scrapy蜘蛛日志不写入日志文件

Question

我有一个蜘蛛类从BaseSpider派生。我打电话self.log，但没有写入日志文件。我在命令行LOG_FILE和LOG_LEVEL上配置日志文件，但spider日志输出未写入该文件。如何将蜘蛛日志写入正常的日志文件？

Answer 1

你确定你的回调获取调用？

由于在文件中example.py有这个简单的蜘蛛：

from scrapy.spider import BaseSpider 

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

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

而且随着scrapy runspider example.py --set LOG_FILE=logfile运行它，这是文件内容：

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) 

尝试添加失败而回调，以确保被召唤。简单的像raise Exception。如果在运行时没有发生异常，那么您的回调没有被调用。