NAME

       CURLOPT_RANGE - 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.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, "https://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),

libcurl 7.81.0                                  November 26, 2021                               CURLOPT_RANGE(3)