librarian sends tar.gz file with wrong Content-Type headers: text/html

[Stephen A. Goss]

This URL: http://launchpad.net/flufl.bounce/trunk/0.91/+download/flufl.bounce-0.91.tar.gz 303's to this URL: http://launchpadlibrarian.net/75313819/flufl.bounce-0.91.tar.gz which delivers the file, but with a Content-Type header of "text/html" which is wrong. Attempting to build mailman 3.0 fails when retrieving this file:

  Getting distribution for 'flufl.bounce'.
Error: Unexpected HTML page found at http://launchpad.net/flufl.bounce/trunk/0.91/+download/flufl.bounce-0.91.tar.gz

It's failing because the headers are wrong and is assuming that the webserver is responding by sending HTML instead of binary data. This is easy to verify with curl:

$ curl http://launchpadlibrarian.net/75313819/flufl.bounce-0.91.tar.gz -I
HTTP/1.1 200 OK
Date: Fri, 22 Jul 2011 18:18:15 GMT
Server: TwistedWeb/11.0.0
Content-Length: 148276
Accept-Ranges: bytes
Last-Modified: Fri, 15 Jul 2011 22:17:10 GMT
Cache-Control: max-age=31536000, public
Content-Type: text/html
Age: 566
X-Cache: HIT from banana.canonical.com
X-Cache-Lookup: HIT from banana.canonical.com:3128
Via: 1.0 banana.canonical.com:3128 (squid/2.7.STABLE7)
Via: 1.1 launchpadlibrarian.net
Vary: Accept-Encoding