fix:go-http plugin path encoding error (#2917)

* fix:go-http plugin path encoding error

* fix:(http_test.go) File is not gofmt -ed with -s (gofmt)

* fix:(http_test.go) File is not gofmt -ed with -s (gofmt)

---------

Co-authored-by: J-guanghua <490011961@qq.com>

cmd/protoc-gen-go-http/http.go

@@ -240,7 +240,7 @@ func buildPathVars(path string) (res map[string]*string) {
 }
 
 func replacePath(name string, value string, path string) string {
-	pattern := regexp.MustCompile(fmt.Sprintf(`(?i){([\s]*%s[\s]*)=?([^{}]*)}`, name))
+	pattern := regexp.MustCompile(fmt.Sprintf(`(?i){([\s]*%s\b[\s]*)=?([^{}]*)}`, name))
 	idx := pattern.FindStringIndex(path)
 	if len(idx) > 0 {
 		path = fmt.Sprintf("%s{%s:%s}%s",

cmd/protoc-gen-go-http/http_test.go

@@ -85,3 +85,16 @@ func TestIterationMiddle(t *testing.T) {
 		t.Fatal(`replacePath("message.name", "messages/*", path) should be "/test/{message.name:messages/.*}/books"`)
 	}
 }
+
+func TestReplaceBoundary(t *testing.T) {
+	path := "/test/{message.namespace=*}/name/{message.name=*}"
+	vars := buildPathVars(path)
+	for v, s := range vars {
+		if s != nil {
+			path = replacePath(v, *s, path)
+		}
+	}
+	if !reflect.DeepEqual("/test/{message.namespace:.*}/name/{message.name:.*}", path) {
+		t.Fatal(`"/test/{message.namespace=*}/name/{message.name=*}" should be "/test/{message.namespace:.*}/name/{message.name:.*}"`)
+	}
+}