if file exist

Stephen <ssansom (AT) austin (DOT) rr.com> wrote in
newsQ_ab.55358$834.54901 (AT) twister (DOT) austin.rr.com:

Send a HEAD request for the "cover.jpg" file. In the handler that is
triggered when the response comes back, check for 200 response code &
then make the image visible at that point.

<script language="JavaScript">
var xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlHttp.open("HEAD", "cover.jpg", false);
xmlHttp.send();
document.write(xmlHttp.statusText);
</script>

is that correct to see return code on the browser screen?
i see nothing

http://jibbering.com/2002/4/httprequest.html
it seems, this web page doesn't exist

--
pozdr
zhisol

zhisol wrote:

Stephen <ssansom (AT) austin (DOT) rr.com> wrote in
newsQ_ab.55358$834.54901 (AT) twister (DOT) austin.rr.com:


Send a HEAD request for the "cover.jpg" file. In the handler that is
triggered when the response comes back, check for 200 response code &
then make the image visible at that point.


script language="JavaScript"
var xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlHttp.open("HEAD", "cover.jpg", false);
xmlHttp.send();
document.write(xmlHttp.statusText);
/script

is that correct to see return code on the browser screen?
i see nothing

Should work. Note:

xmlHttp.status should give, e.g., "200"
xmlHttp.statusText should give the associated text, e.g., "OK"

This works for me in my environment, just as you coded it above (except
for substituting an image name I know is on my system).

Server must be configured to allow HEAD requests. Most probably are, but
you'll have to make sure in your case.

You probably also want to check for other possible response codes that
indicate the requested entity is present, e.g., 304.

Regards,
Stephen

http://jibbering.com/2002/4/httprequest.html

it seems, this web page doesn't exist

zhisol wrote:

Stephen <ssansom (AT) austin (DOT) rr.com> wrote in
newsQ_ab.55358$834.54901 (AT) twister (DOT) austin.rr.com:


Send a HEAD request for the "cover.jpg" file. In the handler that is
triggered when the response comes back, check for 200 response code &
then make the image visible at that point.


script language="JavaScript"
var xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlHttp.open("HEAD", "cover.jpg", false);
xmlHttp.send();
document.write(xmlHttp.statusText);
/script

is that correct to see return code on the browser screen?
i see nothing

Should work. Note:

xmlHttp.status should give, e.g., "200"
xmlHttp.statusText should give the associated text, e.g., "OK"

This works for me in my environment, just as you coded it above (except
for substituting an image name I know is on my system).

Server must be configured to allow HEAD requests. Most probably are, but
you'll have to make sure in your case.

You probably also want to check for other possible response codes that
indicate the requested entity is present, e.g., 304.

Regards,
Stephen

P.S.: need document.close() after the document.write(...)?? Or try
alert instead of document.write()...?
S.

http://jibbering.com/2002/4/httprequest.html

it seems, this web page doesn't exist