Refactor server

This commit is contained in:
osmarks 2018-10-06 09:38:21 +01:00
parent 14c7bb1b4a
commit 1f54b9d0f1
4 changed files with 654 additions and 186 deletions

3
.gitignore vendored
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@ -1,2 +1,3 @@
node_modules
db.json
db.json
db.level

614
package-lock.json generated
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"integrity": "sha512-BVwVbPJRspzNh2yfslyT1PSbl5uIk03EZlb493RKHN4qej/D06n1cEhjlOJG69oFsE7OT8XjpTUcYf6pKTLMhw==",
"dev": true,
"requires": {
"arrify": "^1.0.0",
"buffer-from": "^1.1.0",
"diff": "^3.1.0",
"make-error": "^1.1.1",
"minimist": "^1.2.0",
"mkdirp": "^0.5.1",
"source-map-support": "^0.5.6",
"yn": "^2.0.0"
}
},
"tunnel-agent": {
"version": "0.6.0",
"resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
"integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
"requires": {
"safe-buffer": "^5.0.1"
}
},
"type-is": {
"version": "1.6.16",
"resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.16.tgz",
@ -2949,8 +3405,7 @@
"util-deprecate": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
"integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
"dev": true
"integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
},
"utils-merge": {
"version": "1.0.1",
@ -2971,6 +3426,19 @@
"isexe": "^2.0.0"
}
},
"which-pm-runs": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/which-pm-runs/-/which-pm-runs-1.0.0.tgz",
"integrity": "sha1-Zws6+8VS4LVd9rd4DKdGFfI60cs="
},
"wide-align": {
"version": "1.1.3",
"resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
"integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
"requires": {
"string-width": "^1.0.2 || 2"
}
},
"widest-line": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/widest-line/-/widest-line-2.0.0.tgz",
@ -2980,6 +3448,11 @@
"string-width": "^2.1.1"
}
},
"wrappy": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
"integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
},
"write-file-atomic": {
"version": "2.3.0",
"resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.3.0.tgz",
@ -3005,11 +3478,22 @@
"integrity": "sha1-SWsswQnsqNus/i3HK2A8F8WHCtQ=",
"dev": true
},
"xtend": {
"version": "4.0.1",
"resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
"integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
},
"yallist": {
"version": "2.1.2",
"resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
"integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
"dev": true
},
"yn": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/yn/-/yn-2.0.0.tgz",
"integrity": "sha1-5a2ryKz0CPY4X8dklWhMiOavaJo=",
"dev": true
}
}
}

View File

@ -6,16 +6,17 @@
"license": "MIT",
"dependencies": {
"cors": "^2.8.4",
"cuid": "^2.1.4",
"express": "^4.16.3",
"express-ws": "^4.0.0",
"human-id": "^1.0.2",
"lowdb": "^1.0.0",
"level": "^4.0.0",
"ws": "^6.0.0"
},
"devDependencies": {
"nodemon": "^1.18.4"
"nodemon": "^1.18.4",
"ts-node": "^7.0.1"
},
"scripts": {
"dev": "nodemon -w src src/index.js"
"dev": "nodemon -w src src/index.js"
}
}

View File

@ -1,138 +1,120 @@
const express = require("express");
const low = require("lowdb");
const FileAsync = require('lowdb/adapters/FileAsync');
const websocket = require('ws');
const humanID = require("human-id");
const cors = require("cors");
const express = require("express")
const websocket = require("ws")
const cors = require("cors")
const level = require("level")
const expressWS = require("express-ws")
const cuid = require("cuid")
const makeID = () => humanID({
separator: "-",
capitalize: false
});
const db = level("./db.level", {
valueEncoding: "json"
})
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 app = express()
const eWSS = expressWS(app)
let messageLogs = [];
app.use(cors())
app.use(express.static(__dirname))
const commands = {
open(ws, message) {
const channel = message.channel;
validateChannel(channel);
const validateChannel = channel => { if (typeof channel !== "string" && typeof channel !== "number") throw new Error("Invalid type for channel!") }
const wildcardChannel = "*"
console.log("Opening", channel, "on", ws.ID);
// Avoid duplicate channels
if (!ws.channels.includes(channel)) ws.channels.push(channel);
const messageLog = []
return { channels: ws.channels };
const broadcast = (wss, msg, sender) => {
const toSend = {
...msg,
type: "message",
ID: cuid(),
time: new Date().getTime()
}
wss.clients.forEach(socket => {
let send = socket.readyState === websocket.OPEN
if (socket.type === "client") { send = send && (socket.channels.includes(msg.channel) || socket.channels.includes(wildcardChannel)) && socket !== sender }
else if (socket.type === "peer") { send = send && true }
if (send) {
socket.send(JSON.stringify(toSend))
}
})
messageLog.unshift(toSend) // push to front for nice ordering
}
const clientCommands = {
open(message, sendBack, ctx) {
const channel = message.channel
const ws = ctx.ws
validateChannel(channel)
if (!ws.channels.includes(channel)) ws.channels.push(channel)
sendBack({ channels: ws.channels })
},
close(ws, message) {
const channel = message.channel;
validateChannel(channel);
console.log("Closing", channel, "on", ws.ID);
close(message, sendBack, ctx) {
const channel = message.channel
const ws = ctx.ws
validateChannel(channel)
// Remove channel from list if exists
const index = ws.channels.indexOf(channel);
const index = ws.channels.indexOf(channel)
if (index > -1) {
ws.channels.splice(index, 1);
return { closed: channel }
ws.channels.splice(index, 1)
sendBack({ channels: ws.channels })
} else {
throw new Error("Channel " + channel + " not open.");
throw new Error("Channel " + channel + " not open.")
}
},
message(ws, message, db, wss) {
const toSend = {
...message,
ID: makeID(),
senderID: ws.ID,
time: new Date().getTime()
};
console.log("Sending", message.message, "on", message.channel, "from", 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.ID !== ws.ID) {
client.send(JSON.stringify(toSend));
sentTo.push(client.ID);
}
});
toSend.sentTo = sentTo;
messageLogs.unshift(toSend);
return { sentTo, ID: toSend.ID };
log(message, sendBack) {
const start = message.start || 0
const end = message.end || 100
sendBack({ log: messageLog.slice(start, end) })
},
ID(ws) {
return { ID: ws.ID };
},
log(ws, data) {
const start = data.start || 0;
const end = data.end || 100;
return { log: messageLogs.slice(start, end) };
message(message, sendBack, { wss, ws }) {
broadcast(wss, message, ws)
}
}
low(new FileAsync(process.env.DB || "./db.json")).then(db => {
db.defaults({ channels: [] }).write();
const ctx = {
wss: eWSS.getWss(),
db
}
const app = express();
const expressWSS = require("express-ws")(app);
const websocketCommandProcessor = (ws, commands) => {
const send = x => ws.send(JSON.stringify(x))
ws.on("message", raw => {
try {
const message = JSON.parse(raw)
if (typeof message === "object" && message !== null && message !== undefined) {
const commandName = message.type
const command = commands[commandName]
if (!command) { throw new Error("No such command " + commandName) }
app.use(cors());
app.use(express.static(__dirname));
const sendBack = x => send({type: "result", for: commandName, ...x})
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."
})
command(message, sendBack, { ws, ...ctx })
} else {
throw new Error("Message must be object")
}
} catch(e) {
console.error(e)
send({
type: "error",
error: e.toString()
})
return
}
})
}
// 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.ws("/connect", (ws, req) => {
ws.channels = []
ws.type = "client"
websocketCommandProcessor(ws, clientCommands)
})
app.listen(parseInt(process.env.PORT) || 4567);
});
app.ws("/peer", (ws, req) => {
})
app.listen(parseInt(process.env.PORT) || 4567)