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- // Copyright 2018 The Gitea Authors. All rights reserved.
- // SPDX-License-Identifier: MIT
-
- package recaptcha
-
- import (
- "context"
- "fmt"
- "io"
- "net/http"
- "net/url"
- "strings"
-
- "code.gitea.io/gitea/modules/json"
- "code.gitea.io/gitea/modules/setting"
- "code.gitea.io/gitea/modules/util"
- )
-
- // Response is the structure of JSON returned from API
- type Response struct {
- Success bool `json:"success"`
- ChallengeTS string `json:"challenge_ts"`
- Hostname string `json:"hostname"`
- ErrorCodes []ErrorCode `json:"error-codes"`
- }
-
- const apiURL = "api/siteverify"
-
- // Verify calls Google Recaptcha API to verify token
- func Verify(ctx context.Context, response string) (bool, error) {
- post := url.Values{
- "secret": {setting.Service.RecaptchaSecret},
- "response": {response},
- }
- // Basically a copy of http.PostForm, but with a context
- req, err := http.NewRequestWithContext(ctx, http.MethodPost,
- util.URLJoin(setting.Service.RecaptchaURL, apiURL), strings.NewReader(post.Encode()))
- if err != nil {
- return false, fmt.Errorf("Failed to create CAPTCHA request: %w", err)
- }
- req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
-
- resp, err := http.DefaultClient.Do(req)
- if err != nil {
- return false, fmt.Errorf("Failed to send CAPTCHA response: %s", err)
- }
- defer resp.Body.Close()
- body, err := io.ReadAll(resp.Body)
- if err != nil {
- return false, fmt.Errorf("Failed to read CAPTCHA response: %s", err)
- }
-
- var jsonResponse Response
- err = json.Unmarshal(body, &jsonResponse)
- if err != nil {
- return false, fmt.Errorf("Failed to parse CAPTCHA response: %s", err)
- }
- var respErr error
- if len(jsonResponse.ErrorCodes) > 0 {
- respErr = jsonResponse.ErrorCodes[0]
- }
- return jsonResponse.Success, respErr
- }
-
- // ErrorCode is a reCaptcha error
- type ErrorCode string
-
- // String fulfills the Stringer interface
- func (e ErrorCode) String() string {
- switch e {
- case "missing-input-secret":
- return "The secret parameter is missing."
- case "invalid-input-secret":
- return "The secret parameter is invalid or malformed."
- case "missing-input-response":
- return "The response parameter is missing."
- case "invalid-input-response":
- return "The response parameter is invalid or malformed."
- case "bad-request":
- return "The request is invalid or malformed."
- case "timeout-or-duplicate":
- return "The response is no longer valid: either is too old or has been used previously."
- }
- return string(e)
- }
-
- // Error fulfills the error interface
- func (e ErrorCode) Error() string {
- return e.String()
- }
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