web crawler proxy

When crawling site content, the most common problem is: the site has limited IP, there will be anti-grab function, the best way is IP rotation crawl (plus agent)Here's how scrapy Configure the agent for crawling1. Create a new "middlewares.py" under the Scrapy project 1234567891011121314 #Importingbase64librarybecausewe‘llneeditONLYincaseiftheproxywearegoingtouserequiresauthentication importbase64 #Startyourmiddlewareclass classProxyMiddleware(object): #overwriteprocessrequest d

Baidu Post Bar web crawler instance based on Python, python Crawler This article describes the web crawler of Baidu post bar based on Python. Share it with you for your reference. The details are as follows: Click here to download the complete instance code. Project content:

Introduction to Web Crawler framework jsoup and crawler framework jsoup Preface: before knowing the jsoup framework, due to project requirements, you need to capture content from other websites on a regular basis and think of using HttpClient to obtain the content of a specified website. This method is stupid, a url request is used to specify a website, and text

Web Crawler and search engine optimization (SEO), crawler seoPost reprinted: Http://www.cnblogs.com/nanshanlaoyao/p/6402721.htmlcrawling A crawler has many names, such as web Robots and spider. It is a software program that can automatically process a series of

(‘地址:‘+ipaddress+"端口:"+port+"地区:"+city+"类型:"+ leixing+"协议"+xieyi+"速度"+shudu+"时间:"+time1)exceptExceptionase:print(u"-------------------程序异常-----------------------")return‘success‘print(u‘本页抓取结束，正在跳转下一页‘)defpin():f2=open(‘ip.txt‘,‘r‘)count= len(open(‘ip.txt‘,‘rU‘).readlines())forxinrange(count):ip=f2.readline().split(‘:‘)[0]return1=os.system(‘ping-n5-w5%s‘%ip)ifreturn1:print(‘测试失败‘)else:print(‘测试成功，正在写入新文件‘)f3=open(‘SuccessIp.txt‘,‘a‘)f3.write(f2.readline()+‘\n‘)f3.close()f2.close()print(‘程序结束，可用I

Solution to Python web crawler garbled problem, python Crawler There are many different types of problems with crawler garbled code, including not only Chinese garbled characters, encoding conversion, but also garbled processing such as Japanese, Korean, Russian, and Tibetan, because the solution is consistent, it is d

Example of web crawler in python core programming, python core programming Crawler 1 #!/usr/bin/env python 2 3 import cStringIO # 4 import formatter # 5 from htmllib import HTMLParser # We use various classes in these modules for parsing HTML. 6 import httplib # We only need an exception

This article mainly introduces the Python crawler to crawl proxy IP and verify the availability of examples, has a certain reference value, now share to everyone, the need for friends can refer to Often write crawlers, will inevitably encounter the IP is the target of the site screen, silver, an IP is certainly not enough, as a program to save the ape, can not spend money, then go to find it, this time to

=explode ('%', Explode (':', $content) [1])[0]; if($num >= - $num the){ return "General"; }Else if($num >= the){ return "soon"; }Else{ return "more slowly"; } }),//Speed 'Chtime'= = Array ("#ip_list Tr:eq ($t) Td:eq (8)",'text'),//survival time. 'Yztime'= = Array ("#ip_list Tr:eq ($t) Td:eq (9)",'text'),//Validation Time ); $data= Querylist::query ($html, $rules)data; Print_r ($data); $ip= $data [0]["IP"]; $port= $data [0][

# print result. read () self. deal_data (result. read (). decode ('gbk') self. calculate_date (); # extract the content from the page code def deal_data (self, myPage): myItems = re. findall ('.*? (.*?) .*? (.*?) .*?', MyPage, re. s) # obtain credits for item in myItems: self. weights. append (item [0]. encode ('gbk') self. points. append (item [1]. encode ('gbk') # calculate the score. if the score is not displayed or the score is excellent, def calculate_date (self) is not ca

The first web crawler program written in Python, python Crawler Today, I tried to use python to write a web crawler code. I mainly wanted to visit a website, select the information I was interested in, and save the information in Excel in a certain format. This code mainly

How to disguise and escape anti-crawler programs in python web crawler Sometimes, the crawler code we have written is still running well, And suddenly an error is reported. The error message is as follows: Http 800 Internal internet error This is because your object website has configured anti-

#-*-Coding:utf-8-*-# python:2.x__author__ = ' Administrator 'Import Urllib2#例子Login= ' WeSC 'Passwd= "You ' llneverguess"Url= ' http://localhost 'def h1 (URL):From Urlparse import Urlparse as UpHdlr=urllib2. Httpbasicauthhandler ()Hdlr.add_password (' Archives ', Up (URL) [1],login,passwd)Opener=urllib2.build_opener (HDLR)Urllib2.install_opener (opener)Return URLdef req (URL):From Base64 import encodestring as SReq1=urllib2. Request (URL)B64str=s ('%s:%s '% (LOGIN,PASSWD)) [: -1]#-*-coding:utf-8

Recently, I have been collecting and reading some in-depth news and interesting texts and comments on the Internet for the purposes of public accounts, and have chosen several excellent articles to publish them. However, I feel that it is really annoying to read an article. I want to find a simple solution to see if I can automatically collect online data and then use the unified filtering method. Unfortunately, I recently prepared to learn about web

called the document node or root nodeTo make a simple XML file:(3) XPath uses a path expression to select a node in an XML document: Common path expressions are as follows:NodeName: Selects all child nodes of this node/: Select from root node: Selects nodes in the document from the current node of the matching selection, regardless of their location.: Select the current node.. : Selects the parent node of the current node@: Select Properties*: Matches any element node@*: Matches any attribute n

when we visited the site, we found that some of the page IDs were numbered sequentially, and we could crawl the content using ID traversal. But the limitation is that some ID numbers are around 10 digits, so the crawl efficiency will be very low and low! Import itertools from common import download def iteration (): Max_errors = 5 # Maximu M number of consecutive download errors allowed Num_errors = 0 # Current number of consecutive download errors For page in Itertools.count (1):

() for sel in Response.xpath ('//tr '): ip= Sel.xpath ('.//td[2]/text () '). Extract_first () Port=sel.xpath ( './/td[3]/ Text () "). Extract_first () item[' IP ']=str (IP) +": "+str (port) yield item 3, the preparation of pipeline #-*-Coding:utf-8-*- # Define Your item pipelines here # Don ' t forget to add your pipeline to the ITEM_PI Pelines setting # see:http://doc.scrapy.org/en/latest/topics/item-pipeline.html class Ippipeline

Android, with ToString ()//String Contentstr = Contentele.text ( ); Elements images = Contentele.getelementsbytag ("img"); string[] Imageurls = new string[images.size ()]; for (int i = 0; i Output information Articleitem [index=7928, imageurls=[/uploads/image/20160114/20160114225911_34428.png], title= Electric Courtyard 2014 development " Let the flower of Bloom the Winter campus "educational activities, publishdate=2016-01-14, source= sources: Movie news Network, readtime

Infi-chu:http://www.cnblogs.com/Infi-chu/First, the size of the Web crawler:1. Small size, small amount of data, crawl speed is not sensitive, requests library, crawl Web page2. Medium scale, large data size, crawl speed sensitive, scrapy library, crawl site3. Large-scale, large-scale, search engine, crawl speed is critical, custom development, crawl the entire s

Python web crawler for beginners (2) and python Crawler Disclaimer: the content and Code involved in this article are limited to personal learning and cannot be used for commercial purposes by anyone. Reprinted Please attach this article address This article Python beginners web cr