C# json數據流解析，可解決粘包、斷包、壞包問題

說明

• 使用 Json.NET

• 官方例程：https://www.newtonsoft.com/json/help/html/ReadMultipleContentWithJsonReader.htm

• 使用泛型，可直接對已知數據格式JSON反序列化

• 如只想分割JSON，可使用 public object Deserialize(JsonReader reader);
• 歡迎評論補充

---

代碼塊

可直接作爲類使用

public class JsonParse<T>
    {
        static MemoryStream fileStream = new MemoryStream();
        static StreamWriter outerstr = new StreamWriter(fileStream);
        static StreamReader inerstr = new StreamReader(fileStream, true);
        //json數據解析方法，返回解析出的數據
        static int streamPosition = 0;  //記錄解析數據到流的哪個位置
        static AutoResetEvent jsonEvent = new AutoResetEvent(true);//調用一次Set()只能繼續被阻塞的一個線程,區別ManualResetEvent 

        public void JsonPush(string cmd)
        {
            jsonEvent.WaitOne();
            fileStream.Position = fileStream.Length;
            outerstr.Write(cmd);
            outerstr.Flush();
            jsonEvent.Set();
        }
        public IList<T> JsonPop()
        {
            jsonEvent.WaitOne();
            IList<T> roles = new List<T>();
            fileStream.Position = streamPosition;
            inerstr = new StreamReader(fileStream, true);
            JsonTextReader reader = new JsonTextReader(inerstr);
            reader.SupportMultipleContent = true;

            int readerP = 0;
            while (true)
            {
                try
                {
                    if (!reader.Read())
                    {
                        break;
                    }
                    JsonSerializer serializer = new JsonSerializer();
                    serializer.DefaultValueHandling = DefaultValueHandling.Ignore;
                    //object ob= serializer.Deserialize(reader);
                    T role = serializer.Deserialize<T>(reader);
                    roles.Add(role);
                    readerP = reader.LinePosition;
                }
                catch (Exception e)
                {

                    Console.WriteLine("JsonParse error.");
                    try
                    {
                        byte[] inerstrData = new byte[1];
                        Stream s = inerstr.BaseStream;
                        s.Seek(streamPosition+readerP, 0);
                        s.Read(inerstrData, 0, 1);
                        //inerstr.ReadBlock(inerstrData, readerP,1);
                        long restLength = fileStream.Length - streamPosition;
                        if (inerstrData[0] == 0x7b)
                        {
                            //s.Close();
                            break;
                        }
                        else
                        {
                            for (readerP = readerP + 1; readerP <= restLength; readerP++)
                            {
                                //inerstr.ReadBlock(inerstrData, readerP, 1);
                                s.Read(inerstrData, 0, 1);
                                if (inerstrData[0] == 0x7b)
                                {
                                    //s.Close();
                                    break;
                                }
                            }
                            if (readerP > restLength-5)
                            {
                                //s.Close();
                                break;
                            }
                            else
                            {
                                streamPosition += readerP;
                                readerP = 0;
                                fileStream.Position = streamPosition;
                                inerstr = new StreamReader(fileStream, true);

                                reader = new JsonTextReader(inerstr);
                                reader.SupportMultipleContent = true;
                                //s.Close();
                                continue;
                            }

                        }
                    }
                    catch (Exception ex)
                    {
                        fileStream = new MemoryStream();
                        outerstr = new StreamWriter(fileStream);
                        inerstr = new StreamReader(fileStream, true);
                        break;
                    }
                }

                //DataTable dt = new DataTable();
                //dt = JsonConvert.DeserializeObject<DataTable>(reader.);               
            }
            streamPosition += readerP;
            if ((streamPosition > 10240) && (streamPosition == fileStream.Length))
            {
                fileStream = new MemoryStream();
                outerstr = new StreamWriter(fileStream);
                inerstr = new StreamReader(fileStream, true);
                streamPosition = 0;
            }
            jsonEvent.Set();
            return roles;

        }
    }