Set X-Duration-Seconds header on timeout

[ewilde]

Set X-Duration-Seconds header when original function call exceeds
timeout.

Fixes #77

Signed-off-by: Edward Wilde ewilde@gmail.com

Description

Motivation and Context

• I have raised an issue to propose this change (required)

How Has This Been Tested?

Tested on Mac OS with docker swarm

1. Created function a with that sleeps longer than timeout
2. Created callback function that prints X-Duration-Seconds header

Before change

Logs from callback function

2019/12/09 02:56:41 stderr: 2019/12/09 02:56:41 Status:[502], time:[], body:

After change

Logs from callback function

2019/12/09 03:23:20 Status:[502], time:[10.024013], body:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have signed-off my commits with git commit -s
• I have added tests to cover my changes.
• All new and existing tests passed.

[alexellis]

Approved

[alexellis]

Thanks

FYI https://github.com/openfaas/nats-queue-worker/releases/tag/0.9.0