Re: How to bulletproof anon FTP downloads?
From: Alun Jones (alun@texis.com)Date: 05/20/02
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From: alun@texis.com (Alun Jones) Date: Mon, 20 May 2002 16:59:14 GMT
In article <ac3r09$4o2$1@reader1.panix.com>, bill <bill02115@hotmail.com>
wrote:
>In <9V6F8.7830$ml4.1924654128@newssvr30.news.prodigy.com> alun@texis.com (Alun
> Jones) writes:
>>In nearly a decade of developing and
>>supporting FTP apps, corruption is most often caused by problems in the
>>program, or by the client forgetting to set "binary" mode ("TYPE I")
>
>Hmm. I've been explicitly setting the mode to "ascii". Should I use
>binary mode, even though I'm downloading ASCII files? How come? Is
>binary mode less error prone?
Not in the least, but since FTP clients and servers are supposed to default to
ASCII mode transfers, it's more common that binary files are corrupted than
the other way around.
A quick (and possibly rude) question - do you mean the same by "ASCII files"
as we do? We're talking about files using the lower 7-bit ASCII character
set, often referred to as "plain text files". I've run into a couple of users
that assume that since their computer uses ASCII codes, that all files
destined for that computer are "ASCII files". A word-processing document, for
instance, while you may think of it as a text file, is usually very much a
binary file, and may get significantly corrupted by the translations of an
ASCII mode transfer.
Alun.
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