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curl_easy_send(3) [centos man page]

curl_easy_send(3)						  libcurl Manual						 curl_easy_send(3)

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 pro- tocols 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. 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_recv(3) libcurl 7.18.2 29 April 2008 curl_easy_send(3)

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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)
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