69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
// Command gunk-example-server-gw is a grpc-gateway example implementation for
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// the gunk-example-server.
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package main
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import (
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"context"
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"flag"
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"fmt"
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"io"
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"net"
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"net/http"
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"os"
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"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
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codequestpb "github.com/hhhapz/codequest/api/v1"
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"github.com/kenshaw/redoc"
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"google.golang.org/grpc"
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"google.golang.org/grpc/grpclog"
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)
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func main() {
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addr := flag.String("l", "0.0.0.0:8080", "listen address")
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endpoint := flag.String("endpoint", "localhost:10000", "grpc endpoint")
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flag.Parse()
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if err := run(context.Background(), *addr, *endpoint); err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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os.Exit(1)
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}
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}
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// run creates and runs the gateway instance.
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func run(ctx context.Context, addr, endpoint string) error {
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// build gateway mux
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gw, opts := runtime.NewServeMux(), []grpc.DialOption{grpc.WithInsecure()}
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for _, f := range []func(context.Context, *runtime.ServeMux, string, []grpc.DialOption) error{
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codequestpb.RegisterAuthServiceHandlerFromEndpoint,
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codequestpb.RegisterUserServiceHandlerFromEndpoint,
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} {
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if err := f(ctx, gw, endpoint, opts); err != nil {
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return err
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}
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}
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// build mux
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mux := http.NewServeMux()
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// handle swagger
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mux.HandleFunc("/v1/swagger.json", func(res http.ResponseWriter, req *http.Request) {
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res.Header().Set("Content-Type", "application/json")
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_, _ = res.Write(codequestpb.Swagger)
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})
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// handle gateway
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mux.Handle("/v1/", gw)
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// add redoc
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if err := redoc.New("/v1/swagger.json", "/", redoc.WithServeMux(mux)).Build(ctx, nil); err != nil {
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return err
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}
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log := grpclog.NewLoggerV2(os.Stderr, io.Discard, os.Stderr)
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grpclog.SetLoggerV2(log)
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log.Info("Serving gateway on http://", addr)
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// listen and serve
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l, err := (&net.ListenConfig{}).Listen(ctx, "tcp", addr)
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if err != nil {
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return err
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}
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defer l.Close()
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return http.Serve(l, mux)
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}
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