What is your experience in implementing synchronous data exchanges between servers?

Synchronous data exchange between servers is usually implemented through blocking calls, where the client waits for a response from the server before continuing.

In my experience with Go, the standard net/http package is often used for this purpose with the http.Client.Do(req) call, which blocks execution until a response is received.

Example of a simple synchronous request:

resp, err := http.Get("https://example.com/api/data")
if err != nil {
    // handle error
}
defer resp.Body.Close()

body, err := ioutil.ReadAll(resp.Body)
if err != nil {
    // handle error
}

// Use the received data
fmt.Println(string(body))

This approach is suitable when you need to get data and process it immediately, without moving to the next step until the exchange is complete.

For more complex scenarios, TCP sockets or RPC can be used, but the essence of synchronous exchange is a blocking call that waits for a response from another server.