JsonRpcRequestManager.cs

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 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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using System;
using System.Net;
using System.Net.Sockets;
using System.Reflection;
using System.Text;
using System.IO;
using OpenMetaverse.StructuredData;
using OpenMetaverse;
using log4net;

namespace OpenSim.Framework.Servers.HttpServer
{
    public class JsonRpcRequestManager
    {
        static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        
        public JsonRpcRequestManager()
        {
        }

        public bool JsonRpcRequest(ref object parameters, string method, string uri, string jsonId)
        {
            if (jsonId == null)
                throw new ArgumentNullException("jsonId");
            if (uri == null)
                throw new ArgumentNullException("uri");
            if (method == null)
                throw new ArgumentNullException("method");
            if (parameters == null)
                throw new ArgumentNullException("parameters");

            OSDMap request = new OSDMap();
            request.Add("jsonrpc", OSD.FromString("2.0"));
            request.Add("id", OSD.FromString(jsonId));
            request.Add("method", OSD.FromString(method));
            request.Add("params", OSD.SerializeMembers(parameters));

            OSDMap response;
            try
            {
                response = WebUtil.PostToService(uri, request, 10000, true);
            }
            catch (Exception e)
            {
                m_log.Debug(string.Format("JsonRpc request '{0}' to {1} failed", method, uri), e);
                return false;
            }

            if (!response.ContainsKey("_Result"))
            {
                m_log.DebugFormat("JsonRpc request '{0}' to {1} returned an invalid response: {2}",
                    method, uri, OSDParser.SerializeJsonString(response));
                return false;
            }
            response = (OSDMap)response["_Result"];

            OSD data;

            if (response.ContainsKey("error"))
            {
                data = response["error"];
                m_log.DebugFormat("JsonRpc request '{0}' to {1} returned an error: {2}",
                    method, uri, OSDParser.SerializeJsonString(data));
                return false;
            }

            if (!response.ContainsKey("result"))
            {
                m_log.DebugFormat("JsonRpc request '{0}' to {1} returned an invalid response: {2}",
                    method, uri, OSDParser.SerializeJsonString(response));
                return false;
            }

            data = response["result"];
            OSD.DeserializeMembers(ref parameters, (OSDMap)data);

            return true;
        }

        public bool JsonRpcRequest(ref OSD data, string method, string uri, string jsonId)
        {
            if (string.IsNullOrEmpty(jsonId))
                jsonId = UUID.Random().ToString();

            OSDMap request = new OSDMap();
            request.Add("jsonrpc", OSD.FromString("2.0"));
            request.Add("id", OSD.FromString(jsonId));
            request.Add("method", OSD.FromString(method));
            request.Add("params", data);

            OSDMap response;
            try
            {
                response = WebUtil.PostToService(uri, request, 10000, true);
            }
            catch (Exception e)
            {
                m_log.Debug(string.Format("JsonRpc request '{0}' to {1} failed", method, uri), e);
                return false;
            }

            if (!response.ContainsKey("_Result"))
            {
                m_log.DebugFormat("JsonRpc request '{0}' to {1} returned an invalid response: {2}",
                    method, uri, OSDParser.SerializeJsonString(response));
                return false;
            }
            response = (OSDMap)response["_Result"];

            if (response.ContainsKey("error"))
            {
                data = response["error"];
                m_log.DebugFormat("JsonRpc request '{0}' to {1} returned an error: {2}",
                    method, uri, OSDParser.SerializeJsonString(data));
                return false;
            }

            data = response;

            return true;
        }
    
    }
}