Fix recovery middleware to render gitea style page. (#13857)

* Some changes to fix recovery

* Move Recovery to middlewares

* Remove trace code

* Fix lint

* add session middleware and remove dependent on macaron for sso

* Fix panic 500 page rendering

* Fix bugs

* Fix fmt

* Fix vendor

* recover unnecessary change

* Fix lint and addd some comments about the copied codes.

* Use util.StatDir instead of com.StatDir

Co-authored-by: 6543 <6543@obermui.de>

vendor/github.com/couchbase/gomemcached/client/upr_feed.go

@@ -26,6 +26,7 @@ const opaqueOpen = 0xBEAF0001
 const opaqueFailover = 0xDEADBEEF
 const opaqueGetSeqno = 0xDEADBEEF
 const uprDefaultNoopInterval = 120
+const dcpOsoExtraLen = 4
 
 // Counter on top of opaqueOpen that others can draw from for open and control msgs
 var opaqueOpenCtrlWell uint32 = opaqueOpen
@@ -117,6 +118,7 @@ type UprFeatures struct {
 	DcpPriority         PriorityType
 	EnableExpiry        bool
 	EnableStreamId      bool
+	EnableOso           bool
 }
 
 /**
@@ -601,6 +603,20 @@ func (feed *UprFeed) uprOpen(name string, sequence uint32, bufSize uint32, featu
 		activatedFeatures.EnableStreamId = true
 	}
 
+	if features.EnableOso {
+		rq := &gomemcached.MCRequest{
+			Opcode: gomemcached.UPR_CONTROL,
+			Key:    []byte("enable_out_of_order_snapshots"),
+			Body:   []byte("true"),
+			Opaque: getUprOpenCtrlOpaque(),
+		}
+		err = sendMcRequestSync(feed.conn, rq)
+		if err != nil {
+			return
+		}
+		activatedFeatures.EnableOso = true
+	}
+
 	// everything is ok so far, set upr feed to open state
 	feed.activatedFeatures = activatedFeatures
 	feed.setOpen()
@@ -976,6 +992,12 @@ loop:
 						break loop
 					}
 					event = makeUprEvent(pkt, stream, bytes)
+				case gomemcached.DCP_OSO_SNAPSHOT:
+					if stream == nil {
+						logging.Infof("Stream not found for vb %d: %#v", vb, pkt)
+						break loop
+					}
+					event = makeUprEvent(pkt, stream, bytes)
 				default:
 					logging.Infof("Recived an unknown response for vbucket %d", vb)
 				}