@property<EOL><INDENT>def content_length(self):<DEDENT>
return int(self.environ.get('<STR_LIT>') or -<NUM_LIT:1>)<EOL>
The request body length as an integer. The client is responsible to
            set this header. Otherwise, the real length of the body is unknown
            and -1 is returned. In this case, :attr:`body` will be empty.