iot/projects/IoTCenter/Api/InfluxController.cs

using Infrastructure.Extensions;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

namespace IoTCenter.Api
{
    [ApiVersion("1.0")]
    [Route("api/v{version:apiVersion}/[controller]/[action]")]
    [ApiController]
    public class InfluxController : ControllerBase
    {
        private readonly IConfiguration _cfg;
        private readonly IHttpClientFactory _httpClientFactory;

        public InfluxController(IConfiguration cfg, IHttpClientFactory httpClientFactory)
        {
            this._cfg = cfg;
            this._httpClientFactory = httpClientFactory;
        }

        [HttpPost]
        public async Task<IActionResult> Query()
        {
            var server = this._cfg["influxdb:url"];
            var url = $"{server}/query";
            var data = new Dictionary<string, string>();
            foreach (var item in this.Request.Form)
            {
                try
                {
                    data.Add(item.Key, this.FromBase64(this.FromBase64(item.Value.ToString())));
                }
                catch (Exception ex)
                {
                    ex.PrintStack();
                    data.Add(item.Key, item.Value.ToString());
                }
            }
            using var content = new FormUrlEncodedContent(data);
            var client = _httpClientFactory.CreateClient();
            var result = await client.PostAsync(url, content).Result.Content.ReadAsStringAsync();
            return Content(result, "application/json");
        }

        private string FromBase64(string value)
        {
            return Encoding.UTF8.GetString(Convert.FromBase64String(value));
        }
    }
}