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;;; http/connection.clj: low-level HTTP client API around HttpURLConnection
;; by Stuart Sierra, http://stuartsierra.com/
;; June 8, 2009
;; Copyright (c) Stuart Sierra, 2009. All rights reserved. The use
;; and distribution terms for this software are covered by the Eclipse
;; Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
;; which can be found in the file epl-v10.html at the root of this
;; distribution. By using this software in any fashion, you are
;; agreeing to be bound by the terms of this license. You must not
;; remove this notice, or any other, from this software.
(ns #^{:doc "Low-level HTTP client API around HttpURLConnection"}
clojure.contrib.http.connection
(:require [clojure.contrib.duck-streams :as duck]
[clojure.contrib.java-utils :as j])
(:import (java.net URI URL HttpURLConnection)
(java.io File InputStream Reader)))
(defn http-connection
"Opens an HttpURLConnection at the URL, handled by as-url."
[url]
(.openConnection (j/as-url url)))
(defmulti
#^{:doc "Transmits a request entity body."}
send-request-entity (fn [conn entity] (type entity)))
(defmethod send-request-entity duck/*byte-array-type* [#^HttpURLConnection conn entity]
(.setFixedLengthStreamingMode conn (count entity))
(.connect conn)
(duck/copy entity (.getOutputStream conn)))
(defmethod send-request-entity String [conn #^String entity]
(send-request-entity conn (.getBytes entity duck/*default-encoding*)))
(defmethod send-request-entity File [#^HttpURLConnection conn #^File entity]
(.setFixedLengthStreamingMode conn (.length entity))
(.connect conn)
(duck/copy entity (.getOutputStream conn)))
(defmethod send-request-entity InputStream [#^HttpURLConnection conn entity]
(.setChunkedStreamingMode conn -1)
(.connect conn)
(duck/copy entity (.getOutputStream conn)))
(defmethod send-request-entity Reader [#^HttpURLConnection conn entity]
(.setChunkedStreamingMode conn -1)
(.connect conn)
(duck/copy entity (.getOutputStream conn)))
(defn start-http-connection
([#^HttpURLConnection conn] (.connect conn))
([#^HttpURLConnection conn request-entity-body]
(if request-entity-body
(do (.setDoOutput conn true)
(send-request-entity conn request-entity-body))
(.connect conn))))
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