ElastiLog

Lightweight package for logging to Elasticsearch / OpenSearch.

Includes ASP.NET middleware for automatically capturing request and response data.

Options (AddElastiLog(options => ...))

• OnPrerequest / OnPostrequest - synchronous hooks run right before/after the request pipeline.
• OnPrerequestAsync - awaited right after OnPrerequest, before the request is passed down the pipeline. Use for enrichment that needs async work (e.g. peeking at a buffered request body) that a synchronous hook can't do.
• EnableStartLogging (default false) - when true, sends a thin phase: "start" document immediately (after OnPrerequest/OnPrerequestAsync), keyed by the request's trace identifier as an explicit document id, then overwrites that same document in place with the full phase: "completed" data at request end - instead of two separate, hard-to-correlate documents. A request that never completes leaves a permanent, directly queryable "still starting" document behind. Requires a native Elasticsearch/OpenSearch _doc endpoint (the explicit-id write always PUTs to {index}/_doc/{id}, bypassing the configured Path template and any {token} substitution it does for the normal, auto-id case) - not compatible with a token-routed logging endpoint.