pi3httpservletresponse.java

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

     * multiple times to set more than one cookie.
     *
     * @param cookie the Cookie to return to the client
     *
     */

    public void addCookie(Cookie cookie) {
	    su.addCookie(cookie);
	};




    /**
     * Returns a boolean indicating whether the named response header 
     * has already been set.
     * 
     * @param	name	the header name
     * @return		<code>true</code> if the named response header 
     *			has already been set; 
     * 			<code>false</code> otherwise
     */

    public native boolean containsHeader(String name);





    /**
     * Encodes the specified URL by including the session ID in it,
     * or, if encoding is not needed, returns the URL unchanged.
     * The implementation of this method includes the logic to
     * determine whether the session ID needs to be encoded in the URL.
     * For example, if the browser supports cookies, or session
     * tracking is turned off, URL encoding is unnecessary.
     * 
     * <p>For robust session tracking, all URLs emitted by a servlet 
     * should be run through this
     * method.  Otherwise, URL rewriting cannot be used with browsers
     * which do not support cookies.
     *
     * @param	url	the url to be encoded.
     * @return		the encoded URL if encoding is needed;
     * 			the unchanged URL otherwise.
     */

    public String encodeURL(String url) {

        if (useURLRewriting(url)) {
		    url = rewriteURL(url);
		};
		return url;
    }




    /**
     * Encodes the specified URL for use in the
     * <code>sendRedirect</code> method or, if encoding is not needed,
     * returns the URL unchanged.  The implementation of this method
     * includes the logic to determine whether the session ID
     * needs to be encoded in the URL.  Because the rules for making
     * this determination can differ from those used to decide whether to
     * encode a normal link, this method is seperate from the
     * <code>encodeURL</code> method.
     * 
     * <p>All URLs sent to the <code>HttpServletResponse.sendRedirect</code>
     * method should be run through this method.  Otherwise, URL
     * rewriting cannot be used with browsers which do not support
     * cookies.
     *
     * @param	url	the url to be encoded.
     * @return		the encoded URL if encoding is needed;
     * 			the unchanged URL otherwise.
     *
     * @see #sendRedirect
     * @see #encodeUrl
     */

    public String encodeRedirectURL(String url) {

        if (useURLRewriting(url)) {
		    url = rewriteURL(url);
		};
		return url;
    }




    /**
     * @deprecated	As of version 2.1, use encodeURL(String url) instead
     *
     * @param	url	the url to be encoded.
     * @return		the encoded URL if encoding is needed; 
     * 			the unchanged URL otherwise.
     */

    public String encodeUrl(String url) {
        return encodeURL(url);
    }



    
    /**
     * @deprecated	As of version 2.1, use 
     *			encodeRedirectURL(String url) instead
     *
     * @param	url	the url to be encoded.
     * @return		the encoded URL if encoding is needed; 
     * 			the unchanged URL otherwise.
     */

    public String encodeRedirectUrl(String url) {
        return encodeRedirectURL(url);
    }




    /**
     * Sends an error response to the client using the specified status
     * code and descriptive message.  The server generally creates the 
     * response to look like a normal server error page.
     *
     * <p>If the response has already been committed, this method throws 
     * an IllegalStateException.
     * After using this method, the response should be considered
     * to be committed and should not be written to.
     *
     * @param	sc	the error status code
     * @param	msg	the descriptive message
     * @exception	IOException	If an input or output exception occurs
     * @exception	IllegalStateException	If the response was committed
     *						before this method call
     */

    public void sendError(int sc, String msg) throws IOException {
	    try {
		    sendError(sc);
		}
		catch (IOException e)
		{
		    throw e;
		};
	}




    /**
     * Sends an error response to the client using the specified
     * status.  The server generally creates the 
     * response to look like a normal server error page.
     *
     * <p>If the response has already been committed, this method throws 
     * an IllegalStateException.
     * After using this method, the response should be considered
     * to be committed and should not be written to.
     *
     * @param	sc	the error status code
     * @exception	IOException	If an input or output exception occurs
     * @exception	IllegalStateException	If the response was committed
     */

    public void sendError(int sc) throws IOException {
	    if (sout.isCommitted()) {
			IllegalStateException e = new IllegalStateException();
			throw e;
		}
	    try {
			sresult = su.sendError(sc);
			sout.doCommit();
		}
		catch (IOException e)
		{
		    throw e;
		};
	}




    /**
     * Sends a temporary redirect response to the client using the
     * specified redirect location URL.  This method can accept relative URLs;
     * the servlet container will convert the relative URL to an absolute URL
     * before sending the response to the client.
     *
     * <p>If the response has already been committed, this method throws 
     * an IllegalStateException.
     * After using this method, the response should be considered
     * to be committed and should not be written to.
     *
     * @param		location	the redirect location URL
     * @exception	IOException	If an input or output exception occurs
     * @exception	IllegalStateException	If the response was committed
     */

    public void sendRedirect(String location) throws IOException {
		if (sout.isCommitted()) {
			IllegalStateException e = new IllegalStateException();
			throw e;
		}
		su.setResponseVariable("Location", toAbsoluteURL(location));
		setStatus(SC_MOVED_PERMANENTLY);
		sout.sendHeaders();
	}


    
    /**
     * 
     * Sets a response header with the given name and
     * date-value.  The date is specified in terms of
     * milliseconds since the epoch.  If the header had already
     * been set, the new value overwrites the previous one.  The
     * <code>containsHeader</code> method can be used to test for the
     * presence of a header before setting its value.
     * 
     * @param	name	the name of the header to set
     * @param	value	the assigned date value
     * 
     * @see #containsHeader
     * @see #addDateHeader
     */

    public void setDateHeader(String name, long date) {
		su.setResponseVariable(name, su.getHttpDate(date));
    }



    
    /**
     * 
     * Adds a response header with the given name and
     * date-value.  The date is specified in terms of
     * milliseconds since the epoch.  This method allows response headers 
     * to have multiple values.
     * 
     * @param	name	the name of the header to set
     * @param	value	the additional date value
     * 
     * @see #setDateHeader
     */

    public void addDateHeader(String name, long date) {
        su.addResponseVariable(name, su.getHttpDate(date));
    }



    
    /**
     *
     * Sets a response header with the given name and value.
     * If the header had already been set, the new value overwrites the
     * previous one.  The <code>containsHeader</code> method can be
     * used to test for the presence of a header before setting its
     * value.
     * 
     * @param	name	the name of the header
     * @param	value	the header value
     *
     * @see #containsHeader
     * @see #addHeader
     */

    public void setHeader(String name, String value) {
        su.setResponseVariable(name, value);
    }



    
    /**
     * Adds a response header with the given name and value.
     * This method allows response headers to have multiple values.
     * 
     * @param	name	the name of the header
     * @param	value	the additional header value
     *
     * @see #setHeader
     */

    public void addHeader(String name, String value) {
        su.addResponseVariable(name, value);
    }




    /**
     * Sets a response header with the given name and
     * integer value.  If the header had already been set, the new value
     * overwrites the previous one.  The <code>containsHeader</code>
     * method can be used to test for the presence of a header before
     * setting its value.
     *
     * @param	name	the name of the header
     * @param	value	the assigned integer value
     *
     * @see #containsHeader
     * @see #addIntHeader
     */

    public void setIntHeader(String name, int value) {
		Integer i = new Integer(value);
        su.setResponseVariable(name, i.toString());
    }




    /**
     * Adds a response header with the given name and
     * integer value.  This method allows response headers to have multiple
     * values.
     *
     * @param	name	the name of the header
     * @param	value	the assigned integer value
     *
     * @see #setIntHeader
     */

    public void addIntHeader(String name, int value) {
		Integer i = new Integer(value);
        su.addResponseVariable(name, i.toString());

    }



    
    /**
     * Sets the status code for this response.  This method is used to
     * set the return status code when there is no error (for example,
     * for the status codes SC_OK or SC_MOVED_TEMPORARILY).  If there
     * is an error, the <code>sendError</code> method should be used
     * instead.
     *
     * @param	sc	the status code
     *
     * @see #sendError
     */

    public native void setStatus(int sc);



  
    /**
     * @deprecated As of version 2.1, due to ambiguous meaning of the 
     * message parameter. To set a status code 
     * use <code>setStatus(int)</code>, to send an error with a description
     * use <code>sendError(int, String)</code>.
     *
     * Sets the status code and message for this response.
     * 
     * @param	sc	the status code
     * @param	sm	the status message
     */

    public void setStatus(int sc, String sm) {
	    setStatus(sc);
    }

    static {
        System.loadLibrary("Pi3ServletJNI");
    }

}