76 lines
1.4 KiB
Go
76 lines
1.4 KiB
Go
package captcha
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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"strings"
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"time"
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)
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const (
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rootURL = "https://hcaptcha.com/siteverify"
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)
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type captchaResp struct {
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Success bool `json:"success"`
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ErrorCodes []string `json:"error_codes"`
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}
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// Captcha is a simple Captcha client.
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// It currently implements hcaptcha.com
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type Captcha struct {
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o Opt
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client *http.Client
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}
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type Opt struct {
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CaptchaSecret string `json:"captcha_secret"`
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}
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// New returns a new instance of the HTTP CAPTCHA client.
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func New(o Opt) *Captcha {
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timeout := time.Second * 5
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return &Captcha{
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o: o,
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client: &http.Client{
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Timeout: timeout,
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Transport: &http.Transport{
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MaxIdleConnsPerHost: 10,
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MaxConnsPerHost: 100,
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ResponseHeaderTimeout: timeout,
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IdleConnTimeout: timeout,
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},
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}}
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}
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// Verify verifies a CAPTCHA request.
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func (c *Captcha) Verify(token string) (error, bool) {
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resp, err := c.client.PostForm(rootURL, url.Values{
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"secret": {c.o.CaptchaSecret},
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"response": {token},
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})
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if err != nil {
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return err, false
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return err, false
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}
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var r captchaResp
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if json.Unmarshal(body, &r); err != nil {
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return err, true
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}
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if r.Success != true {
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return fmt.Errorf("captcha failed: %s", strings.Join(r.ErrorCodes, ",")), false
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}
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return nil, true
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}
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