Category Archives for "CloudFlare"

Thanksgiving’s biggest online shopping day was Cyber Monday, but other days were close behind

Thanksgiving’s biggest online shopping day was Cyber Monday, but other days were close behind
Thanksgiving’s biggest online shopping day was Cyber Monday, but other days were close behind

November comes, the temperatures start to get colder for most of the planet's population (87% live in the Northern Hemisphere) and many are also starting to prepare for the festive season. That also brings significant changes in Internet traffic, most notably the online shopping kind of traffic.

So, what were the November days that e-commerce websites had the most traffic in the US and what about worldwide? Is humanity using more mobile Internet at this time? And what are the most popular days online — is Black Friday the winner?

We’ll dig into those questions using Cloudflare Radar. E-commerce is expanding and at an all-time high, especially after the pandemic accelerated the digital transformation process (e-commerce had a 32.4% increase in sales in the US in 2020 and is expected to grow this year).

Cyber Monday, a ‘last minute’ winner

Let’s start with e-commerce — we added a chart to Radar that shows trends for e-commerce by country. The worldwide trend is pretty evident: Cyber Monday, the day for supposedly last-minute discounts, was the clear winner.

#1. Cyber Monday, November 29.

#2. Monday, November 23.

#3. Black Friday, November 26 — November Continue reading

Attack Maps now available on Radar

Attack Maps now available on Radar
Attack Maps now available on Radar

Cloudflare Radar launched as part of last year’s Birthday Week. We described it as a “newspaper for the Internet”, that gives “any digital citizen the chance to see what’s happening online [which] is part of our pursuit to help build a better, more informed, Internet”.

Since then, we have made considerable strides, including adding dedicated pages to cover how key events such as the UEFA Euro 2020 Championship and the Tokyo Olympics shaped Internet usage in participating countries, and added a Radar section for interactive deep-dive reports on topics such as DDoS.

Today, Radar has four main sections:

  • Main page with near real-time information about global Internet usage.
  • Internet usage details by country (see, for example, Portugal).
  • Domain insights, where searching for a domain returns traffic, registration and certificate information about it.
  • Deep-dive reports on complex and often underreported topics.

Cloudflare’s global network spans more than 250 cities in over 100 countries. Because of this, we have the unique ability to see both macro and micro trends happening online, including insights on how traffic is flowing around the world or what type of attacks are prevalent in a certain country.

Radar Maps will make this information even richer Continue reading

How the US paused shopping (and browsing) for Thanksgiving

How the US paused shopping (and browsing) for Thanksgiving

So, if you like to keep up with the tradition in the United States you and your family yesterday (November 25, 2021) celebrated Thanksgiving. So on a special day, with family gatherings for many and with a lot of cooking if you’re into the tradition (roast turkey, stuffing and pumpkin pie), it makes sense that different Internet patterns show up on Cloudflare Radar.

First, let’s look at shopping habits. After a busy Monday, Tuesday and Wednesday, online shopping paused for Thanksgiving Day and dipped at lunchtime. So in a very good week for e-Commerce, Thanksgiving was an exception, especially at the extended lunchtime.

How the US paused shopping (and browsing) for Thanksgiving

Now, let’s focus on Internet traffic at the time of the Thanksgiving Dinner. First, what time is that? Every family is different, but a 2018 survey of US consumers showed that for 42% early afternoon (between 13:00 and 15:00 is the preferred time to sit at the table and start to dig in). But 16:00 seems to be the “correct time” — The Atlantic explains why.

Cloudflare Radar shows that Internet traffic in the US increased this past seven days, compared with the previous period, and that makes sense given that it’s traditionally a good week for Continue reading

Heard in the halls of Web Summit 2021

Heard in the halls of Web Summit 2021
Opening night of Web Summit 2021, at the Altice Arena in Lisbon, Portugal. Photo by Sam Barnes/Web Summit
Heard in the halls of Web Summit 2021

Global in-person events were back in a big way at the start of November (1-4) in Lisbon, Portugal, with Web Summit 2021 gathering more than 42,000 attendees from 128 countries. I was there to discover Internet trends and meet interesting people. What I saw was the contagious excitement of people from all corners of the world coming together for what seemed like a type of normality in a time when the Internet “is almost as important as having water”, according to Sonia Jorge from the World Wide Web Foundation.

Here’s some of what I heard in the halls.

With a lot happening on a screen, the lockdowns throughout the pandemic showed us a glimpse of what the metaverse could be, just without VR or AR headsets. Think about the way many were able to use virtual tools to work all day, learn, collaborate, order food, supplies, and communicate with friends and family — all from their homes.

While many had this experience, many others were unable to, with some talks at the event focusing on the digital divide and how “Internet access Continue reading

Everything you ever wanted to know about UDP sockets but were afraid to ask, part 1

Everything you ever wanted to know about UDP sockets but were afraid to ask, part 1
Snippet from internal presentation about UDP inner workings in Spectrum. Who said UDP is simple!
Everything you ever wanted to know about UDP sockets but were afraid to ask, part 1

Historically Cloudflare's core competency was operating an HTTP reverse proxy. We've spent significant effort optimizing traditional HTTP/1.1 and HTTP/2 servers running on top of TCP. Recently though, we started operating big scale stateful UDP services.

Stateful UDP gains popularity for a number of reasons:

QUIC is a new transport protocol based on UDP, it powers HTTP/3. We see the adoption accelerating.

We operate WARP — our Wireguard protocol based tunneling service — which uses UDP under the hood.

— We have a lot of generic UDP traffic going through our Spectrum service.

Although UDP is simple in principle, there is a lot of domain knowledge needed to run things at scale. In this blog post we'll cover the basics: all you need to know about UDP servers to get started.

Connected vs unconnected

How do you "accept" connections on a UDP server? If you are using unconnected sockets, you generally don't.

But let's start with the basics. UDP sockets can be "connected" (or "established") or "unconnected". Connected sockets have a full 4-tuple associated {source ip, source port, destination ip, destination port}, unconnected Continue reading

Announcing Argo for Spectrum

Announcing Argo for Spectrum
Announcing Argo for Spectrum

Today we're excited to announce the general availability of Argo for Spectrum, a way to turbo-charge any TCP based application. With Argo for Spectrum, you can reduce latency, packet loss and improve connectivity for any TCP application, including common protocols like Minecraft, Remote Desktop Protocol and SFTP.

The Internet — more than just a browser

When people think of the Internet, many of us think about using a browser to view websites. Of course, it’s so much more! We often use other ways to connect to each other and to the resources we need for work. For example, you may interact with servers for work using SSH File Transfer Protocol (SFTP), git or Remote Desktop software. At home, you might play a video game on the Internet with friends.

To help people that protect these services against DDoS attacks, Spectrum launched in 2018 and extends Cloudflare’s DDoS protection to any TCP or UDP based protocol. Customers use it for a wide variety of use cases, including to protect video streaming (RTMP), gaming and internal IT systems. Spectrum also supports common VoIP protocols such as SIP and RTP, which have recently seen an increase in DDoS ransomware attacks. A lot of Continue reading

Burkina Faso Internet shutdown

Burkina Faso Internet shutdown
Burkina Faso Internet shutdown

A few days after Sudan restored access to the Internet, people living in Burkina Faso are facing an Internet shutdown. On Saturday, Cloudflare Radar shows that after 22:00 UTC (the same local time) Internet traffic went down significantly, something that has happened in the context of social tensions in the country that started on November 14, 2021, and after this Saturday’s shooting of protesters that tried to block a French military convoy.

Burkina Faso Internet shutdown

It is clear when we look at the last 30 days, that Sunday and today, Monday, November 22, are days almost without Internet traffic in Burkina Faso.

Burkina Faso Internet shutdown

All the Internet Service Providers (ISP) of the country were significantly affected by what we could see in our data. That is evident when we look at HTTP traffic by ASN (Autonomous System Number). Orange, FasoNet and Telecel are the three most used ISPs in the country and this chart clearly shows how they were impacted.

Burkina Faso Internet shutdown

Mobile traffic affected

Burkina Faso is a mobile-first country because mobile is the main way of accessing the Internet — in the last 30 days the mobile traffic percentage represented 77% of the total Internet traffic in the country.

We can also Continue reading

Sudan was cut off from the Internet for 25 days

Sudan was cut off from the Internet for 25 days
Sudan was cut off from the Internet for 25 days

Internet traffic started to come back in Sudan (with limitations) on Thursday, November 18, 2021. This happened after 25 days of an almost complete shutdown that affected the whole country. It’s a simple line going up on a chart for us, but for a country that also meant that Internet access was (at least in part) back on with all of what comes with it for businesses, communities, families and society as a whole.

You can see that trend on Cloudflare Radar, in particular after 13:00 UTC (15:00 local time). After that Internet traffic went up like we haven’t seen at all in the previous three weeks.

Sudan was cut off from the Internet for 25 days
Sudan was cut off from the Internet for 25 days

Internet access was mostly cut off on October 25, 2021, after a political turmoil in the country. A Sudanese court previously ordered the restoration of Internet access on November 9, but until last Thursday, November 18, there were no signs of services returning to normal. The biggest Internet access shutdown in recent history in the country was back in 2019 — for a full 36 days.

Looking back at the last 30 days Cloudflare Radar shows very distinctively a big difference from what was previously normal in the country.

Sudan was cut off from the Internet for 25 days

On Wednesday, Continue reading

Network Performance Update: Full Stack Week

Network Performance Update: Full Stack Week

This blog was published on November 20, 2021. As we continue to optimize our network we're publishing regular updates, which are available here.

Network Performance Update: Full Stack Week

A little over two months ago, we shared extensive benchmarking results of last mile networks all around the world. The results showed that on a range of tests (TCP connection time, time to first byte, time to last byte), and on a range of measurements (p95, mean), that Cloudflare was the fastest provider in 49% of networks around the world. Since then, we’ve worked to continuously improve performance until we’re the fastest everywhere. We set a goal to grow the number of networks where we’re the fastest by 10% every Innovation Week. We met that goal during Birthday Week (September 2021).

Today, we’re proud to report we blew the goal away for Full Stack Week (November 2021). Cloudflare measured our performance against the top 1,000 networks in the world (by number of IPv4 addresses advertised). Out of those, Cloudflare has become the fastest provider in 79 new networks, an increase of 14% of these 1,000 networks. Of course, we’re not done yet, but we wanted to share the latest results and explain how we did it.

However, Continue reading

Announcing native support for Stripe’s JavaScript SDK in Cloudflare Workers

Announcing native support for Stripe’s JavaScript SDK in Cloudflare Workers

This post is also available in 日本語, 简体中文.

Announcing native support for Stripe’s JavaScript SDK in Cloudflare Workers

Handling payments inside your apps is crucial to building a business online. For many developers, the leading choice for handling payments is Stripe. Since my first encounter with Stripe about seven years ago, the service has evolved far beyond simple payment processing. In the e-commerce example application I shared last year, Stripe managed a complete seller marketplace, using the Connect product. Stripe's product suite is great for developers looking to go beyond accepting payments.

Earlier versions of Stripe's SDK had core Node.js dependencies, like many popular JavaScript packages. In Stripe’s case, it interacted directly with core Node.js libraries like net/http, to handle HTTP interactions. For Cloudflare Workers, a V8-based runtime, this meant that the official Stripe JS library didn’t work; you had to fall back to using Stripe’s (very well-documented) REST API. By doing so, you’d lose the benefits of using Stripe’s native JS library — things like automatic type-checking in your editor, and the simplicity of function calls like stripe.customers.create(), instead of manually constructed HTTP requests, to interact with Stripe’s various pieces of functionality.

In April, we wrote that we were focused on Continue reading

New Stream Player customizations to boost your video experience

New Stream Player customizations to boost your video experience
New Stream Player customizations to boost your video experience

When we launched Stream, one of our goals was to provide the most performant video player. We focused on building a player that loads fast, works across different browsers and frameworks, and intelligently switches video quality levels depending on your end user’s connectivity.

We are expanding the Stream Player vision, so you can control the look and feel of the viewing experience. Today, we are announcing a series of new customization options to help you deliver the best video playback experience.

Add Your Own Color

One thing we kept hearing from customers is that they would like to be able to customize the Stream Player to better reflect their brand. Stream Player now supports setting a primary color to match your company’s color. Here is an example of us using the primaryColor property to set the primary color to the Cloudflare Orange.

To use the primaryColor property, simply add it to the iframe URL. In this example, the hex code is #F48120 and the uri-encoded value is %23F48120.

If you are using the React or Angular wrapper, you can use the primaryColor prop to customize the player color.

Currently, setting the primary color property will change Continue reading

Launching a Startup on Cloudflare Workers

Launching a Startup on Cloudflare Workers
Launching a Startup on Cloudflare Workers

Closing out the Developer Spotlight series for this week is Tejas Mehta who shares how he built his startup, cClip.

cClip is a great tool that allows you to “copy/paste” and transfer files between any of your devices, regardless of what OS they run.

What is so interesting about cClip though is that it is a fully serverless application built on top of Workers and KV, but not exclusively. It uses Firebase for authentication, RevenueCat for a consolidated view over the Apple and Google Play store, and Stripe for all other billing related work.

This is a peek into the future of application development. This is a future where we will be “importing” other SaaS applications as easily as we currently import a package from a package manager. And not only unidirectional by calling APIs on that external application, but bi-directional communication through events with Webhooks.

Here is Tejas telling his story.

The origins of cClip

The abrupt transition to virtual schooling last year led to all my school communications and assignments transitioning online. With a MacBook laptop and an Android phone, submitting my precalculus homework meant I had to take a picture of each page, email each picture to Continue reading

An Open-Source CMS on the Cloudflare Stack: Introductory Post

An Open-Source CMS on the Cloudflare Stack: Introductory Post
An Open-Source CMS on the Cloudflare Stack: Introductory Post

The Cloudflare documentation is a great resource when learning concepts, reviewing API usage notes, or when you’re in need of a concise snippet to illustrate those APIs or concepts. But, as comprehensive as it is, new users to the Cloudflare Workers platform must bridge a large gap to go from the introductory example snippets to a real, production-ready application. While some of this may be specific to Workers (as with any platform), developers everywhere are figuring out how applications should be built in a serverless world. Building large serverless applications entails a learning curve journey, regardless of a developer’s experience level.

At Cloudflare, we’re intimately aware of this because we also had to go through the same transition. Our engineers are world-class and expertfully design and craft products that compliment the distributed paradigm… but experts aren’t born overnight! We have been there, and we want to help jumpstart and aid others’ understanding.

With this in mind, we decided to do something unique to the industry: we are developing an example feature-complete SaaS application that will be built entirely on the Cloudflare stack. It is and will continue to be completely free, open-sourced on GitHub, and developed in public. This Continue reading

Build your next video application on Cloudflare

Build your next video application on Cloudflare
Build your next video application on Cloudflare

Historically, building video applications has been very difficult. There's a lot of complicated tech behind recording, encoding, and playing videos. Luckily, Cloudflare Stream abstracts all the difficult parts away, so you can build custom video and streaming applications easily. Let's look at how we can combine Cloudflare Stream, Access, Pages, and Workers to create a high-performance video application with very little code.

Today, we’re going to build a video application inspired by Cloudflare TV. We’ll have user authentication and the ability for administrators to upload recorded videos or livestream new content. Think about being able to build your own YouTube or Twitch using Cloudflare services!

Fetching a list of videos

On the main page of our application, we want to display a list of all videos. The videos are uploaded and stored with Cloudflare Stream, but more on that later! This code could be changed to display only the "trending" videos or a selection of videos chosen for each user. For now, we'll use the search API and pass in an empty string to return all.

import { getSignedStreamId } from "../../src/cfStream"

export async function onRequestGet(context) {
    const {
    } = context

    const { id  Continue reading

Workers, Now Even More Unbound: 15 Minutes, 100 Scripts, and No Egress

Workers, Now Even More Unbound: 15 Minutes, 100 Scripts, and No Egress
Workers, Now Even More Unbound: 15 Minutes, 100 Scripts, and No Egress

Our mission is to enable developers to build their applications, end to end, on our platform, and ruthlessly eliminate limitations that may get in the way. Today, we're excited to announce you can build large, data-intensive applications on our network, all without breaking the bank; starting today, we're dropping egress fees to zero.

More Affordable: No Egress Fees

Building more on any platform historically comes with a caveat — high data transfer cost. These costs often come in the form of egress fees. Especially in the case of data intensive workloads, egress data transfer costs can come at a high premium, depending on the provider.

What exactly are data egress fees? They are the costs of retrieving data from a cloud provider. Cloud infrastructure providers generally pay for bandwidth based on capacity, but often bill customers based on the amount of data transferred. Curious to learn more about what this means for end users? We recently wrote an analysis of AWS’ Egregious Egress — a good read if you would like to learn more about the ‘Hotel California’ model AWS has spun up. Effectively, data egress fees lock you into their platform, making you choose your provider based not on Continue reading

Cloudflare Images introduces AVIF, Blur and Bundle with Stream

Cloudflare Images introduces AVIF, Blur and Bundle with Stream
Cloudflare Images introduces AVIF, Blur and Bundle with Stream

Two months ago we launched Cloudflare Images for everyone, and we are amazed about the adoption and the feedback we received.

Let’s start with some numbers:

More than 70 million images delivered per day on average in the week of November 5 to 12.

More than 1.5 million images have been uploaded so far, growing faster every day.

But we are just getting started and are happy to announce the release of the most requested features, first we talk about the AVIF support for Images, converting as many images as possible with AVIF results in highly compressed, fast delivered images without compromising on the quality.

Secondly we introduce blur. By blurring an image, in combination with the already supported protection of private images via signed URL, we make Cloudflare Images a great solution for previews for paid content.

For many of our customers it is important to be able to serve Images from their own domain and not only via Here we show an easy solution for this using a custom Worker or a special URL.

Last but not least we announce the launch of new attractively priced bundles for both Cloudflare Images and Stream.

Images Continue reading

Developer Spotlight: Automating Workflows with Airtable and Cloudflare Workers

Developer Spotlight: Automating Workflows with Airtable and Cloudflare Workers
Developer Spotlight: Automating Workflows with Airtable and Cloudflare Workers

Next up on the Developer Spotlight is another favourite of mine. Today’s post is by Jacob Hands. Jacob operates TriTails Premium Beef, which is an online store for meat, a very perishable good. So he has a lot of unique challenges when it comes to shipping. To deal with their growth, Jacob, a developer by trade, turned to Airtable and Cloudflare Workers to automate a lot of their workflow.

One of Jacob’s quotes is one of my favourites:

“Sure, Cloudflare Workers allows you to scale to billions of requests per day, but it is also awesome for a few hundred requests a day.”

Here is Jacob talking about how it only took him a few days to put together a fully customised workflow tool by integrating Airtable and Workers. And how it saves them multiple hours every single day.

Shipping Requirements

Working at a new e-commerce business shipping perishable goods has several challenges as operations scale up. One of our biggest challenges is that daily shipping throughput is limited. Partly because of a small workspace, limiting how many employees can simultaneously pack orders, and also because despite having a requested pickup time with UPS, they often show up Continue reading

Modifying HTTP response headers with Transform Rules

Modifying HTTP response headers with Transform Rules
Modifying HTTP response headers with Transform Rules

HTTP headers are central to how the web works. They are used for passing additional information between the client and server, such as which security permissions to apply and information about the client, allowing the correct content to be served.

Today we are announcing the immediate availability of the third action within Transform Rules, “HTTP Response Header Modification”, available for all Cloudflare plans. This new functionality provides Cloudflare users the ability to set or remove HTTP response headers as traffic returns through Cloudflare back to the client. This allows customers to enrich responses with information about how their request was handled, debugging information and even recruitment messages.

Previously, HTTP response header modification was done using a Cloudflare Worker. Today we’re introducing an easier way to do this without writing a single line of code.

Luggage tags of the World Wide Web

Modifying HTTP response headers with Transform Rules

Think of HTTP headers as the “luggage tag” attached to your bags when you check in at the airport.

Generally, you don't need to know what those numbers and words mean. You just know they are important in getting your suitcase from the boarding desk, to the correct airplane, and back to the correct luggage carousel at your destination.

Continue reading

The Cloudflare Developer Expert Program: apply today!

The Cloudflare Developer Expert Program: apply today!
The Cloudflare Developer Expert Program: apply today!

Today we’re launching the Cloudflare Developer Expert Program: an initiative to support and recognize our VIP users who build with Workers, Pages, and the entire Cloudflare developer ecosystem.

A Cloudflare Developer Expert is an early adopter of new releases, a frequent participant in feedback sessions, and an evangelist for Cloudflare products made for the larger developer community.

But first, what are the benefits of becoming a Cloudflare Developer Expert?

  • Early access to features (e.g., private betas)
  • Admission to a private community of power users
  • Routine calls with product managers, engineers, and developer advocates
  • Sponsorships for OSS work
  • Our best swag, of course

We have already sent invites to our first batch of power users, but if you’d like to join or want to nominate a developer, please fill out this form.

Why We Made This Program

We ship very quickly at Cloudflare.

This is because we want feedback early in development, allowing users to challenge our assumptions and validate what we’re building. In the Workers team, this strategy has been very successful.

For example, we began beta testing custom builds for Wrangler (our CLI tool) that allow you to run any JavaScript bundler you want. This was Continue reading

Cloudflare Pages Goes Full Stack

Cloudflare Pages Goes Full Stack
Cloudflare Pages Goes Full Stack

When we announced Cloudflare Pages as generally available in April, we promised you it was just the beginning. The journey of our platform started with support for static sites with small bits of dynamic functionality like setting redirects and custom headers. But we wanted to give even more power to you and your teams to begin building the unimaginable. We envisioned a future where your entire application — frontend, APIs, storage, data — could all be deployed with a single commit, easily testable in staging and requiring a single merge to deploy to production. So in the spirit of “Full Stack” Week, we’re bringing you the tools to do just that.

Welcome to the future, everyone. We’re thrilled to announce that Pages is now a Full Stack platform with help from But how?

It works the exact same way Pages always has: write your code, git push to your git provider (now supporting GitLab!) and we’ll deploy your entire site for you. The only difference is, it won’t just be your frontend but your backend too using Cloudflare Workers to help deploy serverless functions.

The integration you’ve been waiting for

Cloudflare Workers provides a serverless execution environment that allows you to create entirely new applications or augment existing ones without configuring or maintaining infrastructure. Before today, it was possible to connect Workers to a Pages project—installing Wrangler and manually deploying a Worker by writing your app in both Pages and Workers. But we didn’t just want “possible”, we wanted something that came as second nature to you so you wouldn’t have to think twice about adding dynamic functionality to your site.

How it works

By using your repo’s filesystem convention and exporting one or more function handlers, Pages can leverage Workers to deploy serverless functions on your behalf. To begin, simply add a ./functions directory in the root of your project, and inside a JavaScript or TypeScript file, export a function handler. For example, let’s say in your ./functions directory, you have a file, hello.js, containing:

// GET requests to /filename would return "Hello, world!"
export const onRequestGet = () => {
  return new Response("Hello, world!")
// POST requests to /filename with a JSON-encoded body would return "Hello, <name>!"
export const onRequestPost = async ({ request }) => {
  const { name } = await request.json()
  return new Response(`Hello, ${name}!`)

If you perform a git commit, it will trigger a new Pages build to deploy your dynamic site! During the build pipeline, Pages traverses your directory, mapping the filenames to URLs relative to your repo structure.

Under the hood, Pages generates Workers which include all your routing and functionality from the source.  Functions supports deeply-nested routes, wildcard matching, middleware for things like authentication and error-handling, and more! To demonstrate all of its bells and whistles, we’ve created a blog post to walk through an example full stack application.

Letting you do what you do best

As your site grows in complexity, with Pages’ new full stack functionality, your developer experience doesn’t have to. You can enjoy the workflow you know and love while unlocking even more depth to your site.

Seamlessly build

In the same way we’ve handled builds and deployments with your static sites — with a `git commit` and `git push` — we’ll deploy your functions for you automatically. As long as your directory follows the proper structure, Pages will identify and deploy your functions to our network with your site.

Define your bindings

While bringing your Workers to Pages, bindings are a big part of what makes your application a full stack application. We’re so excited to bring to Pages all the bindings you’ve previously used with regular Workers!

  • KV namespace: Our serverless and globally accessible key-value storage solution. Within Pages, you can integrate with any of the KV namespaces you set in your Workers dashboard for your Pages project.
  • Durable Object namespace: Our strongly consistent coordination primitive that makes connecting WebSockets, handling state and building entire applications a breeze. As with KV, you can set your namespaces within the Workers dashboard and choose from that list within the Pages interface.
  • R2 (coming soon!): Our S3-compatible Object Storage solution that’s slashing egress fees to zero.
  • Environment Variable: An injected value that can be accessed by your functions and is stored as plain-text. You can set your environment variables directly within the Pages interface for both your production and preview environments at build-time and run-time.
  • Secret (coming soon!): An encrypted environment variable, which cannot be viewed by wrangler or any dashboard interfaces. Secrets are a great home for sensitive data including passwords and API tokens.
Cloudflare Pages Goes Full Stack

Preview deployments — now for your backend too

With the deployment of your serverless functions, you can still enjoy the ease of collaboration and testing like you did previously. Before you deploy to production, you can easily deploy your project to a preview environment to stage your changes. Even with your functions, Pages lets you keep a version history of every commit with a unique URL for each, making it easy to gather feedback whether it’s from a fellow developer, PM, designer or marketer! You can also enjoy the same infinite staging privileges that you did for static sites, with a consistent URL for the latest changes.

Develop and preview locally too

However, we realize that building and deploying with every small change just to stage your changes can be cumbersome at times if you’re iterating quickly. You can now develop full stack Pages applications with the latest release of our wrangler CLI. Backed by Miniflare, you can run your entire application locally with support for mocked secrets, environment variables, and KV (Durable Objects support coming soon!). Point wrangler at a directory of static assets, or seamlessly connect to your existing tools:

# Install wrangler v2 beta
npm install [email protected]

# Serve a folder of static assets
npx wrangler pages dev ./dist

# Or automatically proxy your existing tools
npx wrangler pages dev -- npx react-scripts start

This is just the beginning of Pages' integrations with wrangler. Stay tuned as we continue to enhance your developer experience.

What else can you do?

Everything you can do with HTTP Workers today!

When deploying a Pages application with functions, Pages is compiling and deploying first class Workers on your behalf. This means there is zero functionality loss when deploying a Worker within your Pages application — instead, there are only new benefits to be gained!

Integrate with SvelteKit — out of the box!

SvelteKit is a web framework for building Svelte applications. It’s built and maintained by the Svelte team, which makes it the Svelte user’s go-to solution for all their application needs. Out of the box, SvelteKit allows users to build projects with complex API backends.

As of today, SvelteKit projects can attach and configure the @sveltejs/adapter-cloudflare package. After doing this, the project can be added to Pages and is ready for its first deployment! With Pages, your SvelteKit project(s) can deploy with API endpoints and full server-side rendering support. Better yet, the entire project — including the API endpoints — can enjoy the benefits of preview deployments, too! This, even on its own, is a huge victory for advanced projects that were previously on the Workers adapter. Check out this example to see the SvelteKit adapter for Pages in action!

Use server-side rendering

You are now able to intercept any request that comes into your Pages project. This means that you can define Workers logic that will receive incoming URLs and, instead of serving static HTML, your Worker can render fresh HTML responses with dynamic data.

For example, an application with a product page can define a single product/[id].js file that will receive the id parameter, retrieve the product information from a Workers KV binding, and then generate an HTML response for that page. Compared to a static-site generator approach, this is more succinct and easier to maintain over time since you do not need to build a static HTML page per product at build-time… which may potentially be tens or even hundreds of thousands of pages!

Already have a Worker? We’ve got you!

If you already have a single Worker and want to bring it right on over to Pages to reap the developer experience benefits of our platform, our announcement today also enables you to do precisely that. Your build can generate an ES module Worker called _worker.js in the output directory of your project, perform your git commands to deploy, and we’ll take care of the rest! This can be especially advantageous to you if you’re a framework author or have a more complex use case that doesn’t follow our provided file structure.

Try it at no cost — for a limited time only

We’re thrilled to be releasing our open beta today for everyone to try at no additional cost to your Cloudflare plan. While we will still have limits in place, we are using this open beta period to learn more about how you and your teams are deploying functions with your Pages projects. For the time being, we encourage you to lean into your creativity and build out that site you’ve been thinking about for a long time — without the worry of getting billed.

In just a few short months, when we announce General Availability, you can expect our billing to reflect that of the Workers Bundled plan — after all, these are just Workers under the hood!

Coming up…

As we’re only announcing this release as an open beta, we have some really exciting things planned for the coming weeks and months. We want to improve on the quick and easy Pages developer experience that you're already familiar with by adding support for integrated logging and more analytics for your deployed functions.

Beyond that, we'll be expanding our first-class support for the next generation of frontend frameworks. As we've shown with SvelteKit, Pages' ability to seamlessly deploy both static and dynamic code together enables unbeatable end-user performance & developer ease, and we're excited to unlock that for more people. Fans of similar frameworks & technologies, such as NextJS, NuxtJS, React Server Components, Remix, Hydrogen, etc., stay tuned to this blog for more announcements. Or better yet, come join us and help make it happen!

Additionally, as we’ve done with SvelteKit, we’re looking to include more first-class integration with existing frameworks, so Pages can become the primary home for your preferred frameworks of choice. Work is underway on making NextJS, NuxtJS, React Server Components, Shopify Hydrogen and more integrate seamlessly as you develop your full stack apps.

Finally, we’re working to speed up those build times, so you can focus on pushing changes and iterating quickly — without the wait!

Getting started

To get started head over to our Pages docs and check out our demo blog to learn more about how to deploy serverless functions to Pages using Cloudflare Workers.

Of course, what we love most is seeing what you build! Pop into our Discord and show us how you’re using Pages to build your full stack apps.

Cloudflare Pages Goes Full Stack
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