duande3134
2017-08-05 06:38
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已采纳

在Golang中,为什么conn.Write tcp响应为空?

I have a tcp server that reads a file that sends the file content to the client.

The 'status.txt' file contains only a boolean.

When I curl, this shows true (with leading space).

dat, err := ioutil.ReadFile("./status.txt")
conn.Write([]byte(" " + string(dat)))

Whereas this code results in curl: (52) Empty reply from server.

conn.Write([]byte(string(dat)))

Any clue why this happens? I don't want to have to pad my response string.

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我有一个tcp服务器,该服务器读取一个文件,该文件将文件内容发送到客户端。

'status.txt'文件仅包含一个布尔值。

当我卷曲时,它会显示 true (带有前导空格)。

  dat,err:= ioutil.ReadFile(“ ./ status.txt”)
conn.Write([] byte(“” + string(dat)))
 <  / code>  
 
 

,此代码将导致 curl:(52)来自服务器的空回复

  conn.Write([] byte(string(dat)))
   
 
 

任何线索为何会发生这种情况 ? 我不需要填充响应字符串。

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1条回答 默认 最新

  • donglan6777 2017-08-05 14:27
    已采纳

    Don't use Curl if you are not using HTTP protocol. Curl is expecting certain format of the message that is compatible with HTTP protocol. If you send text "true", that is for sure not valid HTTP Header.

    To test TCP server use Netcat instead:

    nc localhost port
    
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