How to Work With Cookies in PHP
You might have heard about cookies, but what exactly are they, and what can we do with them? In this tutorial, we will focus on the basics of cookies, and…
RFID, Software Development and Physical Security
You might have heard about cookies, but what exactly are they, and what can we do with them? In this tutorial, we will focus on the basics of cookies, and…
default_charset = “utf-8”; As a MySQL or PHP developer, once you step beyond the comfortable confines of English-only character sets, you quickly find yourself entangled in the wonderfully wacky world of UTF-8 encoding.…
In this tutorial, we will show you, how to perform web scraping in Python using Beautiful Soup 4 for getting data out of HTML, XML and other markup languages. In…
As of PHP 5.4, the register_globals feature has been removed from php. If you still need the feature, this post is for you. What is register_globals? register_globals is an internal PHP setting (a…
Source: string – Python: How to determine the language? – Stack Overflow
by Chris Hexton You’ve probably seen webhooks integrations in a few of your applications, and you’re wondering what they are and if you should be using them. And it’s something to consider, as…
Learn how to scrape the web with Python! The internet is an absolutely massive source of data — data that we can access using web scraping and Python! In fact,…
Difficulty Level : Basic Last Updated : 10 Dec, 2021 Read Discuss URL Shortener, as the name suggests, is a service to help to reduce the length of the URL so that…
相信大家都知道,取得資料後能夠進行許多的應用,像是未來的趨勢預測、機器學習或資料分析等,而有效率的取得資料則是這些應用的首要議題,網頁爬蟲則是其中的一個方法。 網頁爬蟲就是能夠取得網頁原始碼中的元素資料技術,但是,有一些網頁較為特別,像是社群平台,需先登入後才能進行資料的爬取,或是電商網站,無需登入,但是要透過滾動捲軸,才會動態載入更多的資料,而要爬取這樣類型的網頁爬蟲,就稱為動態網頁爬蟲。 該如何實作呢?本文將使用Python Selenium及BeautifulSoup套件來示範動態網頁爬蟲的開發過程,重點包含: BeautifualSoup vs Selenium 安裝Selenium及Webdriver 安裝BeautifulSoup Selenium get()方法 Selenium元素定位 Selenium send_keys()方法 Selenium execute_script方法 BeautifulSoup find_all()方法 BeautifulSoup getText()方法 一、BeautifualSoup vs Selenium BeautifulSoup套件相信對於開發網頁爬蟲的人員來說,應該都有聽過,能夠解析及取得HTML原始碼各個標籤的元素資料,擁有非常容易上手的方法(Method),但是,對於想要爬取動態網頁資料來說,則無法達成,因為BeautifulSoup套件並沒有模擬使用者操作網頁的方法(Method),像是輸入帳號密碼進行登入或滾動捲軸等,來讓網頁動態載入資料,進行爬取的動作。 所以,這時候,就可以使用被設計於自動化測試的Selenium套件,來模擬使用者的動作,進行登入後爬取資料或滾動卷軸,並且能夠執行JavaScript程式碼,這些就是Selenium與BeautifulSoup套件最大不同的地方。對於開發Python動態爬蟲來說,就可以結合Selenium套件以上的特點,讓網頁動態載入資料後,再利用BeautifulSoup套件簡潔的方法(Method),將所需的資料爬取下來。 本文就是利用這樣的概念,利用Selenium套件登入Facebook後,前往粉絲專頁,執行滾動卷軸的JavaScript程式碼,讓網頁動態載入資料後,再使用BeautifulSoup套件爬取貼文標題。…