org.ka2ddo.yaac.webserver
Class PathHandler

java.lang.Object
  org.ka2ddo.yaac.webserver.PathHandler

Direct Known Subclasses:

BulletinsPage, FavIcon, FileCopierPage, HistoryPage, IconPage, IndexPage, MapPage, MessagesPage, MonitorWxPage, RobotsTxtPage, StationsPage

public abstract class PathHandler
extends java.lang.Object

This is the generic web page generator class which should be subclassed to produce a particular page.

Field Summary

protected HttpServer	httpServer Reference to HttpServer instance that uses invocations of this PathHandler instance.
static java.lang.String	TEXT_HTML_CHARSET_UTF_8 Predefined constant Content-Type string for HTML.

Constructor Summary

PathHandler()

Method Summary

protected static void	escPrint(java.io.PrintWriter pw, java.lang.String text) This method prints a String to the output PrintWriter, doing HTML escapes for any reserved characters.
HttpServer	getHttpServer() Get the HttpServer instance associated with this PageHandler.
abstract java.lang.String	processPage(HttpConnectionThread hct, java.util.LinkedHashMap<java.lang.String,java.lang.String> requestHeaders, java.io.DataInputStream in, java.io.OutputStream out, java.lang.String path) Given an inbound HTTP request, generate a page using its parameters.
void	setHttpServer(HttpServer httpServer) Set the HttpServer instance associated with this PageHandler.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TEXT_HTML_CHARSET_UTF_8

public static final java.lang.String TEXT_HTML_CHARSET_UTF_8

Predefined constant Content-Type string for HTML.

See Also:

Constant Field Values

httpServer

protected HttpServer httpServer

Reference to HttpServer instance that uses invocations of this PathHandler instance.

Constructor Detail

PathHandler

public PathHandler()

Method Detail

escPrint

protected static void escPrint(java.io.PrintWriter pw,
                               java.lang.String text)

This method prints a String to the output PrintWriter, doing HTML escapes for any reserved characters.

Parameters:

pw - PrintWriter to receive the escaped text

text - String to output with escapes

processPage

public abstract java.lang.String processPage(HttpConnectionThread hct,
                                             java.util.LinkedHashMap<java.lang.String,java.lang.String> requestHeaders,
                                             java.io.DataInputStream in,
                                             java.io.OutputStream out,
                                             java.lang.String path)
                                      throws java.io.IOException

Given an inbound HTTP request, generate a page using its parameters.

Parameters:

hct - HttpConnectionThread issuing the call

requestHeaders - the HTTP request headers the browser sent

in - DataInputStream for reading the body of the HTTP request

out - OutputStream to write the generated page to

path - the remainder of the URL following the prefix identifying this particular page, in case the user is providing parameters to the page

Returns:

the Content-Type header value to return to tell the remote browser how to interpret the page

Throws:

java.io.IOException - if the page could not be generated for some reason

getHttpServer

public HttpServer getHttpServer()

Get the HttpServer instance associated with this PageHandler.

Returns:

HttpServer instance

setHttpServer

public void setHttpServer(HttpServer httpServer)

Set the HttpServer instance associated with this PageHandler. Note that a PageHandler instance cannot be shared between multiple HttpServer instances.

Parameters:

httpServer - HttpServer instance to associate