百度图片爬虫-python版
1 #coding:utf-8
2
3 """
4
5 Created on 2015-9-17
6
7
8
9 @author: huangxie
10
11 """
12
13 import time,math,os,re,urllib,urllib2,cookielib
14
15 from bs4 import BeautifulSoup
16
17 import time
18
19 import re
20
21 import uuid
22
23 import json
24
25 from threading import Thread
26
27 from Queue import Queue
28
29 import MySQLdb as mdb
30
31 import sys
32
33 import threading
34
35 import utils
36
37 import imitate_browser
38
39 from MySQLdb.constants.REFRESH import STATUS
40
41 reload(sys)
42
43 sys.setdefaultencoding('utf-8')
44
45
46
47 DB_HOST = '127.0.0.1'
48
49 DB_USER = 'root'
50
51 DB_PASS = 'root'
52
53 proxy = {u'http':u'222.39.64.13:8118'}
54
55 TOP_URL="http://image.baidu.com/i?tn=resultjsonavatarnew&ie=utf-8&word={word}&pn={pn}&rn={rn}"
56
57 KEYWORD_URL="https://www.baidu.com/s?ie=utf-8&f=8&tn=baidu&wd={wd}"
58
59
60
61 """
62
63 i_headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11',
64
65 'Accept':'json;q=0.9,*/*;q=0.8',
66
67 'Accept-Charset':'utf-8;q=0.7,*;q=0.3',
68
69 'Accept-Encoding':'gzip',
70
71 'Connection':'close',
72
73 'Referer':None #注意如果依然不能抓取的话，这里可以设置抓取网站的host
74
75 }
76
77 """
78
79 i_headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.48'}
80
81
82
83 def GetDateString():
84
85 x = time.localtime(time.time())
86
87 foldername = str(x.__getattribute__("tm_year"))+"-"+str(x.__getattribute__("tm_mon"))+"-"+str(x.__getattribute__("tm_mday"))
88
89 return foldername
90
91
92
93 class BaiduImage(threading.Thread):
94
95
96
97 def __init__(self):
98
99 Thread.__init__(self)
self.browser=imitate_browser.BrowserBase()
self.chance=0
self.chance1=0
self.request_queue=Queue()
self.wait_ana_queue=Queue()
#self.key_word_queue.put((("动态图", 0, 24)))
self.count=0
self.mutex = threading.RLock() #可重入锁，使单线程可以再次获得已经获得的锁
self.commit_count=0
self.ID=500
self.next_proxy_set = set()
self.dbconn = mdb.connect(DB_HOST, DB_USER, DB_PASS, 'sosogif', charset='utf8')
self.dbconn.autocommit(False)
self.dbcurr = self.dbconn.cursor()
self.dbcurr.execute('SET NAMES utf8')
"""
def run(self):
while True:
self.get_pic()
"""
def work(self,item):
print "start thread",item
while True: #MAX_REQUEST条以上则等待
self.get_pic()
self.prepare_request()
def format_keyword_url(self,keyword):
return KEYWORD_URL.format(wd=keyword).encode('utf-8')
def generateSeed(self,url):
html = self.browser.openurl(url).read()
if html:
try:
soup = BeautifulSoup(html)
trs = soup.find('div', id='rs').find('table').find_all('tr') #获得所有行
for tr in trs:
ths=tr.find_all('th')
for th in ths:
a=th.find_all('a')[0]
keyword=a.text.strip()
if "动态图" in keyword or "gif" in keyword:
print "keyword",keyword
self.dbcurr.execute('select id from info where word=%s',(keyword))
y = self.dbcurr.fetchone()
if not y:
self.dbcurr.execute('INSERT INTO info(word,status,page_num,left_num,how_many) VALUES(%s,0,0,0,0)',(keyword))
self.dbconn.commit()
except:
pass
def prepare_request(self):
self.lock()
self.dbcurr.execute('select * from info where status=0')
result = self.dbcurr.fetchone()
if result:
id,word,status,page_num,left_num,how_many=result
self.request_queue.put((id,word,page_num))
if page_num==0 and left_num==0 and how_many==0:
url=self.format_keyword_url(word)
self.generateSeed(url)
html=""
try:
url=self.format_top_url(word, page_num, 24)
html = self.browser.openurl(url).read()
except Exception as err:
print "err",err
#pass
if html!="":
how_many=self.how_many(html)
print "how_many",how_many
if how_many==None:
how_many=0
t=math.ceil(how_many/24*100) #只要前1/100即可
num = int(t)
for i in xrange(0,num-1):
self.dbcurr.execute('INSERT INTO info(word,status,page_num,left_num,how_many) VALUES(%s,%s,%s,%s,%s)',(word,0,i*24,num-i,how_many))
self.dbcurr.execute('update info SET status=1 WHERE id=%s',(id)) #置为已经访问
self.dbconn.commit()
self.unlock()
def start_work(self,req_max):
for item in xrange(req_max):
t = threading.Thread(target=self.work, args=(item,))
t.setDaemon(True)
t.start()
def lock(self): #加锁
self.mutex.acquire()
def unlock(self): #解锁
self.mutex.release()
def get_para(self,url,key):
values = url.split('?')[-1]
for key_value in values.split('&'):
value=key_value.split('=')
if value[0]==key:
return value[1]
return None
def makeDateFolder( self,par,child):
#self.lock()
if os.path.isdir( par ):
path=par + '//' + GetDateString()
newFolderName = path+'//'+child
if not os.path.isdir(path):
os.mkdir(path)
if not os.path.isdir( newFolderName ):
os.mkdir( newFolderName )
return newFolderName
else:
return par
#self.unlock()
def parse_json(self,data):
ipdata = json.loads(data)
try:
if ipdata['imgs']:
for n in ipdata['imgs']: #data子项
if n['objURL']:
try:
proxy_support = urllib2.ProxyHandler(proxy)
opener = urllib2.build_opener(proxy_support)
urllib2.install_opener(opener)
#print "proxy",proxy
self.lock()
self.dbcurr.execute('select ID from pic_info where objURL=%s', (n['objURL']))
y = self.dbcurr.fetchone()
#print "y=",y
if y:
print "database exist"
self.unlock() #continue 前解锁
continue
else:
real_extension=utils.get_extension(n['objURL'])
req = urllib2.Request(n['objURL'],headers=i_headers)
resp = urllib2.urlopen(req,None,5)
dataimg=resp.read()
name=str(uuid.uuid1())
filename=""
if len(real_extension)>4:
real_extension=".gif"
real_extension=real_extension.lower()
if real_extension==".gif":
filename =self.makeDateFolder("E://sosogif", "d"+str(self.count % 60))+"//"+name+"-www.sosogif.com-搜搜gif贡献"+real_extension
self.count+=1
else:
filename =self.makeDateFolder("E://sosogif", "o"+str(self.count % 20))+"//"+name+"-www.sosogif.com-搜搜gif贡献"+real_extension
self.count+=1
"""
name=str(uuid.uuid1())
filename=""
if len(real_extension)>4:
real_extension=".gif"
filename =self.makeDateFolder("E://sosogif", "d"+str(self.count % 60))+"//"+name+"-www.sosogif.com-搜搜gif贡献"+real_extension
self.count+=1
"""
try:
if not os.path.exists(filename):
file_object = open(filename,'w+b')
file_object.write(dataimg)
file_object.close()
self.anaylis_info(n,filename,real_extension) #入库操作
else:
print "file exist"
except IOError,e1:
print "e1=",e1
pass
self.unlock()
except IOError,e2:
#print "e2=",e2
pass
self.chance1+=1
except Exception as parse_error:
print "parse_error",parse_error
pass
def title_dealwith(self,title):
#print "title",title
a=title.find("<strong>")
temp1=title[0:a]
b=title.find("</strong>")
temp2=title[a+8:b]
temp3=title[b+9:len(title)]
return (temp1+temp2+temp3).strip()
def anaylis_info(self,n,filename,real_extension):
print "success."
#if self.wait_ana_queue.qsize()!=0:
#n,filename,real_extension=self.wait.ana_queue.get()
#self.lock()
objURL=n['objURL'] #图片地址
fromURLHost=n['fromURLHost'] #来源网站
width=n['width'] #宽度
height=n['height'] #高度
di=n['di'] #用来唯一标识
type=n['type'] #格式
fromPageTitle=n['fromPageTitle'] #来自网站
keyword=self.title_dealwith(fromPageTitle)
cs=n['cs'] #未知
os=n['os'] #未知
temp = time.time()
x = time.localtime(float(temp))
acTime = time.strftime("%Y-%m-%d %H:%M:%S",x) #爬取时间
self.dbcurr.execute('select ID from pic_info where cs=%s', (cs))
y = self.dbcurr.fetchone()
if not y:
print 'add pic',filename
self.commit_count+=1
self.dbcurr.execute('INSERT INTO pic_info(objURL,fromURLHost,width,height,di,type,keyword,cs,os,acTime,filename,real_extension) VALUES(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)',(objURL,fromURLHost,width,height,di,type,keyword,cs,os,acTime,filename,real_extension))
if self.commit_count==10:
self.dbconn.commit()
self.commit_count=0
#self.unlock()
def format_top_url(self,word,pn,rn):
url = TOP_URL.format(word=word, pn=pn,rn=rn).encode('utf-8')
return url
def how_many(self,data):
try:
ipdata = json.loads(data)
if ipdata['displayNum']>0:
how_many=ipdata['displayNum']
return int(how_many)
else:
return 0
except Exception as e:
pass
def get_pic(self):
"""
word="gif"
pn=0
rn=24
if self.key_word_queue.qsize()!=0:
word,pn,rn=self.key_word_queue.get()
url=self.format_top_url(word,pn,rn)
global proxy
if url:
try:
html=""
try:
req = urllib2.Request(url,headers=i_headers)
response = urllib2.urlopen(req, None,5)
#print "url",url
html = self.browser.openurl(url).read()
except Exception as err:
print "err",err
#pass
if html:
how_many=self.how_many(html)
#how_many=10000
print "how_many",how_many
word=self.get_para(url,"word")
rn=int(self.get_para(url,"rn"))
t=math.ceil(how_many/rn)
num = int(t)
for item in xrange(0,num-1):
"""
try:
global proxy
print "size of queue",self.request_queue.qsize()
if self.request_queue.qsize()!=0:
id,word,page_num = self.request_queue.get()
u=self.format_top_url(word,page_num,24)
self.lock()
self.dbcurr.execute('update info SET status=1 WHERE id=%s',(id))
self.dbconn.commit()
if self.chance >0 or self.chance1>1: #任何一个出问题都给换代理
if self.ID % 100==0:
self.dbcurr.execute("select count(*) from proxy")
for r in self.dbcurr:
count=r[0]
if self.ID>count:
self.ID=50
self.dbcurr.execute("select * from proxy where ID=%s",(self.ID))
results = self.dbcurr.fetchall()
for r in results:
protocol=r[1]
ip=r[2]
port=r[3]
pro=(protocol,ip+":"+port)
if pro not in self.next_proxy_set:
self.next_proxy_set.add(pro)
self.chance=0
self.chance1=0
self.ID+=1
self.unlock()
proxy_support = urllib2.ProxyHandler(proxy)
opener = urllib2.build_opener(proxy_support)
urllib2.install_opener(opener)
html=""
try:
req = urllib2.Request(u,headers=i_headers)
#print "u=",u
response = urllib2.urlopen(req, None,5)
html = response.read()
if html:
#print "html",type(html)
self.parse_json(html)
except Exception as ex1:
#print "error=",ex1
pass
self.chance+=1
if self.chance>0 or self.chance1>1:
if len(self.next_proxy_set)>0:
protocol,socket=self.next_proxy_set.pop()
proxy= {protocol:socket}
print "change proxy finished<<",proxy,self.ID
except Exception as e:
print "error1",e
pass
if __name__ == '__main__':
app = BaiduImage()
app.start_work(80)
#app.generateSeed()
while 1:
pass
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