nats compatibility + handle produce/consume from old sdk to new station

server/memphis_handlers_consumers.go

@@ -165,6 +165,12 @@ func (s *Server) createConsumerDirectCommon(c *client, consumerName, cStationNam
 				analytics.SendEvent(user.TenantName, user.Username, analyticsParams, "user-create-station-sdk")
 			}
 		}
+	} else {
+		if version < 2 {
+			err := errors.New("To consume from this station please upgrade your SDK version")
+			serv.Warnf("[tenant: %v]createConsumerDirectCommon at CreateDefaultStation: Consumer %v at station %v : %v", tenantName, consumerName, cStationName, err.Error())
+			return []int{}, err
+		}
 	}
 
 	consumerGroupExist, consumerFromGroup, err := isConsumerGroupExist(consumerGroup, station.ID)

server/memphis_handlers_dls_messages.go

@@ -94,14 +94,8 @@ func (s *Server) handleNewUnackedMsg(msg []byte) error {
 	poisonedCgs := []string{}
 	if station.IsNative {
 		producedByHeader = headersJson["$memphis_producedBy"]
-
-		// This check for backward compatability
 		if producedByHeader == "" {
-			producedByHeader = headersJson["producedBy"]
-			if producedByHeader == "" {
-				serv.Warnf("handleNewUnackedMsg: Error while getting notified about a poison message: Missing mandatory message headers, please upgrade the SDK version you are using")
-				return nil
-			}
+			producedByHeader = "unknown"
 		}
 
 		if producedByHeader == "$memphis_dls" { // skip poison messages which have been resent

server/memphis_handlers_producers.go

@@ -109,6 +109,12 @@ func (s *Server) createProducerDirectCommon(c *client, pName, pType, pConnection
 				analytics.SendEvent(user.TenantName, user.Username, analyticsParams, "user-create-station-sdk")
 			}
 		}
+	} else {
+		if version < 2 {
+			err := errors.New("To produce to this station please upgrade your SDK version")
+			serv.Warnf("[tenant: %v]createProducerDirectCommon : Producer %v at station %v : %v", user.TenantName, pName, pStationName, err.Error())
+			return false, false, err, models.Station{}
+		}
 	}
 
 	newProducer, err := db.InsertNewProducer(name, station.ID, producerType, pConnectionId, station.TenantName, station.PartitionsList)

server/memphis_handlers_stations.go

@@ -175,15 +175,15 @@ func (s *Server) createStationDirectIntern(c *client,
 	jsApiResp := JSApiStreamCreateResponse{ApiResponse: ApiResponse{Type: JSApiStreamCreateResponseType}}
 	memphisGlobalAcc := s.MemphisGlobalAccount()
 
-	if csr.PartitionsNumber == 0 {
+	if csr.PartitionsNumber == 0 && isNative {
 		errMsg := fmt.Errorf("you are using an old SDK, make sure to update your SDK")
 		serv.Warnf("[tenant: %v][user:%v]createStationDirect -  tried to use an old SDK", csr.TenantName, csr.Username)
 		jsApiResp.Error = NewJSStreamCreateError(errMsg)
 		respondWithErrOrJsApiRespWithEcho(!isNative, c, memphisGlobalAcc, _EMPTY_, reply, _EMPTY_, jsApiResp, errMsg)
 		return
 	}
 
-	if csr.PartitionsNumber > MAX_PARTITIONS || csr.PartitionsNumber < 1 {
+	if (csr.PartitionsNumber > MAX_PARTITIONS || csr.PartitionsNumber < 1) && isNative {
 		errMsg := fmt.Errorf("cannot create station with %v partitions (max:%v min:1): Station -  %v, ", csr.PartitionsNumber, MAX_PARTITIONS, csr.StationName)
 		serv.Warnf("[tenant: %v][user:%v]createStationDirect %v", csr.TenantName, csr.Username, errMsg)
 		jsApiResp.Error = NewJSStreamCreateError(errMsg)
@@ -1552,7 +1552,7 @@ func (sh StationsHandler) GetMessageDetails(c *gin.Context) {
 				Headers:  headersJson,
 			},
 			Producer: models.ProducerDetailsResp{
-				Name:     "",
+				Name:     "unknown",
 				IsActive: false,
 			},
 			PoisonedCgs: []models.PoisonedCg{},
@@ -1570,17 +1570,6 @@ func (sh StationsHandler) GetMessageDetails(c *gin.Context) {
 		}
 	}
 
-	// This check for backward compatability
-	if connectionIdHeader == "" || producedByHeader == "" {
-		connectionIdHeader = headersJson["connectionId"]
-		producedByHeader = strings.ToLower(headersJson["producedBy"])
-		if connectionIdHeader == "" || producedByHeader == "" {
-			serv.Warnf("[tenant: %v][user: %v]GetMessageDetails: missing mandatory message headers, please upgrade the SDK version you are using", user.TenantName, user.Username)
-			c.AbortWithStatusJSON(SHOWABLE_ERROR_STATUS_CODE, gin.H{"message": "missing mandatory message headers, please upgrade the SDK version you are using"})
-			return
-		}
-	}
-
 	connectionId := connectionIdHeader
 	poisonedCgs := make([]models.PoisonedCg, 0)
 	// Only native stations have CGs
@@ -1601,6 +1590,10 @@ func (sh StationsHandler) GetMessageDetails(c *gin.Context) {
 	}
 	if exist {
 		isActive = producer.IsActive
+	} else {
+		if producedByHeader == "" {
+			producedByHeader = "unknown"
+		}
 	}
 
 	msg := models.MessageResponse{

server/memphis_helper.go

@@ -1070,14 +1070,6 @@ func (s *Server) GetMessagesFromPartition(station models.Station, streamName str
 			connectionIdHeader := headersJson["$memphis_connectionId"]
 			producedByHeader := strings.ToLower(headersJson["$memphis_producedBy"])
 
-			// This check for backward compatability
-			if connectionIdHeader == "" || producedByHeader == "" {
-				connectionIdHeader = headersJson["connectionId"]
-				producedByHeader = strings.ToLower(headersJson["producedBy"])
-				if connectionIdHeader == "" || producedByHeader == "" {
-					return []models.MessageDetails{}, errors.New("missing mandatory message headers, please upgrade the SDK version you are using")
-				}
-			}
 
 			for header := range headersJson {
 				if strings.HasPrefix(header, "$memphis") {

server/memphis_jsapi_wrappers.go

@@ -15,6 +15,7 @@ import (
 	"encoding/json"
 	"errors"
 	"memphis/models"
+	"regexp"
 	"strings"
 	"time"
 )
@@ -176,11 +177,13 @@ func (s *Server) memphisJSApiWrapStreamCreate(sub *subscription, c *client, _ *A
 		return
 	}
 
-	if len(cfg.Name) > 32 {
-		resp.Error = NewJSStreamCreateError(errors.New("stream name can not be greater than 32 characters"))
+	streamName, err := validateStreamName(cfg.Name)
+	if err != nil {
+		resp.Error = NewJSStreamCreateError(err)
 		s.sendAPIErrResponse(ci, acc, subject, reply, string(msg), s.jsonResponse(&resp))
 		return
 	}
+	cfg.Name = streamName
 
 	go memphisCreateNonNativeStationIfNeeded(s, reply, cfg, c)
 
@@ -192,3 +195,37 @@ func (s *Server) memphisJSApiWrapStreamDelete(sub *subscription, c *client, acc
 
 	s.jsStreamDeleteRequestIntern(sub, c, acc, subject, reply, rmsg)
 }
+
+func validateStreamName(streamName string) (string, error) {
+	name := strings.ToLower(streamName)
+	emptyErrStr := "stream name can not be empty"
+	tooLongErrStr := "stream name should be under 128 characters"
+	invalidCharErrStr := "only alphanumeric and the '_', '-' characters are allowed in stream name"
+	firstLetterErrStr := "stream name can not start or end with non alphanumeric character"
+
+	emptyErr := errors.New(emptyErrStr)
+	tooLongErr := errors.New(tooLongErrStr)
+	invalidCharErr := errors.New(invalidCharErrStr)
+	firstLetterErr := errors.New(firstLetterErrStr)
+
+	if len(name) == 0 {
+		return "", emptyErr
+	}
+
+	if len(name) > 128 {
+		return "", tooLongErr
+	}
+
+	re := regexp.MustCompile("^[a-z0-9_-]*$")
+
+	validName := re.MatchString(name)
+	if !validName {
+		return "", invalidCharErr
+	}
+
+	if name[0:1] == "-" || name[0:1] == "_" || name[len(name)-1:] == "." || name[len(name)-1:] == "-" || name[len(name)-1:] == "_" {
+		return "", firstLetterErr
+	}
+
+	return name, nil
+}