python - Bottle 关闭

Question

我有使用 python 2.7.2、bottle 0.10.9 和“瑞士军刀” scrapy 0.14.1 编写的简单 REST API。

简单来说，只有一种方法 (myserver:8081/doparse?address="url") 启动使用 scrapy 抓取 url 并以 json 形式返回响应。

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 Bottle 与其他服务器(例如cherrypy)一起使用并没有帮助，但会产生其他错误，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

我将不胜感激任何形式的帮助。谢谢

Answer 1

默认情况下，默认 react 器将安装信号处理程序来捕获 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。