whimfoome / web_scraper

Fix web_scraper package overflow in RegExp with too big files in optimized builds.

A Simple Web Scraper for Dart & Flutter

A very basic web scraper implementation to scrap html elements from a web page.

Pull requests are most welcome.

Getting Started

In your pubspec.yaml root add:

dependencies:
  web_scraper:

then,

import 'package:web_scraper/web_scraper.dart';

Note that as of version 0.0.6, the project supports not only Flutter projects, but also Dart projects.

Implementation

    final webScraper = WebScraper('https://webscraper.io');
    if (await webScraper.loadWebPage('/test-sites/e-commerce/allinone')) {
      List<Map<String, dynamic>> elements = webScraper.getElement('div.thumbnail > div.caption', ['h4']);
      print(elements);
    }

Checkout web_scraper_test.dart file to have closer look on all functionalities.

Methods

Method	Description	Arguments	Return Type
loadWebPage	Loads the webpage into response object and then parse it into the document object	String route	Future <bool>
loadFromURL	Loads the webpage from provided URL into response object and then parse it into the document object	String page	Future <bool>
loadFromString	Loads the webpage from a String (usually stored by the getPageContent method) into response object and then parse it into the document object. This operation is completely synchronous and exists as a helper method to perform compute() flutter operations and avoid jank	String responseBodyAsString	Future <bool>
getPageContent	Returns webpage's html in string format	Void	String body
getElement	Returns List of elements found at specified address	String address, List <String> attributes	List <Map<String, dynamic>>
getElementTitle	Returns List of element titles found at specified address	String address	List <String>
getElementAttribute	Returns List of elements single attribute found at specified address (if you wish to get multiple attributes at once, please use getElement instead)	String address, List <String> attributes	List <String>
getAllScripts	Returns the list of all data enclosed in script tags of the document	Void	List <String>
getScriptVariables	Returns Map between given variable names and list of their occurence in the script tags	List <String> variableNames	Map <String, dynamic>

Contributing

• Please branch from develop to implement bug fix/new feature.
• Ensure that code is formatted according to base dart rules & using the latest stable version of dart.
• Open a PR with develop as the PR target with a clear description.