This module provides access to the BSD socket interface. This
module is generally more efficient than the
String based network
Network.Socket. For detailed documentation, consult
your favorite POSIX socket reference. All functions communicate
failures by converting the error number to
This module is made to be imported with
Network.Socket like so:
import Network.Socket hiding (send, sendTo, recv, recvFrom) import Network.Socket.ByteString.Lazy import Prelude hiding (getContents)
Send data to a socket
Send data to the socket. The socket must be in a connected state. Returns the number of bytes sent. Applications are responsible for ensuring that all data has been sent.
Because a lazily generated
ByteString may be arbitrarily long,
this function caps the amount it will attempt to send at 4MB. This
number is large (so it should not penalize performance on fast
networks), but not outrageously so (to avoid demanding lazily
computed data unnecessarily early). Before being sent, the lazy
ByteString will be converted to a list of strict
toChunks; at most 1024 chunks will be sent. Unix only.
Send data to the socket. The socket must be in a connected state. This function continues to send data until either all data has been sent or an error occurs. If there is an error, an exception is raised, and there is no way to determine how much data was sent. Unix only.
Receive data from a socket
Receive data from the socket. The socket must be in a connected
state. Data is received on demand, in chunks; each chunk will be
sized to reflect the amount of data received by individual
All remaining data from the socket is consumed. When there is no more data to be received, the receiving side of the socket is shut down. If there is an error and an exception is thrown, the socket is not shut down.
Receive data from the socket. The socket must be in a connected state. This function may return fewer bytes than specified. If the received data is longer than the specified length, it may be discarded depending on the type of socket. This function may block until a message arrives.
If there is no more data to be received, returns an empty