/*
Receive a message part from a socket.
For a description of flags, see: http://api.zeromq.org/2-2:zmq-recv#toc2
*/
func (soc *Socket) RecvBytes(flags Flag) ([]byte, error) {
if !soc.opened {
return []byte{}, ErrorSocketClosed
}
var msg C.zmq_msg_t
if i, err := C.zmq_msg_init(&msg); i != 0 {
return []byte{}, errget(err)
}
defer C.zmq_msg_close(&msg)
var size C.int
var err error
var i C.int
i, err = C.zmq_recv(soc.soc, &msg, C.int(flags))
if i == 0 {
size = C.int(C.zmq_msg_size(&msg))
} else {
size = -1
}
if size < 0 {
return []byte{}, errget(err)
}
if size == 0 {
return []byte{}, nil
}
data := make([]byte, int(size))
C.my_memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&msg), C.size_t(size))
return data, nil
}
/*
Receive a message part with metadata.
Metadata is added to messages that go through the 0MQ security mechanism.
Standard metadata properties are: Identity, Socket-Type, User-Id.
This requires ZeroMQ version 4.1.0. Lower versions will return the message part without metadata.
The returned metadata map contains only those properties that exist on the message.
For a description of flags, see: http://api.zeromq.org/4-0:zmq-msg-recv#toc2
For a description of metadata, see: http://api.zeromq.org/4-1:zmq-msg-gets#toc3
*/
func (soc *Socket) RecvBytesWithMetadata(flags Flag, properties ...string) (msg []byte, metadata map[string]string, err error) {
metadata = make(map[string]string)
var m C.zmq_msg_t
if i, err := C.zmq_msg_init(&m); i != 0 {
return []byte{}, metadata, errget(err)
}
defer C.zmq_msg_close(&m)
size, err := C.zmq_msg_recv(&m, soc.soc, C.int(flags))
if size < 0 {
return []byte{}, metadata, errget(err)
}
data := make([]byte, int(size))
if size > 0 {
C.my_memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&m), C.size_t(size))
}
if _, minor, _ := Version(); minor > 0 {
for _, p := range properties {
ps := C.CString(p)
s, err := C.zmq_msg_gets(&m, ps)
if err == nil {
metadata[p] = C.GoString(s)
}
C.free(unsafe.Pointer(ps))
}
}
return data, metadata, nil
}
/*
Receive a message part from a socket.
For a description of flags, see: http://api.zeromq.org/3-2:zmq-msg-recv#toc2
*/
func (soc *Socket) RecvBytes(flags Flag) ([]byte, error) {
var msg C.zmq_msg_t
if i, err := C.zmq_msg_init(&msg); i != 0 {
return []byte{}, errget(err)
}
defer C.zmq_msg_close(&msg)
size, err := C.zmq_msg_recv(&msg, soc.soc, C.int(flags))
if size < 0 {
return []byte{}, errget(err)
}
if size == 0 {
return []byte{}, nil
}
data := make([]byte, int(size))
C.my_memcpy(unsafe.Pointer(&data[0]), C.zmq_msg_data(&msg), C.size_t(size))
return data, nil
}