curl_easy_recv(3) - phpMan

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 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 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 num-
       ber of received bytes.

       To establish the connection, set CURLOPT_CONNECT_ONLY option before calling curl_easy_per-
       form(3).  Note that curl_easy_recv(3) does not work on connections that were created with-
       out this option.

       You must ensure that the socket has data to read before calling curl_easy_recv(3),  other-
       wise  the  call  will  return CURLE_AGAIN - the socket is used in non-blocking mode inter-
       nally. 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)

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