user agent

A period of time has been studying how to use Python to crawl search engine results, in the implementation of the process encountered a lot of problems, I have to record the problems I encountered, I hope to encounter the same problem of children's

The Vary header defines which request header the cache mechanism should take into account when building its cache key value. For example, if the content of a Web page depends on the user's language preference, the page is called different depending

How can I determine whether the access end is a computer or a mobile phone ?. Currently, there are three opinions on the Internet: one is the User-Agent sent based on the browser, but this method obviously does not work. although some people list

Provides various official and user-released code examples. For code reference, you are welcome to share and learn 16. htaccess file setting skills. Reproduced original address: http://www.jb100.net/html/content-22-741-1.html The. htaccess file is a

Baidu Encyclopedia Description:Hypertext Transfer Protocol (Http,hypertext Transfer Protocol) is one of the most widely used network protocols on the Internet. All WWW documents must comply with this standard. HTTP was originally designed to provide

Basic use of the URLLIB2 libraryThe so-called Web crawl, is the URL address specified in the network resources from the network stream read out, save to Local. There are many libraries in python that can be used to crawl Web pages, and we'll learn

1.urllib2 Modify Header:(1) In the use of web crawlers, some sites do not like to be accessed by the program (non-human access), will check the "identity card" of the connector, by default, urllib2 his own version number python-urllib2/x.y as his

Web page crawl, is the URL address specified in the network resources from the network stream read out, save to Local. Urllib2 Introduction:URLLIB2 is the Python2.7 module (no need to download, import can be used) URLLIB2 Official document:

Compile the robots.txt file and the robots.txt file.WebsiteRobots.txtFile writing Intro Robots.txtIs a plain text file under the root directory of the website. In this file, the website administrator can declare that the website does not want to be

Search engine spider. Baidu's spider's useragent will contain the Baiduspider string. Related Materials: www.baidu.comsearchspider.htm usergoogle's spider useragent will contain Googl Baidu Baidu's spider user agent will contain the Baiduspider

"HTTP authoritative guide" Learning SummarySelf-active (self-animating) User agent for Web robot.Web bots are software programs that automate a series of web transactions without human intervention, alias "crawlers" (crawler), "Spiders", "worms".

(The last part of the DOM has been supplemented, welcome to Chrome Development Tools Learning Notes (2))Use the Devtools elements tool to debug page stylesCSS (Cascading style sheets Cascading style sheets) defines the presentation layer of a Web

A What is a robots.txt file? The search engine uses a program robot (aka Spider) to automatically access Web pages on the Internet and obtain web information. You can create a plain text file in your site robots.txt, in this file to

Reproduced original address: http://www.jb100.net/html/content-22-741-1.html. htaccess files (hypertext Access file) is a very powerful configuration file for Apache Web servers, and for this file, Apache has a bunch of parameters that allow you to

Introduction to robots.txt Example: http://www.baidu.com/robots.txtRobots.txt is a plain text file in which the website administrator can declare that the website does not want to be accessed by robots, or specify a search engine to include only

Android systems have download mechanisms, such as downloadmanager used by browsers. Unfortunately, downloadmanager is only available to browsers and cannot be called by common applications. In addition, if downloadmanager is used frequently,

The use of Emacs has been a year, and found that now is inseparable from her! ^_*. (The company's Win7 installed Emacs, its own PC also installed Emacs, the company's virtual desktop also installed Emacs, the server also installed Emacs.) Hey, all

ObjectiveRecently use wget download Baidu cloud resources, slow, in a friend recommended multi-threaded download found wget is actually just a single-threaded download tool, in the face of the file will appear very chicken, and there are many

Reptile Chapters1.python How to access the InternetURL(web address)+lib="urllib2. Check Documentation: Python document.3.response = Urllib.request.urlopen ("" www.baidu.com)HTML =html.decode ("Utf-8") to break binary decoding operations4. read Web

The Curl command is a file transfer tool that works under the command line using URL rules.Curl supports file uploads and downloads, so it is a comprehensive transfer tool, but traditionally, it is customary to call curl as a download tool.As a