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Setting Content Length on GZip Requests #9

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Setting Content Length on GZip Requests #9

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Setting Content Length on GZip Requests
gja Oct 28, 2016
1772449
Removing uneccesary thread
gja Oct 30, 2016
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31 changes: 24 additions & 7 deletions src/ring/middleware/gzip.clj
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,8 @@
(:import (java.util.zip GZIPOutputStream)
(java.io InputStream
OutputStream
ByteArrayOutputStream
ByteArrayInputStream
Closeable
File
PipedInputStream
Expand Down Expand Up @@ -52,13 +54,28 @@
(.close ^Closeable in)))
pipe-in))

(defn gzipped-response [resp]
(-> resp
(update-in [:headers]
#(-> %
(assoc "Content-Encoding" "gzip")
(dissoc "Content-Length")))
(update-in [:body] piped-gzipped-input-stream)))
(defn- gzip-into-byte-array? [resp]
(if-let [length (get-in resp [:headers "Content-Length"])]
(< (Long/parseLong length) 1048576)))

(defn gzipped-response [{:keys [body] :as resp}]
(let [gzip-body (piped-gzipped-input-stream body)]
(if (gzip-into-byte-array? resp)
(let [output-stream (ByteArrayOutputStream.)
_ (io/copy gzip-body output-stream)
gzip-bytes (.toByteArray output-stream)]
(-> resp
(update-in [:headers]
#(-> %
(assoc "Content-Encoding" "gzip")
(assoc "Content-Length" (str (count gzip-bytes)))))
(assoc :body (ByteArrayInputStream. gzip-bytes))))
(-> resp
(update-in [:headers]
#(-> %
(assoc "Content-Encoding" "gzip")
(dissoc "Content-Length")))
(assoc :body gzip-body)))))

(defn wrap-gzip [handler]
(fn [req]
Expand Down