Configuration file

The configuration file needs to be a json file. The viper parser supports other formats but they haven't been as tested as the recommended one.

Json example

{
"version": 3,
"name": "My lovely gateway",
"port": 8080,
"timeout": "10s",
"cache_ttl": "3600s",
"host": [
	"http://127.0.0.1:8080",
	"http://127.0.0.2:8000",
	"http://127.0.0.3:9000",
	"http://127.0.0.4"
],
"endpoints": [{
		"endpoint": "/users/{user}",
		"method": "GET",
		"backend": [{
				"host": [
					"http://127.0.0.3:9000",
					"http://127.0.0.4"
				],
				"url_pattern": "/registered/{user}",
				"allow": [
					"some",
					"what"
				],
				"mapping": {
					"email": "personal_email"
				}
			},
			{
				"host": [
					"http://127.0.0.1:8080"
				],
				"url_pattern": "/users/{user}/permissions",
				"deny": [
					"spam2",
					"notwanted2"
				]
			}
		],
		"concurrent_calls": 2,
		"timeout": "1000s",
		"cache_ttl": 3600,
		"input_query_strings": [
			"page",
			"limit"
		]
	},
	{
		"endpoint": "/foo/bar",
		"method": "POST",
		"backend": [{
			"host": [
				"https://127.0.0.1:8081"
			],
			"url_pattern": "/__debug/tupu"
		}],
		"concurrent_calls": 1,
		"timeout": "1000s",
		"cache_ttl": 3600
	},
	{
		"endpoint": "/github",
		"method": "GET",
		"backend": [{
			"host": [
				"https://api.github.com"
			],
			"url_pattern": "/",
			"allow": [
				"authorizations_url",
				"code_search_url"
			]
		}],
		"concurrent_calls": 2,
		"timeout": "1000s",
		"cache_ttl": 3600
	},
	{
		"endpoint": "/combination/{id}/{supu}",
		"method": "GET",
		"backend": [{
				"group": "first_post",
				"host": [
					"https://jsonplaceholder.typicode.com"
				],
				"url_pattern": "/posts/{id}?supu={supu}",
				"deny": [
					"userId"
				]
			},
			{
				"host": [
					"https://jsonplaceholder.typicode.com"
				],
				"url_pattern": "/users/{id}",
				"mapping": {
					"email": "personal_email"
				}
			}
		],
		"concurrent_calls": 3,
		"timeout": "1000s",
		"input_query_strings": [
			"page",
			"limit"
		]
	}
]}