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curl_easy_send
Section: libcurl Manual (3)
Updated: 29 April 2008
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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 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_LASTSOCKET to obtain the
socket; use your operating system facilities like select(2) to check if
it can be written to.
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.
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)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- AVAILABILITY
-
- RETURN VALUE
-
- EXAMPLE
-
- SEE ALSO
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