Add a proxy endpoint for `CancelOperation()` requests to bgd browser-backend

Santiago Gilrequested to merge
santigl/browser-backend/cancel-operation into master

Before raising this MR, consider whether the following are required, and complete if so:

  • Unit tests
  • [ ] Metrics
  • Documentation update(s) (docstrings)

If not required, please explain in brief why not.

Description

This adds an endpoint in browser/app.py to cancel operations.

Changes proposed in this merge request:

  • Add DELETE route: "/api/v1/operations/{name}" (analogous to the GetOperations() route)
  • Add handler that forwards the CancelOperation() request for the given operation name
  • Add unit tests

Validation

Issuing

curl -X "DELETE" http://localhost:8083/api/v1/operations/$OPERATION_NAME

returns silently for a known operation and cancels it; prints "404: Not Found" for an invalid/non-existing $OPERATION_NAME.

Issues addressed

Addresses #362 (closed), unblocks bgd-browser#5 (closed).

Edited by Santiago Gil

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