三、Http API說明

Tushare HTTP資料獲取的方式，採用了post的機制，通過提交JSON body引數，就可以獲得您想要的資料。具體引數說明如下：

輸入引數

api_name：介面名稱，比如stock_basic

token ：使用者唯一標識，可通過登入pro網站獲取

params：介面引數，如daily介面中start_date和end_date

fields：欄位列表，用於介面獲取指定的欄位，以逗號分隔，如"open,high,low,close"

輸出引數

code： 介面返回碼，2002表示許可權問題。

msg：錯誤資訊，比如“系統內部錯誤”，“沒有許可權”等

data：資料，data裡包含fields和items欄位，分別為欄位和資料內容

四、c#(.net core)實現

1、在Visual Studio中安裝下面幾個包：Microsoft.Extensions.Http、Newtonsoft.Json

2、封裝方法，實現對REST web service的呼叫

public interface IHttpClientUtility
{
     string HttpClientPost(string url, object datajson);
}

public class HttpClientUtility : IHttpClientUtility
    {
        

        public HttpClientUtility()
        {
            
        }
        public  string HttpClientPost(string url, object datajson)
        {
            using (HttpClient httpClient = new HttpClient()) //http物件
            {
                httpClient.DefaultRequestHeaders.Accept.Clear();
                httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                httpClient.Timeout = new TimeSpan(0, 0, 5);
                //轉為連結需要的格式
                HttpContent httpContent = new JsonContent(datajson);
                //請求
                HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;
                if (response.IsSuccessStatusCode)
                {
                    Task<string> t = response.Content.ReadAsStringAsync();
                    return t.Result;
                }
                throw new Exception("呼叫失敗");
            }
                                                                       
        }
    }

    public class JsonContent : StringContent
    {
        public JsonContent(object value)
            : base(JsonConvert.SerializeObject(value), Encoding.UTF8,
                "application/json")
        {
        }

        public JsonContent(object value, string mediaType)
            : base(JsonConvert.SerializeObject(value), Encoding.UTF8, mediaType)
        {
        }
    }

3、封裝對Tu Share API的呼叫

public  class TuShareUtility 
    {
        private IHttpClientUtility _httpClientUtility;
        private string _url = "http://api.waditu.com/";
        
        public TuShareUtility(IHttpClientUtility httpClientUtility)
        {
            _httpClientUtility = httpClientUtility;
        }

        /// <summary>
        /// 呼叫TuShare API
        /// </summary>
        /// <param name="apiName"></param>
        /// <param name="parmaMap"></param>
        /// <param name="fields"></param>
        /// <returns></returns>
        public  DataTable GetData(string apiName,Dictionary<string,string> parmaMap,params string[] fields)
        {
            var tuShareParamObj=new TuShareParamObj(){ ApiName = apiName ,Params = parmaMap,Fields = string.Join(",",fields)};
            //做Http呼叫
            var result=_httpClientUtility.HttpClientPost(_url, tuShareParamObj);
            //將返回結果序列化成物件
            var desResult=JsonConvert.DeserializeObject<TuShareResult>(result);
            //如果呼叫失敗，丟擲異常
            if(!string.IsNullOrEmpty(desResult.Msg))
                throw new Exception(desResult.Msg);
            //返回結果分成兩部分，一部分是列頭資訊，另一部分是資料本身，用這兩部分資料可以構建DataTable
            DataTable dt = new DataTable();
            foreach (var dataField in desResult.Data.Fields)
            {
                dt.Columns.Add(dataField);
            }

            foreach (var dataItemRow in desResult.Data.Items)
            {
                var newdr=dt.NewRow();
                for (int i=0;i< dataItemRow.Length;i++)
                {
                    newdr[i] = dataItemRow[i];
                }

                dt.Rows.Add(newdr);
            }
            return dt;
        }

        private class TuShareParamObj
        {
            [JsonProperty("api_name")]
            public string ApiName { get; set; }

            [JsonProperty("token")]
            public string Token { get; } = "****************";//你的Token

            [JsonProperty("params")]
            public Dictionary<string, string> Params { get; set; }

            [JsonProperty("fields")]
            public string Fields { get; set; }
        }

        private class TuShareData
        {
            [JsonProperty("fields")]
            public string[] Fields { get; set; }

            [JsonProperty("items")]
            public string[][] Items { get; set; }
        }

        private class TuShareResult
        {
            [JsonProperty("code")]
            public string Code { get; set; }

            [JsonProperty("msg")]
            public string Msg { get; set; }

            [JsonProperty("data")]
            public TuShareData Data { get; set; }
        }
    }

4、呼叫示例

獲得日線行情，整個過程1秒左右，返回6月24日，股票相關交易資訊，程式碼如下，(該網站的其它介面定義可以到https://tushare.pro/document/2檢視)

var tuShareUtility=new TuShareUtility();
Dictionary<string, string> p = new Dictionary<string, string>();
p["trade_date"] = "20200624";
var table = tuShareUtility.GetData("daily", p, "");

返回如下結果

返回欄位說明