fix: cleanup workflow example and workflow runtime

Signed-off-by: mikeee <[email protected]>

Author: mikeee

examples/workflow/README.md

@@ -19,6 +19,7 @@ expected_stdout_lines:
   - '== APP == workflow started with id: a7a4168d-3a1c-41da-8a4f-e7f6d9c718d9'
   - '== APP == workflow paused'
   - '== APP == workflow resumed'
+  - '== APP == stage: 1'
   - '== APP == workflow event raised'
   - '== APP == stage: 2'
   - '== APP == workflow status: COMPLETED'
@@ -55,6 +56,7 @@ dapr run --app-id workflow-sequential \
   - '== APP == workflow started with id: a7a4168d-3a1c-41da-8a4f-e7f6d9c718d9'
   - '== APP == workflow paused'
   - '== APP == workflow resumed'
+  - '== APP == stage: 1'
   - '== APP == workflow event raised'
   - '== APP == stage: 2'
   - '== APP == workflow status: COMPLETED'

examples/workflow/main.go

@@ -19,7 +19,7 @@ const (
 )
 
 func main() {
-	wr, err := workflow.NewRuntime("localhost", "50001")
+	wr, err := workflow.NewRuntime(":50001")
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -116,7 +116,9 @@ func main() {
 		log.Fatalf("workflow not running")
 	}
 
-	fmt.Printf("workflow resumed\n")
+	fmt.Println("workflow resumed")
+
+	fmt.Printf("stage: %d", stage)
 
 	// Raise Event Test
 

workflow/internal/parse.go

@@ -0,0 +1,175 @@
+/*
+Copyright 2023 The Dapr Authors
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package internal
+
+import (
+	"errors"
+	"fmt"
+	"net"
+	"net/url"
+	"strings"
+)
+
+// Parsed represents a parsed gRPC endpoint.
+type Parsed struct {
+	Target string
+	TLS    bool
+}
+
+//nolint:revive
+func ParseGRPCEndpoint(endpoint string) (Parsed, error) {
+	target := endpoint
+	if len(target) == 0 {
+		return Parsed{}, errors.New("target is required")
+	}
+
+	var dnsAuthority string
+	var hostname string
+	var tls bool
+
+	urlSplit := strings.Split(target, ":")
+	if len(urlSplit) == 3 && !strings.Contains(target, "://") {
+		target = strings.Replace(target, ":", "://", 1)
+	} else if len(urlSplit) >= 2 && !strings.Contains(target, "://") && schemeKnown(urlSplit[0]) {
+		target = strings.Replace(target, ":", "://", 1)
+	} else {
+		urlSplit = strings.Split(target, "://")
+		if len(urlSplit) == 1 {
+			target = "dns://" + target
+		} else {
+			scheme := urlSplit[0]
+			if !schemeKnown(scheme) {
+				return Parsed{}, fmt.Errorf("unknown scheme: %q", scheme)
+			}
+
+			if scheme == "dns" {
+				urlSplit = strings.Split(target, "/")
+				if len(urlSplit) < 4 {
+					return Parsed{}, fmt.Errorf("invalid dns scheme: %q", target)
+				}
+				dnsAuthority = urlSplit[2]
+				target = "dns://" + urlSplit[3]
+			}
+		}
+	}
+
+	ptarget, err := url.Parse(target)
+	if err != nil {
+		return Parsed{}, err
+	}
+
+	var errs []string
+	for k := range ptarget.Query() {
+		if k != "tls" {
+			errs = append(errs, fmt.Sprintf("unrecognized query parameter: %q", k))
+		}
+	}
+	if len(errs) > 0 {
+		return Parsed{}, fmt.Errorf("failed to parse target %q: %s", target, strings.Join(errs, "; "))
+	}
+
+	if ptarget.Query().Has("tls") {
+		if ptarget.Scheme == "http" || ptarget.Scheme == "https" {
+			return Parsed{}, errors.New("cannot use tls query parameter with http(s) scheme")
+		}
+
+		qtls := ptarget.Query().Get("tls")
+		if qtls != "true" && qtls != "false" {
+			return Parsed{}, fmt.Errorf("invalid value for tls query parameter: %q", qtls)
+		}
+
+		tls = qtls == "true"
+	}
+
+	scheme := ptarget.Scheme
+	if scheme == "https" {
+		tls = true
+	}
+	if scheme == "http" || scheme == "https" {
+		scheme = "dns"
+	}
+
+	hostname = ptarget.Host
+
+	host, port, err := net.SplitHostPort(hostname)
+	aerr, ok := err.(*net.AddrError)
+	if ok && aerr.Err == "missing port in address" {
+		port = "443"
+	} else if err != nil {
+		return Parsed{}, err
+	} else {
+		hostname = host
+	}
+
+	if len(hostname) == 0 {
+		if scheme == "dns" {
+			hostname = "localhost"
+		} else {
+			hostname = ptarget.Path
+		}
+	}
+
+	switch scheme {
+	case "unix":
+		separator := ":"
+		if strings.HasPrefix(endpoint, "unix://") {
+			separator = "://"
+		}
+		target = scheme + separator + hostname
+
+	case "vsock":
+		target = scheme + ":" + hostname + ":" + port
+
+	case "unix-abstract":
+		target = scheme + ":" + hostname
+
+	case "dns":
+		if len(ptarget.Path) > 0 {
+			return Parsed{}, fmt.Errorf("path is not allowed: %q", ptarget.Path)
+		}
+
+		if strings.Count(hostname, ":") == 7 && !strings.HasPrefix(hostname, "[") && !strings.HasSuffix(hostname, "]") {
+			hostname = "[" + hostname + "]"
+		}
+		if len(dnsAuthority) > 0 {
+			dnsAuthority = "//" + dnsAuthority + "/"
+		}
+		target = scheme + ":" + dnsAuthority + hostname + ":" + port
+
+	default:
+		return Parsed{}, fmt.Errorf("unsupported scheme: %q", scheme)
+	}
+
+	return Parsed{
+		Target: target,
+		TLS:    tls,
+	}, nil
+}
+
+func schemeKnown(scheme string) bool {
+	for _, s := range []string{
+		"dns",
+		"unix",
+		"unix-abstract",
+		"vsock",
+		"http",
+		"https",
+	} {
+		if scheme == s {
+			return true
+		}
+	}
+
+	return false
+}