Class ResourceHandler

java.lang.Object
sunlabs.brazil.handler.ResourceHandler
All Implemented Interfaces:
Handler
public class ResourceHandler extends Object implements Handler
Handler for serving documents out of the jar file. Look for url's as resources, presumably in the same "jar" file as the class files. This allows an entire web site to be included in the jar file. A typical way to use this handler (with java 1.2+) is as follows:
  • Add an existing web site to the jar file with: 
    jar uf [jar file] [web site]
  • Create a config file, and add it to the jar file as: sunlabs/brazil/main/config. See Main.java for more info.
  • Create a startup file containing: 
    Main-Class: sunlabs.brazil.server.Main
    , and add it to the manifest with: 
    jar ufm [jar file] [startup file]
  • Start the server with: 
    java -jar [jar file] [optional server options....]

if no suffix is provided, and the "directory" exists, a redirect is issued, to add-on the trailing slash. The following server properties are used:

root
The document root path within the jar file
prefix, suffix, glob, match
Specify the URL that triggers this handler. (See MatchString).
default
The default file name for url references ending in /
mime.xxx
The mime type for suffix xxx. See FileHandler for a description of how to set mime types for url suffixes.
Version:
%V% ResourceHandler.java
Author:
Stephen Uhler

  • Constructor Details

    • ResourceHandler

      public ResourceHandler()

  • Method Details

    • init

      public boolean init(Server server, String prefix)
      Description copied from interface: Handler
      Initializes the handler.
      Specified by:
      init in interface Handler
      Parameters:
      server - The HTTP server that created this Handler. Typical Handlers will use Server.props to obtain run-time configuration information.
      prefix - The handlers name. The string this Handler may prepend to all of the keys that it uses to extract configuration information from Server.props. This is set (by the Server and ChainHandler) to help avoid configuration parameter namespace collisions.
      Returns:
      true if this Handler initialized successfully, false otherwise. If false is returned, this Handler should not be used.

    • respond

      public boolean respond(Request request) throws IOException
      Description copied from interface: Handler
      Responds to an HTTP request.
      Specified by:
      respond in interface Handler
      Parameters:
      request - The Request object that represents the HTTP request.
      Returns:
      true if the request was handled. A request was handled if a response was supplied to the client, typically by calling Request.sendResponse() or Request.sendError.
      Throws:
      IOException - if there was an I/O error while sending the response to the client. Typically, in that case, the Server will (try to) send an error message to the client and then close the client's connection.

      The IOException should not be used to silently ignore problems such as being unable to access some server-side resource (for example getting a FileNotFoundException due to not being able to open a file). In that case, the Handler's duty is to turn that IOException into a HTTP response indicating, in this case, that a file could not be found.

    • getResourceStream

      public static InputStream getResourceStream(Properties props, String prefix, String file) throws IOException
      Look for a file in the filesystem. If its not there, see if we can find a resource in our jar file. Relative paths are resolved with respect to the document root.
      Parameters:
      props - where to look for server root property
      prefix - "
      file - The pseudo file to find as a resource
      Returns:
      The input stream (or null)
      Throws:
      IOException

    • getResourceString

      public static String getResourceString(Properties props, String prefix, String file) throws IOException
      Throws:
      IOException

    • getResourceBytes

      public static byte[] getResourceBytes(Properties props, String prefix, String file) throws IOException
      Find a file blob as a resource in our jar file (experimental).
      Parameters:
      props - where to look for server root property
      prefix - "
      file - The pseudo file to find as a resource
      Returns:
      The data, if available, or raises an exception.
      Throws:
      IOException