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README.org

http.async.client - Asynchronous HTTP Client - Clojure

http.async.client is the Asynchronous HTTP Client for Clojure. It is promise-based and uses the Asynchronous Http Client for Java for the heavy lifting.

Versioning

This library uses semantic versioning. An overview of changes by version is available in the changelog.

Distribution

All released artifacts are deployed to Clojars.

http://clojars.org/http.async.client/latest-version.svg

Build status

TravisCI is used to track the build status of intermediate commits on the following branches:

masterhttps://secure.travis-ci.org/cch1/http.async.client.png?branch=master
developmenthttps://secure.travis-ci.org/cch1/http.async.client.png?branch=development

Examples

Declare dependency (using leiningen, in this example):

(defproject your-project "1.0.0-SNAPSHOT"
  :description "Your project description"
  :dependencies [[org.clojure/clojure "1.10.0"]
                 [http.async.client "1.3.1"]])

Asynchronous GET request

(ns async-get
  (:require [http.async.client :as http]))

(with-open [client (http/create-client)]
  (let [response (http/GET client "https://github.com/cch1/http.async.client/")]
    (-> response
        http/await
        http/string)))

WebSocket client

(ns ws-client
  (:require [http.async.client :as http]))

(def url "ws://remote-websocket-url:1337")

(defn on-open [ws]
  (println "Connected to WebSocket."))

(defn on-close [ws code reason]
  (println "Connection to WebSocket closed.\n"
           (format "[%s] %s" code reason)))

(defn on-error [ws e]
  (println "ERROR:" e))

(defn handle-message [ws msg]
  (prn "got message:" msg))

(defn -main []
  (println "Connecting...")
  (with-open [client (http/create-client)]
    (let [ws (http/websocket client
                             url
                             :open  on-open
                             :close on-close
                             :error on-error
                             :text handle-message)]
      ; this loop-recur is here as a placeholder to keep the process
      ; from ending, so that the message-handling function will continue to
      ; print messages to STDOUT until Ctrl-C is pressed
      (loop [] (recur)))))

More info

It runs with Clojure 1.5.1, 1.6.0, 1.7.0, 1.8.0, 1.9.0 and 1.10.0. Development is against Clojure 1.9.0.

For complete documentation refer to the project documentation index.

http.async.client is distributed under Apache License, Version 2.0.

If you would like to report an problem or submit a request, create an issue.

Finally, much thanks is owed to those contributors who have made this project so successful.

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