Django与DRF结合的全局异常处理方案详解

def exception_handler(exc, context):
    """
    Returns the response that should be used for any given exception.
    By default we handle the REST framework `APIException`, and also
    Django's built-in `Http404` and `PermissionDenied` exceptions.
    Any unhandled exceptions may return `None`, which will cause a 500 error
    to be raised.
    """
    if isinstance(exc, Http404):
        exc = exceptions.NotFound()
    elif isinstance(exc, PermissionDenied):
        exc = exceptions.PermissionDenied()
    if isinstance(exc, exceptions.APIException):
        headers = {}
        if getattr(exc, 'auth_header', None):
            headers['WWW-Authenticate'] = exc.auth_header
        if getattr(exc, 'wait', None):
            headers['Retry-After'] = '%d' % exc.wait
        if isinstance(exc.detail, (list, dict)):
            data = exc.detail
        else:
            data = {'detail': exc.detail}
        set_rollback()
        return Response(data, status=exc.status_code, headers=headers)
    return None

REST_FRAMEWORK = {
    'EXCEPTION_HANDLER': 'server.exception.exception_globe.globe_exception_handler'
}

def globe_exception_handler(exc, context):
    """
        Below is the global exception handler of drf
        Http404 / PermissionDenied / APIException
    """
    # Call REST framework's default exception handler
    response = exception_handler(exc, context)
    request = context['request']
    # Exceptions form DRF and Django built-in `Http404` and `PermissionDenied`
    if response is not None:
        if isinstance(response.data, list):
            msg = '; '.join(response.data)
        elif isinstance(response.data, str):
            msg = response.data
        else:
            msg = 'Sorry, we make a mistake (*￣︶￣)!'
        ex_data = {
            "msg": msg,
            "error_code": 1000,
            "request": request.path
        }
        return JsonResponse(data=ex_data, status=response.status_code)
    # Exceptions from others
    # 如果 response 为 None 则直接触发上面的 ExceptionGlobeMiddleware
    return response

try:
    from django.utils.deprecation import MiddlewareMixin  # Django 1.10.x
except ImportError:
    MiddlewareMixin = object  # Django 1.4.x - Django 1.9.x

class ExceptionGlobeMiddleware(MiddlewareMixin):
    """
        Below is the global exception handler of django
    """
    def process_exception(self, request, exception):
        # 直接抛出 django admin 的异常
        if str(request.path).startswith('/admin/'):
            return None
        # 捕获其他异常，直接返回 500
        ex_data = {
            "msg": "Sorry, we make a mistake (*￣︶￣)!",
            "error_code": 1000,
            "request": request.path
        }
        return JsonResponse(data=ex_data, status=500)

# 直接抛出 django admin 的异常
if str(request.path).startswith('/admin/'):
    return None