Create checksum on cache package and make registry with check summa

[vit1251]

• Pip version: 9.0.1
• Python version: 2.7
• Operating System: GNU/Debian

Description:

Cache directory contain partial download package. PIP will check checksum of package and re-download to make sure that loading complete with success.

What I've run:

Try make command:

pip install -U pip

and receive follow traceback:

Collecting pip
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/commands/install.py", line 335, in run
    wb.build(autobuilding=True)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/wheel.py", line 749, in build
    self.requirement_set.prepare_files(self.finder)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/req/req_set.py", line 554, in _prepare_file
    require_hashes
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 278, in populate_link
    self.link = finder.find_requirement(self, upgrade)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/index.py", line 465, in find_requirement
    all_candidates = self.find_all_candidates(req.name)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/index.py", line 423, in find_all_candidates
    for page in self._get_pages(url_locations, project_name):
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/index.py", line 568, in _get_pages
    page = self._get_page(location)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/index.py", line 683, in _get_page
    return HTMLPage.get_page(link, session=self.session)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/index.py", line 792, in get_page
    "Cache-Control": "max-age=600",
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/_vendor/requests/sessions.py", line 488, in get
    return self.request('GET', url, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/download.py", line 386, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/_vendor/requests/sessions.py", line 475, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/_vendor/requests/sessions.py", line 596, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/_vendor/cachecontrol/adapter.py", line 37, in send
    cached_response = self.controller.cached_request(request)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/_vendor/cachecontrol/controller.py", line 111, in cached_request
    resp = self.serializer.loads(request, cache_data)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/_vendor/cachecontrol/serialize.py", line 114, in loads
    return getattr(self, "_loads_v{0}".format(ver))(request, data)
  File "/usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg/pip/_vendor/cachecontrol/serialize.py", line 176, in _loads_v2
    cached = json.loads(zlib.decompress(data).decode("utf8"))
error: Error -5 while decompressing data: incomplete or truncated stream

[xavfernandez]

Fixed in cachecontrol>=0.12 via psf/cachecontrol@0c7eae5 included in pip via #4342