/
communicator.go
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/
communicator.go
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package winrm
import (
"fmt"
"io"
"log"
"os"
"sync"
"github.com/masterzen/winrm/winrm"
"github.com/mitchellh/packer/packer"
"github.com/packer-community/winrmcp/winrmcp"
// This import is a bit strange, but it's needed so `make updatedeps`
// can see and download it
_ "github.com/dylanmei/winrmtest"
)
// Communicator represents the WinRM communicator
type Communicator struct {
config *Config
client *winrm.Client
endpoint *winrm.Endpoint
}
// New creates a new communicator implementation over WinRM.
func New(config *Config) (*Communicator, error) {
endpoint := &winrm.Endpoint{
Host: config.Host,
Port: config.Port,
HTTPS: config.Https,
Insecure: config.Insecure,
/*
TODO
HTTPS: connInfo.HTTPS,
Insecure: connInfo.Insecure,
CACert: connInfo.CACert,
*/
}
// Create the client
params := winrm.DefaultParameters()
if config.TransportDecorator != nil {
params.TransportDecorator = config.TransportDecorator
}
params.Timeout = formatDuration(config.Timeout)
client, err := winrm.NewClientWithParameters(
endpoint, config.Username, config.Password, params)
if err != nil {
return nil, err
}
// Create the shell to verify the connection
log.Printf("[DEBUG] connecting to remote shell using WinRM")
shell, err := client.CreateShell()
if err != nil {
log.Printf("[ERROR] connection error: %s", err)
return nil, err
}
if err := shell.Close(); err != nil {
log.Printf("[ERROR] error closing connection: %s", err)
return nil, err
}
return &Communicator{
config: config,
client: client,
endpoint: endpoint,
}, nil
}
// Start implementation of communicator.Communicator interface
func (c *Communicator) Start(rc *packer.RemoteCmd) error {
shell, err := c.client.CreateShell()
if err != nil {
return err
}
log.Printf("[INFO] starting remote command: %s", rc.Command)
cmd, err := shell.Execute(rc.Command)
if err != nil {
return err
}
go runCommand(shell, cmd, rc)
return nil
}
func runCommand(shell *winrm.Shell, cmd *winrm.Command, rc *packer.RemoteCmd) {
defer shell.Close()
var wg sync.WaitGroup
copyFunc := func(w io.Writer, r io.Reader) {
defer wg.Done()
io.Copy(w, r)
}
if rc.Stdout != nil && cmd.Stdout != nil {
wg.Add(1)
go copyFunc(rc.Stdout, cmd.Stdout)
} else {
log.Printf("[WARN] Failed to read stdout for command '%s'", rc.Command)
}
if rc.Stderr != nil && cmd.Stderr != nil {
wg.Add(1)
go copyFunc(rc.Stderr, cmd.Stderr)
} else {
log.Printf("[WARN] Failed to read stderr for command '%s'", rc.Command)
}
cmd.Wait()
wg.Wait()
code := cmd.ExitCode()
log.Printf("[INFO] command '%s' exited with code: %d", rc.Command, code)
rc.SetExited(code)
}
// Upload implementation of communicator.Communicator interface
func (c *Communicator) Upload(path string, input io.Reader, _ *os.FileInfo) error {
wcp, err := c.newCopyClient()
if err != nil {
return err
}
log.Printf("Uploading file to '%s'", path)
return wcp.Write(path, input)
}
// UploadDir implementation of communicator.Communicator interface
func (c *Communicator) UploadDir(dst string, src string, exclude []string) error {
log.Printf("Uploading dir '%s' to '%s'", src, dst)
wcp, err := c.newCopyClient()
if err != nil {
return err
}
return wcp.Copy(src, dst)
}
func (c *Communicator) Download(src string, dst io.Writer) error {
return fmt.Errorf("WinRM doesn't support download.")
}
func (c *Communicator) DownloadDir(src string, dst string, exclude []string) error {
return fmt.Errorf("WinRM doesn't support download dir.")
}
func (c *Communicator) newCopyClient() (*winrmcp.Winrmcp, error) {
addr := fmt.Sprintf("%s:%d", c.endpoint.Host, c.endpoint.Port)
return winrmcp.New(addr, &winrmcp.Config{
Auth: winrmcp.Auth{
User: c.config.Username,
Password: c.config.Password,
},
Https: c.config.Https,
Insecure: c.config.Insecure,
OperationTimeout: c.config.Timeout,
MaxOperationsPerShell: 15, // lowest common denominator
TransportDecorator: c.config.TransportDecorator,
})
}