curl_easy_send(3) [mojave man page]

curl_easy_send(3)						  libcurl Manual						 curl_easy_send(3)

NAME

       curl_easy_send - sends raw data over an "easy" connection

SYNOPSIS

       #include <curl/easy.h>

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

DESCRIPTION

       This function sends arbitrary data over the established connection. You may use it together with curl_easy_recv(3) to implement custom pro-
       tocols 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(3) option before calling curl_easy_perform(3) or curl_multi_perform(3). Note that
       curl_easy_send(3) will not work on connections that were created without this option.

       The call will return CURLE_AGAIN if it's not possible to send data right now - the socket is used in  non-blocking  mode  internally.  When
       CURLE_AGAIN  is	returned,  use	your  operating  system  facilities like select(2) to wait until the socket is writable. The socket may be
       obtained using curl_easy_getinfo(3) with CURLINFO_ACTIVESOCKET(3).

       Furthermore if you wait on the socket and it tells you it's writable, curl_easy_send(3) may return CURLE_AGAIN if the only  data  that  was
       sent was for internal SSL processing, and no other data could be sent.

AVAILABILITY

       Added in 7.18.2.

RETURN VALUE

       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.

       This function may return CURLE_AGAIN. In this case, use your operating system facilities to wait until the socket is writable, and retry.

       If there's no socket available to use from the previous transfer, this function returns CURLE_UNSUPPORTED_PROTOCOL.

EXAMPLE

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

SEE ALSO

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

libcurl 7.54.0							 December 18, 2016						 curl_easy_send(3)

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curl_easy_perform(3)						  libcurl Manual					      curl_easy_perform(3)

NAME

       curl_easy_perform - perform a blocking file transfer

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_perform(CURL *easy_handle);

DESCRIPTION

       Invoke  this function after curl_easy_init(3) and all the curl_easy_setopt(3) calls are made, and will perform the transfer as described in
       the options. It must be called with the same easy_handle as input as the curl_easy_init(3) call returned.

       curl_easy_perform(3) performs the entire request in a blocking manner and returns when done, or if it failed.  For  non-blocking  behavior,
       see curl_multi_perform(3).

       You  can do any amount of calls to curl_easy_perform(3) while using the same easy_handle. If you intend to transfer more than one file, you
       are even encouraged to do so. libcurl will then attempt to re-use the same connection for the following transfers, thus making  the  opera-
       tions  faster,  less  CPU  intense  and	using  less network resources. Just note that you will have to use curl_easy_setopt(3) between the
       invokes to set options for the following curl_easy_perform.

       You must never call this function simultaneously from two places using the same easy_handle. Let the function return first before  invoking
       it another time. If you want parallel transfers, you must use several curl easy_handles.

       While the easy_handle is added to a multi handle, it cannot be used by curl_easy_perform(3).

RETURN VALUE

       CURLE_OK  (0)  means  everything  was  ok,  non-zero  means an error occurred as <curl/curl.h> defines - see libcurl-errors(3). If the CUR-
       LOPT_ERRORBUFFER(3) was set with curl_easy_setopt(3) there will be a readable error message in the error buffer when non-zero is returned.

EXAMPLE

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

SEE ALSO

       curl_easy_init(3), curl_easy_setopt(3), curl_multi_add_handle(3), curl_multi_perform(3), libcurl-errors(3),

libcurl 7.54.0							   May 02, 2016 					      curl_easy_perform(3)

Linux and UNIX Man Pages

curl_easy_send(3) [mojave man page]

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