Clojure Q&A - Recent questions tagged http

Consider including a built-in wrapper around `java.net.http.HttpClient` in future versions of Clojure

Mon, 08 Jun 2026 01:37:14 +0000

Java 9 introduced java.net.http.HttpClient[1] with support for HTTP/1.1, HTTP/2 as well as WebSocket along with other features. It was later standardized in Java 11[2] and has become one of the top picks for Java programs. The latest version of the HTTP client shipped with Java 26 also added support for HTTP/3.[3]

It would be nice for future versions of Clojure that are based on Java 11+ to include a new namespace with wrapper functions around java.net.http.HttpClient to make it easier (without all the OOP ceremonies) to work with HTTP in Clojure programs out of the box without relying on any 3rd-party libraries.

Examples of prior art:

[1] https://openjdk.org/jeps/110
[2] https://openjdk.org/jeps/321
[3] https://openjdk.org/jeps/517

how to start a web server in dev mode in an interactive mode with hot reload and refresh

Fri, 12 May 2023 08:20:46 +0000

Hello wonderful clojure community.
I am new to clojure so appologies for my dump question.

I want to write a http server in clojure and for that there a a few libraries/frameworks available. but what is important for me is the interactive development experience, how?

ok, I want to start the server and if I change a module/namespace I want it to be automatically reload (actually I've already achieved this) however on top of it I want the frontend to get refreshed automatically to to refelect the changes. I use hiccup to describe/render my html pages, unfortunately though for any change I need to manually refresh the page.

I know there should be a (websocket based) solution to make this possible.

I want this soution to work with clojure, I do not use/want clojurescrip.

Reading a JSON stream over HTTP, indefinitely?

Sat, 29 Feb 2020 07:59:50 +0000

I am trying to read a json HTTP stream and use the json elements, indefinitely.

I came up with this code below, but it does close the stream and only returns 30 results - how do I indefinitely use the HTTP stream?

Thanks for your help!

(ns core
  (:require [clj-http.client :as http]
            [cheshire.core :as json]
            [clojure.java.io :as io]
            [clojure.core.async :as async]))

(def gh-url "https://api.github.com/events")
(def chan (async/chan 100))

(async/go
  (loop [r (async/<! chan)]
    (when (not-empty r) (println (:type r)))
    (recur (async/<! chan))))

(defn read-gh-stream [url]
  (with-open [stream (-> url (http/get {:as :stream}) :body)]
    (let [lines (-> stream io/reader (json/parse-stream true))]
      (doseq [l lines]
        (async/go
          (async/>! chan l))))))

How to do a HTTP request over a unix socket in Clojure

Sat, 04 Jan 2020 15:08:16 +0000

I want to a HTTP request over a UNIX socket, like the following example using curl and docker:

$ curl --unix-socket /var/run/docker.sock http://localhost/images/json
[
  {
    "Containers": -1,
    "Created": 1577395270,
    "Id": "sha256:ce6c1e7ac56533e2742030f033cf0d8cf0adc996c7bb87453eb5adc266b2ef2e",
    "Labels": null,
    "ParentId": "",
    "RepoDigests": [
      "busybox@sha256:7fe0cb3632d9ea7b2a9ab4427e339e01f7cdfeff50674804cb8946664976c610"
    ],
    "RepoTags": [
      "busybox:musl"
    ],
    "SharedSize": -1,
    "Size": 1461385,
    "VirtualSize": 1461385
  }
]

As far as I've seen, clj-http doesn't seem to support this.

What would be a recommended/idiomatic way of doing this in Clojure?