base64 encoding occurs for application/javascript

[jcouser]

I'm not sure if/how I'm getting this behavior but unless I've added this mime type (application/javascript) here:
https://github.com/logandk/serverless-wsgi/blob/master/wsgi.py#L16

All of my javascript files loading in are base64 encoded and break rendering. I've adding this mime type and everything is fixed. This seems like a bug unless I'm overlooking something in configuration.

[logandk]

That does seem odd. Even though application/javascript is indeed not on the list of text mime-types, it should not end up being base64 encoded in the response. The WSGI handler base64 encodes the payload and sets the isBase64Encoded, instructing API Gateway to decode the payload, thus sending the original javascript to the client.

I'm fine with adding the mime-type, but I'd like to see a simple reproduction case in order to find the actual root cause. Could you help out by providing a simple configuration that reproduces the error? Thanks!

As a side note, serving assets should ideally happen through S3/CloudFront rather than the Lambda function itself

[jcouser]

Appreciate the feedback, sorry for the delayed response, was just working on this over the weekend and have been busy.

I've started with this as a base for a simple flask based serverless application which works fine. I've then replaced the requirements.txt, app.py and serverless.yml to support flask-restplus which is a REST framework for flask that provides swagger-ui built in, so these js files are built within this package:

http://flask-restplus.readthedocs.io/en/stable/

I've attached a zip that contains the requirements, app.py to support flask-restplus, as well as the updated serverless.yml.
sls flask-restplus.zip

Let me know if this helps, or if I can provide anything further from the project.

[logandk]

Don't worry, I haven't had time to look into this yet myself. Thanks for the attached files, I'll try to reproduce it.

[logandk]

After testing this, as far as I can tell, there is some special handling of application/javascript going on in API Gateway. The other assets are passed along fine as base64 encoded, but the JS files doesn't get decoded. I've added the mimetype, which makes sense either way.