在Swift中通过TCP发送消息（NULL终止） [英] Sending Message Over TCP in Swift (NULL terminated)

问题描述

我使用swift套接字库与以下代码：

I am using swift socket library with the following code:

let client:TCPClient = TCPClient(addr: "127.0.0.1", port: 8080)
var (success,errmsg)=client.connect(timeout: 1)
if success{
    var (success,errmsg)=client.send(str:"|~\0" )
    if success{
        let data=client.read(1024*10)
        if let d=data{
            if let str=String(bytes: d, encoding: NSUTF8StringEncoding){
                print(str)
            }
        }
    }else{
        print(errmsg)
    }
}else{
    print(errmsg)
}

但我的问题是，我的服务器获取的数据没有null终止符，你可以看到在下一个链接： https：// gyazo .com / 1a6576b515d37c9400a58ac67bfa2350
我该怎么办？

The code works great but my problem is that my server gets the data without null-terminator, as you can see in the next link: https://gyazo.com/1a6576b515d37c9400a58ac67bfa2350 What can I do?

推荐答案

假设您使用这个库，在执行时有一个错误TCPClient.send（str：），因为它使用 strlen 每此行。 strlen 将在第一个 NUL 字符处终止。

Presuming you are using this library, there is a bug in the implementation of TCPClient.send(str:), as it uses strlen per this line. strlen will terminate at the first NUL character.

将代码更改为：

 var (success, errmsg) = client.send(data:Array<UInt8>("|~\0".utf8))

你应该很好

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