add http_client library, using libcurl

take out common http entities to http_common dir

libs/main/http_server/microhttpd_server.h

@@ -1,7 +1,7 @@
 #ifndef MICROHTTPD_SERVER_P_H
 #define MICROHTTPD_SERVER_P_H
 
-#include "pibase.h"
+#include "pihttptypes.h"
 #include "piobject.h"
 #include "pip_http_server_export.h"
 
@@ -15,18 +15,6 @@ public:
 	MicrohttpdServer();
 	virtual ~MicrohttpdServer();
 
-	enum class Method {
-		Unknown,
-		Get,
-		Head,
-		Post,
-		Put,
-		Delete,
-		Connect,
-		Options,
-		Trace,
-		Patch
-	};
 	enum class Option {
 		ConnectionLimit,   // uint
 		ConnectionTimeout, // uint, sec
@@ -36,30 +24,6 @@ public:
 		HTTPSKeyPassword   // const char * to passwd for key.pem
 	};
 
-	struct PIP_HTTP_SERVER_EXPORT Request {
-		MicrohttpdServer::Method method;
-		PIString path;
-		PIByteArray body;
-		PIMap<PIString, PIString> headers;
-		PIMap<PIString, PIString> args;
-	};
-
-	class PIP_HTTP_SERVER_EXPORT Reply {
-		friend struct MicrohttpdServerConnection;
-
-	public:
-		void addHeader(const PIString & header, const PIString & value);
-		void removeHeader(const PIString & header);
-		void setBody(const PIByteArray & b);
-		void setCode(int c);
-
-	private:
-		void addFixedHeaders();
-		int code = 200;
-		PIByteArray body;
-		PIMap<PIString, PIString> headers;
-	};
-
 	void setOption(Option o, PIVariant v);
 	void setFavicon(const PIByteArray & im);
 
@@ -68,14 +32,15 @@ public:
 	bool isListen() const;
 	void stop();
 
-	void setRequestCallback(std::function<Reply(Request)> c) { callback = c; }
+	void setRequestCallback(std::function<PIHTTP::MessageMutable(const PIHTTP::MessageConst &)> c) { callback = c; }
 
 private:
+	static void addFixedHeaders(PIHTTP::MessageMutable & msg);
 	PRIVATE_DECLARATION(PIP_HTTP_SERVER_EXPORT)
 
 	PIByteArray favicon;
 	PIMap<Option, PIVariant> opts;
-	std::function<Reply(Request)> callback;
+	std::function<PIHTTP::MessageMutable(const PIHTTP::MessageConst &)> callback;
 	PIByteArray mem_key, mem_cert, key_pass;
 };