CE context headers in Python 3.7 runtime

[tzununbekov]

• Lambda-Runtime-Cloudevents-Context header added to the task API to provide additional context,
• Since function's context is the root object for AWS Lambda function metadata, Cloudevents context is stored under the dedicated map ce, and can be accessed as shown below:

  def foo(event, context):
    print("CE Type is " + context.ce['type'])
  

More runtimes support is coming.

Related to triggermesh/function#13
Depends on triggermesh/aws-custom-runtime#32

[antoineco]

Is the capital letter expected in your example? If that's the case, we should fix it because a CE attributes can only be [a-z0-9], any other character is invalid and causes CE receivers to drop events as invalid.

[tzununbekov]

Is the capital letter expected in your example? If that's the case, we should fix it because a CE attributes can only be [a-z0-9], any other character is invalid and causes CE receivers to drop events as invalid.

Let me check that because one of the layers between the client and the function converts all these headers to Ce-Type format.

UPD: fixed in triggermesh/aws-custom-runtime@58d9e40#diff-d87d46428a3537e6c7b240e87dff7f0dcf65d349c847622556d0b4f695f579eeR146