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发信人: Lg (创造人生的传奇), 信区: Linux
标 题: vqServer: A Truly Personal Server
发信站: BBS 荔园晨风站 (Sun Dec 12 15:45:15 1999), 站内信件
Merging Linux and Java on the Server Side
vqServer: A Truly Personal Server
Kevin Reichard
A truly personal Web server, vqServer is designed for individuals and smaller
companies
wishing to serve Web pages from a modest PC.
Installation is a matter of unzipping the downloaded file (you'll need an unzip
program with
Linux; the gzip command found in most Linux distributions will work), placing
the files in the
correct locations, and then launching vqServer from the Java interpreter. When
you're
finished, you've actually installed two servers: an HTTP server on port 80 and
an
administration server on port 9090.
Administering vqServer is a simple affair, performed by connecting your Web
browser to the
Control Centre. This application, which is password protected, oversees
functions like file
locations, aliases, logfiles, hit, authorized users, access control lists, file
types, sessions,
general session settings, the TCP/IP port where the server listens for HTTP
requests (the
default is 8080), and more. Also, you can set the minimum and maximum number of
threads
the server keeps available for handling requests; when you set a minimum number
of
threads you're also enabling thread caching, which improves performance by
decreasing the
overhead associated with creating, maintaining, and destroying threads. This is
where you
can shut down a server, abort all HTTP connections (useful when there are
errant Java
servlets and CGI scripts), or stop all loaded servlets.
The file-handling capabilities in vqServer are noteworthy. Instead of forcing
you to stick
your files into a public directory, vqServer uses aliases to map requests to
actual filenames.
The noteworthy aspect to this is that you can associate actions with specific
filenames: to
send the file, to redirect a request to another location, to run a Java servlet,
or run a CGI
script.
In addition, aliases control who has access to a file, which brings us to a
discussion of
vqServer's security features. vqServer manages access from a list of users and
passwords,
as well as access control lists. When you associate an alias with an access
control list, only
those users listed in the access control list have access to the file.
vqServer keeps track of users on a detailed level: when the users were first
registered and
the last time they accessed your Web server, what ACLs are associated with the
user, and
more.
The emphasis in vqServer, not surprisingly, is on Java servlets, which can be
more efficient
than CGI scripts. The Control Centre in vqServer is a Java servlet, and there
are a few
other example Java servlets included with vqServer. Since vqServer conforms to
version 2.0
of the Sun servlet specification, there shouldn't be too many problems when
running outside
servlets. In addition, vqServer does allow CGI scripts to be run.
You won't ever see a large corporate installation of vqServer: it's simply not
the sort of
feature-rich product that cracks a corporate consciousness. But if you're
looking for a
relatively secure Web server for a personal site--say, if you're running a
small Web site from
your office or departmental computer, chiefly for file-sharing purposes--then
vqServer is
worth checking out.
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