错误信息：
[E 160329 11:32:22 base_handler:194] HTTP 599: SSL certificate problem: self signed certificate in certificate chain
Traceback (most recent call last):
File "D:\Python27\lib\site-packages\pyspider\libs\base_handler.py", line 187, in run_task
result = self._run_task(task, response)
File "D:\Python27\lib\site-packages\pyspider\libs\base_handler.py", line 166, in _run_task
response.raise_for_status()
File "D:\Python27\lib\site-packages\pyspider\libs\response.py", line 183, in raise_for_status
raise http_error
HTTPError: HTTP 599: SSL certificate problem: self signed certificate in certificate chain
解决方法：
使用：
self.crawl(url, callback=self.index_page, validate_cert=False)