Changing HTTP Reponse status code

Can you clarify? Usually a 404 is generated by the server in response to a request for something that doesn't exist. The user wouldn't ask for a "404.jsp" page. That's just what the server would send if it couldn't honor the actual request. And which payload to you have to capture (request or response)?

can we just check HTTP::status in response and send out 200?

e.g.

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.252:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_RESPONSE {
  if { [HTTP::status] == 404 } {
    HTTP::respond 200
  }
}
}

 test

[root@ve10:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.18.204.228(49530) <-> 172.28.19.252(80)
1373588986.4110 (0.0048)  C>S
---------------------------------------------------------------
GET /not_real_uri HTTP/1.1
Host: 172.28.19.252
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive

---------------------------------------------------------------

New TCP connection 2: 200.200.200.10(49530) <-> 200.200.200.101(80)
1373588986.4121 (0.0010)  C>S
---------------------------------------------------------------
GET /not_real_uri HTTP/1.1
Host: 172.28.19.252
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive

---------------------------------------------------------------

1373588986.4132 (0.0010)  S>C
---------------------------------------------------------------
HTTP/1.1 404 Not Found
Date: Fri, 12 Jul 2013 00:40:19 GMT
Server: Apache/2.2.3 (CentOS)
Content-Length: 288
Connection: close
Content-Type: text/html; charset=iso-8859-1

...snipped...
---------------------------------------------------------------

1373588986.4133 (0.0022)  S>C
---------------------------------------------------------------
HTTP/1.0 200 OK
Server: BigIP
Connection: close
Content-Length: 0

---------------------------------------------------------------

Sure, right now what's in place is:

 

 

when HTTP_RESPONSE {

 

if { [HTTP::status] == "404" or [HTTP::status] == "501" }{

 

HTTP::redirect "/error/404.jsp"

 

}

 

}

 

 

So what's happening is the 404 response is getting intercepted and replaced with a 302 with the error page URL.

 

Since the error page exists, when the 302 is followed, you'll get a 200 from that request.

 

 

From the client's perspective, they asked for a resource that didn't exist, received a redirect and then a valid response. The valid response is an error page which is obvious to a user, but to an automated system, it appears as though the request was valid.

 

 

Does that make more sense?

 

 

Thanks,

 

Ben

 

when HTTP_RESPONSE {

 

if { [HTTP::status] == "404" or [HTTP::status] == "501" }{

 

HTTP::redirect "/error/404.jsp"

 

}

 

}so, does this work?

 

 

by the way, have you ever tried HTTP::retry instead of HTTP::redirect? so, client does not need to send another request (i.e. /error/404.jsp).

 

 

HTTP::retry

 

https://devcentral.f5.com/wiki/irules.http__retry.ashx

Posted By nitass on 07/11/2013 11:02 PM

 

when HTTP_RESPONSE {

 

if { [HTTP::status] == "404" or [HTTP::status] == "501" }{

 

HTTP::redirect "/error/404.jsp"

 

}

 

} so, does this work?

 

 

by the way, have you ever tried HTTP::retry instead of HTTP::redirect? so, client does not need to send another request (i.e. /error/404.jsp).

 

 

HTTP::retry

 

https://devcentral.f5.com/wiki/irules.http__retry.ashx

 

It works in that the client is sent a 302 to the error page.

 

The condition I'm looking to modify is the subsequent request the client will make for the /error/404.jsp page.

 

We want the HTTP Status for this request to be 404.

 

 

Thanks!

 

We want the HTTP Status for this request to be 404.is it something like this?

 

 

Need to change the HTTP Status code. (spark's reply)

 

https://devcentral.f5.com/community/group/aft/2161382/asg/50

 

 

e.g.

 

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.252:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
  set is_404 0
  if { [HTTP::uri] eq "/error/404.jsp" } {
    set is_404 1
  }
}
when SERVER_CONNECTED {
  TCP::collect 12
}
when SERVER_DATA {
  if { $is_404 } {
    set payload [TCP::payload 12]
    regsub 200 $payload 404 payload
    TCP::payload replace 0 12 $payload
  }
  TCP::release
  TCP::collect 12
}
}

[root@ve10:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.20.17(38929) <-> 172.28.19.252(80)
1373613950.6180 (0.0018)  C>S
---------------------------------------------------------------
GET /error/404.jsp HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.252
Accept: */*

---------------------------------------------------------------

New TCP connection 2: 200.200.200.10(38929) <-> 200.200.200.101(80)
1373613950.6191 (0.0010)  C>S
---------------------------------------------------------------
GET /error/404.jsp HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.252
Accept: */*

---------------------------------------------------------------

1373613950.6211 (0.0020)  S>C
---------------------------------------------------------------
HTTP/1.1 200 OK
Date: Fri, 12 Jul 2013 07:36:23 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Fri, 12 Jul 2013 07:35:31 GMT
ETag: "4185d1-1d-8e2db6c0"
Accept-Ranges: bytes
Content-Length: 29
Connection: close
Content-Type: text/plain; charset=UTF-8

this is /error/404.jsp file.
---------------------------------------------------------------

1373613950.6212 (0.0031)  S>C
---------------------------------------------------------------
HTTP/1.1 404 OK
Date: Fri, 12 Jul 2013 07:36:23 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Fri, 12 Jul 2013 07:35:31 GMT
ETag: "4185d1-1d-8e2db6c0"
Accept-Ranges: bytes
Content-Length: 29
Connection: close
Content-Type: text/plain; charset=UTF-8

this is /error/404.jsp file.
---------------------------------------------------------------

I believe you should also be able to use strictly HTTP events:

when HTTP_REQUEST {
if { [HTTP::uri] equals "/error/test.jsp" } {
set is404 1
}
}
when HTTP_RESPONSE {
if { [info exists is404] } {
HTTP::collect [HTTP::header Content-Length]
}
}
when HTTP_RESPONSE_DATA {
HTTP::respond 404 content [HTTP::payload]
}

that is nice, Kevin! :-)