Change session engine to use cache, simplify and improve LTI launch (#262)

tl-its-umich-edu / canvas-app-explorer

A Web application that presents a list of Canvas external (LTI) tools with details. When integrated within Canvas, the user can search for specific LTI tool(s), and add or remove those tools from Canvas courses.

Apache License 2.0

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Change session engine to use cache, simplify and improve LTI launch (#262) #270

Open ssciolla opened 2 years ago

ssciolla commented 2 years ago

This PR aims to resolve #262 (which may need to be modified or expanded). The PR is still a draft.

[x] Removed DummyCache, as this isn't recommended for production use.
[x] Created error message extraction pattern for Exceptions.
[x] Added LTIException error handling.
[x] Changed session engine to the cache to try to resolve Invalid nonce error.