Self-hosting for beginners
This document is aimed at people who are complete beginners to web programming and describes at high level how the different parts of a web application combine to serve PlayCanvas applications, or other web pages to a user's browser.
The Web Stack
In general you can separate a web application into 3 parts: Server-side, Client-side and Static content. In almost all cases you will have all three of these parts for your web application, though sometimes one or several parts will be either very simple or handled by another service.
When a user opens a link in their web browser the browser sends a request to a server somewhere on the internet asking for an HTML page. At its simplest this is a page of text that sits on a hard disk on the web server and is set back over the internet to the browser.
For web pages which are documents for displaying text or images this works very well. But in order to provide a level of interactivity often a server will do some processing after receiving the request and then render a page of HTML including the results of that processing.
For example, in PHP you could show the current date and time, inside your page.
<html> <head> <title>My Homepage</title> </head> <body> <h1>The date is</h1> <?php echo date(DATE_RFC2822); ?> <p>Have a nice day</p> </body> </html>
This PHP code creates an HTML page like below and send it to the browser to display.
<html> <head> <title>My Homepage</title> </head> <body> <h1>The date is</h1> Mon, 11 Apr 2016 06:54:14 -0400 <p>Have a nice day</p> </body> </html>
There are many, many different languages and frameworks to choose from when writing server-side code. PHP, Python, Nodejs, Ruby are all popular choices. But ultimately they have the same outcome, they receive a request for an HTML page, they do some processing and then they return the HTML data.
When writing PlayCanvas applications, no code you write in PlayCanvas runs server-side and we don't provide any server-side code for your projects.
var title = document.getElementById("title"); title.innerHTML = "This is the new title";
Some parts of your web application are not dynamic and do not need to change. For example, images, audio files, text files and in the case of PlayCanvas applications 3D models and textures. You can think of this a bit like loading files of a local disk, except that of course it comes over the internet so it's a bit slower. Serving static content is done by a web server, very much like server-side code and in some cases it will be the same machine. As there is no interactivity, there is no processing done to fulfill the request. The web server just sends back the requested file.
The important thing about static content is making sure it downloads to the client as fast as possible.
Hosting PlayCanvas Applications
We have designed the PlayCanvas hosting to be optimized for serving your PlayCanvas applications to end users throughout the world as quickly as possible. This is why the easiest way to deploy a PlayCanvas application is by clicking the publish button and sending out the
playcanv.as URL. However, in some cases you may be required to host your own application.
Self-hosting PlayCanvas Applications
We have a more detailed page about self-hosting a PlayCanvas application. But in summary, to self-host you need to provide the three parts of the web stack described above.
For a standard PlayCanvas application there is no server-side code required. However, you will still need to supply a web-server because you need to serve the static content including the
index.html file that is found in your downloaded application. It is this file that the browser will request to load your application. There are two common web server application for Linux: Apache and Nginx and one common web server for Windows: IIS.
As described in Server you will be serving all your PlayCanvas content including the
index.html file from your web server as static content.
To get good performance when serving the static content it is critical to enable gzip compression and set the correct cache headers for the content. See your web server documentation for how to enable compression and caching headers on static content.
The client-side code is everything you have written as part of your PlayCanvas application. When the browser loads the index.html file it will start your PlayCanvas application and run all the client-side code that you have written.