Re: wwwoffle make GET from HEAD

> > > What browser are you using that makes a HEAD request followed by a GET
> > > request?

> > Both IE and Mozilla-derived browsers do that on file downloads (that's
> > how they can display the file size and the MIME type in the ``save
> > as'' dialog).

> Firefox doesn't show the size of mime type in the save-as dialog box
> for me.

Same here, but it still send a HEAD request before displaying the
dialog box (see the attached trace).  Curiously enough, both requests
are marked uncacheable, which makes the issue you point out even worse.

> Why can't they use a GET request and start downloading in the
> background.

I agree, that's The Right Thing to do in that case.

> The best option would then seem to be that when online a HEAD request
> to WWWOFFLE is a non-cached HEAD request to the end server (unless the
> cached page is new enough not to make the request).

What I've done in Polipo was caching both HEAD and GET requests, and
allowing a cached GET to satisfy a client-side HEAD.

                                        Juliusz

P.S. Here's a trace of what Firefox 0.9.3  (Debian GNU/Linux) does on
     ``save as'':

HEAD /test.bin HTTP/1.1
Host: lanthane.pps.jussieu.fr:1234
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040917 Firefox/0.9.3
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache

HTTP/1.1 200 Okay
Content-Type: application/octet-stream
Content-Length: 123

GET /test.bin HTTP/1.1
Host: lanthane.pps.jussieu.fr:1234
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040917 Firefox/0.9.3
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://www.pps.jussieu.fr/~jch/test.html
Pragma: no-cache
Cache-Control: no-cache