AsyncSockets - ReadToData - 无法按预期工作
这是我在 stackoverflow 上提出的第一个具体问题，因为我还没有找到任何有用的解决方案来解决我的问题。 我需要在 iPhone 和 OSX 工作站（作为 TCP 服务器）之间建立低级套接字连接，以交换一些媒体数据，例如图片或音频文件。所以我认为 AsyncSockets 是让它发挥作用的一个不错的选择。我经常用它来进行一些微小的字节通信。
我的问题是，我想使用一种标头/协议来告诉服务器管道中仍有多少数据字节。 像“hello world”这样的简单通信工作正常，因此不存在连接问题。
移动设备（想要发送图片）执行以下操作。
[self setHost:@"172.22.42.207"];
self.socket = [[[AsyncSocket alloc] initWithDelegate:self] autorelease];
NSError *err = nil;
[[self socket] connectToHost:self.host onPort:5009 error:&err];
...
NSData *t = UIImagePNGRepresentation(test);
NSString *header = [NSString stringWithFormat:@"%i", t.length];
NSMutableData *headerData = [[header dataUsingEncoding:NSUTF8StringEncoding] mutableCopy];
[headerData appendBytes:[AsyncSocket CRLFData] length:[[AsyncSocket CRLFData] length]];
[[self socket] writeData:headerData withTimeout:-1 tag:0];
服务器正在以这种方式监听：
AsyncSocket *s = [[AsyncSocket alloc] initWithDelegate:self];
NSError *err = nil;
[s acceptOnPort:5009 error:&err];
if(err)
NSLog(@"EPIC FAIL...\n%@", err);
....
- (void)onSocket:(AsyncSocket *)sock didAcceptNewSocket:(AsyncSocket *)newSocket
{
NSLog(@"%s", __PRETTY_FUNCTION__);
[newSocket readDataToData:[AsyncSocket CRLFData] withTimeout:-1 tag:0];
}
现在：如果我使用 readData:withTimeout:tag ，一切都会像魅力一样工作。但是，一旦我将代码更改为 readDataToData:withTimeout:tag，以将标头与其他内容分开，则永远不会调用 onSocket:didConnectToHost:port: 方法。这里有一些漂亮的函数日志（我将它们放在每个委托方法中）
Client side:
2012-01-31 13:40:32.962 AVMobile[20643:10703] -[SLViewController onSocket:didConnectToHost:port:]
2012-01-31 13:40:32.964 AVMobile[20643:10703] -[SLViewController onSocket:didWriteDataWithTag:]
Server side:
2012-01-31 13:40:32.961 AVServer[20618:707] -[SLAppDelegate onSocket:didAcceptNewSocket:]
所以，下一个想法...只需比较发送和接收字节，所以：
Sending: <33333736 35365cba>
Receiving: <33333736 35365cba>
是的...现在我的最后一个问题：我做错了什么！？ 为什么它对我不起作用:)？
问候和谢谢！ 狙击手x
It's my first specific question here on stackoverflow, cause I couldn't found any helpful solutions for my problem yet.
I need a low level socket connection between my iPhone and OSX Workstation (as TCP Server), to interchange some media data like pictures or audio files. So I think AsyncSockets is a good choise to get this to work. I've often used it for some tiny byte communication.
My Problem is, that I want to use a kind of a header/protocol to tell the server how much data bytes are still in pipe.
A simple communication like "hello world" is working fine, so there are no connection problems.
The mobile device (that wants to send a picture) does the following.
[self setHost:@"172.22.42.207"];
self.socket = [[[AsyncSocket alloc] initWithDelegate:self] autorelease];
NSError *err = nil;
[[self socket] connectToHost:self.host onPort:5009 error:&err];
...
NSData *t = UIImagePNGRepresentation(test);
NSString *header = [NSString stringWithFormat:@"%i", t.length];
NSMutableData *headerData = [[header dataUsingEncoding:NSUTF8StringEncoding] mutableCopy];
[headerData appendBytes:[AsyncSocket CRLFData] length:[[AsyncSocket CRLFData] length]];
[[self socket] writeData:headerData withTimeout:-1 tag:0];
The server is listening that way:
AsyncSocket *s = [[AsyncSocket alloc] initWithDelegate:self];
NSError *err = nil;
[s acceptOnPort:5009 error:&err];
if(err)
NSLog(@"EPIC FAIL...\n%@", err);
....
- (void)onSocket:(AsyncSocket *)sock didAcceptNewSocket:(AsyncSocket *)newSocket
{
NSLog(@"%s", __PRETTY_FUNCTION__);
[newSocket readDataToData:[AsyncSocket CRLFData] withTimeout:-1 tag:0];
}
Now: If I use readData:withTimeout:tag it all works like a charm. But once I change the code to readDataToData:withTimeout:tag, to split the header from the other content, the onSocket:didConnectToHost:port: method is never called. Here are some pretty function logs (I placed them in every delegate method)
Client side:
2012-01-31 13:40:32.962 AVMobile[20643:10703] -[SLViewController onSocket:didConnectToHost:port:]
2012-01-31 13:40:32.964 AVMobile[20643:10703] -[SLViewController onSocket:didWriteDataWithTag:]
Server side:
2012-01-31 13:40:32.961 AVServer[20618:707] -[SLAppDelegate onSocket:didAcceptNewSocket:]
So, next idea... just compare the sending and receiving bytes, so:
Sending: <33333736 35365cba>
Receiving: <33333736 35365cba>
Yeah... now my final question: What am I doing wrong!?
Why isn't it working out for me :)?
Greetings & thanks!
sniperosx
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找到了解决方案：
只是不要使用-1作为超时。
如果超时为 -1，AsyncSocket 会读取数据，直到另一方关闭连接，因此在此范围内不会调用委托方法。
干杯
狙击手
[已关闭]
Found a solution:
Just don't use -1 as timeout.
With -1 timeout the AsyncSocket is reading data until the other side is closing the connection, so in this range no delegate method is called.
Cheerz
sniperosx
[Closed]