[05] Flask tutorial exception caught

HTTP exception thrown initiative

• abort method
  • Throws a given state codes HTTPException or specify the response, for example, want to use a page not found exception to the termination request, you can call abort (404).
• parameter:
  • code - HTTP error status code

# abort(404)
abort(500)

Thrown status code, you can only throw an error status code of the HTTP protocol

Capture error

• errorhandler decorator
  • Register an error handler, when the program throws a specified error status code when the method is called decorator decorated
• parameter:
  • code_or_exception - HTTP error status code or specified exception
• For example unitary status code of 500 error to the user-friendly tips:

app.errorhandler @ (500 )
 DEF INTERNAL_SERVER_ERROR (E):
     return  ' server move a '

• Capture the specified exception

app.errorhandler @ (the ZeroDivisionError)
 DEF zero_division_error (E):
     return  ' divisor is not 0 '