设置SOCKS代理配置后CFStream崩溃

Question

下面的代码有什么问题？我使用AsyncSocket连接到SOCKS代理并在onSocketWillConnect委托方法上设置代理设置.如果我省略了调用CFReadStreamSetProperty和CFWriteStreamSetProperty插座式连接器能够顺利跟进.另外,我在一个没有可跟踪堆栈跟踪的解除分配的实例上得到[Not A Type retain](它可能与CFNetwork有关？).有谁知道是什么给出的？

CFDictionaryRef proxyDict = CFNetworkCopySystemProxySettings();
CFMutableDictionaryRef socksConfig = CFDictionaryCreateMutableCopy(NULL, 0, proxyDict);
CFDictionarySetValue(socksConfig, kCFStreamPropertySOCKSProxyHost, CFSTR("192.168.1.148"));
CFDictionarySetValue(socksConfig, kCFStreamPropertySOCKSProxyPort, (__bridge CFNumberRef)[NSNumber numberWithInt:3129]);
CFDictionarySetValue(socksConfig, kCFStreamPropertySOCKSVersion, kCFStreamSocketSOCKSVersion4);

// set SOCKS for read streams
CFReadStreamRef readStream = [sock getCFReadStream];
if (!CFReadStreamSetProperty(readStream, kCFStreamPropertySOCKSProxy, socksConfig)) {
  CFStreamError error = CFReadStreamGetError(readStream);
  NSLog(@"[SEVERE] Web Socket Read Stream Error: %ld[%ld]", error.domain, error.error);
}

// set SOCKS for write stream
CFWriteStreamRef writeStream = [sock getCFWriteStream];
if (!CFWriteStreamSetProperty(writeStream, kCFStreamPropertySOCKSProxy, socksConfig)) {
  CFStreamError error = CFWriteStreamGetError(writeStream);
  NSLog(@"[SEVERE] Web Socket Write Stream Error: %ld[%ld]", error.domain, error.error);
}

// Release
CFRelease(socksConfig);
CFRelease(proxyDict);

Answer 1

来自 CFReadStream 的文档：

可以设置的属性配置流的行为，并且只能在特定时间修改，例如在打开流之前。（事实上​​，除非另有说明，否则您应该假设只能在打开流之前设置属性。）

onSocketWillConnect设置这些属性可能为时已晚。