jbe@255: --[[--
jbe@255: request.add_variable(
jbe@255:   tbl,                 -- table where the variable is stored
jbe@255:   key,                 -- name of variable (key within the table)
jbe@255:   value                -- optional value for initialization
jbe@255: )
jbe@255: 
jbe@259: Marks a field of a table to be re-initialized for every request. If this variable (i.e. the field of the table) is modified before the first requst is being handled (e.g. during configuration or pre-/post-fork initializers), then the modified value will be used for re-initialization on every request. If the (modified) value is a table, the table will be cloned on every request to avoid side-effects between different requests. Note, however, that only the first level of the table is cloned. See env/request/__init.lua for examples.
jbe@255: 
jbe@255: --]]--
jbe@255: 
jbe@255: function request.add_variable(tbl, key, value)
jbe@259:   local initval, istable
jbe@255:   tbl[key] = value
jbe@255:   request.add_initializer(function(first)
jbe@255:     if first then
jbe@259:       initval = tbl[key]
jbe@259:       istable = type(initval) == "table"
jbe@255:     else
jbe@259:       if istable then
jbe@259:         tbl[key] = table.new(initval)
jbe@259:       else
jbe@259:         tbl[key] = initval
jbe@259:       end
jbe@255:     end
jbe@255:   end)
jbe@255: end