p/request_handler.h at master · UCLA-CS130/p · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
#ifndef request_handler_h
#define request_handler_h

#include "request.h"
#include "log.h"
#include "response.h"
#include "config_parser.h"

#include <map>

class RequestHandler {
public:
	enum Status {
		OK = 0,
		ILLEGAL_CONFIG = 1
	};
	static RequestHandler* CreateByName(const char* type);

	virtual Status Init(const std::string& uri_prefix, const NginxConfig& config) = 0;

	virtual Status HandleRequest(const Request& request, Response* response) = 0;
};

extern std::map<std::string, RequestHandler* (*)(void)>* request_handler_builders;
template<typename T>
class RequestHandlerRegisterer {
public:
	RequestHandlerRegisterer(const std::string& type) {
		if (request_handler_builders == nullptr) {
			request_handler_builders = new std::map<std::string, RequestHandler* (*)(void)>;
		}
		(*request_handler_builders)[type] = RequestHandlerRegisterer::Create;
	}
	static RequestHandler* Create() {
		return new T;
	}
};
#define REGISTER_REQUEST_HANDLER(ClassName) static RequestHandlerRegisterer<ClassName> ClassName##__registerer(#ClassName)

#endif /* request_handler_h */