First commit

captcha.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/url"
+	"os"
+)
+
+type CaptchaResponse struct {
+	Success bool `json:"success"`
+}
+
+func ValidateCaptcha(captcha string) bool {
+	secretKey := os.Getenv("CAPTCHA_SERVER_KEY")
+	if secretKey == "" {
+		return true // Skip validation if CAPTCHA is disabled
+	}
+
+	resp, err := http.PostForm("https://www.google.com/recaptcha/api/siteverify", url.Values{
+		"secret":   {secretKey},
+		"response": {captcha},
+	})
+	if err != nil {
+		return false
+	}
+	defer resp.Body.Close()
+
+	var result CaptchaResponse
+	err = json.NewDecoder(resp.Body).Decode(&result)
+	return err == nil && result.Success
+}