50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
package connection
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import (
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"context"
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"fmt"
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"time"
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rpc "zombiezen.com/go/capnproto2/rpc"
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"github.com/cloudflare/cloudflared/h2mux"
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"github.com/cloudflare/cloudflared/logger"
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"github.com/cloudflare/cloudflared/tunnelrpc"
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tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs"
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)
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// NewRPCClient creates and returns a new RPC client, which will communicate
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// using a stream on the given muxer
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func NewRPCClient(
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ctx context.Context,
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muxer *h2mux.Muxer,
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logger logger.Service,
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openStreamTimeout time.Duration,
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) (client tunnelpogs.TunnelServer_PogsClient, err error) {
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openStreamCtx, openStreamCancel := context.WithTimeout(ctx, openStreamTimeout)
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defer openStreamCancel()
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stream, err := muxer.OpenRPCStream(openStreamCtx)
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if err != nil {
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return
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}
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if !isRPCStreamResponse(stream.Headers) {
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stream.Close()
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err = fmt.Errorf("rpc: bad response headers: %v", stream.Headers)
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return
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}
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conn := rpc.NewConn(
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tunnelrpc.NewTransportLogger(logger, rpc.StreamTransport(stream)),
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tunnelrpc.ConnLog(logger),
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)
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client = tunnelpogs.TunnelServer_PogsClient{Client: conn.Bootstrap(ctx), Conn: conn}
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return client, nil
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}
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func isRPCStreamResponse(headers []h2mux.Header) bool {
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return len(headers) == 1 &&
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headers[0].Name == ":status" &&
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headers[0].Value == "200"
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}
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