rest - How download file using java spark? -

i want write simple rest api file download.

i cant find docs understood need set mimetype='application/zip' response, not clear how return stream.

http://sparkjava.com/

update: resolved here example code:

public static void main(string[] args) {     //setport(8080);     get("/hello", (request, responce) -> getfile(request,responce)); }  private static object getfile(request request, response responce) {     file file = new file("myfile");     responce.raw().setcontenttype("application/octet-stream");     responce.raw().setheader("content-disposition","attachment; filename="+file.getname()+".zip");     try {          try(zipoutputstream zipoutputstream = new zipoutputstream(new bufferedoutputstream(responce.raw().getoutputstream()));         bufferedinputstream bufferedinputstream = new bufferedinputstream(new fileinputstream(file)))         {             zipentry zipentry = new zipentry(file.getname());              zipoutputstream.putnextentry(zipentry);             byte[] buffer = new byte[1024];             int len;             while ((len = bufferedinputstream.read(buffer)) > 0) {                 zipoutputstream.write(buffer,0,len);             }         }     } catch (exception e) {         halt(405,"server error");     }      return null; 

what need similar this thread. need close outputstream , return raw httpservletresponse:

try {     ...     zipoutputstream.flush();     zipoutputstream.close(); } catch (exception e) {     halt(405,"server error"); } return responce.raw();