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Kévin Dunglas

Founder of Les-Tilleuls.coop (worker-owned cooperative). Creator of API Platform, Mercure.rocks, Vulcain.rocks and of some Symfony components.

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Category: Go

Mercure 0.14: Major Performance Improvement and New Features

Posted on September 6, 2022September 7, 2022 by Kévin Dunglas

I’m very pleased to announce the immediate availability of the Mercure.rocks hub version 0.14. Mercure is a free and open-source solution for real-time communication. With Mercure, securely push data to all your connected users with a simple POST request. No third-party library or SDK is required: the browser (or any other type of client) receives…

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Goroutines, threads, and thread IDs

Posted on May 31, 2022May 31, 2022 by Kévin Dunglas

If you attended AFUP Day 2022, you might know that I am currently working on a PHP module for web servers written in Go. While testing my upcoming library, I encountered strange memory access issues related to the threads created by the Go runtime (you know, cgo…). By default, the Go scheduler runs many goroutines…

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New in Caddy 2.5: Redact Sensitive Data from Your Logs

Posted on April 29, 2022April 29, 2022 by Kévin Dunglas

Caddy is the rising star of web servers. It is fast, easy to configure, fully featured (automatic TLS certificate generation and renewal, HTTP/3, cloud-native, config hot reloading…), and secure (it is written in Go, not in C). Thanks to its unmatched extensibility that makes it a top-notch app platform, Caddy has a thriving ecosystem! To…

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Preventing CORS Preflight Requests Using Content Negotiation

Posted on January 3, 2022January 4, 2022 by Kévin Dunglas

In modern web applications, it’s a common pattern to serve the web API and the frontend app from different subdomains: https://api.example.com: your web API, usually serving JSON documents https://example.com: your web application, usually built in JavaScript, generating HTML documents from the raw JSON data retrieved from the API This was the pattern implemented by API…

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Webperf: PHP after Server Push

Posted on May 28, 2021July 6, 2021 by Kévin Dunglas

Here are the slide deck from the talk I gave this morning for AFUP Day 2021! And here is the video (in French): Google recently announced that it will remove Server Push support from its flagship browser. Server Push is a technology that is part of the HTTP/2 and HTTP/3 standards. Server Push is designed…

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Using the “103 Early Hints” Status Code in Go Applications

Posted on February 17, 2021August 9, 2022 by Kévin Dunglas

103 is a new experimental HTTP status code defined in RFC 8297. It’s an informational status that can be sent by a server before the main HTTP response. Used in conjunction with the Link HTTP header and the preload relation, 103 gives the client the opportunity to fetch resources (assets, images, linked API documents…) related…

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The Mercure.rocks Hub is now based on Caddy Web Server

Posted on November 28, 2020January 19, 2021 by Kévin Dunglas

I’m very happy to announce the immediate availability of the Mercure.rocks Hub version 0.11! The Mercure.rocks Hub is a free software implementing the Mercure specification, an open protocol for fast, reliable and battery-efficient in-browser real-time communications. Version 0.11 is a major milestone for the project! As you may know, the Mercure.rocks Hub is written in…

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A Structured HTTP Fields Parser and Serializer for the Go Programming Language

Posted on August 26, 2020August 26, 2020 by Kévin Dunglas

“Structured Field Values for HTTP” is an upcoming RFC defining a set of well-defined data types to use in HTTP headers and trailers. This new format will improve the interoperability and the safety of HTTP by allowing to create generic parsers and serializers suitable for all HTTP headers (currently, most headers need a custom parser)…

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Say Hello to Mercure 0.10!

Posted on June 16, 2020June 16, 2020 by Kévin Dunglas

I’m very excited to announce the immediate availability of the version 6 of the Mercure Internet Draft as well as of the version 0.10 of the reference implementation! Mercure is a real-time protocol built on top of Server-sent Events and leveraging HTTP/2+. It allows to push messages to JavaScript webapps, mobile apps or IoT devices…

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Vulcain: HTTP/2 Server Push
 and the rise of client-driven REST APIs

Posted on November 22, 2019September 26, 2021 by Kévin Dunglas

Watch a longer video (English)!Watch a French version. Over the years, several formats have been created to fix performance bottlenecks of web APIs: the n+1 problem, over fetching, under fetching… The current hipster solution for these problems is to replace the conceptual model of HTTP (resource-oriented), by the one of GraphQL. It’s a smart network…

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Recent Posts

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