Created
January 28, 2012 16:41
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async-clojure
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| (async | |
| (for [i (range 10 80)] | |
| (http-request | |
| {:method :get | |
| :url (format "http://fssnip.net/%d" i)})))) |
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| (def result (agent [])) | |
| (for [i (range 10 80)] | |
| (let [response | |
| (http-request | |
| {:method :get | |
| :url (format "http://fssnip.net/%d" i)})] | |
| (on-success | |
| response | |
| (fn[r] (send result #(conj % (:body r))))))) |
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| (defn fetch-url [adr] | |
| (let [url (java.net.URL. adr)] | |
| (with-open [stream (.openStream url)] | |
| (let [buf (java.io.BufferedReader. (java.io.InputStreamReader. stream))] | |
| (apply str (line-seq buf)))))) | |
| (future (fetch-url "http://www.google.co.uk/")) |
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| let download url = async { | |
| let request = HttpWebRequest.Create(Uri(url)) | |
| let! response = request.AsyncGetResponse() | |
| use stream = response.GetResponseStream() | |
| let! res = asyncReadToEnd stream | |
| return res | |
| } |
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| (def ctr (atom 0)) | |
| (def result (agent [])) | |
| ; 3 get result | |
| (def response-handler | |
| (reify ChannelUpstreamHandler | |
| (handleUpstream [_ ctx evt] | |
| (do | |
| (swap! ctr inc) | |
| (when (instance? MessageEvent evt) | |
| (let [resp (.getMessage evt) | |
| cont (.getContent resp) | |
| heads (.getHeaders resp)] | |
| (send result #(conj % cont)))))))) | |
| ; 2 send request | |
| (defn connection-ok [uri] | |
| (let [host (.getHost uri)] | |
| (reify ChannelFutureListener | |
| (operationComplete [_ fut] | |
| (if (.isSuccess fut) | |
| (let [ch (.getChannel fut) | |
| pipe (.getPipeline ch) | |
| req (DefaultHttpRequest. | |
| (HttpVersion/HTTP_1_1) | |
| (HttpMethod/GET) | |
| (.toASCIIString uri))] | |
| (.setHeader req "Host" host) | |
| (.setHeader req "Connection" "close") | |
| (.addLast pipe "codec" (HttpClientCodec.)) | |
| (.addLast pipe "handler" response-handler) | |
| (.write ch req) | |
| nil)))))) | |
| ; 1 connect | |
| (def bootstrap | |
| (ClientBootstrap. | |
| (NioClientSocketChannelFactory. | |
| (Executors/newCachedThreadPool) | |
| (Executors/newCachedThreadPool)))) | |
| (for [i (range 10 80)] | |
| (let [name (format "http://fssnip.net/%d" i) | |
| uri (java.net.URI. name) | |
| port 80 | |
| host (.getHost uri) | |
| con-future (.connect bootstrap (java.net.InetSocketAddress. host port))] | |
| (.addListener | |
| con-future | |
| (connection-ok uri)))) |
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