IBM Tivoli Access Manager for e-business: WebSEAL Administration ...

The
compression_level
is
an
optional
setting
that
specifies
a
data
compression
level.
Valid
values
are
integers
between
1
and
9.
The
larger
the
integer,
the
greater
the
amount
of
compression
that
takes
place.
Note
that
the
greater
the
amount
of
compression,
the
greater
the
load
placed
on
the
CPU.
The
value
of
increased
compression
must
be
weighed
against
any
performance
impacts.
When
the
compression_level
is
not
specified,
a
default
level
of
1
is
used.
The
following
example
compresses
all
documents
of
size
greater
than
1000
bytes:
[compress-mime-type]
*/*
=
1000
The
following
set
of
entries
disables
compression
for
all
images,
disables
compression
for
CSS
files,
enables
compression
at
level
5
for
all
PDF
documents,
enables
compression
for
HTML
documents
of
size
greater
than
2000
bytes,
and
enables
compression
for
all
other
text
documents,
regardless
of
size:
[compress-mime-type]
image/*
=
-1
text/css
=
-1
application/pdf
=
0:5
text/html
=
2000
text/*
=
0
Compression
based
on
user
agent
type
WebSEAL
returns
compressed
data
to
user
agents
that
request
compressed
data.
WebSEAL
does
not
return
compressed
data
to
user
agents
that
do
not
request
it.
However,
some
user
agents
request
compressed
data
but
do
not
know
how
to
handle
the
data
properly.
WebSEAL
administrators
can
use
the
WebSEAL
configuration
file
to
explicitly
enable
or
disable
compression
for
various
browsers.
The
configuration
file
entry
syntax
is:
[compress-user-agents]
user_agent_pattern
=
{yes|no}
The
user_agent_pattern
consists
of
wildcard
patterns
that
match
characters
found
in
the
user-agent
header
sent
to
WebSEAL.
The
value
yes
means
to
compress
data
that
is
returned
to
the
browser.
The
value
no
means
to
return
the
data
uncompressed.
When
the
user-agent
header
does
not
match
any
of
the
stanza
entries
in
the
WebSEAL
configuration
file,
WebSEAL
honors
the
accept-encoding
header
sent
by
the
browser.
For
example,
the
following
entry
enables
compression
for
Internet
Explorer
6,
but
disables
compression
for
all
other
browsers:
[compress-user-agents]
*MSIE
6.0"
=
yes
*
=
no
The
following
example
disables
compression
for
Netscape
4
but
allows
other
browsers
to
receive
compressed
data.
Note
that
the
entry
*MSIE*
is
necessary
because
the
user-agent
header
sent
by
Internet
Explorer
begins
with
Mozilla:
[compress-user-agents]
*MSIE*
=
yes
Mozilla/4.*
=
no
Chapter
3.
WebSEAL
server
administration
81