114 lines
4.9 KiB
C#
114 lines
4.9 KiB
C#
using Common.Notify;
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using Model.Entity.Inspection;
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using Service.Interface;
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using Microsoft.Extensions.Logging;
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using System;
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using System.Collections.Generic;
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using System.Net.Http;
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using System.Text;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Service.Implement
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{
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/// <summary>
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/// 飞书群机器人通知发送器（自定义机器人 Webhook，支持加签校验）
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/// 报文：msg_type=post 富文本，用 at 标签(user_id=open_id)真正 @ 人；加签时附 timestamp(秒)+sign（算法见 ImWebhookSigner.FeishuSign）
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/// </summary>
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public class FeishuNotifier : IAlertNotifier
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{
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private readonly HttpClient _httpClient;
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private readonly ILogger<FeishuNotifier> _logger;
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public FeishuNotifier(HttpClient httpClient, ILogger<FeishuNotifier> logger)
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{
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_httpClient = httpClient;
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_logger = logger;
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}
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public NotifyChannelTypeEnum ChannelType => NotifyChannelTypeEnum.Feishu;
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public async Task<NotifyResult> SendAsync(AlertNotifyMessage message, string webhookUrl, string? secret, CancellationToken ct = default)
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{
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try
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{
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// 飞书 text 消息不支持结构化 @，必须用 post 富文本 + at 标签才能真正 @ 到人。
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// at 标签的 user_id 为飞书 open_id(ou_ 开头)；如需 @ 所有人，接收人填 "all"。
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var contentLines = new List<List<Dictionary<string, object>>>();
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foreach (var raw in (message.Content ?? string.Empty).Split('\n'))
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{
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var line = raw.TrimEnd('\r');
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if (line.Length == 0) continue;
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contentLines.Add(new List<Dictionary<string, object>>
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{
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new Dictionary<string, object> { ["tag"] = "text", ["text"] = line }
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});
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}
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if (message.AtMobiles.Count > 0)
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{
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var atLine = new List<Dictionary<string, object>>
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{
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new Dictionary<string, object> { ["tag"] = "text", ["text"] = "关注人: " }
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};
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foreach (var openId in message.AtMobiles)
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{
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if (string.IsNullOrWhiteSpace(openId)) continue;
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atLine.Add(new Dictionary<string, object> { ["tag"] = "at", ["user_id"] = openId.Trim() });
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}
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contentLines.Add(atLine);
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}
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var body = new Dictionary<string, object>
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{
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["msg_type"] = "post",
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["content"] = new Dictionary<string, object>
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{
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["post"] = new Dictionary<string, object>
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{
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["zh_cn"] = new Dictionary<string, object>
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{
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["title"] = message.Title,
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["content"] = contentLines
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}
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}
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}
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};
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// 加签：timestamp(秒) + sign
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if (!string.IsNullOrWhiteSpace(secret))
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{
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long timestampSec = DateTimeOffset.Now.ToUnixTimeSeconds();
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body["timestamp"] = timestampSec.ToString();
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body["sign"] = ImWebhookSigner.FeishuSign(timestampSec, secret);
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}
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string json = JsonSerializer.Serialize(body);
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_logger.LogInformation("飞书推送(post富文本) @open_id=[{At}]", string.Join(",", message.AtMobiles));
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using var content = new StringContent(json, Encoding.UTF8, "application/json");
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using var response = await _httpClient.PostAsync(webhookUrl, content, ct);
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string respText = await response.Content.ReadAsStringAsync(ct);
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if (!response.IsSuccessStatusCode)
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{
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return NotifyResult.Fail($"HTTP {(int)response.StatusCode}: {Truncate(respText)}");
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}
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// 飞书返回 {"code":0,...}（旧版为 {"StatusCode":0,...}）
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using var doc = JsonDocument.Parse(respText);
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var root = doc.RootElement;
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bool ok = (root.TryGetProperty("code", out var code) && code.GetInt32() == 0)
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|| (root.TryGetProperty("StatusCode", out var sc) && sc.GetInt32() == 0);
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return ok ? NotifyResult.Ok() : NotifyResult.Fail(Truncate(respText));
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}
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catch (Exception ex)
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{
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return NotifyResult.Fail($"飞书推送异常: {NotifyError.Describe(ex)}");
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}
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}
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private static string Truncate(string s, int max = 200) =>
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string.IsNullOrEmpty(s) || s.Length <= max ? s : s.Substring(0, max) + "...";
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}
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}
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