83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
package line
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import (
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"encoding/json"
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"io"
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"net/http"
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"github.com/gochat/gochat/internal/model"
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applogger "github.com/gochat/gochat/pkg/logger"
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)
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// WebhookHandler handles LINE webhook HTTP requests.
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type WebhookHandler struct {
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pipeline *IncomingProcessor
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service *LineService
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}
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// NewWebhookHandler creates a LINE webhook handler.
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func NewWebhookHandler(pipeline *IncomingProcessor, service *LineService) *WebhookHandler {
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return &WebhookHandler{
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pipeline: pipeline,
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service: service,
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}
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}
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// HandleWebhook processes an incoming LINE webhook HTTP request.
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func (h *WebhookHandler) HandleWebhook(w http.ResponseWriter, r *http.Request, inbox *model.Inbox) {
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// Read request body for signature verification
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body, err := io.ReadAll(r.Body)
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if err != nil {
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applogger.L().Errorf("LINE HandleWebhook: failed to read body: %v", err)
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http.Error(w, "Failed to read request body", http.StatusBadRequest)
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return
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}
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defer r.Body.Close()
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// Verify webhook signature
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config := parseInboxConfig(inbox.ChannelConfig)
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channelSecret := configStr(config, "channel_secret", "")
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signature := r.Header.Get("X-Line-Signature")
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if channelSecret != "" && signature != "" {
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if !h.service.VerifySignature(channelSecret, string(body), signature) {
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applogger.L().Warnf("LINE HandleWebhook: invalid signature for inbox=%d", inbox.ID)
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http.Error(w, "Invalid signature", http.StatusUnauthorized)
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return
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}
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}
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// Parse webhook event
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var webhookEvent WebhookEvent
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if err := json.Unmarshal(body, &webhookEvent); err != nil {
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applogger.L().Errorf("LINE HandleWebhook: failed to parse JSON: %v", err)
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http.Error(w, "Invalid JSON", http.StatusBadRequest)
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return
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}
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// Process each event
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for _, event := range webhookEvent.Events {
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ctx := r.Context()
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incomingMsg, err := h.pipeline.ProcessEvent(ctx, inbox, event)
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if err != nil {
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applogger.L().Errorf("LINE HandleWebhook: process event failed: %v", err)
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continue
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}
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if incomingMsg == nil {
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continue // unhandled event type
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}
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// Log processed event
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applogger.L().Debugf("LINE HandleWebhook: processed event type=%s sender=%s",
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event.Type, incomingMsg.SenderID)
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}
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w.WriteHeader(http.StatusOK)
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}
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// HandleWebhookVerification responds to LINE webhook URL verification requests.
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func (h *WebhookHandler) HandleWebhookVerification(w http.ResponseWriter, r *http.Request) {
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// LINE webhook verification is handled during the initial setup
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// The verification endpoint returns a 200 OK to confirm the webhook URL
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w.WriteHeader(http.StatusOK)
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} |