#ifdef HAVE_CONFIG_H #include #endif #include #include #include #include "common.h" #include "log.h" #include "url.h" // ---------------------------------------------------------------------------- // URL encode / decode // code from: http://www.geekhideout.com/urlcode.shtml /* Converts a hex character to its integer value */ char from_hex(char ch) { return (char)(isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10); } /* Converts an integer value to its hex character*/ char to_hex(char code) { static char hex[] = "0123456789abcdef"; return hex[code & 15]; } /* Returns a url-encoded version of str */ /* IMPORTANT: be sure to free() the returned string after use */ char *url_encode(char *str) { char *pstr = str, *buf = malloc(strlen(str) * 3 + 1), *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; } /* Returns a url-decoded version of str */ /* IMPORTANT: be sure to free() the returned string after use */ char *url_decode(char *str) { char *pstr = str, *buf = malloc(strlen(str) + 1), *pbuf = buf; if(!buf) fatal("Cannot allocate memory."); 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; }