07. HTTP CLIENT

HTTP CLIENT (Exercise 7 of 13)

Write a program that performs an HTTP GET request to a URL provided to you
as the first command-line argument. Write the String contents of each
"data" event from the response to a new line on the console (stdout).

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HINTS

For this exercise you will need to use the http core module.

Documentation on the http module can be found by pointing your browser
here:
file:///home/ubuntu/.nvm/versions/node/v6.11.2/lib/node_modules/learnyouno
de/node_apidoc/http.html

The http.get() method is a shortcut for simple GET requests, use it to
simplify your solution. The first argument to http.get() can be the URL
you want to GET; provide a callback as the second argument.

Unlike other callback functions, this one has the signature:

 function callback (response) { /* ... */ }  

Where the response object is a Node Stream object. You can treat Node
Streams as objects that emit events. The three events that are of most
interest are: "data", "error" and "end". You listen to an event like so:

 response.on("data", function (data) { /* ... */ })  

The "data" event is emitted when a chunk of data is available and can be
processed. The size of the chunk depends upon the underlying data source.

The response object / Stream that you get from http.get() also has a
setEncoding() method. If you call this method with "utf8", the "data"
events will emit Strings rather than the standard Node Buffer objects
which you have to explicitly convert to Strings.

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HTTP CLIENT (Exercise 7 of 13)

//////////////////////////////////////////////
/*  function exercise 7  HTTP CLIENT        */
//////////////////////////////////////////////


function httpClient(){
    
    var http = require('http'); // load http module
    var url = process.argv[2]; // get url from args
    http.get(url, function(response) {
        
        response.setEncoding('utf8'); // the "data" events will emit Strings rather than the standard Node Buffer objects

        response.on("data", function(data) {
            
            console.log(data);  // Print data
                  
        });
                    
    });
    
}

    httpClient();

Your submission results compared to the expected:

             ACTUAL                                 EXPECTED                

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"gutta" == "gutta"
"Good oil" == "Good oil"
"Fisho" == "Fisho"
"Feral" == "Feral"
"Apples" == "Apples"
"Milk bar" == "Milk bar"
"Bush telly" == "Bush telly"
"Rollie" == "Rollie"
"Grog" == "Grog"
"Rego" == "Rego"
"" == ""

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✓

Submission results match expected

PASS Your solution to HTTP CLIENT passed!

Here's the official solution in case you want to compare notes:

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    var http = require('http')
    
    http.get(process.argv[2], function (response) {
      response.setEncoding('utf8')
      response.on('data', console.log)
      response.on('error', console.error)
    }).on('error', console.error)

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