Add plugin APIs to allow for Session "private" data
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Key: TS-503
URL: https://issues.apache.org/jira/browse/TS-503
Project: Traffic Server
Issue Type: New Feature
Components: InkAPI
Reporter: Leif Hedstrom
Today, a plugin can store (and fetch) an opaque piece of data for the
continuation, which is useful to preserve state between HOOKS. There is also a
similar API for transaction data. However, as far as I can tell, there's no way
to have per session private data. It'd be useful to add the equivalent here,
e.g. something like
INKReturnCode INKSsnDataSet(INKHttpSsn ssn, int64 id, void* data);
void* INKSsnDataGet(NKHttpSsn ssn, int64 id);
The id is a unique identifier, registered via a different API in the plugin.
This ID allows for more than one plugin to set/get session data structure,
without stepping over each other. IDs can either be randomly assigned, or
reserved in a plugin ID "registry".
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