node-red/nodes/core/io/22-websocket.html

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  Copyright 2013 IBM Corp.

  Licensed under the Apache License, Version 2.0 (the "License");
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  distributed under the License is distributed on an "AS IS" BASIS,
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<!-- WebSocket Input Node -->
<script type="text/x-red" data-template-name="websocket in">
    <div class="form-row">
        <label for="node-input-server"><i class="fa fa-bookmark"></i> Path</label>
        <input type="text" id="node-input-server">
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
</script>

<script type="text/x-red" data-help-name="websocket in">
    <p>WebSocket input node.</p>
    <p>By default, the data received from the WebSocket will be in <b>msg.payload</b>.
    The listener can be configured to expect a properly formed JSON string, in which
    case it will parse the JSON and send on the resulting object as the entire message.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('websocket in',{
        category: 'input',
        defaults: {
            name: {value:""},
            server: {type:"websocket-listener"}
        },
        color:"rgb(215, 215, 160)",
        inputs:0,
        outputs:1,
        icon: "white-globe.png",
        label: function() {
            var wsNode = RED.nodes.node(this.server);
            return this.name||(wsNode?"[ws] "+wsNode.label():"websocket");
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        }
    });
</script>

<!-- WebSocket out Node -->
<script type="text/x-red" data-template-name="websocket out">
    <div class="form-row">
        <label for="node-input-server"><i class="fa fa-bookmark"></i> Path</label>
        <input type="text" id="node-input-server">
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
</script>

<script type="text/x-red" data-help-name="websocket out">
    <p>WebSocket out node.</p>
    <p>By default, <b>msg.payload</b> will be sent over the WebSocket. The listener
    can be configured to encode the entire message object as a JSON string and send that
    over the WebSocket.</p>

    <p>If the message arriving at this node started at a WebSocket In node, the message
    will be sent back to the client that triggered the flow. Otherwise, the message
    will be broadcast to all connected clients.</p>
    <p>If you want to broadcast a message that started at a WebSocket In node, you
    should delete the <b>msg._session</b> property within the flow</p>.
</script>

<script type="text/javascript">
    RED.nodes.registerType('websocket out',{
        category: 'output',
        defaults: {
            name: {value:""},
            server: {type:"websocket-listener", required:true}
        },
        color:"rgb(215, 215, 160)",
        inputs:1,
        outputs:0,
        icon: "white-globe.png",
        align: "right",
        label: function() {
            var wsNode = RED.nodes.node(this.server);
            return this.name||(wsNode?"[ws] "+wsNode.label():"websocket");
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        }
    });
</script>

<!-- WebSocket Server configuration node -->
<script type="text/x-red" data-template-name="websocket-listener">
    <div class="form-row">
        <label for="node-config-input-path"><i class="fa fa-bookmark"></i> Path</label>
        <input type="text" id="node-config-input-path" placeholder="/ws/example">
    </div>
    <div class="form-row">
        <label for="node-config-input-wholemsg">&nbsp;</label>
        <select type="text" id="node-config-input-wholemsg" style="width: 70%;">
            <option value="false">Send/Receive payload</option>
            <option value="true">Send/Receive entire message</option>
        </select>
    </div>
    <div class="form-tips">
    Be default, <code>payload</code> will contain the data to be sent over, or received from a websocket.
    The listener can be configured to send or receive the entire message object as a JSON formatted string.
    <p id="node-config-ws-tip">This path will be relative to <code><span id="node-config-ws-path"></span></code>.</p>
    </div>
</script>

<script type="text/x-red" data-help-name="websocket-listener">
   <p>This configuration node creates a WebSocket Server using the specified path</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('websocket-listener',{
        category: 'config',
        defaults: {
            path: {value:"",required:true,validate:RED.validators.regex(/^((?!\/debug\/ws).)*$/) },
            wholemsg: {value:"false"}
        },
        inputs:0,
        outputs:0,
        label: function() {
            var root = RED.settings.httpNodeRoot;
            if (root.slice(-1) != "/") { 
                root = root+"/";
            }
            if (this.path.charAt(0) == "/") {
                root += this.path.slice(1);
            } else {
                root += this.path;
            }
            return root;
        },
        oneditprepare: function() {
            var root = RED.settings.httpNodeRoot;
            if (root.slice(-1) == "/") { 
                root = root.slice(0,-1);
            }
            if (root == "") {
                $("#node-config-ws-tip").hide();
            } else {
                $("#node-config-ws-path").html(root);
                $("#node-config-ws-tip").show();
            }
            //document.getElementById("node-config-wsdocpath").innerHTML=
        }
    });
</script>