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);
}
}
}