[analog-help] Escaping Quotes in Logs
Roberto Hoyle
roberto.j.hoyle at Dartmouth.EDU
Wed Feb 27 09:42:20 PST 2008
On Feb 26, 2008, at 8:10 PM, Jeremy Wadsack wrote:
> The format for these parameters is not typical for a web log. Usually
> the query string is URL-escaped. In that case quote characters are
> converted to their hex equivalent. In your example I would expect
> something more like this:
>
> F%2E+Scott+Fitzgerald%27s+evolving+American+dream:+the+
> %22pursuit+of+happiness%22+in+Gatsby%2C+Tender+is+the+night
>
> In this case Analog can parse the file just fine. For your files you
> will probably need to pre-process the lines to convert them to
> something
> Analog can support.
From the Apache 2.2 documentation:
Some Notes
For security reasons, starting with version 2.0.46, non-printable and
other special characters in %r, %i and %o are escaped using \xhh
sequences, where hh stands for the hexadecimal representation of the
raw byte. Exceptions from this rule are " and \, which are escaped by
prepending a backslash, and all whitespace characters, which are
written in their C-style notation (\n, \t, etc). In versions prior to
2.0.46, no escaping was performed on these strings so you had to be
quite careful when dealing with raw log files.
So, for Apache, at least, what I'm seeing is expected behavior.
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