/*
* Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#import "OFObject.h"
#ifndef OF_HAVE_SOCKETS
# error No sockets available!
#endif
OF_ASSUME_NONNULL_BEGIN
@class OFDictionary OF_GENERIC(KeyType, ObjectType);
@class OFHTTPClient;
@class OFHTTPRequest;
@class OFHTTPResponse;
@class OFStream;
@class OFTCPSocket;
@class OFURL;
/**
* @protocol OFHTTPClientDelegate OFHTTPClient.h ObjFW/OFHTTPClient.h
*
* @brief A delegate for OFHTTPClient.
*/
@protocol OFHTTPClientDelegate <OFObject>
/**
* @brief A callback which is called when an OFHTTPClient performed a request.
*
* @param client The OFHTTPClient which performed the request
* @param request The request the OFHTTPClient performed
* @param response The response to the request performed, or nil on error
* @param exception An exception if the request failed, or nil on success
*/
- (void)client: (OFHTTPClient *)client
didPerformRequest: (OFHTTPRequest *)request
response: (nullable OFHTTPResponse *)response
exception: (nullable id)exception;
@optional
/**
* @brief A callback which is called when an OFHTTPClient creates a socket.
*
* This is useful if the connection is using HTTPS and the server requires a
* client certificate. This callback can then be used to tell the TLS socket
* about the certificate. Another use case is to tell the socket about a SOCKS5
* proxy it should use for this connection.
*
* @param client The OFHTTPClient that created a socket
* @param socket The socket created by the OFHTTPClient
* @param request The request for which the socket was created
*/
- (void)client: (OFHTTPClient *)client
didCreateSocket: (OFTCPSocket *)socket
request: (OFHTTPRequest *)request;
/**
* @brief A callback which is called when an OFHTTPClient wants to send the
* body for a request.
*
* @param client The OFHTTPClient that wants to send the body
* @param requestBody A stream into which the body of the request should be
* written
* @param request The request for which the OFHTTPClient wants to send the body
*/
- (void)client: (OFHTTPClient *)client
wantsRequestBody: (OFStream *)requestBody
request: (OFHTTPRequest *)request;
/**
* @brief A callback which is called when an OFHTTPClient received headers.
*
* @param client The OFHTTPClient which received the headers
* @param headers The headers received
* @param statusCode The status code received
* @param request The request for which the headers and status code have been
* received
*/
- (void)client: (OFHTTPClient *)client
didReceiveHeaders: (OFDictionary OF_GENERIC(OFString *, OFString *) *)headers
statusCode: (short)statusCode
request: (OFHTTPRequest *)request;
/**
* @brief A callback which is called when an OFHTTPClient wants to follow a
* redirect.
*
* If you want to get the headers and data for each redirect, set the number of
* redirects to 0 and perform a new OFHTTPClient for each redirect. However,
* this callback will not be called then and you have to look at the status code
* to detect a redirect.
*
* This callback will only be called if the OFHTTPClient will follow a
* redirect. If the maximum number of redirects has been reached already, this
* callback will not be called.
*
* @param client The OFHTTPClient which wants to follow a redirect
* @param URL The URL to which it will follow a redirect
* @param statusCode The status code for the redirection
* @param request The request for which the OFHTTPClient wants to redirect.
* You are allowed to change the request's headers from this
* callback and they will be used when following the redirect
* (e.g. to set the cookies for the new URL), however, keep in
* mind that this will change the request you originally passed.
* @param response The response indicating the redirect
* @return A boolean whether the OFHTTPClient should follow the redirect
*/
- (bool)client: (OFHTTPClient *)client
shouldFollowRedirect: (OFURL *)URL
statusCode: (short)statusCode
request: (OFHTTPRequest *)request
response: (OFHTTPResponse *)response;
@end
/**
* @class OFHTTPClient OFHTTPClient.h ObjFW/OFHTTPClient.h
*
* @brief A class for performing HTTP requests.
*/
OF_SUBCLASSING_RESTRICTED
@interface OFHTTPClient: OFObject
{
#ifdef OF_HTTPCLIENT_M
@public
#endif
OFObject <OFHTTPClientDelegate> *_Nullable _delegate;
bool _allowsInsecureRedirects, _inProgress;
OFTCPSocket *_Nullable _socket;
OFURL *_Nullable _lastURL;
bool _lastWasHEAD;
OFHTTPResponse *_Nullable _lastResponse;
}
/**
* @brief The delegate of the HTTP request.
*/
@property OF_NULLABLE_PROPERTY (assign, nonatomic)
OFObject <OFHTTPClientDelegate> *delegate;
/**
* @brief Whether the HTTP client allows redirects from HTTPS to HTTP.
*/
@property (nonatomic) bool allowsInsecureRedirects;
/**
* @brief Creates a new OFHTTPClient.
*
* @return A new, autoreleased OFHTTPClient
*/
+ (instancetype)client;
/**
* @brief Synchronously performs the specified HTTP request.
*
* @note You must not change the delegate while a synchronous request is
* running! If you want to change the delegate during the request,
* perform an asynchronous request instead!
*
* @param request The request to perform
* @return The OFHTTPResponse for the request
*/
- (OFHTTPResponse *)performRequest: (OFHTTPRequest *)request;
/**
* @brief Synchronously performs the specified HTTP request.
*
* @note You must not change the delegate while a synchronous request is
* running! If you want to change the delegate during the request,
* perform an asynchronous request instead!
*
* @param request The request to perform
* @param redirects The maximum number of redirects after which no further
* attempt is done to follow the redirect, but instead the
* redirect is treated as an OFHTTPResponse
* @return The OFHTTPResponse for the request
*/
- (OFHTTPResponse *)performRequest: (OFHTTPRequest *)request
redirects: (unsigned int)redirects;
/**
* @brief Asynchronously performs the specified HTTP request.
*
* @param request The request to perform
*/
- (void)asyncPerformRequest: (OFHTTPRequest *)request;
/**
* @brief Asynchronously performs the specified HTTP request.
*
* @param request The request to perform
* @param redirects The maximum number of redirects after which no further
* attempt is done to follow the redirect, but instead the
* redirect is treated as an OFHTTPResponse
*/
- (void)asyncPerformRequest: (OFHTTPRequest *)request
redirects: (unsigned int)redirects;
/**
* @brief Closes connections that are still open due to keep-alive.
*/
- (void)close;
@end
OF_ASSUME_NONNULL_END