Ali Big Fish Simple Send SMS Function. net core Version

Ali Big Fish has not provided. net core version SDK, but provides related API. The following is the implementation of. net core version, which is just a simple SMS function:

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using Newtonsoft.Json;

namespace ConsoleApp1
{
  public class SmsHelper
  {
    public static string Post(string url, string data, Encoding encoding)
    {
      try
      {
        HttpWebRequest req = WebRequest.CreateHttp(new Uri(url));
        req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
        req.Method = "POST";
        req.Accept = "text/xml,text/javascript";
        req.ContinueTimeout = 60000;

        byte[] postData = encoding.GetBytes(data);
        Stream reqStream = req.GetRequestStreamAsync().Result;
        reqStream.Write(postData, 0, postData.Length);
        reqStream.Dispose();

        var rsp = (HttpWebResponse)req.GetResponseAsync().Result;
        var result = GetResponseAsString(rsp, encoding);
        return result;
      }
      catch (Exception ex)
      {
        throw;
      }
    }

    public static T Post<T>(string url, string data, Encoding encoding)
    {
      try
      {
        var result = Post(url, data, encoding);
        return JsonConvert.DeserializeObject<T>(result);
      }
      catch (Exception ex)
      {
        return default(T);
      }
    }

    public static string BuildQuery(IDictionary<string, string> parameters)
    {
      if (parameters == null || parameters.Count == 0)
      {
        return null;
      }

      StringBuilder query = new StringBuilder();
      bool hasParam = false;

      foreach (KeyValuePair<string, string> kv in parameters)
      {
        string name = kv.Key;
        string value = kv.Value;
        //  Ignore parameters with empty parameter name or parameter value 
        if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(value))
        {
          if (hasParam)
          {
            query.Append("&");
          }

          query.Append(name);
          query.Append("=");
          query.Append(WebUtility.UrlEncode(value));
          hasParam = true;
        }
      }

      return query.ToString();
    }

    public static string GetResponseAsString(HttpWebResponse rsp, Encoding encoding)
    {
      Stream stream = null;
      StreamReader reader = null;

      try
      {
        //  Read as a character stream HTTP Response 
        stream = rsp.GetResponseStream();
        reader = new StreamReader(stream, encoding);
        return reader.ReadToEnd();
      }
      finally
      {
        //  Release resources 
        if (reader != null) reader.Dispose();
        if (stream != null) stream.Dispose();
        if (rsp != null) rsp.Dispose();
      }
    }

    public static string GetAlidayuSign(IDictionary<string, string> parameters, string secret, string signMethod)
    {
      // Press the dictionary Key Alphabetical sorting of 
      IDictionary<string, string> sortedParams = new SortedDictionary<string, string>(parameters, StringComparer.Ordinal);

      // String all parameter names and parameter values in the 1 Rise 
      StringBuilder query = new StringBuilder();
      if (Constants.SIGN_METHOD_MD5.Equals(signMethod))
      {
        query.Append(secret);
      }
      foreach (KeyValuePair<string, string> kv in sortedParams)
      {
        if (!string.IsNullOrEmpty(kv.Key) && !string.IsNullOrEmpty(kv.Value))
        {
          query.Append(kv.Key).Append(kv.Value);
        }
      }

      // Use MD5/HMAC Encryption 
      if (Constants.SIGN_METHOD_HMAC.Equals(signMethod))
      {
        return Hmac(query.ToString(), secret);
      }
      else
      {
        query.Append(secret);
        return Md5(query.ToString());
      }
    }

    public static string Hmac(string value, string key)
    {
      byte[] bytes;
      using (var hmac = new HMACMD5(Encoding.UTF8.GetBytes(key)))
      {
        bytes = hmac.ComputeHash(Encoding.UTF8.GetBytes(value));
      }
      StringBuilder result = new StringBuilder();
      foreach (byte t in bytes)
      {
        result.Append(t.ToString("X2"));

      }
      return result.ToString();
    }

    public static string Md5(string value)
    {
      byte[] bytes;
      using (var md5 = MD5.Create())
      {
        bytes = md5.ComputeHash(Encoding.UTF8.GetBytes(value));
      }
      var result = new StringBuilder();
      foreach (byte t in bytes)
      {
        result.Append(t.ToString("X2"));
      }
      return result.ToString();
    }

    public static SmsResultAli SendSms(string url, string appKey, string appSecret, DateTime timestamp, Dictionary<string, string> parsms)
    {
      var txtParams = new SortedDictionary<string, string>();
      txtParams.Add(Constants.METHOD, "alibaba.aliqin.fc.sms.num.send");
      txtParams.Add(Constants.VERSION, "2.0");
      txtParams.Add(Constants.SIGN_METHOD, Constants.SIGN_METHOD_HMAC);
      txtParams.Add(Constants.APP_KEY, appKey);
      txtParams.Add(Constants.FORMAT, "json");
      txtParams.Add(Constants.TIMESTAMP, timestamp.ToString(Constants.DATE_TIME_FORMAT));
      txtParams.Add(Constants.SMS_TYPE, "normal");
      foreach (var item in parsms)
      {
        txtParams.Add(item.Key,item.Value);
      }

      txtParams.Add(Constants.SIGN, GetAlidayuSign(txtParams, appSecret, Constants.SIGN_METHOD_HMAC));
      var result = Post<SmsResultAli>(url, BuildQuery(txtParams), Encoding.UTF8);

      return result;
    }

  }

  public class SmsResultAli
  {
    public SmsResponseALi Alibaba_Aliqin_Fc_Sms_Num_Send_Response { get; set; }
  }

  public class SmsResponseALi
  {
    public string Request_Id { get; set; }
    public SmsResponseResultAli Result { get; set; }
  }

  public class SmsResponseResultAli
  {
    public string Err_Code { get; set; }

    public string Model { get; set; }

    public bool Success { get; set; }
  }
}

When sending a text message:

var parms = new Dictionary<string, string>();
  parms.Add(Constants.EXTEND, "123456");
  parms.Add(Constants.REC_NUM, "138********");
  parms.Add(Constants.SMS_FREE_SIGN_NAME, " Ali Big Fish ");
  parms.Add(Constants.SMS_PARAM, "{\"code\":\"1234\",\"product\":\" Ali Big Fish \"}");
  parms.Add(Constants.SMS_TEMPLATE_CODE, "SMS_10000000");

var req = SmsHelper.SendSms("http://gw.api.taobao.com/router/rest", "appKey", "appSecret", DateTime.Now, parms);