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package gitaly
import (
"context"
"fmt"
"io"
gitalyclient "gitlab.com/gitlab-org/gitaly/v14/client"
"gitlab.com/gitlab-org/gitaly/v14/proto/go/gitalypb"
"gitlab.com/gitlab-org/gitaly/v14/streamio"
)
type SmartHTTPClient struct {
useSidechannel bool
sidechannelRegistry *gitalyclient.SidechannelRegistry
gitalypb.SmartHTTPServiceClient
}
func (client *SmartHTTPClient) InfoRefsResponseReader(ctx context.Context, repo *gitalypb.Repository, rpc string, gitConfigOptions []string, gitProtocol string) (io.Reader, error) {
rpcRequest := &gitalypb.InfoRefsRequest{
Repository: repo,
GitConfigOptions: gitConfigOptions,
GitProtocol: gitProtocol,
}
switch rpc {
case "git-upload-pack":
stream, err := client.InfoRefsUploadPack(ctx, rpcRequest)
return infoRefsReader(stream), err
case "git-receive-pack":
stream, err := client.InfoRefsReceivePack(ctx, rpcRequest)
return infoRefsReader(stream), err
default:
return nil, fmt.Errorf("InfoRefsResponseWriterTo: Unsupported RPC: %q", rpc)
}
}
type infoRefsClient interface {
Recv() (*gitalypb.InfoRefsResponse, error)
}
func infoRefsReader(stream infoRefsClient) io.Reader {
return streamio.NewReader(func() ([]byte, error) {
resp, err := stream.Recv()
return resp.GetData(), err
})
}
func (client *SmartHTTPClient) ReceivePack(ctx context.Context, repo *gitalypb.Repository, glId string, glUsername string, glRepository string, gitConfigOptions []string, clientRequest io.Reader, clientResponse io.Writer, gitProtocol string) error {
stream, err := client.PostReceivePack(ctx)
if err != nil {
return err
}
rpcRequest := &gitalypb.PostReceivePackRequest{
Repository: repo,
GlId: glId,
GlUsername: glUsername,
GlRepository: glRepository,
GitConfigOptions: gitConfigOptions,
GitProtocol: gitProtocol,
}
if err := stream.Send(rpcRequest); err != nil {
return fmt.Errorf("initial request: %v", err)
}
numStreams := 2
errC := make(chan error, numStreams)
go func() {
rr := streamio.NewReader(func() ([]byte, error) {
response, err := stream.Recv()
return response.GetData(), err
})
_, err := io.Copy(clientResponse, rr)
errC <- err
}()
go func() {
sw := streamio.NewWriter(func(data []byte) error {
return stream.Send(&gitalypb.PostReceivePackRequest{Data: data})
})
_, err := io.Copy(sw, clientRequest)
stream.CloseSend()
errC <- err
}()
for i := 0; i < numStreams; i++ {
if err := <-errC; err != nil {
return err
}
}
return nil
}
func (client *SmartHTTPClient) UploadPack(ctx context.Context, repo *gitalypb.Repository, clientRequest io.Reader, clientResponse io.Writer, gitConfigOptions []string, gitProtocol string) error {
if client.useSidechannel {
return client.runUploadPackWithSidechannel(ctx, repo, clientRequest, clientResponse, gitConfigOptions, gitProtocol)
}
return client.runUploadPack(ctx, repo, clientRequest, clientResponse, gitConfigOptions, gitProtocol)
}
func (client *SmartHTTPClient) runUploadPack(ctx context.Context, repo *gitalypb.Repository, clientRequest io.Reader, clientResponse io.Writer, gitConfigOptions []string, gitProtocol string) error {
stream, err := client.PostUploadPack(ctx)
if err != nil {
return err
}
rpcRequest := &gitalypb.PostUploadPackRequest{
Repository: repo,
GitConfigOptions: gitConfigOptions,
GitProtocol: gitProtocol,
}
if err := stream.Send(rpcRequest); err != nil {
return fmt.Errorf("initial request: %v", err)
}
numStreams := 2
errC := make(chan error, numStreams)
go func() {
rr := streamio.NewReader(func() ([]byte, error) {
response, err := stream.Recv()
return response.GetData(), err
})
_, err := io.Copy(clientResponse, rr)
errC <- err
}()
go func() {
sw := streamio.NewWriter(func(data []byte) error {
return stream.Send(&gitalypb.PostUploadPackRequest{Data: data})
})
_, err := io.Copy(sw, clientRequest)
stream.CloseSend()
errC <- err
}()
for i := 0; i < numStreams; i++ {
if err := <-errC; err != nil {
return err
}
}
return nil
}
func (client *SmartHTTPClient) runUploadPackWithSidechannel(ctx context.Context, repo *gitalypb.Repository, clientRequest io.Reader, clientResponse io.Writer, gitConfigOptions []string, gitProtocol string) error {
ctx, waiter := client.sidechannelRegistry.Register(ctx, func(conn gitalyclient.SidechannelConn) error {
if _, err := io.Copy(conn, clientRequest); err != nil {
return err
}
if err := conn.CloseWrite(); err != nil {
return fmt.Errorf("fail to signal sidechannel half-close: %w", err)
}
if _, err := io.Copy(clientResponse, conn); err != nil {
return err
}
return nil
})
defer waiter.Close()
rpcRequest := &gitalypb.PostUploadPackWithSidechannelRequest{
Repository: repo,
GitConfigOptions: gitConfigOptions,
GitProtocol: gitProtocol,
}
if _, err := client.PostUploadPackWithSidechannel(ctx, rpcRequest); err != nil {
return err
}
if err := waiter.Close(); err != nil {
return fmt.Errorf("fail to close sidechannel connection: %w", err)
}
return nil
}
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