Mixin module. It provides the follow functionality groups:
Access to CGI environment variables as methods. See documentation to the CGI class for a list of these variables.
Access to cookies, including the cookies attribute.
Access to parameters, including the params attribute, and overloading
to perform parameter value lookup by key.
The initialize_query method, for initialising the above mechanisms, handling multipart forms, and allowing the class to be used in “offline” mode.
Get the value for the parameter with a given key.
If the parameter has multiple values, only the first will be retrieved; use params() to get the array of values.
# File cgi.rb, line 1165 def [](key) params = @params[key] return '' unless params value = params[0] if @multipart if value return value elsif defined? StringIO StringIO.new("") else Tempfile.new("CGI") end else str = if value then value.dup else "" end str.extend(Value) str.set_params(params) str end end
Returns true if a given parameter key exists in the query.
# File cgi.rb, line 1191 def has_key?(*args) @params.has_key?(*args) end