[Xapian-tickets] [Xapian] #792: Add a CGI param "LOC" to indicate a path to a leaf from database_dir folder

[Xapian]

#792: Add a CGI param "LOC" to indicate a path to a leaf from database_dir folder
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 Reporter:  ohallot      |             Owner:  olly
     Type:  enhancement  |            Status:  new
 Priority:  normal       |         Milestone:
Component:  Omega        |           Version:
 Severity:  normal       |        Resolution:
 Keywords:               |        Blocked By:
 Blocking:               |  Operating System:  All
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Comment (by olly):

 james: I think it's the other way around - `pt-BR`, etc are Xapian
 databases, but there's a set of those within each version directory.

 I assume this follows on from a recent IRC discussion about why
 `DB=6.4/fr` didn't work.

 I'm not sure adding another CGI variable it really the best way to resolve
 the current restriction.  It allows `LOC=6.4&DB=fr` so solves the
 immediate problem, but it imposes needless restrictions since you can't
 specify a different `LOC` for each `DB`, so you couldn't search the `fr`
 database for every version together (which is probably potentially useful
 here, and certainly is in the wider context).

 My thought would be to instead add a config file option to allow
 specifying the separator used when generating the value for `$dbname` and
 when parsing `DB` parameters.  Then you could pick a different one which
 would allow `/` to be used in `DB` parameters.  We could probably even
 support `//` for that separator which would allow all valid relative Unix
 path names to be specified (a relative path so can't validly start with
 `/`, and double `/` between directory components or a trailing `/` on it
 would each be redundant).

 The separator could default to `/` for compatibility and to avoid
 surprising people on upgrade by suddenly allowing access to databases that
 couldn't previously be reached, but potentially we could change that
 default in a new major version.

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Ticket URL: <https://trac.xapian.org/ticket/792#comment:2>
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