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//
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// BLIPMessage.h
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// MYNetwork
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//
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// Created by Jens Alfke on 5/10/08.
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// Copyright 2008 Jens Alfke. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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@class BLIPConnection, BLIPProperties, BLIPMutableProperties;
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/** NSError domain and codes for BLIP */
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extern NSString* const BLIPErrorDomain;
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enum {
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kBLIPError_BadData = 1,
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kBLIPError_BadFrame,
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kBLIPError_Disconnected,
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kBLIPError_PeerNotAllowed,
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kBLIPError_Misc = 99,
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// errors returned in responses:
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kBLIPError_BadRequest = 400,
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kBLIPError_Forbidden = 403,
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kBLIPError_NotFound = 404,
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kBLIPError_BadRange = 416,
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kBLIPError_HandlerFailed = 501,
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kBLIPError_Unspecified = 599 // peer didn't send any detailed error info
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};
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NSError *BLIPMakeError( int errorCode, NSString *message, ... ) __attribute__ ((format (__NSString__, 2, 3)));
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/** Abstract superclass for <a href=".#blipdesc">BLIP</a> requests and responses. */
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@interface BLIPMessage : NSObject
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{
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@protected
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BLIPConnection *_connection;
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UInt16 _flags;
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UInt32 _number;
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BLIPProperties *_properties;
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NSData *_body;
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NSMutableData *_encodedBody;
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NSMutableData *_mutableBody;
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BOOL _isMine, _isMutable, _sent, _propertiesAvailable, _complete;
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SInt32 _bytesWritten;
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id _representedObject;
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};
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/** The BLIPConnection associated with this message. */
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@property (readonly,retain) BLIPConnection *connection;
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/** This message's serial number in its connection.
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A BLIPRequest's number is initially zero, then assigned when it's sent.
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A BLIPResponse is automatically assigned the same number as the request it replies to. */
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@property (readonly) UInt32 number;
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/** Is this a message sent by me (as opposed to the peer)? */
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@property (readonly) BOOL isMine;
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/** Has this message been sent yet? (Only makes sense when isMe is set.) */
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@property (readonly) BOOL sent;
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/** Has enough of the message arrived to read its properies? */
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@property (readonly) BOOL propertiesAvailable;
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/** Has the entire message, including the body, arrived? */
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@property (readonly) BOOL complete;
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/** Should the message body be compressed with gzip?
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This property can only be set <i>before</i> sending the message. */
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@property BOOL compressed;
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/** Should the message be sent ahead of normal-priority messages?
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This property can only be set <i>before</i> sending the message. */
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@property BOOL urgent;
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/** Can this message be changed? (Only true for outgoing messages, before you send them.) */
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@property (readonly) BOOL isMutable;
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/** The message body, a blob of arbitrary data. */
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@property (copy) NSData *body;
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/** Appends data to the body. */
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- (void) addToBody: (NSData*)data;
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/** The message body as an NSString.
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The UTF-8 character encoding is used to convert. */
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@property (copy) NSString *bodyString;
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/** An arbitrary object that you can associate with this message for your own purposes.
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The message retains it, but doesn't do anything else with it. */
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@property (retain) id representedObject;
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#pragma mark PROPERTIES:
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/** The message's properties, a dictionary-like object.
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Message properties are much like the headers in HTTP, MIME and RFC822. */
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@property (readonly) BLIPProperties* properties;
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/** Mutable version of the message's properties; only available if this mesage is mutable. */
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@property (readonly) BLIPMutableProperties* mutableProperties;
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/** The value of the "Content-Type" property, which is by convention the MIME type of the body. */
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@property (copy) NSString *contentType;
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/** The value of the "Profile" property, which by convention identifies the purpose of the message. */
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@property (copy) NSString *profile;
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/** A shortcut to get the value of a property. */
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- (NSString*) valueOfProperty: (NSString*)property;
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/** A shortcut to set the value of a property. A nil value deletes that property. */
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- (void) setValue: (NSString*)value ofProperty: (NSString*)property;
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/** Similar to -description, but also shows the properties and their values. */
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@property (readonly) NSString* descriptionWithProperties;
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@end
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