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kapow/docs/source/theory/request_life_cycle.rst
2019-11-20 13:37:20 +01:00

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Request Life Cycle
==================
This section describes the sequence of events happening for each request
answered by the User HTTP Interface.
#. The user makes a request to the User HTTP Interface
#. The request is matched against the route table
#. Kapow! provides a HANDLER_ID to identify this request
#. Kapow! spawns the binary specified as entrypoint in the matching route
The default entrypoint is /bin/sh; we'll explain this workflow for now.
The spawned entrypoint is run with the following variables added to its environment:
- KAPOW_HANDLER_ID
- KAPOW_DATAAPI_URL
- KAPOW_CONTROLAPI_URL
#. During the lifetime of the shell, the request and response resources are available via these commands:
- kapow get /request/...
- kapow set /response/...
TODO: link to resource tree
#. When the shell dies, Kapow! finalizes the original request.