我有一个python服务器,我使用stream delegate编写和读取。它运行正常但是当我开始匹配并且服务器发回数据时它崩溃了。
这里崩溃的地方:
func checkForMessages() {
while true {
if inputBuffer.length < 4 {
print("buffer length\(inputBuffer.length)")
print( MemoryLayout.size(ofValue: Int()))
print("application quit here")
return
}
var msgLength = (inputBuffer.bytes).load(as: UInt32.self)
msgLength = UInt32(bigEndian: msgLength)
print(inputBuffer.length)
print(msgLength)
if inputBuffer.length < msgLength {
print("its returning here!")
return
}
// ******Crashes on the line Below******
let message: Data? = inputBuffer.subdata(with: NSRange(location: 4, length: Int(msgLength)))
processMessage(message!)
let amtRemaining: Int = inputBuffer.length - Int(msgLength) - 4
if amtRemaining == 0 {
inputBuffer = NSMutableData()
}
else {
print("Creating input buffer of length \(amtRemaining)")
inputBuffer = NSMutableData(bytes: inputBuffer.bytes + 4 + Int(msgLength), length: amtRemaining)
}
}
}
设置&#34;让消息&#34;。
时崩溃我尝试了一些事情,比如试图弄乱范围本身,但我不太确定为什么它做它做的事情,我可以发布用于发送消息的服务器代码,如果需要的话。
答案 0 :(得分:0)
因此,通过替换代码的以下部分来解决问题:
if inputBuffer.length < msgLength {
return
}
与
if inputBuffer.length < msgLength + 4 {
return
}