/
docker.go
145 lines (124 loc) · 3.46 KB
/
docker.go
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package source
import (
"archive/tar"
"context"
"errors"
"io"
"os"
"path/filepath"
"strings"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
"github.com/zaigie/palworld-server-tool/internal/logger"
"github.com/zaigie/palworld-server-tool/internal/system"
)
func getDockerClient() (*client.Client, error) {
dockerAPIVersion := os.Getenv("DOCKER_API_VERSION")
if dockerAPIVersion == "" {
return client.NewClientWithOpts(client.FromEnv)
} else {
return client.NewClientWithOpts(client.FromEnv, client.WithVersion(dockerAPIVersion))
}
}
func CopyFromContainer(containerID, remotePath, way string) (string, error) {
logger.Infof("copying savDir from %s\n", remotePath)
ctx := context.Background()
cli, err := getDockerClient()
if err != nil {
return "", err
}
defer cli.Close()
savDir, err := getSavDir(containerID, remotePath, cli, ctx)
if err != nil {
return "", err
}
relatedSavHash := filepath.Base(savDir)
reader, _, err := cli.CopyFromContainer(ctx, containerID, savDir)
if err != nil {
return "", err
}
defer reader.Close()
tempDir := filepath.Join(os.TempDir(), "palworldsav-docker-"+way)
absPath, err := filepath.Abs(tempDir)
if err != nil {
return "", err
}
if err = system.CleanAndCreateDir(absPath); err != nil {
return "", err
}
tarReader := tar.NewReader(reader)
for {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
return "", err
}
path := filepath.Join(absPath, header.Name)
switch header.Typeflag {
case tar.TypeDir:
if err := os.MkdirAll(path, os.FileMode(header.Mode)); err != nil {
return "", err
}
case tar.TypeReg:
file, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
if err != nil {
return "", err
}
if _, err := io.Copy(file, tarReader); err != nil {
file.Close()
return "", err
}
file.Close()
}
}
levelFilePath := filepath.Join(absPath, relatedSavHash, "Level.sav")
return levelFilePath, nil
}
func getSavDir(containerID, path string, cli *client.Client, ctx context.Context) (string, error) {
execConfig := types.ExecConfig{
Cmd: []string{"find", path, "-name", "Level.sav"},
AttachStdout: true,
AttachStderr: true,
}
resp, err := cli.ContainerExecCreate(ctx, containerID, execConfig)
if err != nil {
return "", err
}
response, err := cli.ContainerExecAttach(ctx, resp.ID, types.ExecStartCheck{})
if err != nil {
return "", err
}
defer response.Close()
out, err := io.ReadAll(response.Reader)
if err != nil {
return "", err
}
levelFilePath, err := getValidFilePath(strings.TrimSpace(string(out)), path)
if err != nil {
return "", err
}
logger.Debugf("docker find Level.sav file: %s\n", levelFilePath)
if !strings.HasSuffix(levelFilePath, "Level.sav") {
return "", errors.New("file Level.sav not found")
}
return filepath.Dir(levelFilePath), nil
}
func getValidFilePath(output, expectedStart string) (string, error) {
startIndex := strings.Index(output, expectedStart)
if startIndex == -1 {
return "", errors.New("expected path not found in the output")
}
validPath := output[startIndex:]
return validPath, nil
}
func ParseDockerAddress(address string) (containerID, filePath string, err error) {
address = strings.TrimPrefix(address, "docker://")
parts := strings.SplitN(address, ":", 2)
if len(parts) != 2 {
return "", "", errors.New("invalid Docker address format")
}
containerID, filePath = parts[0], parts[1]
return containerID, filePath, nil
}