Added new method to index.py to fix an issue with chunked encoding an…

[ssullivan]

Fixes ISSUE #5

Description

Add a new method that changes some WSGI environ parameters to handle requests with chunked encoding.

Motivation and Context

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

How Has This Been Tested?

I deployed the template as a function and invoked it using a browser based RESTClient to test sending requests with different kinds of content for their bodies. Before this change when I performed the same tests the request bodies in the handle method were always empty.

Types of changes

• [x] 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:

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

[derek[bot]]

Thank you for your contribution. I've just checked and your commit doesn't appear to be signed-off. That's something we need before your Pull Request can be merged. Please see our contributing guide.

[ssullivan]

I believe this should be signed off now. I ran a git commit -amend -s to sign off but the bot didn’t re-run on the commit after pushing that change.

[alexellis]

Sign-off worked, thank you.