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using System.Linq;
using System.Xml.Linq;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Channels;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Querying;
using System.Globalization;
using System.IO;
using System.Security;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Emby.Dlna.Server;
namespace Emby.Dlna.ContentDirectory
{
public class ContentDirectoryBrowser
{
private readonly IHttpClient _httpClient;
private readonly ILogger _logger;
public ContentDirectoryBrowser(IHttpClient httpClient, ILogger logger)
{
_httpClient = httpClient;
_logger = logger;
}
private static XNamespace UNamespace = "u";
public async Task<QueryResult<ChannelItemInfo>> Browse(ContentDirectoryBrowseRequest request, CancellationToken cancellationToken)
{
var options = new HttpRequestOptions
{
CancellationToken = cancellationToken,
UserAgent = "Emby",
RequestContentType = "text/xml; charset=\"utf-8\"",
LogErrorResponseBody = true,
Url = request.ContentDirectoryUrl,
BufferContent = false
};
options.RequestHeaders["SOAPACTION"] = "urn:schemas-upnp-org:service:ContentDirectory:1#Browse";
options.RequestContent = GetRequestBody(request);
var response = await _httpClient.SendAsync(options, "POST");
using (var reader = new StreamReader(response.Content))
{
var doc = XDocument.Parse(reader.ReadToEnd(), LoadOptions.PreserveWhitespace);
var queryResult = new QueryResult<ChannelItemInfo>();
if (doc.Document == null)
return queryResult;
var responseElement = doc.Document.Descendants(UNamespace + "BrowseResponse").ToList();
var countElement = responseElement.Select(i => i.Element("TotalMatches")).FirstOrDefault(i => i != null);
var countValue = countElement == null ? null : countElement.Value;
int count;
if (!string.IsNullOrWhiteSpace(countValue) && int.TryParse(countValue, NumberStyles.Integer, CultureInfo.InvariantCulture, out count))
{
queryResult.TotalRecordCount = count;
var resultElement = responseElement.Select(i => i.Element("Result")).FirstOrDefault(i => i != null);
var resultString = (string)resultElement;
if (resultElement != null)
{
var xElement = XElement.Parse(resultString);
}
}
return queryResult;
}
}
private string GetRequestBody(ContentDirectoryBrowseRequest request)
{
var builder = new StringBuilder();
builder.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
builder.Append("<s:Envelope s:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\" xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\"><s:Body>");
builder.Append("<u:Browse xmlns:u=\"urn:schemas-upnp-org:service:ContentDirectory:1\">");
if (string.IsNullOrWhiteSpace(request.ParentId))
{
request.ParentId = "1";
}
builder.AppendFormat("<ObjectID>{0}</ObjectID>", DescriptionXmlBuilder.Escape(request.ParentId));
builder.Append("<BrowseFlag>BrowseDirectChildren</BrowseFlag>");
//builder.Append("<BrowseFlag>BrowseMetadata</BrowseFlag>");
builder.Append("<Filter>*</Filter>");
request.StartIndex = request.StartIndex ?? 0;
builder.AppendFormat("<StartingIndex>{0}</StartingIndex>", DescriptionXmlBuilder.Escape(request.StartIndex.Value.ToString(CultureInfo.InvariantCulture)));
request.Limit = request.Limit ?? 20;
if (request.Limit.HasValue)
{
builder.AppendFormat("<RequestedCount>{0}</RequestedCount>", DescriptionXmlBuilder.Escape(request.Limit.Value.ToString(CultureInfo.InvariantCulture)));
}
builder.Append("<SortCriteria></SortCriteria>");
builder.Append("</u:Browse>");
builder.Append("</s:Body></s:Envelope>");
return builder.ToString();
}
}
public class ContentDirectoryBrowseRequest
{
public int? StartIndex { get; set; }
public int? Limit { get; set; }
public string ParentId { get; set; }
public string ContentDirectoryUrl { get; set; }
}
}
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