scrapy蜘蛛日誌不寫入日誌文件

Question

我有一個蜘蛛類從BaseSpider派生。我打電話self.log，但沒有寫入日誌文件。我在命令行LOG_FILE和LOG_LEVEL上配置日誌文件，但spider日誌輸出未寫入該文件。如何將蜘蛛日誌寫入正常的日誌文件？

Answer 1

你確定你的回調獲取調用？

由於在文件中example.py有這個簡單的蜘蛛：

from scrapy.spider import BaseSpider 

class ExampleSpider(BaseSpider): 
    name = "example" 
    start_urls = ['http://www.example.com/'] 

    def parse(self, response): 
     self.log('************* my log ***********') 

而且隨着scrapy runspider example.py --set LOG_FILE=logfile運行它，這是文件內容：

2013-09-30 22:55:12-0400 [scrapy] INFO: Scrapy 0.16.5 started (bot: mybot) 
2013-09-30 22:55:12-0400 [scrapy] DEBUG: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState 
2013-09-30 21:55:12-0500 [scrapy] DEBUG: Enabled downloader middlewares: HttpAuthMiddleware, DownloadTimeoutMiddleware, UserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, RedirectMiddleware, CookiesMiddleware, HttpCompressionMiddleware, ChunkedTransferMiddleware, DownloaderStats 
2013-09-30 21:55:12-0500 [scrapy] DEBUG: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware 
2013-09-30 21:55:12-0500 [scrapy] DEBUG: Enabled item pipelines: MybotPipeline 
2013-09-30 21:55:12-0500 [example] INFO: Spider opened 
2013-09-30 21:55:12-0500 [example] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 
2013-09-30 21:55:12-0500 [scrapy] DEBUG: Telnet console listening on 0.0.0.0:6023 
2013-09-30 21:55:12-0500 [scrapy] DEBUG: Web service listening on 0.0.0.0:6080 
2013-09-30 21:55:13-0500 [example] DEBUG: Crawled (200) <GET http://www.example.com/> (referer: None) 
2013-09-30 21:55:13-0500 [example] DEBUG: ************* my log *********** 
2013-09-30 21:55:13-0500 [example] INFO: Closing spider (finished) 
2013-09-30 21:55:13-0500 [example] INFO: Dumping Scrapy stats: 
    {'downloader/request_bytes': 221, 
    'downloader/request_count': 1, 
    'downloader/request_method_count/GET': 1, 
    'downloader/response_bytes': 1611, 
    'downloader/response_count': 1, 
    'downloader/response_status_count/200': 1, 
    'finish_reason': 'finished', 
    'finish_time': datetime.datetime(2013, 10, 1, 2, 55, 13, 315807), 
    'log_count/DEBUG': 8, 
    'log_count/INFO': 4, 
    'response_received_count': 1, 
    'scheduler/dequeued': 1, 
    'scheduler/dequeued/memory': 1, 
    'scheduler/enqueued': 1, 
    'scheduler/enqueued/memory': 1, 
    'start_time': datetime.datetime(2013, 10, 1, 2, 55, 12, 991150)} 
2013-09-30 21:55:13-0500 [example] INFO: Spider closed (finished) 

嘗試添加失敗而回調，以確保被召喚。簡單的像raise Exception。如果在運行時沒有發生異常，那麼您的回調沒有被調用。