Provided by: libcurl4-doc_7.58.0-2ubuntu3.24_all bug


       CURLOPT_CUSTOMREQUEST - custom string for request


       #include <curl/curl.h>

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


       Pass a pointer to a zero terminated string as parameter.

       When  you  change the request method by setting CURLOPT_CUSTOMREQUEST(3) to something, you
       don't actually change how libcurl behaves or acts in regards  to  the  particular  request
       method, it will only change the actual 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 a 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_POSTFIELDS(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 contents. 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_POSTFIELDS(3) to set  POST
              data.  Use  CURLOPT_HTTPHEADER(3)  to  replace or extend the set of headers sent by
              libcurl. Use CURLOPT_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

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

              For example:

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

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




       HTTP, FTP, IMAP, POP3 and SMTP


       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "");

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

         ret = curl_easy_perform(curl);



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


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