Serving dynamically generated images?

[blackwre]

Assuming that I have a clojure function that generates Images (pie
charts, diagrams etc) dynamically via BufferedImage, is there a way to
serve these image files as PNG via a route in compojure without having
to save them to disk and then serve-file them?

Sorry if this is a naive newbie question, any pointers to libraries or
sample code gratefully accepted - thanks.

[Alen Ribic]

Hope this example helps:

https://gist.github.com/01e4022f6fde08fc5f4b

-Alen

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[blackwre]

Thanks very much!

Distilling that down gives the following handler which works perfectly
with my BufferedImage

(defn serve-image [request image]
(let [out-stream (java.io.ByteArrayOutputStream.)
in-stream (do
(javax.imageio.ImageIO/write image "png" out-stream)
(java.io.ByteArrayInputStream.
(.toByteArray out-stream)))
header {:status 200
:headers {"Content-Type" "image/png"}}]
(update-response request
header
in-stream)))