Forum Discussion
ML_108504
Nimbostratus
NimbostratusHTTP::respond question on content
I'm attempting to compose an iRule where the F5 will respond with a standard JBoss 404 if there's a match to certain URIs.
I have two issues.
1. I want to insert the requested URI into the HTTP::respond content section, using the HTTP::uri command. Is this feasible? Do I need to use escape characters in order to use HTTP:: commands (or variables for that matter) inside of a HTTP::respond content section?
The code below just treats [HTTP::uri] as a text string.
HTTP::respond 404 content {JBossWeb/2.0.1.GA - Error report HTTP Status 404 - [HTTP::uri]type Status reportmessage [HTTP::uri]description The requested resource ([HTTP::uri]) is not available.JBossWeb/2.0.1.GA} noserver
2. This HTTP::respond command passes the following to the client, and I don't want the Connection and Content-Length headers passed this way. I'm not doing this explicitly, how can I prevent these two lines from appearing? I just want the section to be passed to the client, with the [HTTP::uri] value passed by the client.
Connection: Keep-Alive
Content-Length: 979
JBossWeb/2.0.1.GA - Error report HTTP Status 404 - [HTTP::uri]type Status reportmessage [HTTP::uri]description The requested resource ([HTTP::uri]) is not available.JBossWeb/2.0.1.GA
6 Replies
hoolioCirrostratus
The outermost curly braces prevent variable expansion/interpretation of commands in TCL. You should be able to use subst (Click here) to force evaluation of the [HTTP::uri] command within the curly braces:
HTTP::respond 404 content [subst {test URI: [HTTP::uri] }] noserver
The Connection and Content-Length headers are inserted automatically. You could try setting a Connection: Close header, but I'm guessing it would be appended to the request and not replace the Connection: Keep-Alive header.
HTTP::respond 404 content [subst {test URI: [HTTP::uri] }] noserver Connection Close
And LTM needs to insert the Content-Length header in order to tell the client how much data will be sent.
Aaron
ML_108504Ah. That answers both my questions. Good stuff to know. Hmmm, too bad about the 2nd point.
Thanks!- If you really don't want the headers there, you could probably use TCP::respond instead.
- hoolioGood point on TCP::respond. I'm just not sure what kind of client would handle data coming back with no Content-Length or Connection header. It seems like you would need at least one or the other for the client to accept the response.
Aaron - ML_108504Hi guys, just to clarify:
The problem isn't that the bigip is sending those headers, the problem is that the two headers are appearing as text in the html page. In other words, I think my problem is that these headers are not actually being sent as headers.
Does that make sense? I think I need to bite the bullet and just trace the communication and post the relevant example up here. When I get time ... - hoolioCan you try testing without the noserver flag? Which version are you testing this on?
Aaron
