curl_easy_recv(3)						  libcurl Manual						 curl_easy_recv(3)

NAME

       curl_easy_recv - receives raw data on an "easy" connection

SYNOPSIS

       #include <curl/easy.h>

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

DESCRIPTION

       This  function receives raw data from the established connection. You may use it together with curl_easy_send(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 your buffer that will get the received data. buflen is the maximum amount of data you can get in that buffer. The
       variable n points to will receive the number of received bytes.

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

       You  must ensure that the socket has data to read before calling curl_easy_recv(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 has any data you can read.

AVAILABILITY

       Added in 7.18.2.

RETURN VALUE

       On success, returns CURLE_OK, stores the received data into buffer, and the number of bytes it actually read into *n.

       On failure, returns the appropriate error code.

       If  there  is  no data to read, the function returns CURLE_AGAIN. Use your operating system facilities to wait until the data is ready, and
       retry.

       Reading exactly 0 bytes would indicate a closed connection.

       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_send(3)

libcurl 7.18.2							   29 April 2008						 curl_easy_recv(3)