caddy/caddytest/integration/caddyfile_adapt/error_example.txt

example.com {
	root * /srv

	# Trigger errors for certain paths
	error /private* "Unauthorized" 403
	error /hidden* "Not found" 404

	# Handle the error by serving an HTML page 
	handle_errors {
		rewrite * /{http.error.status_code}.html
		file_server
	}

	file_server
}
----------
{
	"apps": {
		"http": {
			"servers": {
				"srv0": {
					"listen": [
						":443"
					],
					"routes": [
						{
							"match": [
								{
									"host": [
										"example.com"
									]
								}
							],
							"handle": [
								{
									"handler": "subroute",
									"routes": [
										{
											"handle": [
												{
													"handler": "vars",
													"root": "/srv"
												}
											]
										},
										{
											"handle": [
												{
													"error": "Unauthorized",
													"handler": "error",
													"status_code": 403
												}
											],
											"match": [
												{
													"path": [
														"/private*"
													]
												}
											]
										},
										{
											"handle": [
												{
													"error": "Not found",
													"handler": "error",
													"status_code": 404
												}
											],
											"match": [
												{
													"path": [
														"/hidden*"
													]
												}
											]
										},
										{
											"handle": [
												{
													"handler": "file_server",
													"hide": [
														"./Caddyfile"
													]
												}
											]
										}
									]
								}
							],
							"terminal": true
						}
					],
					"errors": {
						"routes": [
							{
								"match": [
									{
										"host": [
											"example.com"
										]
									}
								],
								"handle": [
									{
										"handler": "subroute",
										"routes": [
											{
												"group": "group0",
												"handle": [
													{
														"handler": "rewrite",
														"uri": "/{http.error.status_code}.html"
													}
												]
											},
											{
												"handle": [
													{
														"handler": "file_server",
														"hide": [
															"./Caddyfile"
														]
													}
												]
											}
										]
									}
								],
								"terminal": true
							}
						]
					}
				}
			}
		}
	}
}