GA/T 1400协议支持

src/main/java/com/ycwl/basic/utils/IpUtils.java

@@ -0,0 +1,175 @@
+package com.ycwl.basic.utils;
+
+import org.apache.commons.lang3.StringUtils;
+
+import javax.servlet.http.HttpServletRequest;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+/**
+ * 获取IP方法
+ *
+ * @author tsingeye
+ */
+public class IpUtils {
+    /**
+     * 获取客户端IP
+     *
+     * @param request 请求对象
+     * @return IP地址
+     */
+    public static String getIpAddr(HttpServletRequest request) {
+        if (request == null) {
+            return "unknown";
+        }
+        String ip = request.getHeader("x-forwarded-for");
+        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
+            ip = request.getHeader("Proxy-Client-IP");
+        }
+        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
+            ip = request.getHeader("X-Forwarded-For");
+        }
+        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
+            ip = request.getHeader("WL-Proxy-Client-IP");
+        }
+        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
+            ip = request.getHeader("X-Real-IP");
+        }
+
+        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
+            ip = request.getRemoteAddr();
+        }
+
+        return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : getMultistageReverseProxyIp(ip);
+    }
+
+    /**
+     * 将IPv4地址转换成字节
+     *
+     * @param text IPv4地址
+     * @return byte 字节
+     */
+    public static byte[] textToNumericFormatV4(String text) {
+        if (text.length() == 0) {
+            return null;
+        }
+
+        byte[] bytes = new byte[4];
+        String[] elements = text.split("\\." , -1);
+        try {
+            long l;
+            int i;
+            switch (elements.length) {
+                case 1:
+                    l = Long.parseLong(elements[0]);
+                    if ((l < 0L) || (l > 4294967295L)) {
+                        return null;
+                    }
+                    bytes[0] = (byte) (int) (l >> 24 & 0xFF);
+                    bytes[1] = (byte) (int) ((l & 0xFFFFFF) >> 16 & 0xFF);
+                    bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
+                    bytes[3] = (byte) (int) (l & 0xFF);
+                    break;
+                case 2:
+                    l = Integer.parseInt(elements[0]);
+                    if ((l < 0L) || (l > 255L)) {
+                        return null;
+                    }
+                    bytes[0] = (byte) (int) (l & 0xFF);
+                    l = Integer.parseInt(elements[1]);
+                    if ((l < 0L) || (l > 16777215L)) {
+                        return null;
+                    }
+                    bytes[1] = (byte) (int) (l >> 16 & 0xFF);
+                    bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
+                    bytes[3] = (byte) (int) (l & 0xFF);
+                    break;
+                case 3:
+                    for (i = 0; i < 2; ++i) {
+                        l = Integer.parseInt(elements[i]);
+                        if ((l < 0L) || (l > 255L)) {
+                            return null;
+                        }
+                        bytes[i] = (byte) (int) (l & 0xFF);
+                    }
+                    l = Integer.parseInt(elements[2]);
+                    if ((l < 0L) || (l > 65535L)) {
+                        return null;
+                    }
+                    bytes[2] = (byte) (int) (l >> 8 & 0xFF);
+                    bytes[3] = (byte) (int) (l & 0xFF);
+                    break;
+                case 4:
+                    for (i = 0; i < 4; ++i) {
+                        l = Integer.parseInt(elements[i]);
+                        if ((l < 0L) || (l > 255L)) {
+                            return null;
+                        }
+                        bytes[i] = (byte) (int) (l & 0xFF);
+                    }
+                    break;
+                default:
+                    return null;
+            }
+        } catch (NumberFormatException e) {
+            return null;
+        }
+        return bytes;
+    }
+
+    /**
+     * 获取IP地址
+     *
+     * @return 本地IP地址
+     */
+    public static String getHostIp() {
+        try {
+            return InetAddress.getLocalHost().getHostAddress();
+        } catch (UnknownHostException e) {
+        }
+        return "127.0.0.1";
+    }
+
+    /**
+     * 获取主机名
+     *
+     * @return 本地主机名
+     */
+    public static String getHostName() {
+        try {
+            return InetAddress.getLocalHost().getHostName();
+        } catch (UnknownHostException e) {
+        }
+        return "未知";
+    }
+
+    /**
+     * 从多级反向代理中获得第一个非unknown IP地址
+     *
+     * @param ip 获得的IP地址
+     * @return 第一个非unknown IP地址
+     */
+    public static String getMultistageReverseProxyIp(String ip) {
+        // 多级反向代理检测
+        if (ip != null && ip.indexOf(",") > 0) {
+            final String[] ips = ip.trim().split(",");
+            for (String subIp : ips) {
+                if (false == isUnknown(subIp)) {
+                    ip = subIp;
+                    break;
+                }
+            }
+        }
+        return ip;
+    }
+
+    /**
+     * 检测给定字符串是否为未知，多用于检测HTTP请求相关
+     *
+     * @param checkString 被检测的字符串
+     * @return 是否未知
+     */
+    public static boolean isUnknown(String checkString) {
+        return StringUtils.isBlank(checkString) || "unknown".equalsIgnoreCase(checkString);
+    }
+}