如何拦截flask中的所有异常? [英] How to intercept all exceptions in flask?

问题描述

也许我在文档中没有看到任何内容.

Perhaps I am not seeing something in the documentation.

我不仅要处理一些 http 错误，还要处理所有异常.原因 - 我想使用我自己的自定义逻辑来记录它们(听起来像是重新发明轮子，但我需要完全控制日志记录.我不想让服务器屈服于异常，而是只轰炸那个特定的请求.

I would like to not just handle some http errors, but all exceptions. The reason - I would like to log them using my own custom logic (sounds like reinventing the wheel, but I need full control over logging. I would like to not bring the server to its knees upon an exception, but bomb only that particular request.

这就是我现在启动 Flask 的方式.这里 app.run 启动服务器.我如何指示它在发生异常时调用我的异常处理程序方法?

This is how I launch Flask now. Here app.run starts the server. How can I instruct it to call my exception handler method whenever an exception occurs?

def main():
    args = parse_args()
    app.config['PROPAGATE_EXCEPTIONS'] = True
    flask_options = {'port' : args.port}
    if args.host == 'public':
        flask_options['host'] = '0.0.0.0'
    app.run(**flask_options)

if __name__ == '__main__':
    _sys.exit(main())

推荐答案

你应该使用 errorhandler，参见文档 http://flask.pocoo.org/docs/patterns/errorpages/#error-handlers 和 http://flask.pocoo.org/docs/api/#flask.Flask.errorhandler.它允许您获得调度程序中引发的所有异常，但不能处理错误处理程序中的异常.例如处理所有异常:

You should use errorhandler, see documentation http://flask.pocoo.org/docs/patterns/errorpages/#error-handlers and http://flask.pocoo.org/docs/api/#flask.Flask.errorhandler. It is allow you get all exceptions raised in dispatchers, but not handle exceptions in error handlers. For example to handle all exceptions:

@app.errorhandler(Exception)
def all_exception_handler(error):
   return 'Error', 500

在这种情况下，我更喜欢显式异常处理程序还是使用装饰器(基于类的视图).

How ever I prefer explicit exceptions handlers or use decorators (class based views) for this cases.

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