Writing CSV file in Clojure with writer

Question

I need to return from the server a CSV file.

I have the data which is a simple map, I DO NOT want to create a file on the disk, I saw that the write-csv function can accept as argument a writer.

Something like that (but it doesnt work):

(csv/write-csv (java.io.BufferedWriter. (java.io.OutputStream.  )) csv-data)

The error:

:cause java.io.OutputStream
 :via
 [{:type java.lang.InstantiationError
   :message java.io.OutputStream

Answer 1

If you just want a string, you could use with-out-str:

(with-out-str
  (csv/write-csv *out* csv-data))