spider scraper

Program | multithreading | control In the "Crawler/Spider Program Production (C # language)" article, has introduced the crawler implementation of the basic methods, it can be said that the crawler has realized the function. It's just that there is an efficiency problem and the download speed may be slow. This is caused by two reasons: 1. Analysis and download can not be synchronized. The Reptile/Spider pro

Prepare for formal SEO. The black chain code is still used, but it is a little special. Of course, test whether it is feasible first.You need to get a PHP document to record whether the visitor is a spider or a common user. Specifically, it is determined based on php's $ _ SERVER ['HTTP _ USER_AGENT '].The Code is as follows:$ Tmp = $ _ SERVER ['HTTP _ USER_AGENT '];If (strpos ($ tmp, 'googlebot ')! = False ){Echo 'Google ';} Else if (strpos ($ tmp, '

1. Introduction to Web SpiderWeb Spider, also known as web Crawler, is a robot that automatically captures information from Internet Web pages. They are widely used in Internet search engines or other similar sites to obtain or update the content and retrieval methods of these sites. They can automatically collect all of the page content they can access, for further processing by the search engine (sorting out the downloaded pages), and allows users t

requirements, the search engine will undoubtedly give a higher weight than the average website, even if there is no weight for the new site, the indexing will be very fast, this is one of the reasons why the new site can receive messages in seconds.Three steps: multiple external linksIn the process of website optimization, the promotion of external links is the focus, but what external links are the most effective? The diversified value chains are the most beneficial to the optimization of sear

Below is the access log file 14:43:22 Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1;. Net CLR 2.0.50727;. Net CLR 1.1.4322) 14:43:27 Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1;. Net CLR 2.0.50727;. Net CLR 1.1.4322) 14:44:18 Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp) 14:44:26 Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; sv1; Maxthon; qqdownload 1.7;. Net CLR 1.1.4322;. Net CLR 2.0.50727;. Net CLR 3.0.04506.648;. Net CLR 3.

There were two spider in a dilapidated temple, one under the eaves and the other on the shrine. One day, the roof of the old temple collapsed. Fortunately, the two spiders were not hurt and they were still busy knitting spider webs on their own sites. A few days later, the spider on the temple found that his network was always broken. A bird flew over, and a smal

We must all know that Baidu and Google have a spider robot, in other words, Baidu and Google's set of procedures or systems included in the site, we all call it spider robots, they are the program is not people, nor God, so they always have their own rules of activity, the following to talk about. First, the site included in the early Baidu site is included in the initial activities of the law, first enter

When I first started to do the station, I hardly ever bird a spider. Also rarely look at the log, the consequences are very serious, the site in my hands did not live 3 months, the light included in the home page spent 2 weeks, the egg pain, and then included a few, let alone what ranked. Although part of it is because I do not want to do that station, the site is not too important, the company only want to be used when the station group, usually rela

We do webmaster or to provide people to do SEO services or to the spider this small thing to touch thoroughly! Let her be loyal to you! Our internet is like a huge net, search engine through spiders to get our website, she climbed to which site, it means snapshot update, included increase. So how to let spiders more favor their own site, this article will give you a detailed introduction. One, it takes patience to lure a

Do SEO no one does not know spiders, robot.txt file is the file and spider communication, many people will say how to let spiders crawl, but very few people know to use robot.txt to control spiders, robot.txt use good words spider can be used for you. Let me introduce how to manipulate spiders. One. Screen the same page Search engines are a thing of the same, will not be included in duplicate or existing

not be updated the next day, but the update time significantly improved, before is a half month update once, now, the URL is updated on the same day, the key word is updated every day, from time to time will also be updated, which for me has been very satisfied, after all, I am still a novice, down I will tell you My views on Baidu Snapshot: As we all know, improve Baidu snapshot update time, its essence is to attract Baidu Spider to our website, an

Example code of several crawling methods of scrapy spider, scrapyspider This section describes the scrapy crawler framework, focusing on the scrapy component spider. Several crawling methods of spider: Crawl 1 page Create a link based on the given list to crawl multiple pages Find the 'next page' tag for crawling Go to the link and follow the link to cra

The demand for the soft route of sea spider in the soft route market is still very high, and its performance is also very good, maybe many people do not know how to use the soft route of sea spider through the vpn line, it does not matter, after reading this article, you must have gained a lot. I hope this article will teach you more things. I believe many of my eldest brothers have already learned and done

Php checks whether a visitor is a search engine spider's function code. For more information, see. /*** Determine whether it is a search engine spider ** @ author Eddy * @ return bool */function isCrawler () {$ agent = strtolower ($ _ SERVER ['http _ USER_AGENT ']); if (! Empty ($ agent) {$ spiderSite = array ("TencentTraveler", "Baiduspider +", "BaiduGame", "Googlebot", "msnbot", "sososospider + ", "Sogou web spi