finally added session-based authentication and libcurl for https requests. (serverside for right now.)

Minecraft.World/HttpClient.cpp

@@ -0,0 +1,57 @@
+#include "stdafx.h"
+#include "HttpClient.h"
+#include <curl/curl.h>
+
+static size_t writeCallback(char *data, size_t size, size_t nmemb, void *userdata)
+{
+	auto *buf = static_cast<std::string *>(userdata);
+	buf->append(data, size * nmemb);
+	return size * nmemb;
+}
+
+static HttpResponse performRequest(CURL *curl)
+{
+	std::string responseBody;
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCallback);
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &responseBody);
+	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 10L);
+	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
+
+	CURLcode res = curl_easy_perform(curl);
+
+	int statusCode = 0;
+	if (res == CURLE_OK)
+		curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &statusCode);
+
+	curl_easy_cleanup(curl);
+	return {statusCode, std::move(responseBody)};
+}
+
+HttpResponse HttpClient::get(const std::string &url)
+{
+	CURL *curl = curl_easy_init();
+	if (!curl)
+		return {0, ""};
+
+	curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+	return performRequest(curl);
+}
+
+HttpResponse HttpClient::post(const std::string &url, const std::string &body, const std::string &contentType)
+{
+	CURL *curl = curl_easy_init();
+	if (!curl)
+		return {0, ""};
+
+	curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+	curl_easy_setopt(curl, CURLOPT_POSTFIELDS, body.c_str());
+	curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, static_cast<long>(body.size()));
+
+	struct curl_slist *headers = nullptr;
+	headers = curl_slist_append(headers, ("Content-Type: " + contentType).c_str());
+	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
+
+	HttpResponse resp = performRequest(curl);
+	curl_slist_free_all(headers);
+	return resp;
+}