cn.featherfly.web.servlet.ServletUtils Maven / Gradle / Ivy
package cn.featherfly.web.servlet;
import java.util.Enumeration;
import javax.servlet.http.HttpServletRequest;
import cn.featherfly.common.lang.LangUtils;
import cn.featherfly.common.lang.StringUtils;
/**
*
* ServletUtils
*
*
* @author 钟冀
*/
public class ServletUtils {
private static final String XML_HTTP_REQUEST_HEADER_NAME = "X-Requested-With";
private static final String XML_HTTP_REQUEST_HEADER_VALUE = "XMLHttpRequest";
/**
*
* 获取请求客户端IP，剥离代理直接找寻原始地址.
*
* @param request HttpServletRequest
* @return 请求客户端IP
*/
public static String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
/**
*
* 返回请求是否是XMLHttpRequest
*
* @param request HttpServletRequest
* @return 请求是否是XMLHttpRequest
*/
public static boolean isXMLHttpRequest(HttpServletRequest request) {
return XML_HTTP_REQUEST_HEADER_VALUE.equals(
request.getHeader(XML_HTTP_REQUEST_HEADER_NAME));
}
/**
*
* 获取请求参数字符串
*
* @param request request
* @return 请求参数字符串
*/
public static String getParameters(HttpServletRequest request) {
StringBuilder params = new StringBuilder();
Enumeration names = request.getParameterNames();
while(names.hasMoreElements()) {
String name = names.nextElement();
String[] values = request.getParameterValues(name);
if (LangUtils.isNotEmpty(values)) {
for (String value : values) {
params.append(name).append("=").append(value).append("&");
}
}
}
if (params.length() > 0) {
params.deleteCharAt(params.length() - 1);
}
return params.toString();
}
/**
*
* 获取请求相对地址，不包含contextPath
*
* @param request request
* @return 请求相对地址
*/
public static String getRequestURI(HttpServletRequest request) {
if (LangUtils.isEmpty(request)) {
return "";
}
String uri = StringUtils.substringBeforeLast(request.getRequestURI(), ".");
if (!"".equals(request.getContextPath())) {
uri = StringUtils.substringAfter(uri, request.getContextPath());
}
return uri;
}
}