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com.yqjr.framework.utils.ServletUtil Maven / Gradle / Ivy
package com.yqjr.framework.utils;
import java.io.UnsupportedEncodingException;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.StringTokenizer;
import java.util.TreeMap;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang3.Validate;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import com.yqjr.framework.component.log.Logger;
import com.yqjr.framework.component.shiro.Principal;
/**
*
* ClassName: ServletUtil
* Description: Servlet及Http操作类
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:44:03
* Modified By:
* Modified Date:
* Modified Content:
* Version: 1.0
*
*/
public class ServletUtil {
private static Logger logger = Logger.getLogger();
/**
* 常用数值定义
*/
public static final long ONE_YEAR_SECONDS = 60 * 60 * 24 * 365;
/**
* 静态文件后缀
*/
private final static String[] staticFiles = StringUtils.split(".css,.js,.png,.jpg,.gif,.jpeg,.bmp,.ico,.swf,.psd,.htc,.htm,.html,.crx,.xpi,.exe,.ipa,.apk", ",");
/**
* 动态映射URL后缀
*/
private final static String urlSuffix = ".html";
/**
*
* Description: 设置客户端缓存过期时间 的Header.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:57:19
*
* @param response
* @param expiresSeconds
*/
public static void setExpiresHeader(HttpServletResponse response, long expiresSeconds) {
/**
* Http 1.0 header, set a fix expires date.
*/
response.setDateHeader("Expires", System.currentTimeMillis() + expiresSeconds * 1000);
/**
* Http 1.1 header, set a time after now.
*/
response.setHeader("Cache-Control", "private, max-age=" + expiresSeconds);
}
/**
*
* Description: 设置禁止客户端缓存的Header.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:57:25
*
* @param response
*/
public static void setNoCacheHeader(HttpServletResponse response) {
/**
* Http 1.0 header
*/
response.setDateHeader("Expires",1L);
response.addHeader("PRAGMA", "no-cache");
/**
* Http 1.1 header
*/
response.setHeader("Cache-Control", "no-cache, no-store, max-age=0");
}
/**
*
* Description: 设置LastModified Header.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:58:00
*
* @param response
* @param lastModifiedDate
*/
public static void setLastModifiedHeader(HttpServletResponse response, long lastModifiedDate) {
response.setDateHeader("Last-Modified", lastModifiedDate);
}
/**
*
* Description: 设置Etag Header.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:58:07
*
* @param response
* @param etag
*/
public static void setEtag(HttpServletResponse response, String etag) {
response.setHeader("ETag", etag);
}
/**
*
* Description: 根据浏览器If-Modified-Since Header, 计算文件是否已被修改.如果无修改, checkIfModify返回false ,设置304 not modify status.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:58:15
*
* @param request
* @param response
* @param lastModified 内容的最后修改时间.
* @return
*/
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;
}
/**
*
* Description: 根据浏览器 If-None-Match Header, 计算Etag是否已无效.如果Etag有效, checkIfNoneMatch返回false, 设置304 not modify status.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:58:44
*
* @param request
* @param response
* @param etag 内容的ETag
* @return
*/
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;
}
/**
*
* Description: 设置让浏览器弹出下载对话框的Header.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:59:01
*
* @param response
* @param fileName 下载后的文件名.
*/
public static void setFileDownloadHeader(HttpServletResponse response, String fileName) {
try {
// 中文文件名支持
String encodedfileName = new String(fileName.getBytes(), "ISO8859-1");
response.setHeader("Content-Disposition", "attachment; filename=\"" + encodedfileName + "\"");
} catch (UnsupportedEncodingException e) {
e.getMessage();
}
}
/**
*
* Description: TODO
* Create By: Wanglei
* Create Date: 2017年5月12日 下午3:59:13
*
* @param request
* @param prefix
* @return
*/
@SuppressWarnings("rawtypes")
public static Map getParametersStartingWith(ServletRequest request, String prefix) {
Validate.notNull(request, "Request must not be null");
Enumeration paramNames = request.getParameterNames();
Map params = new TreeMap();
String pre = prefix;
if (pre == null) {
pre = "";
}
while (paramNames != null && paramNames.hasMoreElements()) {
String paramName = (String) paramNames.nextElement();
if ("".equals(pre) || paramName.startsWith(pre)) {
String unprefixed = paramName.substring(pre.length());
String[] values = request.getParameterValues(paramName);
if (values == null || values.length == 0) {
values = new String[]{};
// Do nothing, no values found at all.
} else if (values.length > 1) {
params.put(unprefixed, values);
} else {
params.put(unprefixed, values[0]);
}
}
}
return params;
}
/**
*
* Description: 组合Parameters生成Query String的Parameter部分,并在paramter name上加上prefix.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午4:00:11
*
* @param params
* @param prefix
* @return
*/
public static String encodeParameterStringWithPrefix(Map params, String prefix) {
StringBuilder queryStringBuilder = new StringBuilder();
String pre = prefix;
if (pre == null) {
pre = "";
}
Iterator> it = params.entrySet().iterator();
while (it.hasNext()) {
Entry entry = it.next();
queryStringBuilder.append(pre).append(entry.getKey()).append("=").append(entry.getValue());
if (it.hasNext()) {
queryStringBuilder.append("&");
}
}
return queryStringBuilder.toString();
}
/**
*
* Description: 客户端对Http Basic验证的 Header进行编码.
* Create By: Wanglei
* Create Date: 2017年5月12日 下午4:00:23
*
* @param userName
* @param password
* @return
*/
public static String encodeHttpBasic(String userName, String password) {
String encode = userName + ":" + password;
return "Basic " + Encodes.encodeBase64(encode.getBytes());
}
/**
*
* Description: 是否是Ajax异步请求
* Create By: Wanglei
* Create Date: 2017年5月12日 下午4:00:33
*
* @param request
* @return
*/
public static boolean isAjaxRequest(HttpServletRequest request){
String accept = request.getHeader("accept");
String xRequestedWith = request.getHeader("X-Requested-With");
Principal principal = UserUtils.getPrincipal();
// 如果是异步请求或是手机端,则直接返回信息
return ((accept != null && accept.indexOf("application/json") != -1
|| (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1)
|| (principal != null && principal.isMobileLogin())));
}
/**
*
* Description: 获取当前请求对象
* Create By: Wanglei
* Create Date: 2017年5月12日 下午4:00:43
*
* @return
*/
public static HttpServletRequest getRequest(){
try{
return ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
}catch(Exception e){
return null;
}
}
/**
*
* Description: 判断访问URI是否是静态文件请求
* Create By: Wanglei
* Create Date: 2017年5月12日 下午4:00:51
*
* @param uri
* @return
*/
public static boolean isStaticFile(String uri){
if (staticFiles == null){
try {
throw new Exception("检测到“app.properties”中没有配置“web.staticFile”属性。配置示例:\n#静态文件后缀\n"
+"web.staticFile=.css,.js,.png,.jpg,.gif,.jpeg,.bmp,.ico,.swf,.psd,.htc,.crx,.xpi,.exe,.ipa,.apk");
} catch (Exception e) {
logger.error(e.getMessage(),e);
}
}
// if ((StringUtils.startsWith(uri, "/static/") || StringUtils.endsWithAny(uri, sfs))
// && !StringUtils.endsWithAny(uri, ".jsp") && !StringUtils.endsWithAny(uri, ".java")){
// return true;
// }
if (StringUtils.endsWithAny(uri, staticFiles) && !StringUtils.endsWithAny(uri, urlSuffix)
&& !StringUtils.endsWithAny(uri, ".jsp") && !StringUtils.endsWithAny(uri, ".java")){
return true;
}
return false;
}
}