120 lines
3.5 KiB
Go
120 lines
3.5 KiB
Go
package server
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import (
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"net"
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"net/http"
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"time"
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basicauth "github.com/99designs/basicauth-go"
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"github.com/go-chi/chi/middleware"
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"github.com/go-chi/cors"
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metrics "github.com/slok/go-http-metrics/metrics/prometheus"
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ghmm "github.com/slok/go-http-metrics/middleware"
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"github.com/slok/go-http-metrics/middleware/std"
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"github.com/spf13/viper"
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)
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// the following is from
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// https://learning-cloud-native-go.github.io/docs/a6.adding_zerolog_logger/
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func ipFromHostPort(hp string) string {
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h, _, err := net.SplitHostPort(hp)
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if err != nil {
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return ""
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}
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if len(h) > 0 && h[0] == '[' {
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return h[1 : len(h)-1]
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}
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return h
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}
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type loggingResponseWriter struct {
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http.ResponseWriter
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statusCode int
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}
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func NewLoggingResponseWriter(w http.ResponseWriter) *loggingResponseWriter {
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return &loggingResponseWriter{w, http.StatusOK}
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}
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func (lrw *loggingResponseWriter) WriteHeader(code int) {
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lrw.statusCode = code
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lrw.ResponseWriter.WriteHeader(code)
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}
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// type Middleware func(http.Handler) http.Handler
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// this returns a Middleware that is designed to do every request through the
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// mux, note the signature:
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func (s *server) LoggingMiddleware() func(http.Handler) http.Handler {
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// FIXME this should use https://github.com/google/go-cloud/blob/master/server/requestlog/requestlog.go
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return func(next 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 := NewLoggingResponseWriter(w)
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ctx := r.Context()
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defer func() {
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latency := time.Since(start)
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s.log.Info().
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Time("request_start", start).
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Str("method", r.Method).
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Str("url", r.URL.String()).
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Str("useragent", r.UserAgent()).
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Str("request_id", ctx.Value(middleware.RequestIDKey).(string)).
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Str("referer", r.Referer()).
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Str("proto", r.Proto).
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Str("remoteIP", ipFromHostPort(r.RemoteAddr)).
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Int("status", lrw.statusCode).
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Int("latency_ms", int(latency.Milliseconds())).
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Send()
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}()
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next.ServeHTTP(lrw, r)
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})
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}
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}
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func (s *server) CORSMiddleware() func(http.Handler) http.Handler {
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return cors.Handler(cors.Options{
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// CHANGEME! these are defaults, change them to suit your needs or
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// read from environment/viper.
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// AllowedOrigins: []string{"https://foo.com"}, // Use this to allow specific origin hosts
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AllowedOrigins: []string{"*"},
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// AllowOriginFunc: func(r *http.Request, origin string) bool { return true },
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AllowedMethods: []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
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AllowedHeaders: []string{"Accept", "Authorization", "Content-Type", "X-CSRF-Token"},
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ExposedHeaders: []string{"Link"},
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AllowCredentials: false,
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MaxAge: 300, // Maximum value not ignored by any of major browsers
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})
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}
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func (s *server) AuthMiddleware() func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// CHANGEME you'll want to change this to do stuff.
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s.log.Info().Msg("AUTH: before request")
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next.ServeHTTP(w, r)
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})
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}
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}
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func (s *server) MetricsMiddleware() func(http.Handler) http.Handler {
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mdlw := ghmm.New(ghmm.Config{
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Recorder: metrics.NewRecorder(metrics.Config{}),
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})
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return func(next http.Handler) http.Handler {
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return std.Handler("", mdlw, next)
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}
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}
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func (s *server) MetricsAuthMiddleware() func(http.Handler) http.Handler {
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return basicauth.New(
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"metrics",
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map[string][]string{
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viper.GetString("METRICS_USERNAME"): {
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viper.GetString("METRICS_PASSWORD"),
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},
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},
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)
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}
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