On Mon, 16 Dec 2002, Zvi Har'El wrote:

> curl -i -z "`date -r aaa`" http://host/path
>
> doesn't issue an if-modified-since request and always returns the file.
> Since the date expression generated by the date -r (or date --reference)
> command is completely legal, I suspect there is a bug here.

I can't make this not work.

I ran this command line with curl 7.9.9 and a curl 7.10.3-pre version:

$ touch aaaa
$ curl -vi -z "`date -r aaaa`" http://127.0.0.1/
[snip]

They both sent a header like this:

If-Modified-Since: Wed, 18 Dec 2002 07:58:23 GMT

and in fact, both command lines get a 304 "Not Modified" back from the
server.

> Parenthetically, there is a problem also in the "works fine" case: if you
> don't specify -i, you get nothing, not even an error return!!!

Curl doesn't return errors like that and using -z makes it no different. If
you really need to, use -w and get the http code returned, or use -i and
figure it out yourself.

-- 
 Daniel Stenberg -- curl, cURL, Curl, CURL. Groks URLs.
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