快速批量刮臉Facebook粉絲頁面的數字ID

Question

許多Facebook粉絲頁面現在採用以下格式 - https://www.facebook.com/TiltedKiltEsplanade其中「TiltedKiltEsplanade」是頁面所有者聲明的名稱示例。但是，同一頁面的RSS源可在https://www.facebook.com/feeds/page.php?id=414117051979234&format=rss20處找到，其中414117051979234是一個ID，可以通過轉到https：// 圖 .facebook.com/TiltedKiltEsplanade並查找頁面上列出的最後一個數字ID來確定頁面頂部有兩個類似的ID，但這些可以忽略）。

我有一個很長的上述格式的Facebook粉絲頁面列表，我想快速獲取與這些頁面對應的數字ID，以便我可以將它們全部添加到RSS閱讀器。什麼是最簡單的方法來刮這些網頁？我熟悉Scrapy，但我不確定它是否可以使用，因爲頁面的圖形版本沒有標記爲允許輕鬆抓取（據我所知）

謝謝。

Answer 1

圖請求的輸出是一個JSON對象。這比HTML內容更容易處理。

這將是一個簡單的實現你正在尋找：

# file: myspider.py 
import json 

from scrapy.http import Request 
from scrapy.spider import BaseSpider 


class MySpider(BaseSpider): 
    name = 'myspider' 
    start_urls = (
     # Add here more urls. Alternatively, make the start urls dynamic 
     # reading them from a file, db or an external url. 
     'https://www.facebook.com/TiltedKiltEsplanade', 
    ) 

    graph_url = 'https://graph.facebook.com/{name}' 
    feed_url = 'https://www.facebook.com/feeds/page.php?id={id}&format=rss20' 

    def start_requests(self): 
     for url in self.start_urls: 
      # This assumes there is no trailing slash 
      name = url.rpartition('/')[2] 
      yield Request(self.graph_url.format(name=name), self.parse_graph) 

    def parse_graph(self, response): 
     data = json.loads(response.body) 
     return Request(self.feed_url.format(id=data['id']), self.parse_feed) 

    def parse_feed(self, response): 
     # You can use the xml spider, xml selector or the feedparser module 
     # to extract information from the feed. 
     self.log('Got feed: %s' % response.body[:100]) 

輸出：

$ scrapy runspider myspider.py 
2014-01-11 02:19:48-0400 [scrapy] INFO: Scrapy 0.21.0-97-g21a8a94 started (bot: scrapybot) 
2014-01-11 02:19:48-0400 [scrapy] DEBUG: Optional features available: ssl, http11, boto, django 
2014-01-11 02:19:48-0400 [scrapy] DEBUG: Overridden settings: {} 
2014-01-11 02:19:49-0400 [scrapy] DEBUG: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState 
2014-01-11 02:19:49-0400 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, HttpCompressionMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats 
2014-01-11 02:19:49-0400 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware 
2014-01-11 02:19:49-0400 [scrapy] DEBUG: Enabled item pipelines: 
2014-01-11 02:19:49-0400 [myspider] INFO: Spider opened 
2014-01-11 02:19:49-0400 [myspider] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 
2014-01-11 02:19:49-0400 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6023 
2014-01-11 02:19:49-0400 [scrapy] DEBUG: Web service listening on 0.0.0.0:6080 
2014-01-11 02:19:49-0400 [myspider] DEBUG: Crawled (200) <GET https://graph.facebook.com/TiltedKiltEsplanade> (referer: None) 
2014-01-11 02:19:50-0400 [myspider] DEBUG: Crawled (200) <GET https://www.facebook.com/feeds/page.php?id=414117051979234&format=rss20> (referer: https://graph.facebook.com/TiltedKiltEsplanade) 
2014-01-11 02:19:50-0400 [myspider] DEBUG: Got feed: <?xml version="1.0" encoding="utf-8"?> 
    <rss version="2.0" 
      xmlns:media="http://search.yahoo.com 
2014-01-11 02:19:50-0400 [myspider] INFO: Closing spider (finished) 
2014-01-11 02:19:50-0400 [myspider] INFO: Dumping Scrapy stats: 
    {'downloader/request_bytes': 578, 
    'downloader/request_count': 2, 
    'downloader/request_method_count/GET': 2, 
    'downloader/response_bytes': 6669, 
    'downloader/response_count': 2, 
    'downloader/response_status_count/200': 2, 
    'finish_reason': 'finished', 
    'finish_time': datetime.datetime(2014, 1, 11, 6, 19, 50, 849162), 
    'log_count/DEBUG': 9, 
    'log_count/INFO': 3, 
    'request_depth_max': 1, 
    'response_received_count': 2, 
    'scheduler/dequeued': 2, 
    'scheduler/dequeued/memory': 2, 
    'scheduler/enqueued': 2, 
    'scheduler/enqueued/memory': 2, 
    'start_time': datetime.datetime(2014, 1, 11, 6, 19, 49, 221361)} 
2014-01-11 02:19:50-0400 [myspider] INFO: Spider closed (finished)