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server.go
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server.go
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package http
import (
"context"
"errors"
"net"
"net/http"
"github.com/alexfalkowski/go-service/time"
"github.com/alexfalkowski/go-service/transport/http/cors"
"github.com/alexfalkowski/go-service/transport/http/meta"
szap "github.com/alexfalkowski/go-service/transport/http/telemetry/logger/zap"
"github.com/alexfalkowski/go-service/transport/http/telemetry/metrics"
"github.com/alexfalkowski/go-service/transport/http/telemetry/tracer"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"go.opentelemetry.io/otel/metric"
"go.uber.org/fx"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
// ServerParams for HTTP.
type ServerParams struct {
fx.In
Shutdowner fx.Shutdowner
Config *Config
Logger *zap.Logger
Tracer tracer.Tracer
Meter metric.Meter
}
// Server for HTTP.
type Server struct {
Mux *runtime.ServeMux
server *http.Server
params ServerParams
}
// NewServer for HTTP.
func NewServer(params ServerParams) (*Server, error) {
mux := runtime.NewServeMux(runtime.WithIncomingHeaderMatcher(customMatcher))
var handler http.Handler = mux
handler = cors.New().Handler(handler)
h, err := metrics.NewHandler(params.Meter, handler)
if err != nil {
return nil, err
}
handler = h
handler = tracer.NewHandler(params.Tracer, handler)
handler = szap.NewHandler(params.Logger, handler)
handler = meta.NewHandler(handler)
server := &Server{
Mux: mux,
server: &http.Server{Handler: handler, ReadHeaderTimeout: time.Timeout},
params: params,
}
return server, nil
}
// Start the server.
func (s *Server) Start(listener net.Listener) {
s.params.Logger.Info("starting http server", zap.String("addr", listener.Addr().String()))
if err := s.server.Serve(listener); err != nil && !errors.Is(err, http.ErrServerClosed) {
fields := []zapcore.Field{zap.String("addr", listener.Addr().String()), zap.Error(err)}
if err := s.params.Shutdowner.Shutdown(); err != nil {
fields = append(fields, zap.NamedError("shutdown_error", err))
}
s.params.Logger.Error("could not start http server", fields...)
}
}
// Stop the server.
func (s *Server) Stop(ctx context.Context) {
s.params.Logger.Info("stopping http server", zap.Error(s.server.Shutdown(ctx)))
}
func customMatcher(key string) (string, bool) {
switch key {
case "Request-Id", "Authorization", "Geolocation":
return key, true
case "User-Agent":
return "ua", true
case "X-Forwarded-For":
return "forwarded-for", true
default:
return runtime.DefaultHeaderMatcher(key)
}
}