Wilson Wang
狮子的魂
commit
eab6259b13
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#-*- coding:utf-8 -*-
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"""
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" ip2region python seacher client module
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"
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" Author: koma<komazhang@foxmail.com>
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" Date : 2015-11-06
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"""
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import struct, io, socket, sys
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class Ip2Region(object):
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__headerSip = []
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__headerPtr = []
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__f = None
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__sPtr = 0
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__indexLen = 0
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__dbBinStr = ''
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def __init__(self, dbfile):
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self.initDatabase(dbfile)
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def memorySearch(self, ip):
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"""
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" memory search method
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" param: ip
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"""
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if not ip.isdigit(): ip = self.ip2long(ip)
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if self.__dbBinStr == '':
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self.__dbBinStr = self.__f.read() #read all the contents in file
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self.__sPtr = self.getLong(self.__dbBinStr, 0)
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endPtr = self.getLong(self.__dbBinStr, 4)
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self.__indexLen = endPtr - self.__sPtr
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startPtr = self.__sPtr
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indexLen = self.__indexLen
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dbBinStr = self.__dbBinStr
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l, h, mixPtr = (0, int(indexLen/12), 0)
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while l <= h:
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m = int((l+h)/2)
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ptr = startPtr + m*12
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sip = self.getLong(dbBinStr, ptr)
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eip = self.getLong(dbBinStr, ptr+4)
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if ip >= sip:
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if ip > eip:
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l = m + 1
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else:
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mixPtr = self.getLong(dbBinStr, ptr+8)
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break;
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else:
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h = m - 1
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if mixPtr == 0: return "N2"
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return self.returnData(mixPtr)
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def binarySearch(self, ip):
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"""
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" binary search method
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" param: ip
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"""
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if not ip.isdigit(): ip = self.ip2long(ip)
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if self.__indexLen < 1:
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self.__f.seek(0)
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b = self.__f.read(8)
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self.__sPtr = self.getLong(b, 0)
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endPtr = self.getLong(b, 4)
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self.__indexLen = endPtr - self.__sPtr
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startPtr = self.__sPtr
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indexLen = self.__indexLen
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self.__f.seek(startPtr)
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b = self.__f.read(indexLen+12)
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l, h, mixPtr = (0, int(indexLen/12), 0)
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while l <= h:
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m = int((l+h)/2)
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ptr = startPtr + m*12
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self.__f.seek(ptr)
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b = self.__f.read(12)
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sip = self.getLong(b, 0)
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eip = self.getLong(b, 4)
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if ip >= sip:
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if ip > eip:
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l = m + 1
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else:
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mixPtr = self.getLong(b, 8)
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break;
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else:
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h = m - 1
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if mixPtr == 0: return "N2"
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return self.returnData(mixPtr)
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def btreeSearch(self, ip):
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"""
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" b-tree search method
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" param: ip
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"""
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if not ip.isdigit(): ip = self.ip2long(ip)
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if len(self.__headerSip) < 1:
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#pass the super block
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self.__f.seek(8)
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#read the header block
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b = self.__f.read(4086)
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#parse the header block
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sip = None
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ptr = None
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for i in range(0, len(b)-1, 8):
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sip = self.getLong(b, i)
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ptr = self.getLong(b, i+4)
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if ptr == 0:
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break
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self.__headerSip.append(sip)
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self.__headerPtr.append(ptr)
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headerLen = len(self.__headerSip) - 1
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l, h, sptr, eptr = (0, headerLen, 0, 0)
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while l <= h:
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m = int((l+h)/2)
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if ip == self.__headerSip[m]:
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if m > 0:
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sptr = self.__headerPtr[m-1]
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eptr = self.__headerPtr[m]
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break;
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else:
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sptr = self.__headerPtr[m]
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eptr = self.__headerPtr[m+1]
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break;
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if ip > self.__headerSip[m]:
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if m == headerLen:
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sptr = self.__headerPtr[m-1]
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eptr = self.__headerPtr[m]
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break;
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elif ip < self.__headerSip[m+1]:
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sptr = self.__headerPtr[m]
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eptr = self.__headerPtr[m+1]
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break;
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l = m + 1
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else:
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if m == 0:
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sptr = self.__headerPtr[m]
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eptr = self.__headerPtr[m+1]
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break;
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elif ip > self.__headerSip[m-1]:
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sptr = self.__headerPtr[m-1]
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eptr = self.__headerPtr[m]
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break;
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h = m - 1
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if sptr == 0: return "N1"
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indexLen = eptr - sptr
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self.__f.seek(sptr)
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b = self.__f.read(indexLen + 12)
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l, h, mixPtr = (0, int(indexLen/12), 0)
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while l <= h:
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m = int((l+h)/2)
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offset = m * 12
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if ip >= self.getLong(b, offset):
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if ip > self.getLong(b, offset+4):
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l = m + 1
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else:
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mixPtr = self.getLong(b, offset+8)
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break;
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else:
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h = m - 1
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if mixPtr == 0: return "N2"
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return self.returnData(mixPtr)
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def initDatabase(self, dbfile):
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"""
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" initialize the database for search
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" param: dbFile
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"""
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try:
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self.__f = io.open(dbfile, "rb")
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except IOError as e:
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print ("[Error]: ", e)
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sys.exit()
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def returnData(self, dsptr):
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"""
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" get ip data from db file by data start ptr
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" param: dsptr
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"""
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dataPtr = dsptr & 0x00FFFFFF
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dataLen = (dsptr >> 24) & 0xFF
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self.__f.seek(dataPtr)
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data = self.__f.read(dataLen)
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return {
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"city_id": self.getLong(data, 0),
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"region" : data[4:]
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}
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def ip2long(self, ip):
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_ip = socket.inet_aton(ip)
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return struct.unpack("!L", _ip)[0]
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def isip(self, ip):
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p = ip.split(".")
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if len(p) != 4 : return False
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for pp in p:
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if not pp.isdigit() : return False
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if len(pp) > 3 : return False
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if int(pp) > 255 : return False
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return True
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def getLong(self, b, offset):
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if len( b[offset:offset+4] ) == 4:
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return struct.unpack('I', b[offset:offset+4])[0]
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return 0
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def close(self):
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self.__headerSip = None
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self.__headerPtr = None
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self.__f.close()
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self.__f = None
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@ -0,0 +1,79 @@
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#-*- coding:utf-8 -*-
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"""
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" ip2region python seacher client module
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"
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" Autho: koma<komazhang@foxmail.com>
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" Date : 2015-11-06
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"""
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import struct, sys, os, time
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from ip2Region import Ip2Region
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def testSearch():
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"""
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" ip2region test function
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"""
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llen = len(sys.argv)
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if llen < 2:
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print ("Usage: python testSearcher.py [ip2region db file] [alrogrithm]")
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print ("Algorithm: binary or b-tree")
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return 0
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dbFile = sys.argv[1]
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method = 1
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algorithm = "b-tree"
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if (not os.path.isfile(dbFile)) or (not os.path.exists(dbFile)):
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print ("[Error]: Specified db file is not exists.")
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return 0
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if llen > 2:
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algorithm = sys.argv[2]
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if algorithm == "binary":
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method = 2
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elif algorithm == "memory":
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method = 3
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print ("initializing %s..."% algorithm)
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print ("+----------------------------------+")
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print ("| ip2region test program |")
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print ("| Author: chenxin619315@gmail.com. |")
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print ("| Type 'quit' or 'exit' to exit program |")
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print ("+----------------------------------+")
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searcher = Ip2Region(dbFile);
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while True:
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line = input("ip2region>> ")
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line = line.strip()
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if line == "":
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print ("[Error]: Invalid ip address.")
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continue
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if line == "quit" or line == "exit" :
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print ("[Info]: Thanks for your use, Bye.")
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break
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if not searcher.isip(line):
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print ("[Error]: Invalid ip address.")
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continue
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sTime = time.time() * 1000
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if method == 1:
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data = searcher.btreeSearch(line)
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elif method == 2:
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data = searcher.binarySearch(line)
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else:
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data = searcher.memorySearch(line)
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eTime = time.time() * 1000
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if isinstance(data, dict):
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print ("%s|%s in %f millseconds" % (data["city_id"], data["region"].decode('utf-8'), eTime-sTime))
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else:
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print ("[Error]: ", data)
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searcher.close()
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if __name__ == "__main__":
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testSearch()
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