forked from jaegertracing/jaeger
/
zipkin.go
84 lines (70 loc) · 2.56 KB
/
zipkin.go
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// Copyright (c) 2020 The Jaeger Authors.
//
// Licensed 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 server
import (
"net"
"net/http"
"strconv"
"strings"
"github.com/gorilla/mux"
"github.com/rs/cors"
"go.uber.org/zap"
"github.com/jaegertracing/jaeger/cmd/collector/app/handler"
"github.com/jaegertracing/jaeger/cmd/collector/app/zipkin"
"github.com/jaegertracing/jaeger/pkg/healthcheck"
)
// ZipkinServerParams to construct a new Jaeger Collector Zipkin Server
type ZipkinServerParams struct {
Port int
Handler handler.ZipkinSpansHandler
RecoveryHandler func(http.Handler) http.Handler
AllowedOrigins string
AllowedHeaders string
HealthCheck *healthcheck.HealthCheck
Logger *zap.Logger
}
// StartZipkinServer based on the given parameters
func StartZipkinServer(params *ZipkinServerParams) (*http.Server, error) {
if params.Port == 0 {
return nil, nil
}
httpPortStr := ":" + strconv.Itoa(params.Port)
params.Logger.Info("Listening for Zipkin HTTP traffic", zap.Int("zipkin.http-port", params.Port))
listener, err := net.Listen("tcp", httpPortStr)
if err != nil {
return nil, err
}
server := &http.Server{Addr: httpPortStr}
serveZipkin(server, listener, params)
return server, nil
}
func serveZipkin(server *http.Server, listener net.Listener, params *ZipkinServerParams) {
r := mux.NewRouter()
zHandler := zipkin.NewAPIHandler(params.Handler)
zHandler.RegisterRoutes(r)
origins := strings.Split(strings.ReplaceAll(params.AllowedOrigins, " ", ""), ",")
headers := strings.Split(strings.ReplaceAll(params.AllowedHeaders, " ", ""), ",")
cors := cors.New(cors.Options{
AllowedOrigins: origins,
AllowedMethods: []string{"POST"}, // Allowing only POST, because that's the only handled one
AllowedHeaders: headers,
})
server.Handler = cors.Handler(params.RecoveryHandler(r))
go func(listener net.Listener, server *http.Server) {
if err := server.Serve(listener); err != nil {
params.Logger.Fatal("Could not launch Zipkin server", zap.Error(err))
}
params.HealthCheck.Set(healthcheck.Unavailable)
}(listener, server)
}