Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Using the library suggested by @mdoering, this parses IDNs at the cost of a 10MB ICU4J library. There seems to be no alternative to this, see smola/galimatias#57.
The library claims (smola/galimatias#23) to parse URLs like http://dep_bio.pnzgu.ru/Gerbariy_im_I_I_Sprygina (which meets the WHATWG spec but doesn't meet the RFCs Java follows due to the underscore), but it doesn't. A pull request to the library is probably the best idea.
For issue #19.