Implement ABAP API proxy

[fleischr]

3 different ways to build an API proxy

Code it manually with http client class
-tons of data type tinkering, ABAP doesn't easily serialize JSON/XML into data. requires strong data type declarations everywhere

Use openAPI generator
+open source
+built by the biggest CHAD of open source ABAP (Lars)
+likely works perfectly well when implemented
-node.js version poorly documented, a bit of tinkering with a fork of the project to load into our ABAP dev system
-more of PoC, not sure if it's been used in prod

Build web service consumer in SPROXY
+most battle tested way to consume APIs in ABAP
+/- SAP PO. Not avail to us now. Its standard to most SAP environments, but still kindof sucks
-SOAMANAGER set up if w/o PO. every ABAPer hates that
-SAP relies on SOAP as a common denominator

[fleischr]

Class z100085_zcl_proubc_api_sicf in ABAP used for inbound API

[fleischr]

IF_HTTP_EXTENSION~HANDLE_REQUEST routes requests

[kthomas]

See also this secret gist containing the core concepts we are implementing, from the perspective of the REST API client that calls into SAP for all required methods...

https://gist.github.com/kthomas/99036bce8f3bbb3f6af90bbea7e35790