So nginx is not interpreting folded headers correctly?

HTTP/1.1 header field values can be folded onto multiple lines if the

continuation line begins with a space or horizontal tab. All linear white space, including folding, has the same semantics as SP. A recipient MAY replace any linear white space with a single SP before interpreting the field value or forwarding the message downstream.(quoted from here)

Here's my server side script,which just dumps the cookie content:

var_dump($_COOKIE);exit;

Here comes my test,please pay attention to the cookie part:

GET /logtest.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.17) Gecko/20110420 AlexaToolbar/alxf-2.11 Firefox/3.6.17
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-cn,zh;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Cookie: A=t;
 artDate=t
Cache-Control: max-age=0

HTTP/1.1 200 OK
Server: iis/8.0
Date: Mon, 23 May 2011 12:38:00 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
Keep-Alive: timeout=20
X-Powered-By: PHP/5.3.2
Set-Cookie: ZDEDebuggerPresent=php,phtml,php3; path=/

27
array(1) {
            ["A"]=>
                     string(1) "t"
                                  }

0

GET /logtest.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.17) Gecko/20110420 AlexaToolbar/alxf-2.11 Firefox/3.6.17
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-cn,zh;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Cookie: A=t;
artDate=t
Cache-Control: max-age=0

HTTP/1.1 200 OK
Server: iis/8.0
Date: Mon, 23 May 2011 12:38:11 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
Keep-Alive: timeout=20
X-Powered-By: PHP/5.3.2
Set-Cookie: ZDEDebuggerPresent=php,phtml,php3; path=/

27
array(1) {
            ["A"]=>
                     string(1) "t"
                                  }

0

GET /logtest.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.17) 开发者_StackOverflow中文版Gecko/20110420 AlexaToolbar/alxf-2.11 Firefox/3.6.17
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-cn,zh;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Cookie: A=t;artDate=t
Cache-Control: max-age=0

HTTP/1.1 200 OK
Server: iis/8.0
Date: Mon, 23 May 2011 12:38:55 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
Keep-Alive: timeout=20
X-Powered-By: PHP/5.3.2
Set-Cookie: ZDEDebuggerPresent=php,phtml,php3; path=/

47
array(2) {
            ["A"]=>
                     string(1) "t"
                                    ["artDate"]=>
                                                   string(1) "t"
                                                                }

0

It's a known issue that doesn't have a high priority.