1

I have a python script which resides on a web-server (running node.js) and does some machine learning computation. The data has to be supplied to the python script using javascript running in web-browser. How can this be done? I want to know the complete setup. For now, the server is the localhost only.

Improve this question
1
  • One way to do it is to have your browser-side JavaScript send over the data to your server through an API. And then have your server-side JavaScript call the Python script and pass in the data as if it were a Bash command by using exec. Commented Sep 7, 2017 at 14:14

2 Answers 2

Reset to default
1

The best way is to use zerorpc, a socket server and client for both Python and Node.js.

Installing on Python:

pip install zerorpc

Installing on Node:

npm install zerorpc

Python server file:

import zerorpc

class HelloRPC(object):
   def hello(self, name):

      print "message from host: %s" % name

      return raw_input("Enter your message: ") 

s = zerorpc.Server(HelloRPC())
s.bind("tcp://0.0.0.0:4242")
s.run()

Node.js client file:

var express = require('express');
var bodyParser = require('body-parser');
var app = express();
var zerorpc = require("zerorpc");

var client = new zerorpc.Client();
client.connect("tcp://127.0.0.1:4242");

app.use(bodyParser.urlencoded({ extended: true })); 
app.post('/myaction', function(req, res) {
  client.invoke("hello", "RPC", function(error, res, more) {
  console.log(res);
  res.send(req.body.name);
  });

});

app.listen(8080, function() {
console.log('Server running at http://127.0.0.1:8080/');
});

While the example code here is relatively simple, it should get you started. The overall logic of this setup is as follows:

  1. Use express to get data from webpage (stored as req.body.name)
  2. Take this data and send it via zerorpc to your Python server, which can process the data and send it back to the Node.js zerorpc client.
Improve this answer
Sign up to request clarification or add additional context in comments.

Comments

0

I believe you need a simple API on the server which accept input from the client which can be done via JavaScript.

There are several technologies you could have a look at:

  • Ajax.
  • WebSockets.
Improve this answer

Comments