pylti.common package¶

Common classes and methods for PyLTI module

exception pylti.common.LTIException¶: Custom LTI exception for proper handling of LTI specific errors

exception pylti.common.LTINotInSessionException¶: Custom LTI exception for proper handling of LTI specific errors

class pylti.common.LTIOAuthDataStore(consumers)¶

Largely taken from reference implementation for app engine at https://code.google.com/p/ims-dev/

lookup_nonce(oauth_consumer, oauth_token, nonce)¶: Lookup nonce should check if nonce was already used by this consumer in the past. Reusing nonce is bad: http://cwe.mitre.org/data/definitions/323.html Not implemented.

exception pylti.common.LTIPostMessageException¶: Exception class for when LTI user doesn’t have the right role.

exception pylti.common.LTIRoleException¶: Exception class for when LTI user doesn’t have the right role.

pylti.common.generate_request_xml(message_identifier_id, operation, lis_result_sourcedid, score)¶

Generates LTI 1.1 XML for posting result to LTI consumer.

Parameters:	message_identifier_id – operation – lis_result_sourcedid – score –
Returns:	XML string

pylti.common.post_message(consumers, lti_key, url, body)¶

Posts a signed message to LTI consumer

Parameters:	consumers – consumers from config lti_key – key to find appropriate consumer url – post url body – xml body
Returns:	success

pylti.common.post_message2(consumers, lti_key, url, body, method='POST', content_type='application/xml')¶

Posts a signed message to LTI consumer using LTI 2.0 format

Param:	consumers: consumers from config
Param:	lti_key: key to find appropriate consumer
Param:	url: post url
Param:	body: xml body
Returns:	success

pylti.common.verify_request_common(consumers, url, method, headers, params)¶

Verifies that request is valid

Parameters:	consumers – consumers from config file url – request url method – request method headers – request headers params – request params
Returns:	is request valid