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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;
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var credentials = RED.nodes.getCredentials(n.id);
if (credentials) {
this.apikey = credentials.apikey;
}
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}
RED.nodes.registerType("emoncms-server",EmoncmsServerNode);
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var querystring = require('querystring');
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RED.httpAdmin.get('/emoncms-server/:id',function(req,res) {
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var credentials = RED.nodes.getCredentials(req.params.id);
if (credentials) {
res.send(JSON.stringify({apikey:credentials.apikey}));
} else {
res.send(JSON.stringify({}));
}
});
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RED.httpAdmin.delete('/emoncms-server/:id',function(req,res) {
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RED.nodes.deleteCredentials(req.params.id);
res.send(200);
});
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RED.httpAdmin.post('/emoncms-server/:id',function(req,res) {
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var body = "";
req.on('data', function(chunk) {
body+=chunk;
});
req.on('end', function(){
var newCreds = querystring.parse(body);
var credentials = RED.nodes.getCredentials(req.params.id)||{};
if (newCreds.apikey == null || newCreds.apikey == "") {
delete credentials.apikey;
} else {
credentials.apikey = newCreds.apikey;
}
RED.nodes.addCredentials(req.params.id,credentials);
res.send(200);
});
});
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.apikey;
this.topic = n.topic ||"";
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) {
var topic = this.topic || msg.topic;
var nodegroup = this.nodegroup || msg.nodegroup;
this.url = this.baseurl + '/input/post.json?json={' + topic + ':' + msg.payload+'}&apikey='+this.apikey;
if(nodegroup != ""){
this.url += '&node='+nodegroup;
}
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);