public async Task EnableAsync() { if (Enabled) { return; } Logger.Info("JMAXMLを有効化しています。"); // 短期フィードを過去に受信したことがないか、追跡時間を過ぎている場合長期フィードを受信する if (ShortFeedLastModified is not DateTimeOffset mod || (DateTimeOffset.Now - mod).TotalMinutes > 9) { Logger.Info("長期フィード受信中..."); await ProcessFeed(true, true); } Logger.Info("短期フィード受信中..."); await ProcessFeed(false, true); EarthquakeUpdatedEvent.Publish(null); Enabled = true; }
private async Task ProcessFeed(bool useLongFeed, bool disableNotice) { using var request = new HttpRequestMessage(HttpMethod.Get, useLongFeed ? "http://www.data.jma.go.jp/developer/xml/feed/eqvol_l.xml" : "http://www.data.jma.go.jp/developer/xml/feed/eqvol.xml"); DateTimeOffset?lastModified; if (useLongFeed) { lastModified = LongFeedLastModified; } else { lastModified = ShortFeedLastModified; } // 初回取得じゃない場合チェックしてもらう if (lastModified != null) { request.Headers.IfModifiedSince = lastModified; } using var response = await Client.SendAsync(request); if (response.StatusCode == HttpStatusCode.NotModified) { Logger.Debug("JMAXMLフィード - NotModified"); return; } Logger.Debug($"JMAXMLフィード更新処理開始 Last:{lastModified:yyyy/MM/dd HH:mm:ss} Current:{response.Content.Headers.LastModified:yyyy/MM/dd HH:mm:ss}"); using var reader = XmlReader.Create(await response.Content.ReadAsStreamAsync()); var feed = SyndicationFeed.Load(reader); // 求めているものを新しい順で舐める var matchItems = feed.Items.Where(i => ParseTitles.Any(t => t == i.Title.Text)); if (useLongFeed) { matchItems = matchItems.OrderByDescending(i => i.LastUpdatedTime); } else { matchItems = matchItems.OrderBy(i => i.LastUpdatedTime); } // URLにないものを抽出 foreach (var item in matchItems) { if (ParsedMessages.Contains(item.Id)) { continue; } Logger.Trace($"処理 {item.LastUpdatedTime:yyyy/MM/dd HH:mm:ss} {item.Title.Text}"); if (!Directory.Exists(CacheFolderName)) { Directory.CreateDirectory(CacheFolderName); } int retry = 0; // リトライループ while (true) { var cresponse = await Client.SendAsync(new HttpRequestMessage(HttpMethod.Get, item.Links[0].Uri)); if (cresponse.StatusCode != HttpStatusCode.OK) { retry++; if (retry >= 10) { Logger.Warning($"XMLの取得に失敗しました! Status: {cresponse.StatusCode} Url: {item.Links[0].Uri}"); break; } continue; } // TODO: もう少し綺麗にしたい try { var cacheFilePath = Path.Join(CacheFolderName, Path.GetFileName(item.Links[0].Uri.ToString())); if (!File.Exists(cacheFilePath)) { using var wstr = File.OpenWrite(cacheFilePath); await(await cresponse.Content.ReadAsStreamAsync()).CopyToAsync(wstr); } using var rstr = File.OpenRead(cacheFilePath); var report = (Report)ReportSerializer.Deserialize(rstr); // TODO: EventIdの異なる電文に対応する var eq = Earthquakes.FirstOrDefault(e => e.Id == report.Head.EventID); if (!useLongFeed || eq == null) { if (eq == null) { eq = new Earthquake { Id = report.Head.EventID, IsSokuhou = true, Intensity = JmaIntensity.Unknown }; if (useLongFeed) { Earthquakes.Add(eq); } else { Earthquakes.Insert(0, eq); } } switch (report.Control.Title) { case "震度速報": { if (!eq.IsSokuhou) { break; } eq.IsSokuhou = true; eq.OccurrenceTime = report.Head.TargetDateTime; eq.IsReportTime = true; var infoItem = report.Head.Headline.Informations.First().Items.First(); eq.Intensity = infoItem.Kind.Name.Replace("震度", "").ToJmaIntensity(); eq.Place = infoItem.Areas.Area.First().Name; break; } case "震源に関する情報": { eq.IsSokuhou = false; eq.OccurrenceTime = report.Body.Earthquake.OriginTime; eq.IsReportTime = false; eq.Place = report.Body.Earthquake.Hypocenter.Area.Name; eq.Magnitude = report.Body.Earthquake.Magnitude.Value; eq.Depth = report.Body.Earthquake.Hypocenter.Area.Coordinate.GetDepth() ?? -1; break; } case "震源・震度に関する情報": { eq.IsSokuhou = false; eq.OccurrenceTime = report.Body.Earthquake.OriginTime; eq.IsReportTime = false; eq.Intensity = report.Body.Intensity?.Observation?.MaxInt?.ToJmaIntensity() ?? JmaIntensity.Unknown; eq.Place = report.Body.Earthquake.Hypocenter.Area.Name; eq.Magnitude = report.Body.Earthquake.Magnitude.Value; eq.Depth = report.Body.Earthquake.Hypocenter.Area.Coordinate.GetDepth() ?? -1; break; } default: Logger.Error("不明なTitleをパースしました。: " + report.Control.Title); break; } if (!disableNotice) { EarthquakeUpdatedEvent.Publish(eq); } } } catch (Exception ex) { Logger.Error("デシリアライズ時に例外が発生しました。 " + ex); } ParsedMessages.Add(item.Id); break; } if (useLongFeed && Earthquakes.Count > 10) { break; } } if (!useLongFeed && Earthquakes.Count > 20) { Earthquakes.RemoveRange(20, Earthquakes.Count - 20); } if (ParsedMessages.Count > 100) { ParsedMessages.RemoveRange(100, ParsedMessages.Count - 100); } if (useLongFeed) { LongFeedLastModified = response.Content.Headers?.LastModified?.UtcDateTime; } else { ShortFeedLastModified = response.Content.Headers?.LastModified?.UtcDateTime; } // キャッシュフォルダのクリーンアップ var cachedFiles = Directory.GetFiles(CacheFolderName, "*.xml"); if (cachedFiles.Length < 20) // 20件以内なら削除しない { return; } foreach (var file in cachedFiles) { if (DateTime.Now - File.GetCreationTime(file) > TimeSpan.FromDays(10)) { File.Delete(file); } } }