mirror of
https://github.com/hexolan/stocklet.git
synced 2026-03-26 19:51:17 +00:00
115 lines
3.4 KiB
Go
115 lines
3.4 KiB
Go
// Copyright (C) 2024 Declan Teevan
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
package serve
|
|
|
|
import (
|
|
"context"
|
|
"net/http"
|
|
|
|
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
|
|
"github.com/rs/zerolog/log"
|
|
"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
|
|
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
|
|
"google.golang.org/grpc"
|
|
"google.golang.org/grpc/credentials/insecure"
|
|
"google.golang.org/grpc/metadata"
|
|
|
|
"github.com/hexolan/stocklet/internal/pkg/config"
|
|
"github.com/hexolan/stocklet/internal/pkg/gwauth"
|
|
)
|
|
|
|
func withGatewayErrorHandler() runtime.ServeMuxOption {
|
|
return runtime.WithErrorHandler(
|
|
func(ctx context.Context, mux *runtime.ServeMux, marshaler runtime.Marshaler, w http.ResponseWriter, r *http.Request, err error) {
|
|
runtime.DefaultHTTPErrorHandler(ctx, mux, marshaler, w, r, err)
|
|
log.Error().Err(err).Stack().Str("path", r.URL.Path).Str("reqURI", r.RequestURI).Str("remoteAddr", r.RemoteAddr).Msg("")
|
|
},
|
|
)
|
|
}
|
|
|
|
func withGatewayMetadataOpt() runtime.ServeMuxOption {
|
|
return runtime.WithMetadata(
|
|
func(ctx context.Context, req *http.Request) metadata.MD {
|
|
return metadata.MD{"from-gateway": {"true"}}
|
|
},
|
|
)
|
|
}
|
|
|
|
func withGatewayHeaderOpt() runtime.ServeMuxOption {
|
|
return runtime.WithIncomingHeaderMatcher(
|
|
func(key string) (string, bool) {
|
|
switch key {
|
|
case gwauth.JWTPayloadHeader:
|
|
// Envoy will validate JWT tokens and provide a payload header
|
|
// containing a base64 string of the token claims.
|
|
return "jwt-payload", true
|
|
default:
|
|
return key, false
|
|
}
|
|
},
|
|
)
|
|
}
|
|
|
|
func withGatewayLogger(h http.Handler) http.Handler {
|
|
return http.HandlerFunc(
|
|
func(w http.ResponseWriter, r *http.Request) {
|
|
h.ServeHTTP(w, r)
|
|
log.Info().Str("path", r.URL.Path).Str("reqURI", r.RequestURI).Str("remoteAddr", r.RemoteAddr).Msg("")
|
|
},
|
|
)
|
|
}
|
|
|
|
func NewGatewayServeBase(cfg *config.SharedConfig) (*runtime.ServeMux, []grpc.DialOption) {
|
|
// Create the base runtime ServeMux
|
|
mux := runtime.NewServeMux(
|
|
withGatewayErrorHandler(),
|
|
withGatewayMetadataOpt(),
|
|
withGatewayHeaderOpt(),
|
|
)
|
|
|
|
// Attach open telemetry instrumentation through the gRPC client options
|
|
clientOpts := []grpc.DialOption{
|
|
grpc.WithStatsHandler(
|
|
otelgrpc.NewClientHandler(),
|
|
),
|
|
|
|
grpc.WithTransportCredentials(insecure.NewCredentials()),
|
|
}
|
|
|
|
return mux, clientOpts
|
|
}
|
|
|
|
func Gateway(mux *runtime.ServeMux) error {
|
|
// Create OTEL instrumentation handler
|
|
handler := otelhttp.NewHandler(
|
|
mux,
|
|
"grpc-gateway",
|
|
otelhttp.WithSpanNameFormatter(
|
|
func(operation string, r *http.Request) string {
|
|
return operation + ": " + r.RequestURI
|
|
},
|
|
),
|
|
)
|
|
|
|
// Create gateway HTTP server
|
|
svr := &http.Server{
|
|
Addr: GetAddrToGateway("0.0.0.0"),
|
|
Handler: withGatewayLogger(handler),
|
|
}
|
|
|
|
return svr.ListenAndServe()
|
|
}
|