Package javassist.tools.web
Class Webserver
- java.lang.Object
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- javassist.tools.web.Webserver
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- Direct Known Subclasses:
AppletServer
public class Webserver extends Object
A web server for running sample programs.This enables a Java program to instrument class files loaded by web browsers for applets. Since the (standard) security manager does not allow an applet to create and use a class loader, instrumenting class files must be done by this web server.
Note: although this class is included in the Javassist API, it is provided as a sample implementation of the web server using Javassist. Especially, there might be security flaws in this server. Please use this with YOUR OWN RISK.
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Field Summary
Fields Modifier and Type Field Description StringdebugDirIf this field is not null, the class files taken fromClassPoolare written out under the directory specified by this field.StringhtmlfileBaseThe top directory of html (and .gif, .class, ...) files.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description voidaddTranslator(ClassPool cp, Translator t)Adds a translator, which is called whenever a client requests a class file.voiddoReply(InputStream in, OutputStream out, String cmd)Proceses a HTTP request from a client.voidend()Closes the socket.voidlogging(String msg)Prints a log message.voidlogging(String msg1, String msg2)Prints a log message.voidlogging(String msg1, String msg2, String msg3)Prints a log message.voidlogging2(String msg)Prints a log message with indentation.static voidmain(String[] args)Starts a web server.voidrun()Begins the HTTP service.voidsetClassPool(ClassPool loader)Requests the web server to use the specifiedClassPoolobject for obtaining a class file.
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Field Detail
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debugDir
public String debugDir
If this field is not null, the class files taken fromClassPoolare written out under the directory specified by this field. The directory name must not end with a directory separator.
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htmlfileBase
public String htmlfileBase
The top directory of html (and .gif, .class, ...) files. It must end with the directory separator such as "/". (For portability, "/" should be used as the directory separator. Javassist automatically translates "/" into a platform-dependent character.) If this field is null, the top directory is the current one where the JVM is running.If the given URL indicates a class file and the class file is not found under the directory specified by this variable, then
Class.getResourceAsStream()is called for searching the Java class paths.
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Constructor Detail
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Webserver
public Webserver(String port) throws IOException
Constructs a web server.- Parameters:
port- port number- Throws:
IOException
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Webserver
public Webserver(int port) throws IOExceptionConstructs a web server.- Parameters:
port- port number- Throws:
IOException
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Method Detail
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main
public static void main(String[] args) throws IOException
Starts a web server. The port number is specified by the first argument.- Throws:
IOException
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setClassPool
public void setClassPool(ClassPool loader)
Requests the web server to use the specifiedClassPoolobject for obtaining a class file.
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addTranslator
public void addTranslator(ClassPool cp, Translator t) throws NotFoundException, CannotCompileException
Adds a translator, which is called whenever a client requests a class file.- Parameters:
cp- theClassPoolobject for obtaining a class file.t- a translator.- Throws:
NotFoundExceptionCannotCompileException
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end
public void end() throws IOExceptionCloses the socket.- Throws:
IOException
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logging
public void logging(String msg)
Prints a log message.
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logging2
public void logging2(String msg)
Prints a log message with indentation.
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run
public void run()
Begins the HTTP service.
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doReply
public void doReply(InputStream in, OutputStream out, String cmd) throws IOException, BadHttpRequest
Proceses a HTTP request from a client.- Parameters:
out- the output stream to a clientcmd- the command received from a client- Throws:
IOExceptionBadHttpRequest
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