Forum OpenACS Q&A: Changing http headers

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1: Changing http headers
Posted by Michael Hinds on 08/23/02 12:50 PM
Hi,

I'm trying to add extra stuff into my outgoing http headers. I thought something like this might work:

ns_set put [ad_conn outputheaders] Cache-Control "max-age=3600, must-revalidate"

but it doesn't. Is there some way of specifying extra headers to Mr. Request Processor via the API? I don't want to have to revert back to doc_return or ns_return if I can help it!

TIA, Michael

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2: Response to Changing http headers (response to 1)
Posted by Michael Hinds on 08/23/02 12:54 PM
Oops! Actually it does work, but I suppose the question about the API still stands...
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3: Response to Changing http headers (response to 1)
Posted by Michael A. Cleverly on 09/04/02 07:04 AM
The request processor doesn't have anything magical in this regard, and if it did, it'd just be a short cut for what you typed above. Perhaps a short wrapper proc (to make things read more cleanly?) along the lines of: 
    ad_proc append_outputheader {-overwrite:boolean key value} {
        Add an output header that will get written to the client
        connection.  Use -overwrite to update a key that already
        exists (without -overwrite a duplicate key results in 
        multiple headers being sent to the client which may very
        well be OK depending on the header).
    } {
        if {$overwrite_p} {
            ns_set update [ad_conn outputheaders] $key $value
        } else {
            ns_set put [ad_conn outputheaders] $key $value
        }
    }