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package gateway
import (
"context"
"fmt"
"net"
"net/http"
"google.golang.org/grpc/credentials/insecure"
"github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/proto/examplepb"
standalone "github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/proto/standalone"
gwruntime "github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
_ "google.golang.org/genproto/googleapis/rpc/errdetails"
"google.golang.org/grpc"
)
// newGateway returns a new gateway server which translates HTTP into gRPC.
func newGateway(ctx context.Context, conn *grpc.ClientConn, opts []gwruntime.ServeMuxOption) (http.Handler, error) {
mux := gwruntime.NewServeMux(opts...)
for _, f := range []func(context.Context, *gwruntime.ServeMux, *grpc.ClientConn) error{
examplepb.RegisterEchoServiceHandler,
standalone.RegisterUnannotatedEchoServiceHandler,
examplepb.RegisterStreamServiceHandler,
examplepb.RegisterABitOfEverythingServiceHandler,
examplepb.RegisterFlowCombinationHandler,
examplepb.RegisterNonStandardServiceHandler,
examplepb.RegisterResponseBodyServiceHandler,
} {
if err := f(ctx, mux, conn); err != nil {
return nil, err
}
}
return mux, nil
}
func dial(network, addr string) (*grpc.ClientConn, error) {
switch network {
case "tcp":
return dialTCP(addr)
case "unix":
return dialUnix(addr)
default:
return nil, fmt.Errorf("unsupported network type %q", network)
}
}
// dialTCP creates a client connection via TCP.
// "addr" must be a valid TCP address with a port number.
func dialTCP(addr string) (*grpc.ClientConn, error) {
return grpc.NewClient(addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
}
// dialUnix creates a client connection via a unix domain socket.
// "addr" must be a valid path to the socket.
func dialUnix(addr string) (*grpc.ClientConn, error) {
d := func(ctx context.Context, addr string) (net.Conn, error) {
return (&net.Dialer{}).DialContext(ctx, "unix", addr)
}
return grpc.NewClient(addr, grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithContextDialer(d))
}
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