mirror of
https://github.com/zhigang1992/FayeObjC.git
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339 lines
10 KiB
Objective-C
339 lines
10 KiB
Objective-C
/* The MIT License
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Copyright (c) 2011 Paul Crawford
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE. */
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//
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// FayeClient.m
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// FayeObjC
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//
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#import "FayeClient.h"
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#import "FayeMessage.h"
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// allows definition of private property
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@interface FayeClient ()
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@property (retain) NSDictionary *connectionExtension;
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@end
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@interface FayeClient (Private)
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- (void) openWebSocketConnection;
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- (void) closeWebSocketConnection;
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- (void) connect;
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- (void) disconnect;
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- (void) handshake;
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- (void) subscribe;
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- (void) publish:(NSDictionary *)messageDict withExt:(NSDictionary *)extension;
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- (void) parseFayeMessage:(NSString *)message;
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@end
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@implementation FayeClient
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@synthesize fayeURLString;
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@synthesize webSocket;
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@synthesize fayeClientId;
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@synthesize webSocketConnected;
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@synthesize activeSubChannel;
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@synthesize delegate;
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@synthesize connectionExtension;
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/*
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Example websocket url string
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// ws://localhost:8000/faye
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*/
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- (id) initWithURLString:(NSString *)aFayeURLString channel:(NSString *)channel
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{
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self = [super init];
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if (self != nil) {
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self.fayeURLString = aFayeURLString;
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self.webSocketConnected = NO;
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fayeConnected = NO;
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self.activeSubChannel = channel;
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}
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return self;
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}
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#pragma mark -
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#pragma mark Faye
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// fire up a connection to the websocket
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// handshake with the server
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// establish a faye connection
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- (void) connectToServer {
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[self openWebSocketConnection];
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}
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- (void) connectToServerWithExt:(NSDictionary *)extension {
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self.connectionExtension = extension;
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[self connectToServer];
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}
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- (void) disconnectFromServer {
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[self disconnect];
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}
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- (void) sendMessage:(NSDictionary *)messageDict {
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[self publish:messageDict withExt:nil];
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}
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- (void) sendMessage:(NSDictionary *)messageDict withExt:(NSDictionary *)extension {
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[self publish:messageDict withExt:extension];
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}
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#pragma mark -
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#pragma mark WebSocket Delegate
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#pragma mark -
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#pragma mark webSocket
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-(void)webSocketDidClose:(ZTWebSocket *)webSocket {
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self.webSocketConnected = NO;
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fayeConnected = NO;
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if(self.delegate != NULL && [self.delegate respondsToSelector:@selector(disconnectedFromServer)]) {
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[self.delegate disconnectedFromServer];
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}
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}
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-(void)webSocket:(ZTWebSocket *)webSocket didFailWithError:(NSError *)error {
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if (error.code == ZTWebSocketErrorConnectionFailed) {
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NSLog(@"Connection failed %@", [error localizedDescription]);
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} else if (error.code == ZTWebSocketErrorHandshakeFailed) {
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NSLog(@"Handshake failed %@", [error localizedDescription]);
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} else {
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NSLog(@"Error %@", [error localizedDescription]);
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}
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}
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-(void)webSocket:(ZTWebSocket *)webSocket didReceiveMessage:(NSString*)message {
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[self parseFayeMessage:message];
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}
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-(void)webSocketDidOpen:(ZTWebSocket *)aWebSocket {
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self.webSocketConnected = YES;
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[self handshake];
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}
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-(void)webSocketDidSendMessage:(ZTWebSocket *)aWebSocket {
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#ifdef DEBUG
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NSLog(@"WEBSOCKET DID SEND MESSAGE");
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#endif
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if(self.delegate != NULL && [self.delegate respondsToSelector:@selector(socketDidSendMessage:)]) {
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[self.delegate socketDidSendMessage:aWebSocket];
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}
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}
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#pragma mark -
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#pragma mark Deallocation
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- (void) dealloc
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{
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self.delegate = nil;
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[webSocket release];
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[fayeURLString release];
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[fayeClientId release];
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[activeSubChannel release];
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[connectionExtension release];
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[super dealloc];
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}
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@end
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#pragma mark -
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#pragma mark Private
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@implementation FayeClient (Private)
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#pragma mark -
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#pragma mark WebSocket connection
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- (void) openWebSocketConnection {
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// clean up any existing socket
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[webSocket setDelegate:nil];
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[webSocket close];
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webSocket = [[ZTWebSocket alloc] initWithURLString:self.fayeURLString delegate:self];
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[webSocket open];
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}
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- (void) closeWebSocketConnection {
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[webSocket close];
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}
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#pragma mark -
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#pragma mark Private Bayeux procotol functions
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/*
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Bayeux Handshake
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"channel": "/meta/handshake",
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"version": "1.0",
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"minimumVersion": "1.0beta",
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"supportedConnectionTypes": ["long-polling", "callback-polling", "iframe", "websocket]
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*/
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- (void) handshake {
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NSArray *connTypes = [NSArray arrayWithObjects:@"long-polling", @"callback-polling", @"iframe", @"websocket", nil];
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NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:HANDSHAKE_CHANNEL, @"channel", @"1.0", @"version", @"1.0beta", @"minimumVersion", connTypes, @"supportedConnectionTypes", nil];
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NSString *json = [dict JSONString];
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[webSocket send:json];
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}
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/*
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Bayeux Connect
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"channel": "/meta/connect",
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"clientId": "Un1q31d3nt1f13r",
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"connectionType": "long-polling"
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*/
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- (void) connect {
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NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:CONNECT_CHANNEL, @"channel", self.fayeClientId, @"clientId", @"websocket", @"connectionType", nil];
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NSString *json = [dict JSONString];
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[webSocket send:json];
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}
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/*
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{
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"channel": "/meta/disconnect",
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"clientId": "Un1q31d3nt1f13r"
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}
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*/
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- (void) disconnect {
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NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:DISCONNECT_CHANNEL, @"channel", self.fayeClientId, @"clientId", nil];
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NSString *json = [dict JSONString];
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[webSocket send:json];
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}
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/*
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{
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"channel": "/meta/subscribe",
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"clientId": "Un1q31d3nt1f13r",
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"subscription": "/foo/**"
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}
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*/
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- (void) subscribe {
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NSDictionary *dict = nil;
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if(nil == self.connectionExtension) {
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dict = [NSDictionary dictionaryWithObjectsAndKeys:SUBSCRIBE_CHANNEL, @"channel", self.fayeClientId, @"clientId", self.activeSubChannel, @"subscription", nil];
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} else {
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dict = [NSDictionary dictionaryWithObjectsAndKeys:SUBSCRIBE_CHANNEL, @"channel", self.fayeClientId, @"clientId", self.activeSubChannel, @"subscription", self.connectionExtension, @"ext", nil];
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}
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NSString *json = [dict JSONString];
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[webSocket send:json];
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}
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/*
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{
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"channel": "/meta/unsubscribe",
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"clientId": "Un1q31d3nt1f13r",
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"subscription": "/foo/**"
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}
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*/
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- (void) unsubscribe {
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NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:UNSUBSCRIBE_CHANNEL, @"channel", self.fayeClientId, @"clientId", self.activeSubChannel, @"subscription", nil];
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NSString *json = [dict JSONString];
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[webSocket send:json];
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}
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/*
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{
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"channel": "/some/channel",
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"clientId": "Un1q31d3nt1f13r",
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"data": "some application string or JSON encoded object",
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"id": "some unique message id"
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}
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*/
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- (void) publish:(NSDictionary *)messageDict withExt:(NSDictionary *)extension {
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NSString *channel = self.activeSubChannel;
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NSString *messageId = [NSString stringWithFormat:@"msg_%d_%d", [[NSDate date] timeIntervalSince1970], 1];
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NSDictionary *dict = nil;
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if(nil == extension) {
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dict = [NSDictionary dictionaryWithObjectsAndKeys:channel, @"channel", self.fayeClientId, @"clientId", messageDict, @"data", messageId, @"id", nil];
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} else {
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dict = [NSDictionary dictionaryWithObjectsAndKeys:channel, @"channel", self.fayeClientId, @"clientId", messageDict, @"data", messageId, @"id", extension, @"ext",nil];
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}
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NSString *json = [dict JSONString];
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[webSocket send:json];
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}
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#pragma mark -
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#pragma mark Faye message handling
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- (void) parseFayeMessage:(NSString *)message {
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// interpret the message(s)
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NSArray *messageArray = [message objectFromJSONString];
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for(NSDictionary *messageDict in messageArray) {
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FayeMessage *fm = [[FayeMessage alloc] initWithDict:messageDict];
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if ([fm.channel isEqualToString:HANDSHAKE_CHANNEL]) {
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if ([fm.successful boolValue]) {
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self.fayeClientId = fm.clientId;
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if(self.delegate != NULL && [self.delegate respondsToSelector:@selector(connectedToServer)]) {
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[self.delegate connectedToServer];
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}
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[self connect];
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// try to sub right after conn
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[self subscribe];
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} else {
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NSLog(@"ERROR WITH HANDSHAKE");
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}
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} else if ([fm.channel isEqualToString:CONNECT_CHANNEL]) {
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if ([fm.successful boolValue]) {
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fayeConnected = YES;
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[self connect];
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} else {
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NSLog(@"ERROR CONNECTING TO FAYE");
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}
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} else if ([fm.channel isEqualToString:DISCONNECT_CHANNEL]) {
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if ([fm.successful boolValue]) {
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fayeConnected = NO;
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[self closeWebSocketConnection];
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if(self.delegate != NULL && [self.delegate respondsToSelector:@selector(disconnectedFromServer)]) {
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[self.delegate disconnectedFromServer];
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}
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} else {
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NSLog(@"ERROR DISCONNECTING TO FAYE");
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}
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} else if ([fm.channel isEqualToString:SUBSCRIBE_CHANNEL]) {
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if ([fm.successful boolValue]) {
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NSLog(@"SUBSCRIBED TO CHANNEL %@ ON FAYE", fm.subscription);
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if(self.delegate != NULL && [self.delegate respondsToSelector:@selector(subscribedToChannel:)]) {
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[self.delegate subscribedToChannel:fm.subscription];
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}
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} else {
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NSLog(@"ERROR SUBSCRIBING TO %@ WITH ERROR %@", fm.subscription, fm.error);
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if(self.delegate != NULL && [self.delegate respondsToSelector:@selector(subscriptionFailedWithError:)]) {
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[self.delegate subscriptionFailedWithError:fm.error];
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}
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}
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} else if ([fm.channel isEqualToString:UNSUBSCRIBE_CHANNEL]) {
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NSLog(@"UNSUBSCRIBED FROM CHANNEL %@ ON FAYE", fm.subscription);
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} else if ([fm.channel isEqualToString:self.activeSubChannel]) {
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if(fm.data) {
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if(self.delegate != NULL && [self.delegate respondsToSelector:@selector(messageReceived:)]) {
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[self.delegate messageReceived:fm.data];
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}
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}
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} else {
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NSLog(@"NO MATCH FOR CHANNEL %@", fm.channel);
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}
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[fm release];
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}
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}
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@end |