pi3httpservletrequest.java

mini http server,可以集成嵌入到程序中,实现简单的web功能

     * Returns the name of the scheme used to make this request, 
     * for example,
     * <code>http</code>, <code>https</code>, or <code>ftp</code>.
     * Different schemes have different rules for constructing URLs,
     * as noted in RFC 1738.
     *
     * @return		a <code>String</code> containing the name 
     *			of the scheme used to make this request
     *
     */

    public String getScheme() {
        return "http";
    };
    
    
    

    /**
     * Returns the host name of the server that received the request.
     * For HTTP servlets, same as the value of the CGI variable 
     * <code>SERVER_NAME</code>.
     *
     * @return		a <code>String</code> containing the name 
     *			of the server to which the request was sent
     */

    public String getServerName() {
        return su.getRequestVariable("HostName");
    };
    
    
    

    /**
     * Returns the port number on which this request was received.
     * For HTTP servlets, same as the value of the CGI variable 
     * <code>SERVER_PORT</code>.
     *
     * @return		an integer specifying the port number
     *
     */

    public int getServerPort() {
        String s = su.getRequestVariable("ServerPort");
		if (s != null) {
		    Integer i = new Integer(s);
			if ( i != null) return i.intValue();
        };
		return -1;		  
    };
    
    
    
    /**
     * Retrieves the body of the request as character data using
     * a <code>BufferedReader</code>.  The reader translates the character
     * data according to the character encoding used on the body.
     * Either this method or {@link #getReader} may be called to read the
     * body, not both.
     * 
     *
     * @return					a <code>BufferedReader</code>
     *						containing the body of the request	
     *
     * @exception UnsupportedEncodingException 	if the character set encoding
     * 						used is not supported and the 
     *						text cannot be decoded
     *
     * @exception IllegalStateException   	if {@link #getInputStream} method
     * 						has been called on this request
     *
     * @exception IOException  			if an input or output exception occurred
     *
     * @see 					#getInputStream
     *
     */

    public BufferedReader getReader() throws IOException {
	    if (usedIS) {
            IllegalStateException e = new IllegalStateException();
			throw e;
		}
	    usedBR = true;
        return br;
    };
    
    
    

    /**
     * Returns the Internet Protocol (IP) address of the client 
     * that sent the request.  For HTTP servlets, same as the value of the 
     * CGI variable <code>REMOTE_ADDR</code>.
     *
     * @return		a <code>String</code> containing the 
     *			IP address of the client that sent the request
     *
     */
    
    public String getRemoteAddr() {
        return su.getRequestVariable("RemoteAddr");
    };
    
    
    

    /**
     * Returns the fully qualified name of the client that sent the
     * request, or the IP address of the client if the name cannot be
     * determined. For HTTP servlets, same as the value of the CGI variable 
     * <code>REMOTE_HOST</code>.
     *
     * @return		a <code>String</code> containing the fully qualified name 
     *			of the client
     *
     */

    public String getRemoteHost() {
        return su.getRequestVariable("RemoteHost");
    };
    
    
    

    /**
     *
     * Stores an attribute in this request.
     * Attributes are reset between requests.  This method is most
     * often used in conjunction with {@link RequestDispatcher}.
     *
     * <p>Attribute names should follow the same conventions as
     * package names. Names beginning with <code>java.*</code>,
     * <code>javax.*</code>, and <code>com.sun.*</code>, are
     * reserved for use by Sun Microsystems.
     *
     *
     * @param name			a <code>String</code> specifying 
     *					the name of the attribute
     *
     * @param o				the <code>Object</code> to be stored
     *
     */

    public void setAttribute(String name, Object o) {
	    att.put(name, o);
    };
    
    
    

    /**
     *
     * Removes an attribute from this request.  This method is not
     * generally needed as attributes only persist as long as the request
     * is being handled.
     *
     * <p>Attribute names should follow the same conventions as
     * package names. Names beginning with <code>java.*</code>,
     * <code>javax.*</code>, and <code>com.sun.*</code>, are
     * reserved for use by Sun Microsystems.
     *
     *
     * @param name			a <code>String</code> specifying 
     *					the name of the attribute to remove
     *
     */

    public void removeAttribute(String name) {
	    att.remove(name);
    };
    
    
    

    /**
     *
     * Returns the preferred <code>Locale</code> that the client will 
     * accept content in, based on the Accept-Language header.
     * If the client request doesn't provide an Accept-Language header,
     * this method returns the default locale for the server.
     *
     *
     * @return		the preferred <code>Locale</code> for the client
     *
     */

    public Locale getLocale() {
        return (Locale)su.getLocales().nextElement();
    };
    
    
    

    /**
     *
     * Returns an <code>Enumeration</code> of <code>Locale</code> objects
     * indicating, in decreasing order starting with the preferred locale, the
     * locales that are acceptable to the client based on the Accept-Language
     * header.
     * If the client request doesn't provide an Accept-Language header,
     * this method returns an <code>Enumeration</code> containing one 
     * <code>Locale</code>, the default locale for the server.
     *
     *
     * @return		an <code>Enumeration</code> of preferred 
     *                  <code>Locale</code> objects for the client
     *
     */

    public Enumeration getLocales() {
        return su.getLocales();
    };
    
    
    

    /**
     *
     * Returns a boolean indicating whether this request was made using a
     * secure channel, such as HTTPS.
     *
     *
     * @return		a boolean indicating if the request was made using a
     *                  secure channel
     *
     */

    public boolean isSecure() {
	    String https = su.getRequestVariable("KeySize");
        return (https != null);
    };
    
    
    

    /**
     *
     * Returns a {@link RequestDispatcher} object that acts as a wrapper for
     * the resource located at the given path.  
     * A <code>RequestDispatcher</code> object can be used to forward
     * a request to the resource or to include the resource in a response.
     * The resource can be dynamic or static.
     *
     * <p>The pathname specified may be relative, although it cannot extend
     * outside the current servlet context.  If the path begins with 
     * a "/" it is interpreted as relative to the current context root.  
     * This method returns <code>null</code> if the servlet container
     * cannot return a <code>RequestDispatcher</code>.
     *
     * <p>The difference between this method and {@link
     * Pi3ServletContext#getRequestDispatcher} is that this method can take a
     * relative path.
     *
     * @param path      a <code>String</code> specifying the pathname
     *                  to the resource
     *
     * @return          a <code>RequestDispatcher</code> object
     *                  that acts as a wrapper for the resource
     *                  at the specified path
     *
     * @see             Pi3RequestDispatcher
     * @see             Pi3ServletContext#getRequestDispatcher
     *
     */

    public RequestDispatcher getRequestDispatcher(String path) {
		return new Pi3RequestDispatcher(this, path);
    };
    
    
    

    /**
     * 
     * @deprecated 	As of Version 2.1 of the Java Servlet API,
     * 			use {@link Pi3ServletContext#getRealPath} instead.
     *
     */

    public native String getRealPath(String path);




    /**********************
     * HttpServletRequest *
     **********************/

    /**
     * Returns the name of the authentication scheme used to protect
     * the servlet, for example, "BASIC" or "SSL," or <code>null</code>
     * if the servlet was not protected. 
     *
     * <p>Same as the value of the CGI variable AUTH_TYPE.
     *
     *
     * @return		a <code>String</code> specifying the name of
     *			the authentication scheme, or
     *			<code>null</code> if the request was not
     *			authenticated
     *
     */
   
    public String getAuthType() {
        return su.getResponseVariable("AuthType");
    }
    
   
    

    /**
     *
     * Returns an array containing all of the <code>Cookie</code>
     * objects the client sent with this request.
     * This method returns <code>null</code> if no cookies were sent.
     *
     * @return		an array of all the <code>Cookies</code>
     *			included with this request, or <code>null</code>
     *			if the request has no cookies
     *
     *
     */

    public native Cookie[] getCookies();
    
    
    

    /**
     *
     * Returns the value of the specified request header
     * as a <code>long</code> value that represents a 
     * <code>Date</code> object. Use this method with
     * headers that contain dates, such as
     * <code>If-Modified-Since</code>. 
     *
     * <p>The date is returned as
     * the number of milliseconds since January 1, 1970 GMT.
     * The header name is case insensitive.
     *
     * <p>If the request did not have a header of the
     * specified name, this method returns -1. If the header
     * can't be converted to a date, the method throws
     * an <code>IllegalArgumentException</code>.
     *
     * @param name		a <code>String</code> specifying the
     *				name of the header
     *
     * @return			a <code>long</code> value
     *				representing the date specified
     *				in the header expressed as
     *				the number of milliseconds
     *				since January 1, 1970 GMT,
     *				or -1 if the named header
     *				was not included with the
     *				reqest
     *
     * @exception	IllegalArgumentException	If the header value
     *							can't be converted
     *							to a date
     *
     */

    public long getDateHeader(String name) {
        String s = (String)hdr.get(name);
		if (s != null) {
		    return su.getHttpDate(s);
		} else {
		    return -1;
		}
    }
    
    
    

    /**
     *
     * Returns the value of the specified request header
     * as a <code>String</code>. If the request did not include a header
     * of the specified name, this method returns <code>null</code>.
     * The header name is case insensitive. You can use
     * this method with any request header.
     *
     * @param name		a <code>String</code> specifying the
     *				header name
     *
     * @return			a <code>String</code> containing the
     *				value of the requested
     *				header, or <code>null</code>
     *				if the request does not
     *				have a header of that name
     *
     */			

    public String getHeader(String name) {
		return (String)hdr.get(name);
    }




    /**
     *
     * Returns all the values of the specified request header
     * as an <code>Enumeration</code> of <code>String</code> objects.
     *
     * <p>Some headers, such as <code>Accept-Language</code> can be sent
     * by clients as several headers each with a different value rather than
     * sending the header as a comma separated list.
     *
     * <p>If the request did not include any headers
     * of the specified name, this method returns an empty
     * <code>Enumeration</code>.
     * The header name is case insensitive. You can use
     * this method with any request header.
     *
     * @param name		a <code>String</code> specifying the
     *				header name
     *
     * @return			a <code>Enumeration</code> containing the
     *				values of the requested
     *				header, or <code>null</code>
     *				if the request does not
     *				have any headers of that name
     *
     */			

    public Enumeration getHeaders(String name) {
	    Hashtable h = new Hashtable();
        for (Enumeration e = hdr.keys(); e.hasMoreElements();) {
            String key = (String)e.nextElement();
			if (!key.equalsIgnoreCase(name))  continue;
			h.put(key, hdr.get(key));
        }

		return h.elements();
    }
    
    
    
    
    /**
     *
     * Returns an enumeration of all the header names
     * this request contains. If the request has no
     * headers, this method returns an empty enumeration.