Update internal dependencies

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

go.mod

@@ -1,11 +1,27 @@
 module github.com/openfaas/nats-queue-worker
 
-go 1.16
+go 1.18
 
 require (
+	github.com/nats-io/stan.go v0.10.4
+	github.com/openfaas/faas-provider v0.19.1
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/nats-io/nats-server/v2 v2.3.2 // indirect
-	github.com/nats-io/nats-streaming-server v0.22.0 // indirect
-	github.com/nats-io/stan.go v0.9.0
-	github.com/openfaas/faas-provider v0.18.6
+	github.com/gorilla/mux v1.8.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/nats-io/nats.go v1.22.1 // indirect
+	github.com/nats-io/nkeys v0.3.0 // indirect
+	github.com/nats-io/nuid v1.0.1 // indirect
+	github.com/prometheus/client_golang v1.12.2 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.32.1 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
+	golang.org/x/sys v0.4.0 // indirect
+	google.golang.org/protobuf v1.26.0 // indirect
 )

handler/handler.go

@@ -8,7 +8,8 @@ import (
 
 const sharedQueue = "faas-request"
 
-// CreateNATSQueue ready for asynchronous processing
+// CreateNATSQueue ready for asynchronous message processing of paylods of
+// up to a maximum of 256KB in size.
 func CreateNATSQueue(address string, port int, clusterName, channel string, clientConfig NATSConfig) (*NATSQueue, error) {
 	var err error
 	natsURL := fmt.Sprintf("nats://%s:%d", address, port)

handler/nats_queue.go

@@ -2,6 +2,7 @@ package handler
 
 import (
 	"encoding/json"
+	"fmt"
 	"log"
 	"sync"
 	"time"
@@ -37,6 +38,10 @@ func (q *NATSQueue) Queue(req *ftypes.QueueRequest) error {
 	if v := req.Header.Get("X-Call-Id"); len(v) > 0 {
 		callId = v
 	}
+	max := 256 * 1000
+	if len(req.Body) > max {
+		return fmt.Errorf("request body too large for OpenFaaS CE (%d bytes), maximum: %d bytes", len(req.Body), 256*1000)
+	}
 
 	log.Printf("[%s] Queueing (%d) bytes for: %s.\n", callId, len(req.Body), req.Function)
 

main.go

@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"net"
 	"net/http"
@@ -40,6 +39,8 @@ func main() {
 	log.Printf("Starting queue-worker (Community Edition). Concurrency: %d\tChannel: %s\tVersion: %s\tGit Commit: %s",
 		config.MaxInflight, sharedQueue, release, sha)
 
+	log.Printf("[Warning] NATS Streaming is deprecated and will be removed in a future release. See: https://www.openfaas.com/blog/jetstream-for-openfaas/")
+
 	client := makeClient()
 
 	counter := uint64(0)
@@ -99,7 +100,7 @@ func main() {
 			timeTaken := time.Since(started).Seconds()
 
 			if req.CallbackURL != nil {
-				resultStatusCode, resultErr := postResult(&client,
+				resultStatusCode, err := postResult(&client,
 					res,
 					functionResult,
 					req.CallbackURL.String(),
@@ -108,8 +109,8 @@ func main() {
 					req.Function,
 					timeTaken)
 
-				if resultErr != nil {
-					log.Printf("[#%d] Posted callback to: %s - status %d, error: %s\n", i, req.CallbackURL.String(), http.StatusServiceUnavailable, resultErr.Error())
+				if err != nil {
+					log.Printf("[#%d] Posted callback to: %s - status %d, error: %s\n", i, req.CallbackURL.String(), http.StatusServiceUnavailable, err.Error())
 				} else {
 					log.Printf("[#%d] Posted result to %s - status: %d", i, req.CallbackURL.String(), resultStatusCode)
 				}
@@ -121,7 +122,7 @@ func main() {
 		if res.Body != nil {
 			defer res.Body.Close()
 
-			resData, err := ioutil.ReadAll(res.Body)
+			resData, err := io.ReadAll(res.Body)
 			functionResult = resData
 
 			if err != nil {
@@ -140,7 +141,7 @@ func main() {
 		if req.CallbackURL != nil {
 			log.Printf("[#%d] Callback to: %s\n", i, req.CallbackURL.String())
 
-			resultStatusCode, resultErr := postResult(&client,
+			resultStatusCode, err := postResult(&client,
 				res,
 				functionResult,
 				req.CallbackURL.String(),
@@ -149,8 +150,8 @@ func main() {
 				req.Function,
 				timeTaken)
 
-			if resultErr != nil {
-				log.Printf("[#%d] Error posting to callback-url: %s\n", i, resultErr)
+			if err != nil {
+				log.Printf("[#%d] Error posting to callback-url: %s\n", i, err)
 			} else {
 				log.Printf("[#%d] Posted result for %s to callback-url: %s, status: %d", i, req.Function, req.CallbackURL.String(), resultStatusCode)
 			}
@@ -177,15 +178,16 @@ func main() {
 		ackWait:        config.AckWait,
 	}
 
-	if initErr := natsQueue.connect(); initErr != nil {
-		log.Panic(initErr)
+	if err := natsQueue.connect(); err != nil {
+		log.Panic(err)
 	}
 
 	// Wait for a SIGINT (perhaps triggered by user with CTRL-C)
 	// Run cleanup when signal is received
 	signalChan := make(chan os.Signal, 1)
 	signal.Notify(signalChan, os.Interrupt)
 	<-signalChan
+
 	fmt.Printf("\nReceived an interrupt, unsubscribing and closing connection...\n\n")
 	if err := natsQueue.closeConnection(); err != nil {
 		log.Panicf("Cannot close connection to %s because of an error: %v\n", natsQueue.natsURL, err)
@@ -202,7 +204,6 @@ func makeClient() http.Client {
 			Timeout:   30 * time.Second,
 			KeepAlive: 0,
 		}).DialContext,
-
 		MaxIdleConns:          1,
 		DisableKeepAlives:     true,
 		IdleConnTimeout:       120 * time.Millisecond,
@@ -225,7 +226,6 @@ func postResult(client *http.Client, functionRes *http.Response, result []byte,
 	}
 
 	request, err := http.NewRequest(http.MethodPost, callbackURL, reader)
-
 	if err != nil {
 		return http.StatusInternalServerError, fmt.Errorf("unable to post result, error: %s", err.Error())
 	}