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michaelliaomichaelliao
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add project view-loa
1 parent 411daa2 commit 079bd55

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‎samples/node/web/koa/view-koa/.vscode/launch.json

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{
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"version": "0.2.0",
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"configurations": [
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{
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"name": "Start",
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"type": "node",
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"request": "launch",
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"program": "${workspaceRoot}/start.js",
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"stopOnEntry": false,
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"args": [],
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"cwd": "${workspaceRoot}",
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"preLaunchTask": null,
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"runtimeExecutable": null,
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"runtimeArgs": [
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"--nolazy"
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],
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"env": {
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"NODE_ENV": "development"
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},
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"externalConsole": false,
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"sourceMaps": false,
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"outDir": null
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}
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]
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}

‎samples/node/web/koa/view-koa/app.js

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const Koa = require('koa');
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const bodyParser = require('koa-bodyparser');
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const router = require('koa-router')();
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const templating = require('./templating.js');
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const fs = require('fs');
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const app = new Koa();
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const isProduction = process.env.NODE_ENV === 'production';
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// log request URL:
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app.use(async (ctx, next) => {
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console.log(`Process ${ctx.request.method} ${ctx.request.url}...`);
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var
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start = new Date().getTime(),
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execTime;
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await next();
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execTime = new Date().getTime() - start;
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ctx.response.set('X-Response-Time', `${execTime}ms`);
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});
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// static file support:
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if (! isProduction) {
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let staticFiles = require('./static-files');
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app.use(staticFiles('/static/', __dirname + '/static'));
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}
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// parse request body:
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app.use(bodyParser());
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// add nunjucks as view:
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app.use(templating('view', {
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noCache: !isProduction,
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watch: !isProduction
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}));
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// add url-route in /controllers:
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function addMapping(router, mapping) {
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for (var url in mapping) {
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if (url.startsWith('GET ')) {
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var path = url.substring(4);
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router.get(path, mapping[url]);
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console.log(`register URL mapping: GET ${path}`);
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} else if (url.startsWith('POST ')) {
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var path = url.substring(5);
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router.post(path, mapping[url]);
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console.log(`register URL mapping: POST ${path}`);
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} else {
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console.log(`invalid URL: ${url}`);
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}
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}
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}
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function addControllers(router) {
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var files = fs.readdirSync(__dirname + '/controllers');
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var js_files = files.filter((f) => {
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return f.endsWith('.js');
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}, files);
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for (var f of js_files) {
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console.log(`process controller: ${f}...`);
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let mapping = require(__dirname + '/controllers/' + f);
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addMapping(router, mapping);
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}
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}
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addControllers(router);
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// add router middleware:
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app.use(router.routes());
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app.listen(3000);
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console.log('app started at port 3000...');

‎samples/node/web/koa/view-koa/controllers/index.js

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// index:
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module.exports = {
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'GET /': async (ctx, next) => {
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ctx.render('index.html', {
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title: 'Welcome'
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});
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}
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};

‎samples/node/web/koa/view-koa/controllers/signin.js

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// sign in:
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module.exports = {
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'POST /signin': async (ctx, next) => {
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var
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email = ctx.request.body.email || '',
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password = ctx.request.body.password || '';
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if (email === 'admin@example.com' && password === '123456') {
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console.log('signin ok!');
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ctx.render('signin-ok.html', {
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name: 'Mr Node',
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last: new Date(),
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});
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} else {
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console.log('signin failed!');
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ctx.render('signin-failed.html');
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}
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}
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};

‎samples/node/web/koa/view-koa/package.json

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{
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"name": "view-koa",
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"version": "1.0.0",
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"description": "koa 2 example with nunjucks as view",
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"main": "start.js",
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"scripts": {
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"start": "node start.js"
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},
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"keywords": [
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"koa",
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"async",
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"nunjucks"
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],
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"author": "Michael Liao",
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"license": "Apache-2.0",
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"repository": {
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"type": "git",
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"url": "https://github.com/michaelliao/learn-javascript.git"
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},
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"dependencies": {
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"babel-core": "6.13.2",
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"babel-polyfill": "6.13.0",
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"babel-preset-es2015-node6": "0.3.0",
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"babel-preset-stage-3": "6.5.0",
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"koa": "2.0.0",
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"koa-bodyparser": "3.2.0",
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"koa-router": "7.0.0",
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"nunjucks": "2.4.2",
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"mime": "1.3.4",
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"mz": "2.4.0"
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}
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}

‎samples/node/web/koa/view-koa/start.js

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require('babel-core/register')({
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presets: ['stage-3']
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});
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require('./app.js');

‎samples/node/web/koa/view-koa/static-files.js

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const path = require('path');
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const mime = require('mime');
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const fs = require('mz/fs');
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function staticFiles(url, dir) {
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return async (ctx, next) => {
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let rpath = ctx.request.path;
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if (rpath.startsWith(url)) {
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let fp = path.join(dir, rpath.substring(url.length));
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if (await fs.exists(fp)) {
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ctx.response.type = mime.lookup(rpath);
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ctx.response.body = await fs.readFile(fp);
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} else {
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ctx.response.status = 404;
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}
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} else {
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await next();
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}
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};
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}
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module.exports = staticFiles;

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