scrapy 如何在Scrappy中从列表中循环URL并只输出要下载到XML/TXT文件中的响应正文

pdtvr36n 于 2022-11-09 发布在其他

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我有这个问题，我已经尝试了管道方法，但我不确定我是否做得正确的基础上教程，因为大多数挑选一些部分从response.body使用选择器。
然而，我可以在一个单独的脚本上解析它，该脚本提供了我所需要的所有数据，因为这些数据被其他变量弄乱了。
当它是一个单一的URL时我可以这样做，但是当我引入不同的URL时它会覆盖最终的解析。我相信如果我只需要response. body，可能会有一个更简单的解决方案，而不使用管道/Items.py。
请原谅上面的压痕，因为很难复制。

linkarr = df['URLOUT'].tolist()
today = datetime.today().strftime('%Y%m%d')

class MpvticketSpider(scrapy.Spider):

    name = 'mpvticket'   
    start_urls = url
    handle_httpstatus_list = [403,502,503,404]

    def start_requests(self):

        for url in linkarr:

            eventid = str(url).strip().split("pid=")[1].split("&")[0]
            filename_xml = str(eventid) + "_" + str(today) + ".xml"
            filename_txt = str(eventid) + "_" + str(today) + ".txt"

            print("\n FIRST  URL BEING RUN: ",url)
            pid = str(url).split("pid=")[1].split('&')[0]
            username = 'XXXX'
            password = 'XXXX'
            port = 22225
            session_id = random.random()
            super_proxy_url = ('http://%s-country-us-session-%s:%s@zproxy.lum-superproxy.io:%d' %
                (username, session_id, password, port))

            headers = {
                'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
                'accept-language': 'en-US,en;q=0.9',
                'cache-control': 'max-age=0',
                'referer': 'https://www.mlb.com/',
                'sec-ch-ua': '".Not/A)Brand";v="99", "Google Chrome";v="103", "Chromium";v="103"',
                'sec-ch-ua-mobile': '?0',
                'sec-ch-ua-platform': '"Windows"',
                'sec-fetch-dest': 'document',
                'sec-fetch-mode': 'navigate',
                'sec-fetch-site': 'same-origin',
                'sec-fetch-user': '?1',
                'upgrade-insecure-requests': '1',
                'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36',
            }
            yield scrapy.Request(url, callback=self.parse_api,meta={'proxy': super_proxy_url},headers=headers)

        def parse_api(self,response):
            item = TicketsItem()    
            raw_data = response.body
            soup = BeautifulSoup(raw_data,'lxml')
            item['data'] = soup
            yield item
            #Commented portion was the original method. But overwrote my Output.xml
            #try:
            #    with open(filename_xml, "w") as f:
            #        f.write(str(soup))
            #except:
            #    with open(filename_txt, 'w') as f:
            #            f.write(str(soup))

if __name__ == '__main__':
    process = CrawlerProcess()
    process.crawl(MpvticketSpider)
    process.start()

UPDATE:

Imports

import scrapy
from scrapy.crawler import CrawlerProcess
from scrapy.utils.project import get_project_settings
from sys import path
from scrapy.loader import itemloaders
path.append(r'D:\Projects\tickets')
from tickets.items import TicketsItem

class MpvticketSpider(scrapy.Spider):

name = 'mpvticket'   
handle_httpstatus_list = [403,502,503,404]

def start_requests(self):

    #for url in linkarr:
    url = 'https://mpv.tickets.com/api/pvodc/v1/events/navmap/availability/?pid=9016692&agency=MLB_MPV&orgId=10&supportsVoucherRedemption=true'

    print("\n FIRST  URL BEING RUN: ",url)
    username = 'XXXX'
    password = 'XXXX'
    port = 22225
    session_id = random.random()
    super_proxy_url = ('http://%s-country-us-session-%s:%s@zproxy.lum-superproxy.io:%d' %
    (username, session_id, password, port))

    headers = {
               #headers 
    }

    yield scrapy.Request(url, callback=self.parse_api,meta={'proxy': super_proxy_url})

def parse_api(self,response):
    url = response.url
    eventid = str(url).strip().split("pid=")[1].split("&")[0] 
    filename_xml = str(eventid) + "_" + str(today) + ".xml"
    data = response.xpath("//body")
    item = TicketsItem()
    item['data'] = data
    item['filename_xml'] = filename_xml
    yield item

Pipelines.py

from re import I
from itemadapter import ItemAdapter
import scrapy
from scrapy.exceptions import DropItem
from scrapy.pipelines.files import FilesPipeline

class TicketsPipeline:

def process_item(self, item, spider):
    for filename in item['filename_xml']:
        with open(filename, "w") as fd:
            fd.write(item['data'])

raise DropItem

item.py

import scrapy
from scrapy.loader import itemloaders
from itemloaders.processors import MapCompose

class TicketsItem(scrapy.Item):
filename_xml = scrapy.Field()
data = scrapy.Field()

Not sure what Is wrong but I am now getting the following error:

Traceback (most recent call last):
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\crawler.py", line 206, in crawl
    return self._crawl(crawler, *args,**kwargs)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\crawler.py", line 210, in _crawl
    d = crawler.crawl(*args,**kwargs)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\twisted\internet\defer.py", line 1905, in unwindGenerator
    return _cancellableInlineCallbacks(gen)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\twisted\internet\defer.py", line 1815, in _cancellableInlineCallbacks
    _inlineCallbacks(None, gen, status)
--- <exception caught here> ---
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\twisted\internet\defer.py", line 1660, in _inlineCallbacks
    result = current_context.run(gen.send, result)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\crawler.py", line 102, in crawl
    self.engine = self._create_engine()
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\crawler.py", line 116, in _create_engine
    return ExecutionEngine(self, lambda _: self.stop())
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\core\engine.py", line 84, in __init__
    self.scraper = Scraper(crawler)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\core\scraper.py", line 75, in __init__
    self.itemproc = itemproc_cls.from_crawler(crawler)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\middleware.py", line 59, in from_crawler
    return cls.from_settings(crawler.settings, crawler)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\middleware.py", line 40, in from_settings
    mwcls = load_object(clspath)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\site-packages\scrapy\utils\misc.py", line 61, in load_object
    mod = import_module(module)
  File "C:\Users\User\AppData\Local\Programs\Python\Python310\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load

  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked

  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked

  File "<frozen importlib._bootstrap_external>", line 883, in exec_module

  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed

  File "D:\Projects\tickets\tickets\pipelines.py", line 15, in <module>
    class TicketsPipeline:
  File "D:\Projects\tickets\tickets\pipelines.py", line 22, in TicketsPipeline
    raise DropItem
scrapy.exceptions.DropItem:

scrapy

来源：https://stackoverflow.com/questions/72788822/how-to-loop-url-from-a-list-in-scrappy-and-output-only-the-response-body-to-be-d

1条答案

按热度按时间

xhv8bpkk1#

您应该将文件名/输出路径的逻辑移到解析方法中，然后将其作为字段添加到生成的项中。然后，在项管道中，您可以将正文保存到输出路径并删除该项，因为此时不需要进一步处理。
因此将您parse方法更改为如下所示：

def parse_api(self,response):
    url = response.url
    eventid = str(url).strip().split("pid=")[1].split("&")[0] 
    filename_xml = str(eventid) + "_" + str(today) + ".xml"
    data = response.xpath("//body").get()
    item = TicketsItem()
    item.data = data
    item.filename_xml = filename_xml
    yield item

您需要将项目更改为类似以下的内容：

class TicketsItem(scrapy.Item):
    filename_xml = scrapy.Field()
    data = scrapy.Field()

然后，您的项目管道可能如下所示：

from scrapy.exceptions import DropItem

class SpiderPipeline:

    def process_item(self, item, spider):
        with open(item["filename_xml"], "w") as fd:
            fd.write(item.data)
        raise DropItem

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scrapy 如何在Scrappy中从列表中循环URL并只输出要下载到XML/TXT文件中的响应正文

Imports

class MpvticketSpider(scrapy.Spider):

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