On Mon, Aug 02, 2004 at 11:55:56AM -0700, Stas Bekman wrote: [...]
I mentioned to Geoff off-list about possibly using a flush bucket, since I don't have a test setup ready (just replaced my dead laptop hard drive)
Thanks Glenn, calling $r->rflush works perfectly fine to cause user-preset C-L header to be delivered to the client on HEAD request.
I wrote:
I used to make good use of $r->send_http_header() in my MP1 handlers. This method isn't available in MP2 (why?), though I could picture it replaced by sending a flush bucket down the filter chain.
On Tue, Aug 03, 2004 at 10:04:38AM -0400, Geoffrey Young wrote:
apache now sends the headers for you via the header filter. if you were allowed to send your own headers you might send them before a filter ran that would alter the headers. for instance, mod_include removes the ETag header.
I think this is not the reason why ap_send_http_header was removed from Apache2 API. It's simply not needed because the headers_out filter will inject the headers as soon as some body is sent. Your example of mod_include doesn't work if the response handler does:
$r->print("foo bar");
$r->rflush; # or if the previous print was big enough to cause flush
$r->print(q[<!--#include virtual="/foo" -->]);Would a flush bucket be a great way to say "send headers now"? So if you're not going to send the actual content down the filter chain on a HEAD request, would sending a flush bucket make things happy?
It does.
IIF this works, can I make a request the $r->send_http_header() be implemented in Apache2 to do just that? (create and pass a flush bucket)
Absolutely. But it'd be nice if you could first ask the httpd-dev list: http://httpd.apache.org/lists.html#http-dev if they are interested in adding the C API to do that.
If httpd-dev doesn't do it, I suppose we can still implement it in mp2.
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