How Do I Prevent Automatic Redirects in Go's HTTP Client?

Disabling Automatic Redirect Handling in Go HTTP Client

The Go HTTP client automatically follows HTTP redirects, which can be inconvenient in certain situations. To disable this behavior, the CheckRedirect function of the http.Client can be overridden.

One common approach is to define a custom CheckRedirect function that always returns an error. However, this requires treating HTTP redirects as errors, which can lead to unnecessary error handling.

An alternative solution is to use the ErrUseLastResponse constant as the return value in the CheckRedirect function. This instructs the HTTP client to use the most recent response without following any redirects.

Here's an example of how to use this approach:

client := &http.Client{
    CheckRedirect: func(req *http.Request, via []*http.Request) error {
        return http.ErrUseLastResponse
    },
}

With this configuration, the HTTP client will not follow redirects and will return the most recent response, allowing access to the HTTP Location header for further processing. This approach avoids the need for error handling and provides a more direct way to control redirect behavior.

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