June 2016
Beginner to intermediate
376 pages
8h 23m
English
Content preview from Node.js Web Development - Third EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Calling a REST backend service from an Express application
Now that we've seen how to make HTTP client requests, we can look at how to make a REST query inside an Express web application. What that effectively means is to make an HTTP GET request to a backend server, which responds with the Fibonacci number represented by the URL. To do so, we'll refactor the Fibonacci application to make a Fibonacci server that is called from the application. While this is overkill for calculating Fibonacci numbers, it lets us look at the basics of implementing a multi-tier application stack.
Inherently, calling a REST service is an asynchronous operation. That means calling the REST service will involve a function call to initiate the request and a callback function ...
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