Partial IRI (RFC 3987) support

(note #2409)

(In [14305]) Branching to 'partial-IRI-support-2408'

This should be enough to make blendix.com work for Unicode names.

The SharingIndex.locateChild change is not currently backed by a test, but:

• The impact of this change is limited to making it consistent with the existing behavior of its parent, UserIndexPage.locateChild.
• I don't see a way to properly test this aspect of them that's not pretty involved; it's better covered by #2409.

The change doesn't seem hard, or involved, to test at all. Here's a simple example:

• Mantissa/xmantissa/test/test_websharing.py

  old	new
  391	391	self.assertIdentical(result, rend.NotFound)
  392	392
  393	393
  	394	def test_unicodeShareID(self):
  	395	"""
  	396	Verify that the shareID segment of the URL will be interpreted as
  	397	UTF-8.
  	398	"""
  	399	utf8ID = '\xc5\x9bhare\xc3\x8dD'
  	400	unicodeID = utf8ID.decode('utf-8')
  	401	sharingIndex = websharing.SharingIndex(self.userStore)
  	402	sharing.shareItem(self.shareable, shareID=unicodeID)
  	403	result, segments = sharingIndex.locateChild(None, (utf8ID,))
  	404	self.assertEquals(result.fragment.showMagicValue(),
  	405	self.magicValue)
  	406
  	407
  394	408	def test_emptySegmentWithDefault(self):
  395	409	"""
  396	410	Verify that we get the right resource and segments from

It doesn't look like the parent's locateChild encoding is tested anywhere either; that would be good to get into this branch.

(In partial-IRI-support-2408@14318)

The change doesn't seem hard, or involved, to test at all.

Indeed; i was thinking of the whole lookup chain, instead of the appropriate units. Thanks for pointing this out.

It doesn't look like the parent's locateChild encoding is tested anywhere either; that would be good to get into this branch.

Neither was its return result, really; i added some coverage.

Looking good. Merge away. Functional testing indicates that "李瑩" works as a name now, so I assume that yours will too :)

(In [14330]) Merge partial-IRI-support-2408

Author: pjd Reviewer: glyph Fixes #2408

This implements some support for RFC 3987 IRIs (or Unicode URIs) in:

• Nevow URL serialization
• Mantissa web-based sharing

Previously, the above just tracebacks.