How Can I Implement HTTP Connection Reuse in Go to Avoid Creating Numerous Concurrent Connections?

HTTP Connection Reuse in Go

Question:

In Go, despite employing a transport and client for making HTTP posts, each post to the same endpoint creates a new connection, resulting in numerous concurrent connections. How can connection reuse be implemented in such situations?

Answer:

To effectively reuse connections, ensure that the response is read until completion and the Close() method of the response body is called. Here's a revised code snippet that demonstrates this:

res, _ := client.Do(req)
io.Copy(ioutil.Discard, res.Body)
res.Body.Close()

Key Considerations for Connection Reuse:

• Full Response Reading: The response must be completely read (e.g., using ioutil.ReadAll(resp.Body)) to signal the connection's availability for reuse.
• Calling Body.Close(): The Close() method of the response body must be called to release resources and allow the connection to be reused.

By following these steps, Go applications can effectively reuse HTTP connections, reducing network overhead and improving performance.

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