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af9986c0f8
Add google recaptcha as an initial page before creating any session. To configure recaptcha there are 2 environment variables that are needed `GOOGLE_RECAPTCHA_SITE_KEY` and `GOOGLE_RECAPTCHA_SITE_SECRET`. The code contains development defaults that should be set in production to real values. **NOTICE: Development defaults assume that the domain is `localhost`**
60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
package services
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import (
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"encoding/json"
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"log"
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"net/http"
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"net/url"
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"os"
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"strings"
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)
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func GetGoogleRecaptchaSiteKey() string {
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key := os.Getenv("GOOGLE_RECAPTCHA_SITE_KEY")
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if key == "" {
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// This is a development default. The environment variable should always be set in production.
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key = "6LeY_QsUAAAAAOlpVw4MhoLEr50h-dM80oz6M2AX"
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}
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return key
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}
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func GetGoogleRecaptchaSiteSecret() string {
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key := os.Getenv("GOOGLE_RECAPTCHA_SITE_SECRET")
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if key == "" {
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// This is a development default. The environment variable should always be set in production.
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key = "6LeY_QsUAAAAAHIALCtm0GKfk-UhtXoyJKarnRV8"
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}
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return key
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}
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type recaptchaResponse struct {
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Success bool `json:"success"`
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}
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func IsHuman(req *http.Request) bool {
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req.ParseForm()
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challenge := req.Form.Get("g-recaptcha-response")
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// Of X-Forwarded-For exists, it means we are behind a loadbalancer and we should use the real IP address of the user
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ip := req.Header.Get("X-Forwarded-For")
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if ip == "" {
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// Use the standard remote IP address of the request
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ip = req.RemoteAddr
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}
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parts := strings.Split(ip, ":")
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resp, postErr := http.PostForm("https://www.google.com/recaptcha/api/siteverify", url.Values{"secret": {GetGoogleRecaptchaSiteSecret()}, "response": {challenge}, "remoteip": {parts[0]}})
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if postErr != nil {
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log.Println(postErr)
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// If there is a problem to connect to google, assume the user is a human so we don't block real users because of technical issues
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return true
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}
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var r recaptchaResponse
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json.NewDecoder(resp.Body).Decode(&r)
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return r.Success
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}
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