Initial commit
This commit is contained in:
osmarks
commit
525b1245f7
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@ -0,0 +1,2 @@
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node_modules
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db.json
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@ -0,0 +1,96 @@
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-- download JSON library
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local a=http.get"https://pastebin.com/raw/4nRg9CHU"local b=fs.open("json","w")b.write(a.readAll())a.close()b.close()
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os.loadAPI "json" -- whyyyyyy
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local skynet = {
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server = "wss://osmarks.tk/skynet/connect/",
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socket = nil,
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open_channels = {}
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}
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function skynet.connect(force)
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if not skynet.socket or force then
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-- If we already have a socket and are throwing it away, close old one.
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if skynet.socket then skynet.socket.close() end
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-- Reset open channels, make a new websocket
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skynet.open_channels = {}
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sock = http.websocket(skynet.server)
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if not sock then error "Skynet server unavailable, broken or running newer protocol version." end
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skynet.socket = sock
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end
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end
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local function value_in_table(t, v)
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for k, tv in pairs(t) do if tv == v then return true, k end end
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return false
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end
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local function send_raw(data, tries)
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local tries = tries or 0
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-- We should not keep trying to reconnect forever.
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if tries >= 10 then error(string.format("Could not reconnect to skynet after %d tries", tries)) end
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-- Add small delay
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if tries > 1 then sleep(tries / 3) end
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-- Ensure we have a connection, force if we errored before
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skynet.connect(tries > 0)
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local ok, err = pcall(skynet.socket.send, json.encode(data))
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if not ok then send_raw(data, tries + 1) end
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end
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-- Opens the given channel
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function skynet.open(channel)
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-- Don't send unnecessary channel-open messages
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if not value_in_table(skynet.open_channels, channel) then
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send_raw {
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type = "open",
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channel = channel
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}
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table.insert(skynet.open_channels, channel)
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end
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end
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local listener_already_running = false
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-- Converts "websocket_message"s into "skynet_message"s.
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function skynet.listen(force)
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-- If we already have a listener going, make this function just idle forever
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-- Otherwise, we'd probably run into weirdness like multiple skynet_message events for each actual websocket message.
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if listener_already_running and not force then while true do os.pullEvent() end end
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listener_already_running = true
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skynet.connect()
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while true do
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local _, URL, contents = os.pullEvent "websocket_message"
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if URL == skynet.server then
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local result = json.decode(contents)
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if result and result.type and result.type == "message" then
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os.queueEvent("skynet_message", result.channel, result.message, result.ID, result)
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end
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end
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end
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end
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-- Receives one message on given channel
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-- Will open channel if it is not already open
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function skynet.receive(channel)
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if channel then skynet.open(channel) end
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local ch, result
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parallel.waitForAny(skynet.listen, function()
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repeat
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_, ch, result = os.pullEvent "skynet_message"
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-- channel being nil means no channel filter.
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until channel == nil or ch == channel
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end)
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return ch, result
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end
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-- Send given data on given channel
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function skynet.send(channel, data)
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send_raw {
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type = "message",
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message = data,
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channel = channel
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}
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end
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return skynet
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@ -0,0 +1,449 @@
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{
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"name": "skynet",
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"version": "1.0.0",
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"lockfileVersion": 1,
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"requires": true,
|
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"integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
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"requires": {
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"mime-types": "2.1.20",
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"negotiator": "0.6.1"
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}
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},
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"array-flatten": {
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"fresh": "0.5.2",
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"send": "0.16.2"
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},
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"unpipe": {
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"version": "1.0.0",
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},
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"vary": {
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"integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
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},
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"ws": {
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"version": "6.0.0",
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"resolved": "https://registry.npmjs.org/ws/-/ws-6.0.0.tgz",
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"integrity": "sha512-c2UlYcAZp1VS8AORtpq6y4RJIkJ9dQz18W32SpR/qXGfLDZ2jU4y4wKvvZwqbi7U6gxFQTeE+urMbXU/tsDy4w==",
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"requires": {
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"async-limiter": "1.0.0"
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}
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}
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}
|
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}
|
||||
|
|
@ -0,0 +1,14 @@
|
|||
{
|
||||
"name": "skynet",
|
||||
"version": "1.0.0",
|
||||
"description": "CC websocket networking server",
|
||||
"main": "src/index.js",
|
||||
"license": "MIT",
|
||||
"dependencies": {
|
||||
"express": "^4.16.3",
|
||||
"express-ws": "^4.0.0",
|
||||
"human-id": "^1.0.2",
|
||||
"lowdb": "^1.0.0",
|
||||
"ws": "^6.0.0"
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,122 @@
|
|||
const express = require("express");
|
||||
const low = require("lowdb");
|
||||
const FileAsync = require('lowdb/adapters/FileAsync');
|
||||
const websocket = require('ws');
|
||||
const humanID = require("human-id");
|
||||
|
||||
const makeID = () => humanID({
|
||||
separator: "-",
|
||||
capitalize: false
|
||||
});
|
||||
|
||||
const send = (sock, msg) => sock.send(JSON.stringify(msg));
|
||||
|
||||
const validateChannel = channel => { if (typeof channel !== "string" && typeof channel !== "number") throw new Error("Invalid type for channel!"); }
|
||||
|
||||
const wildcardChannel = "*";
|
||||
|
||||
const commands = {
|
||||
open(ws, message) {
|
||||
const channel = message.channel;
|
||||
validateChannel(channel);
|
||||
|
||||
console.log("Opening", channel, "on", ws.ID);
|
||||
// Avoid duplicate channels
|
||||
if (!ws.channels.includes(channel)) ws.channels.push(channel);
|
||||
|
||||
return { channels: ws.channels };
|
||||
},
|
||||
close(ws, message) {
|
||||
const channel = message.channel;
|
||||
validateChannel(channel);
|
||||
|
||||
console.log("Closing", channel, "on", ws.ID);
|
||||
|
||||
// Remove channel from list if exists
|
||||
const index = ws.channels.indexOf(channel);
|
||||
if (index > -1) {
|
||||
ws.channels.splice(index, 1);
|
||||
return {closed: channel}
|
||||
} else {
|
||||
throw new Error("Channel " + channel + " not open.");
|
||||
}
|
||||
},
|
||||
message(ws, message, db, wss) {
|
||||
const toSend = {
|
||||
...message,
|
||||
ID: makeID(),
|
||||
senderID: ws.ID
|
||||
};
|
||||
|
||||
// Send message to all clients listening on this channel or the wildcard channel.
|
||||
const sentTo = [];
|
||||
wss.clients.forEach(client => {
|
||||
if ((client.channels.includes(message.channel) || client.channels.includes(wildcardChannel)) && client.readyState === websocket.OPEN) {
|
||||
client.send(JSON.stringify(toSend));
|
||||
sentTo.push(client.ID);
|
||||
}
|
||||
});
|
||||
|
||||
return {sentTo};
|
||||
},
|
||||
getID(ws) {
|
||||
return {ID: ws.ID};
|
||||
}
|
||||
}
|
||||
|
||||
low(new FileAsync(process.env.DB || "./db.json")).then(db => {
|
||||
db.defaults({ channels: [] }).write();
|
||||
|
||||
const app = express();
|
||||
const expressWSS = require("express-ws")(app);
|
||||
|
||||
app.ws("/connect/", function(ws, req) {
|
||||
ws.channels = [];
|
||||
ws.ID = makeID();
|
||||
ws.on("message", msg => {
|
||||
let data;
|
||||
try {
|
||||
data = JSON.parse(msg);
|
||||
} catch(e) {
|
||||
console.log("Invalid data:", msg);
|
||||
send(ws, {
|
||||
type: "error",
|
||||
error: "JSON expected."
|
||||
})
|
||||
}
|
||||
|
||||
// If sent data has required keys, execute corresponding command
|
||||
if (typeof data === "object" && data !== null && data.type) {
|
||||
const cmd = data.type;
|
||||
try {
|
||||
const result = commands[cmd](ws, data, db, expressWSS.getWss());
|
||||
if (result !== null && result !== undefined) {
|
||||
if ("then" in result) { // Allow returning promises
|
||||
result.then(res => send(ws, {
|
||||
type: "result",
|
||||
for: cmd,
|
||||
...res
|
||||
}));
|
||||
} else {
|
||||
send(ws, {
|
||||
type: "result",
|
||||
for: cmd,
|
||||
...result
|
||||
});
|
||||
}
|
||||
}
|
||||
} catch(e) {
|
||||
// Send & log error
|
||||
console.log(e);
|
||||
send(ws, {
|
||||
type: "error",
|
||||
for: cmd,
|
||||
error: e.message
|
||||
})
|
||||
}
|
||||
}
|
||||
});
|
||||
});
|
||||
|
||||
app.listen(parseInt(process.env.PORT) || 4567);
|
||||
});
|
||||
Loading…
Reference in New Issue