NAME

       curl_easy_unescape - URL decodes the given string

SYNOPSIS

       #include <curl/curl.h>

       char *curl_easy_unescape(CURL *curl, const char *input,
                                int inlength, int *outlength);

DESCRIPTION

       This  function  converts the URL encoded string input to a "plain string" and returns that
       in an allocated memory area. All input characters that are URL encoded (%XX where XX is  a
       two-digit hexadecimal number) are converted to their binary versions.

       If the length argument is set to 0 (zero), curl_easy_unescape(3) uses strlen() on input to
       find out the size.

       If outlength is non-NULL, the function writes the length of the  returned  string  in  the
       integer  it  points to. This allows proper handling even for strings containing %00. Since
       this is a pointer to an int type, it can only return a value up to INT_MAX  so  no  longer
       string can be returned in this parameter.

       Since  7.82.0, the curl parameter is ignored. Prior to that there was per-handle character
       conversion support for some old operating systems  such  as  TPF,  but  it  was  otherwise
       ignored.

       You must curl_free(3) the returned string when you are done with it.

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           int decodelen;
           char *decoded = curl_easy_unescape(curl, "%63%75%72%6c", 12, &decodelen);
           if(decoded) {
             /* do not assume printf() works on the decoded data! */
             printf("Decoded: ");
             /* ... */
             curl_free(decoded);
           }
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in 7.15.4 and replaces the old curl_unescape(3) function.

RETURN VALUE

       A pointer to a null-terminated string or NULL if it failed.

SEE ALSO

       curl_easy_escape(3), curl_free(3)