Setting Headers for HTTP Requests using http.Client and http.Transport

In the context of making HTTP requests using custom network configurations, there may be a need to set specific headers on the request. In this case, the headers can be set when creating a new HTTP request using http.NewRequest.

Once a request has been created, you can set headers by using the req.Header object, where req is your HTTP request object. Specific header values can be set using the Set method, such as req.Header.Set("name", "value").

Now, to execute the request with the custom header settings while also using a specific network interface and transport configuration:

req, err := http.NewRequest("GET", "https://www.whatismyip.com/", nil)
if err != nil {
    // handle error
}

req.Header.Set("name", "value")

resp, err := client.Do(req)
if err != nil {
    // handle error
}

// Handle response as per the provided sample code