看到一個題目： 從ip.taobao.com中獲取公網ip的信息
分析：
1、生成公網IP地址；
2、根據ip.taobao.com返回的代碼，用json解析 下面是淘寶的接口說明
'''
接口說明
1. 請求接口（GET）：
http://ip.taobao.com/service/getIpInfo.php?ip=[ip地址字串]
2. 響應信息：
（json格式的）國家 、省（自治區或直轄市）、市（縣）、運營商
3. 返回數據格式：
{"code":0,"data":{"ip":"210.75.225.254","country":"\u4e2d\u56fd","area":"\u534e\u5317",
"region":"\u5317\u4eac\u5e02","city":"\u5317\u4eac\u5e02","county":"","isp":"\u7535\u4fe1",
"country_id":"86","area_id":"100000","region_id":"110000","city_id":"110000",
"county_id":"-1","isp_id":"100017"}}
其中code的值的含義爲，0：成功，1：失敗。
'''
======================
下面是我的代碼：
#-*- coding:utf-8 -*-
#! /usr/bin/env python
import urllib,json,time
######################
# create ip address
######################
def create_ip(beginip ,endip ,iptype):
file = open(iptype+'_ipinfo.txt', 'w')
begin = beginip.split('.')
X1 = int(begin[0])
X2 = int(begin[1])
X3 = int(begin[2])
X4 = int(begin[3])
end = endip.split('.')
Y1 = int(end[0])
Y2 = int(end[1])
Y3 = int(end[2])
Y4 = int(end[3])
for X1 in range(X1, Y1):
for X2 in range(X2, Y2):
for X3 in range(X3, Y3):
for X4 in range(X4, Y4):
ip = "%d.%d.%d.%d" % (X1,X2,X3,X4) #計算全球的公網IP地址
################################################################################
# get the info of the ip from ip.taobao.com
# whith url http://ip.taobao.com/service/getIpInfo.php?ip=X.X.X.X
################################################################################
url = 'http://ip.taobao.com/service/getIpInfo.php?ip='+ip
page = urllib.urlopen(url)
time.sleep(0.2) #等待返回數據
alldata = page.read()
page.close()
data = json.loads(alldata)
result = data['code']
info = data['data']
info_ip = info['ip']+','+info['area']+','+info['area_id']+','+info['city']
+','+info['city_id']+','+info['country']+','+info['country_id']+','+info['isp']+','+info['isp_
id']+','+info['region']+','+info['region_id']
info = info_ip.encode("utf-8") #將字符編碼類型轉化爲utf-8
time.sleep(0.2) #由於taobao有查詢限制，要小於10qps,這
裏設置爲5qps
if 'beginip' == 'endip':
file.write(info)
file.close()
elif X4 == 255 :
continue
elif X4 == 0 :
continue
elif X1 > Y1:
print "please input right ip range"
file.close()
break
elif X1 <= Y1:
print info
if result == 0 :
file.write(info + '\n')
else :
continue
else:
file.close()
return
X4 = 0
X3 = 0
X2 = 0
X1 =0
#create the A B C net type ip
create_ip('1.0.0.1','9.255.255.254','A1')
create_ip('11.0.0.1','126.255.255.254','A2')
create_ip('128.0.0.1','169.253.255.254','B1')
create_ip('169.255.0.1','172.15.255.254','B2')
create_ip('172.32.0.1','191.255.255.254','B3')
create_ip('192.0.0.1','192.167.255.254','C1')
create_ip('192.169.0.0','223.255.255.254','C2')但是運行中會報錯，
1.0.0.1,,,,,澳大利亞,AU,,,,
1.0.0.2,,,,,澳大利亞,AU,,,,
1.0.0.3,,,,,澳大利亞,AU,,,,
1.0.0.4,,,,,澳大利亞,AU,,,,
1.0.0.5,,,,,澳大利亞,AU,,,,
1.0.0.6,,,,,澳大利亞,AU,,,,
1.0.0.7,,,,,澳大利亞,AU,,,,
1.0.0.8,,,,,澳大利亞,AU,,,,
1.0.0.9,,,,,澳大利亞,AU,,,,
1.0.0.10,,,,,澳大利亞,AU,,,,
1.0.0.11,,,,,澳大利亞,AU,,,,
1.0.0.12,,,,,澳大利亞,AU,,,,
1.0.0.13,,,,,澳大利亞,AU,,,,
1.0.0.14,,,,,澳大利亞,AU,,,,
1.0.0.15,,,,,澳大利亞,AU,,,,
1.0.0.16,,,,,澳大利亞,AU,,,,
1.0.0.17,,,,,澳大利亞,AU,,,,
1.0.0.18,,,,,澳大利亞,AU,,,,
Traceback (most recent call last):
File "createipandgetinfov5.py", line 77, in <module>
create_ip('1.0.0.1','9.255.255.254','A1')
File "createipandgetinfov5.py", line 40, in create_ip
data = json.loads(alldata)
File "/usr/lib/python2.7/json/__init__.py", line 338, in loads
return _default_decoder.decode(s)
File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python2.7/json/decoder.py", line 384, in raw_decode
raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded想了很多方法不知道是什麼問題，希望大牛們幫忙分析分析！
經過分析是因爲查詢的時候沒有返回正常結果，報502錯， json讀取不到數據報錯。
下一步，加入出錯重啓機制。
請看下篇博客。。。