Node.js无法调用未定义的方法“ on”进行响应

Question

The get method was working until I added the extra code:

var io = require('socket.io');
var express = require('express');
var app = express();
var fs = require('fs');

var http = require("http"),
    faroo_api = 'hidden',
    url = "http://www.faroo.com/api?q=knicks&start=1&length=10&l=en&src=news&f=json&key=";


var request = http.get(url + faroo_api, function (err, response) {    
    var buffer = "", 
        data;

    if(err){
        console.log("there was an error");
    }
    response.on("data", function (chunk) {
        buffer += chunk;
    }); 

    response.on("end", function (err) {
        data = JSON.parse(buffer);
        console.log(data);
    }); 
}); 

var serv = http.createServer(function(request, res){
    fs.readFile(__dirname + '/text.html', function(err, data){
        if(err){
            res.writeHead(500, {'Content-Type': 'text/plain'});
            return res.end('Error');
        }
        res.writeHead(200, {'Content-Type': 'text/html'});
        res.end(data);
    });
});
serv.listen(8000);

var serv_io = io.listen(serv);
serv_io.on('connection', function(socket){
    socket.emit('messages', data);
});

now its giving this error message. I'm not sure what's going wrong. I'm guessing the response is being blocked by something but i'm not sure.

there was an error
/Users/AmmarKarim/Desktop/Apps/Projectapp/app.js:21
    response.on("data", function (chunk) {
             ^
TypeError: Cannot call method 'on' of undefined
    at ClientRequest.<anonymous> (/Users/AmmarKarim/Desktop/Apps/Projectapp/app.js:21:14)
    at ClientRequest.g (events.js:180:16)
    at ClientRequest.emit (events.js:95:17)
    at HTTPParser.parserOnIncomingClient [as onIncoming] (http.js:1693:21)
    at HTTPParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:122:23)
    at Socket.socketOnData [as ondata] (http.js:1588:20)
    at TCP.onread (net.js:528:27)

let me know if you need the html.

Answer 1

function (err, response)

This is the wrong callback. The callback to http.get (and http.request) is simply function (response)

Answer 2

Please refer this demo:

http.get(options[, callback])# Since most requests are GET requests without bodies, Node provides this convenience method. The only difference between this method and http.request() is that it sets the method to GET and calls req.end() automatically.

Example:

http.get("http://www.google.com/index.html", function(res) {
  console.log("Got response: " + res.statusCode);
}).on('error', function(e) {
  console.log("Got error: " + e.message);
});