Python-爬取某站所有图片

#-*- coding:utf-8 -*-
import re
import urllib
import urllib2
import os
import chardet
import sys
'''
def get_html(url):#正常获取网页内容
    try:
        request = urllib2.Request(url,headers=ua_headers)
        response = urllib2.urlopen(request)
        html = response.read()
        return html
    except:
        print "获取内容失败"
'''
def get_html(url):#转码获取网页内容
    try:
        request = urllib2.Request(url,headers=ua_headers)
        data = urllib2.urlopen(request).read()
        typeEncode = sys.getfilesystemencoding()
        infoencode = chardet.detect(data).get('encoding','gb2312')#根据网站编码来更改此行中的”gb2312“
        html = data.decode(infoencode,'ignore').encode(typeEncode)
        return html
    except:
        print "获取内容失败"
        
ua_headers={    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36',
    'Cookie': 'AspxAutoDetectCookieSupport=1'
}

url = "http://www.5442.com/meinv/"
########################################################
#先获取meinv页面内的所有tag链接。然后利用tag的名字创建相应的目录。
########################################################
tag_code = get_html(url)
tag_egrep = r'href="(.*).*" class="'
tag_url_list = re.findall(tag_egrep, tag_code)
print
print "[V]已成功爬去meinv页面内所有tag分类的链接"
print tag_url_list##打印meinv页面的所有链接
for tag_url in tag_url_list:
    try:
        tag_dir_name = tag_url[24:-5]
        #tag_mkpath = "C:\\Users\\Administrator\\Desktop\\Python-learn\\Photos\\" + tag_dir_name
        tag_mkpath = "Photos/" + tag_dir_name
        tag_mkdir = os.path.exists(tag_mkpath)
        print
        print "...已成功匹配到该Tag的名称:" + tag_dir_name
        if not tag_mkdir:
            os.makedirs(tag_mkpath)
            print "...创建%s目录成功----"%tag_dir_name
        else:
            print "...已有此%s目录----"%tag_dir_name
    except:
        print "...[X]获取%s链接失败或创建%s文件夹失败[X]"%tag_dir_name
        ##################################
        #然后使用拿到的tag链接获取所有tz的链接。
        ##################################
    try:
        tz_code = get_html(tag_url)
        tz_url_egrep = r'href="(.*).*" target="_blank" title="'
        tz_url_list = re.findall(tz_url_egrep,tz_code) 
        print tz_url_list
        for tz_url in tz_url_list:
            
            print ".........当前帖子链接---"+tz_url
            try:
                xz_dir = tag_mkpath + ".html"
                urllib.urlretrieve(tag_url,xz_dir)
                 #tz_name_egrep = r'_blank" title="(.*?)">'
                tz_name_egrep = r"<img alt='(.*?)' src"
                tz_name_list = re.findall(tz_name_egrep, tz_code)
                print tz_name_list  
                t=0
                ###############################################
                #然后使用拿到的tag链接获取所有tz的名字。并创建相应的目录
                ###############################################
                for x_tz_name in tz_name_list:
                    print ".........已成功匹配到"+x_tz_name
                    tz_mkpath = tag_mkpath + "/" + x_tz_name
                    tz_mkdir = os.path.exists(tz_mkpath)
                    if not tz_mkdir:
                        os.makedirs(tz_mkpath)
                        print ".........创建%s目录成功"%x_tz_name
                    else:
                        print ".........已有%s此目录"%x_tz_name
                    ###############################################
                    #然后使用拿到的tag链接获取所有tz的链接。并创建相应的目录
                    ###############################################
                    xx = 0
                    while True : 
                        try:
                            ttz_url = tz_url_list[t]#手动循环每个帖子
                            ###########################
                            #添加每个帖子内的第N个页面的连接
                            ###########################
                            if xx == 0:
                                tz_HQ_url = ttz_url
                            else:
                                tz_hz_url = ttz_url[-5:]
                                tz_qz_url = ttz_url[:-5]+"_"
                                tz_HQ_url = tz_qz_url + str(xx) + tz_hz_url
                            print "-------------------------------------------"+tz_HQ_url
                            #######################
                            #获取当前页面的所有图片连接
                            #######################
                            img_code = get_html(tz_HQ_url)
                            img_url_egrep = r"src='(.*).*' alt=''"
                            img_url_list = re.findall(img_url_egrep,img_code)
                            img = img_url_list[0]
                            try:
                                print "............已成功爬取到%s内所有图片的链接"% x_tz_name
                                print "............[所有图片的链接]"
                                print img_url_list
                                print "............%s中第%s个图片链接：%s"%(x_tz_name,xx,img)
                                img_name = tag_mkpath + "/"+x_tz_name +"/"+ img[-15:]
                                urllib.urlretrieve(img,img_name)#下载图片
                                print "...............已成功下载图片："+img_name
                                print "========================================================="
                                print "========================================================="
                                print
                            except:
                                print "[X]下载图片出错！"
                                print "========================================================="
                                print "========================================================="
                                print
                            xx = xx + 1
                        except:
                            print "while false"
                            break
                    t=t+2    
            except:
                print "爬取%s中图片链接失败！"%x_tz_name
            ##########################################################################
            #判断当前循环执行后是否创建对应的文件夹，如果有则结束循环直接进行下一个tag标签页面的爬取
            ##########################################################################
            if os.access(str(xz_dir), os.F_OK):
                break 
            else:
                pass  
                #渣渣代码不足为外人道也         
    except:
        print "爬取%s中帖子失败"%tag_dir_name