WebSockets now Generally Available

WebSocket support was introduced as a Labs feature last year, and we went through extensive testing and a number of technical iterations to improve performance and to provide a predictable compliance target. Thanks to great interaction with the community and early feature users, we now have a fast and robust solution available in production.

Why WebSockets

WebSockets provide bi-directional and full-duplex channels, allowing you to create applications with support for streaming, flexible protocols, and persistent connections.

Getting Started with New Apps

If you are creating a new application on Heroku, there is no need to enable WebSockets or to configure your application to use the...

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Faster Database forking

Did you know that Heroku databases can be forked? Forking a database creates a byte-for-byte copy that can be used for testing and development. It is a useful tool that allows teams to be agile with their data.

Today, forking databases is becoming faster. Fast forking reduces the time to create a fork by hours for high transaction database. To quickly fork a database, simply add the --fast flag:

$ heroku addons:add heroku-postgresql:crane --fork BLUE --fast 

Fast forks behave differently from regular forks. They take less time to create, but the data will be somewhat out-of-date (as much as 30 hours). If your data has not changed significantly and you have not performed any schema...

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Introducing the app.json Application Manifest

Developers want to spend less time setting up applications and start working with the code sooner. Setting up applications is error-prone, time consuming and interruptive to the development flow. Often, there are several steps to go from your code or other samples and templates that you find in repositories online, to a running application that you can continue to work on.

Today, we are excited to introduce the app.json manifest. app.json enables developers to define their applications' details, setup configurations and runtime environments in a structured way. Instead of providing step-by-step instructions, you can now add app.json files to your applications' source code. You...

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Introducing programmatic builds on Heroku

Today, we are announcing an important addition to the Heroku Platform API: The /apps/:app/builds endpoint. This endpoint exposes the Heroku slug compilation process as a simple API primitive. You can use the endpoint to turn any publicly hosted source-tarball into a slug running on a Heroku app in seconds.

Here’s output from a Go program that invokes the new endpoint:

$ ./build -app limitless-fjord-5604 -archive https://github.com/heroku/node-js-sample/archive/master.tar.gz ......... -----> Node.js app detected -----> Requested node range: 0.10.x -----> Resolved node version: 0.10.28 -----> Downloading and installing node … $ curl http://limitless-fjord-5604.herokuapp.com/...
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The Heroku HTTP API Toolchain

Today we’re open sourcing the toolchain Heroku uses to design, document, and consume our HTTP APIs. We hope this shows how Heroku thinks about APIs and gives you new tools to create your own.

This toolchain includes:

  • An HTTP API design guide, describing how we structure both internal and public-facing APIs and document them using the JSON Schema standard.

  • A tool for working with JSON schemas and using them to generate API documentation.

  • Ruby and Go client code generators for APIs with JSON schemas.

Here’s some more information about these things, how we use them at Heroku, and an explanation of how you can try them yourself.

JSON Schema Foundation

We’ve developed the toolchain around...

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