I am scraping a website using Scrapy which require cooking and java-script to be enabled. I don't think I will have to actually process javascript. All I need is to pretend as if javascript is enabled.
Here is what I have tried: 1) Enable Cookies through following in settings
COOKIES_ENABLED = True
COOKIES_DEBUG = True
2) Using download middleware for cookies
DOWNLOADER_MIDDLEWARES = {
'scrapy.contrib.downloadermiddleware.useragent.UserAgentMiddleware': 400,
'scrapy.contrib.downloadermiddleware.cookies.CookiesMiddleware':700
}
3) Sending 'X-JAVASCRIPT-ENABLED': 'True'
DEFAULT_REQUEST_HEADERS={
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Accept-Language': 'en',
'X-JAVASCRIPT-ENABLED': 'True'
}
but none of them is working with me. Can you please suggest any idea or give me some direction ?
Thanks in advance for your replies.
You should try Splash JS engine with scrapyjs. Here is a example of how to set it up in your spider project:
SPLASH_URL = 'http://192.168.59.103:8050'
DOWNLOADER_MIDDLEWARES = {
'scrapyjs.SplashMiddleware': 725,
}
Scraping hub which is the same company behind Scrapy, has special instances to run your spiders with splash enabled.
Then yield SplashRequest
instead of Request
in your spider like this:
import scrapy
from scrapy_splash import SplashRequest
class MySpider(scrapy.Spider):
start_urls = ["http://example.com", "http://example.com/foo"]
def start_requests(self):
for url in self.start_urls:
yield SplashRequest(url, self.parse,
endpoint='render.html',
args={'wait': 0.5},
)
def parse(self, response):
# response.body is a result of render.html call; it
# contains HTML processed by a browser.
# …
AFAIK, there is no a universal solution. You have to debug the site, to see how it determines that Javascript is not supported/enabled by your client.
I don't think the server looks at X-JAVASCRIPT-ENABLED
header. Maybe there is a cookie set by Javascript when the page loads in a real javascript enabled browser? Maybe the server looks at user-agent
header?
See also this response.
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