// Spaces between the header key and colon are not allowed.
		// See RFC 7230, Section 3.2.4.
		{"Foo : bar\r\n", 400},
		{"Foo\t: bar\r\n", 400},

		// Empty header keys are invalid.
		// See RFC 7230, Section 3.2.
		{": empty key\r\n", 400},

		// Requests with invalid Content-Length headers should be rejected
		// regardless of the presence of a Transfer-Encoding header.