老司机教你用爬虫爬p*hub

import urllib2
import urllib
import datetime
import re
import os.path

to_find_string="https://bd.phncdn.com/videos/"
big_path=""

def save_file(this_download_url,path):
    print"- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "
    time1=datetime.datetime.now()
    print str(time1)[:-7],
    if (os.path.isfile(path)):
        file_size=os.path.getsize(path)/1024/1024
        print "File "+path+" ("+ str(file_size)+"Mb) already exists."
        return
    else:   
        print "Downloading "+path+"..."
        f = urllib2.urlopen(this_download_url) 
        data = f.read() 
        with open(path, "wb") as code:     
            code.write(data)  
        time2=datetime.datetime.now()
        print str(time2)[:-7],
        print path+" Done."
        use_time=time2-time1
        print "Time used: "+str(use_time)[:-7]+", ",
        file_size=os.path.getsize(path)/1024/1024
        print "File size: "+str(file_size)+" MB, Speed: "+str(file_size/(use_time.total_seconds()))[:4]+"MB/s"


def download_the_av(url):
    req = urllib2.Request(url)
    content = urllib2.urlopen(req).read()
    while len(content)<100:
        print"try again..."
        content = urllib2.urlopen(req).read()
    print "All length:" +str(len(content))

    title_begin=content.find("<title>")
    title_end=content.find("</title>")
    title=content[title_begin+7:title_end-14]
    title=title.replace('/','_')
    title=filter(lambda x:x in "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ _-",title)

    quality=['720','480','240']
    for i in quality:
        find_position=content.find("\"quality\":\""+i+"\"")
        if find_position>0:
            print "Quality: "+i+"P"
            break
    to_find=content[find_position:find_position+4000]

    pattern=re.compile(r"\"videoUrl\":\"[^\"]*\"")
    match = pattern.search(to_find) 
    if match:
        the_url=match.group() 
    the_url=the_url[12:-1]#the real url
    the_url=the_url.replace("\\/","/")
    save_file(the_url,big_path+title+".mp4")



urls=["https://www.p***hub.com/view_video.php?viewkey=ph592ef8731630a",]
print len(urls),
print " videos to download..."
count=0

for url in urls:
    print count
    count+=1
    download_the_av(url)
print "All done"

import urllib2
import urllib
import datetime
import re
import os.path
import requests

def save_file(this_download_url,path):
    print"- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "
    time1=datetime.datetime.now()
    print str(time1)[:-7],
    if (os.path.isfile(path)):
        file_size=os.path.getsize(path)/1024/1024
        print "File "+path+" ("+ str(file_size)+"Mb) already exists."
        return
    else:
        print "Downloading "+path+"..."
        r = requests.get(this_download_url,stream=True)
        with open(path.encode('utf-8'), "wb") as code:
            code.write(r.content)
        time2=datetime.datetime.now()
        print str(time2)[:-7],
        print path+" Done."
        use_time=time2-time1
        print "Time used: "+str(use_time)[:-7]+", ",
        file_size=os.path.getsize(path)/1024/1024
        print "File size: "+str(file_size)+" MB, Speed: "+str(file_size/(use_time.total_seconds()))[:4]+"MB/s"

def download_url(website_url):
    fuckyou_header= {'User-Agent':'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6'}
    req = urllib2.Request(website_url,headers=fuckyou_header)
    content = urllib2.urlopen(req).read()
    while len(content)<100:
        print"try again..."
        content = urllib2.urlopen(req).read()
    print "Web page all length:" +str(len(content))

    pattern=re.compile(r"http://m4.26ts.com/[.0-9-a-zA-Z]*.mp4")
    match = pattern.search(content)

    if match:
        the_url=match.group()
        save_file(the_url,the_url[19:])
    else:
        print "No video found."

urls=["http://www.46ek.com/view/22133.html",]
count=0
print len(urls),
print " videos to download..."
for i in urls:
    count+=1
    print count
    download_url(i)
print "All done"

转载
https://www.zhihu.com/question/20799742