github.com/cloudwego/hertz@v0.9.3/pkg/app/client/middleware.go (about)

     1  /*
     2   * Copyright 2022 CloudWeGo Authors
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package client
    18  
    19  import (
    20  	"context"
    21  
    22  	"github.com/cloudwego/hertz/pkg/protocol"
    23  )
    24  
    25  // Endpoint represent one method for calling from remote.
    26  type Endpoint func(ctx context.Context, req *protocol.Request, resp *protocol.Response) (err error)
    27  
    28  // Middleware deal with input Endpoint and output Endpoint.
    29  type Middleware func(Endpoint) Endpoint
    30  
    31  // Chain connect middlewares into one middleware.
    32  func chain(mws ...Middleware) Middleware {
    33  	return func(next Endpoint) Endpoint {
    34  		for i := len(mws) - 1; i >= 0; i-- {
    35  			next = mws[i](next)
    36  		}
    37  		return next
    38  	}
    39  }