NAME

       curl_easy_unescape - URL decodes the given string

SYNOPSIS

       #include <curl/curl.h>

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

DESCRIPTION

       This  function  converts  the  given  URL encoded input string 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) will  use  strlen()  on  the  input  url
       string to find out the size.

       If  outlength  is  non-NULL,  the function will write the length of the returned string in the integer it
       points to. This allows an escaped string containing %00 to still  get  used  properly  after  unescaping.
       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 unescaped if the string length is returned in this parameter.

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

EXAMPLE

       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),RFC3986

libcurl 7.81.0                                  December 06, 2021                          curl_easy_unescape(3)