Condensing Rewrites

[slipkid]

I am seeking to condense these UA blocks:

RewriteCond %{HTTP_USER_AGENT} ^ImageMobile [OR]
RewriteCond %{HTTP_USER_AGENT} ^ImagePro [OR]
RewriteCond %{HTTP_USER_AGENT} ^ImageSearcher [OR]

to this:

RewriteCond %{HTTP_USER_AGENT} =Image[Mobile|Pro|Searcher] [OR]

without blocking this:

Googlebot-Image/1.0

Am I on the right track?

[not2easy]

The ^ at the beginning isn't going to do the job unless the actual UA begins with Image Mobile. I think you might be looking for

(ImageMobile|ImagePro|ImageSearcher)

without the ^ before it. That would mean "UA contains".

IF that is the only line, you don't need

[OR]

(which means "or").

IF these UAs sometime vary their case as in "imagepro" rather than "ImagePro" you would need to add

 [NC]

(which means "No Case" or "Case insensitive" and adds a little bit of extra work for the server) where the

[OR]

is now.

IF there are multiple lines of UAs and their case varies, then you need

[NC,OR]

[lucy24]

RewriteCond %{HTTP_USER_AGENT} ^ImageMobile [OR]
RewriteCond %{HTTP_USER_AGENT} ^ImagePro [OR]
RewriteCond %{HTTP_USER_AGENT} ^ImageSearcher [OR]

to this:

RewriteCond %{HTTP_USER_AGENT} =Image[Mobile|Pro|Searcher]

Er... You're trying to compress one set of RewriteConds that will not work, to a different set of RewriteConds that will not work?

The first version will always fail because you've got an opening anchor ^ meaning "UA must begin with this text". The second version will fail for two reasons: One, because it begins with = meaning "the following stuff is lexically equal to this literal string" and, two, if you eliminate the = sign, because it's got brackets [ ] instead of parentheses ( ).

There is nothing in the (correct) form
Image(Pro|Mobile|Searcher)
that could possibly match Googlebot-Image, so that's not a concern.

[wilderness]

There are many different UA's you combine into one, and in a similar manners.

In your example one line works for all three:
#begins with Image
RewriteCond %{HTTP_USER_AGENT} ^Image [OR]

The chances that a valid innocent will use the begins with is highly unlikely.

[slipkid]

Thanks for the help. This clears up some misunderstandings I had.