated slash
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case ISO_period:
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switch(to[-1]) {
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case ISO_slash: // handle "./"
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--to; --len;
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continue;
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case ISO_period:
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if(to[-2] == ISO_slash) {
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to -= 2; len -= 2;
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if(len) {
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do {
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--to; --len;
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} while(*to != ISO_slash);
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}
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continue;
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}
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}
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}
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}
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if(c) {
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++to; ++len;
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*to = c;
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}
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} while(c);
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if(*to == ISO_slash && (len + sizeof(http_index_html) - 3) < maxlen) {
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strcpy(to, http_index_html); // add index.html
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} else {
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++to;
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*to = 0;
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}
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}
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/*---------------------------------------------------------------------------*/
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