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CURLOPT_CUSTOMREQUEST(3)

CURLOPT_CUSTOMREQUEST(3)   curl_easy_setopt options   CURLOPT_CUSTOMREQUEST(3)

NAME
       CURLOPT_CUSTOMREQUEST - custom request method

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CUSTOMREQUEST, char *request);

DESCRIPTION
       Pass a pointer to a null-terminated string as parameter.

       When  you change the request method by setting CURLOPT_CUSTOMREQUEST(3)
       to something, you do not actually change how libcurl behaves or acts in
       regards to the particular request method, it will only change  the  ac‐
       tual string sent in the request.

       Restore to the internal default by setting this to NULL.

       This option can be used to specify the request:

       HTTP   Instead of GET or HEAD when performing HTTP based requests. This
              is  particularly  useful,  for  example,  for performing an HTTP
              DELETE request.

              For example:

              When you tell libcurl to do a HEAD request, but then  specify  a
              GET though a custom request libcurl will still act as if it sent
              a  HEAD.  To  switch  to a proper HEAD use CURLOPT_NOBODY(3), to
              switch to a proper POST  use  CURLOPT_POST(3)  or  CURLOPT_POST‐
              FIELDS(3) and to switch to a proper GET use CURLOPT_HTTPGET(3).

              Many  people have wrongly used this option to replace the entire
              request with their own, including multiple headers and POST con‐
              tents. While that might  work  in  many  cases,  it  will  cause
              libcurl  to  send invalid requests and it could possibly confuse
              the remote server badly. Use CURLOPT_POST(3)  and  CURLOPT_POST‐
              FIELDS(3) to set POST data. Use CURLOPT_HTTPHEADER(3) to replace
              or  extend  the  set  of  headers  sent  by  libcurl.  Use  CUR‐
              LOPT_HTTP_VERSION(3) to change HTTP version.


       FTP    Instead of LIST and NLST when performing FTP directory listings.

       IMAP   Instead of LIST when issuing IMAP based requests.

       POP3   Instead of LIST and RETR when issuing POP3 based requests.

              For example:

              When you tell libcurl to use a custom  request  it  will  behave
              like a LIST or RETR command was sent where it expects data to be
              returned by the server. As such CURLOPT_NOBODY(3) should be used
              when specifying commands such as DELE and NOOP for example.

       SMTP   Instead of a HELP or VRFY when issuing SMTP based requests.

              For example:

              Normally a multi line response is returned which can be used, in
              conjunction  with  CURLOPT_MAIL_RCPT(3),  to specify an EXPN re‐
              quest. If the CURLOPT_NOBODY(3) option is specified then the re‐
              quest can be used to issue NOOP and RSET commands.

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

DEFAULT
       NULL

PROTOCOLS
       HTTP, FTP, IMAP, POP3 and SMTP

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");

         /* DELETE the given path */
         curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "DELETE");

         ret = curl_easy_perform(curl);

         curl_easy_cleanup(curl);
       }

AVAILABILITY
       IMAP  is  supported  since  7.30.0,  POP3  since  7.26.0 and SMTP since
       7.34.0.

RETURN VALUE
       Returns CURLE_OK if the option is  supported,  CURLE_UNKNOWN_OPTION  if
       not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO
       CURLOPT_HTTPHEADER(3), CURLOPT_NOBODY(3), CURLOPT_REQUEST_TARGET(3),

libcurl 7.86.0                September 20, 2022      CURLOPT_CUSTOMREQUEST(3)
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