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Bradley M. Kuhn

Continuing saga of the sizing chart problems for original shirts

Gildan removed the sizing chart entirely from their website again
after yet another redesign. Originally, we deep-linked into files in
their CDN for the charts, but it appears that in 5c72071 that I
introduced cut-and-paste error on the sizing charts. I cannot find
the original links, but finally I simply decided we'd mirror the
files in our CDN, which is where these now link to.

I suspect that I didn't do this to start for worrying about copyright
infringement, but upon second thought, I think it's very reasonably
fair use for us to distribute these images. We bought a lot of
t-shirts from Gildan and just trying to sell through.

from builtins import object
import hashlib

from django.conf import settings
from django.template import RequestContext

# This is backwards compatibilty support for a custom function we wrote
# ourselves that is no longer necessary in modern Django.
from django.shortcuts import render as render_template_with_context

class ParameterValidator(object):
    def __init__(self, given_hash_or_params, params_hash_key=None):
        if params_hash_key is None:
            self.given_hash = given_hash_or_params
        else:
            self.given_hash = given_hash_or_params.get(params_hash_key)
        seed = getattr(settings, 'CONSERVANCY_SECRET_KEY', '').encode('utf-8')
        self.hasher = hashlib.sha256(seed)
        if isinstance(self.given_hash, basestring):
            self.hash_type = type(self.given_hash)
        else:
            self.hash_type = type(self.hasher.hexdigest())
        self.valid = None
        if not (self.given_hash and seed):
            self.fail()

    def __enter__(self):
        self.valid = self.valid and None
        return self

    def __exit__(self, exc_type, exc_value, exc_tb):
        if exc_type is None:
            self.check()
        else:
            self.fail()

    def validate(self, data):
        self.valid = self.valid and None
        self.hasher.update(data)

    def check(self):
        if self.valid or (self.valid is None):
            self.valid = self.hash_type(self.hasher.hexdigest()) == self.given_hash
        return self.valid

    def fail(self):
        self.valid = False

Location: website/www/conservancy/__init__.py

Location: website/www/conservancy/init.py