README_eng.md

gowebssh

中文文档 README

Webssh implemented by github.com/gorilla/websocket and golang.org/x/crypto/ssh, which supports ansi color and tab button for automatic completion command.

Reference resources: https://github.com/myml/webssh , on the basis of the original project, add public key login, zmodem upload and download file(support disabling sz or rz)

Server

quick start

...
import (
    ...

    "github.com/gorilla/websocket"
    "github.com/leffss/gowebssh"
)
...
id := r.Header.Get("Sec-WebSocket-Key")
webssh := gowebssh.NewWebSSH()
webssh.SetTerm(gowebssh.TermLinux)
webssh.SetBuffSize(8192)
webssh.SetId(id)
webssh.SetConnTimeOut(15 * time.Second)
webssh.DisableSZ()
//webssh.DisableRZ()
...
upGrader := websocket.Upgrader{
    CheckOrigin: func(r *http.Request) bool {
        return true
    },
    //Subprotocols: []string{r.Header.Get("Sec-WebSocket-Protocol")},
    Subprotocols: []string{"webssh"},
    ReadBufferSize: 8192,
    WriteBufferSize: 8192,
}
ws, _ := upGrader.Upgrade(w, r, nil)
webssh.AddWebsocket(ws)

Client

message type

type messageType string

const (
	messageTypeAddr      = "addr"
	messageTypeTerm      = "term"
	messageTypeLogin     = "login"
	messageTypePassword  = "password"
	messageTypePublickey = "publickey"
	messageTypeStdin     = "stdin"
	messageTypeStdout    = "stdout"
	messageTypeStderr    = "stderr"
	messageTypeResize    = "resize"
	messageTypeIgnore    = "ignore"
	messageTypeConsole   = "console"
)

type message struct {
	Type messageType  `json:"type"`
	Data []byte       `json:"data,omitempty"`
	Cols int          `json:"cols,omitempty"`
	Rows int          `json:"rows,omitempty"`
}

message

1. address {type:"addr",data:"$addr"}
   format： ip:port ，like 192.168.223.111:22
2. login {type:"login",data:"$username"}
3. set term type {type:"term",data:"$term"} # default xterm
4. auth {type:"password",data:"$password"} or {type:"publickey",data:"$publickey"}
5. resize window {type:"resize",cols:40,rows:80}
6. ignore data stream {type:"ignore",data:"$data"} # client send to server，server will ignore，could use for zmodem file transmission record
7. console stream {type:"console",data:"$data"} # server send to client, client display it on the web browser console, could use for debug zmodem file transmission
8. alert stream {type:"alert",data:"$data"} # server send to client, alert message
9. standard stream data
   {type:"stdin",data:"$data"} {type:"stdout",data:"$data"} {type:"stderr",data:"$data"}
   client send stdin data, receive stdout, stderr data

Data transmission

use base64 encoding during transmission

function utf8_to_b64(rawString) {
  return btoa(unescape(encodeURIComponent(rawString)));
}

function b64_to_utf8(encodeString) {
  return decodeURIComponent(escape(atob(encodeString)));
}

Example

check in example path

Preview