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    java讀取純真IP數據庫QQwry.dat的源代碼


    zhuan(http://www.edongcn.com/blog/article.asp?id=76)
    java讀取純真IP數據庫QQwry.dat的源代碼,要運行此程序必須有
    到網上下載QQwry.da,由于太大,我這里就不提供了。
    一、IPEntry.java
    /** *
    * 一條IP范圍記錄,不僅包括國家和區域,也包括起始IP和結束IP *

    *
    * @author 馬若劼
    */
    public class IPEntry {
        public String beginIp;
        public String endIp;
        public String country;
        public String area;
        
        /**
         * 構造函數
         */
      


    public IPEntry() {
            beginIp = endIp = country = area = "";
        }
        
        public String toString(){
           retur        this.area+"  "+this.country+"IP范圍:"+this.beginIp+"-"+this.endIp;
        }
       }


    二、Utils.java


    /*
    * Created on 2004-8-4
    *
    */


    import java.io.UnsupportedEncodingException;

    /**
    * @author LJ-silver
    */
    public class Utils {
        /**
         * 從ip的字符串形式得到字節數組形式
         * @param ip 字符串形式的ip
         * @return 字節數組形式的ip
         */
        public static byte[] getIpByteArrayFromString(String ip) {
            byte[] ret = new byte[4];
            java.util.StringTokenizer st = new java.util.StringTokenizer(ip, ".");
            try {
                ret[0] = (byte)(Integer.parseInt(st.nextToken()) & 0xFF);
                ret[1] = (byte)(Integer.parseInt(st.nextToken()) & 0xFF);
                ret[2] = (byte)(Integer.parseInt(st.nextToken()) & 0xFF);
                ret[3] = (byte)(Integer.parseInt(st.nextToken()) & 0xFF);
            } catch (Exception e) {
                System.out.println(e.getMessage());
            }
            return ret;
        }
        
        public static void main(String args[]){
             byte[] a=getIpByteArrayFromString(args[0]);
              for(int i=0;i< a.length;i++)
                    System.out.println(a[i]);
              System.out.println(getIpStringFromBytes(a));
        }
        /**
         * 對原始字符串進行編碼轉換,如果失敗,返回原始的字符串
         * @param s 原始字符串
         * @param srcEncoding 源編碼方式
         * @param destEncoding 目標編碼方式
         * @return 轉換編碼后的字符串,失敗返回原始字符串
         */
        public static String getString(String s, String srcEncoding, String destEncoding) {
            try {
                return new String(s.getBytes(srcEncoding), destEncoding);
            } catch (UnsupportedEncodingException e) {
                return s;
            }
        }
        
        /**
         * 根據某種編碼方式將字節數組轉換成字符串
         * @param b 字節數組
         * @param encoding 編碼方式
         * @return 如果encoding不支持,返回一個缺省編碼的字符串
         */
        public static String getString(byte[] b, String encoding) {
            try {
                return new String(b, encoding);
            } catch (UnsupportedEncodingException e) {
                return new String(b);
            }
        }
        
        /**
         * 根據某種編碼方式將字節數組轉換成字符串
         * @param b 字節數組
         * @param offset 要轉換的起始位置
         * @param len 要轉換的長度
         * @param encoding 編碼方式
         * @return 如果encoding不支持,返回一個缺省編碼的字符串
         */
        public static String getString(byte[] b, int offset, int len, String encoding) {
            try {
                return new String(b, offset, len, encoding);
            } catch (UnsupportedEncodingException e) {
                return new String(b, offset, len);
            }
        }
        
        /**
         * @param ip ip的字節數組形式
         * @return 字符串形式的ip
         */
        public static String getIpStringFromBytes(byte[] ip) {
            StringBuffer sb = new StringBuffer();
            sb.append(ip[0] & 0xFF);
            sb.append('.');       
            sb.append(ip[1] & 0xFF);
            sb.append('.');       
            sb.append(ip[2] & 0xFF);
            sb.append('.');       
            sb.append(ip[3] & 0xFF);
            return sb.toString();
        }

    }


    三、IPSeeker.java

    /*
    * LumaQQ - Java QQ Client
    *
    * Copyright (C) 2004 luma < stubma@163.com>
    *
    * This program is free software; you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation; either version 2 of the License, or
    * (at your option) any later version.
    *
    * This program is distributed in the hope that it will be useful,
    * but WITHOUT ANY WARRANTY; without even the implied warranty of
    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    * GNU General Public License for more details.
    *
    * You should have received a copy of the GNU General Public License
    * along with this program; if not, write to the Free Software
    * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    */



    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.RandomAccessFile;
    import java.nio.ByteOrder;
    import java.nio.MappedByteBuffer;
    import java.nio.channels.FileChannel;
    import java.util.ArrayList;
    import java.util.Hashtable;
    import java.util.List;




    /**
    *  * 用來讀取QQwry.dat文件,以根據ip獲得好友位置,QQwry.dat的格式是
    * 一. 文件頭,共8字節
    *        1. 第一個起始IP的絕對偏移, 4字節
    *     2. 最后一個起始IP的絕對偏移, 4字節
    * 二. "結束地址/國家/區域"記錄區
    *     四字節ip地址后跟的每一條記錄分成兩個部分
    *     1. 國家記錄
    *     2. 地區記錄
    *     但是地區記錄是不一定有的。而且國家記錄和地區記錄都有兩種形式
    *     1. 以0結束的字符串
    *     2. 4個字節,一個字節可能為0x1或0x2
    *           a. 為0x1時,表示在絕對偏移后還跟著一個區域的記錄,注意是絕對偏移之后,而不是這四個字節之后
    *        b. 為0x2時,表示在絕對偏移后沒有區域記錄
    *        不管為0x1還是0x2,后三個字節都是實際國家名的文件內絕對偏移
    *           如果是地區記錄,0x1和0x2的含義不明,但是如果出現這兩個字節,也肯定是跟著3個字節偏移,如果不是
    *        則為0結尾字符串
    * 三. "起始地址/結束地址偏移"記錄區
    *     1. 每條記錄7字節,按照起始地址從小到大排列
    *        a. 起始IP地址,4字節
    *        b. 結束ip地址的絕對偏移,3字節
    *
    * 注意,這個文件里的ip地址和所有的偏移量均采用little-endian格式,而java是采用
    * big-endian格式的,要注意轉換
    *
    *
    * @author 馬若劼
    */
    public class IPSeeker {
        /**
         *      * 用來封裝ip相關信息,目前只有兩個字段,ip所在的國家和地區
         *
         *
         * @author 馬若劼
         */
        private class IPLocation {
            public String country;
            public String area;

            public IPLocation() {
                country = area = "";
            }

            public IPLocation getCopy() {
                IPLocation ret = new IPLocation();
                ret.country = country;
                ret.area = area;
                return ret;
            }
        }

        private static final String IP_FILE = IPSeeker.class.getResource("/QQWry.dat").toString().substring(5);

        // 一些固定常量,比如記錄長度等等
        private static final int IP_RECORD_LENGTH = 7;
        private static final byte AREA_FOLLOWED = 0x01;
        private static final byte NO_AREA = 0x2;

        // 用來做為cache,查詢一個ip時首先查看cache,以減少不必要的重復查找
        private Hashtable ipCache;
        // 隨機文件訪問類
        private RandomAccessFile ipFile;
        // 內存映射文件
        private MappedByteBuffer mbb;
        // 單一模式實例
        private static IPSeeker instance = new IPSeeker();
        // 起始地區的開始和結束的絕對偏移
        private long ipBegin, ipEnd;
        // 為提高效率而采用的臨時變量
        private IPLocation loc;
        private byte[] buf;
        private byte[] b4;
        private byte[] b3;

        /**
         * 私有構造函數
         */
        private IPSeeker()  {
            ipCache = new Hashtable();
            loc = new IPLocation();
            buf = new byte[100];
            b4 = new byte[4];
            b3 = new byte[3];
            try {
                ipFile = new RandomAccessFile(IP_FILE, "r");
            } catch (FileNotFoundException e) {
                            System.out.println(IPSeeker.class.getResource("/QQWry.dat").toString());
                            System.out.println(IP_FILE);
                System.out.println("IP地址信息文件沒有找到,IP顯示功能將無法使用");
                ipFile = null;

            }
            // 如果打開文件成功,讀取文件頭信息
            if(ipFile != null) {
                try {
                    ipBegin = readLong4(0);
                    ipEnd = readLong4(4);
                    if(ipBegin == -1 || ipEnd == -1) {
                        ipFile.close();
                        ipFile = null;
                    }
                } catch (IOException e) {
                    System.out.println("IP地址信息文件格式有錯誤,IP顯示功能將無法使用");
                    ipFile = null;
                }
            }
        }

        /**
         * @return 單一實例
         */
        public static IPSeeker getInstance() {
            return instance;
        }

        /**
         * 給定一個地點的不完全名字,得到一系列包含s子串的IP范圍記錄
         * @param s 地點子串
         * @return 包含IPEntry類型的List
         */
        public List getIPEntriesDebug(String s) {
            List ret = new ArrayList();
            long endOffset = ipEnd + 4;
            for(long offset = ipBegin + 4; offset <= endOffset; offset += IP_RECORD_LENGTH) {
                // 讀取結束IP偏移
                long temp = readLong3(offset);
                // 如果temp不等于-1,讀取IP的地點信息
                if(temp != -1) {
                    IPLocation loc = getIPLocation(temp);
                    // 判斷是否這個地點里面包含了s子串,如果包含了,添加這個記錄到List中,如果沒有,繼續
                    if(loc.country.indexOf(s) != -1 || loc.area.indexOf(s) != -1) {
                        IPEntry entry = new IPEntry();
                        entry.country = loc.country;
                        entry.area = loc.area;
                        // 得到起始IP
                        readIP(offset - 4, b4);
                        entry.beginIp = Utils.getIpStringFromBytes(b4);
                        // 得到結束IP
                        readIP(temp, b4);
                        entry.endIp = Utils.getIpStringFromBytes(b4);
                        // 添加該記錄
                        ret.add(entry);
                    }
                }
            }
            return ret;
        }

        /**
         * 給定一個地點的不完全名字,得到一系列包含s子串的IP范圍記錄
         * @param s 地點子串
         * @return 包含IPEntry類型的List
         */
        public List getIPEntries(String s) {
            List ret = new ArrayList();
            try {
                // 映射IP信息文件到內存中
                if(mbb == null) {
                    FileChannel fc = ipFile.getChannel();
                    mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, ipFile.length());
                    mbb.order(ByteOrder.LITTLE_ENDIAN);
                }

                int endOffset = (int)ipEnd;
                for(int offset = (int)ipBegin + 4; offset <= endOffset; offset += IP_RECORD_LENGTH) {
                    int temp = readInt3(offset);
                    if(temp != -1) {
                        IPLocation loc = getIPLocation(temp);
                        // 判斷是否這個地點里面包含了s子串,如果包含了,添加這個記錄到List中,如果沒有,繼續
                        if(loc.country.indexOf(s) != -1 || loc.area.indexOf(s) != -1) {
                            IPEntry entry = new IPEntry();
                            entry.country = loc.country;
                            entry.area = loc.area;
                            // 得到起始IP
                            readIP(offset - 4, b4);
                            entry.beginIp = Utils.getIpStringFromBytes(b4);
                            // 得到結束IP
                            readIP(temp, b4);
                            entry.endIp = Utils.getIpStringFromBytes(b4);
                            // 添加該記錄
                            ret.add(entry);
                        }
                    }
                }
            } catch (IOException e) {
                System.out.println(e.getMessage());
            }
            return ret;
        }

        /**
         * 從內存映射文件的offset位置開始的3個字節讀取一個int
         * @param offset
         * @return
         */
        private int readInt3(int offset) {
            mbb.position(offset);
            return mbb.getInt() & 0x00FFFFFF;
        }

        /**
         * 從內存映射文件的當前位置開始的3個字節讀取一個int
         * @return
         */
        private int readInt3() {
            return mbb.getInt() & 0x00FFFFFF;
        }

        /**
         * 根據IP得到國家名
         * @param ip ip的字節數組形式
         * @return 國家名字符串
         */
        public String getCountry(byte[] ip) {
            // 檢查ip地址文件是否正常
            if(ipFile == null) return "錯誤的IP數據庫文件";
            // 保存ip,轉換ip字節數組為字符串形式
            String ipStr = Utils.getIpStringFromBytes(ip);
            // 先檢查cache中是否已經包含有這個ip的結果,沒有再搜索文件
            if(ipCache.containsKey(ipStr)) {
                IPLocation loc = (IPLocation)ipCache.get(ipStr);
                return loc.country;
            } else {
                IPLocation loc = getIPLocation(ip);
                ipCache.put(ipStr, loc.getCopy());
                return loc.country;
            }
        }

        /**
         * 根據IP得到國家名
         * @param ip IP的字符串形式
         * @return 國家名字符串
         */
        public String getCountry(String ip) {
            return getCountry(Utils.getIpByteArrayFromString(ip));
        }

        /**
         * 根據IP得到地區名
         * @param ip ip的字節數組形式
         * @return 地區名字符串
         */
        public String getArea(byte[] ip) {
            // 檢查ip地址文件是否正常
            if(ipFile == null) return "錯誤的IP數據庫文件";
            // 保存ip,轉換ip字節數組為字符串形式
            String ipStr = Utils.getIpStringFromBytes(ip);
            // 先檢查cache中是否已經包含有這個ip的結果,沒有再搜索文件
            if(ipCache.containsKey(ipStr)) {
                IPLocation loc = (IPLocation)ipCache.get(ipStr);
                return loc.area;
            } else {
                IPLocation loc = getIPLocation(ip);
                ipCache.put(ipStr, loc.getCopy());
                return loc.area;
            }
        }

        /**
         * 根據IP得到地區名
         * @param ip IP的字符串形式
         * @return 地區名字符串
         */
        public String getArea(String ip) {
            return getArea(Utils.getIpByteArrayFromString(ip));
        }

        /**
         * 根據ip搜索ip信息文件,得到IPLocation結構,所搜索的ip參數從類成員ip中得到
         * @param ip 要查詢的IP
         * @return IPLocation結構
         */
        private IPLocation getIPLocation(byte[] ip) {
            IPLocation info = null;
            long offset = locateIP(ip);
            if(offset != -1)
                info = getIPLocation(offset);
            if(info == null) {
                info = new IPLocation();
                info.country = "未知國家";
                info.area = "未知地區";
            }
            return info;
        }

        /**
         * 從offset位置讀取4個字節為一個long,因為java為big-endian格式,所以沒辦法
         * 用了這么一個函數來做轉換
         * @param offset
         * @return 讀取的long值,返回-1表示讀取文件失敗
         */
        private long readLong4(long offset) {
            long ret = 0;
            try {
                ipFile.seek(offset);
                ret |= (ipFile.readByte() & 0xFF);
                ret |= ((ipFile.readByte() << 8) & 0xFF00);
                ret |= ((ipFile.readByte() << 16) & 0xFF0000);
                ret |= ((ipFile.readByte() << 24) & 0xFF000000);
                return ret;
            } catch (IOException e) {
                return -1;
            }
        }

        /**
         * 從offset位置讀取3個字節為一個long,因為java為big-endian格式,所以沒辦法
         * 用了這么一個函數來做轉換
         * @param offset
         * @return 讀取的long值,返回-1表示讀取文件失敗
         */
        private long readLong3(long offset) {
            long ret = 0;
            try {
                ipFile.seek(offset);
                ipFile.readFully(b3);
                ret |= (b3[0] & 0xFF);
                ret |= ((b3[1] << 8) & 0xFF00);
                ret |= ((b3[2] << 16) & 0xFF0000);
                return ret;
            } catch (IOException e) {
                return -1;
            }
        }

        /**
         * 從當前位置讀取3個字節轉換成long
         * @return
         */
        private long readLong3() {
            long ret = 0;
            try {
                ipFile.readFully(b3);
                ret |= (b3[0] & 0xFF);
                ret |= ((b3[1] << 8) & 0xFF00);
                ret |= ((b3[2] << 16) & 0xFF0000);
                return ret;
            } catch (IOException e) {
                return -1;
            }
        }

        /**
         * 從offset位置讀取四個字節的ip地址放入ip數組中,讀取后的ip為big-endian格式,但是
         * 文件中是little-endian形式,將會進行轉換
         * @param offset
         * @param ip
         */
        private void readIP(long offset, byte[] ip) {
            try {
                ipFile.seek(offset);
                ipFile.readFully(ip);
                byte temp = ip[0];
                ip[0] = ip[3];
                ip[3] = temp;
                temp = ip[1];
                ip[1] = ip[2];
                ip[2] = temp;
            } catch (IOException e) {
                System.out.println(e.getMessage());
            }
        }

        /**
         * 從offset位置讀取四個字節的ip地址放入ip數組中,讀取后的ip為big-endian格式,但是
         * 文件中是little-endian形式,將會進行轉換
         * @param offset
         * @param ip
         */
        private void readIP(int offset, byte[] ip) {
            mbb.position(offset);
            mbb.get(ip);
            byte temp = ip[0];
            ip[0] = ip[3];
            ip[3] = temp;
            temp = ip[1];
            ip[1] = ip[2];
            ip[2] = temp;
        }

        /**
         * 把類成員ip和beginIp比較,注意這個beginIp是big-endian的
         * @param ip 要查詢的IP
         * @param beginIp 和被查詢IP相比較的IP
         * @return 相等返回0,ip大于beginIp則返回1,小于返回-1。
         */
        private int compareIP(byte[] ip, byte[] beginIp) {
            for(int i = 0; i < 4; i++) {
                int r = compareByte(ip[i], beginIp[i]);
                if(r != 0)
                    return r;
            }
            return 0;
        }

        /**
         * 把兩個byte當作無符號數進行比較
         * @param b1
         * @param b2
         * @return 若b1大于b2則返回1,相等返回0,小于返回-1
         */
        private int compareByte(byte b1, byte b2) {
            if((b1 & 0xFF) > (b2 & 0xFF)) // 比較是否大于
                return 1;
            else if((b1 ^ b2) == 0)// 判斷是否相等
                return 0;
            else
                return -1;
        }

        /**
         * 這個方法將根據ip的內容,定位到包含這個ip國家地區的記錄處,返回一個絕對偏移
         * 方法使用二分法查找。
         * @param ip 要查詢的IP
         * @return 如果找到了,返回結束IP的偏移,如果沒有找到,返回-1
         */
        private long locateIP(byte[] ip) {
            long m = 0;
            int r;
            // 比較第一個ip項
            readIP(ipBegin, b4);
            r = compareIP(ip, b4);
            if(r == 0) return ipBegin;
            else if(r < 0) return -1;
            // 開始二分搜索
            for(long i = ipBegin, j = ipEnd; i < j; ) {
                m = getMiddleOffset(i, j);
                readIP(m, b4);
                r = compareIP(ip, b4);
                // log.debug(Utils.getIpStringFromBytes(b));
                if(r > 0)
                    i = m;
                else if(r < 0) {
                    if(m == j) {
                        j -= IP_RECORD_LENGTH;
                        m = j;
                    } else
                        j = m;
                } else
                    return readLong3(m + 4);
            }
            // 如果循環結束了,那么i和j必定是相等的,這個記錄為最可能的記錄,但是并非
            //     肯定就是,還要檢查一下,如果是,就返回結束地址區的絕對偏移
            m = readLong3(m + 4);
            readIP(m, b4);
            r = compareIP(ip, b4);
            if(r <= 0) return m;
            else return -1;
        }

        /**
         * 得到begin偏移和end偏移中間位置記錄的偏移
         * @param begin
         * @param end
         * @return
         */
        private long getMiddleOffset(long begin, long end) {
            long records = (end - begin) / IP_RECORD_LENGTH;
            records >>= 1;
            if(records == 0) records = 1;
            return begin + records * IP_RECORD_LENGTH;
        }

        /**
         * 給定一個ip國家地區記錄的偏移,返回一個IPLocation結構
         * @param offset
         * @return
         */
        private IPLocation getIPLocation(long offset) {
            try {
                // 跳過4字節ip
                ipFile.seek(offset + 4);
                // 讀取第一個字節判斷是否標志字節
                byte b = ipFile.readByte();
                if(b == AREA_FOLLOWED) {
                    // 讀取國家偏移
                    long countryOffset = readLong3();
                    // 跳轉至偏移處
                    ipFile.seek(countryOffset);
                    // 再檢查一次標志字節,因為這個時候這個地方仍然可能是個重定向
                    b = ipFile.readByte();
                    if(b == NO_AREA) {
                        loc.country = readString(readLong3());
                        ipFile.seek(countryOffset + 4);
                    } else
                        loc.country = readString(countryOffset);
                    // 讀取地區標志
                    loc.area = readArea(ipFile.getFilePointer());
                } else if(b == NO_AREA) {
                    loc.country = readString(readLong3());
                    loc.area = readArea(offset + 8);
                } else {
                    loc.country = readString(ipFile.getFilePointer() - 1);
                    loc.area = readArea(ipFile.getFilePointer());
                }
                return loc;
            } catch (IOException e) {
                return null;
            }
        }

        /**
         * @param offset
         * @return
         */
        private IPLocation getIPLocation(int offset) {
            // 跳過4字節ip
            mbb.position(offset + 4);
            // 讀取第一個字節判斷是否標志字節
            byte b = mbb.get();
            if(b == AREA_FOLLOWED) {
                // 讀取國家偏移
                int countryOffset = readInt3();
                // 跳轉至偏移處
                mbb.position(countryOffset);
                // 再檢查一次標志字節,因為這個時候這個地方仍然可能是個重定向
                b = mbb.get();
                if(b == NO_AREA) {
                    loc.country = readString(readInt3());
                    mbb.position(countryOffset + 4);
                } else
                    loc.country = readString(countryOffset);
                // 讀取地區標志
                loc.area = readArea(mbb.position());
            } else if(b == NO_AREA) {
                loc.country = readString(readInt3());
                loc.area = readArea(offset + 8);
            } else {
                loc.country = readString(mbb.position() - 1);
                loc.area = readArea(mbb.position());
            }
            return loc;
        }

        /**
         * 從offset偏移開始解析后面的字節,讀出一個地區名
         * @param offset
         * @return 地區名字符串
         * @throws IOException
         */
        private String readArea(long offset) throws IOException {
            ipFile.seek(offset);
            byte b = ipFile.readByte();
            if(b == 0x01 || b == 0x02) {
                long areaOffset = readLong3(offset + 1);
                if(areaOffset == 0)
                    return "未知地區";
                else
                    return readString(areaOffset);
            } else
                return readString(offset);
        }

        /**
         * @param offset
         * @return
         */
        private String readArea(int offset) {
            mbb.position(offset);
            byte b = mbb.get();
            if(b == 0x01 || b == 0x02) {
                int areaOffset = readInt3();
                if(areaOffset == 0)
                    return "未知地區";
                else
                    return readString(areaOffset);
            } else
                return readString(offset);
        }

        /**
         * 從offset偏移處讀取一個以0結束的字符串
         * @param offset
         * @return 讀取的字符串,出錯返回空字符串
         */
        private String readString(long offset) {
            try {
                ipFile.seek(offset);
                int i;
                for(i = 0, buf[i] = ipFile.readByte(); buf[i] != 0; buf[++i] = ipFile.readByte());
                if(i != 0)
                    return Utils.getString(buf, 0, i, "GBK");
            } catch (IOException e) {
                System.out.println(e.getMessage());
            }
            return "";
        }

        /**
         * 從內存映射文件的offset位置得到一個0結尾字符串
         * @param offset
         * @return
         */
        private String readString(int offset) {
            try {
                mbb.position(offset);
                int i;
                for(i = 0, buf[i] = mbb.get(); buf[i] != 0; buf[++i] = mbb.get());
                if(i != 0)
                    return Utils.getString(buf, 0, i, "GBK");
            } catch (IllegalArgumentException e) {
                System.out.println(e.getMessage());
            }
            return "";
        }

        public String getAddress(String ip){
            String country = getCountry(ip).equals(" CZ88.NET")?"":getCountry(ip);
            String area = getArea(ip).equals(" CZ88.NET")?"":getArea(ip);
            String address = country+" "+area;
            return address.trim();
        }
    }

    posted on 2009-04-09 10:58 找個美女做老婆 閱讀(1017) 評論(0)  編輯  收藏


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