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Copy pathhttp_resource.hpp
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219 lines (188 loc) · 6.61 KB
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/*
This file is part of libhttpserver
Copyright (C) 2011-2019 Sebastiano Merlino
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if !defined (_HTTPSERVER_HPP_INSIDE_) && !defined (HTTPSERVER_COMPILATION)
#error "Only <httpserver.hpp> or <httpserverpp> can be included directly."
#endif
#ifndef SRC_HTTPSERVER_HTTP_RESOURCE_HPP_
#define SRC_HTTPSERVER_HTTP_RESOURCE_HPP_
#ifdef DEBUG
#include <iostream>
#endif
#include <map>
#include <memory>
#include <string>
#include <utility>
namespace httpserver { class http_request; }
namespace httpserver { class http_response; }
namespace httpserver {
namespace details { std::shared_ptr<http_response> empty_render(const http_request& r); }
void resource_init(std::map<std::string, bool>* res);
/**
* Class representing a callable http resource.
**/
class http_resource {
public:
/**
* Class destructor
**/
virtual ~http_resource() = default;
/**
* Method used to answer to a generic request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render(const http_request& req) {
return details::empty_render(req);
}
/**
* Method used to answer to a GET request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_GET(const http_request& req) {
return render(req);
}
/**
* Method used to answer to a POST request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_POST(const http_request& req) {
return render(req);
}
/**
* Method used to answer to a PUT request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_PUT(const http_request& req) {
return render(req);
}
/**
* Method used to answer to a HEAD request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_HEAD(const http_request& req) {
return render(req);
}
/**
* Method used to answer to a DELETE request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_DELETE(const http_request& req) {
return render(req);
}
/**
* Method used to answer to a TRACE request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_TRACE(const http_request& req) {
return render(req);
}
/**
* Method used to answer to a OPTIONS request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_OPTIONS(const http_request& req) {
return render(req);
}
/**
* Method used to answer to a PATCH request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_PATCH(const http_request& req) {
return render(req);
}
/**
* Method used to answer to a CONNECT request
* @param req Request passed through http
* @return A http_response object
**/
virtual const std::shared_ptr<http_response> render_CONNECT(const http_request& req) {
return render(req);
}
/**
* Method used to set if a specific method is allowed or not on this request
* @param method method to set permission on
* @param allowed boolean indicating if the method is allowed or not
**/
void set_allowing(const std::string& method, bool allowed) {
if (allowed_methods.count(method)) {
allowed_methods[method] = allowed;
}
}
/**
* Method used to implicitly allow all methods
**/
void allow_all() {
std::map<std::string, bool>::iterator it;
for (it=allowed_methods.begin(); it != allowed_methods.end(); ++it) {
allowed_methods[(*it).first] = true;
}
}
/**
* Method used to implicitly disallow all methods
**/
void disallow_all() {
std::map<std::string, bool>::iterator it;
for (it=allowed_methods.begin(); it != allowed_methods.end(); ++it) {
allowed_methods[(*it).first] = false;
}
}
/**
* Method used to discover if an http method is allowed or not for this resource
* @param method Method to discover allowings
* @return true if the method is allowed
**/
bool is_allowed(const std::string& method) {
if (allowed_methods.count(method)) {
return allowed_methods[method];
} else {
#ifdef DEBUG
std::map<std::string, bool>::iterator it;
for (it = allowed_methods.begin(); it != allowed_methods.end(); ++it) {
std::cout << (*it).first << " -> " << (*it).second << std::endl;
}
#endif // DEBUG
return false;
}
}
protected:
/**
* Constructor of the class
**/
http_resource() {
resource_init(&allowed_methods);
}
/**
* Copy constructor
**/
http_resource(const http_resource& b) = default;
http_resource(http_resource&& b) noexcept = default;
http_resource& operator=(const http_resource& b) = default;
http_resource& operator=(http_resource&& b) = default;
private:
friend class webserver;
friend void resource_init(std::map<std::string, bool>* res);
std::map<std::string, bool> allowed_methods;
};
} // namespace httpserver
#endif // SRC_HTTPSERVER_HTTP_RESOURCE_HPP_