开发scrapy web界面(一)
2021-04-21 04:26
标签:mamicode listening bsp host ISE crawl 调试 top nal scrapy 是一个很强大的爬虫框架,可以自定义很多插件,满足我们不同的需求.... 首先我们应该要会用twisted 写web service 其实scrapy 已经帮我们做了整理了 listen_tcp就可以开启web service 所以web 插件可以这样写 然后界面可以在Root里实现。 以下是实现的界面 可以添加控制爬虫的一些操作,如爬虫暂停、添加开始爬的内容等 当然、还可以做一些调试的界面或是其他有趣的 开发scrapy web界面(一) 标签:mamicode listening bsp host ISE crawl 调试 top nal 原文地址:https://www.cnblogs.com/apuyuseng/p/12252586.htmlfrom scrapy.utils.reactor import listen_tcp
class WebService(server.Site):
name = ‘WebService‘
def __init__(self, crawler):
self.crawler = crawler
self.crawler.itemData = []
portal = Portal(PublicHTMLRealm(Root(self.crawler)),
[StringCredentialsChecker(‘test‘, ‘tset‘)])
credential_factory = BasicCredentialFactory("Auth")
resource = HTTPAuthSessionWrapper(portal, [credential_factory])
server.Site.__init__(self,resource)
self.crawler.signals.connect(self.start_listening, signals.engine_started)
self.crawler.signals.connect(self.stopService, signals.engine_stopped)
self.crawler.signals.connect(self.item_scraped, signals.item_scraped)
self.crawler.signals.connect(self.spider_idle, signal=signals.spider_idle)
@classmethod
def from_crawler(cls, crawler):
return cls(crawler)
def start_listening(self):
self.port = listen_tcp([8000,8070], ‘127.0.0.1‘,self)
h = self.port.getHost()
logger.info("scrapy web console available at http://%(host)s:%(port)d",
{‘host‘: h.host, ‘port‘: h.port},
extra={‘crawler‘: self.crawler})
import webbrowser
webbrowser.open("http://%(host)s:%(port)d"%{‘host‘: h.host, ‘port‘: h.port})
def stopService(self):
self.port.stopListening()
def item_scraped(self,item, response, spider):
try:
self.crawler.itemData.append(item)
except:
pass
def spider_idle(self):
raise DontCloseSpider