GitHub user mars opened an issue:
https://github.com/apache/incubator-predictionio/issues/266
Make TLS/https optional
As mentioned in the post-close comments of [this TLS error
issue](https://github.com/apache/incubator-predictionio/issues/221#issuecomment-217486391),
providing optional plain HTTP would allow `pio deploy` to be supported on
proxied/routed app platforms like [Heroku](https://www.heroku.com).
I've been working on a [PIO buildpack for
Heroku](https://github.com/mars/prediction.io-buildpack) using the current
PredictionIO-0.9.6 release. Once the engine deploys & starts successfully, the
Heroku router cannot negotiate a HTTP connection with the PIO engine.
Plain HTTP would also allow generic authentication proxies for the
wide-open service provided by `pio deploy`.
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