Improve _config error handling by validating certain (if not all) values based
on their keys
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Key: COUCHDB-1215
URL: https://issues.apache.org/jira/browse/COUCHDB-1215
Project: CouchDB
Issue Type: Improvement
Components: Futon, HTTP Interface
Affects Versions: 1.1
Reporter: Benjamin Young
Priority: Minor
When saving values via Futon or the HTTP API, it's easy to put in values that
are invalid and could make CouchDB unbootable. Some level of validation here
would save the day in most cases or the disposal of the incorrect values with a
log message (rather than preventing startup).
In my case, I'd added just <<"http://google.com/";>> to the value of the _google
key in the httpd_global_handlers section and that prevented CouchDB from
starting. The ever fabulous Paul Davis pointed out my error and it was "easy
enough" to fix by altering the value in the .ini file to be the correct
value...which is: {couch_httpd_proxy, handle_proxy_req,
<<"http://www.google.com";>>}
In the case of these httpd_global_handlers a simple check that it's an Erlang
tuple with at least two terms would be a simple check that would have kept my
CouchDB instance up.
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