Receiving Error Domain=kCFErrorDomainCFNetwork Code=2 when attempting to read from ReadStream

Question

I'm attempting to synchronously read from a CFReadStream objected created by CFStreamCreatePairWithSocketToHost. The stream opened fine but when I attempt to invoke CFReadStreamRead on it in a loop, CFReadStreamRead() returns -1 and the resulting error is:

Error Domain=kCFErrorDomainCFNetwork Code=2 "The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 2.)" UserInfo=0x14a920 {kCFGetAddrInfoFailureKey=8}

I'm also receiving this same exact error when using this ReadStream asynchronously- the first callback I receive is this error.

Answer 1

I was able to eliminate this error by removing https:// from the host String.

NSStream.getStreamsToHostWithName("https://example.com" ...

You may need to set the appropriate security level:

 inputStream!.setProperty(NSStreamSocketSecurityLevelTLSv1, forKey: NSStreamSocketSecurityLevelKey)
outputStream!.setProperty(NSStreamSocketSecurityLevelTLSv1, forKey: NSStreamSocketSecurityLevelKey)