added abstraction for html parsing and response handling

includes/request_parser.hpp

@@ -0,0 +1,23 @@
+#ifndef REQUEST_PARSER_HPP
+#define REQUEST_PARSER_HPP
+
+#include <istream>
+#include <map>
+#include <string>
+
+using namespace std;
+
+struct HttpRequest {
+    string method;
+    string uri;
+    string version;
+    map<string, string> headers;
+    string body;
+};
+
+class request_parser {
+public:
+    HttpRequest& parse(istream& data_stream);
+};
+
+#endif