Fix error handling on bad event queue id (zulip). Closes #694

bridge/zulip/zulip.go

@@ -100,7 +100,23 @@ func (b *Bzulip) getChannel(id int) string {
 
 func (b *Bzulip) handleQueue() error {
 	for {
-		messages, _ := b.q.GetEvents()
+		messages, err := b.q.GetEvents()
+		switch err {
+		case gzb.BackoffError:
+			time.Sleep(time.Second * 5)
+		case gzb.BadEventQueueError:
+			b.Log.Info("got a bad event queue id error, reconnecting")
+			b.bot.Queues = nil
+			b.q, err = b.bot.RegisterAll()
+			if err != nil {
+				b.Log.Errorf("reconnecting failed: %s. Sleeping 10 seconds", err)
+				time.Sleep(time.Second * 10)
+				continue
+			}
+			continue
+		default:
+			b.Log.Debugf("receiving error: %#v", err)
+		}
 		for _, m := range messages {
 			b.Log.Debugf("== Receiving %#v", m)
 			// ignore our own messages

go.mod

@@ -25,7 +25,7 @@ require (
 	github.com/lusis/slack-test v0.0.0-20180109053238-3c758769bfa6 // indirect
 	github.com/matterbridge/go-xmpp v0.0.0-20180529212104-cd19799fba91
 	github.com/matterbridge/gomatrix v0.0.0-20190102230110-6f9631ca6dea
-	github.com/matterbridge/gozulipbot v0.0.0-20180507190239-b6bb12d33544
+	github.com/matterbridge/gozulipbot v0.0.0-20190211002717-befe50663a92
 	github.com/matterbridge/logrus-prefixed-formatter v0.0.0-20180806162718-01618749af61
 	github.com/mattermost/mattermost-server v5.5.0+incompatible
 	github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect

go.sum

@@ -70,8 +70,8 @@ github.com/matterbridge/go-xmpp v0.0.0-20180529212104-cd19799fba91 h1:KzDEcy8eDb
 github.com/matterbridge/go-xmpp v0.0.0-20180529212104-cd19799fba91/go.mod h1:ECDRehsR9TYTKCAsRS8/wLeOk6UUqDydw47ln7wG41Q=
 github.com/matterbridge/gomatrix v0.0.0-20190102230110-6f9631ca6dea h1:kaADGqpK4gGO2BpzEyJrBxq2Jc57Rsar4i2EUxcACUc=
 github.com/matterbridge/gomatrix v0.0.0-20190102230110-6f9631ca6dea/go.mod h1:+jWeaaUtXQbBRdKYWfjW6JDDYiI2XXE+3NnTjW5kg8g=
-github.com/matterbridge/gozulipbot v0.0.0-20180507190239-b6bb12d33544 h1:A8lLG3DAu75B5jITHs9z4JBmU6oCq1WiUNnDAmqKCZc=
+github.com/matterbridge/gozulipbot v0.0.0-20190211002717-befe50663a92 h1:4L4vltV2H74Wl+fuwH3xDBe5jvFTn85UXdTqkCPs6Mg=
-github.com/matterbridge/gozulipbot v0.0.0-20180507190239-b6bb12d33544/go.mod h1:yAjnZ34DuDyPHMPHHjOsTk/FefW4JJjoMMCGt/8uuQA=
+github.com/matterbridge/gozulipbot v0.0.0-20190211002717-befe50663a92/go.mod h1:yAjnZ34DuDyPHMPHHjOsTk/FefW4JJjoMMCGt/8uuQA=
 github.com/matterbridge/logrus-prefixed-formatter v0.0.0-20180806162718-01618749af61 h1:R/MgM/eUyRBQx2FiH6JVmXck8PaAuKfe2M1tWIzW7nE=
 github.com/matterbridge/logrus-prefixed-formatter v0.0.0-20180806162718-01618749af61/go.mod h1:iXGEotOvwI1R1SjLxRc+BF5rUORTMtE0iMZBT2lxqAU=
 github.com/mattermost/mattermost-server v5.5.0+incompatible h1:0wcLGgYtd+YImtLDPf2AOfpBHxbU4suATx+6XKw1XbU=

vendor/github.com/matterbridge/gozulipbot/queue.go

@@ -16,6 +16,7 @@ var (
 	HeartbeatError     = fmt.Errorf("EventMessage is a heartbeat")
 	UnauthorizedError  = fmt.Errorf("Request is unauthorized")
 	BackoffError       = fmt.Errorf("Too many requests")
+	BadEventQueueError = fmt.Errorf("BAD_EVENT_QUEUE_ID error")
 	UnknownError       = fmt.Errorf("Error was unknown")
 )
 
@@ -26,6 +27,13 @@ type Queue struct {
 	Bot          *Bot   `json:"-"`
 }
 
+type QueueError struct {
+	Code   string `json:"code"`
+	Msg    string `json:"msg"`
+	ID     string `json:"queue_id"`
+	Result string `json:"result"`
+}
+
 func (q *Queue) EventsChan() (chan EventMessage, func()) {
 	end := false
 	endFunc := func() {
@@ -131,18 +139,22 @@ func (q *Queue) GetEvents() ([]EventMessage, error) {
 	}
 	defer resp.Body.Close()
 
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
 	switch {
 	case resp.StatusCode == 429:
 		return nil, BackoffError
 	case resp.StatusCode == 403:
 		return nil, UnauthorizedError
 	case resp.StatusCode >= 400:
+		qErr, err := q.ParseError(body)
+		if err != nil || qErr == nil {
 			return nil, UnknownError
 		}
-
+		return nil, BadEventQueueError
-	body, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		return nil, err
 	}
 
 	msgs, err := q.ParseEventMessages(body)
@@ -170,6 +182,26 @@ func (q *Queue) RawGetEvents() (*http.Response, error) {
 	return q.Bot.Client.Do(req)
 }
 
+func (q *Queue) ParseError(rawEventResponse []byte) (*QueueError, error) {
+	rawResponse := map[string]json.RawMessage{}
+	err := json.Unmarshal(rawEventResponse, &rawResponse)
+	if err != nil {
+		return nil, err
+	}
+
+	if _, ok := rawResponse["code"]; ok {
+		var qErr QueueError
+		err = json.Unmarshal(rawEventResponse, &qErr)
+		if err != nil {
+			return nil, err
+		}
+		if qErr.Code == "BAD_EVENT_QUEUE_ID" {
+			return &qErr, nil
+		}
+	}
+	return nil, nil
+}
+
 func (q *Queue) ParseEventMessages(rawEventResponse []byte) ([]EventMessage, error) {
 	rawResponse := map[string]json.RawMessage{}
 	err := json.Unmarshal(rawEventResponse, &rawResponse)

vendor/modules.txt

@@ -70,7 +70,7 @@ github.com/magiconair/properties
 github.com/matterbridge/go-xmpp
 # github.com/matterbridge/gomatrix v0.0.0-20190102230110-6f9631ca6dea
 github.com/matterbridge/gomatrix
-# github.com/matterbridge/gozulipbot v0.0.0-20180507190239-b6bb12d33544
+# github.com/matterbridge/gozulipbot v0.0.0-20190211002717-befe50663a92
 github.com/matterbridge/gozulipbot
 # github.com/matterbridge/logrus-prefixed-formatter v0.0.0-20180806162718-01618749af61
 github.com/matterbridge/logrus-prefixed-formatter