Node.js Recipes by Cory Gackenheimer (auth.)

By Cory Gackenheimer (auth.)

Node.js Recipes is your one-stop reference for fixing Node.js difficulties. jam-packed with beneficial recipes that stick with a problem/solution structure, you could search for recipes for plenty of occasions that you could be come upon on your day by day server-side development.

Node.js is available to people who not just appreciate in server-side programming but additionally net builders who comprehend the ever present language of the internet. Node.js Recipes covers the entire crucial materials required to develop into a pro Node.js developer very quickly - make it your vital reference today.

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To do this you can create a simple server (Listing 2-26) that will listen for the socket and its data as well as send a response back to the sockets. Listing 2-26. js This server will listen for a connection, and then greet the new connection with a “hello” via the socket stream. It will also listen for data from the socket, which is expected to be a JSON object in this case. You can then parse the data from the “readable” stream and return a response with the data parsed. The socket connection, shown in Listing 2-27, shows how you can create this socket that will connect to the server from Listing 2-26 and send communication between the two.

In the first server instance, within the connectionListener callback, the conn argument was passed. Server object is really a socket that will listen for connections, this conn argument represents the socket you want to work with. The very first thing this server does is emit a greeting to the connection. write() method. write() method takes one required argument, the data that are to be written, and two optional arguments. These optional arguments are encoding, which can be used to set the encoding type of the socket.

53 Chapter 3 ■ Using the File System Listing 3-4. js ... js .. js contents: Ch01 contents: Ch02 contents: Ch03 realpath async: /home/cgack/Dropbox/book/code How It Works Now you examine how all of this works. You see that, in general, the difference between calling on a static, hard-coded directory and allowing a command-line argument to be passed into your command is the added benefit of flexibility. Let’s start with the code that reads the directory information, and then you can examine the differences in implementation.

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