Content-Type Negotiation

Some files will be served correctly if you do not include an extension. Rather than typing:

<img src="/thumb.png">

You can just type:

<img src="/thumb">

This is helpful when you don't know which extension the site may use. In the case of images, it might be .png, .jpg, .jpeg, or .gif. By not including the extension, you will fetch whichever format they use.

The behaviors are:

• text/html. Will match .html and .md.
• text/css. Will match .css.
• image/*. Will match .png, .jpg, .jpeg, and .gif.