How Do I Specify the Root Directory for a Go Web Server's Static Files?

Where Can I Find the Root Directory of a Go Webserver?

The Go net/http package provides a web server but does not have a concept of a filesystem root. It utilizes handlers that map HTTP requests to URLs.

Static File Serving

However, a static file server is available through the http package's FileServer() function. This function takes a root directory parameter, which can be absolute or relative to the current working directory (the folder where you execute your application).

Example (Absolute Path):

http.Handle("/", http.FileServer(http.Dir("/tmp")))

This handles all requests to the root URL ("/") and serves files from the "/tmp" directory.

Example (Relative Path):

http.Handle("/", http.FileServer(http.Dir("./myfiles")))

Here, files are served from the "./myfiles" directory relative to the current working directory.

Stripping Prefixes for Complex Mapping:

You can employ the StripPrefix() function for more advanced routing. For instance:

http.Handle("/tmpfiles/",</p>
<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">http.StripPrefix("/tmpfiles/", http.FileServer(http.Dir("/tmp"))))

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This serves files from "/tmp" but under the URL "/tmpfiles/".

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