I am trying to have the load balancer respond as the server. The POST's that are coming in do not require any data returned, but are using the Expect: 100-Continue header. The below works and I see the transaction complete via a tcpdump, but why does the logging of the payload not work? Trying to figure out where the events stack up once taking over as the server. [CODE] when HTTP_REQUEST { if { [HTTP::host] eq "mycompany.com" }{ HTTP::collect [HTTP::header "Content-Length"] if { [HTTP::header Expect] eq "100-continue" }{ HTTP::respond 100 noserver } } } when HTTP_REQUEST_DATA { log local0. "[HTTP::payload]" } [/CODE]

was http_request_data event executed? did you see blank line of log?

Yes, there is a blank log message suggesting the event did fire.

did you see content-length header and payload in the tcpdump?

Yes, there was a content-length and a one line payload in the tcpdump

this is my testing. [root@ve10:Active] config b virtual bar list virtual bar { snat automap pool foo destination 172.28.19.79:80 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 { if { [HTTP::host] eq "mycompany.com" }{ HTTP::collect [HTTP::header "Content-Length"] if { [HTTP::header Expect] eq "100-continue" }{ HTTP::respond 100 noserver } } } when HTTP_REQUEST_DATA { log local0. "[HTTP::payload]" } } on client [root@centos251 ~] curl -d "this_is_post_data" http://172.28.19.79 -H "host: mycompany.com" on bigip [root@ve10:Active] config ssldump -Aed -nni 0.0 port 80 New TCP connection 1: 172.28.19.251(43004) <-> 172.28.19.79(80) 1344602578.5274 (0.0012) C>S --------------------------------------------------------------- POST / 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 Accept: */* host: mycompany.com Content-Length: 17 Content-Type: application/x-www-form-urlencoded this_is_post_data--------------------------------------------------------------- New TCP connection 2: 200.200.200.10(43004) <-> 200.200.200.101(80) 1344602578.5293 (0.0017) C>S --------------------------------------------------------------- POST / 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 Accept: */* host: mycompany.com Content-Length: 17 Content-Type: application/x-www-form-urlencoded this_is_post_data--------------------------------------------------------------- [root@ve10:Active] config tail /var/log/ltm Aug 10 20:42:58 local/tmm info tmm[4860]: Rule myrule : this_is_post_data

Collect Payload after 100-Continue

11 Replies

nitass
Employee
Aug 10, 2012
was http_request_data event executed? did you see blank line of log?
Brian_69413
Nimbostratus
Aug 10, 2012
Yes, there is a blank log message suggesting the event did fire.
nitass
Employee
Aug 10, 2012
did you see content-length header and payload in the tcpdump?
Brian_69413
Nimbostratus
Aug 10, 2012
Yes, there was a content-length and a one line payload in the tcpdump

nitass

Employee

Aug 10, 2012

this is my testing.

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   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 {
   if { [HTTP::host] eq "mycompany.com" }{
      HTTP::collect [HTTP::header "Content-Length"]
      if { [HTTP::header Expect] eq "100-continue" }{
         HTTP::respond 100 noserver
      }
   }
}
when HTTP_REQUEST_DATA {
   log local0. "[HTTP::payload]"
}
}

 on client

[root@centos251 ~] curl -d "this_is_post_data" http://172.28.19.79 -H "host: mycompany.com"

 on bigip

[root@ve10:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.19.251(43004) <-> 172.28.19.79(80)
1344602578.5274 (0.0012)  C>S
---------------------------------------------------------------
POST / 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
Accept: */*
host: mycompany.com
Content-Length: 17
Content-Type: application/x-www-form-urlencoded

this_is_post_data---------------------------------------------------------------

New TCP connection 2: 200.200.200.10(43004) <-> 200.200.200.101(80)
1344602578.5293 (0.0017)  C>S
---------------------------------------------------------------
POST / 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
Accept: */*
host: mycompany.com
Content-Length: 17
Content-Type: application/x-www-form-urlencoded

this_is_post_data---------------------------------------------------------------

[root@ve10:Active] config  tail /var/log/ltm
Aug 10 20:42:58 local/tmm info tmm[4860]: Rule myrule : this_is_post_data

Brian_69413
Nimbostratus
Aug 10, 2012
Why does your SSL Dump not show the 100 status response?

I think part of the problem is that the post data only comes after receiving the 100 response from the server, but it is not a new HTTP request.

Brian_69413

Nimbostratus

Aug 10, 2012

This is what I see on a transaction:


New TCP connection 1: 4.59.146.74(60372) <-> *.*.*.*(80)
1344605329.3721 (0.0066)  C>S
---------------------------------------------------------------
POST /smspostback HTTP/1.1
User-Agent: CDYNE SMSv2
Content-Type: application/x-www-form-urlencoded
Host: mycompany.com
Content-Length: 161
Expect: 100-continue
Connection: Keep-Alive

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

1344605329.3722 (0.0001)  S>C
---------------------------------------------------------------
HTTP/1.0 100 Continue
Connection: Keep-Alive
Content-Length: 0

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

1344605329.3789 (0.0066)  C>S
---------------------------------------------------------------
SMSSent=1&MessageID=b99b166b-559a-4a60-ad3b-ac3f0ac09c5c&ReferenceID=&FromPhoneNumber=***********&ToPhoneNumber=***********&SentTime=8%2f10%2f2012+1%3a28%3a49+PM---------------------------------------------------------------

1    1344605334.3497 (4.9708)  C>S  TCP FIN
1    1344605334.3498 (0.0000)  S>C  TCP FIN

Brian_69413
Nimbostratus
Aug 10, 2012
Oh wait, the LB is responding with an HTTP/1.0 response...DOH!

This is why the below hangs...
curl -d "this_is_post_data" http://mycompany.com -H "Expect: 100-continue"
Brian_69413
Nimbostratus
Aug 12, 2012
Does anyone have any ideas on where to capture the continued POST data?

nitass

Employee

Aug 12, 2012

what about this one?

[root@ve10:Active] config  b virtual bar list
virtual bar {
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   if { [HTTP::host] eq "mycompany.com" } {
      HTTP::collect [HTTP::header "Content-Length"]
   }
}
when HTTP_REQUEST_DATA {
   log local0. "[HTTP::payload]"
   if { [HTTP::header Expect] eq "100-continue" } {
      HTTP::respond 100 noserver
   } else {
      HTTP::respond 200 noserver
   }
}
}

 on client
[root@centos251 ~] curl -d "this_is_post_100_data" -i http://172.28.19.79 -H "Host: mycompany.com" -H "Expect: 100-continue"
HTTP/1.0 100 Continue
Connection: Keep-Alive
Content-Length: 0


[root@centos251 ~] curl -d "this_is_post_data" -i http://172.28.19.79 -H "Host: mycompany.com"
HTTP/1.0 200 OK
Connection: Keep-Alive
Content-Length: 0

 on bigip
[root@ve10:Active] config  cat /var/log/ltm
Aug 12 18:23:54 local/tmm info tmm[14353]: Rule myrule : this_is_post_100_data
Aug 12 18:24:12 local/tmm info tmm[14353]: Rule myrule : this_is_post_data

Forum Discussion

Collect Payload after 100-Continue

11 Replies

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