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zdoom-macos-deps/deps/sfml/include/SFML/Network/Http.hpp
alexey.lysiuk 52accce6bd add sfml 2.5.1
2021-06-23 10:16:33 +03:00

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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2018 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#ifndef SFML_HTTP_HPP
#define SFML_HTTP_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Network/Export.hpp>
#include <SFML/Network/IpAddress.hpp>
#include <SFML/Network/TcpSocket.hpp>
#include <SFML/System/NonCopyable.hpp>
#include <SFML/System/Time.hpp>
#include <map>
#include <string>
namespace sf
{
////////////////////////////////////////////////////////////
/// \brief A HTTP client
///
////////////////////////////////////////////////////////////
class SFML_NETWORK_API Http : NonCopyable
{
public:
////////////////////////////////////////////////////////////
/// \brief Define a HTTP request
///
////////////////////////////////////////////////////////////
class SFML_NETWORK_API Request
{
public:
////////////////////////////////////////////////////////////
/// \brief Enumerate the available HTTP methods for a request
///
////////////////////////////////////////////////////////////
enum Method
{
Get, ///< Request in get mode, standard method to retrieve a page
Post, ///< Request in post mode, usually to send data to a page
Head, ///< Request a page's header only
Put, ///< Request in put mode, useful for a REST API
Delete ///< Request in delete mode, useful for a REST API
};
////////////////////////////////////////////////////////////
/// \brief Default constructor
///
/// This constructor creates a GET request, with the root
/// URI ("/") and an empty body.
///
/// \param uri Target URI
/// \param method Method to use for the request
/// \param body Content of the request's body
///
////////////////////////////////////////////////////////////
Request(const std::string& uri = "/", Method method = Get, const std::string& body = "");
////////////////////////////////////////////////////////////
/// \brief Set the value of a field
///
/// The field is created if it doesn't exist. The name of
/// the field is case-insensitive.
/// By default, a request doesn't contain any field (but the
/// mandatory fields are added later by the HTTP client when
/// sending the request).
///
/// \param field Name of the field to set
/// \param value Value of the field
///
////////////////////////////////////////////////////////////
void setField(const std::string& field, const std::string& value);
////////////////////////////////////////////////////////////
/// \brief Set the request method
///
/// See the Method enumeration for a complete list of all
/// the availale methods.
/// The method is Http::Request::Get by default.
///
/// \param method Method to use for the request
///
////////////////////////////////////////////////////////////
void setMethod(Method method);
////////////////////////////////////////////////////////////
/// \brief Set the requested URI
///
/// The URI is the resource (usually a web page or a file)
/// that you want to get or post.
/// The URI is "/" (the root page) by default.
///
/// \param uri URI to request, relative to the host
///
////////////////////////////////////////////////////////////
void setUri(const std::string& uri);
////////////////////////////////////////////////////////////
/// \brief Set the HTTP version for the request
///
/// The HTTP version is 1.0 by default.
///
/// \param major Major HTTP version number
/// \param minor Minor HTTP version number
///
////////////////////////////////////////////////////////////
void setHttpVersion(unsigned int major, unsigned int minor);
////////////////////////////////////////////////////////////
/// \brief Set the body of the request
///
/// The body of a request is optional and only makes sense
/// for POST requests. It is ignored for all other methods.
/// The body is empty by default.
///
/// \param body Content of the body
///
////////////////////////////////////////////////////////////
void setBody(const std::string& body);
private:
friend class Http;
////////////////////////////////////////////////////////////
/// \brief Prepare the final request to send to the server
///
/// This is used internally by Http before sending the
/// request to the web server.
///
/// \return String containing the request, ready to be sent
///
////////////////////////////////////////////////////////////
std::string prepare() const;
////////////////////////////////////////////////////////////
/// \brief Check if the request defines a field
///
/// This function uses case-insensitive comparisons.
///
/// \param field Name of the field to test
///
/// \return True if the field exists, false otherwise
///
////////////////////////////////////////////////////////////
bool hasField(const std::string& field) const;
////////////////////////////////////////////////////////////
// Types
////////////////////////////////////////////////////////////
typedef std::map<std::string, std::string> FieldTable;
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
FieldTable m_fields; ///< Fields of the header associated to their value
Method m_method; ///< Method to use for the request
std::string m_uri; ///< Target URI of the request
unsigned int m_majorVersion; ///< Major HTTP version
unsigned int m_minorVersion; ///< Minor HTTP version
std::string m_body; ///< Body of the request
};
////////////////////////////////////////////////////////////
/// \brief Define a HTTP response
///
////////////////////////////////////////////////////////////
class SFML_NETWORK_API Response
{
public:
////////////////////////////////////////////////////////////
/// \brief Enumerate all the valid status codes for a response
///
////////////////////////////////////////////////////////////
enum Status
{
// 2xx: success
Ok = 200, ///< Most common code returned when operation was successful
Created = 201, ///< The resource has successfully been created
Accepted = 202, ///< The request has been accepted, but will be processed later by the server
NoContent = 204, ///< The server didn't send any data in return
ResetContent = 205, ///< The server informs the client that it should clear the view (form) that caused the request to be sent
PartialContent = 206, ///< The server has sent a part of the resource, as a response to a partial GET request
// 3xx: redirection
MultipleChoices = 300, ///< The requested page can be accessed from several locations
MovedPermanently = 301, ///< The requested page has permanently moved to a new location
MovedTemporarily = 302, ///< The requested page has temporarily moved to a new location
NotModified = 304, ///< For conditional requests, means the requested page hasn't changed and doesn't need to be refreshed
// 4xx: client error
BadRequest = 400, ///< The server couldn't understand the request (syntax error)
Unauthorized = 401, ///< The requested page needs an authentication to be accessed
Forbidden = 403, ///< The requested page cannot be accessed at all, even with authentication
NotFound = 404, ///< The requested page doesn't exist
RangeNotSatisfiable = 407, ///< The server can't satisfy the partial GET request (with a "Range" header field)
// 5xx: server error
InternalServerError = 500, ///< The server encountered an unexpected error
NotImplemented = 501, ///< The server doesn't implement a requested feature
BadGateway = 502, ///< The gateway server has received an error from the source server
ServiceNotAvailable = 503, ///< The server is temporarily unavailable (overloaded, in maintenance, ...)
GatewayTimeout = 504, ///< The gateway server couldn't receive a response from the source server
VersionNotSupported = 505, ///< The server doesn't support the requested HTTP version
// 10xx: SFML custom codes
InvalidResponse = 1000, ///< Response is not a valid HTTP one
ConnectionFailed = 1001 ///< Connection with server failed
};
////////////////////////////////////////////////////////////
/// \brief Default constructor
///
/// Constructs an empty response.
///
////////////////////////////////////////////////////////////
Response();
////////////////////////////////////////////////////////////
/// \brief Get the value of a field
///
/// If the field \a field is not found in the response header,
/// the empty string is returned. This function uses
/// case-insensitive comparisons.
///
/// \param field Name of the field to get
///
/// \return Value of the field, or empty string if not found
///
////////////////////////////////////////////////////////////
const std::string& getField(const std::string& field) const;
////////////////////////////////////////////////////////////
/// \brief Get the response status code
///
/// The status code should be the first thing to be checked
/// after receiving a response, it defines whether it is a
/// success, a failure or anything else (see the Status
/// enumeration).
///
/// \return Status code of the response
///
////////////////////////////////////////////////////////////
Status getStatus() const;
////////////////////////////////////////////////////////////
/// \brief Get the major HTTP version number of the response
///
/// \return Major HTTP version number
///
/// \see getMinorHttpVersion
///
////////////////////////////////////////////////////////////
unsigned int getMajorHttpVersion() const;
////////////////////////////////////////////////////////////
/// \brief Get the minor HTTP version number of the response
///
/// \return Minor HTTP version number
///
/// \see getMajorHttpVersion
///
////////////////////////////////////////////////////////////
unsigned int getMinorHttpVersion() const;
////////////////////////////////////////////////////////////
/// \brief Get the body of the response
///
/// The body of a response may contain:
/// \li the requested page (for GET requests)
/// \li a response from the server (for POST requests)
/// \li nothing (for HEAD requests)
/// \li an error message (in case of an error)
///
/// \return The response body
///
////////////////////////////////////////////////////////////
const std::string& getBody() const;
private:
friend class Http;
////////////////////////////////////////////////////////////
/// \brief Construct the header from a response string
///
/// This function is used by Http to build the response
/// of a request.
///
/// \param data Content of the response to parse
///
////////////////////////////////////////////////////////////
void parse(const std::string& data);
////////////////////////////////////////////////////////////
/// \brief Read values passed in the answer header
///
/// This function is used by Http to extract values passed
/// in the response.
///
/// \param in String stream containing the header values
///
////////////////////////////////////////////////////////////
void parseFields(std::istream &in);
////////////////////////////////////////////////////////////
// Types
////////////////////////////////////////////////////////////
typedef std::map<std::string, std::string> FieldTable;
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
FieldTable m_fields; ///< Fields of the header
Status m_status; ///< Status code
unsigned int m_majorVersion; ///< Major HTTP version
unsigned int m_minorVersion; ///< Minor HTTP version
std::string m_body; ///< Body of the response
};
////////////////////////////////////////////////////////////
/// \brief Default constructor
///
////////////////////////////////////////////////////////////
Http();
////////////////////////////////////////////////////////////
/// \brief Construct the HTTP client with the target host
///
/// This is equivalent to calling setHost(host, port).
/// The port has a default value of 0, which means that the
/// HTTP client will use the right port according to the
/// protocol used (80 for HTTP). You should leave it like
/// this unless you really need a port other than the
/// standard one, or use an unknown protocol.
///
/// \param host Web server to connect to
/// \param port Port to use for connection
///
////////////////////////////////////////////////////////////
Http(const std::string& host, unsigned short port = 0);
////////////////////////////////////////////////////////////
/// \brief Set the target host
///
/// This function just stores the host address and port, it
/// doesn't actually connect to it until you send a request.
/// The port has a default value of 0, which means that the
/// HTTP client will use the right port according to the
/// protocol used (80 for HTTP). You should leave it like
/// this unless you really need a port other than the
/// standard one, or use an unknown protocol.
///
/// \param host Web server to connect to
/// \param port Port to use for connection
///
////////////////////////////////////////////////////////////
void setHost(const std::string& host, unsigned short port = 0);
////////////////////////////////////////////////////////////
/// \brief Send a HTTP request and return the server's response.
///
/// You must have a valid host before sending a request (see setHost).
/// Any missing mandatory header field in the request will be added
/// with an appropriate value.
/// Warning: this function waits for the server's response and may
/// not return instantly; use a thread if you don't want to block your
/// application, or use a timeout to limit the time to wait. A value
/// of Time::Zero means that the client will use the system default timeout
/// (which is usually pretty long).
///
/// \param request Request to send
/// \param timeout Maximum time to wait
///
/// \return Server's response
///
////////////////////////////////////////////////////////////
Response sendRequest(const Request& request, Time timeout = Time::Zero);
private:
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
TcpSocket m_connection; ///< Connection to the host
IpAddress m_host; ///< Web host address
std::string m_hostName; ///< Web host name
unsigned short m_port; ///< Port used for connection with host
};
} // namespace sf
#endif // SFML_HTTP_HPP
////////////////////////////////////////////////////////////
/// \class sf::Http
/// \ingroup network
///
/// sf::Http is a very simple HTTP client that allows you
/// to communicate with a web server. You can retrieve
/// web pages, send data to an interactive resource,
/// download a remote file, etc. The HTTPS protocol is
/// not supported.
///
/// The HTTP client is split into 3 classes:
/// \li sf::Http::Request
/// \li sf::Http::Response
/// \li sf::Http
///
/// sf::Http::Request builds the request that will be
/// sent to the server. A request is made of:
/// \li a method (what you want to do)
/// \li a target URI (usually the name of the web page or file)
/// \li one or more header fields (options that you can pass to the server)
/// \li an optional body (for POST requests)
///
/// sf::Http::Response parse the response from the web server
/// and provides getters to read them. The response contains:
/// \li a status code
/// \li header fields (that may be answers to the ones that you requested)
/// \li a body, which contains the contents of the requested resource
///
/// sf::Http provides a simple function, SendRequest, to send a
/// sf::Http::Request and return the corresponding sf::Http::Response
/// from the server.
///
/// Usage example:
/// \code
/// // Create a new HTTP client
/// sf::Http http;
///
/// // We'll work on http://www.sfml-dev.org
/// http.setHost("http://www.sfml-dev.org");
///
/// // Prepare a request to get the 'features.php' page
/// sf::Http::Request request("features.php");
///
/// // Send the request
/// sf::Http::Response response = http.sendRequest(request);
///
/// // Check the status code and display the result
/// sf::Http::Response::Status status = response.getStatus();
/// if (status == sf::Http::Response::Ok)
/// {
/// std::cout << response.getBody() << std::endl;
/// }
/// else
/// {
/// std::cout << "Error " << status << std::endl;
/// }
/// \endcode
///
////////////////////////////////////////////////////////////
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