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// Google re-captcha package tweaked from http://github.com/haisum/recaptcha
package recaptcha
import (
"encoding/json"
"io/ioutil"
"net/http"
"net/url"
"time"
)
// R type represents an object of Recaptcha and has public property Secret,
// which is secret obtained from google recaptcha tool admin interface
type R struct {
URL string
Secret string
lastError []string
}
// Struct for parsing json in google's response
type googleResponse struct {
Success bool
ErrorCodes []string `json:"error-codes"`
}
// VerifyResponse is a method similar to `Verify`; but doesn't parse the form for you. Useful if
// you're receiving the data as a JSON object from a javascript app or similar.
func (r *R) VerifyResponse(response string) bool {
r.lastError = make([]string, 1)
client := &http.Client{Timeout: 20 * time.Second}
resp, err := client.PostForm(r.URL,
url.Values{"secret": {r.Secret}, "response": {response}})
if err != nil {
r.lastError = append(r.lastError, err.Error())
return false
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
r.lastError = append(r.lastError, err.Error())
return false
}
gr := new(googleResponse)
err = json.Unmarshal(body, gr)
if err != nil {
r.lastError = append(r.lastError, err.Error())
return false
}
if !gr.Success {
r.lastError = append(r.lastError, gr.ErrorCodes...)
}
return gr.Success
}
// LastError returns errors occurred in last re-captcha validation attempt
func (r R) LastError() []string {
return r.lastError
}
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