com.handpay.ibenefit.framework.util.WebUtils.java Source code

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Here is the source code for com.handpay.ibenefit.framework.util.WebUtils.java

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/**
 * Copyright (c) 2005-2009 springside.org.cn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *
 * $Id: WebUtils.java 763 2009-12-27 18:36:21Z calvinxiu $
 */
package com.handpay.ibenefit.framework.util;

import java.beans.PropertyDescriptor;
import java.io.IOException;
import java.io.OutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.zip.GZIPOutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.lang3.StringUtils;

public final class WebUtils {

    private static final String DEFAULT_SEARCH_PREFIX = "search_";
    public static final long ONE_YEAR_SECONDS = 60 * 60 * 24 * 365;

    private WebUtils() {
    }

    public static void setExpiresHeader(HttpServletResponse response, long expiresSeconds) {
        // Http 1.0 header
        response.setDateHeader("Expires", System.currentTimeMillis() + expiresSeconds * 1000);
        // Http 1.1 header
        response.setHeader("Cache-Control", "max-age=" + expiresSeconds);
    }

    public static void setNoCacheHeader(HttpServletResponse response) {
        // Http 1.0 header
        response.setDateHeader("Expires", 0);
        // Http 1.1 header
        response.setHeader("Cache-Control", "no-cache");
    }

    public static void setLastModifiedHeader(HttpServletResponse response, long lastModifiedDate) {
        response.setDateHeader("Last-Modified", lastModifiedDate);
    }

    public static void setEtag(HttpServletResponse response, String etag) {
        response.setHeader("ETag", etag);
    }

    public static boolean checkIfModifiedSince(HttpServletRequest request, HttpServletResponse response,
            long lastModified) {
        long ifModifiedSince = request.getDateHeader("If-Modified-Since");
        if ((ifModifiedSince != -1) && (lastModified < ifModifiedSince + 1000)) {
            response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
            return false;
        }
        return true;
    }

    public static boolean checkIfNoneMatchEtag(HttpServletRequest request, HttpServletResponse response,
            String etag) {
        String headerValue = request.getHeader("If-None-Match");
        if (headerValue != null) {
            boolean conditionSatisfied = false;
            if (!"*".equals(headerValue)) {
                StringTokenizer commaTokenizer = new StringTokenizer(headerValue, ",");

                while (!conditionSatisfied && commaTokenizer.hasMoreTokens()) {
                    String currentToken = commaTokenizer.nextToken();
                    if (currentToken.trim().equals(etag)) {
                        conditionSatisfied = true;
                    }
                }
            } else {
                conditionSatisfied = true;
            }

            if (conditionSatisfied) {
                response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
                response.setHeader("ETag", etag);
                return false;
            }
        }
        return true;
    }

    public static boolean checkAccetptGzip(HttpServletRequest request) {
        // Http1.1 header
        String acceptEncoding = request.getHeader("Accept-Encoding");

        if (StringUtils.contains(acceptEncoding, "gzip")) {
            return true;
        } else {
            return false;
        }
    }

    public static OutputStream buildGzipOutputStream(HttpServletResponse response) throws IOException {
        response.setHeader("Content-Encoding", "gzip");
        response.setHeader("Vary", "Accept-Encoding");
        return new GZIPOutputStream(response.getOutputStream());
    }

    public static void setDownloadableHeader(HttpServletResponse response, String fileName) {
        response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");
    }

    @SuppressWarnings("unchecked")
    public static Map<String, Object> getParametersStartingWith(HttpServletRequest request, String prefix) {
        return org.springframework.web.util.WebUtils.getParametersStartingWith(request, prefix);
    }

    public static Map<String, Object> getSearchParameterMap(HttpServletRequest request, Class DomainObjecClass) {
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        Map<String, Object> parameterMap = new HashMap();
        Map requestMap = getParametersStartingWith(request, DEFAULT_SEARCH_PREFIX);
        boolean matchAll = true;
        PropertyDescriptor[] beandesc = PropertyUtils.getPropertyDescriptors(DomainObjecClass);
        for (int i = 0; i < beandesc.length; i++) {
            PropertyDescriptor descriptor = beandesc[i];
            String propertyName = descriptor.getName();
            Class propertyClass = descriptor.getPropertyType();
            if ("class".equals(propertyName)) {
                continue;
            }
            if (propertyClass == Date.class) {
                String after = (String) requestMap.get(propertyName + "After");
                if (after != null && after.trim().length() > 0) {
                    try {
                        Date afterDate = dateFormat.parse(after);
                        parameterMap.put(propertyName + "After", afterDate);
                    } catch (Exception e) {
                    }
                }
                String befor = (String) requestMap.get(propertyName + "Befor");
                if (befor != null && befor.trim().length() > 0) {
                    try {
                        Date beforDate = dateFormat.parse(befor);
                        // to the end of the day
                        long dayTail = beforDate.getTime() + 24 * 3600 * 1000 - 1;
                        parameterMap.put(propertyName + "Befor", new Date(dayTail));
                    } catch (Exception e) {
                    }
                }
            } else if (propertyClass == String.class) {
                String value = (String) requestMap.get(propertyName);
                if (value != null && value.trim().length() > 0) {
                    if (matchAll) {
                        parameterMap.put(propertyName, "%" + value + "%");
                    } else {
                        parameterMap.put(propertyName, value + "%");
                    }
                }
            } else if (propertyClass == Long.class) {
                String value = (String) requestMap.get(propertyName);
                if (value != null && value.trim().length() > 0) {
                    parameterMap.put(propertyName, Long.parseLong(value));
                }
            } else if (propertyClass == Integer.class) {
                String value = (String) requestMap.get(propertyName);
                if (value != null && value.trim().length() > 0) {
                    parameterMap.put(propertyName, Integer.parseInt(value));
                }
            } else if (propertyClass == Double.class) {
                String value = (String) requestMap.get(propertyName);
                if (value != null && value.trim().length() > 0) {
                    parameterMap.put(propertyName, Double.parseDouble(value));
                }
            } else if (propertyClass == Float.class) {
                String value = (String) requestMap.get(propertyName);
                if (value != null && value.trim().length() > 0) {
                    parameterMap.put(propertyName, Float.parseFloat(value));
                }
            } else if (propertyClass == Boolean.class) {
                String value = (String) requestMap.get(propertyName);
                if (value != null && value.trim().length() > 0) {
                    parameterMap.put(propertyName, Boolean.parseBoolean(value));
                }
            }
        }
        return parameterMap;
    }
}