node-red/nodes/core/io/31-tcpin.html

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  Copyright 2013 IBM Corp.

  Licensed under the Apache License, Version 2.0 (the "License");
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<script type="text/x-red" data-template-name="tcp in">
    <div class="form-row">
        <label for="node-input-server"><i class="fa fa-dot-circle-o"></i> Type</label>
        <select id="node-input-server" style="width:120px; margin-right:5px;">
            <option value="server">Listen on</option>
            <option value="client">Connect to</option>
        </select>
        port <input type="text" id="node-input-port" style="width: 50px">
    </div>
    <div class="form-row hidden" id="node-input-host-row" style="padding-left: 110px;">
        at host <input type="text" id="node-input-host" placeholder="localhost" style="width: 60%;">
    </div>

    <div class="form-row">
        <label><i class="fa fa-sign-out"></i> Output</label>
        a
        <select id="node-input-datamode" style="width:110px;">
            <option value="stream">stream of</option>
            <option value="single">single</option>
        </select>
        <select id="node-input-datatype" style="width:140px;">
            <option value="buffer">Buffer</option>
            <option value="utf8">String</option>
            <option value="base64">Base64 String</option>
        </select>
        payload<span id="node-input-datamode-plural">s</span>
    </div>

    <div id="node-row-newline" class="form-row hidden" style="padding-left: 110px;">
        delimited by <input type="text" id="node-input-newline" style="width: 110px;">
    </div>

    <div class="form-row">
        <label for="node-input-topic"><i class="fa fa-tasks"></i> Topic</label>
        <input type="text" id="node-input-topic" placeholder="Topic">
    </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="tcp in">
    <p>Provides a choice of tcp inputs. Can either connect to a remote tcp port,
       or accept incoming connections.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('tcp in',{
        category: 'input',
        color:"Silver",
        defaults: {
            server: {value:"server",required:true},
            host: {value:"",validate:function(v) { return (this.server == "server")||v.length > 0;} },
            port: {value:"",required:true,validate:RED.validators.number()},
            datamode:{value:"stream"},
            datatype:{value:"buffer"},
            newline:{value:""},
            topic: {value:""},
            name: {value:""},
            base64: {/*deprecated*/ value:false,required:true}
        },
        inputs:0,
        outputs:1,
        icon: "bridge-dash.png",
        label: function() {
            return this.name || "tcp:"+(this.host?this.host+":":"")+this.port;
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        },
        oneditprepare: function() {
            var updateOptions = function() {
                var sockettype = $("#node-input-server option:selected").val();
                if (sockettype == "client") {
                    $("#node-input-host-row").show();
                } else {
                    $("#node-input-host-row").hide();
                }
                var datamode = $("#node-input-datamode option:selected").val();
                var datatype = $("#node-input-datatype option:selected").val();
                if (datamode == "stream") {
                    $("#node-input-datamode-plural").show();
                    if (datatype == "utf8") {
                        $("#node-row-newline").show();
                    } else {
                        $("#node-row-newline").hide();
                    }
                } else {
                    $("#node-input-datamode-plural").hide();
                    $("#node-row-newline").hide();
                }
            };
            updateOptions();
            $("#node-input-server").change(updateOptions);
            $("#node-input-datatype").change(updateOptions);
            $("#node-input-datamode").change(updateOptions);
        }
    });
</script>


<script type="text/x-red" data-template-name="tcp out">
    <div class="form-row">
        <label for="node-input-beserver"><i class="fa fa-dot-circle-o"></i> Type</label>
        <select id="node-input-beserver" style="width:150px; margin-right:5px;">
            <option value="server">Listen on</option>
            <option value="client">Connect to</option>
            <option value="reply">Reply to TCP</option>
        </select>
        <span id="node-input-port-row">port <input type="text" id="node-input-port" style="width: 50px"></span>
    </div>

    <div class="form-row hidden" id="node-input-host-row" style="padding-left: 110px;">
        at host <input type="text" id="node-input-host" placeholder="localhost" style="width: 60%;">
    </div>

    <div class="form-row hidden" id="node-input-end-row">
        <label>&nbsp;</label>
        <input type="checkbox" id="node-input-end" style="display: inline-block; width: auto; vertical-align: top;">
        <label for="node-input-end" style="width: 70%;">Close connection after each message is sent ?</label>
    </div>

    <div class="form-row">
        <label>&nbsp;</label>
        <input type="checkbox" id="node-input-base64" placeholder="base64" style="display: inline-block; width: auto; vertical-align: top;">
        <label for="node-input-base64" style="width: 70%;">Decode Base64 message ?</label>
    </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>

    <div class="form-tips hidden" id="fin-tip">
        <b>Note:</b> Closing the connection after each message is generally not a good thing - but is useful to indicate an end-of-file for example.
    </div>
    <div class="form-tips hidden" id="fin-tip2">
        <b>Note:</b> Closing the connection after each message is generally not a good thing - but is useful to indicate an end-of-file for example. The receiving client will need to reconnect.
    </div>
</script>

<script type="text/x-red" data-help-name="tcp out">
    <p>Provides a choice of tcp outputs. Can either connect to a remote tcp port,
    accept incoming connections, or reply to messages received from a TCP In node.</p>
    <p>Only <b>msg.payload</b> is sent.</p>
    <p>If <b>msg.payload</b> is a string containing a Base64 encoding of binary
    data, the Base64 decoding option will cause it to be converted back to binary
    before being sent.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('tcp out',{
        category: 'output',
        color:"Silver",
        defaults: {
            host: {value:"",validate:function(v) { return (this.beserver != "client")||v.length > 0;} },
            port: {value:"",validate:function(v) { return (this.beserver == "reply")||RED.validators.number()(v) } },
            beserver: {value:"client",required:true},
            base64: {value:false,required:true},
            end: {value:false,required:true},
            name: {value:""}
        },
        inputs:1,
        outputs:0,
        icon: "bridge-dash.png",
        align: "right",
        label: function() {
            return this.name || "tcp:"+(this.host?this.host+":":"")+this.port;
        },
        labelStyle: function() {
            return (this.name)?"node_label_italic":"";
        },
        oneditprepare: function() {
            var updateOptions = function() {
                var sockettype = $("#node-input-beserver option:selected").val();
                if (sockettype == "reply") {
                    $("#node-input-port-row").hide();
                    $("#node-input-host-row").hide();
                    $("#node-input-end-row").hide();
                } else {
                    $("#node-input-port-row").show();
                    $("#node-input-end-row").show();
                }

                if (sockettype == "client") {
                    $("#node-input-host-row").show();
                    $("#fin-tip").show();
                } else {
                    $("#node-input-host-row").hide();
                    $("#fin-tip").hide();
                }

                if (sockettype == "server") {
                    $("#fin-tip2").show();
                }
                else {
                    $("#fin-tip2").hide();
                }

            };
            updateOptions();
            $("#node-input-beserver").change(updateOptions);
        }
    });
</script>


<script type="text/x-red" data-template-name="tcp request">
    <div class="form-row">
        <label for="node-input-server"><i class="fa fa-globe"></i> Server</label>
        <input type="text" id="node-input-server" placeholder="ip.address" style="width:50%">
        &nbsp;port <input type="text" id="node-input-port" style="width:50px">
    </div>
    <div class="form-row">
        <label for="node-input-out"><i class="fa fa-sign-out"></i> Return</label>
        <select type="text" id="node-input-out" style="width:52%;">
            <option value="time">after a fixed timeout of</option>
            <option value="char">when character received is</option>
            <option value="count">a fixed number of characters</option>
            <option value="sit">never. Keep connection open</option>
        </select>
        <input type="text" id="node-input-splitc"  style="width:50px;">
        <span id="node-units"></span>
    </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>
    <div class="form-tips"><b>Tip:</b> outputs a binary <b>Buffer</b>, so you may want to .toString() it.</div>
    <script>
        var previous = null;
        $("#node-input-out").on('focus', function () { previous = this.value; }).change(function() {
            if (previous == null) { previous = $("#node-input-out").val(); }
            if ($("#node-input-out").val() == "char") {
                if (previous != "char") $("#node-input-splitc").val("\\n");
                $("#node-units").text("");
            }
            else if ($("#node-input-out").val() == "time") {
                if (previous != "time") $("#node-input-splitc").val("0");
                $("#node-units").text("ms");
            }
            else if ($("#node-input-out").val() == "count") {
                if (previous != "count") $("#node-input-splitc").val("12");
                $("#node-units").text("chars");
            }
            else {
                if (previous != "sit") $("#node-input-splitc").val("0");
                $("#node-units").text("");
            }
        });
</script>

<script type="text/x-red" data-help-name="tcp request">
    <p>A simple TCP request node - sends the <b>msg.payload</b> to a server tcp port and expects a response.</p>
    <p>Connects, sends the "request", reads the "response". It can either count a number of
    returned characters into a fixed buffer, match a specified character before returning,
    wait a fixed timeout from first reply and then return, or just sit and wait for data.</p>
    <p>The response will be output in <b>msg.payload</b> as a buffer, so you may want to .toString() it.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('tcp request',{
        category: 'function',
        color:"Silver",
        defaults: {
            server: {value:"",required:true},
            port: {value:"",required:true,validate:RED.validators.number()},
            out: {value:"time",required:true},
            splitc: {value:"0",required:true},
            name: {value:""}
        },
        inputs:1,
        outputs:1,
        icon: "bridge-dash.png",
        label: function() {
            return this.name || "tcp:"+(this.server?this.server+":":"")+this.port;
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        }
    });
</script>