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SocketIO.m
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SocketIO.m
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//
// SocketIO.m
// v0.5.1
//
// based on
// socketio-cocoa https://github.com/fpotter/socketio-cocoa
// by Fred Potter <[email protected]>
//
// using
// https://github.com/square/SocketRocket
//
// reusing some parts of
// /socket.io/socket.io.js
//
// Created by Philipp Kyeck http://beta-interactive.de
//
// With help from
// https://github.com/pkyeck/socket.IO-objc/blob/master/CONTRIBUTORS.md
//
#import "SocketIO.h"
#import "SocketIOPacket.h"
#import "SocketIOJSONSerialization.h"
#ifdef DEBUG
#define DEBUG_LOGS 1
#define DEBUG_CERTIFICATE 1
#else
#define DEBUG_LOGS 0
#define DEBUG_CERTIFICATE 0
#endif
#if DEBUG_LOGS
#define DEBUGLOG(...) NSLog(__VA_ARGS__)
#else
#define DEBUGLOG(...)
#endif
static NSString* kResourceName = @"socket.io";
static NSString* kTransportPolling = @"polling";
static NSString* kTransportWebsocket = @"websocket";
static NSString* kHandshakeURL = @"%@://%@%@/%@/1/?EIO=2&transport=%@&t=%.0f%@";
static NSString* kForceDisconnectURL = @"%@://%@%@/%@/1/xhr-polling/%@?disconnect";
float const defaultConnectionTimeout = 10.0f;
NSString* const SocketIOError = @"SocketIOError";
NSString* const SocketIOException = @"SocketIOException";
# pragma mark -
# pragma mark SocketIO's private interface
@interface SocketIO (Private)
- (NSArray*) arrayOfCaptureComponentsMatchedByRegex:(NSString*)regex;
- (void) setTimeout;
- (void) onTimeout;
- (void) sendHeartbeat;
- (void) onConnect:(SocketIOPacket *)packet;
- (void) onDisconnect:(NSError *)error;
- (void) sendDisconnect;
- (void) send:(SocketIOPacket *)packet;
- (NSString *) addAcknowledge:(SocketIOCallback)function;
- (void) removeAcknowledgeForKey:(NSString *)key;
- (NSMutableArray*) getMatchesFrom:(NSString*)data with:(NSString*)regex;
@end
# pragma mark -
# pragma mark SocketIO implementation
@implementation SocketIO
@synthesize isConnected = _isConnected,
isConnecting = _isConnecting,
useSecure = _useSecure,
cookies = _cookies,
delegate = _delegate,
heartbeatTimeout = _heartbeatTimeout,
returnAllDataFromAck = _returnAllDataFromAck;
- (id) initWithDelegate:(id<SocketIODelegate>)delegate
{
self = [super init];
if (self) {
_delegate = delegate;
_queue = [[NSMutableArray alloc] init];
_ackCount = 0;
_acks = [[NSMutableDictionary alloc] init];
_returnAllDataFromAck = NO;
}
return self;
}
- (void) connectToHost:(NSString *)host onPort:(NSInteger)port
{
[self connectToHost:host onPort:port withParams:nil withNamespace:@"" withConnectionTimeout:defaultConnectionTimeout];
}
- (void) connectToHost:(NSString *)host onPort:(NSInteger)port withParams:(NSDictionary *)params
{
[self connectToHost:host onPort:port withParams:params withNamespace:@"" withConnectionTimeout:defaultConnectionTimeout];
}
- (void) connectToHost:(NSString *)host
onPort:(NSInteger)port
withParams:(NSDictionary *)params
withNamespace:(NSString *)endpoint
{
[self connectToHost:host onPort:port withParams:params withNamespace:endpoint withConnectionTimeout:defaultConnectionTimeout];
}
- (void) connectToHost:(NSString *)host
onPort:(NSInteger)port
withParams:(NSDictionary *)params
withNamespace:(NSString *)endpoint
withConnectionTimeout:(NSTimeInterval)connectionTimeout
{
if (!_isConnected && !_isConnecting) {
_isConnecting = YES;
_host = host;
_port = port;
_params = params;
_endpoint = [endpoint copy];
// create a query parameters string
NSMutableString *query = [[NSMutableString alloc] initWithString:@""];
[params enumerateKeysAndObjectsUsingBlock: ^(id key, id value, BOOL *stop) {
[query appendFormat:@"&%@=%@", key, value];
}];
// do handshake via HTTP request
NSString *protocol = _useSecure ? @"https" : @"http";
NSString *port = _port ? [NSString stringWithFormat:@":%ld", (long)_port] : @"";
NSTimeInterval time = [[NSDate date] timeIntervalSince1970] * 1000;
NSString *handshakeUrl = [NSString stringWithFormat:kHandshakeURL, protocol, _host, port, kResourceName,kTransportPolling, time, query];
//@"%@://%@%@/%@/1/?t=%.0f%@";
//http://<host><port>/socket.io/1/?t=<time>f<query>
DEBUGLOG(@"Connecting to socket with URL: %@", handshakeUrl);
query = nil;
// make a request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:handshakeUrl]
cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData
timeoutInterval:connectionTimeout];
if (_cookies != nil) {
DEBUGLOG(@"Adding cookie(s): %@", [_cookies description]);
NSDictionary *headers = [NSHTTPCookie requestHeaderFieldsWithCookies:_cookies];
[request setAllHTTPHeaderFields:headers];
}
[request setHTTPShouldHandleCookies:YES];
_handshake = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:NO];
[_handshake scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
[_handshake start];
if (_handshake) {
_httpRequestData = [NSMutableData data];
}
else {
// connection failed
[self connection:_handshake didFailWithError:nil];
}
}
}
- (void) disconnect
{
if (_isConnected) {
[self sendDisconnect];
}
else if (_isConnecting) {
[_handshake cancel];
[self onDisconnect: nil];
}
}
- (void) disconnectForced
{
NSString *protocol = [self useSecure] ? @"https" : @"http";
NSString *port = _port ? [NSString stringWithFormat:@":%ld", (long)_port] : @"";
NSString *urlString = [NSString stringWithFormat:kForceDisconnectURL, protocol, _host, port, kResourceName, _sid];
NSURL *url = [NSURL URLWithString:urlString];
DEBUGLOG(@"Force disconnect at: %@", urlString);
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSError *error = nil;
NSHTTPURLResponse *response = nil;
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if (error || [response statusCode] != 200) {
DEBUGLOG(@"Error during disconnect: %@", error);
}
[self onDisconnect:error];
}
- (void) sendMessage:(NSString *)data
{
[self sendMessage:data withAcknowledge:nil];
}
- (void) sendMessage:(NSString *)data withAcknowledge:(SocketIOCallback)function
{
switch (_version)
{
case V09x:
{
SocketIOPacket *packet = [[SocketIOPacket alloc] initWithType:@"message"];
packet.data = data;
packet.pId = [self addAcknowledge:function];
[self send:packet];
}break;
case V10x:
{
[self sendEvent:@"message" withData:data];
}break;
}
}
- (void) sendJSON:(NSDictionary *)data
{
[self sendJSON:data withAcknowledge:nil];
}
- (void) sendJSON:(NSDictionary *)data withAcknowledge:(SocketIOCallback)function
{
switch (_version)
{
case V09x:
{
SocketIOPacket *packet = [[SocketIOPacket alloc] initWithType:@"json"];
packet.data = [SocketIOJSONSerialization JSONStringFromObject:data error:nil];
packet.pId = [self addAcknowledge:function];
[self send:packet];
}break;
case V10x:
{
[self sendEvent:@"message" withData:data andAcknowledge:function];
}break;
}
}
- (void) sendEvent:(NSString *)eventName withData:(id)data
{
[self sendEvent:eventName withData:data andAcknowledge:nil];
}
- (void) sendEvent:(NSString *)eventName withData:(id)data andAcknowledge:(SocketIOCallback)function
{
SocketIOPacket *packet ;
switch (_version) {
case V10x:
{
packet = [[SocketIOPacketV10x alloc] initWithType:@"event"];
NSMutableArray *array = [NSMutableArray arrayWithObjects:eventName, nil];
// do not require arguments
if (data != nil)
{
[array addObject:data];
}
packet.data = [SocketIOJSONSerialization JSONStringFromObject:array error:nil];
//packet.data = [packet.data stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];
}break;
case V09x:
{
packet = [[SocketIOPacket alloc] initWithType:@"event"];
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithObject:eventName forKey:@"name"];
// do not require arguments
if (data != nil)
{
[dict setObject:[NSArray arrayWithObject:data] forKey:@"args"];
}
packet.data = [SocketIOJSONSerialization JSONStringFromObject:dict error:nil];
}break;
}
packet.name =eventName;
packet.pId = [self addAcknowledge:function];
if (function) {
packet.ack = @"data";
}
NSLog(@"%@", packet.data);
[self send:packet];
}
- (void) sendAcknowledgement:(NSString *)pId withArgs:(NSArray *)data
{
SocketIOPacket *packet = [[SocketIOPacket alloc] initWithType:@"ack"];
packet.data = [SocketIOJSONSerialization JSONStringFromObject:data error:nil];
packet.pId = pId;
packet.ack = @"data";
[self send:packet];
}
- (void) setResourceName:(NSString *)name
{
kResourceName = [name copy];
}
# pragma mark -
# pragma mark private methods
- (void) sendDisconnect
{
SocketIOPacket *packet = [SocketIOPacket createPacketWithType:@"disconnect" version:_version];
[self send:packet];
[self onDisconnect:nil];
}
- (void) sendConnect
{
SocketIOPacket *packet = [SocketIOPacket createPacketWithType:@"connect" version:_version];
[self send:packet];
}
- (void) sendHeartbeat
{
SocketIOPacket *packet = [SocketIOPacket createPacketWithType:@"heartbeat" version:_version];
[self send:packet];
}
- (void) send:(SocketIOPacket *)packet
{
if (![self isConnected] && ![self isConnecting]) {
DEBUGLOG(@"Already disconnected!");
return;
}
DEBUGLOG(@"Prepare to send()");
packet.endpoint = _endpoint;
NSString *req = [packet toString];
if (![_transport isReady]) {
DEBUGLOG(@"queue >>> %@", req);
[_queue addObject:packet];
}
else {
DEBUGLOG(@"send() >>> %@", req);
[_transport send:req];
if ([_delegate respondsToSelector:@selector(socketIO:didSendMessage:)]) {
[_delegate socketIO:self didSendMessage:packet];
}
}
}
- (void) doQueue
{
DEBUGLOG(@"doQueue() >> %lu", (unsigned long)[_queue count]);
// TODO send all packets at once ... not as seperate packets
while ([_queue count] > 0) {
SocketIOPacket *packet = [_queue objectAtIndex:0];
[self send:packet];
[_queue removeObject:packet];
}
}
- (void) onConnect:(SocketIOPacket *)packet
{
DEBUGLOG(@"onConnect()");
_isConnected = YES;
// Send the connected packet so the server knows what it's dealing with.
// Only required when endpoint/namespace is present
if ([_endpoint length] > 0) {
// Make sure the packet we received has an endpoint, otherwise send it again
if (![packet.endpoint isEqualToString:_endpoint]) {
DEBUGLOG(@"onConnect() >> End points do not match, resending connect packet");
[self sendConnect];
return;
}
}
_isConnecting = NO;
if ([_delegate respondsToSelector:@selector(socketIODidConnect:)]) {
[_delegate socketIODidConnect:self];
}
// send any queued packets
[self doQueue];
[self setTimeout];
}
# pragma mark -
# pragma mark Acknowledge methods
- (NSString *) addAcknowledge:(SocketIOCallback)function
{
if (function) {
++_ackCount;
NSString *ac = [NSString stringWithFormat:@"%ld", (long)_ackCount];
[_acks setObject:[function copy] forKey:ac];
return ac;
}
return nil;
}
- (void) removeAcknowledgeForKey:(NSString *)key
{
[_acks removeObjectForKey:key];
}
# pragma mark -
# pragma mark Heartbeat methods
- (void) onTimeout
{
if (_timeout) {
dispatch_source_cancel(_timeout);
_timeout = NULL;
}
DEBUGLOG(@"Timed out waiting for heartbeat.");
[self onDisconnect:[NSError errorWithDomain:SocketIOError
code:SocketIOHeartbeatTimeout
userInfo:nil]];
}
- (void) setTimeout
{
//DEBUGLOG(@"start/reset timeout");
if (_timeout) {
dispatch_source_cancel(_timeout);
_timeout = NULL;
}
_timeout = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER,
0,
0,
dispatch_get_main_queue());
dispatch_source_set_timer(_timeout,
dispatch_time(DISPATCH_TIME_NOW, _connectionTimeout * NSEC_PER_SEC),
0,
0);
__weak SocketIO *weakSelf = self;
dispatch_source_set_event_handler(_timeout, ^{
[weakSelf onTimeout];
});
dispatch_resume(_timeout);
}
- (void) onHeartBeat
{
[self sendHeartbeat];
}
- (void) setHeartBeat
{
DEBUGLOG(@"start/reset Heartbeat");
if (_heartbeat)
{
dispatch_source_cancel(_heartbeat);
_heartbeat = NULL;
}
_heartbeat = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER,
0,
0,
dispatch_get_main_queue());
dispatch_source_set_timer(_heartbeat,
dispatch_time(DISPATCH_TIME_NOW, DISPATCH_TIME_NOW),
_heartbeatTimeout * NSEC_PER_SEC,
0);
__weak SocketIO *weakSelf = self;
dispatch_source_set_event_handler(_heartbeat, ^{
[weakSelf onHeartBeat];
});
dispatch_resume(_heartbeat);
}
# pragma mark -
# pragma mark Regex helper method
- (NSMutableArray*) getMatchesFrom:(NSString*)data with:(NSString*)regex
{
NSRegularExpression *nsregexTest = [NSRegularExpression regularExpressionWithPattern:regex options:0 error:nil];
NSArray *nsmatchesTest = [nsregexTest matchesInString:data options:0 range:NSMakeRange(0, [data length])];
NSMutableArray *arr = [NSMutableArray array];
for (NSTextCheckingResult *nsmatchTest in nsmatchesTest) {
NSMutableArray *localMatch = [NSMutableArray array];
for (NSUInteger i = 0, l = [nsmatchTest numberOfRanges]; i < l; i++) {
NSRange range = [nsmatchTest rangeAtIndex:i];
NSString *nsmatchStr = nil;
if (range.location != NSNotFound && NSMaxRange(range) <= [data length]) {
nsmatchStr = [data substringWithRange:[nsmatchTest rangeAtIndex:i]];
}
else {
nsmatchStr = @"";
}
[localMatch addObject:nsmatchStr];
}
[arr addObject:localMatch];
}
return arr;
}
#pragma mark -
#pragma mark SocketIOTransport callbacks
- (void) onData:(NSString *)data
{
DEBUGLOG(@"onData %@", data);
// data arrived -> reset timeout
[self setTimeout];
// check if data is valid (from socket.io.js)
switch(_version)
{
case V09x:
{
NSString *regex = @"^([^:]+):([0-9]+)?(\\+)?:([^:]+)?:?(.*)?$";
NSString *regexPieces = @"^([0-9]+)(\\+)?(.*)";
// create regex result
NSMutableArray *test = [self getMatchesFrom:data with:regex];
// valid data-string arrived
if ([test count] > 0) {
NSArray *result = [test objectAtIndex:0];
int idx = [[result objectAtIndex:1] intValue];
SocketIOPacket *packet = [[SocketIOPacket alloc] initWithTypeIndex:idx];
packet.pId = [result objectAtIndex:2];
packet.ack = [result objectAtIndex:3];
packet.endpoint = [result objectAtIndex:4];
packet.data = [result objectAtIndex:5];
//
switch (idx)
{
case 0: {
DEBUGLOG(@"disconnect");
[self onDisconnect:[NSError errorWithDomain:SocketIOError
code:SocketIOServerRespondedWithDisconnect
userInfo:nil]];
break;
}
case 1: {
DEBUGLOG(@"connected");
// from socket.io.js ... not sure when data will contain sth?!
// packet.qs = data || '';
[self onConnect:packet];
break;
}
case 2: {
DEBUGLOG(@"heartbeat");
[self sendHeartbeat];
break;
}
case 3: {
DEBUGLOG(@"message");
if (packet.data && ![packet.data isEqualToString:@""]) {
if ([_delegate respondsToSelector:@selector(socketIO:didReceiveMessage:)]) {
[_delegate socketIO:self didReceiveMessage:packet];
}
}
break;
}
case 4: {
DEBUGLOG(@"json");
if (packet.data && ![packet.data isEqualToString:@""]) {
if ([_delegate respondsToSelector:@selector(socketIO:didReceiveJSON:)]) {
[_delegate socketIO:self didReceiveJSON:packet];
}
}
break;
}
case 5: {
DEBUGLOG(@"event");
if (packet.data && ![packet.data isEqualToString:@""]) {
NSDictionary *json = [packet dataAsJSON];
packet.name = [json objectForKey:@"name"];
packet.args = [json objectForKey:@"args"];
if ([_delegate respondsToSelector:@selector(socketIO:didReceiveEvent:)]) {
[_delegate socketIO:self didReceiveEvent:packet];
}
}
break;
}
case 6: {
DEBUGLOG(@"ack");
// create regex result
NSMutableArray *pieces = [self getMatchesFrom:packet.data with:regexPieces];
if ([pieces count] > 0) {
NSArray *piece = [pieces objectAtIndex:0];
int ackId = [[piece objectAtIndex:1] intValue];
DEBUGLOG(@"ack id found: %d", ackId);
NSString *argsStr = [piece objectAtIndex:3];
id argsData = nil;
if (argsStr && ![argsStr isEqualToString:@""]) {
argsData = [SocketIOJSONSerialization objectFromJSONData:[argsStr dataUsingEncoding:NSUTF8StringEncoding] error:nil];
// either send complete response or only the first arg to callback
if (!_returnAllDataFromAck && [argsData count] > 0) {
argsData = [argsData objectAtIndex:0];
}
}
// get selector for ackId
NSString *key = [NSString stringWithFormat:@"%d", ackId];
SocketIOCallback callbackFunction = [_acks objectForKey:key];
if (callbackFunction != nil) {
callbackFunction(argsData);
[self removeAcknowledgeForKey:key];
}
}
break;
}
case 7: {
DEBUGLOG(@"error");
break;
}
case 8: {
DEBUGLOG(@"noop");
break;
}
default: {
DEBUGLOG(@"command not found or not yet supported");
break;
}
}
packet = nil;
}
else {
DEBUGLOG(@"ERROR: data that has arrived wasn't valid");
}
}break;
case V10x:
{
//42<NAMESPACE>["<event>","{}"]
//GET VERSION
NSUInteger control = [[NSNumber numberWithUnsignedChar:[data characterAtIndex:0]] integerValue]
-[[NSNumber numberWithUnsignedChar:'0'] integerValue];
NSUInteger ack = 0;
SocketIOPacket *packet = [[SocketIOPacketV10x alloc] initWithTypeIndex:control];
//dont care about the endpoint here
packet.endpoint = @"";
//GET GETDATA
if(data.length>1)
packet.data = [data substringFromIndex:1];
else
packet.data = @"";
switch (control)
{
case 0:
//??
break;
case 1:
//??
break;
case 2:
//Ping->Pong
[self sendMessage:[NSString stringWithFormat:@"3:%@", data]];
break;
case 3:
//Pong
if([data isEqualToString:@"probe"])
[self sendMessage:@"5"];
break;
case 4:
{
//Message
control = [[NSNumber numberWithUnsignedChar:[packet.data characterAtIndex:0]] integerValue]
-[[NSNumber numberWithUnsignedChar:'0'] integerValue];
if([packet.data length] > 1){
NSRange range = NSMakeRange(1, [packet.data rangeOfString:@"["].location-1);
NSString *ackStr = [packet.data substringWithRange:range];
ack = [ackStr integerValue];
}
//GET ENDPOINT
NSUInteger rendpoint = [packet.data rangeOfString:@"["].location;
if(rendpoint == NSNotFound)
packet.endpoint = packet.data;
else
packet.endpoint = [packet.data substringToIndex:rendpoint];
//GET GETDATA
if(rendpoint == NSNotFound)
packet.data = @"";
else
packet.data = [packet.data substringFromIndex:rendpoint];
switch (control) {
case 0:
//Connected
[self onConnect:packet];
break;
case 1:
//Disconnected
[self onDisconnect:[NSError errorWithDomain:SocketIOError
code:SocketIOServerRespondedWithDisconnect
userInfo:nil]];
break;
case 2:
{
//Event
if([packet.data characterAtIndex:0] == '[' && [packet.data characterAtIndex:packet.data.length-1] == ']')
{
NSData *utf8Data = [packet.data dataUsingEncoding:NSUTF8StringEncoding];
NSArray *parsedData = [SocketIOJSONSerialization objectFromJSONData:utf8Data error:nil];
DEBUGLOG(@"Event Type:%@",parsedData[0]);
packet.name = parsedData[0];
packet.args = [parsedData subarrayWithRange:NSMakeRange(1, parsedData.count-1)];
if([packet.name isEqualToString:@"message"])
{
// data is specified as NSString, so rewrap it...
packet.data = [SocketIOJSONSerialization JSONStringFromObject:packet.args[0] error:nil];
if ([_delegate respondsToSelector:@selector(socketIO:didReceiveMessage:)]) {
[_delegate socketIO:self didReceiveMessage:packet];
}
}
else
{
if ([_delegate respondsToSelector:@selector(socketIO:didReceiveEvent:)]) {
[_delegate socketIO:self didReceiveEvent:packet];
}
}
}
} break;
case 3:
{
if (ack > 0) {
NSUInteger ackId = ack;
DEBUGLOG(@"ack id found: %d", (unsigned int)ackId);
NSString *argsStr = [packet.data substringFromIndex:1 ];
argsStr = [argsStr substringToIndex:argsStr.length-1];
id argsData = nil;
if (argsStr && ![argsStr isEqualToString:@""]) {
argsData = [SocketIOJSONSerialization objectFromJSONData:[argsStr dataUsingEncoding:NSUTF8StringEncoding] error:nil];
// either send complete response or only the first arg to callback
// if (!_returnAllDataFromAck && [argsData count] > 0) {
// argsData = [argsData objectAtIndex:0];
// }
}
// get selector for ackId
NSString *key = [NSString stringWithFormat:@"%d", (unsigned int)ackId];
SocketIOCallback callbackFunction = [_acks objectForKey:key];
if (callbackFunction != nil) {
callbackFunction(argsData);
[self removeAcknowledgeForKey:key];
}
}
} break;
case 4:
//Error
break;
case 5:
//Binary Event
break;
case 6:
//Binary Ack
break;
default:
break;
}
} break;
case 5:
//Upgrade Required
break;
case 6:
//Noop
break;
default:
break;
}
}break;
}
}
- (void) onDisconnect:(NSError *)error
{
DEBUGLOG(@"onDisconnect()");
BOOL wasConnected = _isConnected;
BOOL wasConnecting = _isConnecting;
_isConnected = NO;
_isConnecting = NO;
_sid = nil;
[_queue removeAllObjects];
// Kill the heartbeat timer
if (_heartbeat) {
dispatch_source_cancel(_heartbeat);
_heartbeat = NULL;
}
if (_timeout) {
dispatch_source_cancel(_timeout);
_timeout = NULL;
}
// Disconnect the websocket, just in case
if (_transport != nil) {
// clear websocket's delegate - otherwise crashes
_transport.delegate = nil;
[_transport close];
}
if ((wasConnected || wasConnecting)) {
if ([_delegate respondsToSelector:@selector(socketIODidDisconnect:disconnectedWithError:)]) {
[_delegate socketIODidDisconnect:self disconnectedWithError:error];
}
}
}
- (void) onError:(NSError *)error
{
if ([_delegate respondsToSelector:@selector(socketIO:onError:)]) {
[_delegate socketIO:self onError:error];
}
}
# pragma mark -
# pragma mark Handshake callbacks (NSURLConnectionDataDelegate)
- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// check for server status code (http://gigliwood.com/weblog/Cocoa/Q__When_is_an_conne.html)
if ([response respondsToSelector:@selector(statusCode)]) {
NSInteger statusCode = [((NSHTTPURLResponse *)response) statusCode];
DEBUGLOG(@"didReceiveResponse() %i", (int)statusCode);
if (statusCode >= 400) {
// stop connecting; no more delegate messages
[connection cancel];
NSString *error = [NSString stringWithFormat:NSLocalizedString(@"Server returned status code %d", @""), statusCode];
NSDictionary *errorInfo = [NSDictionary dictionaryWithObject:error forKey:NSLocalizedDescriptionKey];
NSError *statusError = [NSError errorWithDomain:SocketIOError
code:statusCode
userInfo:errorInfo];
// call error callback manually
[self connection:connection didFailWithError:statusError];
}
}
[_httpRequestData setLength:0];
}
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[_httpRequestData appendData:data];
}
- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"ERROR: handshake failed ... %@", [error localizedDescription]);
int errorCode = [error code] == 403 ? SocketIOUnauthorized : SocketIOHandshakeFailed;
_isConnected = NO;
_isConnecting = NO;
if ([_delegate respondsToSelector:@selector(socketIO:onError:)]) {
NSMutableDictionary *errorInfo = [[NSDictionary dictionaryWithObject:error
forKey:NSUnderlyingErrorKey] mutableCopy];
NSError *err = [NSError errorWithDomain:SocketIOError
code:errorCode
userInfo:errorInfo];
[_delegate socketIO:self onError:err];
}
}
- (void) connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *responseString = [[NSString alloc] initWithData:_httpRequestData encoding:NSASCIIStringEncoding];
DEBUGLOG(@"connectionDidFinishLoading()");
NSString *responseV09Regex = @"([^:]+):([^:]+):([^:]+):([^:]+)";
NSPredicate *version09predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", responseV09Regex];
BOOL connectionFailed = false;
NSError* error;
if([version09predicate evaluateWithObject:responseString])
{
DEBUGLOG(@"Response %@", responseString);
//version 09x
_version = V09x;
NSArray *data = [responseString componentsSeparatedByString:@":"];
// should be SID : heartbeat timeout : connection timeout : supported transports in V09x
// should be ...0{"sid":"<sid>","upgrades":[<transports>,...],"pingInterval":<timeHeartbeat>,"pingTimeout":<timeOut>} in V10x
// check each returned value (thanks for the input https://github.com/taiyangc)
_sid = [data objectAtIndex:0];
if ([_sid length] < 1 || [data count] < 4) {
// did not receive valid data, possibly missing a useSecure?
connectionFailed = true;
}
else
{
// check SID
DEBUGLOG(@"sid: %@", _sid);
NSString *regex = @"[^0-9]";
NSPredicate *regexTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
if ([_sid rangeOfString:@"error"].location != NSNotFound || [regexTest evaluateWithObject:_sid])
{
[self connectToHost:_host onPort:_port withParams:_params withNamespace:_endpoint];
return;
}
// check heartbeat timeout
_heartbeatTimeout = [[data objectAtIndex:1] floatValue];
if (_heartbeatTimeout == 0.0) {
// couldn't find float value -> fail
connectionFailed = true;
}
else {
// add small buffer of 7sec (magic xD) otherwise heartbeat will be too late and connection is closed
_heartbeatTimeout += 7.0;
}
_connectionTimeout = [[data objectAtIndex:2] floatValue];
if (_connectionTimeout == 0.0) {
// couldn't find float value -> fail
connectionFailed = true;
}
else {
// add small buffer of 7sec (magic xD) otherwise connection will be too late and connection is closed
_connectionTimeout += 7.0;
}
DEBUGLOG(@"heartbeatTimeout: %f", _heartbeatTimeout);
// index 2 => connection timeout
// get transports
NSString *t = [data objectAtIndex:3];
NSArray *transports = [t componentsSeparatedByString:@","];
DEBUGLOG(@"transports: %@", transports);
static Class webSocketTransportClass;
static Class xhrTransportClass;
if (webSocketTransportClass == nil) {
webSocketTransportClass = NSClassFromString(@"SocketIOTransportWebsocket");
}
if (xhrTransportClass == nil) {
xhrTransportClass = NSClassFromString(@"SocketIOTransportXHR");
}
if (webSocketTransportClass != nil && [transports indexOfObject:@"websocket"] != NSNotFound) {
DEBUGLOG(@"websocket supported -> using it now");
_transport = [[webSocketTransportClass alloc] initWithDelegate:self];
}
else if (xhrTransportClass != nil && [transports indexOfObject:@"xhr-polling"] != NSNotFound) {
DEBUGLOG(@"xhr polling supported -> using it now");
_transport = [[xhrTransportClass alloc] initWithDelegate:self];
}
else {