Architectural Vision

This chapter specifies the underlying requirements and motivations for CoAPy.

• The implementation should be suitable as a reference implementation, supporting exactly the specification as detailed in the to-be RFC.
• The architecture should be highly abstracted so as to decouple key concepts such as messages and requests/responses.
• A well-defined and complete logging infrastructure should support tracing all protocol operations, including timestamps.
• All protocol-defined configuration constants (such as congestion controls) should be mutable within the ranges allowed.
• The implementation should be extensible to handle new options and behaviors that are described in additional specifications such as block and observe.
• The target environment is Python 2.6 and higher including Python 3. The implementation may require may require Python 3 features that were not originally available in Python 2, as long as they are present in Python 2.6.8 and Python 2.7.5. Supporting infrastructure such as unit tests may additionally use any Python 3 features available in Python 2.7.3.