Use json endpoint for pypi livecheck

[xeron (Ivan Larionov)]

Previously used XML page is not available for some packages (it redirects to JSON page).

[xeron (Ivan Larionov)]

Errors after with this change:

$ port livecheck `ls -1` > stdout.log
Error: cannot check if py-LabJackPython was updated (regex didn't match)
Error: cannot check if py-amqplib was updated (regex didn't match)
Error: cannot check if py-aniso8601 was updated (<url> malformed)
Error: cannot check if py-antlr3 was updated (The requested URL returned error: 404 Not Found)
Error: cannot check if py-aplpy was updated (Could not resolve host: pypi)
Error: cannot check if py-appscript was updated (Could not resolve host: pypi)
Error: cannot check if py-apsw was updated (regex didn't match)
Error: cannot check if py-apycot was updated (response reading failed)
Error: cannot check if py-argparse was updated (regex didn't match)
Error: cannot check if py-aspects was updated (regex didn't match)
Error: cannot check if py-astrolibcoords was updated (regex didn't match)
Error: cannot check if py-authkit was updated (The requested URL returned error: 404 Not Found)
Error: cannot check if py-baker was updated (Could not resolve host: pypi)
Error: cannot check if py-bitstring was updated (regex didn't match)
Error: cannot check if py-blessed was updated (Could not resolve host: pypi)
Error: cannot check if py-cdb was updated (The requested URL returned error: 403 Forbidden)
Error: livecheck failed for py-certifi: extracted version '2016.2.28' is older than livecheck.version '2016.02.28'
Error: cannot check if py-cherrypy was updated (The requested URL returned error: 403 Forbidden)
Error: cannot check if py-cherrypy3 was updated (The requested URL returned error: 404 Not Found)
Error: cannot check if py-chm2pdf was updated (regex didn't match)
Error: cannot check if py-clientform was updated (regex didn't match)
Error: cannot check if py-codetools was updated (The requested URL returned error: 404 NOT FOUND)
Error: cannot check if py-colormath was updated (Could not resolve host: pypi)
Error: livecheck failed for py-configparser: extracted version '3.5.0' is older than livecheck.version '3.5.0b2'
Error: cannot check if py-construct was updated (Could not resolve host: pypi)
Error: cannot check if py-control was updated (Could not resolve host: pypi)
Error: cannot check if py-couchdbkit was updated (Could not resolve host: pypi)
Error: cannot check if py-country was updated (The requested URL returned error: 404 Not Found)
Error: cannot check if py-creoleparser was updated (regex didn't match)
Error: cannot check if py-ctags was updated (The requested URL returned error: 404 Not Found)
Error: cannot check if py-cvxmod was updated (regex didn't match)
Error: cannot check if py-cx_Freeze was updated (regex didn't match)
Error: cannot check if py-daemon was updated (regex didn't match)
Error: cannot check if py-decoratortools was updated (Could not resolve host: pypi)
Error: cannot check if py-demjson was updated (regex didn't match)
Error: cannot check if py-django-debug-toolbar was updated (regex didn't match)
Error: cannot check if py-django-nose was updated (Could not resolve host: pypi)
Error: cannot check if py-djvubind was updated (regex didn't match)
Error: cannot check if py-dns was updated (regex didn't match)
Error: cannot check if py-dpkt was updated (regex didn't match)
Error: Port py-ebay not found

Verified half of these ports and it happens because they use their own livecheck (which we may mass-fix as well).

[xeron (Ivan Larionov)]

And attached stdout as a proof that it actually works :)

[xeron (Ivan Larionov)]

@raimue anything against applying this? Current XML endpoint is not reliable at all because it redirects to JSON endpoint for some ports.

[raimue (Rainer Müller)]

Not sure what I did differently in my initial testing in #51391, but it seems to work just fine.

Committed in r149160.

[xeron (Ivan Larionov)]

Thanks!