Distribued Computing - Computer Science homework help
I need this task to be done within next 48 hoursIMPLEMENT COMMUNICATION VIA HTTP PURPOSE OF ASSIGNMENT We will continue working on our payment processing system described in the week 2 assignment.  In week 4 we will cover communication between components of a distributed system. One of the great difficulties in communication is speaking the same language and even the same dialect of a given language. One of the easiest communication languages to use is the ubiquitous HyperText Transfer Protocol (HTTP) originally intended for communicating between a web browser and a web server. At its heart, this is nothing more than a list of key-value pairs.  PAYMENT PROCESSING SYSTEM DESCRIPTION Have you ever stopped to consider what happens when you’re shopping online? In between entering your credit card information and the money getting charged to your account is a very complex set of interactions. During this class, we will explore a simplified payment processing system that does exactly this. We’ll create a design for it and provide sample implementations for some of the components.  Let’s take a look at some of the details of a payment processing system.  FORMS OF PAYMENT To keep this simple we’ll assume that we only accept credit cards for payment. FRONTEND The happy shopper needs some way to enter their payment details. ONLINE STORE The storefront needs an interface to the processing system where they can enter the shoppers’ details, get confirmation that they can charge the card, and collect the money afterwards. CREDIT CARD PAYMENTS Paying by credit card, whether online or in a physical shop, follows a two-step process.  When your card is first run, it performs an “authorization”. This authorization takes the credit card details and the amount requested and sends them to the credit card company. The company then looks up the card and verifies whether or not the payment will succeed. A status code (OK or some kind of error code) is returned, along with an authorization code if the status is OK.  Later on (e.g. once an hour, once a day) all of these authorizations are collected up into a single batch and sent as “payment requests” to the credit card company. A payment request contains the same information as the initial authorization along with the authorization code that was returned. The credit card company will respond with statuses for each payment request and all the money for those requests that succeeded is transferred into the store’s bank account. PAYMENT PROCESSING SYSTEM The system needs to implement credit card processing as described above.  CREDIT CARD COMPANY We shall assume we use a single credit card processor and that processor provides us with an interface for performing authorizations in real time and batch payment requests. ASSIGNMENT INSTRUCTIONS IMPLEMENT COMMUNICATION VIA HTTP For this assignment, you will write a short (1,000 - 2,000 words) paper on using HTTP to communicate between two servers and provide a small example by implementing a simple client and serve
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