You may create and use an http.Request forged by you, which deliberately returns an error when reading its body. You don’t necessarily need a whole new request, a faulty body is enough (which is an io.ReadCloser). Simplest achieved by using the httptest.NewRequest() function where you can pass an io.Reader value which will be used (wrapped … Read more
Yes, there is a better way. You may change the status details using the ServicerContext.set_details method and you may change the status code using the ServicerContext.set_code method. I suspect that your servicer will look something like class MyService(proto_pb2.SomethingServicer): def Do(self, request, context): if not is_valid_field(request.field): context.set_code(grpc.StatusCode.INVALID_ARGUMENT) context.set_details(‘Consarnit!’) return proto_pb2.Response() return proto_pb2.Response(response=”Yeah!”) .
The consensus of the Perl community seems to be that Try::Tiny is the preferred way of doing exception handling. The “lenient policy” you refer to is probably due to a combination of: Perl not being a fully object-oriented language. (e.g. in contrast to Java where you can’t avoid dealing with exceptions.) The background of many … Read more
You can only catch SyntaxError if it’s thrown out of an eval, exec, or import operation. >>> try: … eval(‘x === x’) … except SyntaxError: … print “You cannot do that” … You cannot do that This is because, normally, the interpreter parses the entire file before executing any of it, so it detects the … Read more
If you have resources that need to be released at the end, then sometimes the old trusty goto can be handy! int major_func(size_t len) { int err; char *buf; buf = malloc(len); if (err = minor_func1(buf)) goto major_func_end; if (err = minor_func2(buf)) goto major_func_end; if (err = minor_func3(buf)) goto major_func_end; major_func_end: free(buf); return err; }
This is how we handle it in my team: First we build our main page (The navigation root) like this: @override Widget build(BuildContext context) { return BlocBuilder<SuspectEvent, SuspectState>( bloc: _bloc, builder: (context, state) { if (state.cameras.isEmpty) _bloc.dispatch(GetCamerasEvent()); if (!_isExceptionHandled) { _shouldHandleException( hasException: state.hasException, handleException: state.handleException); } return Scaffold( … We declare the _shouldHandleException like this … Read more
Just visit: http://www.boost.org/doc/libs/1_55_0/libs/system/doc/reference.html#Header-error_code enum errc_t { success = 0, address_family_not_supported, //EAFNOSUPPORT address_in_use, //EADDRINUSE address_not_available, //EADDRNOTAVAIL already_connected, //EISCONN argument_list_too_long, //E2BIG argument_out_of_domain, //EDOM bad_address, //EFAULT bad_file_descriptor, //EBADF bad_message, //EBADMSG broken_pipe, //EPIPE connection_aborted, //ECONNABORTED connection_already_in_progress, //EALREADY connection_refused, //ECONNREFUSED connection_reset, //ECONNRESET cross_device_link, //EXDEV destination_address_required, //EDESTADDRREQ device_or_resource_busy, //EBUSY directory_not_empty, //ENOTEMPTY executable_format_error, //ENOEXEC file_exists, //EEXIST file_too_large, //EFBIG filename_too_long, //ENAMETOOLONG function_not_supported, //ENOSYS … Read more
Herb Sutter’s and Andrei Alexandrescu’s book C++ Coding Standards comes with a whole chapter on Error Handling and Exceptions including Assert liberally to document internal assumptions and invariants Establish a rational error handling policy, and follow it strictly Distinguish between errors and non-errors Design and write error-safe code Prefer to use exceptions to report errors … Read more
“onerror” is not a valid event type for <video> Use “error” instead. document.getElementsByTagName(‘video’)[0].addEventListener(‘error’, function(event) { … }, true); For a complete list of events for <video> go here: https://developer.mozilla.org/En/Using_audio_and_video_in_Firefox