diff --git a/LICENSE.txt b/LICENSE.txt
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--- /dev/null
+++ b/LICENSE.txt
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+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
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+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff --git a/OpenTerminal.service b/OpenTerminal.service
deleted file mode 100644
index be99b8c..0000000
--- a/OpenTerminal.service
+++ /dev/null
@@ -1,15 +0,0 @@
-[Unit]
-Description=OpenTerminal Server
-After=network.target
-
-[Service]
-Environment="PORT=443"
-Environment="SSL_CERT=/certs/arimelody.me/arimelody.me.crt"
-Environment="SSL_KEY=/certs/arimelody.me/arimelody.me.key"
-Type=simple
-ExecStart=/usr/bin/node /srv/openterminal/server/main.js
-WorkingDirectory=/srv/openterminal
-Restart=on-failure
-
-[Install]
-WantedBy=multi-user.target
diff --git a/README.md b/README.md
index 71ca2e1..63fe834 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
# OpenTerminal
+
An online terminal and communal text buffer
![openterminal thumbnail image](public/img/thumbnail.png)
@@ -15,13 +16,25 @@ jokes aside- while i do absolutely see how an open, self-moderated text buffer i
...or maybe it'll just become a garbage-posting haven. regardless, it's a fun little idea, so i made it anyway.
+## hosting
+
+- `git clone` this repo and `cd` into it
+- `npm ci` to install dependencies
+- `npm run start`, and you should be good to do!
+
+alternatively, you can `git clone` this repo and `docker build` a container if you like. we do not yet have official openterminal images on a public repo, sorry!
+
+OpenTerminal also makes use of environment variables for server hosts who want a bit more control of their setup:
+
+- `OPENTERM_HOST` - the address to bind OpenTerminal's http and websocket server. (default 0.0.0.0)
+- `OPENTERM_POST` - the port to bind OpenTerminal's http and websocket server. (default 8080)
+- `OPENTERM_TRUSTED_PROXIES` - a comma-separated list of addresses to check for `X-Forwarded-For` headers from. handy if you run OpenTerminal behind a reverse proxy! (default none, example `"127.0.0.1,192.168.0.100"`)
+
## roadmap
- rewrite backend in go/rust (me no like javascript raaaahhh)
-- multiple "channels" (at least if one gets flooded, there's somewhere else you can go)
- master server (anyone can host a channel and post to the MS)
### "maybe" roadmap
- channel logs (for recovery in the event of a crash, as an optional feature)
-
diff --git a/docker-compose-example.yml b/docker-compose-example.yml
index de3f038..6eff74c 100644
--- a/docker-compose-example.yml
+++ b/docker-compose-example.yml
@@ -5,10 +5,9 @@ services:
image: openterminal
container_name: openterminal
ports:
- - 443:443
- volumes:
- - ./certs/cert.crt:/srv/openterminal/certs/cert.crt
- - ./certs/cert.key:/srv/openterminal/certs/cert.key
+ - 8080:8080
environment:
- PORT: 443
+ OPENTERM_HOST: 0.0.0.0
+ OPENTERM_PORT: 8080
+ # OPENTERM_TRUSTED_PROXIES: 127.0.0.1,192.168.0.100
restart: unless-stopped
diff --git a/public/index.html b/public/index.html
index 4f5dbd0..cf4ecaf 100644
--- a/public/index.html
+++ b/public/index.html
@@ -49,6 +49,7 @@
diff --git a/public/scripts/main.js b/public/scripts/main.js
index 3303067..703a14d 100644
--- a/public/scripts/main.js
+++ b/public/scripts/main.js
@@ -2,6 +2,8 @@ import * as Terminal from "./terminal.js";
import * as Visual from "./visual.js";
document.addEventListener("DOMContentLoaded", () => {
+ document.getElementById("version").textContent = Terminal.VERSION;
+
Visual.bind();
Terminal.start();
@@ -56,3 +58,37 @@ document.addEventListener("DOMContentLoaded", () => {
});
});
+/**
+ * requests that the user confirm they wish to connect to an insecure (ws://) server.
+ * @returns a promise returning `true` or `false` based on user input.
+ */
+export async function user_confirm_insecure() {
+ const warn_dialog = document.getElementById("warn-dialog");
+ const warn_close = warn_dialog.getElementsByClassName("dialog-close").item(0);
+ const dialog_backdrop = document.getElementById("dialog-backdrop");
+ const warn_proceed = document.getElementById("warn-proceed");
+ const warn_cancel = document.getElementById("warn-cancel");
+
+ warn_dialog.classList.add("show");
+ dialog_backdrop.classList.add("show");
+
+ const user_input = await new Promise((Resolve, Reject) => {
+ warn_close.addEventListener('click', () => {
+ Resolve(false);
+ });
+ warn_cancel.addEventListener('click', () => {
+ warn_close.click();
+ });
+ dialog_backdrop.addEventListener("click", () => {
+ warn_close.click();
+ });
+ warn_proceed.addEventListener('click', () => {
+ Resolve(true);
+ });
+ });
+
+ warn_dialog.classList.remove("show");
+ dialog_backdrop.classList.remove("show");
+
+ return user_input;
+}
diff --git a/public/scripts/terminal.js b/public/scripts/terminal.js
index bf55389..31b6c17 100644
--- a/public/scripts/terminal.js
+++ b/public/scripts/terminal.js
@@ -1,12 +1,18 @@
-var recv_buffer = [];
-var send_buffer = [];
+import { user_confirm_insecure } from "./main.js";
-var content;
-var server_indicator;
-var mobile_input;
+export const VERSION = "1.1.0";
+
+const foreground = localStorage.getItem("foreground");
+const background = localStorage.getItem("background");
+const content = document.getElementById("content");
+const server_indicator = document.getElementById("server-url");
+const mobile_input = document.getElementById("mobile-input");
var client;
+var recv_buffer = [];
+var send_buffer = [];
+
var my_colour = false;
var pre_buffer_chars = 0;
var server_url = "";
@@ -20,6 +26,7 @@ const DATA_TYPES = {
backspace: 4,
backword: 5,
arrow: 6,
+ version: 7,
};
/**
@@ -49,8 +56,6 @@ to help you feel a little more comfortable, i've prepared some commands for you:
server_url = new URL(window.location).searchParams.get("server") || window.location.host;
- const foreground = localStorage.getItem("foreground");
- const background = localStorage.getItem("background");
if (foreground && background) {
window.set_colours(foreground, background);
}
@@ -59,10 +64,6 @@ to help you feel a little more comfortable, i've prepared some commands for you:
document.body.classList.add("lcd");
}
- content = document.getElementById("content");
- server_indicator = document.getElementById("server-url");
- mobile_input = document.getElementById("mobile-input");
-
document.addEventListener("keydown", handle_input);
document.addEventListener("paste", handle_paste);
@@ -87,9 +88,7 @@ to help you feel a little more comfortable, i've prepared some commands for you:
}
/**
- * closes any existing websocket connection and attempts to create a new one.
- * `wss://` is prefixed automatically if not present.
- * insecure websockets are not recommended and support is not planned.
+ * closes any existing websocket connection and attempts to create a new one.
* @param {string} server_url - the server websocket url to connect to.
*/
export async function connect(server_url) {
@@ -111,106 +110,91 @@ export async function connect(server_url) {
add_system_message("Connecting to the server...\n");
- let protocol = false;
-
- // check if user explicitly stated secure/insecure protocol
- if (server_url.startsWith("wss://")) {
- protocol = "wss://";
- server_url = server_url.split(6);
- } else if (server_url.startsWith("ws://")) {
- server_url = server_url.split(5);
- protocol = "ws://";
- }
- // otherwise, probe the url!
- else protocol = await get_available_socket_protocol(server_url);
-
- // no server was found!
- if (!protocol) {
- return add_system_message(`\n[NO SERVER FOUND AT ${server_url}!]\n`);
- }
-
- // server was found, but it's insecure!
- if (protocol === "ws://") {
- const warn_dialog = document.getElementById("warn-dialog");
- const warn_close = warn_dialog.getElementsByClassName("dialog-close").item(0);
- const user_wants_insecure = await new Promise((Resolve, Reject) => {
- const dialog_backdrop = document.getElementById("dialog-backdrop");
- const warn_proceed = document.getElementById("warn-proceed");
- const warn_cancel = document.getElementById("warn-cancel");
-
- warn_dialog.classList.add("show");
- dialog_backdrop.classList.add("show");
-
- set_enable_input(false);
-
- warn_close.addEventListener('click', () => {
- Resolve(false);
- });
- warn_cancel.addEventListener('click', () => {
- Resolve(false);
- });
- warn_proceed.addEventListener('click', () => {
- Resolve(true);
- });
+ if (server_url.startsWith("wss://") || server_url.startsWith("ws://")) {
+ client = new WebSocket(server_url);
+ add_client_events(client);
+ client.addEventListener('error', () => {
+ add_system_message(`\nConnection failed!\n`);
+ add_system_message("Ensure you entered the correct server URL, or check the console for more details.\n");
});
-
- warn_close.click();
-
- set_enable_input(true);
-
- if (!user_wants_insecure) {
- server_indicator.innerText = "not connected";
- add_system_message(`\n[CONNECTION CLOSED]\n`);
- return;
+ } else {
+ try {
+ client = await find_socket_at_url(server_url);
+ } catch (error) {
+ if (error === 'deny-insecure') {
+ server_indicator.innerText = "not connected";
+ add_system_message(`\n[CONNECTION CLOSED]\n`);
+ return
+ }
+ add_system_message(`\nConnection failed!\n`);
+ add_system_message("Ensure you entered the correct server URL, or check the console for more details.\n");
}
}
- client = new WebSocket(protocol + server_url);
+ set_enable_input(true);
+}
+
+/**
+ * attaches initial client events (open, message, close)
+ * @param {WebSocket} client the client to bind events to.
+ */
+function add_client_events(client) {
+ client.addEventListener('open', async () => {
+ console.log(`Successfully connected to ${client.url}.`);
- client.addEventListener('open', () => {
server_indicator.innerText = server_url;
add_system_message(`Connection successful.\n\n`);
add_system_message(`=== BEGIN SESSION ===\n\n`);
+
+ client.send(JSON.stringify({
+ type: DATA_TYPES.version,
+ text: VERSION
+ }));
+
+ client.addEventListener('message', handle_message);
+
+ client.addEventListener('close', () => {
+ server_indicator.innerText = "not connected";
+ add_system_message(`\n[CONNECTION CLOSED]\n`);
+ });
+
new_caret();
});
-
- client.addEventListener('message', handle_message);
-
- client.addEventListener('close', () => {
- server_indicator.innerText = "not connected";
- add_system_message(`\n[CONNECTION CLOSED]\n`);
- });
-
- client.addEventListener('error', () => {
- add_system_message(`\nConnection failed!\n`);
- add_system_message("Ensure you entered the correct server URL, or check the console for more details.\n");
- });
}
/**
* probes the `server_url` for a secure websocket connection first, an insecure websocket second, or resolves to `false` on failure.
* @param {string} server_url
- * @returns a promise either resolving to the discovered protocol, or false on failure.
+ * @returns a promise either resolving to the created socket, or rejects to a string on failure.
*/
-function get_available_socket_protocol(server_url) {
+function find_socket_at_url(server_url) {
return new Promise((Resolve, Reject) => {
const secure_client = new WebSocket("wss://" + server_url);
+ add_client_events(secure_client);
secure_client.addEventListener('open', () => {
- Resolve("wss://");
+ Resolve(secure_client);
});
- secure_client.addEventListener('error', () => {
+ secure_client.addEventListener('error', async () => {
+ set_enable_input(false);
+ if (!await user_confirm_insecure()) {
+ Reject('deny-insecure');
+ set_enable_input(true);
+ return;
+ }
+ set_enable_input(true);
+
const insecure_client = new WebSocket("ws://" + server_url);
+ add_client_events(insecure_client);
insecure_client.addEventListener('open', () => {
- Resolve("ws://");
+ Resolve(insecure_client);
});
insecure_client.addEventListener('error', () => {
- Reject(false);
+ Reject('error');
});
-
});
});
}
@@ -229,7 +213,7 @@ function add_system_message(text) {
}
/**
- * the message handler for the websocket.
+ * handles incoming messages on the websocket.
*/
function handle_message(event) {
var data;
diff --git a/server/main.js b/server/main.js
index 9993d64..ba992ce 100644
--- a/server/main.js
+++ b/server/main.js
@@ -3,6 +3,8 @@ const http = require('http');
const path = require('path');
const Websocket = require('ws');
+const VERSION = "1.1.0";
+
const MIME_TYPES = {
default: "application/octet-stream",
html: "text/html; charset=UTF-8",
@@ -23,6 +25,7 @@ const DATA_TYPES = {
backspace: 4,
backword: 5,
arrow: 6,
+ version: 7,
};
const MOTDS = [
@@ -43,7 +46,7 @@ const MOTDS = [
];
const STATIC_PATH = path.join(process.cwd(), "public");
-const CACHE_MAX_AGE = 86400 // 1 day
+const CACHE_MAX_AGE = 14400 // 4 hours
const BANNER =
`Welcome to OpenTerminal!
@@ -58,9 +61,15 @@ Please acquire a genuine copy.
This connection will now terminate.
=========================================
`;
+const VERSION_ERROR =
+`Your client does not match this server's version of OpenTerminal (${VERSION})!
+If you are connecting to this site's own OpenTerminal server, please refresh the page or clear your browser's cache to update.
+`
-
-const PORT = process.env.PORT || 8080;
+console.log("using env vars: " + Object.keys(process.env).filter(value => { return value.startsWith("OPENTERM_") }).join(', '));
+const HOST = process.env.OPENTERM_HOST || '0.0.0.0';
+const PORT = process.env.OPENTERM_PORT || 8080;
+const TRUSTED_PROXIES = process.env.OPENTERM_TRUSTED_PROXIES ? process.env.OPENTERM_TRUSTED_PROXIES.split(',') : [];
const PING_INTERVAL = 10000;
let sockets = [];
@@ -81,20 +90,28 @@ async function get_file(url) {
// check for path traversal. path traversal is...bad.
const path_traversal = !file_path.startsWith(STATIC_PATH);
- const exists = await fs.promises.access(file_path).then(...[() => true, () => false]);
+ const exists = fs.existsSync(file_path) && fs.statSync(file_path).isFile();
if (path_traversal || !exists) return false;
const ext = path.extname(file_path).substring(1).toLowerCase();
- const stream = fs.createReadStream(file_path);
- return { stream, ext };
+
+ try {
+ const data = await fs.promises.readFile(file_path, { encoding: 'utf8' });
+ return { data, ext };
+ } catch (error) {
+ console.error(error);
+ return false;
+ }
+
}
const server = http.createServer(async (req, res) => {
+ const request_time = new Date().getTime();
const file = await get_file(req.url);
- if (!file) {
+ if (file === false) {
res.writeHead(404);
- res.end();
- return;
+ res.end("404 not found!");
+ return log_request(req, res, request_time);
}
const mime_type = MIME_TYPES[file.ext] || MIME_TYPES.default;
res.writeHead(200, {
@@ -102,12 +119,26 @@ const server = http.createServer(async (req, res) => {
"Cache-Control": `max-age=${CACHE_MAX_AGE}`,
"Server": "OpenTerminal",
});
- file.stream.pipe(res);
- // console.log(`${req.method} - ${req.url}`);
+ res.write(file.data);
+ res.end();
+ return log_request(req, res, request_time);
});
+function log_request(req, res, time) {
+ const elapsed = new Date().getTime() - time;
+ console.log(`${new Date().toISOString()} - ${req.method} ${req.url} - ${res.statusCode} - ${get_real_address(req)} in ${elapsed}ms`);
+}
+
+function get_real_address(req) {
+ if (TRUSTED_PROXIES.indexOf(req.socket.localAddress) !== -1 && req.headers['x-forwarded-for']) {
+ return req.headers['x-forwarded-for'];
+ }
+ return req.socket.localAddress;
+}
+
const wss = new Websocket.Server({ server });
-wss.on('connection', socket => {
+wss.on('connection', (socket, req) => {
+ console.log(`${new Date().toISOString()} - WS OPEN - ${get_real_address(req)} (active connections: ${sockets.length + 1})`);
/*
socket.colour = generate_colour();
socket.send(JSON.stringify({
@@ -128,18 +159,16 @@ wss.on('connection', socket => {
}));
}
- const ping_interval = setInterval(
+ const ping_routine = setInterval(
function() {
socket.send(JSON.stringify({
type: DATA_TYPES.ping,
}))
}, PING_INTERVAL);
- socket.ping_interval = ping_interval;
+ socket.ping_routine = ping_routine;
sockets.push(socket);
- // console.log(`new connection.\n\tcurrent connections: ${sockets.length}`);
-
socket.on('message', event => {
try {
handle_message(JSON.parse(event), socket)
@@ -153,7 +182,7 @@ wss.on('connection', socket => {
});
socket.on('close', () => {
- clearInterval(socket.ping_interval);
+ clearInterval(socket.ping_routine);
sockets = sockets.filter(s => s !== socket);
// console.log(`connection closed.\n\tcurrent connections: ${sockets.length}`);
});
@@ -163,6 +192,27 @@ wss.on('connection', socket => {
* handles parsed JSON data sent by the client.
*/
function handle_message(data, user) {
+ if (user.version === undefined) {
+ if (data.type !== DATA_TYPES.version) {
+ user.send(JSON.stringify({
+ type: DATA_TYPES.text,
+ text: VERSION_ERROR
+ }));
+ user.close();
+ return;
+ } else if (data.text !== VERSION) {
+ user.send(JSON.stringify({
+ type: DATA_TYPES.text,
+ text: VERSION_ERROR
+ }));
+ user.close();
+ return;
+ } else {
+ user.version = data.text;
+ return;
+ }
+ }
+
switch (data.type) {
case DATA_TYPES.backword:
var break_point = buffer.lastIndexOf(" ");
@@ -220,8 +270,9 @@ function generate_colour() {
return result;
}
-server.listen(PORT, () => {
- console.log(`OpenTerminal is now LIVE on http://127.0.0.1:${PORT}`);
+server.listen(PORT, HOST, () => {
+ console.log(`OpenTerminal is now LIVE on http://${HOST === '0.0.0.0' ? '127.0.0.1' : HOST}:${PORT}`);
+ if (TRUSTED_PROXIES.length > 0) console.log(`Using X-Forwarded-For headers for hosts: ${TRUSTED_PROXIES.join(", ")}`);
});
/**