Hi Kitty,

You can do it like this.

Inside the controller,

from odoo.addons.base.ir import ir_http

class IrHttp(ir_http.IrHttp):

    @classmethod
    def _handle_exception(cls, exception):
        # If handle_exception returns something different than None, it will be used as a response

        # This is done first as the attachment path may
        # not match any HTTP controller
        if isinstance(exception, werkzeug.exceptions.HTTPException) and exception.code == 404:
            attach = cls._serve_attachment()
            if attach:
                return attach

        # Don't handle exception but use werkeug debugger if server in --dev mode
        if 'werkzeug' in tools.config['dev_mode']:
            raise
        try:
            return request._handle_exception(exception)
        except AccessDenied:
            return werkzeug.exceptions.Forbidden()

Thanks