CODEWITHSUNDEEP
pythonxmlweb-scrapingscrapy
AppTest
AppTest

Reputation: 501

Pass scraped URL's from one spider to another

How can I send the scraped URL's from one spider to the start_urls of another spider?

Specifically, I want to run one spider which gets a list of URL's from an XML page. After the URL's have been retrieved I want them to by used by another spider for scraping.

from scrapy.spiders import SitemapSpider

class Daily(SitemapSpider):
    name = 'daily'
    sitemap_urls = ['http://example.com/sitemap.xml']

    def parse(self, response):
        print response.url

        # How do I send these URL's to another spider instead?

        yield {
            'url': response.url
        }

Upvotes: 3

Views: 1899

Answers (3)

Umair Ayub
Umair Ayub

Reputation: 21271

Why you want to use different spiders for such requirment?

You can just have 1 spider and then instead of passing URL to another spider, just yield another Request in your parse method.

from scrapy.spiders import SitemapSpider

class Daily(SitemapSpider):
    name = 'daily'
    sitemap_urls = ['http://example.com/sitemap.xml']

    def parse(self, response):

        yield Request(url="URL here", callback=callback_function)

Upvotes: 0

Alisher Gafurov
Alisher Gafurov

Reputation: 447

From first spider you can save url in some DB or send to some queue (Zerro, Rabbit MQ, Redis) for example via pipeline.

Second spider can get the url with method - start_requests

class MySpider(scrapy.Spider):
    name = 'myspider'

    def start_requests(self):
        urls = my_db.orm.get('urls');
        for url in urls:
            yield scrapy.Request(url)

Or urls can be passed to spider from queue broker via cli or API. Or spider can be just launched from broker and launched spider get his url by start_requests.

Really exists many ways how you can do it. The way depend of the criteria why you need to pass urls from one spider to other.

You can check this projects: Scrapy-Cluster, Scrapy-Redis. May be its what you searching for.

Upvotes: 1

DYZ
DYZ

Reputation: 57075

Write the URLs to a file as strings. Read them from the same file in the other spider.

Upvotes: 0

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