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