• Caddyfile@caddy-markdown-site

The code you provided is a Caddyfile configuration for using the caddy-markdown-site plugin. This plugin allows you to serve Markdown files as static websites using Caddy. Let's go through the configuration and understand what each section does:

# https://github.com/dbohdan/caddy-markdown-site
# Copyright (c) 2021 D. Bohdan.  License: MIT.

http://localhost:8080 {
    # The root * demo directive sets the root directory for serving files as 
    # the demo directory relative to the location of the Caddyfile.
	root * demo

	# The encode gzip directive enables gzip compression for the served content 
    # to optimize the transfer size.
    encode gzip

	# The file_server directive enables Caddy's built-in file server, 
    # which serves static files from the configured root directory.
    file_server
	
    # The templates directive enables template rendering for dynamic content generation.
    templates

	@media {
		path /favicon.ico
		path /media/*
	}
	@templates {
		path /templates/*
		not path /templates/*.css /templates/*.js
	}
	@markdown {
		path_regexp \.md$
	}
	@markdown_exists {
		file {path}.md
	}

	handle @media {
		file_server
	}
	handle @templates {
		error 403
	}
	handle @markdown {
		rewrite * /templates/index.html
	}
	handle @markdown_exists {
		map {path} {caddy_markdown_site.append_to_path} {
			default extension
		}
		rewrite * /templates/index.html
	}

	handle_errors {
		file_server
		templates

		@markdown_index_exists_404 {
			file {path}/index.md
			expression `{http.error.status_code} == 404`
		}

		handle @markdown_index_exists_404 {
			map {path} {caddy_markdown_site.append_to_path} {
				default index
			}
			file_server {
				status 200
			}
			rewrite * /templates/index.html
		}
		handle {
			rewrite * /templates/error.html
		}
	}
}

The @media matcher set is defined to match requests for /favicon.ico and /media/* paths.

The @templates matcher set is defined to match requests for /templates/* paths except for .css and .js files.

The @markdown matcher set is defined to match requests for paths ending with .md.

The @markdown_exists matcher set checks if the requested file exists with a .md extension.

The handle @media block serves the matched requests for media files using the file server.

The handle @templates block returns a 403 Forbidden error for requests matching the @templates matcher set.

The handle @markdown block rewrites all requests matching the @markdown matcher set to /templates/index.html. This is done to handle Markdown files and render them using templates.

The handle @markdown_exists block maps the requested path to a new path with the caddy_markdown_site.append_to_path appended. This is used for adding an extension to the path if the requested file with a .md extension exists.

The handle_errors block is used to handle errors and serve error pages.

The handle @markdown_index_exists_404 block checks if the requested path has an index.md file and if the HTTP error status code is 404. If both conditions are met, it maps the path and serves the index.md file, rewriting to /templates/index.html.

The final handle block handles all other errors and rewrites requests to /templates/error.html.

In summary, this configuration sets up Caddy to serve static files, handle Markdown files, and use templates for rendering dynamic content. It includes special handling for media files, templates, Markdown files, and error pages.

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