A Clojure HTTP library wrapping the Apache HttpComponents client.
The main HTTP client functionality is provided by the clj-http.client namespace:
(require '[clj-http.client :as client])
The client supports simple get, head, put, post, and delete requests. Responses are returned as Ring-style response maps:
(client/get "http://google.com")
=> {:status 200
:headers {"date" "Sun, 01 Aug 2010 07:03:49 GMT"
"cache-control" "private, max-age=0"
"content-type" "text/html; charset=ISO-8859-1"
...}
:body "<!doctype html>..."}
More example requests:
(client/get "http://site.com/resources/id")
(client/get "http://site.com/resources/3" {:accept :json})
(client/post "http://site.com/resources" {:body byte-array})
(client/post "http://site.com/resources" {:body "string"})
(client/get "http://site.com/protected" {:basic-auth ["user" "pass"]})
(client/get "http://site.com/search" {:query-params {"q" "foo, bar"}})
(client/get "http://site.com/favicon.ico" {:as :byte-array})
(client/post "http://site.com/api"
{:basic-auth ["user" "pass"]
:body "{\"json\": \"input\"}"
:headers {"X-Api-Version" "2"}
:content-type :json
:accept :json})
A more general response function is also available, which is useful as a primitive for building higher-level interfaces:
(defn api-action [method path & [opts]]
(client/request
(merge {:method method :url (str "http://site.com/" path)} opts)))
The client will throw exceptions on, well, exceptional status codes:
(client/get "http://site.com/broken")
=> Exception: 500
The client will also follow redirects on the appropriate 30* status codes.
The client transparently accepts and decompresses the gzip and deflate content encodings.
clj-http is available as a Maven artifact from Clojars:
:dependencies
[[clj-http "0.1.2"] ...]
The design of clj-http is inspired by the Ring protocol for Clojure HTTP server applications.
The client in clj-http.core makes HTTP requests according to a given Ring request map and returns Ring response maps corresponding to the resulting HTTP response. The function clj-http.client/request uses Ring-style middleware to layer functionality over the core HTTP request/response implementation. Methods like clj-http.client/get are sugar over this clj-http.client/request function.
To run the tests:
$ lein deps
$ lein run -m clj-http.run-server
$ lein test
Released under the MIT License: http://www.opensource.org/licenses/mit-license.php