api add middleware support (#140)

* rebase upstream

* rebase

* trim no need line

* trim no need line

* trim no need line

* update doc

* remove update

* remove no need

* remove no need

* goctl add jwt support

* goctl add jwt support

* goctl add jwt support

* goctl support import

* goctl support import

* support return ()

* revert

* refactor and rename folder to group

* remove no need

* add anonymous annotation

* optimized

* rename

* rename

* update test

* api add middleware support: usage:

@server(
    middleware: M1, M2
)

* api add middleware support: usage:

@server(
    middleware: M1, M2
)

* simple logic

* should reverse middlewares

* optimized

* optimized

* rename

Co-authored-by: kingxt <dream4kingxt@163.com>

tools/goctl/api/gogen/gensvc.go

@@ -9,16 +9,20 @@ import (
 	"github.com/tal-tech/go-zero/tools/goctl/api/util"
 	"github.com/tal-tech/go-zero/tools/goctl/templatex"
 	ctlutil "github.com/tal-tech/go-zero/tools/goctl/util"
+	"github.com/tal-tech/go-zero/tools/goctl/vars"
 )
 
 const (
 	contextFilename = "servicecontext.go"
 	contextTemplate = `package svc
 
-import {{.configImport}}
+import (
+	{{.configImport}}
+)
 
 type ServiceContext struct {
 	Config {{.config}}
+	{{.middleware}}
 }
 
 func NewServiceContext(c {{.config}}) *ServiceContext {
@@ -53,12 +57,22 @@ func genServiceContext(dir string, api *spec.ApiSpec) error {
 		return err
 	}
 
+	var middlewareStr string
+	for _, item := range getMiddleware(api) {
+		middlewareStr += fmt.Sprintf("%s rest.Middleware\n", item)
+	}
+
 	var configImport = "\"" + ctlutil.JoinPackages(parentPkg, configDir) + "\""
+	if len(middlewareStr) > 0 {
+		configImport += fmt.Sprintf("\n\"%s/rest\"", vars.ProjectOpenSourceUrl)
+	}
+
 	t := template.Must(template.New("contextTemplate").Parse(text))
 	buffer := new(bytes.Buffer)
 	err = t.Execute(buffer, map[string]string{
 		"configImport": configImport,
 		"config":       "config.Config",
+		"middleware":   middlewareStr,
 	})
 	if err != nil {
 		return nil