How to Retrieve User IP Address in Google App Engine Golang for reCAPTCHA Verification?

Retrieving User IP Address in Google App Engine Golang

Integrating reCAPTCHA into a GAE Golang web application requires obtaining the user's IP address for verification. This article outlines a practical solution for fetching the IP address from a form post.

The method involves utilizing the net.SplitHostPort function to extract the IP address from the r.RemoteAddr field. After splitting the string, the IP address is stored in the ip variable.

Here's an example of how it can be implemented in your code:

<code class="go">import "net"

func getIP(w http.ResponseWriter, r *http.Request) {
    ip, _, _ := net.SplitHostPort(r.RemoteAddr)
    // Use the ip variable for reCAPTCHA verification or other purposes.
}</code>

By incorporating this approach, you can effectively retrieve the user's IP address and perform the necessary reCAPTCHA verification or other tasks that require this information in your GAE Golang application.

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