:80

@matcher path /something*
request_header @matcher Denis "Ritchie"

request_header +Edsger "Dijkstra"
request_header -Wolfram

@images path /images/*
request_header @images Cache-Control "public, max-age=3600, stale-while-revalidate=86400"
----------
{
	"apps": {
		"http": {
			"servers": {
				"srv0": {
					"listen": [
						":80"
					],
					"routes": [
						{
							"match": [
								{
									"path": [
										"/something*"
									]
								}
							],
							"handle": [
								{
									"handler": "headers",
									"request": {
										"set": {
											"Denis": [
												"Ritchie"
											]
										}
									}
								}
							]
						},
						{
							"match": [
								{
									"path": [
										"/images/*"
									]
								}
							],
							"handle": [
								{
									"handler": "headers",
									"request": {
										"set": {
											"Cache-Control": [
												"public, max-age=3600, stale-while-revalidate=86400"
											]
										}
									}
								}
							]
						},
						{
							"handle": [
								{
									"handler": "headers",
									"request": {
										"add": {
											"Edsger": [
												"Dijkstra"
											]
										}
									}
								},
								{
									"handler": "headers",
									"request": {
										"delete": [
											"Wolfram"
										]
									}
								}
							]
						}
					]
				}
			}
		}
	}
}