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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package proxy | ||
|
|
||
| import ( | ||
| "context" | ||
| "crypto/tls" | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
| "net/url" | ||
|
|
||
| "github.com/fabiolb/fabio/config" | ||
| "github.com/fabiolb/fabio/route" | ||
| grpc_proxy "github.com/mwitkow/grpc-proxy/proxy" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/credentials" | ||
| "google.golang.org/grpc/metadata" | ||
| ) | ||
|
|
||
| type GRPCServer struct { | ||
| server *grpc.Server | ||
| } | ||
|
|
||
| func (s *GRPCServer) Close() error { | ||
| s.server.Stop() | ||
| return nil | ||
| } | ||
|
|
||
| func (s *GRPCServer) Shutdown(ctx context.Context) error { | ||
| s.server.GracefulStop() | ||
| return nil | ||
| } | ||
|
|
||
| func (s *GRPCServer) Serve(lis net.Listener) error { | ||
| return s.server.Serve(lis) | ||
| } | ||
|
|
||
| func GetGRPCDirector(cfg *config.Config, tlscfg *tls.Config) func(ctx context.Context, fullMethodName string) (context.Context, *grpc.ClientConn, error) { | ||
|
|
||
| pick := route.Picker[cfg.Proxy.Strategy] | ||
| match := route.Matcher[cfg.Proxy.Matcher] | ||
|
|
||
| return func(ctx context.Context, fullMethodName string) (context.Context, *grpc.ClientConn, error) { | ||
| md, ok := metadata.FromIncomingContext(ctx) | ||
|
|
||
| if !ok { | ||
| return ctx, nil, fmt.Errorf("error extracting metadata from request") | ||
| } | ||
|
|
||
| reqUrl, err := url.ParseRequestURI(fullMethodName) | ||
|
|
||
| if err != nil { | ||
| return ctx, nil, fmt.Errorf("error parsing request url") | ||
| } | ||
|
|
||
| headers := http.Header{} | ||
|
|
||
| for k, v := range md { | ||
| for _, h := range v { | ||
| headers.Add(k, h) | ||
| } | ||
| } | ||
|
|
||
| req := &http.Request{ | ||
| Host: "", | ||
| URL: reqUrl, | ||
| Header: headers, | ||
| } | ||
|
|
||
| target := route.GetTable().Lookup(req, req.Header.Get("trace"), pick, match, cfg.GlobMatchingDisabled) | ||
|
|
||
| if target == nil { | ||
| return nil, nil, fmt.Errorf("no route found") | ||
| } | ||
|
|
||
| opts := []grpc.DialOption{ | ||
| grpc.WithDefaultCallOptions(grpc.CallCustomCodec(grpc_proxy.Codec())), | ||
| } | ||
|
|
||
| if target.URL.Scheme == "grpcs" && tlscfg != nil { | ||
| opts = append(opts, grpc.WithTransportCredentials( | ||
| credentials.NewTLS(&tls.Config{ClientCAs: tlscfg.ClientCAs, InsecureSkipVerify: target.TLSSkipVerify}))) | ||
| } | ||
|
|
||
| newCtx := context.Background() | ||
| conn, err := grpc.DialContext(newCtx, target.URL.Host, opts...) | ||
|
|
||
| return newCtx, conn, err | ||
| } | ||
| } |
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