kopia lustrzana https://github.com/piku/piku
Nodejs example app (#52)
* Fix node deploy path handling.
This patch uses a temporary symlink to envs/APP/node_modules to force
node to install the modules into the right place even on older node
versions, like v4.2.6 which ships with Unbuntu 16.04.
Apps launching node servers will need to manually set
NODE_PATH="${VIRTUAL_ENV}/node_modules" to have it run correctly, and
in future we should consider setting this in spawn_app (though currently
spawn_app does not know what kind of app it's spawning).
* Add NODE_PATH to spawn env if node env present.
* Added nodejs websocket chat example app.
pull/54/head
Chris McCormick
Rui Carmo
rodzic
e43b318d61
commit
a4ded8c994
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AUTO_RESTART=1
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web: ./index.js 2>&1 | cat
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release: ./hello.js
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# Nodejs Sample Application
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This is a simple Nodejs app for piku that demonstrates:
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* Simple multi-user websocket chat application.
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* A nodejs web worker which handles incoming requests.
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* A release worker which fires at deploy time (hello.js).
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To publish this app to `piku`, make a copy of this folder and run the following commands:
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```bash
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git init .
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git remote add piku piku@your_server:nodechat
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git add .
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git commit -a -m "initial commit"
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git push piku master
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```
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Then you can set up an SSL cert and connect a domain by setting config variables like this:
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```bash
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ssh piku@your_server config:set nodechat NGINX_SERVER_NAME=your_server NGINX_HTTPS_ONLY=1
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```
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Then visit the site `your_server` and you will see a simple websocket chat application.
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#!/usr/bin/env nodejs
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console.log("Hello!");
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console.log(process.argv)
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console.log(require('express') ? "express exists" : "express missing");
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<title>HTML5 Minimal template</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="stylesheet" type="text/css" href="minimal.css" >
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<link rel="stylesheet" type="text/css" href="minimal-inputs.css" >
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</head>
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<body>
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<p id="connecting">Connecting...</p>
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<div id="interface">
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<input type="text" id="nickname" class="quarter" placeholder="Nick name..."/>
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<input type="text" id="message" class="half" placeholder="Message text..."/>
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<button id="send" class="quarter">Send</button>
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<pre id="output"></pre>
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</div>
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</body>
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<script>
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var el = function(id) { return document.getElementById(id) };
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var ws = new WebSocket(document.location.href.replace("http", "ws") + "ws/");
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ws.onopen = function() {
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console.log("websocket opened", arguments);
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el("connecting").style.display = "none";
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el("interface").style.display = "block";
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};
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ws.onmessage = function(message) { el("output").textContent += message.data + "\n"; };
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ws.onclose = function() { console.log("close"); };
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var send = function(ev) {
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ws.send(JSON.stringify({
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"name": el("nickname").value,
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"message": el("message").value,
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}));
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el("message").value = "";
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el("message").focus();
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}
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el("send").onclick = send;
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el("message").onkeyup = function(ev) {
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if (ev.keyCode == 13) {
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send(ev);
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}
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}
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</script>
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<style>
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* {
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box-sizing: border-box;
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}
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body {
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color: #555;
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margin: 0 auto;
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max-width: 50em;
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font-family: "Helvetica", "Arial", sans-serif;
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line-height: 1.5;
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padding: 2em 1em;
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}
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pre {
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border-left: 2px solid #bbb;
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padding: 1em;
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}
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a {
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color: #f56a6a;
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}
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input[type="submit"], input[type="reset"], input[type="button"], button, .button {
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box-shadow: inset 0 0 0 2px #f56a6a;
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color: #f56a6a;
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font-weight: 700;
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letter-spacing: 0.075em;
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text-transform: uppercase;
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text-align: center;
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font-size: 0.8em;
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}
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input[type="submit"], input[type="reset"], input[type="button"], button, .button, input[type="text"], input[type="password"], input[type="email"], input[type="tel"], select, textarea {
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border-radius: 0.375em;
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background-color: transparent;
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border: 0;
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cursor: pointer;
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display: inline-block;
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min-height: 3.5em;
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line-height: 3.5em;
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padding: 0 2.25em;
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text-decoration: none;
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margin: 0.25em 0.25em;
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font-size: 0.8em;
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}
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input[type="text"], input[type="password"], input[type="email"], input[type="tel"], select, textarea {
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background-color: #eee;
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color: #555;
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outline: none;
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padding: 0 0.75em;
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font-weight: bold;
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}
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.half {
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width: calc(50% - 0.7em);
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}
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.quarter {
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width: calc(25% - 0.75em);
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}
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#interface {
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display: none;
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}
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</style>
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</html>
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#!/usr/bin/env nodejs
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const express = require('express');
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const expressws = require('express-ws');
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const fs = require('fs');
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const app = express();
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const ews = expressws(app);
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app.get('/', (req, res) => {
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res.sendFile(__dirname + "/index.html");
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});
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app.ws('/ws', (ws, req) => {
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ws.on('message', msg => {
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console.log("Got message:", msg);
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ews.getWss().clients.map(function(c) {
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c.send(msg);
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});
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});
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ws.on('close', () => {
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console.log('WebSocket was closed');
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});
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})
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var port = process.env["PORT"] || 8000;
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var addr = process.env["BIND_ADDRESS"] || "127.0.0.1";
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console.log("Starting app on " + addr + ":" + port);
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app.listen(port, addr, () => console.log('App launched.'));
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@ -0,0 +1,8 @@
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{
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"dependencies": {
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"express": "^4.17.1",
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"express-ws": "^2.0.0"
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},
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"description": "Piku node example.",
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"name": "piku-example"
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}
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