[英]Python Scrapy Login and Crawl Multiple Pages
我正在創建一個腳本來抓取 kenpom.com 以捕獲大學籃球統計數據。 我在 Python 和 Scrapy 上變得更好,這主要歸功於 Stack Overflow 上的社區。 非常感謝你!
我已經能夠通過 scrapy 成功登錄該網站,但我無法弄清楚如何登錄然后抓取多個頁面。 似乎腳本每次點擊新頁面時都在嘗試登錄。
我必須進行哪些更改才能登錄,通過日期范圍抓取 select 個頁面,然后抓取所需的數據?
提前致謝!
這是我的蜘蛛:
import scrapy
from scrapy.http import FormRequest
from datetime import timedelta, date
class KenpomeffSpider(scrapy.Spider):
name = 'kenpomeff'
allowed_domains = ['kenpom.com']
start_urls = ['https://kenpom.com/']
def login(self, response):
return FormRequest.from_response(response,
formdata={'password': 'xxx',
'email': 'xxx@gmail.com'},
callback=self.date_range)
def daterange(start_date, end_date):
for n in range(int((end_date - start_date).days)):
yield start_date + timedelta(n)
start_date = date(2020, 11, 25)
end_date = date(2020, 12, 2)
start_urls = []
start_url='https://kenpom.com/archive.php?d='
for single_date in daterange(start_date, end_date):
start_urls.append(single_date.strftime(start_url+"%Y-%m-%d"))
def parse(self, response):
Output:
2020-12-02 12:00:28 [scrapy.utils.log] INFO: Scrapy 2.3.0 started (bot: kenpom)
2020-12-02 12:00:28 [scrapy.utils.log] INFO: Versions: lxml 4.5.2.0, libxml2 2.9.5, cssselect 1.1.0, parsel 1.5.2, w3lib 1.21.0, Twisted 20.3.0, Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:37:02) [MSC v.1924 64 bit (AMD64)], pyOpenSSL 19.0.0 (OpenSSL 1.1.1g 21 Apr 2020), cryptography 3.0, Platform Windows-10-10.0.17134-SP0
2020-12-02 12:00:28 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.selectreactor.SelectReactor
2020-12-02 12:00:28 [scrapy.crawler] INFO: Overridden settings:
{'BOT_NAME': 'kenpom',
'NEWSPIDER_MODULE': 'kenpom.spiders',
'ROBOTSTXT_OBEY': True,
'SPIDER_MODULES': ['kenpom.spiders']}
2020-12-02 12:00:28 [scrapy.extensions.telnet] INFO: Telnet Password: 500ce7baaae78688
2020-12-02 12:00:28 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
'scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.logstats.LogStats']
2020-12-02 12:00:28 [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']
2020-12-02 12:00:28 [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']
2020-12-02 12:00:28 [scrapy.middleware] INFO: Enabled item pipelines:
['kenpom.pipelines.KenpomPipeline']
2020-12-02 12:00:28 [scrapy.core.engine] INFO: Spider opened
2020-12-02 12:00:28 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2020-12-02 12:00:28 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2020-12-02 12:00:28 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://kenpom.com/robots.txt> (referer: None)
2020-12-02 12:00:28 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://kenpom.com/register.php?frompage=1> from <GET https://kenpom.com/archive.php?d=2020-11-25>
2020-12-02 12:00:28 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://kenpom.com/register.php?frompage=1> (referer: None)
2020-12-02 12:00:29 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://kenpom.com/register.php?frompage=1> from <GET https://kenpom.com/archive.php?d=2020-11-26>
2020-12-02 12:00:29 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://kenpom.com/register.php?frompage=1> from <GET https://kenpom.com/archive.php?d=2020-11-27>
2020-12-02 12:00:29 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://kenpom.com/register.php?frompage=1> from <GET https://kenpom.com/archive.php?d=2020-11-28>
2020-12-02 12:00:29 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://kenpom.com/register.php?frompage=1> from <GET https://kenpom.com/archive.php?d=2020-11-30>
2020-12-02 12:00:29 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://kenpom.com/register.php?frompage=1> from <GET https://kenpom.com/archive.php?d=2020-11-29>
2020-12-02 12:00:29 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://kenpom.com/register.php?frompage=1> from <GET https://kenpom.com/archive.php?d=2020-12-01>
2020-12-02 12:00:29 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://kenpom.com/register.php?frompage=1> (referer: None)
2020-12-02 12:00:29 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://kenpom.com/register.php?frompage=1> (referer: None)
2020-12-02 12:00:29 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://kenpom.com/register.php?frompage=1> (referer: None)
2020-12-02 12:00:29 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://kenpom.com/register.php?frompage=1> (referer: None)
2020-12-02 12:00:29 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://kenpom.com/register.php?frompage=1> (referer: None)
2020-12-02 12:00:29 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://kenpom.com/register.php?frompage=1> (referer: None)
2020-12-02 12:00:29 [scrapy.core.engine] INFO: Closing spider (finished)
2020-12-02 12:00:29 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 4322,
'downloader/request_count': 15,
'downloader/request_method_count/GET': 15,
'downloader/response_bytes': 124755,
'downloader/response_count': 15,
'downloader/response_status_count/200': 8,
'downloader/response_status_count/302': 7,
'elapsed_time_seconds': 0.494702,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2020, 12, 2, 18, 0, 29, 208958),
'log_count/DEBUG': 15,
'log_count/INFO': 10,
'response_received_count': 8,
'robotstxt/request_count': 1,
'robotstxt/response_count': 1,
'robotstxt/response_status_count/200': 1,
'scheduler/dequeued': 14,
'scheduler/dequeued/memory': 14,
'scheduler/enqueued': 14,
'scheduler/enqueued/memory': 14,
'start_time': datetime.datetime(2020, 12, 2, 18, 0, 28, 714256)}
2020-12-02 12:00:29 [scrapy.core.engine] INFO: Spider closed (finished)
您的代碼中根本沒有登錄(根據您的調試輸出)。 試試這個版本:
import scrapy
from scrapy.http import FormRequest
from datetime import timedelta, date
def daterange(start_date, end_date):
for n in range(int((end_date - start_date).days)):
yield start_date + timedelta(n)
class KenpomeffSpider(scrapy.Spider):
name = 'kenpomeff'
allowed_domains = ['kenpom.com']
start_urls = ['https://kenpom.com/']
def parse(self, response):
yield FormRequest.from_response(
response=response,
formid="login",
formdata={
'password': 'xxx',
'email': 'xxx@gmail.com'
},
callback=self.check_login,
)
def check_login(self, response):
# here you better need to check login success
# like:
# if response.xpath('//some/element/on/success/login/page'):
start_date = date(2020, 11, 25)
end_date = date(2020, 12, 2)
start_urls = []
start_url='https://kenpom.com/archive.php?d='
for single_date in daterange(start_date, end_date):
yield scrapy.Request(
url=start_url + single_date.strftime("%Y-%m-%d"),
callback=self.parse_date,
)
def parse_date(self, response):
...
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