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//
// URLTrans.cc
//
// URLTrans: Helper functions for the implementation of the URL class.
//
// Part of the ht://Dig package <https://htdig.sourceforge.net/>
// Copyright (c) 1995-2004 The ht://Dig Group
// For copyright details, see the file COPYING in your distribution
// or the GNU Library General Public License (LGPL) version 2 or later
// <http://www.gnu.org/copyleft/lgpl.html>
//
// $Id: URLTrans.cc,v 1.5 2004/05/28 13:15:12 lha Exp $
//
#ifdef HAVE_CONFIG_H
#include "htconfig.h"
#endif /* HAVE_CONFIG_H */
#include "URL.h"
#include "htString.h"
#include "lib.h"
#include <ctype.h>
//*****************************************************************************
// String &decodeURL(String &str)
// Convert the given URL string to a normal string. This means that
// all escaped characters are converted to their normal values. The
// escape character is '%' and is followed by 2 hex digits
// representing the octet.
//
String &decodeURL(String &str)
{
String temp;
char *p;
for (p = str; p && *p; p++)
{
if (*p == '%')
{
//
// 2 hex digits follow...
//
int value = 0;
for (int i = 0; p[1] && i < 2; i++)
{
p++;
value <<= 4;
if (isdigit(*p))
value += *p - '0';
else
value += toupper(*p) - 'A' + 10;
}
temp << char(value);
}
else
temp << *p;
}
str = temp;
return (str);
}
//*****************************************************************************
// String &encodeURL(String &str, char *valid)
// Convert a normal string to a URL 'safe' string. This means that
// all characters not explicitly mentioned in the URL BNF will be
// escaped. The escape character is '%' and is followed by 2 hex
// digits representing the octet.
//
String &encodeURL(String &str, char *valid)
{
String temp;
static char *digits = "0123456789ABCDEF";
char *p;
for (p = str; p && *p; p++)
{
if (isascii(*p) && (isdigit(*p) || isalpha(*p) || strchr(valid, *p)))
temp << *p;
else
{
temp << '%';
temp << digits[(*p >> 4) & 0x0f];
temp << digits[*p & 0x0f];
}
}
str = temp;
return (str);
}
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