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package validators |
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import ( |
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"bytes" |
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"context" |
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"encoding/json" |
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"fmt" |
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"io" |
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"net/http" |
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"time" |
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"github.com/NdoleStudio/httpsms/pkg/telemetry" |
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"github.com/palantir/stacktrace" |
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) |
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// TurnstileTokenValidator validates the token used to validate captchas from cloudflare |
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type TurnstileTokenValidator struct { |
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logger telemetry.Logger |
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tracer telemetry.Tracer |
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secretKey string |
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httpClient *http.Client |
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} |
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type turnstileVerifyResponse struct { |
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Success bool `json:"success"` |
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ChallengeTs time.Time `json:"challenge_ts"` |
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Hostname string `json:"hostname"` |
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ErrorCodes []any `json:"error-codes"` |
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Action string `json:"action"` |
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Cdata string `json:"cdata"` |
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Metadata struct { |
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EphemeralID string `json:"ephemeral_id"` |
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} `json:"metadata"` |
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} |
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// NewTurnstileTokenValidator creates a new TurnstileTokenValidator |
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func NewTurnstileTokenValidator(logger telemetry.Logger, tracer telemetry.Tracer, secretKey string, httpClient *http.Client) *TurnstileTokenValidator { |
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return &TurnstileTokenValidator{ |
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logger.WithService(fmt.Sprintf("%T", &TurnstileTokenValidator{})), |
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tracer, |
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secretKey, |
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httpClient, |
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} |
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} |
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// ValidateToken validates the cloudflare turnstile token |
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// https://developers.cloudflare.com/turnstile/get-started/server-side-validation/ |
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func (v *TurnstileTokenValidator) ValidateToken(ctx context.Context, ipAddress, token string) bool { |
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ctx, span, ctxLogger := v.tracer.StartWithLogger(ctx, v.logger) |
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defer span.End() |
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payload, err := json.Marshal(map[string]string{ |
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"secret": v.secretKey, |
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"response": token, |
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"remoteip": ipAddress, |
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}) |
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if err != nil { |
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ctxLogger.Error(stacktrace.Propagate(err, "failed to marshal payload")) |
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return false |
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} |
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request, err := http.NewRequestWithContext(ctx, http.MethodPost, "https://challenges.cloudflare.com/turnstile/v0/siteverify", bytes.NewBuffer(payload)) |
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if err != nil { |
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ctxLogger.Error(stacktrace.Propagate(err, "failed to create http request request")) |
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return false |
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} |
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request.Header.Set("Content-Type", "application/json") |
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response, err := v.httpClient.Do(request) |
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if err != nil { |
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ctxLogger.Error(stacktrace.Propagate(err, fmt.Sprintf("failed to send http request to [%s]", request.URL.String()))) |
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return false |
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} |
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defer response.Body.Close() |
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body, err := io.ReadAll(response.Body) |
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if err != nil { |
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ctxLogger.Error(stacktrace.Propagate(err, "failed to read response body from cloudflare turnstile")) |
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return false |
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} |
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ctxLogger.Info(fmt.Sprintf("successfully validated token with cloudflare with response [%s]", body)) |
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data := new(turnstileVerifyResponse) |
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if err = json.Unmarshal(body, data); err != nil { |
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ctxLogger.Error(stacktrace.Propagate(err, "failed to unmarshal response from cloudflare turnstile")) |
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return false |
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} |
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return data.Success |
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} |
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NdoleStudio /
httpsms
