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Download Clojure Web Development Essentials by Ryan Baldwin PDF

By Ryan Baldwin

If you've got already labored with Clojure and enjoyed its concise syntax, and need to begin constructing net apps with it, then this ebook is for you. This e-book is a beacon of sunshine, the powerful sign to noise ratio that may get you up and operating. It s most sensible in case you have at the very least just a little of expertise constructing net apps, in order that your brain is round the statelessness of all of it. You ll additionally are looking to have a bit event with Leiningen, the preferred Clojure construct instrument.

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Start the Ring Server if it's not already started. 4. Navigate to http://localhost:3000/req. It's possible that your Ring Server will be serving off a port other than 3000. Check the output on lein ring server for the serving port if you're unable to connect to the URL listed in step 4. You should see something like this: [ 44 ] Chapter 4 Using defroutes Before we dive too much into the anatomy of the routes, we should speak briefly about what defroutes is. The defroutes macro packages up all of the routes and creates one big Ring handler out of them.

4. Navigate to http://localhost:3000/req. It's possible that your Ring Server will be serving off a port other than 3000. Check the output on lein ring server for the serving port if you're unable to connect to the URL listed in step 4. You should see something like this: [ 44 ] Chapter 4 Using defroutes Before we dive too much into the anatomy of the routes, we should speak briefly about what defroutes is. The defroutes macro packages up all of the routes and creates one big Ring handler out of them.

Our goal is to understand the server-side/Clojure components and get up and running as quickly as possible. As a result, our templates are going to look pretty basic, if not downright embarrassing. What is Compojure? Compojure is a small, simple library that allows us to create specific request handlers for specific URLs and HTTP methods. In other words, "HTTP Method A requesting URL B will execute Clojure function C". By allowing us to do this, we can create our application in a sane way (URL-driven), and thus architect our code in some meaningful way.

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