1ec2759550
This change refactors gRPC code used within the v3 API package into generic code that can be used for managing gRPC and gRPC Gateway.
106 lines
3.1 KiB
Go
106 lines
3.1 KiB
Go
// Copyright 2018 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package v3
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import (
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"net/http"
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"strconv"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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log "github.com/sirupsen/logrus"
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"google.golang.org/grpc"
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pb "github.com/coreos/clair/api/v3/clairpb"
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"github.com/coreos/clair/database"
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"github.com/coreos/clair/pkg/grpcutil"
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)
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var (
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promResponseDurationMilliseconds = prometheus.NewHistogramVec(prometheus.HistogramOpts{
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Name: "clair_v3_api_response_duration_milliseconds",
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Help: "The duration of time it takes to receive and write a response to an V2 API request",
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Buckets: prometheus.ExponentialBuckets(9.375, 2, 10),
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}, []string{"route", "code"})
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)
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func init() {
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prometheus.MustRegister(promResponseDurationMilliseconds)
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}
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func prometheusHandler(h http.Handler) http.Handler {
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mux := http.NewServeMux()
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mux.Handle("/", h)
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mux.Handle("/metrics", prometheus.Handler())
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return mux
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}
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type httpStatusWriter struct {
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http.ResponseWriter
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StatusCode int
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}
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func (w *httpStatusWriter) WriteHeader(code int) {
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w.StatusCode = code
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w.ResponseWriter.WriteHeader(code)
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}
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func loggingHandler(h http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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start := time.Now()
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lrw := &httpStatusWriter{ResponseWriter: w, StatusCode: http.StatusOK}
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h.ServeHTTP(lrw, r)
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log.WithFields(log.Fields{
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"remote addr": r.RemoteAddr,
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"method": r.Method,
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"request uri": r.RequestURI,
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"status": strconv.Itoa(lrw.StatusCode),
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"elapsed time (ms)": float64(time.Since(start).Nanoseconds()) * 1e-6,
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}).Info("handled HTTP request")
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})
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}
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// ListenAndServe serves the Clair v3 API over gRPC and the gRPC Gateway.
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func ListenAndServe(addr, keyFile, certFile, caPath string, store database.Datastore) error {
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srv := grpcutil.MuxedGRPCServer{
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Addr: addr,
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ServicesFunc: func(gsrv *grpc.Server) {
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pb.RegisterAncestryServiceServer(gsrv, &AncestryServer{Store: store})
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pb.RegisterNotificationServiceServer(gsrv, &NotificationServer{Store: store})
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pb.RegisterStatusServiceServer(gsrv, &StatusServer{Store: store})
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},
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ServiceHandlerFuncs: []grpcutil.RegisterServiceHandlerFunc{
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pb.RegisterAncestryServiceHandler,
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pb.RegisterNotificationServiceHandler,
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pb.RegisterStatusServiceHandler,
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},
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}
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middleware := func(h http.Handler) http.Handler {
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return prometheusHandler(loggingHandler(h))
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}
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var err error
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if caPath == "" {
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err = srv.ListenAndServe(middleware)
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} else {
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err = srv.ListenAndServeTLS(certFile, keyFile, caPath, middleware)
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}
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return err
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}
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