The easiest and simplest way, since you only have http access to those files.

Write a script and put it there with the files, then you can call that script with file name as a param e.g: getsize.pl?file=somefile.zip.

It will then return the filesize or checksum or both (it's up to you to decide). And you can use LWP to fetch the response automatically

In reply to Re^3: Verify file is there in a remote server by ahmad
in thread Verify file is there in a remote server by Anonymous Monk

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