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  1. #1
    Question about Input/Output Streams (sockets)

    Member Since
    Dec 30, 2008
    Posts
    14
    Question about Input/Output Streams (sockets)
    If I open a network connection with the code below do I need to do anything special to keep the program running? It is opening the streams, but then the program just exits. Do I need to fire up a thread or something?

    All I am trying to do is connect to time-a.nist.gov on port 13. All that server does is print out the time and then disconnect. My stream:handleEvent: delegate isn't even getting called.

    Code:
    -(void)connectToHost {
    	NSLog(@"in connect to host!");
    	[NSStream getStreamsToHost:host port:13 inputStream:&iStream outputStream:&oStream];
    	[iStream retain];
    	NSLog(@"istream = %@",iStream);
    	[oStream retain];	
    	[iStream setDelegate:self];	
    	[oStream setDelegate:self];	
    	[iStream scheduleInRunLoop:[NSRunLoop currentRunLoop]	 
    					   forMode:NSDefaultRunLoopMode];
    		[oStream scheduleInRunLoop:[NSRunLoop currentRunLoop]	 
    					   forMode:NSDefaultRunLoopMode];	
    	[iStream open];	
    	[oStream open];
    }
    
    - (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode {
    	NSLog(@"in handleEvent, eventcode = %i", eventCode);
        switch(eventCode) {			
            case NSStreamEventHasBytesAvailable:  {
    			NSLog(@"in has bytes");
                if(!data) {				
                    data = [[NSMutableData data] retain];				
                }
    			
                uint8_t buf[1024];			
                unsigned int len = 0;			
                len = [(NSInputStream *)stream read:buf maxLength:1024];
    			
                if(len) {				
                    [data appendBytes:(const void *)buf length:len];
    				NSLog(@"len: %i", len);
                    //[bytesRead setIntValue:[bytesRead intValue]+len];				
                } else {				
                    NSLog(@"no buffer!");				
                }
    			
                break;			
            }
    	}
    }
    The output of my code (not all the code that produces this output is shown):

    2009-01-08 00:25:00.878 StreamTester[25503:10b] Starting StreamTester...
    2009-01-08 00:25:01.086 StreamTester[25503:10b] Hostname = <NSHost 0x1072e0> time-a.nist.gov (<CFArray 0x107220 [0xa041c1a0]>{type = mutable-small, count = 2, values = (
    0 : <CFString 0x107b60 [0xa041c1a0]>{contents = "time-a.nist.gov"}
    1 : <CFString 0x1076a0 [0xa041c1a0]>{contents = "time-a"}
    )} <CFArray 0x107200 [0xa041c1a0]>{type = mutable-small, count = 1, values = (
    0 : <CFString 0x1072b0 [0xa041c1a0]>{contents = "129.6.15.28"}
    )})
    2009-01-08 00:25:01.087 StreamTester[25503:10b] in connect to host!
    2009-01-08 00:25:01.091 StreamTester[25503:10b] istream = <NSCFInputStream: 0x108050>
    The Debugger has exited with status 0.

    Have mercy on me I am a better than average Java programmer, but total newb for Objective-C and Cocoa:-)

  2. #2
    Question about Input/Output Streams (sockets)
    SpaceTeaBoo's Avatar
    Member Since
    Jan 07, 2009
    Location
    USA
    Posts
    4
    Specs:
    SpaceTeaBoo
    Need help with the site
    Hello

    I want to know how to set my Photo as avatar. But I have some troubles when try to upload photo.
    Some times photo does not upload. Or when I upload the photo, it has deformation.
    What should I do to fix that?

    Thanks for help

  3. #3
    Question about Input/Output Streams (sockets)
    SpaceTeaBoo's Avatar
    Member Since
    Jan 07, 2009
    Location
    USA
    Posts
    4
    Specs:
    SpaceTeaBoo
    Your site
    Hi guys

    Can you help me. I have troubles with your web site. It it works not fast.
    Can somebody help me to solve the problem or explain why it can be so?

    Thanks a lot

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