100 lines
2.5 KiB
Go
100 lines
2.5 KiB
Go
package docker
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import (
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"context"
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"crypto/tls"
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"fmt"
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"io/ioutil"
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"net"
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"net/http"
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"os"
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"path/filepath"
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"runtime"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/lib/atexit"
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)
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// Server connects plugin with docker daemon by protocol
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type Server http.Server
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// NewServer creates new docker plugin server
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func NewServer(drv *Driver) *Server {
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return &Server{Handler: newRouter(drv)}
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}
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// Shutdown the server
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func (s *Server) Shutdown(ctx context.Context) error {
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hs := (*http.Server)(s)
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return hs.Shutdown(ctx)
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}
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func (s *Server) serve(listener net.Listener, addr, tempFile string) error {
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if tempFile != "" {
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atexit.Register(func() {
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// remove spec file or self-created unix socket
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fs.Debugf(nil, "Removing stale file %s", tempFile)
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_ = os.Remove(tempFile)
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})
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}
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hs := (*http.Server)(s)
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return hs.Serve(listener)
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}
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// ServeUnix makes the handler to listen for requests in a unix socket.
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// It also creates the socket file in the right directory for docker to read.
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func (s *Server) ServeUnix(path string, gid int) error {
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listener, socketPath, err := newUnixListener(path, gid)
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if err != nil {
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return err
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}
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if socketPath != "" {
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path = socketPath
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fs.Infof(nil, "Serving unix socket: %s", path)
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} else {
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fs.Infof(nil, "Serving systemd socket")
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}
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return s.serve(listener, path, socketPath)
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}
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// ServeTCP makes the handler listen for request on a given TCP address.
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// It also writes the spec file in the right directory for docker to read.
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func (s *Server) ServeTCP(addr, specDir string, tlsConfig *tls.Config, noSpec bool) error {
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listener, err := net.Listen("tcp", addr)
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if err != nil {
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return err
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}
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if tlsConfig != nil {
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tlsConfig.NextProtos = []string{"http/1.1"}
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listener = tls.NewListener(listener, tlsConfig)
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}
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addr = listener.Addr().String()
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specFile := ""
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if !noSpec {
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specFile, err = writeSpecFile(addr, "tcp", specDir)
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if err != nil {
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return err
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}
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}
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fs.Infof(nil, "Serving TCP socket: %s", addr)
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return s.serve(listener, addr, specFile)
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}
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func writeSpecFile(addr, proto, specDir string) (string, error) {
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if specDir == "" && runtime.GOOS == "windows" {
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specDir = os.TempDir()
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}
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if specDir == "" {
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specDir = defSpecDir
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}
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if err := os.MkdirAll(specDir, 0755); err != nil {
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return "", err
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}
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specFile := filepath.Join(specDir, "rclone.spec")
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url := fmt.Sprintf("%s://%s", proto, addr)
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if err := ioutil.WriteFile(specFile, []byte(url), 0644); err != nil {
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return "", err
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}
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fs.Debugf(nil, "Plugin spec has been written to %s", specFile)
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return specFile, nil
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}
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