ScrapySlash“；面具“；404

我有一些问题，试图管理404响应与我的蜘蛛。看起来ScrapySlash用200屏蔽了404响应

这是我的密码

def buildRequest(self, url, dbid):
     request = Request(url, self.parse, meta={
                  'splash': {
                      'args':{
                          'html': 1,
                          'wait': 5
                          },
                      'magic_response':True,
                      },
                 'dbId': dbid
                  }, errback=self.errback_httpbin, dont_filter=True)
     return request

一个简单的

打印响应。状态总是显示200。使用
scrapy shell测试我的url将显示
response

当我使用请求对象时，我的爬行器将转到
self.errback\u httpbin
方法，但使用SpaslRequest不会。SlashRequest正确处理502，但不能正确处理404

谢谢
看来您只能通过将
/execute
响应与“magic responses”（默认情况下处于启用状态）结合使用来实现这一点：

meta['splash']['magic_response']
-设置为True和JSON时
从Splash接收响应，这是响应的几个属性
（标题、正文、url、状态代码）使用中返回的数据填充
JSON:


response.headers由“
headers
”键填充
已设置response.url
指向“
url
”键的值
response.body设置为“
html
”的值
键，或“body”键的base64解码值
response.status已设置
输入“
http\u status
”键的值。（……）

如果使用
SplashRequest
，此选项默认设置为
True

其他端点，如
/render.html
和
/render.json
将为来自远程服务器的4xx和5xx响应返回502个坏网关（待检查）

在此基础上：

（注意末尾的表，返回url、标题、http_状态、html和cookies。）

。。。当您将此脚本与
/execute
、
SplashRequest
和errback一起使用时，可以复制：

使用scrapy 1.3运行，您将得到以下结果：

$ scrapy crawl errback_example
2017-01-11 18:07:20 [scrapy.utils.log] INFO: Scrapy 1.3.0 started (bot: test404)
(...)
2017-01-11 18:07:20 [scrapy.core.engine] INFO: Spider opened
(...)
2017-01-11 18:07:21 [scrapy.downloadermiddlewares.retry] DEBUG: Retrying <GET http://www.httpbin.org/status/500 via http://localhost:8050/execute> (failed 1 times): 500 Internal Server Error
2017-01-11 18:07:21 [scrapy.core.engine] DEBUG: Crawled (404) <GET http://www.httpbin.org/status/404 via http://localhost:8050/execute> (referer: None)
2017-01-11 18:07:21 [errback_example] ERROR: <twisted.python.failure.Failure scrapy.spidermiddlewares.httperror.HttpError: Ignoring non-200 response>
2017-01-11 18:07:21 [errback_example] ERROR: HttpError on http://www.httpbin.org/status/404
2017-01-11 18:07:21 [scrapy.downloadermiddlewares.retry] DEBUG: Retrying <GET http://www.httpbin.org/status/500 via http://localhost:8050/execute> (failed 2 times): 500 Internal Server Error
2017-01-11 18:07:21 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://www.httpbin.org/ via http://localhost:8050/execute> (referer: None)
2017-01-11 18:07:21 [scrapy.downloadermiddlewares.retry] DEBUG: Gave up retrying <GET http://www.httpbin.org/status/500 via http://localhost:8050/execute> (failed 3 times): 500 Internal Server Error
2017-01-11 18:07:21 [scrapy.core.engine] DEBUG: Crawled (500) <GET http://www.httpbin.org/status/500 via http://localhost:8050/execute> (referer: None)
2017-01-11 18:07:21 [errback_example] INFO: Got successful response from http://www.httpbin.org/
2017-01-11 18:07:21 [errback_example] ERROR: <twisted.python.failure.Failure scrapy.spidermiddlewares.httperror.HttpError: Ignoring non-200 response>
2017-01-11 18:07:21 [errback_example] ERROR: HttpError on http://www.httpbin.org/status/500
2017-01-11 18:07:21 [scrapy.core.engine] INFO: Closing spider (finished)
2017-01-11 18:07:21 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 5365,
 'downloader/request_count': 5,
 'downloader/request_method_count/POST': 5,
 'downloader/response_bytes': 17332,
 'downloader/response_count': 5,
 'downloader/response_status_count/200': 1,
 'downloader/response_status_count/400': 4,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2017, 1, 11, 17, 7, 21, 715440),
 'log_count/DEBUG': 7,
 'log_count/ERROR': 4,
 'log_count/INFO': 8,
 'response_received_count': 3,
 'scheduler/dequeued': 8,
 'scheduler/dequeued/memory': 8,
 'scheduler/enqueued': 8,
 'scheduler/enqueued/memory': 8,
 'splash/execute/request_count': 3,
 'splash/execute/response_count/200': 1,
 'splash/execute/response_count/400': 4,
 'start_time': datetime.datetime(2017, 1, 11, 17, 7, 20, 683232)}
2017-01-11 18:07:21 [scrapy.core.engine] INFO: Spider closed (finished)

$scrapy crawl errback\u示例
2017-01-11 18:07:20[scrapy.utils.log]信息：scrapy 1.3.0已启动（bot:test404）
(...)
2017-01-11 18:07:20[刮屑.堆芯.发动机]信息：卡盘已打开
(...)
2017-01-11 18:07:21[scrapy.DownloaderMiddleware.retry]调试：重试（失败1次）：500个内部服务器错误
2017-01-11 18:07:21[scrapy.core.engine]调试：爬网（404）（参考：无）
2017-01-11 18:07:21[错误示例]错误：
2017-01-11 18:07:21[errback_示例]错误：HttpError onhttp://www.httpbin.org/status/404
2017-01-11 18:07:21[scrapy.downloadermiddleware.retry]调试：重试（失败2次）：500内部服务器错误
2017-01-11 18:07:21[刮屑核心引擎]调试：爬网（200）（参考：无）
2017-01-11 18:07:21[scrapy.DownloaderMiddleware.retry]调试：放弃重试（失败3次）：500内部服务器错误
2017-01-11 18:07:21[刮屑核心引擎]调试：爬网（500）（参考：无）
2017-01-11 18:07:21[errback_示例]信息：获得来自的成功响应http://www.httpbin.org/
2017-01-11 18:07:21[错误示例]错误：
2017-01-11 18:07:21[errback_示例]错误：HttpError onhttp://www.httpbin.org/status/500
2017-01-11 18:07:21[刮屑芯发动机]信息：关闭卡盘（已完成）
2017-01-11 18:07:21[scrapy.StatCollectors]信息：倾销scrapy统计数据：
{'downloader/request_bytes'：5365，
“下载程序/请求计数”：5，
“下载程序/请求方法/计数/发布”：5，
“downloader/response_字节”：17332，
“下载程序/响应计数”：5，
“下载程序/响应状态\计数/200”：1，
“下载程序/响应状态\计数/400”：4，
“完成原因”：“完成”，
“完成时间”：datetime.datetime（2017,1,11,17,7,21,715440），
“日志计数/调试”：7，
“日志计数/错误”：4，
“日志计数/信息”：8，
“收到的响应数”：3，
“调度程序/出列”：8，
“调度程序/出列/内存”：8，
“调度程序/排队”：8，
“调度程序/排队/内存”：8，
“启动/执行/请求计数”：3，
“启动/执行/响应计数/200”：1，
“启动/执行/响应计数/400”：4，
“开始时间”：datetime.datetime（2017,1,11,17,7,20683232）}
2017-01-11 18:07:21[刮屑堆芯发动机]信息：十字轴关闭（完成）

调用errback时，
[errback\u example]ERROR
行显示错误，即，这里您可以看到404和500通过errback方法传递。
非常感谢
import scrapy

from scrapy.spidermiddlewares.httperror import HttpError
from twisted.internet.error import DNSLookupError
from twisted.internet.error import TimeoutError, TCPTimedOutError

from scrapy_splash import SplashRequest

script = """
function main(splash)
  splash:init_cookies(splash.args.cookies)
  assert(splash:go{
    splash.args.url,
    headers=splash.args.headers,
    http_method=splash.args.http_method,
    body=splash.args.body,
    })
  assert(splash:wait(0.5))

  local entries = splash:history()
  local last_response = entries[#entries].response
  return {
    url = splash:url(),
    headers = last_response.headers,
    http_status = last_response.status,
    cookies = splash:get_cookies(),
    html = splash:html(),
  }
end
"""

class ErrbackSpider(scrapy.Spider):
    name = "errback_example"
    start_urls = [
        "http://www.httpbin.org/",              # HTTP 200 expected
        "http://www.httpbin.org/status/404",    # Not found error
        "http://www.httpbin.org/status/500",    # server issue
    ]

    def start_requests(self):
        for u in self.start_urls:
            yield SplashRequest(u, callback=self.parse_httpbin,
                                   errback=self.errback_httpbin,
                                   endpoint='execute',
                                   args={'lua_source': script})

    def parse_httpbin(self, response):
        self.logger.info('Got successful response from {}'.format(response.url))
        # do something useful here...

    def errback_httpbin(self, failure):
        # log all failures
        self.logger.error(repr(failure))

        # in case you want to do something special for some errors,
        # you may need the failure's type:

        if failure.check(HttpError):
            # these exceptions come from HttpError spider middleware
            # you can get the non-200 response
            response = failure.value.response
            self.logger.error('HttpError on %s', response.url)

        elif failure.check(DNSLookupError):
            # this is the original request
            request = failure.request
            self.logger.error('DNSLookupError on %s', request.url)

        elif failure.check(TimeoutError, TCPTimedOutError):
            request = failure.request
            self.logger.error('TimeoutError on %s', request.url)

$ scrapy crawl errback_example
2017-01-11 18:07:20 [scrapy.utils.log] INFO: Scrapy 1.3.0 started (bot: test404)
(...)
2017-01-11 18:07:20 [scrapy.core.engine] INFO: Spider opened
(...)
2017-01-11 18:07:21 [scrapy.downloadermiddlewares.retry] DEBUG: Retrying <GET http://www.httpbin.org/status/500 via http://localhost:8050/execute> (failed 1 times): 500 Internal Server Error
2017-01-11 18:07:21 [scrapy.core.engine] DEBUG: Crawled (404) <GET http://www.httpbin.org/status/404 via http://localhost:8050/execute> (referer: None)
2017-01-11 18:07:21 [errback_example] ERROR: <twisted.python.failure.Failure scrapy.spidermiddlewares.httperror.HttpError: Ignoring non-200 response>
2017-01-11 18:07:21 [errback_example] ERROR: HttpError on http://www.httpbin.org/status/404
2017-01-11 18:07:21 [scrapy.downloadermiddlewares.retry] DEBUG: Retrying <GET http://www.httpbin.org/status/500 via http://localhost:8050/execute> (failed 2 times): 500 Internal Server Error
2017-01-11 18:07:21 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://www.httpbin.org/ via http://localhost:8050/execute> (referer: None)
2017-01-11 18:07:21 [scrapy.downloadermiddlewares.retry] DEBUG: Gave up retrying <GET http://www.httpbin.org/status/500 via http://localhost:8050/execute> (failed 3 times): 500 Internal Server Error
2017-01-11 18:07:21 [scrapy.core.engine] DEBUG: Crawled (500) <GET http://www.httpbin.org/status/500 via http://localhost:8050/execute> (referer: None)
2017-01-11 18:07:21 [errback_example] INFO: Got successful response from http://www.httpbin.org/
2017-01-11 18:07:21 [errback_example] ERROR: <twisted.python.failure.Failure scrapy.spidermiddlewares.httperror.HttpError: Ignoring non-200 response>
2017-01-11 18:07:21 [errback_example] ERROR: HttpError on http://www.httpbin.org/status/500
2017-01-11 18:07:21 [scrapy.core.engine] INFO: Closing spider (finished)
2017-01-11 18:07:21 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 5365,
 'downloader/request_count': 5,
 'downloader/request_method_count/POST': 5,
 'downloader/response_bytes': 17332,
 'downloader/response_count': 5,
 'downloader/response_status_count/200': 1,
 'downloader/response_status_count/400': 4,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2017, 1, 11, 17, 7, 21, 715440),
 'log_count/DEBUG': 7,
 'log_count/ERROR': 4,
 'log_count/INFO': 8,
 'response_received_count': 3,
 'scheduler/dequeued': 8,
 'scheduler/dequeued/memory': 8,
 'scheduler/enqueued': 8,
 'scheduler/enqueued/memory': 8,
 'splash/execute/request_count': 3,
 'splash/execute/response_count/200': 1,
 'splash/execute/response_count/400': 4,
 'start_time': datetime.datetime(2017, 1, 11, 17, 7, 20, 683232)}
2017-01-11 18:07:21 [scrapy.core.engine] INFO: Spider closed (finished)