AWS Lambda、Python 无服务器处理程序与 url 模式/参数

Question

I am trying to set up a lambda function using Python and serverless. I was able to perform simple POST/GET requests and have them to proxy to my lambda function just fine.

Now I am struggling getting something like this to work with serverless:

GET /my_function/{foo}

In a way that I could get it by:

http://....aws.../my_function/bar

This is what I'm trying:

serverless.yml

functions:
  my_function:
    handler: handler.my_function
    events:
      - http: GET /my_function/{foo}

It deployed to aws, but I am not able to get the value. It says there is no key for the event:

handler.py:

def sitemap_entries(event, context):
  s = MyNiceClass(event['foo'])
  ...

What am I missing?

PS: It works on local invoke when I send --data '{"foo": "bar"}'

Thank you

Answer 1

If you use the Lambda Proxy Integration (which is the default setting so unless you've changed it you'll be using it) then the path parameters are inside event in an attribute called pathParameters , so to access them use:

event.get('pathParameters', {}).get('foo', None)