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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/security"
"github.com/alexfalkowski/go-service/server"
"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"
tm "github.com/alexfalkowski/go-service/transport/meta"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"github.com/urfave/negroni/v3"
"go.opentelemetry.io/otel/metric"
"go.uber.org/fx"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"google.golang.org/protobuf/encoding/protojson"
)
// ServerParams for HTTP.
type ServerParams struct {
fx.In
Shutdowner fx.Shutdowner
Config *Config
Logger *zap.Logger
Tracer tracer.Tracer
Meter metric.Meter
Handlers []negroni.Handler
}
// Server for HTTP.
type Server struct {
Mux *runtime.ServeMux
server *http.Server
sh fx.Shutdowner
config *Config
logger *zap.Logger
list net.Listener
}
// ServerHandlers for HTTP.
func ServerHandlers() []negroni.Handler {
return nil
}
// NewServer for HTTP.
func NewServer(params ServerParams) (*Server, error) {
m, err := metrics.NewHandler(params.Meter)
if err != nil {
return nil, err
}
l, err := listener(params.Config)
if err != nil {
return nil, err
}
opts := []runtime.ServeMuxOption{
runtime.WithIncomingHeaderMatcher(customMatcher),
runtime.WithMarshalerOption(runtime.MIMEWildcard, &runtime.JSONPb{
MarshalOptions: protojson.MarshalOptions{
UseProtoNames: true,
},
UnmarshalOptions: protojson.UnmarshalOptions{
DiscardUnknown: true,
},
}),
}
n := negroni.New()
n.Use(meta.NewHandler(UserAgent(params.Config)))
n.Use(tracer.NewHandler(params.Tracer))
n.Use(szap.NewHandler(params.Logger))
n.Use(m)
for _, hd := range params.Handlers {
n.Use(hd)
}
n.Use(cors.New())
mux := runtime.NewServeMux(opts...)
n.UseHandler(mux)
s := &http.Server{
Handler: n,
ReadTimeout: time.Timeout,
WriteTimeout: time.Timeout,
IdleTimeout: time.Timeout,
ReadHeaderTimeout: time.Timeout,
}
server := &Server{
Mux: mux,
server: s,
sh: params.Shutdowner,
config: params.Config,
logger: params.Logger,
list: l,
}
return server, nil
}
// Start the server.
func (s *Server) Start() {
if s.list == nil {
return
}
go s.start()
}
// Stop the server.
func (s *Server) Stop(ctx context.Context) {
if s.list == nil {
return
}
message := "stopping server"
err := s.server.Shutdown(ctx)
if err != nil {
s.logger.Error(message, zap.Error(err), zap.String(tm.ServiceKey, "http"))
} else {
s.logger.Info(message, zap.String(tm.ServiceKey, "http"))
}
}
func (s *Server) start() {
s.logger.Info("starting server", zap.Stringer("addr", s.list.Addr()), zap.String(tm.ServiceKey, "http"))
if err := s.serve(s.list); err != nil && !errors.Is(err, http.ErrServerClosed) {
fields := []zapcore.Field{zap.Stringer("addr", s.list.Addr()), zap.Error(err), zap.String(tm.ServiceKey, "http")}
if err := s.sh.Shutdown(); err != nil {
fields = append(fields, zap.NamedError("shutdown_error", err))
}
s.logger.Error("could not start server", fields...)
}
}
func (s *Server) serve(l net.Listener) error {
if IsEnabled(s.config) && security.IsEnabled(s.config.Security) {
return s.server.ServeTLS(l, s.config.Security.CertFile, s.config.Security.KeyFile)
}
return s.server.Serve(l)
}
func listener(cfg *Config) (net.Listener, error) {
if !IsEnabled(cfg) {
return nil, nil
}
return server.Listener(cfg.Port)
}
func customMatcher(key string) (string, bool) {
switch key {
case "Request-Id", "Geolocation", "X-Forwarded-For":
return key, true
default:
return runtime.DefaultHeaderMatcher(key)
}
}