2002-09-03 13:52:59 +02:00
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/***************************************************************************
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2004-06-24 16:35:45 +02:00
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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1999-12-29 15:20:26 +01:00
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* \___|\___/|_| \_\_____|
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*
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2011-04-20 00:48:20 +02:00
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* Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
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1999-12-29 15:20:26 +01:00
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*
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2002-09-03 13:52:59 +02:00
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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2004-06-24 16:35:45 +02:00
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*
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2001-01-03 10:29:33 +01:00
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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2002-09-03 13:52:59 +02:00
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* furnished to do so, under the terms of the COPYING file.
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1999-12-29 15:20:26 +01:00
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*
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2001-01-03 10:29:33 +01:00
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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1999-12-29 15:20:26 +01:00
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*
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2002-09-03 13:52:59 +02:00
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***************************************************************************/
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1999-12-29 15:20:26 +01:00
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/* Escape and unescape URL encoding in strings. The functions return a new
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* allocated string or NULL if an error occurred. */
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2000-08-31 14:03:04 +02:00
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#include "setup.h"
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2011-07-26 17:23:27 +02:00
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2000-08-31 14:03:04 +02:00
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#include <curl/curl.h>
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2009-04-21 13:46:16 +02:00
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#include "curl_memory.h"
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2006-04-07 23:50:47 +02:00
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#include "urldata.h"
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2010-02-24 01:03:06 +01:00
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#include "warnless.h"
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2011-04-20 00:48:20 +02:00
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#include "non-ascii.h"
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1999-12-29 15:20:26 +01:00
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2004-06-24 16:35:45 +02:00
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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2000-10-09 13:12:34 +02:00
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/* The last #include file should be: */
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#include "memdebug.h"
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2008-09-09 23:15:50 +02:00
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/* Portable character check (remember EBCDIC). Do not use isalnum() because
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2010-09-28 23:46:14 +02:00
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its behavior is altered by the current locale.
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See http://tools.ietf.org/html/rfc3986#section-2.3
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*/
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static bool Curl_isunreserved(unsigned char in)
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2008-09-09 23:15:50 +02:00
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{
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switch (in) {
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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case 'a': case 'b': case 'c': case 'd': case 'e':
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case 'f': case 'g': case 'h': case 'i': case 'j':
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case 'k': case 'l': case 'm': case 'n': case 'o':
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case 'p': case 'q': case 'r': case 's': case 't':
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case 'u': case 'v': case 'w': case 'x': case 'y': case 'z':
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case 'A': case 'B': case 'C': case 'D': case 'E':
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case 'F': case 'G': case 'H': case 'I': case 'J':
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case 'K': case 'L': case 'M': case 'N': case 'O':
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case 'P': case 'Q': case 'R': case 'S': case 'T':
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case 'U': case 'V': case 'W': case 'X': case 'Y': case 'Z':
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2010-09-28 23:46:14 +02:00
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case '-': case '.': case '_': case '~':
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2008-09-09 23:15:50 +02:00
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return TRUE;
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default:
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break;
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}
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return FALSE;
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}
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2006-04-07 23:50:47 +02:00
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/* for ABI-compatibility with previous versions */
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2004-07-01 10:10:21 +02:00
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char *curl_escape(const char *string, int inlength)
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2006-04-07 23:50:47 +02:00
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{
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return curl_easy_escape(NULL, string, inlength);
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}
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/* for ABI-compatibility with previous versions */
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char *curl_unescape(const char *string, int length)
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{
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return curl_easy_unescape(NULL, string, length, NULL);
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}
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char *curl_easy_escape(CURL *handle, const char *string, int inlength)
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1999-12-29 15:20:26 +01:00
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{
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2004-07-01 10:10:21 +02:00
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size_t alloc = (inlength?(size_t)inlength:strlen(string))+1;
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2004-05-12 15:04:30 +02:00
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char *ns;
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2003-01-08 03:27:47 +01:00
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char *testing_ptr = NULL;
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2007-10-01 00:40:24 +02:00
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unsigned char in; /* we need to treat the characters unsigned */
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2004-03-08 09:38:29 +01:00
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size_t newlen = alloc;
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2004-01-29 14:56:45 +01:00
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int strindex=0;
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2004-07-01 10:10:21 +02:00
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size_t length;
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2011-05-23 16:55:09 +02:00
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CURLcode res;
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1999-12-29 15:20:26 +01:00
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2004-05-12 15:04:30 +02:00
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ns = malloc(alloc);
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if(!ns)
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return NULL;
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2001-04-07 20:35:28 +02:00
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length = alloc-1;
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2001-03-22 12:40:58 +01:00
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while(length--) {
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in = *string;
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2007-08-04 22:47:59 +02:00
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2011-04-20 15:17:42 +02:00
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if(Curl_isunreserved(in))
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2007-08-04 22:47:59 +02:00
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/* just copy this */
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ns[strindex++]=in;
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2010-01-23 00:21:39 +01:00
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else {
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2001-03-22 12:40:58 +01:00
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/* encode it */
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2001-08-05 14:34:07 +02:00
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newlen += 2; /* the size grows with two, since this'll become a %XX */
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if(newlen > alloc) {
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alloc *= 2;
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2003-01-08 03:27:47 +01:00
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testing_ptr = realloc(ns, alloc);
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if(!testing_ptr) {
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free( ns );
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2001-08-05 14:34:07 +02:00
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return NULL;
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2003-01-08 03:27:47 +01:00
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}
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else {
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ns = testing_ptr;
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}
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2001-03-22 19:06:08 +01:00
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}
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2006-04-07 23:50:47 +02:00
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2011-05-23 16:55:09 +02:00
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res = Curl_convert_to_network(handle, &in, 1);
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if(res) {
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2006-04-07 23:50:47 +02:00
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/* Curl_convert_to_network calls failf if unsuccessful */
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free(ns);
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return NULL;
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}
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2004-06-24 13:54:11 +02:00
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snprintf(&ns[strindex], 4, "%%%02X", in);
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2001-03-22 19:06:08 +01:00
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2004-01-29 14:56:45 +01:00
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strindex+=3;
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2001-03-22 12:40:58 +01:00
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}
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string++;
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}
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2004-01-29 14:56:45 +01:00
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ns[strindex]=0; /* terminate it */
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2001-03-22 12:40:58 +01:00
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return ns;
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1999-12-29 15:20:26 +01:00
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}
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2008-10-08 03:17:51 +02:00
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/*
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* Unescapes the given URL escaped string of given length. Returns a
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* pointer to a malloced string with length given in *olen.
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* If length == 0, the length is assumed to be strlen(string).
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* If olen == NULL, no output length is stored.
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*/
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2006-04-07 23:50:47 +02:00
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char *curl_easy_unescape(CURL *handle, const char *string, int length,
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int *olen)
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1999-12-29 15:20:26 +01:00
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{
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2001-08-14 10:20:17 +02:00
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int alloc = (length?length:(int)strlen(string))+1;
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2001-03-22 12:40:58 +01:00
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char *ns = malloc(alloc);
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unsigned char in;
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2004-01-29 14:56:45 +01:00
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int strindex=0;
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2010-02-24 01:03:06 +01:00
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unsigned long hex;
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2011-05-23 16:55:09 +02:00
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CURLcode res;
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2004-06-24 16:35:45 +02:00
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2011-04-20 00:48:20 +02:00
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if(!ns)
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2003-01-08 03:27:47 +01:00
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return NULL;
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2004-06-24 16:35:45 +02:00
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2001-03-22 12:40:58 +01:00
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while(--alloc > 0) {
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in = *string;
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2006-10-17 23:32:56 +02:00
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if(('%' == in) && ISXDIGIT(string[1]) && ISXDIGIT(string[2])) {
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2003-05-21 17:53:59 +02:00
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/* this is two hexadecimal digits following a '%' */
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char hexstr[3];
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char *ptr;
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hexstr[0] = string[1];
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hexstr[1] = string[2];
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hexstr[2] = 0;
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2010-02-24 01:03:06 +01:00
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hex = strtoul(hexstr, &ptr, 16);
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2003-05-21 17:53:59 +02:00
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2010-02-24 01:03:06 +01:00
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in = curlx_ultouc(hex); /* this long is never bigger than 255 anyway */
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2006-04-07 23:50:47 +02:00
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2011-05-23 16:55:09 +02:00
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res = Curl_convert_from_network(handle, &in, 1);
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if(res) {
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2006-04-07 23:50:47 +02:00
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/* Curl_convert_from_network calls failf if unsuccessful */
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free(ns);
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return NULL;
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}
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2003-05-21 17:53:59 +02:00
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string+=2;
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alloc-=2;
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2001-03-22 12:40:58 +01:00
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}
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2004-06-24 16:35:45 +02:00
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2004-01-29 14:56:45 +01:00
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ns[strindex++] = in;
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2001-03-22 12:40:58 +01:00
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string++;
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}
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2004-01-29 14:56:45 +01:00
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ns[strindex]=0; /* terminate it */
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2006-04-07 23:50:47 +02:00
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if(olen)
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/* store output size */
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*olen = strindex;
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2001-03-22 12:40:58 +01:00
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return ns;
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1999-12-29 15:20:26 +01:00
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}
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2001-09-07 06:01:32 +02:00
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2003-05-21 17:53:59 +02:00
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/* For operating systems/environments that use different malloc/free
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2008-09-09 23:15:50 +02:00
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systems for the app and for this library, we provide a free that uses
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2003-05-21 17:53:59 +02:00
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the library's memory system */
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2002-09-25 14:26:07 +02:00
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void curl_free(void *p)
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{
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2004-05-13 17:16:36 +02:00
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if(p)
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free(p);
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2002-09-25 14:26:07 +02:00
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}
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