David and I have proved that there is
indeed a cache somewhere between him and the eBible.org server.
The same files are now mirrored at ftp://Bible.cx/pub/Scriptures/
for the purpose of giving a one-off chance to bypass the cache
before it clears itself.
On 06/26/2013 02:46 AM, Chris Burrell wrote:
You can check the headers by opening up chrome s
developer tools
On 26 Jun 2013 13:44, "David Haslam" < [email protected]>
wrote:
I'm not consciously using a proxy to access Michael's ftp
directory, but this
description might be a possible explanation somewhere along
the connection.
*FTP caching*
When the proxy is configured to cache requests, it can cache
FTP file
requests as well as HTTP file requests. However, because FTP
files do not
contain the same type of header information as HTTP files,
expiration dates
for cached FTP files are calculated differently than for other
cached files.
When a request is made to the FTP server to retrieve a file,
the proxy first
sends to the FTP server a LIST request for the file to obtain
FTP directory
information about the file. If the FTP server responds to the
LIST request
with a positive completion reply and the directory information
for the file,
the proxy creates an HTTP Last-Modified header with the date
parsed from the
FTP directory information. The caching function of the proxy
then uses this
Last-Modified header, together with the value set in the
CacheLastModifiedFactor directive in the configuration file,
to determine
the length of time that the FTP file remains in the cache
before expiring.
David
--
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