python scrapy FormRequest.FormResponse 没有给出任何输出
python scrapy FormRequest.FormResponse not giving any output
对编码非常陌生，对 scrapy 尤其陌生。
我有一个用“scrapy”写的简单刮板。我写它是希望产生一个选项列表（来自 'x' 元素）。但它不提供任何东西。我尝试了 this 但未能在解决我面临的问题方面取得任何进展。
我正在粘贴完整的代码，然后是完整的输出。
（注意：在 setting.py 中，我已将 robottext=True 更改为 robottext 为 False）
from scrapy import FormRequest
import scrapy
class FillFormSpider(scrapy.Spider):
name = 'fill_form'
allowed_domains = ['citizen.mahapolice.gov.in/Citizen/MH/PublishedFIRs.aspx']
start_urls = ['http://citizen.mahapolice.gov.in/Citizen/MH/PublishedFIRs.aspx/']
def parse(self, response):
yield FormRequest.from_response(
response,
formid='form1',
formdata={
'ctl00$ContentPlaceHolder1$txtDateOfRegistrationFrom': "01/07/2020",
'ContentPlaceHolder1_txtDateOfRegistrationTo': "03/07/2020",
'ctl00$ContentPlaceHolder1$ddlDistrict': "19372"},
callback=(self.after_login)
)
def after_login(self, response):
print(response.xpath('//*[@id="ContentPlaceHolder1_ddlPoliceStation"]/text()'))
并且在 运行 命令 scrapy crawl spider_name:
之后输出到终端
2020-07-12 21:32:21 [scrapy.utils.log] INFO: Scrapy 2.2.0 started (bot: maha_police)
2020-07-12 21:32:21 [scrapy.utils.log] INFO: Versions: lxml 4.5.0.0, libxml2 2.9.10, cssselect 1.1.0, parsel 1.6.0, w3lib 1.22.0, Twisted 20.3.0, Python 3.8.2 (default, Apr 27 2020, 15:53:34) - [GCC 9.3.0], pyOpenSSL 19.1.0 (OpenSSL 1.1.1f 31 Mar 2020), cryptography 2.8, Platform Linux-5.4.0-40-generic-x86_64-with-glibc2.29
2020-07-12 21:32:21 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.epollreactor.EPollReactor
2020-07-12 21:32:21 [scrapy.crawler] INFO: Overridden settings:
{'BOT_NAME': 'maha_police',
'NEWSPIDER_MODULE': 'maha_police.spiders',
'SPIDER_MODULES': ['maha_police.spiders']}
2020-07-12 21:32:21 [scrapy.extensions.telnet] INFO: Telnet Password: 02d86496f7d27542
2020-07-12 21:32:21 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
'scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.memusage.MemoryUsage',
'scrapy.extensions.logstats.LogStats']
2020-07-12 21:32:22 [scrapy.middleware] INFO: Enabled downloader middlewares:
['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']
2020-07-12 21:32:22 [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']
2020-07-12 21:32:22 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2020-07-12 21:32:22 [scrapy.core.engine] INFO: Spider opened
2020-07-12 21:32:22 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2020-07-12 21:32:22 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2020-07-12 21:32:25 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://citizen.mahapolice.gov.in/Citizen/MH/index.aspx> from <GET http://citizen.mahapolice.gov.in/Citizen/MH/PublishedFIRs.aspx/>
2020-07-12 21:32:25 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://citizen.mahapolice.gov.in/Citizen/MH/index.aspx> (referer: None)
2020-07-12 21:32:26 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'citizen.mahapolice.gov.in': <POST https://citizen.mahapolice.gov.in/Citizen/MH/index.aspx>
2020-07-12 21:32:26 [scrapy.core.engine] INFO: Closing spider (finished)
2020-07-12 21:32:26 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 501,
'downloader/request_count': 2,
'downloader/request_method_count/GET': 2,
'downloader/response_bytes': 8149,
'downloader/response_count': 2,
'downloader/response_status_count/200': 1,
'downloader/response_status_count/302': 1,
'elapsed_time_seconds': 3.542722,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2020, 7, 12, 16, 2, 26, 43681),
'log_count/DEBUG': 3,
'log_count/INFO': 10,
'memusage/max': 54427648,
'memusage/startup': 54427648,
'offsite/domains': 1,
'offsite/filtered': 1,
'request_depth_max': 1,
'response_received_count': 1,
'scheduler/dequeued': 2,
'scheduler/dequeued/memory': 2,
'scheduler/enqueued': 2,
'scheduler/enqueued/memory': 2,
'start_time': datetime.datetime(2020, 7, 12, 16, 2, 22, 500959)}
我想获取警察局列表。所以我试图从相关元素中提取文本。我哪里错了？另外我想点击搜索，我应该如何进行？感谢您的帮助。
正如您在这一行中所见：
2020-07-12 21:32:26 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'citizen.mahapolice.gov.in': <POST https://citizen.mahapolice.gov.in/Citizen/MH/index.aspx>
正在过滤您的请求。在您的情况下，因为它被过滤，因为它被 OffsiteMiddleware 视为异地。我建议您将 allowed_domains 更改为：
allowed_domains = ['citizen.mahapolice.gov.in/Citizen/MH/PublishedFIRs.aspx']
至：
allowed_domains = ['citizen.mahapolice.gov.in']
这个改变已经对我有用了，所以它是一个更好的解决方案。
如果您检查 docs，您会看到该字段应该包含允许此蜘蛛抓取的 域。
你的蜘蛛发生的事情是 OffsiteMiddleware 编译一个带有 allowed_domains 字段中的域的正则表达式，并在处理请求时检查方法 should_follow (code) 以了解是否应执行请求。正则表达式将 return None，它会导致它被过滤。
您也可以在构建请求时使用 dont_filter parameter，这也可以，但是上面的解决方案更好。它看起来像这样：
yield FormRequest.from_response(
response,
formid='form1',
formdata={
'ctl00$ContentPlaceHolder1$txtDateOfRegistrationFrom': "01/07/2020",
'ContentPlaceHolder1_txtDateOfRegistrationTo': "03/07/2020",
'ctl00$ContentPlaceHolder1$ddlDistrict': "19372"},
callback=self.after_login,
dont_filter=True, # <<< Here
)
对编码非常陌生，对 scrapy 尤其陌生。
我有一个用“scrapy”写的简单刮板。我写它是希望产生一个选项列表（来自 'x' 元素）。但它不提供任何东西。我尝试了 this 但未能在解决我面临的问题方面取得任何进展。
我正在粘贴完整的代码，然后是完整的输出。 （注意：在 setting.py 中，我已将 robottext=True 更改为 robottext 为 False）
from scrapy import FormRequest
import scrapy
class FillFormSpider(scrapy.Spider):
name = 'fill_form'
allowed_domains = ['citizen.mahapolice.gov.in/Citizen/MH/PublishedFIRs.aspx']
start_urls = ['http://citizen.mahapolice.gov.in/Citizen/MH/PublishedFIRs.aspx/']
def parse(self, response):
yield FormRequest.from_response(
response,
formid='form1',
formdata={
'ctl00$ContentPlaceHolder1$txtDateOfRegistrationFrom': "01/07/2020",
'ContentPlaceHolder1_txtDateOfRegistrationTo': "03/07/2020",
'ctl00$ContentPlaceHolder1$ddlDistrict': "19372"},
callback=(self.after_login)
)
def after_login(self, response):
print(response.xpath('//*[@id="ContentPlaceHolder1_ddlPoliceStation"]/text()'))
并且在 运行 命令 scrapy crawl spider_name:
2020-07-12 21:32:21 [scrapy.utils.log] INFO: Scrapy 2.2.0 started (bot: maha_police)
2020-07-12 21:32:21 [scrapy.utils.log] INFO: Versions: lxml 4.5.0.0, libxml2 2.9.10, cssselect 1.1.0, parsel 1.6.0, w3lib 1.22.0, Twisted 20.3.0, Python 3.8.2 (default, Apr 27 2020, 15:53:34) - [GCC 9.3.0], pyOpenSSL 19.1.0 (OpenSSL 1.1.1f 31 Mar 2020), cryptography 2.8, Platform Linux-5.4.0-40-generic-x86_64-with-glibc2.29
2020-07-12 21:32:21 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.epollreactor.EPollReactor
2020-07-12 21:32:21 [scrapy.crawler] INFO: Overridden settings:
{'BOT_NAME': 'maha_police',
'NEWSPIDER_MODULE': 'maha_police.spiders',
'SPIDER_MODULES': ['maha_police.spiders']}
2020-07-12 21:32:21 [scrapy.extensions.telnet] INFO: Telnet Password: 02d86496f7d27542
2020-07-12 21:32:21 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
'scrapy.extensions.telnet.TelnetConsole',
'scrapy.extensions.memusage.MemoryUsage',
'scrapy.extensions.logstats.LogStats']
2020-07-12 21:32:22 [scrapy.middleware] INFO: Enabled downloader middlewares:
['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']
2020-07-12 21:32:22 [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']
2020-07-12 21:32:22 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2020-07-12 21:32:22 [scrapy.core.engine] INFO: Spider opened
2020-07-12 21:32:22 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2020-07-12 21:32:22 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2020-07-12 21:32:25 [scrapy.downloadermiddlewares.redirect] DEBUG: Redirecting (302) to <GET https://citizen.mahapolice.gov.in/Citizen/MH/index.aspx> from <GET http://citizen.mahapolice.gov.in/Citizen/MH/PublishedFIRs.aspx/>
2020-07-12 21:32:25 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://citizen.mahapolice.gov.in/Citizen/MH/index.aspx> (referer: None)
2020-07-12 21:32:26 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'citizen.mahapolice.gov.in': <POST https://citizen.mahapolice.gov.in/Citizen/MH/index.aspx>
2020-07-12 21:32:26 [scrapy.core.engine] INFO: Closing spider (finished)
2020-07-12 21:32:26 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 501,
'downloader/request_count': 2,
'downloader/request_method_count/GET': 2,
'downloader/response_bytes': 8149,
'downloader/response_count': 2,
'downloader/response_status_count/200': 1,
'downloader/response_status_count/302': 1,
'elapsed_time_seconds': 3.542722,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2020, 7, 12, 16, 2, 26, 43681),
'log_count/DEBUG': 3,
'log_count/INFO': 10,
'memusage/max': 54427648,
'memusage/startup': 54427648,
'offsite/domains': 1,
'offsite/filtered': 1,
'request_depth_max': 1,
'response_received_count': 1,
'scheduler/dequeued': 2,
'scheduler/dequeued/memory': 2,
'scheduler/enqueued': 2,
'scheduler/enqueued/memory': 2,
'start_time': datetime.datetime(2020, 7, 12, 16, 2, 22, 500959)}
我想获取警察局列表。所以我试图从相关元素中提取文本。我哪里错了？另外我想点击搜索，我应该如何进行？感谢您的帮助。
正如您在这一行中所见：
2020-07-12 21:32:26 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'citizen.mahapolice.gov.in': <POST https://citizen.mahapolice.gov.in/Citizen/MH/index.aspx>
正在过滤您的请求。在您的情况下，因为它被过滤，因为它被 OffsiteMiddleware 视为异地。我建议您将 allowed_domains 更改为：
allowed_domains = ['citizen.mahapolice.gov.in/Citizen/MH/PublishedFIRs.aspx']
至：
allowed_domains = ['citizen.mahapolice.gov.in']
这个改变已经对我有用了，所以它是一个更好的解决方案。
如果您检查 docs，您会看到该字段应该包含允许此蜘蛛抓取的 域。
你的蜘蛛发生的事情是 OffsiteMiddleware 编译一个带有 allowed_domains 字段中的域的正则表达式，并在处理请求时检查方法 should_follow (code) 以了解是否应执行请求。正则表达式将 return None，它会导致它被过滤。
您也可以在构建请求时使用 dont_filter parameter，这也可以，但是上面的解决方案更好。它看起来像这样：
yield FormRequest.from_response(
response,
formid='form1',
formdata={
'ctl00$ContentPlaceHolder1$txtDateOfRegistrationFrom': "01/07/2020",
'ContentPlaceHolder1_txtDateOfRegistrationTo': "03/07/2020",
'ctl00$ContentPlaceHolder1$ddlDistrict': "19372"},
callback=self.after_login,
dont_filter=True, # <<< Here
)