+++ /dev/null
-const char encode_rcs[] = "$Id: encode.c,v 2.0 2002/06/04 14:34:21 jongfoster Exp $";
-/*********************************************************************
- *
- * File : $Source: /cvsroot/ijbswa/current/src/encode.c,v $
- *
- * Purpose : Functions to encode and decode URLs, and also to
- * encode cookies and HTML text.
- *
- * Copyright : Written by and Copyright (C) 2001 the SourceForge
- * Privoxy team. http://www.privoxy.org/
- *
- * Based on the Internet Junkbuster originally written
- * by and Copyright (C) 1997 Anonymous Coders and
- * Junkbusters Corporation. http://www.junkbusters.com
- *
- * 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.
- *
- * 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.
- *
- * The GNU General Public License should be included with
- * this file. If not, you can view it at
- * http://www.gnu.org/copyleft/gpl.html
- * or write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Revisions :
- * $Log: encode.c,v $
- * Revision 2.0 2002/06/04 14:34:21 jongfoster
- * Moving source files to src/
- *
- * Revision 1.8 2002/03/26 22:29:54 swa
- * we have a new homepage!
- *
- * Revision 1.7 2002/03/24 13:25:43 swa
- * name change related issues
- *
- * Revision 1.6 2002/03/13 00:27:04 jongfoster
- * Killing warnings
- *
- * Revision 1.5 2002/03/07 03:46:53 oes
- * Fixed compiler warnings etc
- *
- * Revision 1.4 2002/01/22 23:28:07 jongfoster
- * Adding convenience function html_encode_and_free_original()
- * Making all functions accept NULL paramaters - in this case, they
- * simply return NULL. This allows error-checking to be deferred.
- *
- * Revision 1.3 2001/11/13 00:16:40 jongfoster
- * Replacing references to malloc.h with the standard stdlib.h
- * (See ANSI or K&R 2nd Ed)
- *
- * Revision 1.2 2001/05/17 22:52:35 oes
- * - Cleaned CRLF's from the sources and related files
- *
- * Revision 1.1.1.1 2001/05/15 13:58:51 oes
- * Initial import of version 2.9.3 source tree
- *
- *
- *********************************************************************/
-\f
-
-#include "config.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "encode.h"
-
-const char encode_h_rcs[] = ENCODE_H_VERSION;
-
-/**
- * Maps special characters in a URL to their equivalent % codes.
- */
-static const char * const url_code_map[256] = {
- NULL, "%01", "%02", "%03", "%04", "%05", "%06", "%07", "%08", "%09",
- "%0A", "%0B", "%0C", "%0D", "%0E", "%0F", "%10", "%11", "%12", "%13",
- "%14", "%15", "%16", "%17", "%18", "%19", "%1A", "%1B", "%1C", "%1D",
- "%1E", "%1F", "+", "%21", "%22", "%23", "%24", "%25", "%26", "%27",
- "%28", "%29", NULL, "%2B", "%2C", NULL, NULL, "%2F", NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "%3A", "%3B",
- "%3C", "%3D", "%3E", "%3F", NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, "%5B", "%5C", "%5D", "%5E", NULL, "%60", NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, "%7B", "%7C", "%7D", "%7E", "%7F", "%80", "%81",
- "%82", "%83", "%84", "%85", "%86", "%87", "%88", "%89", "%8A", "%8B",
- "%8C", "%8D", "%8E", "%8F", "%90", "%91", "%92", "%93", "%94", "%95",
- "%96", "%97", "%98", "%99", "%9A", "%9B", "%9C", "%9D", "%9E", "%9F",
- "%A0", "%A1", "%A2", "%A3", "%A4", "%A5", "%A6", "%A7", "%A8", "%A9",
- "%AA", "%AB", "%AC", "%AD", "%AE", "%AF", "%B0", "%B1", "%B2", "%B3",
- "%B4", "%B5", "%B6", "%B7", "%B8", "%B9", "%BA", "%BB", "%BC", "%BD",
- "%BE", "%BF", "%C0", "%C1", "%C2", "%C3", "%C4", "%C5", "%C6", "%C7",
- "%C8", "%C9", "%CA", "%CB", "%CC", "%CD", "%CE", "%CF", "%D0", "%D1",
- "%D2", "%D3", "%D4", "%D5", "%D6", "%D7", "%D8", "%D9", "%DA", "%DB",
- "%DC", "%DD", "%DE", "%DF", "%E0", "%E1", "%E2", "%E3", "%E4", "%E5",
- "%E6", "%E7", "%E8", "%E9", "%EA", "%EB", "%EC", "%ED", "%EE", "%EF",
- "%F0", "%F1", "%F2", "%F3", "%F4", "%F5", "%F6", "%F7", "%F8", "%F9",
- "%FA", "%FB", "%FC", "%FD", "%FE", "%FF"
-};
-
-/**
- * Maps special characters in HTML to their equivalent entities.
- */
-static const char * const html_code_map[256] = {
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL,""",NULL,NULL,NULL,"&",NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- "<",NULL,">",NULL,NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL
-};
-
-/**
- * Maps special characters in a cookie to their equivalent % codes.
- */
-static const char * const cookie_code_map[256] = {
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, "+", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, "%2C",NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "%3B",
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL, NULL, NULL
-};
-
-
-/*********************************************************************
- *
- * Function : html_encode
- *
- * Description : Encodes a string so it's not interpreted as
- * containing HTML tags or entities.
- * Replaces <, >, &, and " with the appropriate HTML
- * entities.
- *
- * Parameters :
- * 1 : s = String to encode. Null-terminated.
- *
- * Returns : Encoded string, newly allocated on the heap.
- * Caller is responsible for freeing it with free().
- * If s is NULL, or on out-of memory, returns NULL.
- *
- *********************************************************************/
-char * html_encode(const char *s)
-{
- char * buf;
-
- if (s == NULL)
- {
- return NULL;
- }
-
- /* each input char can expand to at most 6 chars */
- buf = (char *) malloc((strlen(s) * 6) + 1);
-
- if (buf)
- {
- char c;
- char * p = buf;
- while ( (c = *s++) != '\0')
- {
- const char * replace_with = html_code_map[(unsigned char) c];
- if(replace_with != NULL)
- {
- strcpy(p, replace_with);
- p += strlen(replace_with);
- }
- else
- {
- *p++ = c;
- }
- }
-
- *p = '\0';
- }
-
- return(buf);
-}
-
-
-/*********************************************************************
- *
- * Function : html_encode_and_free_original
- *
- * Description : Encodes a string so it's not interpreted as
- * containing HTML tags or entities.
- * Replaces <, >, &, and " with the appropriate HTML
- * entities. Free()s original string.
- * If original string is NULL, simply returns NULL.
- *
- * Parameters :
- * 1 : s = String to encode. Null-terminated.
- *
- * Returns : Encoded string, newly allocated on the heap.
- * Caller is responsible for freeing it with free().
- * If s is NULL, or on out-of memory, returns NULL.
- *
- *********************************************************************/
-char * html_encode_and_free_original(char *s)
-{
- char * result;
-
- if (s == NULL)
- {
- return NULL;
- }
-
- result = html_encode(s);
- free(s);
-
- return result;
-}
-
-
-/*********************************************************************
- *
- * Function : cookie_encode
- *
- * Description : Encodes a string so it can be used in a cookie.
- * Replaces " ", ",", and ";" with the appropriate
- * codes.
- *
- * Parameters :
- * 1 : s = String to encode. Null-terminated.
- *
- * Returns : Encoded string, newly allocated on the heap.
- * Caller is responsible for freeing it with free().
- * If s is NULL, or on out-of memory, returns NULL.
- *
- *********************************************************************/
-char * cookie_encode(const char *s)
-{
- char * buf;
-
- if (s == NULL)
- {
- return NULL;
- }
-
- /* each input char can expand to at most 3 chars */
- buf = (char *) malloc((strlen(s) * 3) + 1);
-
- if (buf)
- {
- char c;
- char * p = buf;
- while ( (c = *s++) != '\0')
- {
- const char * replace_with = cookie_code_map[(unsigned char) c];
- if (replace_with != NULL)
- {
- strcpy(p, replace_with);
- p += strlen(replace_with);
- }
- else
- {
- *p++ = c;
- }
- }
-
- *p = '\0';
- }
-
- return(buf);
-}
-
-/*********************************************************************
- *
- * Function : url_encode
- *
- * Description : Encodes a string so it can be used in a URL
- * query string. Replaces special characters with
- * the appropriate %xx codes.
- *
- * Parameters :
- * 1 : s = String to encode. Null-terminated.
- *
- * Returns : Encoded string, newly allocated on the heap.
- * Caller is responsible for freeing it with free().
- * If s is NULL, or on out-of memory, returns NULL.
- *
- *********************************************************************/
-char * url_encode(const char *s)
-{
- char * buf;
-
- if (s == NULL)
- {
- return NULL;
- }
-
- /* each input char can expand to at most 3 chars */
- buf = (char *) malloc((strlen(s) * 3) + 1);
-
- if (buf)
- {
- char c;
- char * p = buf;
- while( (c = *s++) != '\0')
- {
- const char * replace_with = url_code_map[(unsigned char) c];
- if (replace_with != NULL)
- {
- strcpy(p, replace_with);
- p += strlen(replace_with);
- }
- else
- {
- *p++ = c;
- }
- }
-
- *p = '\0';
-
- }
-
- return(buf);
-}
-
-
-/*********************************************************************
- *
- * Function : xdtoi
- *
- * Description : Converts a single hex digit to an integer.
- *
- * Parameters :
- * 1 : d = in the range of ['0'..'9', 'A'..'F', 'a'..'f']
- *
- * Returns : The integer value, or -1 for non-hex characters.
- *
- *********************************************************************/
-static int xdtoi(const int d)
-{
- if ((d >= '0') && (d <= '9'))
- {
- return(d - '0');
- }
- else if ((d >= 'a') && (d <= 'f'))
- {
- return(d - 'a' + 10);
- }
- else if ((d >= 'A') && (d <= 'F'))
- {
- return(d - 'A' + 10);
- }
- else
- {
- return(-1);
- }
-}
-
-
-/*********************************************************************
- *
- * Function : xtoi
- *
- * Description : Hex string to integer conversion.
- *
- * Parameters :
- * 1 : s = a 2 digit hex string (e.g. "1f"). Only the
- * first two characters will be looked at.
- *
- * Returns : The integer value, or 0 for non-hex strings.
- *
- *********************************************************************/
-static int xtoi(const char *s)
-{
- int d1, d2;
-
- d1 = xdtoi(*s);
- if(d1 >= 0)
- {
- d2 = xdtoi(*(s+1));
- if(d2 >= 0)
- {
- return (d1 << 4) + d2;
- }
- }
-
- return 0;
-}
-
-
-/*********************************************************************
- *
- * Function : url_decode
- *
- * Description : Decodes a URL query string, replacing %xx codes
- * with their decoded form.
- *
- * Parameters :
- * 1 : s = String to decode. Null-terminated.
- *
- * Returns : Decoded string, newly allocated on the heap.
- * Caller is responsible for freeing it with free().
- *
- *********************************************************************/
-char *url_decode(const char * s)
-{
- char *buf = malloc(strlen(s) + 1);
- char *q = buf;
-
- if (buf)
- {
- while (*s)
- {
- switch (*s)
- {
- case '+':
- s++;
- *q++ = ' ';
- break;
-
- case '%':
- if ((*q = xtoi(s + 1)) != '\0')
- {
- s += 3;
- q++;
- }
- else
- {
- /* malformed, just use it */
- *q++ = *s++;
- }
- break;
-
- default:
- *q++ = *s++;
- break;
- }
- }
- *q = '\0';
- }
-
- return(buf);
-
-}
-
-
-/*
- Local Variables:
- tab-width: 3
- end:
-*/
projects / privoxy.git / blobdiff