What does the go language eof error refer to?

The EOF error in Go language indicates the end of file encountered during a read or write operation, due to end of file, write completion, or I/O failure. Processing method: 1. Use the io.EOF constant to determine EOF; 2. Use the errors.Is function to check for errors.

What is an EOF error in Go language?

In the Go language, an EOF (end of file) error indicates that the end of file was encountered during a read or write operation. This means that the end of the file has been reached and no more data is available.

Common Causes of EOF Errors

EOF errors are usually caused by:

• In a read operation, it was successful The end of the file is reached.
• During the write operation, all contents of the file were successfully written.
• While processing the file, an unexpected error occurred that caused the underlying I/O to fail, such as insufficient disk space or a file permissions issue.

How to handle EOF errors

When handling EOF errors in the Go language, there are two common methods:

1. Use built-in io.EOF constants:

func read(r io.Reader) error {
    for {
        buf := make([]byte, 4096)
        n, err := r.Read(buf)
        if err == io.EOF {
            // 已到达文件末尾，停止读取
            return nil
        } else if err != nil {
            return err
        }
        // 处理已读取的数据
    }
}

2. Use errors.Is function to check for errors:

func read(r io.Reader) error {
    for {
        buf := make([]byte, 4096)
        n, err := r.Read(buf)
        if errors.Is(err, io.EOF) {
            // 已到达文件末尾，停止读取
            return nil
        } else if err != nil {
            return err
        }
        // 处理已读取的数据
    }
}

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