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jetbrick.web.servlet.utils.ServletUtils Maven / Gradle / Ivy
/**
* Copyright 2013-2014 Guoqiang Chen, Shanghai, China. All rights reserved.
*
* Email: [email protected]
* URL: http://subchen.github.io/
*
* 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 jetbrick.web.servlet.utils;
import java.io.*;
import java.net.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Enumeration;
import javax.servlet.ServletContext;
import javax.servlet.http.*;
import jetbrick.commons.codec.Base64;
import jetbrick.commons.lang.ArrayUtils;
import jetbrick.commons.lang.StringUtils;
import com.alibaba.fastjson.JSONObject;
public abstract class ServletUtils {
public static File getWebroot(ServletContext sc) {
String dir = sc.getRealPath("/");
if (dir == null) {
try {
URL url = sc.getResource("/");
if (url != null && "file".equals(url.getProtocol())) {
dir = URLDecoder.decode(url.getFile(), "utf-8");
}
throw new IllegalStateException("Can't get webroot dir, url = " + url);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
return new File(dir);
}
/**
* 获取相对 ContextPath 的 requestURI
*/
public static String getRequestPathInfo(HttpServletRequest request) {
String path = request.getPathInfo();
if (path == null) {
path = request.getServletPath();
} else {
path = request.getServletPath() + path;
}
if (path == null || path.length() == 0) {
path = "/";
}
return path;
}
public static String getRequestContextFullPath(HttpServletRequest request) {
String schema = request.getScheme();
int port = request.getServerPort();
StringBuilder sb = new StringBuilder();
sb.append(schema);
sb.append("://");
sb.append(request.getServerName());
if (!(port == 80 && "http".equals(schema)) && !(port == 443 && "https".equals(schema))) {
sb.append(':').append(request.getServerPort());
}
sb.append(request.getContextPath());
return sb.toString();
}
public static JSONObject getParametersAsJSON(HttpServletRequest request) {
JSONObject json = new JSONObject();
Enumeration enu = request.getParameterNames();
while (enu.hasMoreElements()) {
String name = enu.nextElement();
String[] value = request.getParameterValues(name);
if (value == null || value.length == 0) {
continue;
}
if (value.length > 1) {
json.put(name, value);
} else {
json.put(name, value[0]);
}
}
return json;
}
public static String getUrlParameters(HttpServletRequest request, String excludeNames) {
StringBuffer sb = new StringBuffer();
String[] excludeNamesArray = StringUtils.split(excludeNames, ',');
Enumeration enu = request.getParameterNames();
while (enu.hasMoreElements()) {
String name = enu.nextElement();
if (ArrayUtils.contains(excludeNamesArray, name)) continue;
String[] value = request.getParameterValues(name);
if (value == null) continue;
for (int i = 0; i < value.length; i++) {
try {
if (sb.length() > 0) sb.append("&");
sb.append(name).append('=').append(URLEncoder.encode(value[i], request.getCharacterEncoding()));
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
}
}
if (sb.length() > 0) sb.insert(0, '?');
sb.insert(0, request.getContextPath() + request.getServletPath());
return sb.toString();
}
public static String getClientIPAddress(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.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("x-real-ip");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
public static void setBufferOff(HttpServletResponse response) {
// Http 1.0 header
response.setHeader("Buffer", "false");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 1L);
// Http 1.1 header
response.setHeader("Cache-Control", "no-cache, no-store, max-age=0");
}
public static void setFileDownloadHeader(HttpServletResponse response, String fileName, String contentType) {
if (contentType == null) contentType = "application/x-download";
response.setContentType(contentType);
// 中文文件名支持
try {
String encodedfileName = new String(fileName.getBytes(), "ISO8859-1");
response.setHeader("Content-Disposition", "attachment; filename=" + encodedfileName);
} catch (UnsupportedEncodingException e) {
}
}
// 是否是Ajax请求数据
public static boolean isAjaxRequest(HttpServletRequest request) {
return "XMLHttpRequest".equals(request.getHeader("X-Requested-With")) || request.getHeader("accept").contains("application/json");
}
// 是否是Pjax请求数据: https://github.com/defunkt/jquery-pjax
public static boolean isPjaxRequest(HttpServletRequest request) {
return StringUtils.isNotEmpty(request.getHeader("X-PJAX"));
}
// 是否是Flash请求数据
public static boolean isFlashRequest(HttpServletRequest request) {
return "Shockwave Flash".equals(request.getHeader("User-Agent")) || StringUtils.isNotEmpty(request.getHeader("x-flash-version"));
}
// 是否是文件上传
public static boolean isMultipartRequest(HttpServletRequest request) {
String type = request.getHeader("Content-Type");
return (type != null) && (type.startsWith("multipart/form-data"));
}
public static boolean isGzipSupported(HttpServletRequest request) {
String browserEncodings = request.getHeader("Accept-Encoding");
return (browserEncodings != null) && (browserEncodings.contains("gzip"));
}
// 判断是否为搜索引擎
public static boolean isRobot(HttpServletRequest request) {
String ua = request.getHeader("user-agent");
if (StringUtils.isBlank(ua)) return false;
//@formatter:off
return (ua != null
&& (ua.indexOf("Baiduspider") != -1
|| ua.indexOf("Googlebot") != -1
|| ua.indexOf("sogou") != -1
|| ua.indexOf("sina") != -1
|| ua.indexOf("iaskspider") != -1
|| ua.indexOf("ia_archiver") != -1
|| ua.indexOf("Sosospider") != -1
|| ua.indexOf("YoudaoBot") != -1
|| ua.indexOf("yahoo") != -1
|| ua.indexOf("yodao") != -1
|| ua.indexOf("MSNBot") != -1
|| ua.indexOf("spider") != -1
|| ua.indexOf("Twiceler") != -1
|| ua.indexOf("Sosoimagespider") != -1
|| ua.indexOf("naver.com/robots") != -1
|| ua.indexOf("Nutch") != -1
|| ua.indexOf("spider") != -1));
}
//@formatter:on
/**
* 客户端对Http Basic验证的 Header进行编码.
*/
public static String encodeHttpBasic(String userName, String password) {
String encode = userName + ":" + password;
return "Basic " + Base64.encodeToString(encode.getBytes());
}
public static String getAuthUsername(HttpServletRequest request) {
String header = request.getHeader("Authorization");
if (header == null) {
return null;
}
String encoded = header.substring(header.indexOf(' ') + 1);
String decoded = Base64.decodeToString(encoded);
return decoded.substring(0, decoded.indexOf(':'));
}
public static String getAuthPassword(HttpServletRequest request) {
String header = request.getHeader("Authorization");
if (header == null) {
return null;
}
String encoded = header.substring(header.indexOf(' ') + 1);
String decoded = Base64.decodeToString(encoded);
return decoded.substring(decoded.indexOf(':') + 1);
}
public static String dump(HttpServletRequest request) {
StringWriter sw = new StringWriter();
PrintWriter out = new PrintWriter(sw);
final String FORMAT = "%20s: %s%n";
final char PADDING_CHAR = '=';
final int PADDING_SIZE = 60;
out.println(StringUtils.center(" Request Basic ", PADDING_SIZE, PADDING_CHAR));
out.printf(FORMAT, "Request Date", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS Z").format(new Date()));
out.printf(FORMAT, "Request URL", request.getRequestURL());
out.printf(FORMAT, "QueryString", request.getQueryString());
out.printf(FORMAT, "Method", request.getMethod());
out.println();
out.printf(FORMAT, "CharacterEncoding", request.getCharacterEncoding());
out.printf(FORMAT, "ContentType", request.getContentType());
out.printf(FORMAT, "ContentLength", request.getContentLength());
out.printf(FORMAT, "Locale", request.getLocale());
out.printf(FORMAT, "RemoteAddr", request.getRemoteAddr());
out.println();
out.println(StringUtils.center(" Request Headers ", PADDING_SIZE, PADDING_CHAR));
Enumeration header = request.getHeaderNames();
while (header.hasMoreElements()) {
String name = header.nextElement();
String value = request.getHeader(name);
out.printf(FORMAT, name, value);
}
out.println();
out.println(StringUtils.center(" Request Parameters ", PADDING_SIZE, PADDING_CHAR));
Enumeration param = request.getParameterNames();
while (param.hasMoreElements()) {
String name = param.nextElement();
String value[] = request.getParameterValues(name);
out.printf(FORMAT, name, StringUtils.join(value, ", "));
}
out.println();
out.println(StringUtils.center(" Request Cookies ", PADDING_SIZE, PADDING_CHAR));
for (Cookie cookie : request.getCookies()) {
out.printf(FORMAT, cookie.getName(), cookie.getValue());
}
out.println();
out.println(StringUtils.repeat(PADDING_CHAR, PADDING_SIZE));
out.flush();
return sw.toString();
}
}
