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$SFBUF44).BOBHFS XJUI(P Shota Inoue Go (Un) Conference #1

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I’m Shota Inoue (@syossan27) Golang Beginner
 
 ʕ ◔ϖ◔ʔ < Write simple code !

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Create this

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Why? ɾOn business ɾCreate SSH Client with Go is simple!

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Feature ɾManage ssh connection informations ɾConnect using by connection information ɾCrypt for connection information by AES key ɾBash completion

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Search Github… Only this! But…

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Implement ssh client Use this package. golang.org/x/crypto/ssh golang.org/x/crypto/ssh/terminal

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1 client, err := ssh.Dial("tcp", "[email protected]") 2 session, err := client.NewSession() 3 fd := int(os.Stdin.Fd() 4 oldState, err := terminal.MakeRaw(fd)) 5 session.Stdout = os.Stdout 6 session.Stderr = os.Stderr 7 session.Stdin = os.Stdin 8 modes := ssh.TerminalModes{ 9 ssh.ECHO: 1, 10 ssh.TTY_OP_ISPEED: 14400, 11 ssh.TTY_OP_OSPEED: 14400, 12 } 13 err = session.RequestPty("xterm-256color", h, w, modes) 14 err = session.Shell() 15 err = session.Wait() Can implement by 15 line !

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! Important processing 3 fd := int(os.Stdin.Fd() 4 oldState, err := terminal.MakeRaw(fd)) Important to exec ssh terminal in raw mode. If execute ssh terminal in cooked mode, buffering input. Therefore not work editor etc...

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Manage connection informations 1. Input connection information 2. Crypt for using by AES key 
 (ex. ~/.ssh/id_rsa) 3. Write to file

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Another way… Use boltdb for store connection informations. but…

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Bash completion Put bash_completion file by manual operation is easily, but it is not cool ! Therefore…

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1 completionFileContent := ` 2 _cli_bash_autocomplete() { 3 local cur opts base 4 COMPREPLY=() 5 cur="${COMP_WORDS[COMP_CWORD]}" 6 opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} --generate-bash- completion ) 7 COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) ) 8 return 0 9 } 10 complete -F _cli_bash_autocomplete en 11 ` 12 13 f, err := os.Create(completionFile) 14 _, err = f.Write([]byte(completionFileContent)) 15 16 loadConfigFileContent := "if [ -f '/etc/bash_completion.d/en' ]; then source '/etc/bash_completion.d/en'; fi” 17 18 f, err := os.OpenFile(“~/.bashrc”, os.O_APPEND|os.O_WRONLY, 0600) 19 fmt.Fprintln(f, loadConfigFileContent)

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ʕ ◔ϖ◔ʔ < Go is God Fin.