Question

我知道这个问题已被多次询问，但它似乎从未在任何地方得到解决。我查看了几个主题并尝试了所有建议而没有成功。

问题是：为什么没有任何东西存储到我的本地数据库中？

我正在抓一个网站，按照每个网站上的2个链接来搜索更多数据。我已经成功检查的是：

如果我可以从我的spider.class打印项目
如果我的xpath正确
如果我可以在我的pipeline.class中打印
如果包含我的管道
如果查询有效

mySpider.py

import scrapy
from mySpider.items import myItems

class bandSpider(scrapy.Spider):
    name = "info"

    def start_requests(self):
        urls = [ 'http://example.com' ]

        for url in urls:
            yield scrapy.Request(url=url, callback=self.parse)

    def parse(self, response):
        item = myItems()
        item['id']          =   response.xpath('//h1/a/@href').re_first(r'\d+')
        item['name']       =   response.xpath('//h1/a/text()').extract_first()
        item['logo']       =   response.xpath('//a[@id="logo"]/@href').extract()
        item['img']        =   response.xpath('//a[@id="photo"]/@href').extract()

        yield item

        # follow link
        yield scrapy.Request('https://example.com/page1' + response.xpath('//h1/a/@href').re_first(r'\d+'), callback=self.parse_page1)
        yield scrapy.Request('https://example.com/page2', callback=self.parse_page2)



    def parse_page1(self, response):
        item = myItems()
        item['comment']    =   response.xpath('//body//text()').extract()
        yield item

    def parse_page2(self, response):
        item = myItems()
        item['another']      =   response.css('a.link ::text').extract()
        yield item

pipelines.py

import scrapy
import pymysql

class MyspiderPipeline(object):

    def __init__(self):
        self.conn = pymysql.connect(host='localhost', user='root', password='', database='mydb', charset='utf8')
        self.cursor = self.conn.cursor()
        self.conn.autocommit(True)

    def process_item(self, item, spider):
        for i in range(5):
            try:
                self.cursor.execute("""INSERT INTO `tablename` ( `id`, `name` , `logo` , `img` , `comment` )
                                VALUES ( %s , %s , %s , %s , %s )  ON DUPLICATE KEY UPDATE name = name, logo = logo, img = img, comment = comment""",(item['id'].encode('utf-8'), item["name"].encode('utf-8'), item["logo".encode('utf-8')], item["img"].encode('utf-8'), item["comment"].encode('utf-8')))

            except:
                continue

items.py

import scrapy

class bandinfo(scrapy.Item):
    # define the fields for your item here like:
    id = scrapy.Field()
    name = scrapy.Field()
    logo = scrapy.Field()
    img = scrapy.Field()
    comment = scrapy.Field()
    another = scrapy.Field()

    return item

    def close_spider(self, spider):
        self.cursor.close()
        self.conn.close()

settings.py

BOT_NAME = 'mySpider'

SPIDER_MODULES = ['mySpider.spiders']
NEWSPIDER_MODULE = 'mySpider.spiders'

ROBOTSTXT_OBEY = True

COOKIES_ENABLED = False

ITEM_PIPELINES = {
    'mySpider.pipelines.MyspiderPipeline': 300,
}

控制台输出

PS \scrapy\mySpider> scrapy crawl info
2017-09-14 11:29:55 [scrapy.utils.log] INFO: Scrapy 1.4.0 started (bot: mySpider)
2017-09-14 11:29:55 [scrapy.utils.log] INFO: Overridden settings: {'BOT_NAME': 'mySpider', 'COOKIES_ENABLED': False, 'NEWSPIDER_MODULE': 'mySpider.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['mySpider.spiders']}
2017-09-14 11:29:55 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.logstats.LogStats']
2017-09-14 11:29:55 [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.httpproxy.HttpProxyMiddleware',
 'scrapy.downloadermiddlewares.stats.DownloaderStats']
2017-09-14 11:29:55 [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']
2017-09-14 11:29:55 [scrapy.middleware] INFO: Enabled item pipelines:
['mySpider.pipelines.MyspiderPipeline']
2017-09-14 11:29:55 [scrapy.core.engine] INFO: Spider opened
2017-09-14 11:29:55 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2017-09-14 11:29:55 [scrapy.extensions.telnet] DEBUG: Telnet console listening on 127.0.0.1:6023
2017-09-14 11:29:56 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://example.com/robots.txt> (referer: None)
2017-09-14 11:29:56 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://example.com> (referer: None)
2017-09-14 11:29:57 [scrapy.core.scraper] DEBUG: Scraped from <200 https://example.com/img.jpeg>
{'img': ['https://example.com/img.jpeg'],
 'logo': ['https://example.com/logo.jpeg'],
 'name': 'any name',
 'id': '546',
2017-09-14 11:29:57 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://example.com/page1> (referer: https://example.com )
2017-09-14 11:29:57 [scrapy.core.scraper] DEBUG: Scraped from <200 https://example.com/page1>
{'comment': ['tons of text'}
2017-09-14 11:29:57 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://example.com/page2> (referer: https://example.com )
2017-09-14 11:29:57 [scrapy.core.scraper] DEBUG: Scraped from <200 https://example.com/page2>
{'another': ['tons of text']}
2017-09-14 11:29:57 [scrapy.core.engine] INFO: Closing spider (finished)
2017-09-14 11:29:57 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 1101,
 'downloader/request_count': 4,
 'downloader/request_method_count/GET': 4,
 'downloader/response_bytes': 10979,
 'downloader/response_count': 4,
 'downloader/response_status_count/200': 4,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2017, 9, 14, 9, 29, 57, 981309),
 'item_scraped_count': 3,
 'log_count/DEBUG': 8,
 'log_count/INFO': 7,
 'request_depth_max': 1,
 'response_received_count': 4,
 'scheduler/dequeued': 3,
 'scheduler/dequeued/memory': 3,
 'scheduler/enqueued': 3,
 'scheduler/enqueued/memory': 3,
 'start_time': datetime.datetime(2017, 9, 14, 9, 29, 55, 590397)}
2017-09-14 11:29:57 [scrapy.core.engine] INFO: Spider closed (finished)

我在输出中看到的是：

Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)

我也试图搜索这个问题，但我找不到任何解决方案。有什么遗失？似乎很多人都有同样的问题而且从未解决过。

Answer 1

升级到最新的scrapy只是为了确保它不是已经解决的问题。

pip install scrapy --force --update

为什么你在items.py中有close_spider？

为什么要使用except:和continue屏蔽问题？

您应该捕获异常并打印问题。该异常将告知查询是否失败

scrapy项目到xampp mysql数据库

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