Forum Discussion
Mike_62629
Nimbostratus
NimbostratusAre http headers case sensitive?
I know the content-matching will be case sensitive, but when doing a header lookup, is the header name itself case sensitive?
Meaning, will this:
[HTTP::header "clientid"]
Return the same data, regardless of whether the http header is clientid, clientId, clientID, Clientid, ClientId, or ClientID?
Thanks for any input.
hooleylistCirrostratus
It's case insensitive. Here's a quick test:when HTTP_REQUEST { Insert a test header with a name of TEST and a value of "some_value" HTTP::header insert TEST "some_value" Log the value of the header with variations on the case if {[HTTP::header exists test]}{ log local0. "test: [HTTP::header value test]"} if {[HTTP::header exists TEST]}{ log local0. "TEST: [HTTP::header value TEST]"} if {[HTTP::header exists TeSt]}{ log local0. "TeSt: [HTTP::header value TeSt]"} }
Here is the log output:
: test: some_value
: TEST: some_value
: TeSt: some_value
Aaron
Mike_62629Thanks again, didn't think to test it like that.- hooleylistYou could also send custom headers (and cookies) from the BIG-IP itself using curl. The BIG-IP can answer requests from the CLI to a VIP on 9.4.0 and above.
curl -k https://VIP/test/ -H "Host: somehost" -H "some_header: some_header_value" -H "Cookie: some_cookie=some_value"
Aaron - Nice example Aaron! Maybe I need to add a page to the Wiki that lists "Cool iRule Tricks!" where we list things like this curl command that are helpful when dealing with iRules, but aren't direct iRules code/commands.
Dig it....
Colin - Since the iRules inherently depend on the profiles applied to VIPs to determine how they'll behave and what commands are valid, there's no way to test them without applying them to a system.
Colin
