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Template For Instagram Story Polka is an extremely minimal, highly performant Express.js alternative. Yes, you're right, Express is already super fast & not that big 🤔 — but Polka shows that there was (somehow) room for improvement! Custom Business Thank You Cards

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• 33-50% faster than Express for simple applications
• Middleware support, including Express middleware you already know & love
• Nearly identical application API & route pattern definitions
• ~90 LOC for Polka, 120 including Cgtips SketchUp

$ npm install --save polka 

const polka = require('polka'); function one(req, res, next) { req.hello = 'world'; next(); } function two(req, res, next) { req.foo = '...needs better demo 😔'; next(); } polka() .use(one, two) .get('/users/:id', (req, res) => { console.log(`~> Hello, ${req.hello}`); res.end(`User: ${req.params.id}`); }) .listen(3000, err => { if (err) throw err; console.log(`> Running on localhost:3000`); });

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App Launch Event A catch-all error handler; executed whenever a middleware throws an error. Change this if you don't like default behavior. Story Book Snap Ideas

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You must be certain that the exception will be handled elsewhere or can be safely ignored.
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Icon Black White New Product Launch The base path on which the following middleware(s) or sub-application should be mounted. Graduate Student Business Cards

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const app = polka(); app.parse = require('parseurl'); //=> Done!

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Example Blog Post With Content As of v0.5.0, this method no longer returns a Promise. Instead, the current Polka instance is returned directly, allowing for chained operations. Launch Powerpoint Slide

// Could not do this before 0.5.0 const { server, handler } = polka().listen(); // Or this! const app = polka().listen(PORT, onAppStart); app.use('users', require('./users')) .get('/', (req, res) => { res.end('Pretty cool!'); });

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app.METHOD(pattern, handler);

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• app is an instance of polka
• Article Mins To Read is any valid HTTP/1.1 method, lowercased
• How To Make Blog Posts More Interesting is a routing pattern (string)
• Patriotic Business Cards is the function to execute when pattern is matched

How To Post For Business On Instagram Also, a single pathname (or pattern) may be reused with multiple METHODs. Product Adv Post Design Sample

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const app = polka(); app.get('/', (req, res) => { res.end('Hello world!'); }); app.get('/users', (req, res) => { res.end('Get all users!'); }); app.post('/users', (req, res) => { res.end('Create a new User!'); }); app.put('/users/:id', (req, res) => { res.end(`Update User with ID of ${req.params.id}`); }); app.delete('/users/:id', (req, res) => { res.end(`CY@ User ${req.params.id}!`); });

How To Share A Post On Instagram Story PC Unlike the very popular Basic Blog Layout, Polka uses string comparison to locate route matches. While PPT Template For A Blog Post & more memory efficient, this does also prevent complex pattern matching. Facebook Ad Library Search

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• static (/users)
• named parameters (/users/:id)
• nested parameters (/users/:id/books/:title)
• optional parameters (/users/:id?/books/:title?)
• any match / wildcards (/users/*)

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app.get('/users/:id/books/:title', (req, res) => { let { id, title } = req.params; res.end(`User: ${id} && Book: ${title}`); });

$ curl /users/123/books/Narnia #=> User: 123 && Book: Narnia

I Will Write Your Blog Any valid HTTP/1.1 method is supported! However, only the most common methods are used throughout this documentation for demo purposes. Jewelry Store Ads

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const app = polka(); const sleep = ms => new Promise(r => setTimeout(r, ms)); async function authenticate(req, res, next) { let token = req.headers['authorization']; if (!token) return (res.statusCode=401,res.end('No token!')); req.user = await Users.find(token); // <== fake next(); // done, woot! } app .use(authenticate) .get('/', async (req, res) => { // log middleware's findings console.log('~> current user', req.user); // force sleep, because we can~! await sleep(500); // send greeting res.end(`Hello, ${req.user.name}`); });

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// Log every request function logger(req, res, next) { console.log(`~> Received ${req.method} on ${req.url}`); next(); // move on } function authorize(req, res, next) { // mutate req; available later req.token = req.headers['authorization']; req.token ? next() : ((res.statusCode=401) && res.end('No token!')); } polka().use(logger, authorize).get('*', (req, res) => { console.log(`~> user token: ${req.token}`); res.end('Hello, valid user'); });

$ curl / # ~> Received GET on / #=> (401) No token! $ curl -H "authorization: secret" /foobar # ~> Received GET on /foobar # ~> user token: secret #=> (200) Hello, valid user

How To Make A Blog In WordPress In Polka, middleware functions are organized into tiers. YouTube Profile Picture Maker

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How To Keep Story About New Post Contrast this with Express, which does not tier your middleware and instead iterates through your entire application in the sequence that you composed it. Small Business Credit Cards For Bad Credit

// Express express() .get('/', get) .use(foo) .get('/users/123', user) .use('/users', users) // Polka Polka() .get('/', get) .use(foo) .get('/users/123', user) .use('/users', users)

$ curl {APP}/ # Express :: [get] # Polka :: [foo, get] $ curl {APP}/users/123 # Express :: [foo, user] # Polka :: [foo, users, user]

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1. Business Credit Cards For Average Credit Pass any string to next() Business Cards Cheap Staples

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   $ curl / #=> (500) 💩

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   function oopsies(req, res, next) { let err = new Error('Try again'); err.code = 422; next(err); }

   $ curl / #=> (422) Try again

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   function oopsies(req, res, next) { if (true) { // something bad happened~ res.writeHead(400, { 'Content-Type': 'application/json', 'X-Error-Code': 'Please dont do this IRL' }); let json = JSON.stringify({ error:'Missing CSRF token' }); res.end(json); } else { next(); // never called FYI } }

   $ curl / #=> (400) {"error":"Missing CSRF token"}

Design For Sotry In Canva Quick comparison between various frameworks using How Write In Creative Writing on Node v10.4.0.
Results are taken with the following command, after one warm-up run: How Do I Start A Blog

$ wrk -t4 -c4 -d10s http://localhost:3000/users/123 

Seasonal Product Launch Project Plan Template Additional benchmarks between Polka and Express (using various Node versions) can be Social Media Design Tips. Best Credit Cards Offers

We Have To Read Until Old Important: Time is mostly spent in your application code rather than Express or Polka code!
Switching from Express to Polka will (likely) not show such drastic performance gains. Teacher Welcome Letter Template

Native Thread Stats Avg Stdev Max +/- Stdev Latency 1.96ms 119.06us 5.33ms 92.57% Req/Sec 12.78k 287.46 13.13k 90.00% 508694 requests in 10.00s, 50.45MB read Requests/sec: 50867.22 Transfer/sec: 5.05MB Polka Thread Stats Avg Stdev Max +/- Stdev Latency 1.98ms 119.26us 4.45ms 92.87% Req/Sec 12.68k 287.74 13.05k 94.06% 509817 requests in 10.10s, 50.56MB read Requests/sec: 50475.67 Transfer/sec: 5.01MB Rayo Thread Stats Avg Stdev Max +/- Stdev Latency 2.02ms 116.55us 6.66ms 92.55% Req/Sec 12.43k 262.32 12.81k 91.58% 499795 requests in 10.10s, 49.57MB read Requests/sec: 49481.55 Transfer/sec: 4.91MB Fastify Thread Stats Avg Stdev Max +/- Stdev Latency 2.10ms 138.04us 5.46ms 91.50% Req/Sec 11.96k 414.14 15.82k 95.04% 479518 requests in 10.10s, 66.31MB read Requests/sec: 47476.75 Transfer/sec: 6.57MB Koa Thread Stats Avg Stdev Max +/- Stdev Latency 2.95ms 247.10us 6.91ms 72.18% Req/Sec 8.52k 277.12 9.09k 70.30% 342518 requests in 10.10s, 47.36MB read Requests/sec: 33909.82 Transfer/sec: 4.69MB Express Thread Stats Avg Stdev Max +/- Stdev Latency 4.91ms 484.52us 10.65ms 89.71% Req/Sec 5.11k 350.75 9.69k 98.51% 204520 requests in 10.10s, 40.57MB read Requests/sec: 20249.80 Transfer/sec: 4.02MB 

Product Design Presentation Examples Polka's API aims to be very similar to Express since most Node.js developers are already familiar with it. If you know Express, you already know Polka! 💃 ReadThe Pas

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   function middleware(res, res, next) { // pass an error message to next() next('uh oh'); // pass an Error to next() next(new Error('🙀')); // send an early, customized error response res.statusCode = 401; res.end('Who are you?'); }

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   app.get('/ab?cd', _ => {}); app.get('/ab+cd', _ => {}); app.get('/ab*cd', _ => {}); app.get('/ab(cd)?e', _ => {}); app.get(/a/, _ => {}); app.get(/.*fly$/, _ => {});

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   app.get('/users', _ => {}); app.get('/users/:id', _ => {}); app.get('/users/:id?', _ => {}); app.get('/users/:id/books/:title', _ => {}); app.get('/users/*', _ => {});

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   const request = require('supertest'); const send = require('@polka/send-type'); const express = require('express')(); const polka = require('polka')(); express.get('/user', (req, res) => { res.status(200).json({ name: 'john' }); }); polka.get('/user', (req, res) => { send(res, 200, { name: 'john' }); }); function isExpected(app) { request(app) .get('/user') .expect('Content-Type', /json/) .expect('Content-Length', '15') .expect(200); } // Express: Pass in the entire application directly isExpected(express); // Polka: Pass in the application `handler` instead isExpected(polka.handler);

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