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45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
package grpc // import "github.com/docker/docker/api/server/router/grpc"
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import (
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"context"
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"net/http"
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"github.com/pkg/errors"
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"golang.org/x/net/http2"
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)
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func (gr *grpcRouter) serveGRPC(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
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h, ok := w.(http.Hijacker)
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if !ok {
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return errors.New("handler does not support hijack")
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}
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proto := r.Header.Get("Upgrade")
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if proto == "" {
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return errors.New("no upgrade proto in request")
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}
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if proto != "h2c" {
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return errors.Errorf("protocol %s not supported", proto)
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}
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conn, _, err := h.Hijack()
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if err != nil {
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return err
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}
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resp := &http.Response{
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StatusCode: http.StatusSwitchingProtocols,
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: http.Header{},
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}
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resp.Header.Set("Connection", "Upgrade")
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resp.Header.Set("Upgrade", proto)
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// set raw mode
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conn.Write([]byte{})
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resp.Write(conn)
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// https://godoc.org/golang.org/x/net/http2#Server.ServeConn
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// TODO: is it a problem that conn has already been written to?
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gr.h2Server.ServeConn(conn, &http2.ServeConnOpts{Handler: gr.grpcServer})
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return nil
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}
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