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Add TCP request node to TCP node "family"
This commit is contained in:
Dave C-J
parent
2c5d5148b8
commit
c10c687653
@ -57,8 +57,8 @@
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</script>
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<script type="text/x-red" data-help-name="tcp in">
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<p>Provides a choice of tcp inputs. Can either connect to a remote tcp port,
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or accept incoming connections.</p>
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<p>Provides a choice of tcp inputs. Can either connect to a remote tcp port,
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or accept incoming connections.</p>
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</script>
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<script type="text/javascript">
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@ -115,6 +115,7 @@
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});
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</script>
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<script type="text/x-red" data-template-name="tcp out">
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<div class="form-row">
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<label for="node-input-beserver"><i class="icon-resize-small"></i> Type</label>
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@ -143,12 +144,12 @@
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</script>
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<script type="text/x-red" data-help-name="tcp out">
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<p>Provides a choice of tcp outputs. Can either connect to a remote tcp port,
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<p>Provides a choice of tcp outputs. Can either connect to a remote tcp port,
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accept incoming connections, or reply to messages received from a TCP In node.</p>
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<p>Only <b>msg.payload</b> is sent.</p>
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<p>If <b>msg.payload</b> is a string containing a base64 encoding of binary
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data, the Base64 decoding option will cause it to be converted back to binary
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before being sent.</p>
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<p>Only <b>msg.payload</b> is sent.</p>
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<p>If <b>msg.payload</b> is a string containing a base64 encoding of binary
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data, the Base64 decoding option will cause it to be converted back to binary
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before being sent.</p>
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</script>
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<script type="text/javascript">
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@ -193,3 +194,75 @@
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}
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});
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</script>
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<script type="text/x-red" data-template-name="tcp request">
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<div class="form-row">
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<label for="node-input-server"><i class="fa fa-globe"></i> Server</label>
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<input type="text" id="node-input-server" placeholder="ip.address" style="width:50%">
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port <input type="text" id="node-input-port" style="width:50px">
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</div>
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<div class="form-row">
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<label for="node-input-out"><i class="fa fa-sign-out"></i> Return</label>
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<select type="text" id="node-input-out" style="width:52%;">
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<option value="time">after a fixed timeout of</option>
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<option value="char">when character received is</option>
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<option value="count">a fixed number of characters</option>
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</select>
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<input type="text" id="node-input-splitc" style="width:50px;">
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<span id="node-units"></span>
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</div>
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<div class="form-row">
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<label for="node-input-name"><i class="icon-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name">
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</div>
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<div class="form-tips"><b>Tip:</b> outputs a binary <b>Buffer</b>, so you may want to .toString() it.</div>
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<script>
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var previous = null;
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$("#node-input-out").on('focus', function () { previous = this.value; }).change(function() {
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if (previous == null) { previous = $("#node-input-out").val(); }
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if ($("#node-input-out").val() == "char") {
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if (previous != "char") $("#node-input-splitc").val("\\n");
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$("#node-units").text("");
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}
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else if ($("#node-input-out").val() == "time") {
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if (previous != "time") $("#node-input-splitc").val("0");
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$("#node-units").text("ms");
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}
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else {
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if (previous != "count") $("#node-input-splitc").val("12");
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$("#node-units").text("chars");
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}
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});
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</script>
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<script type="text/x-red" data-help-name="tcp request">
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<p>A simple TCP request node - sends the <b>msg.payload</b> to a server tcp port and expects a response.</p>
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<p>Connects, sends the "request", reads the "response" and disconnects. It can either count a number of
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returned characters into a fixed buffer, match a specified character before returning,
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or wait a fixed timeout from first reply and then return.</p>
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<p>The response will be output in <b>msg.payload</b> as a buffer, so you may want to .toString() it.</p>
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</script>
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<script type="text/javascript">
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RED.nodes.registerType('tcp request',{
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category: 'function',
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color:"Silver",
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defaults: {
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server: {value:"",required:true},
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port: {value:"",required:true,validate:RED.validators.number()},
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out: {value:"time",required:true},
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splitc: {value:"0",required:true},
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name: {value:""}
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},
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inputs:1,
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outputs:1,
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icon: "bridge-dash.png",
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label: function() {
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return this.name || "tcp:"+(this.server?this.server+":":"")+this.port;
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},
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labelStyle: function() {
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return this.name?"node_label_italic":"";
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}
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});
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</script>
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@ -309,6 +309,116 @@ module.exports = function(RED) {
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});
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}
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}
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RED.nodes.registerType("tcp out",TcpOut);
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function TcpGet(n) {
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RED.nodes.createNode(this,n);
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this.server = n.server;
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this.port = Number(n.port);
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this.out = n.out;
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this.splitc = n.splitc;
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if (this.out != "char") { this.splitc = Number(this.splitc); }
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else { this.splitc.replace("\\n","\n").replace("\\r","\r").replace("\\t","\t").replace("\\e","\e").replace("\\f","\f").replace("\\0","\0"); }
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var buf;
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if (this.out == "count") { buf = new Buffer(this.splitc); }
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else { buf = new Buffer(32768); } // set it to 32k... hopefully big enough for most.... but only hopefully
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var node = this;
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var client;
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this.on("input", function(msg) {
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var i = 0;
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if (!(msg.payload instanceof Buffer)) {
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msg.payload = msg.payload.toString();
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}
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client = net.Socket();
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client.setTimeout(socketTimeout);
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client.connect(node.port, node.server, function() {
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//node.log('client connected');
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client.write(msg.payload);
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});
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client.on('data', function(data) {
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//node.log("data", data.length, data);
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if (node.splitc === 0) {
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node.send({"payload": data});
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}
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else {
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for (var j = 0; j < data.length; j++ ) {
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if (node.out == "time") {
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// do the timer thing
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if (node.tout) {
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i += 1;
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buf[i] = data[j];
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}
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else {
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node.tout = setTimeout(function () {
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node.tout = null;
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var m = new Buffer(i+1);
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buf.copy(m,0,0,i+1);
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node.send({"payload": m});
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client.end();
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m = null;
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}, node.splitc);
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i = 0;
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buf[0] = data[j];
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}
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}
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// count bytes into a buffer...
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else if (node.out == "count") {
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buf[i] = data[j];
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i += 1;
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if ( i >= node.serialConfig.count) {
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node.send({"payload": buf});
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client.end();
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i = 0;
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}
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}
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// look for a char
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else {
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buf[i] = data[j];
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i += 1;
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if (data[j] == node.splitc) {
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var m = new Buffer(i);
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buf.copy(m,0,0,i);
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node.send({"payload": m});
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client.end();
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m = null;
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i = 0;
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}
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}
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}
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}
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});
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client.on('end', function() {
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//node.log('client disconnected');
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});
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client.on('error', function() {
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node.log('connect failed');
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if (client) { client.end(); }
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});
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client.on('timeout',function() {
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node.log('connect timeout');
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if (client) {
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client.end();
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setTimeout(function() {
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client.connect(node.port, node.server, function() {
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//node.log('client connected');
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client.write(msg.payload);
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});
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},reconnectTime);
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}
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});
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});
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this.on("close", function() {
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if (client) { buf = null; client.end(); }
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});
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}
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RED.nodes.registerType("tcp request",TcpGet);
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}
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