Package: scrapy-selenium-mark
# Scrapy with selenium[![PyPI](https://img.shields.io/pypi/v/scrapy-selenium.svg)](https://pypi.python.org/pypi/scrapy-selenium) [![Build Status](https://travis-ci.org/clemfromspace/scrapy-selenium.svg?branch=master)](https://travis-ci.org/clemfromspace/scrapy-selenium) [![Test Coverage](https://api.codeclimate.com/v1/badges/5c737098dc38a835ff96/test_coverage)](https://codeclimate.com/github/clemfromspace/scrapy-selenium/test_coverage) [![Maintainability](https://api.codeclimate.com/v1/badges/5c737098dc38a835ff96/maintainability)](https://codeclimate.com/github/clemfromspace/scrapy-selenium/maintainability)Scrapy middleware to handle javascript pages using selenium.## Installation```$ pip install scrapy-selenium```You should use **python>=3.6**.You will also need one of the Selenium [compatible browsers](http://www.seleniumhq.org/about/platforms.jsp).## Configuration1. Add the browser to use, the path to the driver executable, and the arguments to pass to the executable to the scrapy settings:```pythonfrom shutil import whichSELENIUM_DRIVER_NAME = 'firefox'SELENIUM_DRIVER_EXECUTABLE_PATH = which('geckodriver')SELENIUM_DRIVER_ARGUMENTS=['-headless']  # '--headless' if using chrome instead of firefox```Optionally, set the path to the browser executable:```pythonSELENIUM_BROWSER_EXECUTABLE_PATH = which('firefox')```2. Add the `SeleniumMiddleware` to the downloader middlewares:```pythonDOWNLOADER_MIDDLEWARES = {'scrapy_selenium.SeleniumMiddleware': 800}```## UsageUse the `scrapy_selenium.SeleniumRequest` instead of the scrapy built-in `Request` like below:```pythonfrom scrapy_selenium import SeleniumRequestyield SeleniumRequest(url, self.parse_result)```The request will be handled by selenium, and the request will have an additional `meta` key, named `driver` containing the selenium driver with the request processed.```pythondef parse_result(self, response):print(response.request.meta['driver'].title)```For more information about the available driver methods and attributes, refer to the [selenium python documentation](http://selenium-python.readthedocs.io/api.html#module-selenium.webdriver.remote.webdriver)The `selector` response attribute work as usual (but contains the html processed by the selenium driver).```pythondef parse_result(self, response):print(response.selector.xpath('//title/@text'))```### Additional argumentsThe `scrapy_selenium.SeleniumRequest` accept 4 additional arguments:#### `wait_time` / `wait_until`When used, selenium will perform an [Explicit wait](http://selenium-python.readthedocs.io/waits.html#explicit-waits) before returning the response to the spider.```pythonfrom selenium.webdriver.common.by import Byfrom selenium.webdriver.support import expected_conditions as ECyield SeleniumRequest(url=url,callback=self.parse_result,wait_time=10,wait_until=EC.element_to_be_clickable((By.ID, 'someid')))```#### `screenshot`When used, selenium will take a screenshot of the page and the binary data of the .png captured will be added to the response `meta`:```pythonyield SeleniumRequest(url=url,callback=self.parse_result,screenshot=True)def parse_result(self, response):with open('image.png', 'wb') as image_file:image_file.write(response.meta['screenshot'])```#### `script`When used, selenium will execute custom JavaScript code.```pythonyield SeleniumRequest(url,self.parse_result,script='window.scrollTo(0, document.body.scrollHeight);',)```