我使用python 2.7.2,瓶子0.10.9和“瑞士军刀”scrapy 0.14.1编写简单的REST API。
简单地说,只有一种方法(myserver:8081 / doparse?address =“url”)启动使用scrapy抓取url并在json中返回响应。
使用bottle内置服务器部署脚本时,我得到以下输出:
Shutdown...
Traceback (most recent call last):
File "parser/main.py", line 67, in <module>
run(host='ks205512.kimsufi.com', port=8081)
File "/usr/local/lib/python2.6/dist-packages/bottle.py", line 2391, in run
server.run(app)
File "/usr/local/lib/python2.6/dist-packages/bottle.py", line 2089, in run
srv.serve_forever()
File "/usr/lib/python2.6/SocketServer.py", line 224, in serve_forever
r, w, e = select.select([self], [], [], poll_interval)
select.error: (4, 'Interrupted system call')
将瓶子与cherrypy等其他服务器一起使用会产生其他错误,例如:
Traceback (most recent call last):
File "/usr/local/lib/python2.6/dist-packages/bottle.py", line 737, in _handle
return route.call(**args)
File "/usr/local/lib/python2.6/dist-packages/bottle.py", line 1456, in wrapper
rv = callback(*a, **ka)
File "parser/main.py", line 20, in parse
return parse_url(url)
File "parser/main.py", line 35, in parse_url
items = crawler.start(url) # launching crawler
File "/home/projects/linkedinparser/parser/crawler.py", line 140, in start
crawler = CrawlerWorker(LinkedinSpider(url), results)
File "/home/projects/linkedinparser/parser/crawler.py", line 85, in __init__
self.crawler = CrawlerProcess(settings)
File "/usr/local/lib/python2.6/dist-packages/scrapy/crawler.py", line 69, in __init__
install_shutdown_handlers(self._signal_shutdown)
File "/usr/local/lib/python2.6/dist-packages/scrapy/utils/ossignal.py", line 21, in install_shutdown_handlers
reactor._handleSignals()
File "/usr/local/lib/python2.6/dist-packages/twisted/internet/posixbase.py", line 292, in _handleSignals
_SignalReactorMixin._handleSignals(self)
File "/usr/local/lib/python2.6/dist-packages/twisted/internet/base.py", line 1129, in _handleSignals
signal.signal(signal.SIGINT, self.sigInt)
ValueError: signal only works in main thread
我会感激任何帮助。 感谢
答案 0 :(得分:2)
默认情况下,默认反应器将安装信号处理程序以捕获Ctrl-C,SIGTERM等事件。但是,您无法在Python中从非主线程安装信号处理程序,这意味着reactor.run()将导致错误。将installSignalHandlers=0
关键字参数传递给reactor.run
以解决此问题。