This server was written with two things in mind:
- Compliance with the specifications, and
- Efficiency: High speed & Low memory usage
Every design decision in this project considered these two points.
Below are listed the notable features and
minor restrictions of this server.
There are a number of features that serparate this server from the pack.
- Conditionally HTTP/1.1 compilant.
- Servlet 2.2 compilant (minus some minor things specified in
- Persistent connections.
- Understands the "Chunked" transfer-coding.
- Basic authentication.
- Multiline headers.
- Support for nonstandard HTTP methods.
- URL rewriting for sessions.
- Quoted cookie values.
- Authenticated GET and POST servlets do not require any change to the
code other than changing the superclass from
- Remote server shutdown.
- Servlet reloading.
- Pays attention to
- The author's goal is compilance with the specifications.
This server was designed explicitly for embedded devices. Hence,
there are a few minor restrictions that must be considered and
accounted for in your designs.
Servlet 2.2 Restrictions
- Response buffer size of 0. This means that simply retrieving an
output stream or writer will commit the response.
- No relative URLs permitted in
- The response is not "closed" after
RequestDispatcher.forward, or when the amount of
content specified in the "Content-Length" header has been written to
Except for the case of exceeding the specified content length,
there are no checks performed that catch a servlet writing out
content after these events.
- No JSP.
- Currently only one
ServletContext for all requested paths.
- Must add cookies and sessions before the response is committed.
- Does not pay attention to the time indicated by
A "Retry-After" header is sent during when servicing, but the container
does not wait to recreate the servlet for another request during
javax.servlet.context.tempdir context attribute is
not set if a valid directory is not specified in the
- Any class a servlet uses is a candidate for dynamic classloading,
however, only the servlet class is checked for freshness. In other
words, classes are only reloaded when the servlet class changes.
- When servlet reloading is not enabled, the
method is called on a servlet immediately after a permanent
UnavailableException is detected. This means that the
servlet author should take care to properly synchronize and manage any
resources used during the
- There is a similar note for when the server is shut down. When
servlet reloading is not enabled, the
destroy method is
called immediately, and any threads running in the
method are not given a chance to complete. In other words, the
server defined time limit is zero.
- The "Expect" header is not supported.
- Path parameters are only allowed at the end of a path.
- Persistent connections are not used with the "chunked" transfer