expressApp.get - Error Cannot GET ...

spitzlbergerj

Hi,

I intercept a webservice call via node_helper.js. Now I wanted to handle two more webservice calls. Unfortunately this doesn’t work.

my code:

const NodeHelper = require("node_helper")
var async = require('async');
var exec = require('child_process').exec;
var express = require('express');
var app = express();

...

module.exports = NodeHelper.create({
	
	start: function() {
		//console.error('Starting node helper: ' + this.name);
		var self = this;
		
		// Updateinterval ändern über Aufruf http://127.0.0.1:8080/MMM-CaravanPiPosition/changeUpdateInterval
		this.expressApp.get('/' + this.name + '/changeUpdateInterval', function (req, res) {
			res.send('Change UpdateInterval from '+ myUpdateInterval);
			self.changeUpdateInterval();
		});
		
		// Kalibrierung anzeigen über Aufruf http://127.0.0.1:8080/MMM-CaravanPiPosition/setCalibration
		this.expressApp.get('/' + this.name + '/setCalibration', function (req, res) {
			res.send('set Calibration');
			valueListNHCaravanPiPosition[0]["cal"] = 1;
		});
		
		// Kalibrierung löschen über Aufruf http://127.0.0.1:8080/MMM-CaravanPiPosition/unsetCalibration
		this.expressApp.get('/' + this.name + '/unsetCalibration', function (req, res) {
			res.send('unset Calibration');
			valueListNHCaravanPiPosition[0]["cal"] = 0;
		});
	},
...

The call of http://127.0.0.1:8080/MMM-CaravanPiPosition/changeUpdateInterval works as desired.

The calls of http://127.0.0.1:8080/MMM-CaravanPiPosition/setCalibration and … unsetCalibration does not work.

Instead the error message Cannot GET /MMM-CaravanPiPosition/setCalibration is displayed.

what am i doing wrong? can’t several different webservice calls be processed?

Thanks for every help

Sepp

sdetweil

@spitzlbergerj said in expressApp.get - Error Cannot GET ...:

this.expressApp.

where is expressApp set?

typically it is

const app = express()
  // setup the pattern you listen for
  app.get(url_pattern, (req,res) => {})

spitzlbergerj

Hi Sam,
yes, I had always asked myself that, but I am still a Javascript Newby. I got the code from a forum post. After it worked with the first pattern, I thought, that’s because of my low JavaScript knowledge.

I have now changed it with your help. And now it works.

Thank you very much!
Sepp

sdetweil

@spitzlbergerj cool!!