[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 james):

 So you have different databases _within_ each language directory? One
 approach would be to do something like `fr-DATABASE` for each named
 DATABASE. It doesn't separate by two levels of directories, but can be
 done now without modification in omega (but of course would need changes
 at your end — although you could create your existing structure and then
 use symlinks, which would be a minor finishing-up step).

 If we do want to go down this road, the main place you'll want to look in
 the code is `omega.cc:map_dbname_to_dir()`. CGI parameters are managing
 into a multimap called `cgi_params` (which is mostly set up in
 `cgiparam.cc` but is used a lot in `omega.cc` so I'd look there).

 Some other thoughts:

 1. `LOC` would have to not contain a slash, but also shouldn't be `..`.
 There may be other characters we'd have to sanitise for security.
 2. You'll probably need `xLOC`, acting as `xDB` (it's documented in
 `cgiparams.rst` / `cgiparams.html`).
 3. `LOC` may not be the best name. `DBGROUP` might make more logical
 sense.

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Ticket URL: <https://trac.xapian.org/ticket/792#comment:1>
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