fix(web): issue2551356. Add etag header for not-modified (304) request. When a 304 is returned to a conditional request for a static file, print an ETag for the response. ETag was always sent with a 200 response. This also adds initial support for if-none-match conditional requests for static files. Changes: Refactors the if-modified-since code out to a method. It moves a file stat call from serve_static_file to _serve_file so that an etag can be generated by both serve_static_file and serve_file which call _serve_file. Tests added. This does not test the codepath where serve_file pulls content from the database rather than from a local file on disk. Test mocking _serve_file changed to account for 5th argument to serve_file BREAKING CHANGE: function signature for client.py-Client::_serve_file() now has 5 not 4 parameters (added etag param). Since this is a "hidden" method I am not too worried about it.

#-*- encoding: utf-8 -*-
import unittest

from roundup import mailer

class EncodingTestCase(unittest.TestCase):
    def testEncoding(self):
        a = lambda n, a, c, o: self.assertEqual(mailer.nice_sender_header(n,
            a, c), o)
        a('ascii', 'ascii@test.com', 'iso8859-1', 'ascii <ascii@test.com>')
        a(u'café', 'ascii@test.com', 'iso8859-1',
            '=?iso8859-1?q?caf=E9?= <ascii@test.com>')
        a(u'café', 'ascii@test.com', 'utf-8',
            '=?utf-8?b?Y2Fmw6k=?= <ascii@test.com>')
        a('as"ii', 'ascii@test.com', 'iso8859-1', '"as\\"ii" <ascii@test.com>')

# vim: set et sts=4 sw=4 :