88 lines
2.3 KiB
C#
88 lines
2.3 KiB
C#
using Godot;
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using System;
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using System.Threading;
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using BITKit.Packages.Core.LazyLoad;
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using HttpClient = System.Net.Http.HttpClient;
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namespace BITKit;
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public partial class HttpGet : Node,IActivable
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{
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/// <summary>
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/// 访问的Url
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/// </summary>
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[Export] private string url;
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/// <summary>
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/// 是否启用
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/// </summary>
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[Export]
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public bool Enabled { get; set; } = true;
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[Signal]
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public delegate void OnGetEventHandler(string httpContext);
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[Signal]
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public delegate void OnExceptionEventHandler(string exception);
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/// <summary>
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/// 请求数据的间隔
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/// </summary>
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private readonly IntervalTimer _intervalTimer = new(1);
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/// <summary>
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/// http客户端
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/// </summary>
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private readonly HttpClient httpClient=new();
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/// <summary>
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/// 取消令牌，用于取消Http Get
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/// </summary>
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private CancellationToken _cancellationToken;
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private bool allowNextRequest = true;
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public override void _Ready()
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{
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_cancellationToken = new CancellationToken();
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}
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/// <summary>
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/// 物理帧用于控制并发和间隔的同时请求数据
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/// </summary>
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/// <param name="delta"></param>
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public override void _PhysicsProcess(double delta)
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{
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if (Enabled is false) return;
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//等待依赖加载
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//请求间隔控制+请求并发控制
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if (_intervalTimer.Allow is false) return;
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//如果url为空
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if (string.IsNullOrEmpty(url)) return;
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//发送请求
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if (allowNextRequest)
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Request();
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}
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private async void Request()
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{
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allowNextRequest = false;
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//获取json
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try
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{
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var json = await httpClient.GetStringAsync(url, _cancellationToken);
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//取消执行，如果已取消令牌
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_cancellationToken.ThrowIfCancellationRequested();
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//调用回调
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EmitSignal(nameof(OnGet), json);
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}
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catch (InvalidOperationException)
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{
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BIT4Log.Warning(url);
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}
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catch (OperationCanceledException)
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{
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}
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catch (Exception e)
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{
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EmitSignal(nameof(OnException), e.Message);
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}
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allowNextRequest = true;
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}
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public void SetActive(bool active) => Enabled=active;
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}
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