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license.py
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/
license.py
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from pylons import config
from pylons.i18n import _
import datetime
import urllib2
from ckan.lib.helpers import json
import re
class License(object):
"""Domain object for a license."""
def __init__(self, data):
self._data = data
for (key, value) in self._data.items():
if key == 'date_created':
# Parse ISO formatted datetime.
value = datetime.datetime(*map(int, re.split('[^\d]', value)))
self._data[key] = value
elif isinstance(value, str):
# Convert str to unicode (keeps Pylons and SQLAlchemy happy).
value = value.decode('utf8')
self._data[key] = value
def __getattr__(self, name):
return self._data[name]
def __getitem__(self, key):
return self._data[key]
def isopen(self):
return self.is_okd_compliant or self.is_osi_compliant
def as_dict(self):
data = self._data.copy()
if 'date_created' in data:
value = data['date_created']
value = value.isoformat()
data['date_created'] = value
return data
class LicenseRegister(object):
"""Dictionary-like interface to a group of licenses."""
def __init__(self):
group_url = config.get('licenses_group_url', None)
if group_url:
self.load_licenses(group_url)
else:
self.licenses = self.get_license_info
@property
def get_license_info(self):
# this allows the license info to be localised see #2575
default_license_list = [
{
"domain_content": False,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "notspecified",
"is_generic": True,
"is_okd_compliant": False,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": _("License Not Specified"),
"url": ""
},
{
"domain_content": False,
"domain_data": True,
"domain_software": False,
"family": "",
"id": "odc-pddl",
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "Open Data Commons Public Domain Dedication and Licence (PDDL)",
"url": "http://www.opendefinition.org/licenses/odc-pddl"
},
{
"domain_content": False,
"domain_data": True,
"domain_software": False,
"family": "",
"id": "odc-odbl",
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "Open Data Commons Open Database License (ODbL)",
"url": "http://www.opendefinition.org/licenses/odc-odbl"
},
{
"domain_content": False,
"domain_data": True,
"domain_software": False,
"family": "",
"id": "odc-by",
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "Open Data Commons Attribution License",
"url": "http://www.opendefinition.org/licenses/odc-by"
},
{
"domain_content": True,
"domain_data": True,
"domain_software": False,
"family": "",
"id": "cc-zero",
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "Creative Commons CCZero",
"url": "http://www.opendefinition.org/licenses/cc-zero"
},
{
"domain_content": True,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "cc-by",
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "Creative Commons Attribution",
"url": "http://www.opendefinition.org/licenses/cc-by"
},
{
"domain_content": True,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "cc-by-sa",
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "Creative Commons Attribution Share-Alike",
"url": "http://www.opendefinition.org/licenses/cc-by-sa"
},
{
"domain_content": True,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "gfdl",
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "GNU Free Documentation License",
"url": "http://www.opendefinition.org/licenses/gfdl"
},
{
"domain_content": True,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "other-open",
"is_generic": True,
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": _("Other (Open)"),
"url": ""
},
{
"domain_content": True,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "other-pd",
"is_generic": True,
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": _("Other (Public Domain)"),
"url": ""
},
{
"domain_content": True,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "other-at",
"is_generic": True,
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": _("Other (Attribution)"),
"url": ""
},
{
"domain_content": True,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "uk-ogl",
"is_okd_compliant": True,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "UK Open Government Licence (OGL)",
"url": "http://reference.data.gov.uk/id/open-government-licence"
},
{
"domain_content": False,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "cc-nc",
"is_okd_compliant": False,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": "Creative Commons Non-Commercial (Any)",
"url": "http://creativecommons.org/licenses/by-nc/2.0/"
},
{
"domain_content": False,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "other-nc",
"is_generic": True,
"is_okd_compliant": False,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": _("Other (Non-Commercial)"),
"url": ""
},
{
"domain_content": False,
"domain_data": False,
"domain_software": False,
"family": "",
"id": "other-closed",
"is_generic": True,
"is_okd_compliant": False,
"is_osi_compliant": False,
"maintainer": "",
"status": "active",
"title": _("Other (Not Open)"),
"url": ""
}
]
return [License(entity) for entity in default_license_list]
def load_licenses(self, license_url):
try:
response = urllib2.urlopen(license_url)
response_body = response.read()
except Exception, inst:
msg = "Couldn't connect to licenses service %r: %s" % (license_url, inst)
raise Exception, msg
try:
license_data = json.loads(response_body)
except Exception, inst:
msg = "Couldn't read response from licenses service %r: %s" % (response_body, inst)
raise Exception, inst
self._create_license_list(license_data)
def _create_license_list(self, license_data):
if isinstance(license_data, dict):
self.licenses = [License(entity) for entity in license_data.values()]
elif isinstance(license_data, list):
self.licenses = [License(entity) for entity in license_data]
else:
msg = "Licenses at %s must be dictionary or list" % license_url
raise ValueError(msg)
def __getitem__(self, key, default=Exception):
for license in self.licenses:
if key == license.id:
return license
if default != Exception:
return default
else:
raise KeyError, "License not found: %s" % key
def get(self, key, default=None):
return self.__getitem__(key, default=default)
def keys(self):
return [license.id for license in self.licenses]
def values(self):
return self.licenses
def items(self):
return [(license.id, license) for license in self.licenses]
def __iter__(self):
return iter(self.keys())
def __len__(self):
return len(self.licenses)