| /* |
| * 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 apiconfig |
| |
| import ( |
| "net/http" |
| ) |
| |
| import ( |
| fc "github.com/dubbo-go-pixiu/pixiu-api/pkg/api/config" |
| "github.com/dubbo-go-pixiu/pixiu-api/pkg/router" |
| "github.com/pkg/errors" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/common/constant" |
| "github.com/apache/dubbo-go-pixiu/pkg/common/extension/filter" |
| "github.com/apache/dubbo-go-pixiu/pkg/config" |
| contexthttp "github.com/apache/dubbo-go-pixiu/pkg/context/http" |
| "github.com/apache/dubbo-go-pixiu/pkg/filter/http/apiconfig/api" |
| "github.com/apache/dubbo-go-pixiu/pkg/logger" |
| "github.com/apache/dubbo-go-pixiu/pkg/server" |
| ) |
| |
| const ( |
| // Kind is the kind of Fallback. |
| Kind = constant.HTTPApiConfigFilter |
| ) |
| |
| func init() { |
| filter.RegisterHttpFilter(&Plugin{}) |
| } |
| |
| type ( |
| Plugin struct { |
| } |
| |
| FilterFactory struct { |
| cfg *ApiConfigConfig |
| apiService api.APIDiscoveryService |
| } |
| Filter struct { |
| apiService api.APIDiscoveryService |
| } |
| ) |
| |
| func (p *Plugin) Kind() string { |
| return Kind |
| } |
| |
| func (p *Plugin) CreateFilterFactory() (filter.HttpFilterFactory, error) { |
| return &FilterFactory{cfg: &ApiConfigConfig{}}, nil |
| } |
| |
| func (factory *FilterFactory) Config() interface{} { |
| return factory.cfg |
| } |
| |
| func (factory *FilterFactory) Apply() error { |
| factory.apiService = api.NewLocalMemoryAPIDiscoveryService() |
| |
| if factory.cfg.Dynamic { |
| server.GetApiConfigManager().AddApiConfigListener(factory.cfg.DynamicAdapter, factory) |
| return nil |
| } |
| |
| config, err := initApiConfig(factory.cfg) |
| if err != nil { |
| logger.Errorf("Get ApiConfig fail: %v", err) |
| } |
| if err := factory.apiService.InitAPIsFromConfig(*config); err != nil { |
| logger.Errorf("InitAPIsFromConfig fail: %v", err) |
| } |
| |
| return nil |
| } |
| |
| func (factory *FilterFactory) OnAddAPI(r router.API) error { |
| return factory.apiService.AddOrUpdateAPI(r) |
| } |
| func (factory *FilterFactory) OnRemoveAPI(r router.API) error { |
| return factory.apiService.RemoveAPIByIntance(r) |
| } |
| |
| func (factory *FilterFactory) OnDeleteRouter(r fc.Resource) error { |
| return factory.apiService.RemoveAPIByPath(r) |
| } |
| |
| func (factory *FilterFactory) GetAPIService() api.APIDiscoveryService { |
| return factory.apiService |
| } |
| |
| func (factory *FilterFactory) PrepareFilterChain(ctx *contexthttp.HttpContext, chain filter.FilterChain) error { |
| f := &Filter{apiService: factory.apiService} |
| chain.AppendDecodeFilters(f) |
| return nil |
| } |
| |
| func (f *Filter) Decode(ctx *contexthttp.HttpContext) filter.FilterStatus { |
| req := ctx.Request |
| v, err := f.apiService.MatchAPI(req.URL.Path, fc.HTTPVerb(req.Method)) |
| if err != nil { |
| ctx.SendLocalReply(http.StatusNotFound, constant.Default404Body) |
| e := errors.Errorf("Requested URL %s not found", req.URL.Path) |
| logger.Debug(e.Error()) |
| return filter.Stop |
| } |
| |
| if !v.Method.Enable { |
| ctx.SendLocalReply(http.StatusNotAcceptable, constant.Default406Body) |
| e := errors.Errorf("Requested API %s %s does not online", req.Method, req.URL.Path) |
| logger.Debug(e.Error()) |
| return filter.Stop |
| } |
| ctx.API(v) |
| return filter.Continue |
| } |
| |
| func (factory *FilterFactory) GetApiService() api.APIDiscoveryService { |
| return factory.apiService |
| } |
| |
| // initApiConfig return value of the bool is for the judgment of whether is a api meta data error, a kind of silly (?) |
| func initApiConfig(cf *ApiConfigConfig) (*fc.APIConfig, error) { |
| if cf.APIMetaConfig != nil { |
| a, err := config.LoadAPIConfig(cf.APIMetaConfig) |
| if err != nil { |
| logger.Warnf("load api config from etcd error:%+v", err) |
| return nil, err |
| } |
| return a, nil |
| } |
| |
| a, err := config.LoadAPIConfigFromFile(cf.Path) |
| if err != nil { |
| logger.Errorf("load api config error:%+v", err) |
| return nil, err |
| } |
| return a, nil |
| } |
| |
| var _ filter.HttpFilterFactory = new(FilterFactory) |