Source: Ghost blog
Ghost Note: I first saw it in sobiny two days ago. Later I saw the related code in lcx. Now I have written another php version in 7j.
Summary
I. Talk about 449
Author: sobiny [B. c. t]
Source:
Http://sobiny.cn
HTTP status code
We often see about 200,404,500.
So what is the status code 449?
Description on MSDN:
Retry after doing the appropriate action
GOOGLE online translation:
Make appropriate actions after retrial
Haha, after testing, the response after the IE browser receives the HTTP status code 449 is:
First, like the normal HTML execution, the information returned by 449 is first executed.
Then, the system automatically browses the currently submitted page.
Other browsers are not tested. The same is probably true. Otherwise, it is a browser BUG, because this is a normal HTTP status header.
In various dynamic scripts, the status code seems to be quite effective.
You can use JS to collect COOKIES and other things before executing the page ..
Or verify the user's information.
I'm not sure I want to think about the Trojan.
There are simple implementation methods in ASP.
PHP only needs to set the HTTP status header.
However, the sample code is not provided here.
Asp href = "http://sobiny.cn/6.asp" target = _ blank>
Http://sobiny.cn/6.asp
Test page
Ii. 449 status code application example
Lcx version
Source: vbs small shop <%
If session ("test") = "" then
Session ("test") = ""
%>
<Html>
<Script language = jscript>
Alert (1 );
</Script>
</Html>
<%
Response. Status = "449"
Else
Session ("test") = ""
%>
<Html>
</Html>
<%
End if
%>
======================= Cookies <%
Dim Num
Num = Request. Cookies ("Visit_num ")
If num = "" Then
Num = 1
Response. Cookies ("Visit_num") = num
%>
<Html>
<Script language = jscript>
Alert (1 );
</Script>
</Html>
<%
Response. Status = "449"
Else
Num = num + 1
Response. Cookies ("Visit_num") = num
End if
If num> 1 Then
Response. Status = "200"
Response. Cookies ("Visit_num") = ""
End if
%> ================
=============================== Another ie bug <script type = "text/jscript">
Function init (){
Document. write ("The time is:" + Date ());
}
Window. onload = init;
</Script> ------------------------------------------------------------------------
PHP version of 7j
Source: 7 jdgs Blog <?
$ Thepass = helloword;
If (! Isset ($ _ COOKIE [webserver]) {
Setcookie ("webserver", $ thepass, time () + (1*24*3600 ));
Header ("HTTP/1.1 449 Retry ");
Echo "<script language = jscript> alert (1); </script> ";
}
Echo "</Html> ";
?>
