How to handle code exceptions in node.js?

Question

I went through the documentation of Express, and the part describing error handling is completely opaque to me.

I figured the app they\'re referring to

Answer 1

You can use the default error handler that express uses, which is actually connect error handler.

var app = require('express').createServer();

app.get('/', function(req, res){
  throw new Error('Error thrown here!');
});

app.configure(function(){
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});

app.listen(3000);

Update For your code, you actually need to capture the error and pass it to express like this

var express = require('express');
var http = require('http');

var app = express.createServer();

app.get('/', function (req, res, next) {
  console.log("debug", "calling");
  var options = {
    host:'www.google.com',
    port:80,
    path:"/"
  };
  http.get(options,
    function (response) {
      response.on("data", function (chunk) {
        try {
          console.log("data: " + chunk);
          chunk.call(); // no such method; throws here

        }
        catch (err) {
          return next(err);
        }
      });
    }).on('error', function (e) {
      console.log("error connecting" + e.message);
    });
});

app.configure(function () {
  app.use(express.errorHandler({ dumpExceptions:true, showStack:true }));
});

app.listen(3000);