Implement basic Belfius mobile site API client

.gitignore

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+.dub
+docs.json
+__dummy.html
+*.o
+*.obj
+__test__*__
+belfius-balance

dub.json

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+{
+	"authors": [
+		"Les De Ridder"
+	],
+	"name": "belfius-balance",
+	"license": "NCSA",
+	"copyright": "Copyright © 2017, Les De Ridder",
+	"dependencies": {
+		"vibe-d": "~>0.7.28"
+	},
+	"versions": [
+		"VibeDefaultMain"
+	]
+}

dub.selections.json

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+{
+	"fileVersion": 1,
+	"versions": {
+		"diet-ng": "1.1.3",
+		"libasync": "0.7.9",
+		"libevent": "2.0.2+2.0.16",
+		"memutils": "0.4.9",
+		"openssl": "1.1.5+1.0.1g",
+		"vibe-d": "0.7.30"
+	}
+}

source/app.d

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+import std.stdio;
+
+import vibe.d;
+import vibe.data.json;
+import vibe.textfilter.urlencode;
+
+void helloWorld(HTTPServerRequest req,
+        HTTPServerResponse res)
+{
+    res.writeBody("Hello");
+}
+
+
+class ApiRequest
+{
+}
+
+class OpenSession : ApiRequest
+{
+	string applicationType;
+	string locale;
+	string[string] attributes;
+
+	this(string applicationType, string locale, string[string] attributes)
+	{
+		this.applicationType = applicationType;
+		this.locale = locale;
+		this.attributes = attributes;
+	}
+}
+
+class ApiMessage
+{
+	string executionMode;
+	string protocolVersion;
+	Json[string][] requests;
+
+	this(string executionMode)
+	{
+		this.executionMode = executionMode;
+		this.protocolVersion = "2.1";
+
+		Json[string] requestArray;
+		this.requests = [requestArray];
+	}
+
+	void addRequest(T : ApiRequest)(string name, T request)
+	{
+		requests[0][name] = request.serializeToJson;
+	}
+}
+
+class ApiClient
+{
+	enum string Endpoint = "https://m.belfius.be/F2CRenderingDexiaToClient/GEPARendering/machineIdentifier=s0/";
+
+	private string _locale;
+
+	this(string locale)
+	{
+		_locale = locale;
+	}
+
+	void connect()
+	{
+		auto openSessionRequest = new OpenSession("yui3a", _locale, ["application": "Container", "P": "P055"]);
+
+		auto response = sendRequest("sequential", openSessionRequest);
+
+		writeln(response);
+	}
+
+	Json sendRequest(T : ApiRequest)(string executionMode, T request)
+	{
+		auto message = new ApiMessage(executionMode);
+		message.addRequest(T.stringof, request);
+
+		auto response = requestHTTP(Endpoint,
+			(scope request) {
+				request.method = HTTPMethod.POST;
+				request.headers["Accept"] = "*/*";
+				request.headers["Content-Type"] = "application/x-www-form-urlencoded";
+				request.headers["User-Agent"] = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36";
+				request.writeBody(cast(ubyte[])("request=" ~ message.serializeToJsonString.urlEncode));
+			}
+		).bodyReader.readAllUTF8;
+
+		return response.parseJsonString;
+	}
+}
+
+shared static this()
+{
+    auto router = new URLRouter;
+    router.get("/hello", &helloWorld);
+
+    auto settings = new HTTPServerSettings;
+    settings.sessionStore = new MemorySessionStore;
+    settings.port = 8080;
+	settings.bindAddresses = ["::1", "127.0.0.1"];
+
+    listenHTTP(settings, router);
+
+	auto apiClient = new ApiClient("nl_BE");
+	apiClient.connect();
+}