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curl_easy_send(3)               libcurl Manual               curl_easy_send(3)

       curl_easy_send - sends raw data over an "easy" connection

       #include <curl/easy.h>

       CURLcode curl_easy_send( CURL *curl, const void *buffer,  size_t buflen, size_t *n);

       This   function  sends  arbitrary  data  over  the  established  connection.  You  may  use  it  together  with
       curl_easy_recv(3) to implement custom protocols using libcurl. This functionality can be particularly useful if
       you use proxies and/or SSL encryption: libcurl will take care of proxy negotiation and connection set-up.

       buffer is a pointer to the data of length buflen that you want sent.  The variable n points to will receive the
       number of sent bytes.

       To establish the connection, set CURLOPT_CONNECT_ONLY option before  calling  curl_easy_perform(3).  Note  that
       curl_easy_send(3) will not work on connections that were created without this option.

       You  must  ensure  that the socket is writable before calling curl_easy_send(3), otherwise the call will return
       CURLE_AGAIN - the socket is used in non-blocking mode internally. Use curl_easy_getinfo(3) with  CURLINFO_LAST-
       SOCKET  to obtain the socket; use your operating system facilities like select(2) to check if it can be written

       Added in 7.18.2.

       On success, returns CURLE_OK and stores the number of bytes actually sent into *n. Note that this may very well
       be less than the amount you wanted to send.

       On failure, returns the appropriate error code.

       See sendrecv.c in docs/examples directory for usage example.

       curl_easy_setopt(3), curl_easy_perform(3), curl_easy_getinfo(3), curl_easy_recv(3)

libcurl 7.18.2                   29 April 2008               curl_easy_send(3)