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node-red-nodes/io/emoncms/88-emoncms.js

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/**
* Copyright 2013 Henrik Olsson henols@gmail.com
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
var RED = require(process.env.NODE_RED_HOME+"/red/red");
//The Server Definition - this opens (and closes) the connection
function EmoncmsServerNode(n) {
RED.nodes.createNode(this,n);
this.server = n.server;
this.name = n.name;
}
RED.nodes.registerType("emoncms-server",EmoncmsServerNode,{
credentials: {
apikey: {type:"text"}
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}
});
function Emoncms(n) {
RED.nodes.createNode(this,n);
this.emonServer = n.emonServer;
var sc = RED.nodes.getNode(this.emonServer);
this.baseurl = sc.server;
this.apikey = sc.credentials.apikey;
this.nodegroup = n.nodegroup || "";
var node = this;
if (this.baseurl.substring(0,5) === "https") { var http = require("https"); }
else { var http = require("http"); }
this.on("input", function(msg) {
this.url = this.baseurl + '/input/post.json?';
if(msg.payload.indexOf(':') > -1){
this.url += 'json={' + msg.payload + '}';
} else {
this.url += 'csv='+msg.payload;
}
this.url += '&apikey='+this.apikey;
var nodegroup = this.nodegroup || msg.nodegroup;
if(nodegroup != ""){
this.url += '&node=' + nodegroup;
}
if(typeof msg.time !== 'undefined'){
this.url += '&time=' + msg.time;
}
node.log("[emoncms] "+this.url);
http.get(this.url, function(res) {
node.log("Http response: " + res.statusCode);
msg.rc = res.statusCode;
msg.payload = "";
if ((msg.rc != 200) && (msg.rc != 404)) {
node.send(msg);
}
res.setEncoding('utf8');
res.on('data', function(chunk) {
msg.payload += chunk;
});
res.on('end', function() {
node.send(msg);
});
}).on('error', function(e) {
// node.error(e);
msg.rc = 503;
msg.payload = e;
node.send(msg);
});
});
}
RED.nodes.registerType("emoncms",Emoncms);