How to scrape coupon code of coupon site (coupon code comes on clicking button)

问题

I want to scrape a page like - I'm using scrapy and python for the same...

I want to scrape the button which you can see in the below pic (left pic)

http://postimg.org/image/syhauheo7/

When I click the button in green saying View Code, It does three things:

Redirect to another id.
Opens a popup containing code
Show the code on the same page as can be seen in the above pic on right

How can I scrape the code using scrapy and python framework?

回答1:

Here's your spider:

from scrapy.http import Request
from scrapy.item import Item, Field
from scrapy.selector import HtmlXPathSelector
from scrapy.spider import BaseSpider


class VoucherItem(Item):
    voucher_id = Field()
    code = Field()


class CuponationSpider(BaseSpider):
    name = "cuponation"
    allowed_domains = ["cuponation.in"]
    start_urls = ["https://www.cuponation.in/babyoye-coupons"]

    def parse(self, response):
        hxs = HtmlXPathSelector(response)

        crawled_items = hxs.select('//div[@class="six columns voucher-btn"]/a')
        for button in crawled_items:
            voucher_id = button.select('@data-voucher-id').extract()[0]

            item = VoucherItem()
            item['voucher_id'] = voucher_id
            request = Request("https://www.cuponation.in/clickout/index/id/%s" % voucher_id,
                              callback=self.parse_code,
                              meta={'item': item})
            yield request

    def parse_code(self, response):
        hxs = HtmlXPathSelector(response)

        item = response.meta['item']
        item['code'] = hxs.select('//div[@class="code-field"]/span/text()').extract()

        return item

If you run it via:

scrapy runspider <script_name.py> --output output.json

you'll see the following in the output.json:

{"voucher_id": "5735", "code": ["MUM10"]}
{"voucher_id": "3634", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "5446", "code": ["APP20"]}
{"voucher_id": "5558", "code": ["No code for this deal"]}
{"voucher_id": "1673", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "3963", "code": ["CNATION150"]}
{"voucher_id": "5515", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "4313", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "4309", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "1540", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "4310", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "1539", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "4312", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "4311", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "2785", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "3631", "code": ["Deal Activated. Enjoy Shopping"]}
{"voucher_id": "4496", "code": ["Deal Activated. Enjoy Shopping"]}

Happy crawling!

来源：https://stackoverflow.com/questions/16499161/how-to-scrape-coupon-code-of-coupon-site-coupon-code-comes-on-clicking-button

标签

python

web-scraping

scrapy