How can i pass query / parameters from URL to module

AxLed

Dear Developers,

i want to redesign one of my modules. Therefore i need a hint how i can make the following possible.

I want to pass a query / parameters from a module URL, f.e.

http://IPofMM:8080/MMM-Navigate/index?value1=xxx&value2=yy

to my module.
What do i need?

a page in my module folder index.js(?)
code do read the values of querystring and do something with it.

Maybe somebody can give me a tip how to do that or in which module it was already realized (except MMM-Remote-Control).

Regards

AxLED

sdetweil

@AxLed sorry. not quite sure what you mean…

u want to pass the info from where (how is the user presenting this info) to where

AxLed

@sdetweil
User is presenting / entering datas by URL in his browser and module should be able to handle the datas.
AxLED

sdetweil

@AxLed and did u setup an express path that invokes your node module function?

the url parms should be there

AxLed

@sdetweil
No i didnt set any path so far, but express path seems to be the right search word and helps.
If i understood the documentation right, express path has to be located in node_helper.js.
But i still dont know how to move forward with this information.
Are there some modules which are using express path, where i can try to figure out how it works?

Greetings

AxLED

I

sdetweil

@AxLed MMM-ImagesPhotos uses it…

the Module wants to use request, so issues a request to a local server (express path)
which invokes the routine to get the list of photos//

(instead of doing the sendSocketNotification to the node_module…)

the express routine is like a cgi pgm invocation…

from
https://expressjs.com/en/guide/routing.html

Route parameters

the path can autoparse the url
Route path: /users/:userId/books/:bookId
Request URL: http://localhost:3000/users/34/books/8989
req.params: { “userId”: “34”, “bookId”: “8989” }

but the result, net, is the parms are in the req (uest) parameter object when the routine is called

AxLed

@sdetweil
Thanks for the response, it think now i have enough to read and i will try to get in up and running.

I will give feedback within the next day.

AxLED

sdetweil

@AxLed cooll… standing by!

sdetweil

@AxLed so, it should be as simple as

const express = require('express')

// setup server path handler, for http get request
this.expressApp.get("/MMM-Navigate",(req,res) =>{this.someFunction(req,res)});

// handler dump request object
someFunction: function(request,response){
     console.log("request data="+JSON.stringify(request))
    response.send("Hello from MMM-Navigate");
}

A Former User

Here is another example of express;

const express = require('express')
const bodyParser = require('body-parser')

// in your member function of node_helper.js, usually it will be `.start()`

this.expressApp.use(bodyParser.json())
this.expressApp.use(bodyParser.urlencoded({extended: true}))
var process = (req, res) => {
  var subpath = req.params.subpath
  if (CHECK_SOME_CONDITION) {
    var requestObj = {
      path: subpath,
      query: req.query,
      post: req.body,
      method: req.method,
    }
    this.sendSocketNotification("REQUEST_COMING", requestObj)
    res.status(200).send({status: 200})
  } else {
    res.status(400).send({status: 400})
  }
}

this.expressApp.get("/YOUR_PATH/:subpath", process)
this.expressApp.post("/YOUR_PATH/:subpath", process) // when you need POST method.