def addToMessage(self, message):
message.update({
fc('resource_link'): {
'id': self.id,
'title': self.label
},
fc('custom'): self.params
})
return message
def addToMessage(self, message):
message.update({fc('context'): self.context})
return message
def addToMessage(self, msg):
updated = self.user.addToMessage(msg)
updated.update({
fc('roles'): [self.role]
})
return updated
def addToMessage(self, msg):
updated = copy(msg)
updated[fc('tool_platform')] = {'name': self.name, 'guid': self.guid}
return updated
def message(self,
messageType,
course,
member,
message,
return_url,
request_url=None,
resource_link=None,
nonce=None):
key = keys[randrange(0, len(keys))]
privatekey = key[1].exportKey()
now = int(time())
root_url = request_url.rstrip(
'/') if request_url else self.platform.url
if nonce:
message['nonce'] = nonce
message.update({
'iat': now,
'exp': now + 60 * 10,
'nonce': nonce,
'iss': root_url,
'aud': self.client_id,
fc('deployment_id'): self.deployment_id,
fc('message_type'): messageType,
fc('version'): '1.3.0',
fc('launch_presentation'): {
"document_target": "iframe",
"return_url": root_url + return_url
}
})
ags_claim = {
'scope': [
scope('lineitem', s='ags'),
scope('score', s='ags'),
scope('result.readonly', s='ags')
],
'lineitems':
'{0}/{1}/lineitems'.format(root_url, course.id)
}
memberships_claim = {
'context_memberships_url':
'{0}/{1}/memberships'.format(root_url, course.id)
}
message = member.addToMessage(message)
message = course.addToMessage(message)
if resource_link:
message = resource_link.addToMessage(message)
if resource_link.lineitem:
ags_claim[
'lineitem'] = '{0}/{1}/lineitems/{2}/lineitem'.format(
root_url, course.id, resource_link.lineitem.id)
if fc('custom') in message:
custom = message[fc('custom')]
resolvers = [course, member]
if resource_link:
resolvers.append(resource_link)
def resolve(item):
value = item[1]
for resolver in resolvers:
if len(value) == 0 or value[0] != '$':
break
value = resolver.resolve_param(value, member=member)
return (item[0], value)
message[fc('custom')] = dict(map(resolve, custom.items()))
message[fc('endpoint', s='ags')] = ags_claim
message[fc('namesroleservice', s='nrps')] = memberships_claim
lti11_key = 'e2573-371879'
lti11_key_sign = hmac_sha256_signature(
'lti11-secret', '&'.join(
(lti11_key, self.deployment_id, root_url, self.client_id,
str(message['exp']), nonce)))
message[fc('lti1p1')] = {
'oauth_consumer_key': lti11_key,
'oauth_consumer_key_sign': lti11_key_sign
}
message = self.platform.addToMessage(message)
return jwt.encode(message,
privatekey,
algorithm='RS256',
headers={'kid': key[0]})
