[PROTON-1091] [Python binding] AMQP null type not sent on wire according to AMQP specification

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Cannot Reproduce
• Fix Version/s: proton-c-0.19.0
• Component/s: python-binding
• Assignee: Kim van der Riet
• Reporter: Kim van der Riet
• Created: 06/Jan/16 18:39
• Updated: 24/Dec/17 16:38
• Resolved: 04/Oct/17 18:18

Description

When sending AMQP type null as the content of a message, the Python binding sends the message with no body at all, and similarly interprets a no-body AMQP type message as a null type. This violates the AMQP 1.0 specification on two counts:

• A body MUST be present and be one of three types (section 3.2);
• When sending an AMQP null type, there is an assigned AMQP type code (0x40) which should be used.

This causes interoperability issues with other clients. For example, the C++ client can't send a null type to a python client without a failure (or visa versa).