webmcp

annotate framework/env/param/get.lua @ 567:5e3ebe9fd0ce

Added tag v2.2.1 for changeset 3b71fdb3a00d
author jbe
date Wed Apr 28 13:07:52 2021 +0200 (5 months ago)
parents 32ec28229bb5
children
rev   line source
jbe/bsw@0 1 --[[--
jbe/bsw@0 2 value = -- value of the parameter casted to the chosen param_type
jbe/bsw@0 3 param.get(
jbe/bsw@0 4 key, -- name of the parameter
jbe/bsw@0 5 param_type -- desired type of the returned value
jbe/bsw@0 6 )
jbe/bsw@0 7
jbe/bsw@0 8 Either a GET or POST request parameter is returned by this function, or if param.exchange(...) was called before, one of the exchanged parameters is returned. You can specify which type the returned value shall have. If an external request parameter was used and there is another GET or POST parameter with the same name but a "__format" suffix, the parser with the name of the specified format will be automatically used to parse and convert the input value.
jbe/bsw@0 9
jbe/bsw@0 10 --]]--
jbe/bsw@0 11
jbe/bsw@0 12 function param.get(key, param_type)
jbe/bsw@0 13 local param_type = param_type or atom.string
jbe/bsw@0 14 if param._exchanged then
jbe/bsw@0 15 local value = param._exchanged.params[key]
jbe/bsw@0 16 if value ~= nil and not atom.has_type(value, param_type) then
jbe/bsw@0 17 error("Parameter has unexpected type.")
jbe/bsw@0 18 end
jbe/bsw@0 19 return value
jbe/bsw@0 20 else
jbe@223 21 local str = request.get_param{ name = key }
jbe@223 22 local format_info = request.get_param{ name = key .. "__format" }
jbe/bsw@0 23 if not str then
jbe/bsw@0 24 if not format_info then
jbe/bsw@0 25 return nil
jbe/bsw@0 26 end
jbe/bsw@0 27 str = ""
jbe/bsw@0 28 end
jbe/bsw@0 29 return param._get_parser(format_info, param_type)(str)
jbe/bsw@0 30 end
jbe/bsw@0 31 end

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