public static async Task Run()
{
AuthenticationHeaderValue authHeaderValue = AuthenticationHeaderValue.Parse("Basic R2VrY3RlazpXZWxjMG1lIQ==");
RpcClient client = new RpcClient(new Uri("http://localhost:62390/RpcApi/"), authHeaderValue);
RpcRequest request = new RpcRequest("Id1", "CharacterCount", "Test");
RpcResponse response = await client.SendRequestAsync(request, "Strings");
List<RpcRequest> requests = new List<RpcRequest>
{
request,
new RpcRequest("id2", "CharacterCount", "Test2"),
new RpcRequest("id3", "CharacterCount", "Test23")
};
List<RpcResponse> bulkResponse = await client.SendBulkRequestAsync(requests, "Strings");
IntegerFromSpace responseValue = response.GetResult<IntegerFromSpace>();
if (responseValue == null)
{
Console.WriteLine("null");
}
else
{
Console.WriteLine(responseValue.Test);
}
}
public override async Task<RpcResponse> InterceptSendRequestAsync(Func<RpcRequest, string, Task<RpcResponse>> interceptedSendRequestAsync, RpcRequest request, string route = null)
{
if (request.Method == "eth_accounts")
{
return BuildResponse(new string[] { "hello", "hello2"}, route);
}
if (request.Method == "eth_getCode")
{
return BuildResponse("the code", route);
}
return await interceptedSendRequestAsync(request, route);
}
public static RpcRequest WithNoParameters(string method, RpcId id = default)
{
return(RpcRequest.WithParameters(method, default, id));
public static RpcRequest WithNoParameters(string id, string method)
{
return(RpcRequest.ConvertInternal(new RpcId(id), method, null, null));
}
public abstract Task<RpcResponse> InterceptSendRequestAsync(
Func<RpcRequest, string, Task<RpcResponse>> interceptedSendRequestAsync, RpcRequest request,
string route = null);
/// <summary>
/// Call the incoming Rpc request method and gives the appropriate response
/// </summary>
/// <param name="request">Rpc request</param>
/// <param name="route">Rpc route that applies to the current request</param>
/// <param name="httpContext">The context of the current http request</param>
/// <param name="jsonSerializerSettings">Json serialization settings that will be used in serialization and deserialization for rpc requests</param>
/// <returns>An Rpc response for the request</returns>
public async Task<RpcResponse> InvokeRequestAsync(RpcRequest request, RpcRoute route, HttpContext httpContext, JsonSerializerSettings jsonSerializerSettings = null)
{
try
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
if (route == null)
{
throw new ArgumentNullException(nameof(route));
}
}
catch (ArgumentNullException ex) // Dont want to throw any exceptions when doing async requests
{
return this.GetUnknownExceptionReponse(request, ex);
}
this.logger?.LogDebug($"Invoking request with id '{request.Id}'");
RpcResponse rpcResponse;
try
{
if (!string.Equals(request.JsonRpcVersion, JsonRpcContants.JsonRpcVersion))
{
throw new RpcInvalidRequestException($"Request must be jsonrpc version '{JsonRpcContants.JsonRpcVersion}'");
}
object[] parameterList;
RpcMethod rpcMethod = this.GetMatchingMethod(route, request, out parameterList, httpContext.RequestServices, jsonSerializerSettings);
bool isAuthorized = await this.IsAuthorizedAsync(rpcMethod, httpContext);
if (isAuthorized)
{
this.logger?.LogDebug($"Attempting to invoke method '{request.Method}'");
object result = await rpcMethod.InvokeAsync(parameterList);
this.logger?.LogDebug($"Finished invoking method '{request.Method}'");
JsonSerializer jsonSerializer = JsonSerializer.Create(jsonSerializerSettings);
if (result is IRpcMethodResult)
{
this.logger?.LogTrace($"Result is {nameof(IRpcMethodResult)}.");
rpcResponse = ((IRpcMethodResult)result).ToRpcResponse(request.Id, obj => JToken.FromObject(obj, jsonSerializer));
}
else
{
this.logger?.LogTrace($"Result is plain object.");
JToken resultJToken = result != null ? JToken.FromObject(result, jsonSerializer) : null;
rpcResponse = new RpcResponse(request.Id, resultJToken);
}
}
else
{
var authError = new RpcError(RpcErrorCode.InvalidRequest, "Unauthorized");
rpcResponse = new RpcResponse(request.Id, authError);
}
}
catch (RpcException ex)
{
this.logger?.LogException(ex, "An Rpc error occurred. Returning an Rpc error response");
RpcError error = new RpcError(ex, this.serverConfig.Value.ShowServerExceptions);
rpcResponse = new RpcResponse(request.Id, error);
}
catch (Exception ex)
{
rpcResponse = this.GetUnknownExceptionReponse(request, ex);
}
if (request.Id != null)
{
this.logger?.LogDebug($"Finished request with id '{request.Id}'");
//Only give a response if there is an id
return rpcResponse;
}
this.logger?.LogDebug($"Finished request with no id. Not returning a response");
return null;
}
/// <summary>
/// Finds the matching Rpc method for the current request
/// </summary>
/// <param name="route">Rpc route for the current request</param>
/// <param name="request">Current Rpc request</param>
/// <param name="parameterList">Paramter list parsed from the request</param>
/// <param name="serviceProvider">(Optional)IoC Container for rpc method controllers</param>
/// <param name="jsonSerializerSettings">Json serialization settings that will be used in serialization and deserialization for rpc requests</param>
/// <returns>The matching Rpc method to the current request</returns>
private RpcMethod GetMatchingMethod(RpcRoute route, RpcRequest request, out object[] parameterList, IServiceProvider serviceProvider = null, JsonSerializerSettings jsonSerializerSettings = null)
{
if (route == null)
{
throw new ArgumentNullException(nameof(route));
}
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
this.logger?.LogDebug($"Attempting to match Rpc request to a method '{request.Method}'");
List<RpcMethod> methods = DefaultRpcInvoker.GetRpcMethods(route, serviceProvider, jsonSerializerSettings);
//Case insenstive check for hybrid approach. Will check for case sensitive if there is ambiguity
methods = methods
.Where(m => string.Equals(m.Method, request.Method, StringComparison.OrdinalIgnoreCase))
.ToList();
RpcMethod rpcMethod = null;
parameterList = null;
int originalMethodCount = methods.Count;
if (methods.Count > 0)
{
List<RpcMethod> potentialMatches = new List<RpcMethod>();
foreach (RpcMethod method in methods)
{
bool matchingMethod;
if (request.ParameterMap != null)
{
matchingMethod = method.HasParameterSignature(request.ParameterMap, out parameterList);
}
else
{
matchingMethod = method.HasParameterSignature(request.ParameterList);
parameterList = request.ParameterList;
}
if (matchingMethod)
{
potentialMatches.Add(method);
}
}
if (potentialMatches.Count > 1)
{
//Try to remove ambiguity with case sensitive check
potentialMatches = potentialMatches
.Where(m => string.Equals(m.Method, request.Method, StringComparison.Ordinal))
.ToList();
if (potentialMatches.Count != 1)
{
this.logger?.LogError("More than one method matched the rpc request. Unable to invoke due to ambiguity.");
throw new RpcMethodNotFoundException();
}
}
if (potentialMatches.Count == 1)
{
rpcMethod = potentialMatches.First();
}
}
if (rpcMethod == null)
{
this.logger?.LogError("No methods matched request.");
throw new RpcMethodNotFoundException();
}
this.logger?.LogDebug("Request was matched to a method");
return rpcMethod;
}
/// <summary>
/// Converts an unknown caught exception into a Rpc response
/// </summary>
/// <param name="request">Current Rpc request</param>
/// <param name="ex">Unknown exception</param>
/// <returns>Rpc error response from the exception</returns>
private RpcResponse GetUnknownExceptionReponse(RpcRequest request, Exception ex)
{
this.logger?.LogException(ex, "An unknown error occurred. Returning an Rpc error response");
RpcUnknownException exception = new RpcUnknownException("An internal server error has occurred", ex);
RpcError error = new RpcError(exception, this.serverConfig.Value.ShowServerExceptions);
if (request?.Id == null)
{
return null;
}
RpcResponse rpcResponse = new RpcResponse(request.Id, error);
return rpcResponse;
}