I would like to know if there is a way to configure SignalR so that the client functions in the hub return objects using camel case.
Thanks.
SignalR can be used to add any sort of "real-time" web functionality to your ASP.NET application. While chat is often used as an example, you can do a whole lot more. Any time a user refreshes a web page to see new data, or the page implements long polling to retrieve new data, it is a candidate for using SignalR.
ASP.NET Core SignalR supports two protocols for encoding messages: JSON and MessagePack. Each protocol has serialization configuration options.
SignalR allows messages to be sent to a particular client connection, all connections associated with a specific user, as well as to named groups of connections. => await Clients. User(userId).
Roll your own Conttract resolver like
public class SignalRContractResolver : IContractResolver { private readonly Assembly assembly; private readonly IContractResolver camelCaseContractResolver; private readonly IContractResolver defaultContractSerializer; public SignalRContractResolver() { defaultContractSerializer = new DefaultContractResolver(); camelCaseContractResolver = new CamelCasePropertyNamesContractResolver(); assembly = typeof(Connection).Assembly; } public JsonContract ResolveContract(Type type) { if (type.Assembly.Equals(assembly)) { return defaultContractSerializer.ResolveContract(type); } return camelCaseContractResolver.ResolveContract(type); } }
Register it like
var settings = new JsonSerializerSettings(); settings.ContractResolver = new SignalRContractResolver(); var serializer = JsonSerializer.Create(settings); GlobalHost.DependencyResolver.Register(typeof (JsonSerializer), () => serializer);
If you use a custom IoC you can run into problems because JsonSerializer
is a concrete type and some IoCs like for example Ninject will inject unbound concrete types. In Ninjects case the solution is to register it with Ninject instead of with SignalRs own DependencyResolver
var settings = new JsonSerializerSettings(); settings.ContractResolver = new SignalRContractResolver(); var serializer = JsonSerializer.Create(settings); kernel.Bind<JsonSerializer>().ToConstant(serializer);
More info on my blog: http://andersmalmgren.com/2014/02/27/why-overriding-jsonserializer-no-longer-work-in-signalr-2-0/
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