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Setup a localhost Server

Overview

X_ITE makes use of the XMLHttpRequest object to load files and there’s no way round that. But that means files loading using the file:// scheme protocol are subject to the same origin policy and are handled as cross origin requests (CORS) and cross origin requests are only supported for protocol schemes: https, http and data. That means X_ITE cannot have access to this files.

To work around this problem you must set up a localhost server, then you can access your local files under the web address http://localhost/…

Using a Browser Extension

You can use this Browser Extension to unlock the CORS restrictions imposed by your browser. This is useful if you are in development mode and is easy to use.

Using an Application

There are several applications on the Internet which can make a localhost server. Here I would like to recommend you two of them:

MacOS users can use Personal Web Server, which can serves files through a web server, and is very easy to use.

Another application is XAMPP, which runs on several operating systems and is very popular.

Using Python

If you have Python installed, then it is quite easy to start a localhost server.

Just open a Terminal and go to the directory you want to make available.

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# Let's make the Desktop directory available.
$ cd Desktop

Type in the following command to start the server.

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$ python3 -m http.server

By default, this will run the contents of the directory on a local web server, on port 8000. You can go to this server by going to the URL http://localhost:8000 in your web browser. Here you’ll see the contents of the directory listed — click the HTML file you want to run.

Tip: If you already have something running on port 8000, you can choose another port by running the server command followed by an alternative port number, e.g. python3 -m http.server 7800. You can then access your content at http://localhost:7800.

This post is licensed under CC BY 4.0 by the author.