com.bbn.openmap.util.http
Class HttpConnection

java.lang.Object
  java.lang.Thread
      com.bbn.openmap.util.http.HttpConnection

All Implemented Interfaces:

java.lang.Runnable

public class HttpConnection
extends java.lang.Thread

HttpConnection handles the communication with an HTTP client in its own thread. An instance of this class is created by the HttpServer each time a connection is made. The instance exists only long enough to fulfill the request, then dies.

Version:

1.1, 06/17/97

Author:

Tom Mitchell

See Also:

HttpServer

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

protected java.net.Socket	client
static java.lang.String	CONTENT_GEOTIFF
static java.lang.String	CONTENT_GIF
static java.lang.String	CONTENT_HTML
static java.lang.String	CONTENT_JPEG
static java.lang.String	CONTENT_JSON
static java.lang.String	CONTENT_MOV
static java.lang.String	CONTENT_PLAIN
static java.lang.String	CONTENT_PNG
static java.lang.String	CONTENT_PPM
static java.lang.String	CONTENT_SVG
static java.lang.String	CONTENT_TIFF
static java.lang.String	CONTENT_WBMP
static java.lang.String	CONTENT_XML
protected java.io.BufferedReader	in
protected boolean	isConnectionOpen
protected java.io.OutputStream	out
protected HttpServer	server

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

HttpConnection(java.net.Socket client_socket, HttpServer server)
Initialize the input Reader and output Writer and start the connection thread.

Method Summary

void	close() Close the socket connection that we have opened
static java.lang.String[]	getAllContentTypes()
protected void	handlePost()
protected boolean	isEnvarLine(java.lang.String line)
protected void	processGetCommand(java.lang.String cmd) Process a "GET" HTTP command.
protected void	processLine(java.lang.String line) Processes a line of an HTTP request.
protected void	readContent(int length)
protected int	readContentLength(java.lang.String line)
void	run() The running thread simply reads all the lines of input and hands each line off to be parsed.
static void	writeHttpResponse(java.io.OutputStream out, java.lang.String contentType, byte[] response) Write a byte[] response to the OutputStream.
static void	writeHttpResponse(java.io.OutputStream out, java.lang.String contentType, java.lang.String response) Write a String response to the OutputStream.
static void	writeHttpResponseHeader(java.io.Writer out, java.lang.String contentType, int contentLength) Can be used to write the header to an HttpResponse.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

server

protected HttpServer server

client

protected java.net.Socket client

in

protected java.io.BufferedReader in

out

protected java.io.OutputStream out

isConnectionOpen

protected boolean isConnectionOpen

CONTENT_JPEG

public static final java.lang.String CONTENT_JPEG

See Also:

Constant Field Values

CONTENT_GIF

public static final java.lang.String CONTENT_GIF

See Also:

Constant Field Values

CONTENT_PPM

public static final java.lang.String CONTENT_PPM

See Also:

Constant Field Values

CONTENT_PNG

public static final java.lang.String CONTENT_PNG

See Also:

Constant Field Values

CONTENT_TIFF

public static final java.lang.String CONTENT_TIFF

See Also:

Constant Field Values

CONTENT_GEOTIFF

public static final java.lang.String CONTENT_GEOTIFF

See Also:

Constant Field Values

CONTENT_WBMP

public static final java.lang.String CONTENT_WBMP

See Also:

Constant Field Values

CONTENT_SVG

public static final java.lang.String CONTENT_SVG

See Also:

Constant Field Values

CONTENT_HTML

public static final java.lang.String CONTENT_HTML

See Also:

Constant Field Values

CONTENT_MOV

public static final java.lang.String CONTENT_MOV

See Also:

Constant Field Values

CONTENT_PLAIN

public static final java.lang.String CONTENT_PLAIN

See Also:

Constant Field Values

CONTENT_XML

public static final java.lang.String CONTENT_XML

See Also:

Constant Field Values

CONTENT_JSON

public static final java.lang.String CONTENT_JSON

See Also:

Constant Field Values

Constructor Detail

HttpConnection

public HttpConnection(java.net.Socket client_socket,
                      HttpServer server)

Initialize the input Reader and output Writer and start the connection thread.

Parameters:

client_socket - the client's socket

server - the server object

Method Detail

getAllContentTypes

public static java.lang.String[] getAllContentTypes()

run

public void run()

The running thread simply reads all the lines of input and hands each line off to be parsed.

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

processLine

protected void processLine(java.lang.String line)
                    throws java.io.IOException

Processes a line of an HTTP request. The only interesting line we really look at is a GET command, which starts with "GET".

Parameters:

line - one line of an HTTP request

Throws:

java.io.IOException

handlePost

protected void handlePost()
                   throws java.io.IOException

Throws:

java.io.IOException

readContentLength

protected int readContentLength(java.lang.String line)

isEnvarLine

protected boolean isEnvarLine(java.lang.String line)

readContent

protected void readContent(int length)
                    throws java.io.IOException

Throws:

java.io.IOException

processGetCommand

protected void processGetCommand(java.lang.String cmd)
                          throws java.io.IOException

Process a "GET" HTTP command. The leading "GET " and the trailing HTTP version information are stripped off and a HttpRequestEvent is fired via the HttpServer.

Parameters:

cmd - a "GET" HTTP command

Throws:

java.io.IOException

writeHttpResponseHeader

public static void writeHttpResponseHeader(java.io.Writer out,
                                           java.lang.String contentType,
                                           int contentLength)
                                    throws java.io.IOException

Can be used to write the header to an HttpResponse. You need to create a Writer tied to the OutputStream in order to write this text.

Parameters:

out - Writer to place text on the OutputStream.

contentType - the mime type for your response.

contentLength - the byte length of your response.

Throws:

java.io.IOException

writeHttpResponse

public static void writeHttpResponse(java.io.OutputStream out,
                                     java.lang.String contentType,
                                     java.lang.String response)
                              throws java.io.IOException

Write a String response to the OutputStream.

Parameters:

out - the OutputStream of the response.

contentType - the content type of the response.

response - the string containing the response.

Throws:

java.io.IOException

writeHttpResponse

public static void writeHttpResponse(java.io.OutputStream out,
                                     java.lang.String contentType,
                                     byte[] response)
                              throws java.io.IOException

Write a byte[] response to the OutputStream.

Parameters:

out - the OutputStream of the response.

contentType - the content type of the response.

response - the byte array containing the response.

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Close the socket connection that we have opened

Throws:

java.io.IOException