casablanca http_listener "Error adding url to url group"

Question

I am currently trying to implement a REST interface with casablanca but I keep getting "Error adding url to url group". And I don't really know how to fix that. Here is my main method:

    int main(int argc, char* argv[])
{
    InterruptHandler::hookSIGINT();

    Server server;
    server.setEndpoint(L"http", 41004, L"/api/v1");

    try {
        // wait for server initialization...
        server.accept().wait();
        std::wcout << L"Modern C++ Server now listening for requests at: " << server.endpoint() << '\n';

        InterruptHandler::waitForUserInterrupt();

        server.shutdown().wait();
    }
    catch (std::exception & e) {
        std::cerr << e.what() << '\n'; //this is returning "Error adding url to url group"
    }

    system("pause");
}

I am now trying to figure out where the problem could be but I didn't get far. I am setting the Endpoint and creating the http_listener like this (Server class extends BaseController):

void BaseController::setEndpoint(const std::wstring &scheme, const int port, const std::wstring &path) {
        uri_builder endpointBuilder;

        endpointBuilder.set_scheme(scheme);
        endpointBuilder.set_host(L"0.0.0.0");
        endpointBuilder.set_port(port); //41004
        endpointBuilder.set_path(path);

        _listener = http_listener(endpointBuilder.to_uri());
    }

When the Server accepts, the supporting methods are being set on the listener

void Server::initRestOpHandlers() {
    _listener.support(methods::GET, std::bind(&Server::handleGet, this, std::placeholders::_1));
    _listener.support(methods::POST, std::bind(&Server::handlePost, this, std::placeholders::_1));
}

The exception is thrown in the http_listener.cpp open() method:

pplx::task<void> details::http_listener_impl::open()
{
    // Do nothing if the open operation was already attempted
    // Not thread safe
    if (!m_closed) return pplx::task_from_result();

    if ( m_uri.is_empty() )
        throw std::invalid_argument("No URI defined for listener.");
    m_closed = false;

    return web::http::experimental::details::http_server_api::register_listener(this).then([this](pplx::task<void> openOp)
    {
        try
        {
            // If failed to open need to mark as closed.
            openOp.wait();
        }
        catch(...)
        {
            m_closed = true;
            throw;
        }
        return openOp;
    });
}

I can't find any help elsewhere and I can't seem to figure out why it fails to open. Any help would be appreciated! Thanks.

Answer 1

ok I was able to solve it myself... I had to use 127.0.0.1 for the host in my BaseController