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/core.rb, line 627
def [](key)
params = @params[key]
return '' unless params
value = params[0]
if @multipart
if value
return value
elsif defined? StringIO
StringIO.new("".force_encoding("ascii-8bit"))
else
Tempfile.new("CGI",encoding:"ascii-8bit")
end
else
str = if value then value.dup else "" end
str
end
end
Returns true if a given parameter key exists in the query.
# File cgi/core.rb, line 651
def has_key?(*args)
@params.has_key?(*args)
end