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Copy pathhttp_resource.h
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272 lines (238 loc) · 7.78 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.h> 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>
#include <vector>
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 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 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 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 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 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 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 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 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 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 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 (method_state.count(method))
{
method_state[method] = allowed;
}
}
/**
* Method used to implicitly allow all methods
**/
void allow_all()
{
std::map<std::string, bool>::iterator it;
for (it = method_state.begin(); it != method_state.end(); ++it)
{
method_state[(*it).first] = true;
}
}
/**
* Method used to implicitly disallow all methods
**/
void disallow_all()
{
std::map<std::string, bool>::iterator it;
for (it = method_state.begin(); it != method_state.end(); ++it)
{
method_state[(*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 (method_state.count(method))
{
return method_state[method];
}
else
{
#ifdef DEBUG
std::map<std::string, bool>::iterator it;
for (it = method_state.begin(); it != method_state.end(); ++it)
{
std::cout << (*it).first << " -> " << (*it).second << std::endl;
}
#endif // DEBUG
return false;
}
}
/**
* Method used to return a list of currently allowed HTTP methods for this resource
* @return vector of strings
**/
std::vector<std::string> get_allowed_methods()
{
std::vector<std::string> allowed_methods;
for (auto it = method_state.cbegin(); it != method_state.cend(); ++it)
{
if ((*it).second)
{
allowed_methods.push_back((*it).first);
}
}
return allowed_methods;
}
protected:
/**
* Constructor of the class
**/
http_resource()
{
resource_init(&method_state);
}
/**
* 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> method_state;
};
} // namespace httpserver
#endif // SRC_HTTPSERVER_HTTP_RESOURCE_HPP_