mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-29 01:33:16 +03:00
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
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* Copyright 2006 Richard Wilson <info@tinct.net>
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* Copyright 2005 James Bursa <bursa@users.sourceforge.net>
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* Copyright 2005 John M Bell <jmb202@ecs.soton.ac.uk>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* \brief Implementation of URL parsing and joining operations.
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*/
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#include <ctype.h>
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#include <string.h>
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#include <stdlib.h>
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#include <curl/curl.h>
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#include "utils/config.h"
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#include "utils/log.h"
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#include "utils/url.h"
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/* exported interface documented in utils/url.h */
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nserror url_unescape(const char *str, int length, char **result)
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{
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char *curlstr;
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char *retstr;
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curlstr = curl_unescape(str, length);
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if (curlstr == NULL) {
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return NSERROR_NOMEM;
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}
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retstr = strdup(curlstr);
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curl_free(curlstr);
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if (retstr == NULL) {
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return NSERROR_NOMEM;
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}
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*result = retstr;
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return NSERROR_OK;
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}
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/* exported interface documented in utils/url.h */
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nserror url_escape(const char *unescaped, size_t toskip,
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bool sptoplus, const char *escexceptions, char **result)
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{
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size_t len;
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char *escaped, *d, *tmpres;
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const char *c;
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if (!unescaped || !result)
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return NSERROR_NOT_FOUND;
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*result = NULL;
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len = strlen(unescaped);
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if (len < toskip)
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return NSERROR_NOT_FOUND;
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len -= toskip;
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escaped = malloc(len * 3 + 1);
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if (!escaped)
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return NSERROR_NOMEM;
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for (c = unescaped + toskip, d = escaped; *c; c++) {
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/* Check if we should escape this byte.
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* '~' is unreserved and should not be percent encoded, if
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* you believe the spec; however, leaving it unescaped
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* breaks a bunch of websites, so we escape it anyway. */
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if (!isascii(*c)
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|| (strchr(":/?#[]@" /* gen-delims */
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"!$&'()*+,;=" /* sub-delims */
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"<>%\"{}|\\^`~" /* others */, *c)
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&& (!escexceptions || !strchr(escexceptions, *c)))
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|| *c <= 0x20 || *c == 0x7f) {
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if (*c == 0x20 && sptoplus) {
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*d++ = '+';
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} else {
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*d++ = '%';
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*d++ = "0123456789ABCDEF"[((*c >> 4) & 0xf)];
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*d++ = "0123456789ABCDEF"[(*c & 0xf)];
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}
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} else {
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/* unreserved characters: [a-zA-Z0-9-._] */
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*d++ = *c;
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}
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}
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*d++ = '\0';
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tmpres = malloc(d - escaped + toskip);
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if (!tmpres) {
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free(escaped);
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return NSERROR_NOMEM;
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}
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memcpy(tmpres, unescaped, toskip);
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memcpy(tmpres + toskip, escaped, d - escaped);
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*result = tmpres;
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free(escaped);
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return NSERROR_OK;
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}
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