http://haoning747.iteye.com/admin/blogs/2296787
这一篇我想写写如何爬取百度图片的爬虫，这个爬虫也是： 搜搜gif（ 在线制作功能点我） 的爬虫代码，其实爬虫整体框架还是差不多的，但就是会涉及到图片的的一些处理，还是花费了我不少时间的，所以我请阅读的本爬虫的孩子还是认真一些，毕竟程序猿都不容易啊。好的，我也不想多说，爬虫的代码我会分享到 去转盘网，想下载本爬虫代码的孩子请 点我下载，如果没有下载到，请 点击这个链接。
附代码：
PS:不会python的孩子赶快去补补吧，先把基础搞清楚再说
#coding:utf-8
"""
Created on 2015-9-17
@author: huangxie
"""
import time,math,os,re,urllib,urllib2,cookielib
from bs4 import BeautifulSoup
import time
import re
import uuid
import json
from threading import Thread
from Queue import Queue
import MySQLdb as mdb
import sys
import threading
import utils
import imitate_browser
from MySQLdb.constants.REFRESH import STATUS
reload(sys)
sys.setdefaultencoding('utf-8')
DB_HOST = '127.0.0.1'
DB_USER = 'root'
DB_PASS = 'root'
proxy = {u'http':u'222.39.64.13:8118'}
TOP_URL="http://image.baidu.com/i?tn=resultjsonavatarnew&ie=utf-8&word={word}&pn={pn}&rn={rn}"
KEYWORD_URL="https://www.baidu.com/s?ie=utf-8&f=8&tn=baidu&wd={wd}"
"""
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',
'Accept':'json;q=0.9,*/*;q=0.8',
'Accept-Charset':'utf-8;q=0.7,*;q=0.3',
'Accept-Encoding':'gzip',
'Connection':'close',
'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
}
"""
i_headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.48'}
def GetDateString():
x = time.localtime(time.time())
foldername = str(x.__getattribute__("tm_year"))+"-"+str(x.__getattribute__("tm_mon"))+"-"+str(x.__getattribute__("tm_mday"))
return foldername
class BaiduImage(threading.Thread):
def __init__(self):
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("[b]")
temp1=title[0:a]
b=title.find("[/b]")
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