How to Identify Broken Pipe Errors in Go\'s io.Copy?

How to Distinguish Broken Pipe Errors in io.Copy Call

When copying data from a source to a destination using io.Copy, you may encounter a broken pipe error if the remote host abruptly shuts down the connection. To differentiate such errors from others, follow these steps:

1. Import the syscall Package:

<code class="go">import "syscall"</code>

2. Compare Error to Syscall.EPIPE:

Use the equality operator (==) to compare the error obtained from io.Copy to the syscall.EPIPE constant. This constant represents the broken pipe error.

<code class="go">if err == syscall.EPIPE {
    // Ignore the error
}</code>

3. Extract Error Number (Optional):

If you need to obtain the actual error number, use a type assertion to convert the error to a syscall.Errno type.

<code class="go">if e, ok := err.(syscall.Errno); ok {
    errno = uintptr(e)
}</code>

By following these steps, you can effectively filter out broken pipe errors in your io.Copy calls and handle them appropriately, such as ignoring them or taking necessary actions based on the situation.

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