curl_easy_send(3) libcurl Manual curl_easy_send(3)NAMEcurl_easy_send - sends raw data over an "easy" connection
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 proto‐
cols 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_get‐
info(3) with CURLINFO_LASTSOCKET to obtain the socket; use your operat‐
ing system facilities like select(2) to check if it can be written to.
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.
If there's no socket available to use from the previous transfer, this
function returns CURLE_UNSUPPORTED_PROTOCOL.
See sendrecv.c in docs/examples directory for usage example.
SEE ALSOcurl_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)