basic newgrounds.io network protocol support

.gitignore

@@ -1,2 +1,3 @@
 .import/
 build/
+ngio.ini

autoloads/ngio.gd

@@ -0,0 +1,123 @@
+extends Node
+
+
+const GATEWAY_URI: String = "https://newgrounds.io/gateway_v3.php"
+
+
+var app_id: String = "" # app id on newgrounds
+var aes_key := PoolByteArray([]) # AES-128/Base64 encryption key
+var keys_loaded: bool = false # whether id and key have been loaded from ini file
+
+var http := HTTPRequest.new() # http request node
+var aes := AESContext.new() # aes encryption
+var rng := RandomNumberGenerator.new()
+
+
+var _response: Dictionary = {}
+
+
+func _ready() -> void:
+	# load app id from ngio.ini
+	var ini = ConfigFile.new()
+	var err = ini.load("res://ngio.ini")
+	if err != OK:
+		push_error("Failed to load ngio data. Will not be able to access scoreboards.")
+		return
+	app_id = ini.get_value("ngio", "id", "")
+	if app_id == "":
+		push_error("Failed to load ngio data. Will not be able to access scoreboards.")
+		keys_loaded = false
+	else:
+		keys_loaded = true
+	
+	# attempt to load aes key
+	var key = Marshalls.base64_to_raw(ini.get_value("ngio", "key", ""))
+	if key.size() == 16:
+		aes_key = key
+	
+	# initialize HTTPRequest
+	add_child(http)
+	http.connect("request_completed", self, "_http_request_completed")
+	
+	# initialize rng for encryption
+	rng.randomize()
+
+
+func _test_http() -> void:
+	print(yield(request_execute("Gateway.getDatetime"), "completed"))
+	print(yield(request_execute(["Gateway.getDatetime", "Gateway.getVersion"], {}, "", ["blep", "bleepo"]), "completed"))
+
+
+## requests the provided component be executed, do not call async :/
+# may call with either single or multiple components
+func request_execute(component, parameters = {}, session_id: String = "", echo = null, encrypt: bool = false) -> Dictionary:
+	# build request headers
+	var headers = [
+		"Content-Type: application/x-www-form-urlencoded",
+	]
+	# build execute object
+	var execute
+	if component is Array:
+		execute = []
+		for i in component.size():
+			if component[i] is String:
+				execute.append({
+					component = component[i],
+				})
+				if parameters is Array and parameters[i] is Dictionary:
+					execute[-1].parameters = parameters[i]
+				if echo is Array and echo[i] is String:
+					execute[-1].echo = echo[i]
+	else:
+		execute = {
+			component = component,
+			parameters = parameters,
+		}
+		if echo is String:
+			execute.echo = echo
+	# use encryption if a valid key is available
+	# TODO: implementation messed up in some way. encryption is fine, but
+	#       formatting is wrong in some way that newgrounds can not understand
+#	if encrypt and aes_key.size() == 16:
+	if false:
+		# convert to bytes
+		var data = to_json(execute).to_utf8()
+		# pad to 16 bytes alignment
+		var padding = PoolByteArray([])
+		padding.resize((16 - data.size() % 16) % 16)
+		padding.fill(0)
+		data.append_array(padding)
+		# generate random initialization vector
+		var iv = PoolByteArray([])
+		iv.resize(16)
+		for i in iv.size():
+			iv[i] = rng.randi() % 0xFF
+		# encrypt data
+		aes.start(AESContext.MODE_CBC_ENCRYPT, aes_key, iv)
+		var encrypted = aes.update(data)
+		aes.finish()
+		# compose secure execute object
+		execute = {
+			secure = Marshalls.raw_to_base64(iv + encrypted)
+		}
+	# compose request body
+	var request = {
+		app_id = app_id,
+		session_id = session_id,
+		execute = execute,
+	}
+	var body = "input=" + to_json(request).percent_encode()
+	# make request
+	var err = http.request(GATEWAY_URI, headers, true, HTTPClient.METHOD_POST, body)
+	# yield response
+	yield(http, "request_completed")
+	return _response
+
+## called when the HTTPRequest gets a responce
+func _http_request_completed(result: int, response_code: int, headers: PoolStringArray, body: PoolByteArray) -> void:
+	if response_code == 200:
+		var dict = parse_json(body.get_string_from_utf8())
+		if typeof(dict) == TYPE_DICTIONARY:
+			_response = dict
+			return
+	_response = {success = false}

project.godot

@@ -82,6 +82,7 @@ SceneManager="*res://autoloads/scene_manager.tscn"
 Console="*res://autoloads/console.tscn"
 Fade="*res://autoloads/fade.tscn"
 StainLayer="*res://autoloads/stain_layer.tscn"
+Ngio="*res://autoloads/ngio.gd"
 
 [debug]