| /***************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 2000, Daniel Stenberg, <daniel@haxx.se>, et al. |
| * |
| * In order to be useful for every potential user, curl and libcurl are |
| * dual-licensed under the MPL and the MIT/X-derivate licenses. |
| * |
| * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| * copies of the Software, and permit persons to whom the Software is |
| * furnished to do so, under the terms of the MPL or the MIT/X-derivate |
| * licenses. You may pick one of these licenses. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| * $Id$ |
| *****************************************************************************/ |
| |
| /* Escape and unescape URL encoding in strings. The functions return a new |
| * allocated string or NULL if an error occurred. */ |
| |
| #include "setup.h" |
| #include <curl/curl.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| /* The last #include file should be: */ |
| #ifdef MALLOCDEBUG |
| #include "memdebug.h" |
| #endif |
| |
| char *curl_escape(char *string) |
| { |
| int alloc=strlen(string)+1; |
| char *ns = malloc(alloc); |
| unsigned char in; |
| int newlen = alloc; |
| int index=0; |
| |
| while(*string) { |
| in = *string; |
| if(' ' == in) |
| ns[index++] = '+'; |
| else if(!(in >= 'a' && in <= 'z') && |
| !(in >= 'A' && in <= 'Z') && |
| !(in >= '0' && in <= '9')) { |
| /* encode it */ |
| newlen += 2; /* the size grows with two, since this'll become a %XX */ |
| if(newlen > alloc) { |
| alloc *= 2; |
| ns = realloc(ns, alloc); |
| if(!ns) |
| return NULL; |
| } |
| sprintf(&ns[index], "%%%02X", in); |
| index+=3; |
| } |
| else { |
| /* just copy this */ |
| ns[index++]=in; |
| } |
| string++; |
| } |
| ns[index]=0; /* terminate it */ |
| return ns; |
| } |
| |
| char *curl_unescape(char *string, int length) |
| { |
| int alloc = (length?length:strlen(string))+1; |
| char *ns = malloc(alloc); |
| unsigned char in; |
| int index=0; |
| int hex; |
| char querypart=FALSE; /* everything to the right of a '?' letter is |
| the "query part" where '+' should become ' '. |
| RFC 2316, section 3.10 */ |
| |
| while(--alloc > 0) { |
| in = *string; |
| if(querypart && ('+' == in)) |
| in = ' '; |
| else if(!querypart && ('?' == in)) { |
| /* we have "walked in" to the query part */ |
| querypart=TRUE; |
| } |
| else if('%' == in) { |
| /* encoded part */ |
| if(sscanf(string+1, "%02X", &hex)) { |
| in = hex; |
| string+=2; |
| alloc-=2; |
| } |
| } |
| |
| ns[index++] = in; |
| string++; |
| } |
| ns[index]=0; /* terminate it */ |
| return ns; |
| |
| } |