From 1f54b9d0f1d46c11ae1ab53c2670a542e7e9fb5d Mon Sep 17 00:00:00 2001 From: osmarks Date: Sat, 6 Oct 2018 09:38:21 +0100 Subject: [PATCH] Refactor server --- .gitignore | 3 +- package-lock.json | 614 +++++++++++++++++++++++++++++++++++++++++----- package.json | 9 +- src/index.js | 214 ++++++++-------- 4 files changed, 654 insertions(+), 186 deletions(-) diff --git a/.gitignore b/.gitignore index 7322227..17d0905 100644 --- a/.gitignore +++ b/.gitignore @@ -1,2 +1,3 @@ node_modules -db.json \ No newline at end of file +db.json +db.level \ No newline at end of file diff --git a/package-lock.json b/package-lock.json index b80175c..f624ab9 100644 --- a/package-lock.json +++ b/package-lock.json @@ -10,6 +10,14 @@ "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==", "dev": true }, + "abstract-leveldown": { + "version": "5.0.0", + "resolved": "https://registry.npmjs.org/abstract-leveldown/-/abstract-leveldown-5.0.0.tgz", + "integrity": "sha512-5mU5P1gXtsMIXg65/rsYGsi93+MlogXZ9FA8JnwKurHQg64bfXwGYVdVdijNTVNOlAsuIiOwHdvFFD5JqCJQ7A==", + "requires": { + "xtend": "~4.0.0" + } + }, "accepts": { "version": "1.3.5", "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz", @@ -31,8 +39,7 @@ "ansi-regex": { "version": "3.0.0", "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz", - "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=", - "dev": true + "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=" }, "ansi-styles": { "version": "3.2.1", @@ -53,6 +60,20 @@ "normalize-path": "^2.1.1" } }, + "aproba": { + "version": "1.2.0", + "resolved": "https://registry.npmjs.org/aproba/-/aproba-1.2.0.tgz", + "integrity": "sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw==" + }, + "are-we-there-yet": { + "version": "1.1.5", + "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz", + "integrity": "sha512-5hYdAkZlcG8tOLujVDTgCT+uPX0VnpAH28gWsLfzpXYm7wP6mp5Q/gYyR7YQ0cKVJcXJnl3j2kpBan13PtQf6w==", + "requires": { + "delegates": "^1.0.0", + "readable-stream": "^2.0.6" + } + }, "arr-diff": { "version": "4.0.0", "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz", @@ -82,6 +103,12 @@ "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=", "dev": true }, + "arrify": { + "version": "1.0.1", + "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz", + "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=", + "dev": true + }, "assign-symbols": { "version": "1.0.0", "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz", @@ -172,6 +199,20 @@ "integrity": "sha512-DYWGk01lDcxeS/K9IHPGWfT8PsJmbXRtRd2Sx72Tnb8pcYZQFF1oSDb8hJtS1vhp212q1Rzi5dUf9+nq0o9UIg==", "dev": true }, + "bindings": { + "version": "1.3.0", + "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.3.0.tgz", + "integrity": 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"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 } } } diff --git a/package.json b/package.json index f060f42..463ff33 100644 --- a/package.json +++ b/package.json @@ -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" } } diff --git a/src/index.js b/src/index.js index 42cd595..bdfc4e6 100644 --- a/src/index.js +++ b/src/index.js @@ -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); -}); \ No newline at end of file +app.ws("/peer", (ws, req) => { + +}) + +app.listen(parseInt(process.env.PORT) || 4567) \ No newline at end of file