1. 首頁
  2. 問答
  3. 附加cookie請求

附加cookie請求

2016-04-14 91 views
2

我試圖從Castorama網站上獲得工具的價格。但到目前爲止，我在建設正確的請求方面遇到了問題。附加cookie請求

http://www.castorama.pl/produkty/narzedzia-i-artykuly/elektronarzedzia-przenosne-i-akcesoria/szlifierki-i-polerki/szlifierki-oscylacyjne/szlifierka-oscylacyjna-pp-110w.html

不幸的是，這並不容易。價格取決於商店的本地化。在獲得價格之前，您需要定義您的商店本地化。在網站上，我點擊'ZOBACZ CENĘ'（右邊是一個黃色框）。稍後我在中間字段f.e中填寫我的郵政編碼。 '05-123'並點擊右側的'SZUKAJ PO KODZIE'按鈕。最後，我在彈出框中點擊黃色彈出按鈕'USTAW'。

感謝它我越來越想要產品的價格。我想用scrappy複製這種行爲。要在Chrome開發人員工具中這樣做，我選中了網絡標籤和XHR標籤，以確定負責獲取價格的請求。我認爲正確的是'getProductPriceStockByStore/'。

請求

URL:http://www.castorama.pl/bold_all/data/getProductPriceStockByStore/ 
Request Method:POST 
Status Code:200 OK 
Remote Address:109.205.50.98:80

請求頭

Accept:text/javascript, text/html, application/xml, text/xml, */* 
Accept-Encoding:gzip, deflate 
Accept-Language:en-GB,en;q=0.8,pl;q=0.6 
Connection:keep-alive 
Content-Length:39 
Content-type:application/x-www-form-urlencoded; charset=UTF-8 
Cookie:selected_shop_flag=3; CACHED_FRONT_FORM_KEY=2MxQx5N1GeBOoDFl; localizationPopup=1; selected_shop=1; selected_shop_store_view=8002; bold_wishlist=3lg7qtm3teba7s1sbfg77hi352; frontend=3lg7qtm3teba7s1sbfg77hi352; VIEWED_PRODUCT_IDS=30052; cSID_VM=1460629378710; _ga=GA1.2.91284606.1460626559; _ceg.s=o5mcub; _ceg.u=o5mcub; _dc_gtm_UA-27193958-1=1 
Host:www.castorama.pl 
Origin:http://www.castorama.pl 
Referer:http://www.castorama.pl/produkty/narzedzia-i-artykuly/elektronarzedzia-przenosne-i-akcesoria/szlifierki-i-polerki/szlifierki-oscylacyjne/szlifierka-oscylacyjna-pp-110w.html 
User-Agent:Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/49.0.2623.108 Chrome/49.0.2623.108 Safari/537.36

表單數據：

isAjax:true 
product_id:30052 
store:8002

響應：

{"products":{"30052":{"price":"93.98","qty":"7.00","stock_status":1,"html":"in"}},"store":"8002","templates":{"in":"<span><span class=\"in-stock\">Dost\u0119pny<\/span><\/span>","out":"<span><span class=\"out-of-stock\">Niedost\u0119pny<\/span><\/span>","phone":"<span><span class=\"low-stock\">Na zam\u00f3wienie<\/span><\/span>","backorder":"<span><span class=\"backorder-stock\">Na zam\u00f3wienie<\/span><\/span>"},"status":true}

因此，我轉向Scrapy實施該問題的解決方案。我決定創建一個附帶了從上面類似這樣的標題來請求cookie的POST請求：

import scrapy 
from Castorama.items import CastoramaItem 

class DmozSpider(scrapy.Spider): 
    name = "Castorama" 
    allowed_domains = ["castorama.pl"] 
    start_urls = ["http://www.castorama.pl/bold_all/data/getProductPriceStockByStore/"] 

    def start_Request(self): 

     req=scrapy.Request(start_urls[0] 
      , method='POST' 
      , cookies ={'selected_shop_flag':3, 
       'CACHED_FRONT_FORM_KEY':'2MxQx5N1GeBOoDFl', 
       'selected_shop':1, 
       'selected_shop_flag':3, 
       'selected_shop_store_view':8002, 
       'VIEWED_PRODUCT_IDS':30052, 
       'frontend':'3lg7qtm3teba7s1sbfg77hi352', 
       'cSID_VM':1460626558358} 
      ,callback='Rozkoduj' 
      ) 
     yield req 

    def Rozkoduj(self, response): 
     print response.body

但我這個代碼相當不成功。我的控制檯日誌：

2016-04-14 12:54:09 [scrapy] INFO: Scrapy 1.0.5 started (bot: Castorama) 
2016-04-14 12:54:09 [scrapy] INFO: Optional features available: ssl, http11, boto 
2016-04-14 12:54:09 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'Castorama.spiders', 'SPIDER_MODULES': ['Castorama.spiders'], 'BOT_NAME': 'Castorama'} 
2016-04-14 12:54:09 [scrapy] INFO: Enabled extensions: CloseSpider, TelnetConsole, LogStats, CoreStats, SpiderState 
2016-04-14 12:54:09 [boto] DEBUG: Retrieving credentials from metadata server. 
2016-04-14 12:54:10 [boto] ERROR: Caught exception reading instance data 
Traceback (most recent call last): 
    File "/home/michal/anaconda2/lib/python2.7/site-packages/boto/utils.py", line 210, in retry_url 
    r = opener.open(req, timeout=timeout) 
    File "/home/michal/anaconda2/lib/python2.7/urllib2.py", line 431, in open 
    response = self._open(req, data) 
    File "/home/michal/anaconda2/lib/python2.7/urllib2.py", line 449, in _open 
    '_open', req) 
    File "/home/michal/anaconda2/lib/python2.7/urllib2.py", line 409, in _call_chain 
    result = func(*args) 
    File "/home/michal/anaconda2/lib/python2.7/urllib2.py", line 1227, in http_open 
    return self.do_open(httplib.HTTPConnection, req) 
    File "/home/michal/anaconda2/lib/python2.7/urllib2.py", line 1197, in do_open 
    raise URLError(err) 
URLError: <urlopen error timed out> 
2016-04-14 12:54:10 [boto] ERROR: Unable to read instance data, giving up 
2016-04-14 12:54:10 [scrapy] INFO: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats 
2016-04-14 12:54:10 [scrapy] INFO: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware 
2016-04-14 12:54:10 [scrapy] INFO: Enabled item pipelines: 
2016-04-14 12:54:10 [scrapy] INFO: Spider opened 
2016-04-14 12:54:10 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 
2016-04-14 12:54:10 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023 
2016-04-14 12:54:10 [scrapy] DEBUG: Crawled (200) <GET http://www.castorama.pl/bold_all/data/getProductPriceStockByStore/> (referer: None) 
2016-04-14 12:54:10 [scrapy] ERROR: Spider error processing <GET http://www.castorama.pl/bold_all/data/getProductPriceStockByStore/> (referer: None) 
Traceback (most recent call last): 
    File "/home/michal/anaconda2/lib/python2.7/site-packages/twisted/internet/defer.py", line 588, in _runCallbacks 
    current.result = callback(current.result, *args, **kw) 
    File "/home/michal/anaconda2/lib/python2.7/site-packages/scrapy/spiders/__init__.py", line 76, in parse 
    raise NotImplementedError 
NotImplementedError 
2016-04-14 12:54:10 [scrapy] INFO: Closing spider (finished) 
2016-04-14 12:54:10 [scrapy] INFO: Dumping Scrapy stats: 
{'downloader/request_bytes': 256, 
'downloader/request_count': 1, 
'downloader/request_method_count/GET': 1, 
'downloader/response_bytes': 311, 
'downloader/response_count': 1, 
'downloader/response_status_count/200': 1, 
'finish_reason': 'finished', 
'finish_time': datetime.datetime(2016, 4, 14, 10, 54, 10, 776463), 
'log_count/DEBUG': 3, 
'log_count/ERROR': 3, 
'log_count/INFO': 7, 
'response_received_count': 1, 
'scheduler/dequeued': 1, 
'scheduler/dequeued/memory': 1, 
'scheduler/enqueued': 1, 
'scheduler/enqueued/memory': 1, 
'spider_exceptions/NotImplementedError': 1, 
'start_time': datetime.datetime(2016, 4, 14, 10, 54, 10, 477689)} 
2016-04-14 12:54:10 [scrapy] INFO: Spider closed (finished)

這裏是我最後的問題。我的方法是否正確？我應該如何在上面的代碼中嘗試將這個cookie附加到請求中？或者我應該嘗試完全不同的方式。最終，如果我要朝正確的方向發展，應該在代碼中更改哪些內容以創建適當的請求？

非常感謝您的幫助。

Pawel Miech更正後的蜘蛛更新版本。這是更好的，因爲請求工作，但仍然沒有得到適當的迴應。

import scrapy 
from Castorama.items import CastoramaItem 

class DmozSpider(scrapy.Spider): 
    name = "Castorama" 
    allowed_domains = ["castorama.pl"] 
    start_urls=['http://www.castorama.pl'] 

    def parse(self, response): 
     start_urls = ["http://www.castorama.pl/bold_all/data/getProductPriceStockByStore/"] 
     req=scrapy.Request(start_urls[0] 
      , method='POST' 
      , cookies ={'selected_shop_flag':3, 
       'CACHED_FRONT_FORM_KEY':'2MxQx5N1GeBOoDFl', 
       'selected_shop':1, 
       'selected_shop_flag':3, 
       'selected_shop_store_view':8002, 
       'VIEWED_PRODUCT_IDS':30052, 
       'frontend':'3lg7qtm3teba7s1sbfg77hi352', 
       'cSID_VM':1460626558358} 
      ,callback=self.rozkoduj 
      ) 
     yield req 

    def rozkoduj(self, response): 
     print '>>>>>>>>>' 
     print response.body

來源

2016-04-14 michalk

回答

1

Scrapy請求是異步的。每個請求必須有回調。如果沒有回調，則將其設置爲spider.parse方法。如果沒有spider.parse方法你得到NotImplementedError你看到在這個堆棧跟蹤：

Traceback (most recent call last): 
     File "/home/michal/anaconda2/lib/python2.7/site-packages/twisted/internet/defer.py", line 588, in _runCallbacks 
     current.result = callback(current.result, *args, **kw) 
     File "/home/michal/anaconda2/lib/python2.7/site-packages/scrapy/spiders/__init__.py", line 76, in parse 
     raise NotImplementedError 
    NotImplementedError

所以用添加適量回調到您的文章開始（必須是參考蜘蛛方法，而不是字符串，如self.rozkoduj和不是「Rozkoduj」）。

Urlopen錯誤是從boto發送的，如果您沒有配置s3，它會發出醜陋的消息，但可能會被忽略，直到有人在Scrapy核心中修復了此故障單。

這是我最後的問題。我的方法是否正確？我應該如何在上面的代碼中嘗試將這個cookie附加到請求中？

答案與往常一樣：取決於。如果你只關心發送一個請求的cookie，你的方法是正確的。 但是如果你想要有這些cookies在所有請求從蜘蛛發送，包括從你的POST回調發出的請求，那麼你必須添加cookie到cookiejar。在cookiejar設置cookie是unfortunantely不是很容易，有票進行這種簡單的在這裏：https://github.com/scrapy/scrapy/issues/1878

在簡而言之設置cookie來cookiejar是沿着線做一些事情（這是所有僞，只有指針）的事情：

# must be cookielib.Cookie object 
# must pass all kwargs for cookielib.Cookie 
cookie = Cookie(**kwargs) 
# get cookiejar object it is stored in cookie middleware 
all_mw = spider.crawler.engine.downloader.middleware.middlewares 
# find cookie middleware there 
cookiejar = cookie_middleware._cookiejars[None] 
cookiejar.set_cookie(cookie)

來源

2016-04-14 12:23:32

+0

謝謝您的輸入。我只想第一次使用它，暫時我不需要在這種情況下使用cookiejar。但我認爲cookie/request被錯誤地定義或者是其他的，因爲我得到了一個空的響應。我把最新的代碼放在我的問題的底部。 – michalk

+0

你沒有發送任何POST數據。如果你的開發工具分析是正確的，你也應該發送這三個表單密鑰。你想盡可能地模仿瀏覽器（一些標題會被設置，有些不重要，但一些瀏覽器標題可能很重要）。 Scrapy具有表單請求的FormRequest類，它將爲您設置contentt類型。 –

相關問題

 相關問題