155 lines
3.6 KiB
Go
155 lines
3.6 KiB
Go
package main
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import (
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"io"
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"log"
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"net"
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"os"
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"path/filepath"
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"time"
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"github.com/pkg/sftp"
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"golang.org/x/crypto/ssh"
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)
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func translateRaspiName(targetName string, cfg RaspiConfig) (string, string, string, string) {
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for _, n := range cfg.Raspis {
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if targetName == "" {
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break
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}
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if n.Name == targetName {
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// Found!
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return n.Hostname, n.Port, n.Username, n.Password
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}
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}
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return "", "", "", ""
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}
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func createSSHClient(targetName string, cfg RaspiConfig) (*ssh.Client, error) {
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hostname, port, username, password := translateRaspiName(targetName, cfg)
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log.Println("Connecting to:", hostname, port)
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config := &ssh.ClientConfig{
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User: username,
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Auth: []ssh.AuthMethod{
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ssh.Password(password),
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},
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HostKeyCallback: ssh.InsecureIgnoreHostKey(), // OK for internal tools (and me in production)
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Timeout: 3 * time.Second,
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}
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connAddr := net.JoinHostPort(hostname, port)
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return ssh.Dial("tcp", connAddr, config)
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}
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func runSSHCommand(client *ssh.Client, cmd string) ([]byte, error) {
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session, err := client.NewSession()
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if err != nil {
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return nil, err
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}
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defer session.Close()
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return session.CombinedOutput(cmd)
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}
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func verifyCred(targetName string, cfg RaspiConfig) bool {
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sshClient, err := createSSHClient(targetName, cfg)
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if err != nil {
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log.Printf("Err occurred %v", err)
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return false
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}
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defer sshClient.Close()
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log.Println("Successfully verified the credentials")
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return true
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}
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func sftpUploadFile(targetName, localPath, remotePath string, cfg RaspiConfig) bool {
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const clearDirectory string = "rm /opt/raspscreen/media/*"
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sshClient, err := createSSHClient(targetName, cfg)
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fExt := filepath.Ext(localPath)
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remotePath = remotePath + fExt
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if err != nil {
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log.Printf("Failed to init the SSH connection %v", err)
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return false
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}
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defer sshClient.Close()
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sftpClient, err := sftp.NewClient(sshClient)
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if err != nil {
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log.Printf("Failed to start SFTP: %v", err)
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return false
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}
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defer sftpClient.Close()
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localFile, err := os.Open(localPath)
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if err != nil {
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log.Printf("Failed to open local file: %v", err)
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return false
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}
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defer localFile.Close()
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log.Println("Clearing directory")
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_, err = runSSHCommand(sshClient, clearDirectory)
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remoteFile, err := sftpClient.Create(remotePath)
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if err != nil {
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log.Printf("Failed to open remote file handle: %v", err)
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return false
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}
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log.Println("Uploading file")
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bytesCopied, err := io.Copy(remoteFile, localFile)
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if err != nil {
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log.Printf("Failed to copy local file to the remote location: %v", err)
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return false
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}
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log.Printf("Succesfully uploaded %d bytes to %s", bytesCopied, remotePath)
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return true
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}
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func restartShow(targetName string, targetMode int, cfg RaspiConfig) bool {
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const switchCmd string = "/opt/raspscreen/bin/manage.sh switch-state " // add a blank/whitespace at the end to make the formatting valid for manage.sh
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var err error
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sshClient, err := createSSHClient(targetName, cfg)
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if err != nil {
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log.Printf("Failed to init the SSH connection: %v", err)
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return false
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}
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defer sshClient.Close()
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session, err := sshClient.NewSession()
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if err != nil {
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log.Printf("Failed to create session over the connection: %v", err)
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return false
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}
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defer session.Close()
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var servName string
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switch targetMode {
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case 1:
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servName = "presentation"
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case 2:
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servName = "video"
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}
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log.Println("Configuring application workflow:", servName)
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stitchCmd := switchCmd + servName
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_, err = runSSHCommand(sshClient, stitchCmd)
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if err != nil {
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log.Printf("Failed to restart the show over SSH: %v", err)
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return false
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}
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log.Println("Done reloading program!")
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return true
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}
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