allow share endpoint to return multiple frontends; more frontend selection (#110)

cmd/zrok/loop.go

@@ -42,6 +42,7 @@ type loopCmd struct {
 	maxDwellMs        int
 	minPacingMs       int
 	maxPacingMs       int
+	frontendSelection []string
 }
 
 func newLoopCmd() *loopCmd {
@@ -62,6 +63,7 @@ func newLoopCmd() *loopCmd {
 	cmd.Flags().IntVar(&r.maxDwellMs, "max-dwell-ms", 1000, "Maximum dwell time in milliseconds")
 	cmd.Flags().IntVar(&r.minPacingMs, "min-pacing-ms", 0, "Minimum pacing in milliseconds")
 	cmd.Flags().IntVar(&r.maxPacingMs, "max-pacing-ms", 0, "Maximum pacing in milliseconds")
+	cmd.Flags().StringArrayVar(&r.frontendSelection, "frontends", []string{"public"}, "Selected frontends to use for the share")
 	return r
 }
 
@@ -186,6 +188,7 @@ func (l *looper) startup() {
 	tunnelReq.Body = &rest_model_zrok.ShareRequest{
 		EnvZID:               l.env.ZId,
 		ShareMode:            "public",
+		FrontendSelection:    l.cmd.frontendSelection,
 		BackendMode:          "proxy",
 		BackendProxyEndpoint: fmt.Sprintf("looper#%d", l.id),
 		AuthScheme:           string(model.None),
@@ -196,7 +199,7 @@ func (l *looper) startup() {
 		panic(err)
 	}
 	l.service = tunnelResp.Payload.SvcToken
-	l.proxyEndpoint = tunnelResp.Payload.FrontendProxyEndpoint
+	l.proxyEndpoint = tunnelResp.Payload.FrontendProxyEndpoints[0]
 }
 
 func (l *looper) dwell() {

cmd/zrok/reserve.go

@@ -102,7 +102,7 @@ func (cmd *reserveCommand) run(_ *cobra.Command, args []string) {
 	}
 
 	logrus.Infof("your reserved service token is '%v'", resp.Payload.SvcToken)
-	if resp.Payload.FrontendProxyEndpoint != "" {
-		logrus.Infof("your reserved service frontend is '%v'", resp.Payload.FrontendProxyEndpoint)
+	for _, fpe := range resp.Payload.FrontendProxyEndpoints {
+		logrus.Infof("reserved frontend endpoint: %v", fpe)
 	}
 }

cmd/zrok/share_public.go

@@ -166,7 +166,7 @@ func (self *sharePublicCommand) run(_ *cobra.Command, args []string) {
 		p := widgets.NewParagraph()
 		p.Border = true
 		p.Title = " access your zrok service "
-		p.Text = fmt.Sprintf("%v%v", strings.Repeat(" ", (((w-12)-len(resp.Payload.FrontendProxyEndpoint))/2)-1), resp.Payload.FrontendProxyEndpoint)
+		p.Text = fmt.Sprintf("%v%v", strings.Repeat(" ", (((w-12)-len(resp.Payload.FrontendProxyEndpoints[0]))/2)-1), resp.Payload.FrontendProxyEndpoints[0])
 		p.TextStyle = ui.Style{Fg: ui.ColorWhite}
 		p.PaddingTop = 1
 		p.SetRect(5, 5, w-10, 10)
@@ -220,7 +220,7 @@ func (self *sharePublicCommand) run(_ *cobra.Command, args []string) {
 			}
 		}
 	} else {
-		logrus.Infof("access your zrok service: %v", resp.Payload.FrontendProxyEndpoint)
+		logrus.Infof("access your zrok service: %v", resp.Payload.FrontendProxyEndpoints[0])
 		for {
 			time.Sleep(30 * time.Second)
 		}

controller/share.go

@@ -60,13 +60,18 @@ func (h *shareHandler) Handle(params service.ShareParams, principal *rest_model_
 	var frontendEndpoints []string
 	switch params.Body.ShareMode {
 	case "public":
+		if len(params.Body.FrontendSelection) < 1 {
+			logrus.Info("no frontend selection provided")
+			return service.NewShareNotFound()
+		}
+
 		var frontendZIds []string
 		var frontendTemplates []string
 		for _, frontendSelection := range params.Body.FrontendSelection {
 			sfe, err := str.FindFrontendPubliclyNamed(frontendSelection, tx)
 			if err != nil {
 				logrus.Error(err)
-				return service.NewUpdateShareNotFound()
+				return service.NewShareNotFound()
 			}
 			if sfe != nil && sfe.UrlTemplate != nil {
 				frontendZIds = append(frontendZIds, sfe.ZId)
@@ -116,7 +121,7 @@ func (h *shareHandler) Handle(params service.ShareParams, principal *rest_model_
 	logrus.Infof("recorded service '%v' with id '%v' for '%v'", svcToken, sid, principal.Email)
 
 	return service.NewShareCreated().WithPayload(&rest_model_zrok.ShareResponse{
-		FrontendProxyEndpoint: frontendEndpoints[0],
+		FrontendProxyEndpoints: frontendEndpoints,
 		SvcToken:               svcToken,
 	})
 }

rest_client_zrok/service/share_responses.go

@@ -35,6 +35,12 @@ func (o *ShareReader) ReadResponse(response runtime.ClientResponse, consumer run
 			return nil, err
 		}
 		return nil, result
+	case 404:
+		result := NewShareNotFound()
+		if err := result.readResponse(response, consumer, o.formats); err != nil {
+			return nil, err
+		}
+		return nil, result
 	case 500:
 		result := NewShareInternalServerError()
 		if err := result.readResponse(response, consumer, o.formats); err != nil {
@@ -160,6 +166,57 @@ func (o *ShareUnauthorized) readResponse(response runtime.ClientResponse, consum
 	return nil
 }
 
+// NewShareNotFound creates a ShareNotFound with default headers values
+func NewShareNotFound() *ShareNotFound {
+	return &ShareNotFound{}
+}
+
+/*
+ShareNotFound describes a response with status code 404, with default header values.
+
+not found
+*/
+type ShareNotFound struct {
+}
+
+// IsSuccess returns true when this share not found response has a 2xx status code
+func (o *ShareNotFound) IsSuccess() bool {
+	return false
+}
+
+// IsRedirect returns true when this share not found response has a 3xx status code
+func (o *ShareNotFound) IsRedirect() bool {
+	return false
+}
+
+// IsClientError returns true when this share not found response has a 4xx status code
+func (o *ShareNotFound) IsClientError() bool {
+	return true
+}
+
+// IsServerError returns true when this share not found response has a 5xx status code
+func (o *ShareNotFound) IsServerError() bool {
+	return false
+}
+
+// IsCode returns true when this share not found response a status code equal to that given
+func (o *ShareNotFound) IsCode(code int) bool {
+	return code == 404
+}
+
+func (o *ShareNotFound) Error() string {
+	return fmt.Sprintf("[POST /share][%d] shareNotFound ", 404)
+}
+
+func (o *ShareNotFound) String() string {
+	return fmt.Sprintf("[POST /share][%d] shareNotFound ", 404)
+}
+
+func (o *ShareNotFound) readResponse(response runtime.ClientResponse, consumer runtime.Consumer, formats strfmt.Registry) error {
+
+	return nil
+}
+
 // NewShareInternalServerError creates a ShareInternalServerError with default headers values
 func NewShareInternalServerError() *ShareInternalServerError {
 	return &ShareInternalServerError{}

rest_model_zrok/share_response.go

@@ -17,8 +17,8 @@ import (
 // swagger:model shareResponse
 type ShareResponse struct {
 
-	// frontend proxy endpoint
-	FrontendProxyEndpoint string `json:"frontendProxyEndpoint,omitempty"`
+	// frontend proxy endpoints
+	FrontendProxyEndpoints []string `json:"frontendProxyEndpoints"`
 
 	// svc token
 	SvcToken string `json:"svcToken,omitempty"`

rest_server_zrok/embedded_spec.go

@@ -463,6 +463,9 @@ func init() {
           "401": {
             "description": "unauthorized"
           },
+          "404": {
+            "description": "not found"
+          },
           "500": {
             "description": "internal server error",
             "schema": {
@@ -967,8 +970,11 @@ func init() {
     "shareResponse": {
       "type": "object",
       "properties": {
-        "frontendProxyEndpoint": {
+        "frontendProxyEndpoints": {
+          "type": "array",
+          "items": {
             "type": "string"
+          }
         },
         "svcToken": {
           "type": "string"
@@ -1502,6 +1508,9 @@ func init() {
           "401": {
             "description": "unauthorized"
           },
+          "404": {
+            "description": "not found"
+          },
           "500": {
             "description": "internal server error",
             "schema": {
@@ -2006,8 +2015,11 @@ func init() {
     "shareResponse": {
       "type": "object",
       "properties": {
-        "frontendProxyEndpoint": {
+        "frontendProxyEndpoints": {
+          "type": "array",
+          "items": {
             "type": "string"
+          }
         },
         "svcToken": {
           "type": "string"

rest_server_zrok/operations/service/share_responses.go

@@ -83,6 +83,31 @@ func (o *ShareUnauthorized) WriteResponse(rw http.ResponseWriter, producer runti
 	rw.WriteHeader(401)
 }
 
+// ShareNotFoundCode is the HTTP code returned for type ShareNotFound
+const ShareNotFoundCode int = 404
+
+/*
+ShareNotFound not found
+
+swagger:response shareNotFound
+*/
+type ShareNotFound struct {
+}
+
+// NewShareNotFound creates ShareNotFound with default headers values
+func NewShareNotFound() *ShareNotFound {
+
+	return &ShareNotFound{}
+}
+
+// WriteResponse to the client
+func (o *ShareNotFound) WriteResponse(rw http.ResponseWriter, producer runtime.Producer) {
+
+	rw.Header().Del(runtime.HeaderContentType) //Remove Content-Type on empty responses
+
+	rw.WriteHeader(404)
+}
+
 // ShareInternalServerErrorCode is the HTTP code returned for type ShareInternalServerError
 const ShareInternalServerErrorCode int = 500
 

specs/zrok.yml

@@ -321,6 +321,8 @@ paths:
             $ref: "#/definitions/shareResponse"
         401:
           description: unauthorized
+        404:
+          description: not found
         500:
           description: internal server error
           schema:
@@ -635,7 +637,9 @@ definitions:
   shareResponse:
     type: object
     properties:
-      frontendProxyEndpoint:
+      frontendProxyEndpoints:
+        type: array
+        items:
           type: string
       svcToken:
         type: string

ui/src/api/types.js

@@ -186,7 +186,7 @@
  * @typedef shareResponse
  * @memberof module:types
  * 
- * @property {string} frontendProxyEndpoint 
+ * @property {string[]} frontendProxyEndpoints 
  * @property {string} svcToken 
  */