diff options
Diffstat (limited to 'apps/netutils/codecs/urldecode.c')
-rw-r--r-- | apps/netutils/codecs/urldecode.c | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/apps/netutils/codecs/urldecode.c b/apps/netutils/codecs/urldecode.c new file mode 100644 index 000000000..9b3b60955 --- /dev/null +++ b/apps/netutils/codecs/urldecode.c @@ -0,0 +1,429 @@ +/**************************************************************************** + * 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: 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 |