1. Explain the WeChat applet AccessToken

Get the interface instructions in the same way as the public number, specify the appid and appsecret, and use get requests to get them.

Currently encapsulated and used in.net Core:

/// <summary>
/// AccessToken Status Value Maintenance
/// </summary>
public class AccessTokenManage
{
    /// <summary>
    ///Applet token 
    /// </summary>
    public static string AccessToken = null;
    /// <summary>
    ///Expiration time
    /// </summary>
    public static DateTime NextTime { get; set; }
    /// <summary>
    ///Specifies whether the current thread can run
    /// </summary>
    private static bool EnableRun = true;
    /// <summary>
    ///Start maintenance
    /// </summary>
    public static void Run()
    {
        if (AccessToken == null)
        {
            Task.Factory.StartNew(() =>
            {
                while (EnableRun)
                {
                    //Timeout Re, Get
                    //1. Get access_token first
                    RequestAccessToken();
                    //Polling per minute
                    Thread.Sleep(60000);
                }
            });
        }
    }

    /*
    access_token The public number is the globally unique ticket that calls each interface using access_token.Developers need to save properly.
    access_token Store in at least 512 character spaces.
    access_token The validity period is currently 2 hours and needs to be refreshed periodically. Repeated fetches will invalidate access_token acquired last time.
    */
    public static void RequestAccessToken()
    {
        try
        {
            string url = new LinkManage().GetAccessToken();
            string result = NetHelper.Get(url);
            Access_TokenData data = JsonConvert.DeserializeObject<Access_TokenData>(result);
            if (string.IsNullOrEmpty(data.access_token))
            {
                throw new Exception("Deserialization Get Access_TokenData fail");
            }

            //Success
            AccessToken = data.access_token;
            NextTime = DateTime.Now.AddSeconds(data.expires_in - 60);

            //Test Code
            LogHelper.Write("Refresh Access_Token Success:" + AccessToken);
        }
        catch (Exception ex)
        {
            throw new Exception("Obtain AccessToken fail", ex);
        }
    }
    /// <summary>
    ///Result object returned by request
    /// </summary>
    public class Access_TokenData
    {
        public string access_token { get; set; }
        public int expires_in { get; set; }
        public string errcode { get; set; }
        public string errmsg { get; set; }
    }
}

2. Start maintenance in program Startup

        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;

            //Configure refresh access_token
            MiniPackage.AccessTokenManage.Run();
        }

 

3. Use static variables directly elsewhere.

 

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