/****************************************************************************
* apps/include/netutils/base64.h
*
* This file is part of the NuttX RTOS:
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Darcy Gong
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <apps/netutils/urldecode.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE
# define IS_HEX_CHAR(ch) \
((ch >= '0' && ch <= '9') || \
(ch >= 'a' && ch <= 'f') || \
(ch >= 'A' && ch <= 'F'))
# define HEX_VALUE(ch, value) \
if (ch >= '0' && ch <= '9') \
{ \
value = ch - '0'; \
} \
else if (ch >= 'a' && ch <= 'f') \
{ \
value = ch - 'a' + 10; \
} \
else \
{ \
value = ch - 'A' + 10; \
}
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: from_hex
*
* Description:
* Converts a hex character to its integer value,
*
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE_NEWMEMORY
static char from_hex(char ch)
{
return isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10;
}
#endif
/****************************************************************************
* Name:
*
* Description:
* Converts an integer value to its hex character,
*
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE_NEWMEMORY
static char to_hex(char code)
{
static const char hex[] = "0123456789abcdef";
return hex[code & 15];
}
#endif
/****************************************************************************
* Name: int2h
*
* Description:
* Convert a single character to a 2 digit hex str a terminating '\0' is
* added
*
****************************************************************************/
#ifdef CONFIG_CODECS_AVR_URLCODE
static void int2h(char c, char *hstr)
{
hstr[1] = (c & 0xf) + '0';
if ((c & 0xf) > 9)
{
hstr[1] = (c & 0xf) - 10 + 'a';
}
c = (c >> 4) & 0xf;
hstr[0] = c + '0';
if (c > 9)
{
hstr[0] = c - 10 + 'a';
}
hstr[2] = '\0';
}
#endif
/****************************************************************************
* Name: h2int
*
* Description:
* Convert a single hex digit character to its integer value.
*
****************************************************************************/
#ifdef CONFIG_CODECS_AVR_URLCODE
static unsigned char h2int(char c)
{
if (c >= '0' && c <= '9')
{
return ((unsigned char)c - '0');
}
if (c >= 'a' && c <= 'f')
{
return ((unsigned char)c - 'a' + 10);
}
if (c >= 'A' && c <= 'F')
{
return ((unsigned char)c - 'A' + 10);
}
return 0;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name:
*
* Description:
* Returns a url-encoded version of str.
*
* IMPORTANT: be sure to free() the returned string after use.
*
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE_NEWMEMORY
char *url_encode(char *str)
{
char *pstr = str;
char *buf = malloc(strlen(str) * 3 + 1);
char *pbuf = buf;
while (*pstr)
{
if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~')
{
*pbuf++ = *pstr;
}
else if (*pstr == ' ')
{
*pbuf++ = '+';
}
else
{
*pbuf++ = '%';
*pbuf++ = to_hex(*pstr >> 4);
*pbuf++ = to_hex(*pstr & 15);
}
pstr++;
}
*pbuf = '\0';
return buf;
}
#endif
/****************************************************************************
* Name: url_decode
*
* Description:
* Returns a url-decoded version of str.
*
* IMPORTANT: be sure to free() the returned string after use.
*
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE_NEWMEMORY
char *url_decode(char *str)
{
char *pstr = str;
char *buf = malloc(strlen(str) + 1);
char *pbuf = buf;
while (*pstr)
{
if (*pstr == '%')
{
if (pstr[1] && pstr[2])
{
*pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
pstr += 2;
}
}
else if (*pstr == '+')
{
*pbuf++ = ' ';
}
else
{
*pbuf++ = *pstr;
}
pstr++;
}
*pbuf = '\0';
return buf;
}
#endif
/****************************************************************************
* Name: urlencode
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE
char *urlencode(const char *src, const int src_len, char *dest, int *dest_len)
{
static const unsigned char hex_chars[] = "0123456789ABCDEF";
const unsigned char *pSrc;
const unsigned char *pEnd;
char *pDest;
pDest = dest;
pEnd = (unsigned char *)src + src_len;
for (pSrc = (unsigned char *)src; pSrc < pEnd; pSrc++)
{
if ((*pSrc >= '0' && *pSrc <= '9') ||
(*pSrc >= 'a' && *pSrc <= 'z') ||
(*pSrc >= 'A' && *pSrc <= 'Z') ||
(*pSrc == '_' || *pSrc == '-' || *pSrc == '.' || *pSrc == '~'))
{
*pDest++ = *pSrc;
}
else if (*pSrc == ' ')
{
*pDest++ = '+';
}
else
{
*pDest++ = '%';
*pDest++ = hex_chars[(*pSrc) >> 4];
*pDest++ = hex_chars[(*pSrc) & 0x0F];
}
}
*pDest = '\0';
*dest_len = pDest - dest;
return dest;
}
#endif
/****************************************************************************
* Name: urldecode
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE
char *urldecode(const char *src, const int src_len, char *dest, int *dest_len)
{
const unsigned char *pSrc;
const unsigned char *pEnd;
char *pDest;
unsigned char cHigh;
unsigned char cLow;
int valHigh;
int valLow;
pDest = dest;
pSrc = (unsigned char *)src;
pEnd = (unsigned char *)src + src_len;
while (pSrc < pEnd)
{
if (*pSrc == '%' && pSrc + 2 < pEnd)
{
cHigh = *(pSrc + 1);
cLow = *(pSrc + 2);
if (IS_HEX_CHAR(cHigh) && IS_HEX_CHAR(cLow))
{
HEX_VALUE(cHigh, valHigh)
HEX_VALUE(cLow, valLow)
*pDest++ = (valHigh << 4) | valLow;
pSrc += 3;
}
else
{
*pDest++ = *pSrc;
pSrc++;
}
}
else if (*pSrc == '+')
{
*pDest++ = ' ';
pSrc++;
}
else
{
*pDest++ = *pSrc;
pSrc++;
}
}
*pDest = '\0';
*dest_len = pDest - dest;
return dest;
}
#endif
/****************************************************************************
* Name: urlencode_len
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE
int urlencode_len(const char *src, const int src_len)
{
const unsigned char *pSrc;
const unsigned char *pEnd;
int len = 0;
pEnd = (unsigned char *)src + src_len;
for (pSrc = (unsigned char *)src; pSrc < pEnd; pSrc++)
{
if ((*pSrc >= '0' && *pSrc <= '9') ||
(*pSrc >= 'a' && *pSrc <= 'z') ||
(*pSrc >= 'A' && *pSrc <= 'Z') ||
(*pSrc == '_' || *pSrc == '-' || *pSrc == '.' || *pSrc == '~' || *pSrc == ' '))
{
len++;
}
else
{
len+=3;
}
}
return len;
}
#endif
/****************************************************************************
* Name: urldecode_len
****************************************************************************/
#ifdef CONFIG_CODECS_URLCODE
int urldecode_len(const char *src, const int src_len)
{
const unsigned char *pSrc;
const unsigned char *pEnd;
int len = 0;
unsigned char cHigh;
unsigned char cLow;
pSrc = (unsigned char *)src;
pEnd = (unsigned char *)src + src_len;
while (pSrc < pEnd)
{
if (*pSrc == '%' && pSrc + 2 < pEnd)
{
cHigh = *(pSrc + 1);
cLow = *(pSrc + 2);
if (IS_HEX_CHAR(cHigh) && IS_HEX_CHAR(cLow))
{
pSrc += 2;
}
}
len++;
pSrc++;
}
return len;
}
#endif
/****************************************************************************
* Name: urlrawdecode
*
* Description:
* decode a url string e.g "hello%20joe" or "hello+joe" becomes "hello joe"
*
****************************************************************************/
#ifdef CONFIG_CODECS_AVR_URLCODE
void urlrawdecode(char *urlbuf)
{
char c;
char *dst;
dst = urlbuf;
while ((c = *urlbuf))
{
if (c == '+')
{
c = ' ';
}
if (c == '%')
{
urlbuf++;
c = *urlbuf;
urlbuf++;
c = (h2int(c) << 4) | h2int(*urlbuf);
}
*dst = c;
dst++;
urlbuf++;
}
*dst = '\0';
}
#endif
/****************************************************************************
* Name: urlrawencode
*
* Description:
* There must be enoug space in urlbuf. In the worst case that is 3 times
* the length of str
*
****************************************************************************/
#ifdef CONFIG_CODECS_AVR_URLCODE
void urlrawencode(char *str, char *urlbuf)
{
char c;
while ((c = *str))
{
if (c == ' ' || isalnum(c) || c == '_' || c == '-' || c == '.' || c == '~')
{
if (c == ' ')
{
c = '+';
}
*urlbuf = c;
str++;
urlbuf++;
continue;
}
*urlbuf = '%';
urlbuf++;
int2h(c, urlbuf);
urlbuf++;
urlbuf++;
str++;
}
*urlbuf = '\0';
}
#endif
