NAME

       CURLOPT_RANGE - set byte range to request

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RANGE, char *range);

DESCRIPTION

       Pass a char * as parameter, which should contain the specified range you want to retrieve.
       It should be in the format "X-Y", where either X or Y may be left out and X and Y are byte
       indexes.

       HTTP  transfers  also  support  several  intervals, separated with commas as in "X-Y,N-M".
       Using this kind of multiple intervals will cause the HTTP  server  to  send  the  response
       document  in  pieces  (using standard MIME separation techniques). Unfortunately, the HTTP
       standard (RFC 7233 section 3.1) allows servers to ignore range requests so even  when  you
       set CURLOPT_RANGE(3) for a request, you may end up getting the full response sent back.

       For  RTSP,  the  formatting of a range should follow RFC2326 Section 12.29. For RTSP, byte
       ranges are not permitted. Instead, ranges should be given in npt, utc, or smpte formats.

       For HTTP PUT uploads this option should not be used, since  it  may  conflict  with  other
       options.  If you need to upload arbitrary parts of a file (like for Amazon's web services)
       support is limited. We suggest set resume position using CURLOPT_RESUME_FROM(3),  set  end
       (resume+size)  position using CURLOPT_INFILESIZE(3) and seek to the resume position before
       initiating   the   transfer   for   each   part.   For   more   information    refer    to
       https://curl.haxx.se/mail/lib-2019-05/0012.html

       Pass a NULL to this option to disable the use of ranges.

       The application does not have to keep the string around after setting this option.

DEFAULT

       NULL

PROTOCOLS

       HTTP, FTP, FILE, RTSP and SFTP.

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

         /* get the first 200 bytes */
         curl_easy_setopt(curl, CURLOPT_RANGE, "0-199");

         /* Perform the request */
         curl_easy_perform(curl);
       }

AVAILABILITY

       FILE since 7.18.0, RTSP since 7.20.0

RETURN VALUE

       Returns CURLE_OK on success or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO

       CURLOPT_RESUME_FROM(3),