[wip] compute length of tar output for Content-Length

[ioistired]

running bin/dirserver -http 127.0.0.1:5000 -root . at the repo directory:

$ curl -s  http://dirserver.localhost:5000/src/dirserver/vendor/._tar/vendor.tar | wc -m
4965636

tar dbg: /src/dirserver/vendor 4964684 b0d631a26644098454369f090df91e019f63a3e5

they should both say 4965636.

[ioistired]

OK, tar Content-Length works fine, but zip Content-Length doesn't match yet:

➤ curl  'http://localhost:5000/Daft%20Punk/._zip/Daft%20Punk.zip'  >/dev/null
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
 99  887M   99  887M    0     0   408M      0  0:00:02  0:00:02 --:--:--  408M
curl: (18) transfer closed with 815 bytes remaining to read