list crawlers

is schema-valid (schema valid).2.2 HTMLHTML (Hyper Text mark-up Language) is the Hypertext Markup Language, which is the description language of www.2.3 DOMThe Document Object model, or DOM, is the standard programming interface recommended by the Organization for the processing of extensible flag languages. On a Web page, objects that organize pages (or documents) are organized in a tree structure that represents the standard model of objects in a document called the DOM2.4 JSONJSON (JavaScrip

://secure.verycd.com/signin/*/http://www.verycd.com/‘,data = postdata)result = urllib2.urlopen(req).read()#4 伪装成浏览器访问headers = {‘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(url = ‘http://secure.verycd.com/signin/*/http://www.verycd.com/‘,data = postdata,headers = headers)#5 反”反盗链”headers = {‘Referer‘:‘http://www.cnbeta.com/articles‘} 4.[Code]Multithreading concurrent fetching? 123456789101112131

Requests,python HTTP Request Library, the equivalent of Android Retrofit, its features include keep-alive and connection pooling, Cookie persistence, content auto-decompression, HTTP proxy, SSL authentication, connection timeout, Session and many other special Compatible with Python2 and Python3.Installation of the third party libraries:Pip Install UrllibPIP Install requestsThe small reptile code is as follows:#-*-Coding:utf-8-*-#导入第三方库Import UrllibFrom BS4 import BeautifulSoupImport requestsUrl

........................The law of the URL change is very simple, just p after the number is not the same, and with the number of page numbers is exactly the same, this is very good to run ... Write a simple loop to iterate through all the URLs.For a in range (1,6):url = ' http://cd.xiaozhu.com/search-duanzufang-p{}-0/'. Format (a)We try 5 pages here, you can write the number of crawled pages according to your own needs.The complete code is as follows:From lxml import etreeImport requestsImport

() #捕捉文章列表 # here in the source query "Operation Result:As shown, to the successful extraction of the first article URL address, then the next thing is good to do, I just need to loop on the flow of the document as above, the address of each article can be, and finally to each article processing on the lineThe following code for exception capture, I found that if the exception is not processed, then the URL return value will be more than one blank line, resulting in the crawled article can not

new document and start writing codeClick on the top right: New > Python 3, which creates an Ipython file,Click above utitled can change the name of the document, the following space can write code:3.4 Jupyter Notebook Function Introduction Create the first instance: crawl Baidu Home With only four lines of code, we can download the contents of the homepage of Baidu:1. Import the requests library; 2. Download Baidu homepage content; 3. Change the encoding; 4. Print contentSpecific

Wrote a lot of reptile applet, the previous several times mainly with C # + Html Agility Pack to complete the work. Because the. NET BCL provides only "bottom-level" HttpWebRequest and "middle" WebClient, there is a lot of code to be written about HTTP operations. Plus, writing C # requires Visual Studio, a "heavy" tool that has long been a low-performance development. Recent projects have come into contact with a magical language, groovy, a dynamic language that is fully compatible with the Ja

the server itself.Delete: Deletes a resource. This is mostly rare, but there are some places like Amazon's S3 cloud service that use this method to delete resources.If you want to use HTTP PUT and DELETE, you can only use the lower-level httplib library. Even so, we can make it possible for URLLIB2 to send a PUT or delete request in the following way, but the number of times it is used is really small, as mentioned here.Python 1234 Import Urllib2Request = Urllib2. Request (

Urllib2Values = {}values[' username ' = "[email protected]"values[' password ' = "XXXX"data = Urllib.urlencode (values)url = "Http://passport.csdn.net/account/login?from=http://my.csdn.net/my/mycsdn"Request = Urllib2. Request (Url,data)Response = Urllib2.urlopen (Request)Print Response.read () the above method realizes Post-mode transferGet mode:as Get mode we can directly write the parameters to the URL above, directly build a URL with parameters to come out.Python 1

,en;q=0.8,zh-hans-cn;q=0.5,zh-hans;q=0.3 ', ' user-agent ': ' mozilla/5.0 (Windows NT 6.3; WOW64; trident/7.0; rv:11.0) like Gecko '};import urllib2url= ' Http://blog.csdn.net/berguiliu '; req=urllib2. Request (URL); Req.add_header (' user-agent ', ' mozilla/5.0 (Windows NT 6.3; WOW64; trident/7.0; rv:11.0) like Gecko '); Browser=urllib2.urlopen (req);d ata = Browser.read (); Re_blog_list=re.compile (R ' href= "(/berguiliu/article/details/[ 0-9]{8,8}) ">" Url_list=re.findall (re_blog_list,data);

:25.0) gecko/20100101 firefox/25.0 ') # set specific browser information as needed # # #r "D:\\phantomjs-2.1.1-windows\bin\phantomjs.exe", Driver = Webdriver. PHANTOMJS (Desired_capabilities=dcap) #封装浏览器信息) # Specifies the browser to use, #driver. Set_page_load_timeout (5) # Set timeout time drive R.get (response.url) # #使用浏览器请求页面 Time.sleep (3) #加载3秒, waiting for all data to load # # #通过class来定位元素属性 # # # #title是标题 Title=driver.find_element_by_class_name (' title '). Text ###.text

Tags: connection number attr composition mys src height width picture into1. Packages that need guidanceImport Pymysql2.# MySQL connection information (in dictionary form)Db_config ={ ' Host ': ' 127.0.0.1 ', #连接的主机id (107.0.0.1 is a native ID) ' Port ': 3306, ' User ': ' * * * ', ' Password ': ' * * * ', ' DB ': ' Test ', # (database name) ' CharSet ': ' UTF8 '}3.# Getting a database connectionConnection = Pymysql.connect (**db_config)Connection () Details of the basic knowled

';} 2. crawl more users After capturing your personal information, you need to access the user's followers and the list of users you have followed to obtain more user information. Then access the service layer by layer. As you can see, there are two links in the Personal Center page: There are two links here. one is followed, and the other is followed. the link "followed" is used as an example. Use regular expression matching to match the correspon

bolddel tag[' class ']del tag[' id ']tag#extremely boldtag[' class ']# Keyerror: ' Class ' Print (Tag.get (' class ')) # None You can also find DOM elements in a random way, such as the following example 1. Build a document Html_doc = "" The Dormouse ' s storythe dormouse ' s storyonce upon a time there were three Little sisters; And their names Wereelsie,lacie Andtillie;and they lived at the bottom of a well .... "" "from BS4 import Beautifulsoupsoup = BeautifulSoup (Html_doc) 2. Various So

, workplace clothes, and dresses 7 */ 8 Public Class Program 9 { 10 Static Dictionary String , String > Dicmapping = New Dictionary String , String > (); 11 12 Static Void Main ( String [] ARGs) 13 { 14 // Distribution of initial URLs 15 Foreach (VaR Key In Configurationmanager. configurettings) 16 { 17 VaR Factory = New Channelfactory New Nettcpbinding (), New Endpointaddress (key. tostri

, but either we need a name for the input to test, either these sites or the app's name is very small, or can not meet our needs such as limited words, You can start charging or you won't find a good one at the end. So I want to do a program like this: The main function is to give the batch name to provide reference, these names are combined with the baby's birthday eight figure out; I can expand the name of the library, such as the online discovery of a number of poems in the good name

.Request (), urllib2.urlopen (), urllib2, urlopen (). read () 2. Regular Expression matching: Method: Describes the usage of the re module .. The Code is as follows: # Coding: utf-8import urllibimport urllib2import reimport timegjc = urllib. quote ("tech") url = "http://sug.so.360.cn/suggest? Callback = suggest_so encodein = UTF-8 encodeout = UTF-8 format = json fields = word, obdata word = "+ gjcprint urlreq = urllib2.Request (url) html = urllib2.urlopen (req ). read () unicodePage = html

://www.cnbeta.com/articles/385387.htmHttp://www.ifanr.com/5120052. How can I extract the tag of an article after capturing it? Used for later recommendation in similar articles. The first and existing problems are important: how to identify and extract the webpage text ?. The second problem is that I used the word segmentation algorithm to extract words with a high rate. Even a very simple algorithm does not have much effect on most data pages. However, you can search for many word segmentati

1 "Network crawler highly configurable." 2 "web crawler can parse the link in the captured Web page 3 "web crawler has a simple storage configuration 4 "web crawler has intelligent Update Analysis function based on Web page 5 "The efficiency of the web crawler is quite high So according to the characteristics, in fact, is called, How to design a reptile? What are the steps to pay attention to? 1 "URL traversal and record This larbin done very well, in fact, the traversal of the URL is very simpl

request a picture and forge a referer in the request. After using the regular expression to get the link to the picture, send a request again, this time with the source of the chip request, indicating that the request from the Web site forwarding. Specific examples are as follows: function getimg ($url, $u _id) { if (file_exists ('./images/') $u _id. ". jpg") { return "images/$u _id". '. jpg '; } if (empty ($url)) { return '; }