Avoid buffering - next ISeq chunk may be delayed

The ISeq elements may be delayed at source, thus causing an
unnecessary wait at the client end for the output. We flush
the writer after writing out every ISeq element. This makes
implementing Server-sent Events smooth as well.

Author: kumarshantanu

ring-core-protocols/src/ring/core/protocols.clj

@@ -55,7 +55,8 @@
   (write-body-to-stream [body response output-stream]
     (with-open [writer (response-writer response output-stream)]
       (doseq [chunk body]
-        (.write writer (str chunk)))))
+        (.write writer (str chunk))
+        (.flush writer))))
   java.io.InputStream
   (write-body-to-stream [body _ ^OutputStream output-stream]
     (with-open [body body]