<p dir="ltr">You can check the headers by opening up chrome s developer tools<br>
</p>
<div class="gmail_quote">On 26 Jun 2013 13:44, "David Haslam" <<a href="mailto:dfhmch@googlemail.com">dfhmch@googlemail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I'm not consciously using a proxy to access Michael's ftp directory, but this<br>
description might be a possible explanation somewhere along the connection.<br>
<br>
<br>
*FTP caching*<br>
<br>
When the proxy is configured to cache requests, it can cache FTP file<br>
requests as well as HTTP file requests. However, because FTP files do not<br>
contain the same type of header information as HTTP files, expiration dates<br>
for cached FTP files are calculated differently than for other cached files.<br>
<br>
When a request is made to the FTP server to retrieve a file, the proxy first<br>
sends to the FTP server a LIST request for the file to obtain FTP directory<br>
information about the file. If the FTP server responds to the LIST request<br>
with a positive completion reply and the directory information for the file,<br>
the proxy creates an HTTP Last-Modified header with the date parsed from the<br>
FTP directory information. The caching function of the proxy then uses this<br>
Last-Modified header, together with the value set in the<br>
CacheLastModifiedFactor directive in the configuration file, to determine<br>
the length of time that the FTP file remains in the cache before expiring.<br>
<br>
David<br>
<br>
<br>
<br>
<br>
<br>
--<br>
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</blockquote></div>