protected override void FetchHeadline()
{
channels.Clear();
// フィルターのクリア
channelsMatchesToFilterCache = null;
channelsUnmatchesToFilterCache = null;
fetchHeadlineFormatStatus = FetchHeadlineFormats.None;
// ヘッドラインが取得できない場合は取得を3回繰り返す。
// RSSタイプのヘッドラインが取得できないことがある。
for (int i = 0; (i < 3) && (fetchHeadlineFormatStatus != FetchHeadlineFormats.Rss); ++i)
{
fetchHeadline();
}
}
/// <summary>
/// ヘッドラインを取得する
/// </summary>
private void fetchHeadline()
{
fetchHeadlineFormatStatus = FetchHeadlineFormats.None;
Stream input = null;
XmlReader reader = null;
try
{
// 番組
Channel channel = null;
// Itemタグの中にいるか
bool inItenFlag = false;
// Enclosureの一時リスト
List <Enclosure> list = new List <Enclosure>();
// URLを生成
string seachWord;
if (Setting.SearchWord != string.Empty)
{
seachWord = "&search=" + Uri.EscapeUriString(Setting.SearchWord.Replace(' ', '+').Replace(" ", "+"));
}
// 検索単語が空の場合はサーバからヘッドラインが返ってこないので、"Top 40"ジャンルのヘッドラインを取得してごまかす
else
{
seachWord = "&genre=" + Uri.EscapeUriString("Top 40");
}
string limitStr = (Setting.PerView.ToString() != string.Empty) ? ("&limit=" + this.Setting.PerView) : string.Empty;
Uri uri = new Uri(SHOUTCAST_URL + "?rss=1" + seachWord + limitStr);
input = connectionSetting.CreateStream(uri);
reader = new XmlTextReader(input);
while (reader.Read())
{
if ((fetchCancel == true) || (fetchHeadlineFormatStatus == FetchHeadlineFormats.StationList))
{
return;
}
if (reader.NodeType == XmlNodeType.Element)
{
if ((fetchHeadlineFormatStatus == FetchHeadlineFormats.None) && (reader.LocalName == "rss"))
{
fetchHeadlineFormatStatus = FetchHeadlineFormats.Rss;
}
else if ((fetchHeadlineFormatStatus == FetchHeadlineFormats.None) && (reader.LocalName == "stationlist"))
{
fetchHeadlineFormatStatus = FetchHeadlineFormats.StationList;
}
else if (reader.LocalName == "item")
{
inItenFlag = true;
channel = new Channel();
} // End of item
// itemタグの中にいる場合
else if (inItenFlag)
{
if (reader.LocalName == "title")
{
channel.Title = reader.ReadString();
} // End of title
else if (reader.LocalName == "description")
{
channel.Description = reader.ReadString();
Match match = listenerRegex.Match(channel.Description);
if (match.Success == true)
{
try
{
channel.Listener = int.Parse(match.Groups[2].Value);
}
catch (ArgumentException) {; }
catch (FormatException) {; }
catch (OverflowException) {; }
}
Match match2 = bitRateRegex.Match(channel.Description);
if (match2.Success == true)
{
try
{
channel.Bitrate = int.Parse(match2.Groups[2].Value);
}
catch (ArgumentException) {; }
catch (FormatException) {; }
catch (OverflowException) {; }
}
} // End of description
else if (reader.LocalName == "category")
{
if (channel.Category == string.Empty)
{
channel.Category = reader.ReadString();
}
else
{
channel.Category = channel.Category + "," + reader.ReadString();
}
} // End of category
else if (reader.LocalName == "enclosure")
{
Uri url = null;
string length = string.Empty;
string type = string.Empty;
try
{
if (reader.MoveToFirstAttribute())
{
url = new Uri(reader.GetAttribute("url"));
length = reader.GetAttribute("length");
type = reader.GetAttribute("type");
}
if (length == null)
{
length = string.Empty;
}
if (type == null)
{
type = string.Empty;
}
// Enclosureタグの数だけ、 Enclosure一時リストにEnclosureの内容を追加していく
Enclosure item = new Enclosure(url, length, type);
if (item.IsPodcast())
{
list.Add(item);
}
}
catch (UriFormatException) {; }
} // End of enclosure
}
}
else if ((reader.NodeType == XmlNodeType.EndElement) && (reader.LocalName == "item"))
{
inItenFlag = false;
if (channel != null)
{
channel.DislpayFormat = this.Setting.DisplayFormat;
// Enclosureの要素の数だけ、Channelの複製を作る
if (list.Count != 0)
{
foreach (Enclosure enclosure in list)
{
Channel channel2 = (Channel)channel.Clone();
channel2.PlayUrl = enclosure.Url;
channel2.Length = enclosure.Length;
channel2.Type = enclosure.Type;
channels.Add(channel2);
OnChannelAdded(channel2);
}
}
}
// Enclosure一時リストをクリア
list.Clear();
channel = null;
}
} // End of itemタグの中にいる場合
}
finally
{
channelsMatchesToFilterCache = null;
channelsUnmatchesToFilterCache = null;
if (reader != null)
{
reader.Close();
}
if (input != null)
{
input.Close();
}
}
}