Adds receipt validation endpoint

[flovilmart]

Proposed fix for #134

Exposes /validate_purchase endpoint like expected in the iOS SDK.

[facebook-github-bot]

@flovilmart updated the pull request.

[flovilmart]

It also add a requiredColumns concept to the schema to validate that the products are properly formed when created and that a user can't delete a key that is required too.

Any other Schema could benefit that feature as it's baked into the validateObject method.

[nlutsenko]

Looks great, minus style nits, but they don't matter here, since we don't have jslint/jshint/etc yet... (it's coming). I can help test this e2e with App Store next week, if you need it...

[flovilmart]

your call!
This should not be affected much by any other change on master I believe

[nlutsenko]

Ok, great... Do we want to wait for e2e test or merge as is and then test?

[nlutsenko]

W00t!

[flovilmart]

🎉 🍻

[francesc-o]

So, sorry for the question, but does parse server now fully support the SDK's class PFPurchase and all its methods, including restore?
Thanks

[LiamInJapan]

I seem to be able to do purchases through PFPurchase, but restore seems to break with the following error:

Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

Thanks for a great piece of software!

[flovilmart]

Can you provide the logs when running with VERBOSE=1?

Not sure we implemented the restauration end points.

[LiamInJapan]

Not having a restore purchases button is grounds for app rejection on the Apple App Store :(

Here's the heroku-side output with VERBOSE=1:

2017-02-09T05:27:36.568640+00:00 app[web.1]: verbose: REQUEST for [POST] /parse/validate_purchase: {
2017-02-09T05:27:36.568658+00:00 app[web.1]: "receipt": {
2017-02-09T05:27:36.568659+00:00 app[web.1]: "__type": "Bytes",
2017-02-09T05:27:36.568696+00:00 app[web.1]: "base64": "<big load of base 64>"
2017-02-09T05:27:36.568697+00:00 app[web.1]: },
2017-02-09T05:27:36.568698+00:00 app[web.1]: "productIdentifier": "com.blah.pack1"
2017-02-09T05:27:36.568709+00:00 app[web.1]: } method=POST, url=/parse/validate_purchase, host=sheltered-woodland-11191.herokuapp.com, connection=close, x-parse-client-version=i1.14.2, accept=/, x-parse-application-id=VPlIRFrvneMiaMv17VxZmgUFkQ9NM0T3XwWjbHie, x-parse-client-key=lMqO5zipE1ISOylnhgzwWxQ8KS2jQofOLggi2i2o, x-parse-installation-id=c8ecbfcc-b1f0-4c83-b6dc-976fde0721fb, accept-language=en-gb, x-parse-os-version=10.2 (14C92), accept-encoding=gzip, deflate, content-type=application/json; charset=utf-8, user-agent=Words/1.2.1 CFNetwork/808.2.16 Darwin/16.3.0, x-parse-app-build-version=1.2.1, x-parse-app-display-version=1.2.1, x-request-id=b336d06c-56a3-4031-a190-581c709f2bc8, x-forwarded-for=106.132.216.135, x-forwarded-proto=https, x-forwarded-port=443, via=1.1 vegur, connect-time=1, x-request-start=1486618056333, total-route-time=0, content-length=6959, __type=Bytes, base64=, productIdentifier=com.blah.pack1
2017-02-09T05:27:37.207664+00:00 app[web.1]: error: the handler did not include a "response" or a "location" field
2017-02-09T05:27:37.209986+00:00 app[web.1]: (node:17) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): control should not get here
2017-02-09T05:27:37.210629+00:00 app[web.1]: (node:17) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
2017-02-09T05:28:06.578359+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=POST path="/parse/validate_purchase" host=sheltered-woodland-11191.herokuapp.com request_id=b336d06c-56a3-4031-a190-581c709f2bc8 fwd="106.132.216.135" dyno=web.1 connect=1ms service=30243ms status=503 bytes=0