🔧 Avoid blocking when reading data from request stream

[GQMai]

The following call can block under certain WSGI servers which implements only PEP 333 not PEP 3333
request.stream.read()
It can be avoided by changing it to
request.stream.read(request.content_length or 0)

Reference:
https://falcon.readthedocs.io/en/stable/api/request_and_response.html
https://stackoverflow.com/questions/22894078/why-does-environwsgi-input-read-block-even-though-it-is-allowed-by-pep-333?answertab=oldest#tab-top

[madchutney]

@GQMai Thanks for the fix. Can you please add a news file for the release notes, e.g. docs/news/20190829.doc and mention this is a fix to an example, thanks.

Please note that this example should never be used for production environments.

[GQMai]

@GQMai Thanks for the fix. Can you please add a news file for the release notes, e.g. docs/news/20190829.doc and mention this is a fix to an example, thanks.

Please note that this example should never be used for production environments.

Sure. It's done.
Thanks.