I had the situation that an RSS request made to a server resultet in a 404 instead 200. I analyzed it and it came to my attention that using the Port within the Host Request header (as snoopy does) triggers that error.
Since HOST is not a valid http/1.0 (Request) Header(1), (2) applies here. Port 80 is the default Port for HTTP(2) it must not be part of the HOST Header. Since this is causing the Error with lighttpd/1.4.11 I suggest to modify the snoopy class:
file: wp-inludes/class-snoopy.php
line: 799ff
change from:
if(!empty($this->port))
$headers .= ":".$this->port;
change to:
if(!empty($this->port))
if ($this->port != 80) {
$headers .= ":".$this->port;
}
BTW this type of HTTP Implementation is similar to other stable and mature libraries on various platforms.
(1) see Full-Request in http://www.faqs.org/rfcs/rfc1945.html
(2) see 14.23 in http://www.faqs.org/rfcs/rfc2616.html
