OpenREPL initially Forked from gotty. GoTTY is a simple command line tool that turns your CLI tools into web applications.
This Fork is intended to create web based REPL services for various programming languages using gotty and containers. You can checkout on our website for more info on REPL playgrounds and try them as well: openrepl.com (earlier gorepl.com)
Fork openrepl to start the REPL servers in your local system, Please make sure all pre-requisites are installed.
(Files named with darwin_amd64 are for Mac OS X users)
You can install GoTTY REPL server as shown below:
$ cd src
$ make all
$ ../bin/gotty -w$ cd src
$ make buildgo GOROOT_BOOTSTRAP=/usr/lib/go-x.xx/ (non x86_64 machines)
$ make deb
$ sudo dpkg -i ../deb/gotty.deb- GoTTY requires go1.9 or later.
- npm
- webpack
- cling
- gointerpreter
- python2.7
- xterm
- all requisites can be installed using ./install_prerequisite.sh
To deploy and run a local copy of openrepl :
-
Pull the Docker image
docker pull vickeykumar/openrepl:latest
-
Run the image
-
without nested containers.
docker run -itd --name openrepl \ -p 8080:8080 vickeykumar/openrepl:latest \ -p 8080
-
with nested containers (containerized REPLs inside docker, nested containers)
docker run -itd --name openrepl \ -v /sys/fs/cgroup:/sys/fs/cgroup:rw --privileged \ -p 8080:8080 vickeykumar/openrepl:latest \ -p 8080
-
-
open localhost:8080 in your browser to check repls offline
```bash
docker run -itd --name openrepl \
-v /sys/fs/cgroup:/sys/fs/cgroup:rw --privileged \
-p 8080:8080 vickeykumar/openrepl:latest \
-p 8080 [ <other CLI Options>]
```
Usage: gotty [options] <command> [<arguments...>]
Run gotty with your preferred command as its arguments (e.g. gotty top).
By default, GoTTY starts a web server at port 8080. Open the URL on your web browser and you can see the running command as if it were running on your terminal.
--address value, -a value IP address to listen (default: "0.0.0.0") [$GOTTY_ADDRESS]
--port value, -p value Port number to liten (default: "8080") [$GOTTY_PORT]
--permit-write, -w Permit clients to write to the TTY (BE CAREFUL) [$GOTTY_PERMIT_WRITE]
--credential value, -c value Credential for Basic Authentication (ex: user:pass, default disabled) [$GOTTY_CREDENTIAL]
--random-url, -r Add a random string to the URL [$GOTTY_RANDOM_URL]
--random-url-length value Random URL length (default: 8) [$GOTTY_RANDOM_URL_LENGTH]
--tls, -t Enable TLS/SSL [$GOTTY_TLS]
--tls-crt value TLS/SSL certificate file path (default: "~/.gotty.crt") [$GOTTY_TLS_CRT]
--tls-key value TLS/SSL key file path (default: "~/.gotty.key") [$GOTTY_TLS_KEY]
--tls-ca-crt value TLS/SSL CA certificate file for client certifications (default: "~/.gotty.ca.crt") [$GOTTY_TLS_CA_CRT]
--index value Custom index.html file [$GOTTY_INDEX]
--title-format value Title format of browser window (default: "{{ .command }}@{{ .hostname }}") [$GOTTY_TITLE_FORMAT]
--reconnect Enable reconnection [$GOTTY_RECONNECT]
--reconnect-time value Time to reconnect (default: 10) [$GOTTY_RECONNECT_TIME]
--max-connection value Maximum connection to gotty (default: 0) [$GOTTY_MAX_CONNECTION]
--once Accept only one client and exit on disconnection [$GOTTY_ONCE]
--timeout value Timeout seconds for waiting a client(0 to disable) (default: 0) [$GOTTY_TIMEOUT]
--permit-arguments Permit clients to send command line arguments in URL (e.g. http://example.com:8080/?arg=AAA&arg=BBB) [$GOTTY_PERMIT_ARGUMENTS]
--width value Static width of the screen, 0(default) means dynamically resize (default: 0) [$GOTTY_WIDTH]
--height value Static height of the screen, 0(default) means dynamically resize (default: 0) [$GOTTY_HEIGHT]
--ws-origin value A regular expression that matches origin URLs to be accepted by WebSocket. No cross origin requests are acceptable by default [$GOTTY_WS_ORIGIN]
--term value Terminal name to use on the browser, one of xterm or hterm. (default: "xterm") [$GOTTY_TERM]
--close-signal value Signal sent to the command process when gotty close it (default: SIGHUP) (default: 1) [$GOTTY_CLOSE_SIGNAL]
--close-timeout value Time in seconds to force kill process after client is disconnected (default: -1) (default: -1) [$GOTTY_CLOSE_TIMEOUT]
--config value Config file path (default: "~/.gotty") [$GOTTY_CONFIG]
--version, -v print the version
You can customize default options and your terminal (hterm) by providing a config file to the gotty command. GoTTY loads a profile file at ~/.gotty by default when it exists.
// Listen at port 9000 by default
port = "9000"
// Enable TSL/SSL by default
enable_tls = true
// hterm preferences
// Smaller font and a little bit bluer background color
preferences {
font_size = 5
background_color = "rgb(16, 16, 32)"
}
See the .gotty file in this repository for the list of configuration options.
By default, GoTTY doesn't allow clients to send any keystrokes or commands except terminal window resizing. When you want to permit clients to write input to the TTY, add the -w option. However, accepting input from remote clients is dangerous for most commands. When you need interaction with the TTY for some reasons, consider starting GoTTY with tmux or GNU Screen and run your command on it (see "Sharing with Multiple Clients" section for detail).
To restrict client access, you can use the -c option to enable the basic authentication. With this option, clients need to input the specified username and password to connect to the GoTTY server. Note that the credentical will be transmitted between the server and clients in plain text. For more strict authentication, consider the SSL/TLS client certificate authentication described below.
The -r option is a little bit casualer way to restrict access. With this option, GoTTY generates a random URL so that only people who know the URL can get access to the server.
All traffic between the server and clients are NOT encrypted by default. When you send secret information through GoTTY, we strongly recommend you use the -t option which enables TLS/SSL on the session. By default, GoTTY loads the crt and key files placed at ~/.gotty.crt and ~/.gotty.key. You can overwrite these file paths with the --tls-crt and --tls-key options. When you need to generate a self-signed certification file, you can use the openssl command.
openssl req -x509 -nodes -days 9999 -newkey rsa:2048 -keyout ~/.gotty.key -out ~/.gotty.crt(NOTE: For Safari uses, see how to enable self-signed certificates for WebSockets when use self-signed certificates)
For additional security, you can use the SSL/TLS client certificate authentication by providing a CA certificate file to the --tls-ca-crt option (this option requires the -t or --tls to be set). This option requires all clients to send valid client certificates that are signed by the specified certification authority.
To build the frontend part (JS files and other static files), you need npm.
GoTTY uses xterm.js and hterm to run a JavaScript based terminal on web browsers. GoTTY itself provides a websocket server that simply relays output from the TTY to clients and receives input from clients and forwards it to the TTY. This hterm + websocket idea is inspired by Wetty.
- gotty-client: If you want to connect to GoTTY server from your terminal
- Secure Shell (Chrome App): If you are a chrome user and need a "real" SSH client on your web browser, perhaps the Secure Shell app is what you want
- Wetty: Node based web terminal (SSH/login)
- ttyd: C port of GoTTY with CJK and IME support
- tmate: Forked-Tmux based Terminal-Terminal sharing
- termshare: Terminal-Terminal sharing through a HTTP server
- tmux: Tmux itself also supports TTY sharing through SSH)
The MIT License