运行 1 个网站的 scrapy 中的多个蜘蛛并行？

Question

我想抓取一个包含 2 个部分的网站，但我的脚本没有我需要的那么快。

是否可以启动 2 个蜘蛛，一个用于抓取第一部分，另一个用于抓取第二部分？

我尝试了 2 个不同的类，运行它们

scrapy crawl firstSpider
scrapy crawl secondSpider

但我认为它不聪明。

我阅读了 documentation of scrapyd 但我不知道它是否适合我的情况。

Answer 1

我想你要找的是这样的：

import scrapy
from scrapy.crawler import CrawlerProcess

class MySpider1(scrapy.Spider):
    # Your first spider definition
    ...

class MySpider2(scrapy.Spider):
    # Your second spider definition
    ...

process = CrawlerProcess()
process.crawl(MySpider1)
process.crawl(MySpider2)
process.start() # the script will block here until all crawling jobs are finished

您可以在以下位置阅读更多信息：running-multiple-spiders-in-the-same-process。

Answer 2

或者你可以运行这样，你需要将这段代码保存在与scrapy.cfg相同的目录中（我的scrapy版本是1.3.3）：

from scrapy.utils.project import get_project_settings
from scrapy.crawler import CrawlerProcess

setting = get_project_settings()
process = CrawlerProcess(setting)

for spider_name in process.spiders.list():
    print ("Running spider %s" % (spider_name))
    process.crawl(spider_name,query="dvh") #query dvh is custom argument used in your scrapy

process.start()

Answer 3

更好的解决方案是（如果你有多个蜘蛛）动态获取蜘蛛和运行它们。

from scrapy import spiderloader
from scrapy.utils import project
from twisted.internet.defer import inlineCallbacks


@inlineCallbacks
def crawl():
    settings = project.get_project_settings()
    spider_loader = spiderloader.SpiderLoader.from_settings(settings)
    spiders = spider_loader.list()
    classes = [spider_loader.load(name) for name in spiders]
    for my_spider in classes:
        yield runner.crawl(my_spider)
    reactor.stop()

crawl()
reactor.run()

（第二种解法）： 因为 spiders.list() 在 Scrapy 1.4 中被弃用 Yuda 解决方案应该转换成类似

from scrapy import spiderloader    
from scrapy.utils.project import get_project_settings
from scrapy.crawler import CrawlerProcess

settings = get_project_settings()
process = CrawlerProcess(settings)
spider_loader = spiderloader.SpiderLoader.from_settings(settings)

for spider_name in spider_loader.list():
    print("Running spider %s" % (spider_name))
    process.crawl(spider_name)
process.start()

运行 1 个网站的 scrapy 中的多个蜘蛛并行？

Running Multiple spiders in scrapy for 1 website in parallel?

python

web-crawler

scrapy

web-scraping

scrapy-spider