英文:
Golang os.stdin as a Reader in Goroutines
问题
在Goroutine中使用os.Stdin作为Reader是否可以？基本上，我想要实现的是在不阻塞主线程的情况下，让用户输入一条消息。
示例：
go func() {for {consolereader := bufio.NewReader(os.Stdin)input, err := consolereader.ReadString('\n') // 这将提示用户输入if err != nil {fmt.Println(err)os.Exit(1)}fmt.Println(input)}}()
英文:
Is it okay to use os.stdin as a Reader in a Goroutine? Basically what I would like to accomplish is to enable the user to enter a message without blocking the main thread.
Example:
go func() {for {consolereader := bufio.NewReader(os.Stdin)input, err := consolereader.ReadString('\n') // this will prompt the user for inputif err != nil {fmt.Println(err)os.Exit(1)}fmt.Println(input)}}()
答案1
得分: 2
是的，这是完全可以的。只要这是唯一与os.Stdin交互的goroutine，一切都会正常工作。
顺便说一下，你可能想使用bufio.Scanner - 它比bufio.Reader更好用：
go func() {consolescanner := bufio.NewScanner(os.Stdin)// 默认情况下，bufio.Scanner会扫描以换行符分隔的行for consolescanner.Scan() {input := consolescanner.Text()fmt.Println(input)}// 在最后检查一次是否遇到了任何错误// （一旦遇到错误，Scan()方法将立即返回false）if err := consolescanner.Err(); err != nil {fmt.Println(err)os.Exit(1)}}()
英文:
Yes, this is perfectly fine. So long as this is the only goroutine that is interacting with os.Stdin, everything will work properly.
By the way, you may want to use bufio.Scanner - it's a bit nicer to work with than bufio.Reader:
go func() {consolescanner := bufio.NewScanner(os.Stdin)// by default, bufio.Scanner scans newline-separated linesfor consolescanner.Scan() {input := consolescanner.Text()fmt.Println(input)}// check once at the end to see if any errors// were encountered (the Scan() method will// return false as soon as an error is encountered)if err := consolescanner.Err(); err != nil {fmt.Println(err)os.Exit(1)}}()
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