Sleep webseed peers after unhandled errors

peer-impl.go

@@ -26,7 +26,7 @@ type peerImpl interface {
 	// Rebuke the peer
 	ban()
 	String() string
-	connStatusString() string
+	peerImplStatusLines() []string
 
 	// All if the peer should have everything, known if we know that for a fact. For example, we can
 	// guess at how many pieces are in a torrent, and assume they have all pieces based on them

peerconn.go

@@ -171,8 +171,8 @@ type PeerConn struct {
 	peerSentHaveAll bool
 }
 
-func (cn *PeerConn) connStatusString() string {
-	return fmt.Sprintf("%+-55q %s %s", cn.PeerID, cn.PeerExtensionBytes, cn.connString)
+func (cn *PeerConn) peerImplStatusLines() []string {
+	return []string{fmt.Sprintf("%+-55q %s %s", cn.PeerID, cn.PeerExtensionBytes, cn.connString)}
 }
 
 func (cn *Peer) updateExpectingChunks() {
@@ -389,7 +389,7 @@ func (cn *Peer) writeStatus(w io.Writer, t *Torrent) {
 	if cn.closed.IsSet() {
 		fmt.Fprint(w, "CLOSED: ")
 	}
-	fmt.Fprintln(w, cn.connStatusString())
+	fmt.Fprintln(w, strings.Join(cn.peerImplStatusLines(), "\n"))
 	prio, err := cn.peerPriority()
 	prioStr := fmt.Sprintf("%08x", prio)
 	if err != nil {

torrent.go

@@ -770,9 +770,14 @@ func (t *Torrent) writeStatus(w io.Writer) {
 		}
 		return worseConn(i, j)
 	})
+	var buf bytes.Buffer
 	for i, c := range peers {
 		fmt.Fprintf(w, "%2d. ", i+1)
-		c.writeStatus(w, t)
+		buf.Reset()
+		c.writeStatus(&buf, t)
+		w.Write(bytes.TrimRight(
+			bytes.ReplaceAll(buf.Bytes(), []byte("\n"), []byte("\n    ")),
+			" "))
 	}
 }
 
@@ -2425,7 +2430,6 @@ func (t *Torrent) addWebSeed(url string, opts ...AddWebSeedsOpt) {
 			},
 		},
 		activeRequests: make(map[Request]webseed.Request, maxRequests),
-		maxRequests:    maxRequests,
 	}
 	ws.peer.initRequestState()
 	for _, opt := range opts {

webseed-peer.go

@@ -16,20 +16,27 @@ import (
 	"github.com/anacrolix/torrent/webseed"
 )
 
+const (
+	webseedPeerUnhandledErrorSleep   = 5 * time.Second
+	webseedPeerCloseOnUnhandledError = false
+)
+
 type webseedPeer struct {
 	// First field for stats alignment.
 	peer             Peer
 	client           webseed.Client
 	activeRequests   map[Request]webseed.Request
 	requesterCond    sync.Cond
-	// Number of requester routines.
-	maxRequests int
+	lastUnhandledErr time.Time
 }
 
 var _ peerImpl = (*webseedPeer)(nil)
 
-func (me *webseedPeer) connStatusString() string {
-	return me.client.Url
+func (me *webseedPeer) peerImplStatusLines() []string {
+	return []string{
+		me.client.Url,
+		fmt.Sprintf("last unhandled error: %v", eventAgeString(me.lastUnhandledErr)),
+	}
 }
 
 func (ws *webseedPeer) String() string {
@@ -86,6 +93,7 @@ func (ws *webseedPeer) requester(i int) {
 	defer ws.requesterCond.L.Unlock()
 start:
 	for !ws.peer.closed.IsSet() {
+		// Restart is set if we don't need to wait for the requestCond before trying again.
 		restart := false
 		ws.peer.requestState.Requests.Iterate(func(x RequestIndex) bool {
 			r := ws.peer.t.requestIndexToRequest(x)
@@ -101,6 +109,7 @@ start:
 			if errors.Is(err, webseed.ErrTooFast) {
 				time.Sleep(time.Duration(rand.Int63n(int64(10 * time.Second))))
 			}
+			time.Sleep(time.Until(ws.lastUnhandledErr.Add(webseedPeerUnhandledErrorSleep)))
 			ws.requesterCond.L.Lock()
 			return false
 		})
@@ -172,8 +181,13 @@ func (ws *webseedPeer) requestResultHandler(r Request, webseedRequest webseed.Re
 			// cfg := spew.NewDefaultConfig()
 			// cfg.DisableMethods = true
 			// cfg.Dump(result.Err)
+
+			if webseedPeerCloseOnUnhandledError {
 				log.Printf("closing %v", ws)
 				ws.peer.close()
+			} else {
+				ws.lastUnhandledErr = time.Now()
+			}
 		}
 		if !ws.peer.remoteRejectedRequest(ws.peer.t.requestIndexFromRequest(r)) {
 			panic("invalid reject")