Crawler-simulated website login and simulated crawler Login
Use Selenium with PhantomJS to simulate login to Douban: https://www.douban.com/
#! /Usr/bin/python3 #-*-conding: UTF-8-*-_ author _ = 'mayi' "simulate logon to Douban: https://www.douban.com/"" from selenium import webdriver # Call the environment variable specified by the PhantomJS browser to create a browser object, executable_path: Specify the
, you can customize the opener parameter of PyQuery.
The opener parameter indicates the request library used by pyquery to initiate a request to the website. Common Request libraries such as urllib, requests, and selenium. Here we define a selenium opener.
From pyquery import PyQueryfrom selenium. webdriver import PhantomJS # Use selenium to access urldef selenium_opener (url): # I didn't put Phantomjs into
.WHL
After the download is complete, open a command window under Windows, switch to the storage directory of the WHL file you just downloaded, run pip install LXML-3.6.0-CP35-CP35M-WIN32.WHL
2.3, download the Web content Extractor programThe Web content Extractor program is a class published by Gooseeker for the open source Python instant web crawler project, and using this class can greatly reduce the commissioning time of the data collection rules, see the Python Instant web crawler p
-side driver are browser-based and are divided into 2 main types:One is the real browser driverFor example: Safari, FF Drive the browser itself in the form of plug-ins, ie, chrome is the binary files to drive the browser itself;These driver are launched directly and driven by invoking the browser's underlying interface to drive the browser, thus having the most realistic user scenario simulations, primarily for web compatibility testing use.One is pseudo browser driver (not working in the browse
Python3.4 + selenium crawling 58 City (1), python3.4seleniumCrawling shards
I learned about crawlers this week, but some js methods cannot be rendered by the requests method, such as the number of views, so I used selenium + phantomjs to render the webpage and obtain information.
Code on, detailed explanation in the comment:
from selenium import webdriverfrom bs4 import BeautifulSoupimport reclass GetPageInfo(object):
'The class mainly defines the met
driver are browser-based and are divided into 2 main types:One is the real browser driverFor example: Safari, FF Drive the browser itself in the form of plug-ins, ie, chrome is the binary files to drive the browser itself;These driver are launched directly and driven by invoking the browser's underlying interface to drive the browser, thus having the most realistic user scenario simulations, primarily for web compatibility testing use.One is pseudo browser driverSelenium supported pseudo-browse
This article mainly Selenium+python automatic test or crawler in the common positioning methods, mouse operation, keyboard operation introduced, I hope that the basic article on your help, if there are errors or shortcomings, please Haihan ~Previous directory:[python crawler] install PHANTOMJS and Casperjs in Windows and introduction (top)[Python crawler] installs pip+phantomjs+selenium under Windows[Python
above are in the static page, there are a number of sites, we need to crawl data is through the AJAX request, or through Java generated.
Solution: SELENIUM+PHANTOMJS
Selenium: Automated Web test solutions that completely simulate a real-world browser environment and completely simulate virtually all user actions
PHANTOMJS: A browser without a graphical interface
Get the personal details address of the
Before writing a Python script to crawl new posts with SELENIUM+PHANTOMJS, in the process of looping the page, PHANTOMJS always block, use webdriverwait set the maximum wait time is invalid. Replace PHANTOMJS with Firefox no improvement because this script will not be used for a long time, so take a temporary approach and open a new sub-thread fixed cycle to kill
'; Document.documentElement.appendChild (casperutils); Var%20interval=setinterval (function () {if (typeof% 20clientutils=== ' function ') {Window.__utils__=new%20window. Clientutils (); clearinterval (interval);}},50);} ());}) ();Note: The usage here is not very clear, Casperjs utils link The actual content is a JavaScript execution statement, the role is to generate a page with __uitls__ object, so that the user can debug in the browser console __utils__ function, I understand that, If you fe
introduce the protagonist of today!
Interpreter:Selenium
App:Phantomjs
Since it is interpreter,selenium can be downloaded according to my first blog's practice. PHANTOMJS, you can directly through the link I gave to download. When the two are all installed, you can start data capture formally. Of course, the example is my blog ~First on the sample code!#-*-coding:utf-8-*-# fromSeleniumImportWebdriverdefcrawling_webdriver ():#get loc
on another open-source project phantomjs. In short, phantomjs is a headlessBrowser, which is an unbounded browser. Headless testing awakened by the use of chutzapis is actually only used by phantomjs. It can also be used for: Page automation, network monitoring, and screen acquisition, and participate in quick start. Phantom
This article and we share the main is python crawler Sharp weapon selenium related content, together to see it, hope to you learn Python crawler helpful. What is selenium? In a word, automated testing tools. It supports a variety of browsers, including Chrome,Safari,Firefox and other mainstream interface browser, if you install a in these browsers Selenium plug-in, then you can easily implement the web interface test. In other words, call Selenium support these browser drivers. Anyway,,
cropping and stitching.
The concrete algorithm idea is clear, but needs attention more detail. This is not a repeat. For example code, please visit:[Github] PythonspiderlibsAdvantages: Do not need too much JS work, python+ a small number of JS code can be completedDisadvantage: splicing and other work will be webdriver to achieve differences, picture loading speed and other factors, need to pay more attention. In the case of quality assurance, the speed is relatively slowWay Three
. Ip.cn's Web page: http://www.ip.cn/index.php?ip=110.84.0.1296. ip-api.com:http://ip-api.com/json/110.84.0.129 (looks very good, seemingly directly returned to the Chinese city information, documents in Ip-api.com/docs/api:json)7. http://www.locatorhq.com/ip-to-location-api/documentation.php (this is to register to use, still not used it)
(2nd freegeoip.net Web site and generation of IP data, code in: HTTPS://GITHUB.COM/FIORIX/FREEGEOIP)
Why are the 4th and 52 of them Web queries also recomme
parameters of ajax requests. We have no way to construct the data requests we need. The website I crawled over the past few days is like this. In addition to encrypting ajax parameters, it also encapsulates some basic functions, all of which are calling its own interfaces, interface parameters are encrypted. When we encounter such a website, we cannot use the above method. I use the selenium + phantomJS framework to call the browser kernel,
-.-edit. My Chinese is taught by maths teacher ...Subsequent supplemental reference codes, links.Many websites use JavaScript ... Web content is dynamically generated by JS, some JS events triggered by the page content changes, links open. Even some websites do not work at all without JS, and instead return you with something like "Please open browser js".There are four solutions for JavaScript support:1, write code to simulate the relevant JS logic.2, call an interface browser, similar to a var
simple, with BS4 casually find an anonymous IP site for proxy IP crawl, and then clean the IP, can use to leave to write to the list, Then you can form an IP pool, and finally when an IP is not available, then remove it from the pool! IP pool making, recommended reference @ Seven nights story – Proxy IP poolMethod 4: Avoid invisible element trapsClimb crawling on their own crawling out of the hidden elements, you say you are not a reptile, this is the site to the crawler traps, as long as the d
. The server filter has two functions: one is to get the URL, the second is to identify the search engine request and redirect to the local snapshot; The local crawler is to render the page as a local snapshot. The workflow is roughly as follows:Config on filter in Web. XML, the filter crawls to the URL when the site is first visited, and gives it to the local crawler. This crawler is a crawler with Dynamic Data capture, mainly using the SELENIUM+PHANTOMJS
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