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JsonRpcProcessor.cs
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138 lines (125 loc) · 5.45 KB
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using System;
using System.Globalization;
using System.Threading;
using System.Threading.Tasks;
using System.Reflection;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Newtonsoft.Json;
namespace AustinHarris.JsonRpc
{
public static class JsonRpcProcessor
{
public static void Process(JsonRpcStateAsync async, object context = null)
{
Process(Handler.DefaultSessionId(), async, context);
}
public static void Process(string sessionId, JsonRpcStateAsync async, object context = null)
{
Process(sessionId, async.JsonRpc, context)
.ContinueWith(t =>
{
async.Result = t.Result;
async.SetCompleted();
});
}
public static Task<string> Process(string jsonRpc, object context = null)
{
return Process(Handler.DefaultSessionId(), jsonRpc, context);
}
public static Task<string> Process(string sessionId, string jsonRpc, object context = null)
{
return Task<string>.Factory.StartNew((_) =>
{
var tuple = (Tuple<string, string, object>)_;
return ProcessInternal(tuple.Item1, tuple.Item2, tuple.Item3);
}, new Tuple<string, string, object>(sessionId, jsonRpc, context));
}
private static string ProcessInternal(string sessionId, string jsonRpc, object jsonRpcContext)
{
var handler = Handler.GetSessionHandler(sessionId);
try
{
Tuple<JsonRequest, JsonResponse>[] batch = null;
if (isSingleRpc(jsonRpc))
{
batch = new[] { Tuple.Create(JsonConvert.DeserializeObject<JsonRequest>(jsonRpc), new JsonResponse()) };
}
else
{
batch = JsonConvert.DeserializeObject<JsonRequest[]>(jsonRpc)
.Select(request => new Tuple<JsonRequest, JsonResponse>(request, new JsonResponse()))
.ToArray();
}
if (batch.Length == 0)
{
return Newtonsoft.Json.JsonConvert.SerializeObject(new JsonResponse
{
Error = handler.ProcessParseException(jsonRpc,
new JsonRpcException(3200, "Invalid Request", "Batch of calls was empty."))
});
}
foreach (var tuple in batch)
{
var jsonRequest = tuple.Item1;
var jsonResponse = tuple.Item2;
if (jsonRequest == null)
{
jsonResponse.Error = handler.ProcessParseException(jsonRpc,
new JsonRpcException(-32700, "Parse error",
"Invalid JSON was received by the server. An error occurred on the server while parsing the JSON text."));
}
else
{
jsonResponse.Id = jsonRequest.Id;
if (jsonRequest.Method == null)
{
jsonResponse.Error = handler.ProcessParseException(jsonRpc,
new JsonRpcException(-32600, "Invalid Request", "Missing property 'method'"));
}
else
{
var data = handler.Handle(jsonRequest, jsonRpcContext);
if (data == null) continue;
jsonResponse.Error = data.Error;
jsonResponse.Result = data.Result;
}
}
}
var responses = new string[batch.Count(x => x.Item2.Id != null || x.Item2.Error != null)];
var idx = 0;
foreach (var resp in batch.Where(x => x.Item2.Id != null || x.Item2.Error != null))
{
if (resp.Item2.Result == null && resp.Item2.Error == null)
{
// Per json rpc 2.0 spec
// result : This member is REQUIRED on success.
// This member MUST NOT exist if there was an error invoking the method.
// Either the result member or error member MUST be included, but both members MUST NOT be included.
resp.Item2.Result = new Newtonsoft.Json.Linq.JValue((Object)null);
}
responses[idx++] = JsonConvert.SerializeObject(resp.Item2);
}
return responses.Length == 0 ? string.Empty : responses.Length == 1 ? responses[0] : string.Format("[{0}]", string.Join(",", responses));
}
catch (Exception ex)
{
return Newtonsoft.Json.JsonConvert.SerializeObject(new JsonResponse
{
Error = handler.ProcessParseException(jsonRpc, new JsonRpcException(-32700, "Parse error", ex))
});
}
}
private static bool isSingleRpc(string json)
{
for (int i = 0; i < json.Length; i++)
{
if (json[i] == '{') return true;
else if (json[i] == '[') return false;
}
return true;
}
}
}