| /* |
| * 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 prometheus |
| |
| import ( |
| stdHttp "net/http" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pixiu/pkg/common/constant" |
| "github.com/apache/dubbo-go-pixiu/pixiu/pkg/common/extension/filter" |
| contextHttp "github.com/apache/dubbo-go-pixiu/pixiu/pkg/context/http" |
| "github.com/apache/dubbo-go-pixiu/pixiu/pkg/logger" |
| prom "github.com/apache/dubbo-go-pixiu/pixiu/pkg/prometheus" |
| ) |
| |
| const ( |
| Kind = constant.HTTPPrometheusMetricFilter |
| ) |
| |
| func init() { |
| filter.RegisterHttpFilter(&Plugin{}) |
| } |
| |
| type ( |
| Plugin struct { |
| } |
| |
| FilterFactory struct { |
| Cfg *MetricCollectConfiguration |
| Prom *prom.Prometheus |
| } |
| |
| Filter struct { |
| Cfg *MetricCollectConfiguration |
| Prom *prom.Prometheus |
| } |
| ) |
| |
| func (p Plugin) Kind() string { |
| return Kind |
| } |
| |
| func (p *Plugin) CreateFilterFactory() (filter.HttpFilterFactory, error) { |
| |
| return &FilterFactory{ |
| Cfg: &MetricCollectConfiguration{}, |
| Prom: prom.NewPrometheus(), |
| }, nil |
| } |
| |
| func (factory *FilterFactory) Config() interface{} { |
| |
| return factory.Cfg |
| } |
| |
| func (factory *FilterFactory) Apply() error { |
| |
| return nil |
| } |
| |
| func (factory *FilterFactory) PrepareFilterChain(ctx *contextHttp.HttpContext, chain filter.FilterChain) error { |
| |
| f := &Filter{ |
| Cfg: factory.Cfg, |
| Prom: factory.Prom, |
| } |
| f.Prom.SetPushGatewayUrl(f.Cfg.Rules.PushGatewayURL, f.Cfg.Rules.MetricPath) |
| f.Prom.SetPushIntervalThreshold(f.Cfg.Rules.CounterPush, f.Cfg.Rules.PushIntervalThreshold) |
| f.Prom.SetPushGatewayJob(f.Cfg.Rules.PushJobName) |
| chain.AppendDecodeFilters(f) |
| return nil |
| } |
| |
| func (f *Filter) Decode(ctx *contextHttp.HttpContext) filter.FilterStatus { |
| |
| if f.Cfg == nil { |
| logger.Errorf("Message:Filter Metric Collect Configuration is null") |
| ctx.SendLocalReply(stdHttp.StatusForbidden, constant.Default403Body) |
| return filter.Continue |
| } |
| if f.Prom == nil { |
| logger.Errorf("Message:Prometheus Collector is not initialized") |
| ctx.SendLocalReply(stdHttp.StatusForbidden, constant.Default403Body) |
| return filter.Continue |
| } |
| if f.Cfg.Rules.CounterPush && f.Cfg.Rules.PushIntervalThreshold == 0 { |
| ctx.SendLocalReply(stdHttp.StatusForbidden, constant.Default403Body) |
| return filter.Continue |
| } |
| start := f.Prom.HandlerFunc() |
| err := start(ctx) |
| if err != nil { |
| logger.Errorf("Message:Context HandlerFunc error") |
| ctx.SendLocalReply(stdHttp.StatusForbidden, constant.Default403Body) |
| } |
| return filter.Continue |
| } |