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Jan-Erik Rediger 2018-02-07 09:15:21 +01:00
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_posts/2018-02-07-d-oh-dns-over-https-in-rust.md
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Last weekend I met [Daniel Stenberg][bagder], author of curl, at FOSDEM and we talked a bit about curl, Firefox and also Rust.
One recent project he was working on was *DNS over HTTPS* [support for Firefox][firefox] and [eventually for curl][curl] as well.
*DNS over HTTPS*, short *DOH*, is a recent idea to do DNS queries over HTTPS for privacy, performance and security reasons. There's a [RFC draft in version 3][draft03][^1] at the IETF describing it in more detail.
The *tl;dr*: Send the DNS protocol in a HTTP POST request or base64-encoded in a GET request,
*DNS over HTTPS*, short *DOH*, is a recent idea to do DNS queries over HTTPS for privacy, performance and security reasons. There's an [RFC draft in version 3][draft03][^1] at the IETF describing it in more detail.
The *tl;dr*: Send the DNS protocol in an HTTP POST request or base64-encoded in a GET request,
get back the DNS protocol in the response body and parse it.
Given how simple that sounds, I decided to implement a minimal DOH client in Rust.