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//
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// BLIPRequest.h
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// MYNetwork
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//
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// Created by Jens Alfke on 5/22/08.
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// Copyright 2008 Jens Alfke. All rights reserved.
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//
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#import "BLIPMessage.h"
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@class BLIPResponse, MYTarget;
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/** A Request, or initiating message, in the <a href=".#blipdesc">BLIP</a> protocol. */
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@interface BLIPRequest : BLIPMessage
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{
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@private
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BLIPResponse *_response;
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}
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/** Creates an outgoing request.
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The body may be nil.
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The request is not associated with any BLIPConnection yet, so you must either set its
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connection property before calling -send, or pass the request as a parameter to
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-[BLIPConnection sendRequest:]. */
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+ (BLIPRequest*) requestWithBody: (NSData*)body;
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/** Creates an outgoing request.
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The body or properties may be nil.
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The request is not associated with any BLIPConnection yet, so you must either set its
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connection property before calling -send, or pass the request as a parameter to
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-[BLIPConnection sendRequest:]. */
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+ (BLIPRequest*) requestWithBody: (NSData*)body
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properties: (NSDictionary*)properties;
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/** BLIPRequest extends the -connection property to be settable.
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This allows a request to be created without a connection (i.e. before the connection is created).
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It can later be sent by setting the connection property and calling -send. */
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@property (retain) BLIPConnection *connection;
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/** Sends this request over its connection.
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(Actually, the connection queues it to be sent; this method always returns immediately.)
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Its matching response object will be returned, or nil if the request couldn't be sent.
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If this request has not been assigned to a connection, an exception will be raised. */
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- (BLIPResponse*) send;
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/** Does this request not need a response?
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This property can only be set before sending the request. */
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@property BOOL noReply;
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/** Returns YES if you've replied to this request (by accessing its -response property.) */
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@property (readonly) BOOL repliedTo;
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/** The request's response. This can be accessed at any time, even before sending the request,
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but the contents of the response won't be filled in until it arrives, of course. */
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@property (readonly) BLIPResponse *response;
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/** Call this when a request arrives, to indicate that you want to respond to it later.
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It will prevent a default empty response from being sent upon return from the request handler. */
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- (void) deferResponse;
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/** Shortcut to respond to this request with the given data.
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The contentType, if not nil, is stored in the "Content-Type" property. */
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- (void) respondWithData: (NSData*)data contentType: (NSString*)contentType;
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/** Shortcut to respond to this request with the given string (which will be encoded in UTF-8). */
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- (void) respondWithString: (NSString*)string;
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/** Shortcut to respond to this request with an error. */
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- (void) respondWithError: (NSError*)error;
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/** Shortcut to respond to this request with the given error code and message.
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The BLIPErrorDomain is assumed. */
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- (void) respondWithErrorCode: (int)code message: (NSString*)message; //, ... __attribute__ ((format (__NSString__, 2,3)));;
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/** Shortcut to respond to this message with an error indicating that an exception occurred. */
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- (void) respondWithException: (NSException*)exception;
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@end
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/** A reply to a BLIPRequest, in the <a href=".#blipdesc">BLIP</a> protocol. */
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@interface BLIPResponse : BLIPMessage
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{
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@private
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NSError *_error;
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MYTarget *_onComplete;
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}
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/** Sends this response. */
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- (BOOL) send;
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/** The error returned by the peer, or nil if the response is successful. */
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@property (retain) NSError* error;
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/** Sets a target/action to be called when an incoming response is complete.
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Use this on the response returned from -[BLIPRequest send], to be notified when the response is available. */
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@property (retain) MYTarget *onComplete;
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@end
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