Versuchen, herauszufinden, wie Scrapy funktioniert und damit Informationen in Foren zu finden.Scrapy liefert kein Ergebnis (crawled 0 Seiten)
items.py
import scrapy
class BodybuildingItem(scrapy.Item):
# define the fields for your item here like:
title = scrapy.Field()
pass
spider.py
from scrapy.spider import BaseSpider
from scrapy.selector import Selector
from bodybuilding.items import BodybuildingItem
class BodyBuildingSpider(BaseSpider):
name = "bodybuilding"
allowed_domains = ["forum.bodybuilding.nl"]
start_urls = [
"https://forum.bodybuilding.nl/fora/supplementen.22/"
]
def parse(self, response):
responseSelector = Selector(response)
for sel in responseSelector.css('li.past.line.event-item'):
item = BodybuildingItem()
item['title'] = sel.css('a.data-previewUrl::text').extract()
yield item
Das Forum Ich versuche, die Post-Titel von in diesem Beispiel zu bekommen, ist dies: https://forum.bodybuilding.nl/fora/supplementen.22/
Allerdings bekomme ich keine Ergebnisse:
class BodyBuildingSpider(BaseSpider): 2017-10-07 00:42:28 [scrapy.utils.log] INFO: Scrapy 1.4.0 started (bot: bodybuilding) 2017-10-07 00:42:28 [scrapy.utils.log] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'bodybuilding.spiders', 'SPIDER_MODULES': ['bodybuilding.spiders'], 'ROBOTSTXT_OBEY': True, 'BOT_NAME': 'bodybuilding'} 2017-10-07 00:42:28 [scrapy.middleware] INFO: Enabled extensions: ['scrapy.extensions.memusage.MemoryUsage', 'scrapy.extensions.logstats.LogStats', 'scrapy.extensions.corestats.CoreStats'] 2017-10-07 00:42:28 [scrapy.middleware] INFO: Enabled downloader middlewares: ['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware', 'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware', 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware', 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware', 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware', 'scrapy.downloadermiddlewares.retry.RetryMiddleware', 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware', 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware', 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware', 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware', 'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware', 'scrapy.downloadermiddlewares.stats.DownloaderStats'] 2017-10-07 00:42:28 [scrapy.middleware] INFO: Enabled spider middlewares: ['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware', 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware', 'scrapy.spidermiddlewares.referer.RefererMiddleware', 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware', 'scrapy.spidermiddlewares.depth.DepthMiddleware'] 2017-10-07 00:42:28 [scrapy.middleware] INFO: Enabled item pipelines: [] 2017-10-07 00:42:28 [scrapy.core.engine] INFO: Spider opened 2017-10-07 00:42:28 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 2017-10-07 00:42:28 [scrapy.core.engine] DEBUG: Crawled (404) https://forum.bodybuilding.nl/robots.txt> (referer: None) 2017-10-07 00:42:29 [scrapy.core.engine] DEBUG: Crawled (200) https://forum.bodybuilding.nl/fora/supplementen.22/> (referer: None) 2017-10-07 00:42:29 [scrapy.core.engine] INFO: Closing spider (finished) 2017-10-07 00:42:29 [scrapy.statscollectors] INFO: Dumping Scrapy stats: {'downloader/request_bytes': 469, 'downloader/request_count': 2, 'downloader/request_method_count/GET': 2, 'downloader/response_bytes': 22878, 'downloader/response_count': 2, 'downloader/response_status_count/200': 1, 'downloader/response_status_count/404': 1, 'finish_reason': 'finished', 'finish_time': datetime.datetime(2017, 10, 6, 22, 42, 29, 223305), 'log_count/DEBUG': 2, 'log_count/INFO': 7, 'memusage/max': 31735808, 'memusage/startup': 31735808, 'response_received_count': 2, 'scheduler/dequeued': 1, 'scheduler/dequeued/memory': 1, 'scheduler/enqueued': 1, 'scheduler/enqueued/memory': 1, 'start_time': datetime.datetime(2017, 10, 6, 22, 42, 28, 816043)} 2017-10-07 00:42:29 [scrapy.core.engine] INFO: Spider closed (finished)
Ich verfolge die Führung hier: http://blog.florian-hopf.de/2014/07/scrapy-and-elasticsearch.html
Update 1:
Als jemand sagte mir, ich brauchte, um meinen Code zu den neuen Standards zu aktualisieren, was ich auch tat, aber es hat nicht ändern das Ergebnis:
from scrapy.spider import BaseSpider
from scrapy.selector import Selector
from bodybuilding.items import BodybuildingItem
class BodyBuildingSpider(BaseSpider):
name = "bodybuilding"
allowed_domains = ["forum.bodybuilding.nl"]
start_urls = [
"https://forum.bodybuilding.nl/fora/supplementen.22/"
]
def parse(self, response):
for sel in response.css('li.past.line.event-item'):
item = BodybuildingItem()
yield {'title': title.css('a.data-previewUrl::text').extract_first()}
yield item
Letztes Update mit fix
Nach einiger guten Hilfe habe ich es endlich mit dieser Spinne arbeiten:
import scrapy
class BlogSpider(scrapy.Spider):
name = 'bodybuilding'
start_urls = ['https://forum.bodybuilding.nl/fora/supplementen.22/']
def parse(self, response):
for title in response.css('h3.title'):
yield {'title': title.css('a::text').extract_first()}
next_page_url = response.xpath("//a[text()='Volgende >']/@href").extract_first()
if next_page_url:
yield response.follow(next_page_url, callback=self.parse)
Sie sollte 'response.css ('li.past.line.event-item')' verwenden und es gibt keine Notwendigkeit für 'responseSelector = Selector (response)'. Auch das CSS, das du verwendest, ist nicht mehr gültig, also musst du diese zuerst auf der neuesten Webseite aktualisieren –
Ich denke, ich habe es jetzt alles aktualisiert, immer noch nichts. Siehe Aktualisierung. – Nerotix
Das Problem ist, es gibt nichts auf der Seite, die 'li.past.line.event-item' entspricht –