| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 interceptor |
| |
| import ( |
| errorsEx "github.com/apache/servicecomb-service-center/pkg/errors" |
| "github.com/apache/servicecomb-service-center/pkg/log" |
| "github.com/apache/servicecomb-service-center/pkg/util" |
| "net/http" |
| ) |
| |
| var interceptors []*Interception |
| |
| type Intercept func(http.ResponseWriter, *http.Request) error |
| |
| func (f Intercept) Name() string { |
| return util.FuncName(f) |
| } |
| |
| type Interception struct { |
| function Intercept |
| } |
| |
| func (i Interception) Invoke(w http.ResponseWriter, req *http.Request) error { |
| return i.function(w, req) |
| } |
| |
| func init() { |
| interceptors = make([]*Interception, 0, 10) |
| } |
| |
| func RegisterInterceptFunc(intc Intercept) { |
| interceptors = append(interceptors, &Interception{ |
| function: intc, |
| }) |
| |
| log.Infof("Intercept %s", intc.Name()) |
| } |
| |
| func InvokeInterceptors(w http.ResponseWriter, req *http.Request) (err error) { |
| var intc *Interception |
| defer func() { |
| if itf := recover(); itf != nil { |
| log.Panic(itf) |
| |
| err = errorsEx.RaiseError(itf) |
| |
| http.Error(w, err.Error(), http.StatusInternalServerError) |
| } |
| }() |
| for _, intc = range interceptors { |
| err = intc.Invoke(w, req) |
| if err != nil { |
| return |
| } |
| } |
| return |
| } |