- responseFatalJSON(w, r, err) replaces responseJSON(w, r, 500, err)
and calls fatal() when the following fail because they are
not recoverable. There may be other non-recoverable errors but
it is difficult to be 100% sure they cannot be engineered by the
caller of the API for DoS purposes.
- openDB
- findCache
- cache.Repo != repo
- wrap errors in
- openDB() - it was missing
- readCache() - it was missing
- useCache() - it was missing
- findCache() - some had identical messages
- in gc
- replace logger.Warnf with h.fatal
- differentiate errors that have identical messages
- call fatal if openDB fails instead of returning
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