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/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.glassfish.wasp.runtime;

import java.beans.PropertyEditor;
import java.beans.PropertyEditorManager;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Method;
import java.net.URLEncoder;
import java.util.Enumeration;

import org.glassfish.wasp.WaspException;
import org.glassfish.wasp.compiler.Localizer;

import jakarta.servlet.RequestDispatcher;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.jsp.JspWriter;
import jakarta.servlet.jsp.PageContext;
import jakarta.servlet.jsp.tagext.BodyContent;

/**
 * Bunch of util methods that are used by code generated for useBean, getProperty and setProperty.
 *
 * The __begin, __end stuff is there so that the JSP engine can actually parse this file and inline them if people don't
 * want runtime dependencies on this class. However, I'm not sure if that works so well right now. It got forgotten at
 * some point. -akv
 *
 * @author Mandar Raje
 * @author Shawn Bayern
 */
public class JspRuntimeLibrary {

    private static final String SERVLET_EXCEPTION = "jakarta.servlet.error.exception";
    private static final String JSP_EXCEPTION = "jakarta.servlet.jsp.jspException";

    /**
     * Returns the value of the jakarta.servlet.error.exception request attribute value, if present, otherwise the value of
     * the jakarta.servlet.jsp.jspException request attribute value.
     *
     * This method is called at the beginning of the generated servlet code for a JSP error page, when the "exception"
     * implicit scripting language variable is initialized.
     */
    public static Throwable getThrowable(ServletRequest request) {
        Throwable error = (Throwable) request.getAttribute(SERVLET_EXCEPTION);
        if (error == null) {
            error = (Throwable) request.getAttribute(JSP_EXCEPTION);
            if (error != null) {
                /*
                 * The only place that sets JSP_EXCEPTION is PageContextImpl.handlePageException(). It really should set
                 * SERVLET_EXCEPTION, but that would interfere with the ErrorReportValve. Therefore, if JSP_EXCEPTION is set, we need to
                 * set SERVLET_EXCEPTION.
                 */
                request.setAttribute(SERVLET_EXCEPTION, error);
            }
        }

        return error;
    }

    public static boolean coerceToBoolean(String s) {
        if (s == null || s.length() == 0) {
            return false;
        } else {
            return Boolean.valueOf(s);
        }
    }

    public static byte coerceToByte(String s) {
        if (s == null || s.length() == 0) {
            return (byte) 0;
        } else {
            return Byte.valueOf(s);
        }
    }

    public static char coerceToChar(String s) {
        if (s == null || s.length() == 0) {
            return (char) 0;
        } else {
            // this trick avoids escaping issues
            return s.charAt(0);
        }
    }

    public static double coerceToDouble(String s) {
        if (s == null || s.length() == 0) {
            return 0;
        } else {
            return Double.valueOf(s);
        }
    }

    public static float coerceToFloat(String s) {
        if (s == null || s.length() == 0) {
            return 0;
        } else {
            return Float.valueOf(s);
        }
    }

    public static int coerceToInt(String s) {
        if (s == null || s.length() == 0) {
            return 0;
        } else {
            return Integer.valueOf(s);
        }
    }

    public static short coerceToShort(String s) {
        if (s == null || s.length() == 0) {
            return (short) 0;
        } else {
            return Short.valueOf(s);
        }
    }

    public static long coerceToLong(String s) {
        if (s == null || s.length() == 0) {
            return 0;
        } else {
            return Long.valueOf(s);
        }
    }

    @SuppressWarnings("unchecked")
    public static  T coerce(String s, Class target) {

        boolean isNullOrEmpty = s == null || s.length() == 0;

        if (target == Boolean.class) {
            if (isNullOrEmpty) {
                s = "false";
            }
            return (T) Boolean.valueOf(s);
        } else if (target == Byte.class) {
            if (isNullOrEmpty) {
                return (T) Byte.valueOf((byte) 0);
            } else {
                return (T) Byte.valueOf(s);
            }
        } else if (target == Character.class) {
            if (isNullOrEmpty) {
                return (T) Character.valueOf((char) 0);
            } else {
                return (T) Character.valueOf(s.charAt(0));
            }
        } else if (target == Double.class) {
            if (isNullOrEmpty) {
                return (T) Double.valueOf(0);
            } else {
                return (T) Double.valueOf(s);
            }
        } else if (target == Float.class) {
            if (isNullOrEmpty) {
                return (T) Float.valueOf(0);
            } else {
                return (T) Float.valueOf(s);
            }
        } else if (target == Integer.class) {
            if (isNullOrEmpty) {
                return (T) Integer.valueOf(0);
            } else {
                return (T) Integer.valueOf(s);
            }
        } else if (target == Short.class) {
            if (isNullOrEmpty) {
                return (T) Short.valueOf((short) 0);
            } else {
                return (T) Short.valueOf(s);
            }
        } else if (target == Long.class) {
            if (isNullOrEmpty) {
                return (T) Long.valueOf(0);
            } else {
                return (T) Long.valueOf(s);
            }
        } else if (target.isEnum()) {
            if (isNullOrEmpty) {
                return null;
            }
            return (T) Enum.valueOf((Class) target, s);
        } else {
            return null;
        }
    }

    // __begin convertMethod
    public static Object convert(String propertyName, String s, Class t, Class propertyEditorClass) throws WaspException {
        try {
            if (s == null) {
                if (t.equals(Boolean.class) || t.equals(Boolean.TYPE)) {
                    s = "false";
                } else {
                    return null;
                }
            }
            if (propertyEditorClass != null) {
                return getValueFromBeanInfoPropertyEditor(t, propertyName, s, propertyEditorClass);
            } else if (t.equals(Boolean.class) || t.equals(Boolean.TYPE)) {
                if (s.equalsIgnoreCase("on") || s.equalsIgnoreCase("true")) {
                    return Boolean.TRUE;
                } else {
                    return Boolean.FALSE;
                }
            } else if (t.equals(Byte.class) || t.equals(Byte.TYPE)) {
                return Byte.valueOf(s);
            } else if (t.equals(Character.class) || t.equals(Character.TYPE)) {
                return s.length() > 0 ? Character.valueOf(s.charAt(0)) : null;
            } else if (t.equals(Short.class) || t.equals(Short.TYPE)) {
                return Short.valueOf(s);
            } else if (t.equals(Integer.class) || t.equals(Integer.TYPE)) {
                return Integer.valueOf(s);
            } else if (t.equals(Float.class) || t.equals(Float.TYPE)) {
                return Float.valueOf(s);
            } else if (t.equals(Long.class) || t.equals(Long.TYPE)) {
                return Long.valueOf(s);
            } else if (t.equals(Double.class) || t.equals(Double.TYPE)) {
                return Double.valueOf(s);
            } else if (t.equals(String.class)) {
                return s;
            } else if (t.equals(java.io.File.class)) {
                return new java.io.File(s);
            } else if (t.getName().equals("java.lang.Object")) {
                return new Object[] { s };
            } else {
                return getValueFromPropertyEditorManager(t, propertyName, s);
            }
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }
    // __end convertMethod

    // __begin introspectMethod
    public static void introspect(Object bean, ServletRequest request) throws WaspException {
        Enumeration e = request.getParameterNames();
        while (e.hasMoreElements()) {
            String name = (String) e.nextElement();
            String value = request.getParameter(name);
            introspecthelper(bean, name, value, request, name, true);
        }
    }
    // __end introspectMethod

    // __begin introspecthelperMethod
    public static void introspecthelper(Object bean, String prop, String value, ServletRequest request, String param, boolean ignoreMethodNF)
            throws WaspException {
        Method method = null;
        Class type = null;
        Class propertyEditorClass = null;
        try {
            java.beans.BeanInfo info = java.beans.Introspector.getBeanInfo(bean.getClass());
            if (info != null) {
                java.beans.PropertyDescriptor pd[] = info.getPropertyDescriptors();
                for (int i = 0; i < pd.length; i++) {
                    if (pd[i].getName().equals(prop)) {
                        method = pd[i].getWriteMethod();
                        type = pd[i].getPropertyType();
                        propertyEditorClass = pd[i].getPropertyEditorClass();
                        break;
                    }
                }
            }
            if (method != null) {
                if (type.isArray()) {
                    if (request == null) {
                        throw new WaspException(Localizer.getMessage("jsp.error.beans.setproperty.noindexset"));
                    }
                    Class t = type.getComponentType();
                    String[] values = request.getParameterValues(param);
                    // XXX Please check.
                    if (values == null) {
                        return;
                    }
                    if (t.equals(String.class)) {
                        method.invoke(bean, new Object[] { values });
                    } else {
                        createTypedArray(prop, bean, method, values, t, propertyEditorClass);
                    }
                } else {
                    if (value == null || param != null && value.equals("")) {
                        return;
                    }
                    Object oval = convert(prop, value, type, propertyEditorClass);
                    if (oval != null) {
                        method.invoke(bean, oval);
                    }
                }
            }
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
        if (!ignoreMethodNF && method == null) {
            if (type == null) {
                throw new WaspException(Localizer.getMessage("jsp.error.beans.noproperty", prop, bean.getClass().getName()));
            } else {
                throw new WaspException(Localizer.getMessage("jsp.error.beans.nomethod.setproperty", prop, type.getName(), bean.getClass().getName()));
            }
        }
    }
    // __end introspecthelperMethod

    // -------------------------------------------------------------------
    // functions to convert builtin Java data types to string.
    // -------------------------------------------------------------------
    // __begin toStringMethod
    public static String toString(Object o) {
        return String.valueOf(o);
    }

    public static String toString(byte b) {
        return Byte.toString(b);
    }

    public static String toString(boolean b) {
        return Boolean.toString(b);
    }

    public static String toString(short s) {
        return Short.toString(s);
    }

    public static String toString(int i) {
        return Integer.toString(i);
    }

    public static String toString(float f) {
        return Float.toString(f);
    }

    public static String toString(long l) {
        return Long.toString(l);
    }

    public static String toString(double d) {
        return Double.toString(d);
    }

    public static String toString(char c) {
        return Character.toString(c);
    }
    // __end toStringMethod

    /**
     * Create a typed array. This is a special case where params are passed through the request and the property is indexed.
     */
    public static void createTypedArray(String propertyName, Object bean, Method method, String[] values, Class t, Class propertyEditorClass)
            throws WaspException {

        try {
            if (propertyEditorClass != null) {
                Object[] tmpval = new Integer[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = getValueFromBeanInfoPropertyEditor(t, propertyName, values[i], propertyEditorClass);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(Integer.class)) {
                Integer[] tmpval = new Integer[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Integer.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(Byte.class)) {
                Byte[] tmpval = new Byte[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Byte.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(Boolean.class)) {
                Boolean[] tmpval = new Boolean[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Boolean.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(Short.class)) {
                Short[] tmpval = new Short[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Short.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(Long.class)) {
                Long[] tmpval = new Long[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Long.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(Double.class)) {
                Double[] tmpval = new Double[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Double.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(Float.class)) {
                Float[] tmpval = new Float[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Float.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(Character.class)) {
                Character[] tmpval = new Character[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = values[i].charAt(0);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(int.class)) {
                int[] tmpval = new int[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Integer.parseInt(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(byte.class)) {
                byte[] tmpval = new byte[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Byte.parseByte(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(boolean.class)) {
                boolean[] tmpval = new boolean[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Boolean.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(short.class)) {
                short[] tmpval = new short[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Short.parseShort(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(long.class)) {
                long[] tmpval = new long[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Long.parseLong(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(double.class)) {
                double[] tmpval = new double[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Double.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(float.class)) {
                float[] tmpval = new float[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = Float.valueOf(values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else if (t.equals(char.class)) {
                char[] tmpval = new char[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = values[i].charAt(0);
                }
                method.invoke(bean, new Object[] { tmpval });
            } else {
                Object[] tmpval = new Integer[values.length];
                for (int i = 0; i < values.length; i++) {
                    tmpval[i] = getValueFromPropertyEditorManager(t, propertyName, values[i]);
                }
                method.invoke(bean, new Object[] { tmpval });
            }
        } catch (Exception ex) {
            throw new WaspException("error in invoking method", ex);
        }
    }

    /**
     * Escape special shell characters.
     *
     * @param unescString The string to shell-escape
     * @return The escaped shell string.
     */

    public static String escapeQueryString(String unescString) {
        if (unescString == null) {
            return null;
        }

        String escString = "";
        String shellSpChars = "&;`'\"|*?~<>^()[]{}$\\\n";

        for (int index = 0; index < unescString.length(); index++) {
            char nextChar = unescString.charAt(index);

            if (shellSpChars.indexOf(nextChar) != -1) {
                escString += "\\";
            }

            escString += nextChar;
        }
        return escString;
    }

    // __begin lookupReadMethodMethod
    public static Object handleGetProperty(Object o, String prop) throws WaspException {
        if (o == null) {
            throw new WaspException(Localizer.getMessage("jsp.error.beans.nullbean"));
        }
        Object value = null;
        try {
            Method method = getReadMethod(o.getClass(), prop);
            value = method.invoke(o, (Object[]) null);
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
        return value;
    }
    // __end lookupReadMethodMethod

    // handles  with EL expression for 'value' attribute
    /**
     * Use proprietaryEvaluate public static void handleSetPropertyExpression(Object bean, String prop, String expression,
     * PageContext pageContext, VariableResolver variableResolver, FunctionMapper functionMapper ) throws WaspException {
     * try { Method method = getWriteMethod(bean.getClass(), prop); method.invoke(bean, new Object[] {
     * pageContext.getExpressionEvaluator().evaluate( expression, method.getParameterTypes()[0], variableResolver,
     * functionMapper, null ) }); } catch (Exception ex) { throw new WaspException(ex); } }
     */
    public static void handleSetPropertyExpression(Object bean, String prop, String expression, PageContext pageContext, ProtectedFunctionMapper functionMapper)
            throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, PageContextImpl.evaluateExpression(expression, method.getParameterTypes()[0], pageContext, functionMapper));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, Object value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, value);
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, int value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, Integer.valueOf(value));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, short value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, Short.valueOf(value));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, long value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, Long.valueOf(value));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, double value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, Double.valueOf(value));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, float value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, Float.valueOf(value));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, char value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, Character.valueOf(value));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, byte value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, Byte.valueOf(value));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static void handleSetProperty(Object bean, String prop, boolean value) throws WaspException {
        try {
            Method method = getWriteMethod(bean.getClass(), prop);
            method.invoke(bean, Boolean.valueOf(value));
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
    }

    public static Method getWriteMethod(Class beanClass, String prop) throws WaspException {
        Method method = null;
        Class type = null;
        try {
            java.beans.BeanInfo info = java.beans.Introspector.getBeanInfo(beanClass);
            if (info != null) {
                java.beans.PropertyDescriptor pd[] = info.getPropertyDescriptors();
                for (int i = 0; i < pd.length; i++) {
                    if (pd[i].getName().equals(prop)) {
                        method = pd[i].getWriteMethod();
                        type = pd[i].getPropertyType();
                        break;
                    }
                }
            } else {
                // just in case introspection silently fails.
                throw new WaspException(Localizer.getMessage("jsp.error.beans.nobeaninfo", beanClass.getName()));
            }
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
        if (method == null) {
            if (type == null) {
                throw new WaspException(Localizer.getMessage("jsp.error.beans.noproperty", prop, beanClass.getName()));
            } else {
                throw new WaspException(Localizer.getMessage("jsp.error.beans.nomethod.setproperty", prop, type.getName(), beanClass.getName()));
            }
        }
        return method;
    }

    public static Method getReadMethod(Class beanClass, String prop) throws WaspException {

        Method method = null;
        Class type = null;
        try {
            java.beans.BeanInfo info = java.beans.Introspector.getBeanInfo(beanClass);
            if (info != null) {
                java.beans.PropertyDescriptor pd[] = info.getPropertyDescriptors();
                for (int i = 0; i < pd.length; i++) {
                    if (pd[i].getName().equals(prop)) {
                        method = pd[i].getReadMethod();
                        type = pd[i].getPropertyType();
                        break;
                    }
                }
            } else {
                // just in case introspection silently fails.
                throw new WaspException(Localizer.getMessage("jsp.error.beans.nobeaninfo", beanClass.getName()));
            }
        } catch (Exception ex) {
            throw new WaspException(ex);
        }
        if (method == null) {
            if (type == null) {
                throw new WaspException(Localizer.getMessage("jsp.error.beans.noproperty", prop, beanClass.getName()));
            } else {
                throw new WaspException(Localizer.getMessage("jsp.error.beans.nomethod", prop, beanClass.getName()));
            }
        }

        return method;
    }

    // *********************************************************************
    // PropertyEditor Support

    public static Object getValueFromBeanInfoPropertyEditor(Class attrClass, String attrName, String attrValue, Class propertyEditorClass)
            throws WaspException {
        try {
            PropertyEditor pe = (PropertyEditor) propertyEditorClass.newInstance();
            pe.setAsText(attrValue);
            return pe.getValue();
        } catch (Exception ex) {
            throw new WaspException(Localizer.getMessage("jsp.error.beans.property.conversion", attrValue, attrClass.getName(), attrName, ex.getMessage()));
        }
    }

    public static Object getValueFromPropertyEditorManager(Class attrClass, String attrName, String attrValue) throws WaspException {
        try {
            PropertyEditor propEditor = PropertyEditorManager.findEditor(attrClass);
            if (propEditor != null) {
                propEditor.setAsText(attrValue);
                return propEditor.getValue();
            } else {
                throw new IllegalArgumentException(Localizer.getMessage("jsp.error.beans.propertyeditor.notregistered"));
            }
        } catch (IllegalArgumentException ex) {
            throw new WaspException(Localizer.getMessage("jsp.error.beans.property.conversion", attrValue, attrClass.getName(), attrName, ex.getMessage()));
        }
    }

    // ************************************************************************
    // General Purpose Runtime Methods
    // ************************************************************************

    /**
     * Convert a possibly relative resource path into a context-relative resource path that starts with a '/'.
     *
     * @param request The servlet request we are processing
     * @param relativePath The possibly relative resource path
     */
    public static String getContextRelativePath(ServletRequest request, String relativePath) {

        if (relativePath.startsWith("/")) {
            return relativePath;
        }
        if (!(request instanceof HttpServletRequest)) {
            return relativePath;
        }
        HttpServletRequest hrequest = (HttpServletRequest) request;
        String uri = (String) request.getAttribute("jakarta.servlet.include.servlet_path");
        if (uri != null) {
            String pathInfo = (String) request.getAttribute("jakarta.servlet.include.path_info");
            if ((pathInfo == null) && (uri.lastIndexOf('/') >= 0)) {
                uri = uri.substring(0, uri.lastIndexOf('/'));
            }
        } else {
            uri = hrequest.getServletPath();
            if (uri.lastIndexOf('/') >= 0) {
                uri = uri.substring(0, uri.lastIndexOf('/'));
            }
        }
        return uri + '/' + relativePath;

    }

    /**
     * Perform a RequestDispatcher.include() operation, with optional flushing of the response beforehand.
     *
     * @param request The servlet request we are processing
     * @param response The servlet response we are processing
     * @param relativePath The relative path of the resource to be included
     * @param out The Writer to whom we are currently writing
     * @param flush Should we flush before the include is processed?
     *
     * @exception IOException if thrown by the included servlet
     * @exception ServletException if thrown by the included servlet
     */
    public static void include(ServletRequest request, ServletResponse response, String relativePath, JspWriter out, boolean flush)
            throws IOException, ServletException {

        if (flush && !(out instanceof BodyContent)) {
            out.flush();
        }

        // FIXME - It is tempting to use request.getRequestDispatcher() to
        // resolve a relative path directly, but Catalina currently does not
        // take into account whether the caller is inside a RequestDispatcher
        // include or not. Whether Catalina *should* take that into account
        // is a spec issue currently under review. In the mean time,
        // replicate Wasp's previous behavior

        String resourcePath = getContextRelativePath(request, relativePath);
        RequestDispatcher rd = request.getRequestDispatcher(resourcePath);

        rd.include(request, new ServletResponseWrapperInclude(response, out));
    }

    public static String URLEncode(String s, String enc) {
        if (s == null) {
            return "null";
        }

        if (enc == null) {
            enc = "ISO-8859-1"; // The default request encoding
        }

        try {
            return URLEncoder.encode(s, enc);
        } catch (UnsupportedEncodingException ex) {
        }
        return s;
    }
}




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