Manual Reference Pages - CURL_EASY_SEND (3)
curl_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 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
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(). Note that
curl_easy_send(3) will not work on connections that were created without
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_ACTIVESOCKET(3) to obtain the
socket; use your operating 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 theres no socket available to use from the previous transfer, this function
See sendrecv.c in docs/examples directory for usage example.
|libcurl 7.18.2 ||CURL_EASY_SEND (3) ||29 April 2008 |
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