Here are a few title options that fit the question-and-answer format: * **Why Is My Go HTTP Connection Not Closing When the User Terminates the Download?** * **How Do I Gracefully Close HTTP Connecti

Troubleshooting HTTP Connection Closures in Go

In a program that downloads a file from a server and returns it to the user, it's crucial to maintain connection integrity. When the user stops the download or terminates the connection, the GET connection should be terminated as well. However, as observed through usage graphing, this is not occurring.

Closing the HTTP Connection

To resolve this issue, it's essential to close the Body of the request in all circumstances. Here's how to do it:

<code class="go">resp, httpErr := http.Get(url.String())
if httpErr != nil {
    // Handle error
    return
}
// If there's no error, defer the call for closing the body
defer resp.Body.Close()</code>

Deferring the closing of the Body ensures that it will be executed even when an error occurs. Additionally, io.Copy provides information on the success of the copy operation. You can check this by using the following code:

<code class="go">written, err := io.Copy(w, resp.Body)
if err != nil {
    // Copy did not succeed
}</code>

By closing the connection gracefully and checking the result of io.Copy, you can ensure that the HTTP connection is terminated when the user closes the download or connection.

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