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我知道這個問題被問了很多次,但它似乎永遠不會解決任何地方。我看了幾個主題,嘗試了所有建議,但都沒有成功。scrapy項目xampp mysql數據庫
問題是:爲什麼沒有存儲到我的本地數據庫?
我在刮一個網站,按照每個網站上的2個鏈接去刮更多的數據。 我已成功籤是:
- 如果我可以從我的spider.class
- 打印的項目,如果我的XPath是正確
- 如果我可以,如果我的管道我pipeline.class內打印
- 包括
- 如果查詢工作
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,
}
控制檯輸出
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)
我在輸出看到的是:
Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
我也試圖尋找這個問題,但我無法找到任何解決方案。 有什麼缺失?看起來很多人都有同樣的問題,而且從未解決。
沒有人有任何線索可能是錯誤的? 這個問題是可悲的永遠不會解決。 我想只有一個細節出了什麼問題。我希望anybode可以幫助 – kratze
升級到最新的scrapy,以確保它不是已解決的問題。 'pip安裝scrapy --force --update'。另外你什麼時候在items.py中有'close_spider'?此外,乳清你正在使用'except:continue'掩蓋問題。您應該捕獲異常並打印問題。如果你需要找到問題,那麼這樣的代碼不應該在那裏 –
你應該寫這個答案。編寫一個真正的例外的提示幫助我解決了這個問題。這只是我的SQL查詢中的一個錯誤。 非常感謝 – kratze