Sockets

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`Sockets`

Unsupported in Public Cloud

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Sockets[]

returns all active socket connections initiated by your current Wolfram Language session.

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returns all sockets connected to your current session, including remote sockets originating outside your current session.

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Sockets[spec]

returns only sockets specified by spec.

Details

Returned sockets are all given as SocketObject constructs.
Possible forms of spec include:

	"Remote"	sockets that originate outside the current session
	"Local"	sockets that originate within the current session
	"Server"	local sockets opened with SocketOpen
	"Client"	local sockets connected with SocketConnect
	"TCP"	sockets with protocol of "TCP"
	"ZMQ"	sockets with protocol of "ZMQ"
	{"ZMQ","type"}	sockets with protocol "ZMQ_type"
	All	all local and remote sockets

Close closes socket connections and frees associated resources.
If a socket is opened with SocketOpen and connected to in the same Wolfram Language session with SocketConnect, both sides of the socket will have an associated SocketObject.

Examples

open allclose all

Basic Examples (1)Summary of the most common use cases

Open a socket and show all currently active sockets:

In[1]:=1

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https://wolfram.com/xid/0b8b7m498v-snml4q

Out[1]=1

Close the socket:

In[2]:=2

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https://wolfram.com/xid/0b8b7m498v-z0uma

Out[2]=2

Scope (2)Survey of the scope of standard use cases

Only see local sockets on your machine:

In[1]:=1

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https://wolfram.com/xid/0b8b7m498v-5c5nf2

Out[1]=1

Close the socket:

In[2]:=2

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https://wolfram.com/xid/0b8b7m498v-qvl0t

Out[2]=2

Listen on a socket with SocketListen and see the socket that is listened on:

In[1]:=1

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https://wolfram.com/xid/0b8b7m498v-88uyor

Out[1]=1

In[2]:=2

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https://wolfram.com/xid/0b8b7m498v-i08ssz

Out[2]=2

The socket can also be viewed with the property "Socket" on the SocketListener[…] object:

In[3]:=3

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https://wolfram.com/xid/0b8b7m498v-8zwa7

Out[3]=3

Close the socket and delete the listener:

In[4]:=4

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https://wolfram.com/xid/0b8b7m498v-de1a1o

Out[4]=4

In[5]:=5

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https://wolfram.com/xid/0b8b7m498v-fptktw

Possible Issues (1)Common pitfalls and unexpected behavior

When connecting to a server socket with SocketConnect in the same session, the socket returned by SocketConnect is different than the socket object returned by the server socket's "ConnectedClients" property.

Open a server socket and connect a client to it:

In[1]:=1