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Update WmtsCapabilities.cs

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This commit is contained in:
ClemensF 2020-11-03 12:47:50 +01:00
parent 0a17a73949
commit 28b76ec73f
1 changed files with 63 additions and 9 deletions
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72
MapControl/Shared/WmtsCapabilities.cs
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@ -28,18 +28,18 @@ namespace MapControl
{
using (var stream = await ImageLoader.HttpClient.GetStreamAsync(capabilitiesUri))
{
capabilities = ReadCapabilities(XDocument.Load(stream).Root, layerIdentifier);
capabilities = ReadCapabilities(XDocument.Load(stream).Root, layerIdentifier, capabilitiesUri.ToString());
}
}
else
{
capabilities = ReadCapabilities(XDocument.Load(capabilitiesUri.ToString()).Root, layerIdentifier);
capabilities = ReadCapabilities(XDocument.Load(capabilitiesUri.ToString()).Root, layerIdentifier, null);
}
return capabilities;
}
public static WmtsCapabilities ReadCapabilities(XElement capabilitiesElement, string layerIdentifier)
public static WmtsCapabilities ReadCapabilities(XElement capabilitiesElement, string layerIdentifier, string capabilitiesUrl)
{
XNamespace ns = capabilitiesElement.Name.Namespace;
XNamespace ows = "http://www.opengis.net/ows/1.1";
@ -75,12 +75,7 @@ namespace MapControl
layerIdentifier = layerElement.Element(ows + "Identifier")?.Value ?? "";
}
var urlTemplate = layerElement.Element(ns + "ResourceURL")?.Attribute("template")?.Value;
if (string.IsNullOrEmpty(urlTemplate))
{
throw new ArgumentException("No valid ResourceURL element found in Layer \"" + layerIdentifier + "\".");
}
var urlTemplate = ReadUrlTemplate(layerElement, layerIdentifier, capabilitiesUrl);
var styleElement = layerElement.Descendants(ns + "Style")
.FirstOrDefault(e => e.Attribute("isDefault")?.Value == "true");
@ -128,6 +123,65 @@ namespace MapControl
};
}
public static string ReadUrlTemplate(XElement layerElement, string layerIdentifier, string capabilitiesUrl)
{
XNamespace ns = layerElement.Name.Namespace;
const string formatPng = "image/png";
const string formatJpg = "image/jpeg";
string urlTemplate = null;
var resourceUrls = layerElement.Descendants(ns + "ResourceURL")
.ToLookup(e => e.Attribute("format")?.Value ?? "", e => e.Attribute("template")?.Value ?? "");
if (resourceUrls.Any())
{
var urlTemplates
= resourceUrls.Contains(formatPng) ? resourceUrls[formatPng]
: resourceUrls.Contains(formatJpg) ? resourceUrls[formatJpg]
: resourceUrls.First();
urlTemplate = urlTemplates.FirstOrDefault();
}
else if (capabilitiesUrl != null)
{
var requestIndex = capabilitiesUrl.IndexOf("Request=GetCapabilities", StringComparison.OrdinalIgnoreCase);
if (requestIndex > 0)
{
var formats = layerElement.Descendants(ns + "Format").Select(e => e.Value).ToList();
if (formats.Count == 0)
{
throw new ArgumentException("No Format element found in Layer \"" + layerIdentifier + "\".");
}
var format
= formats.Contains(formatPng) ? formatPng
: formats.Contains(formatJpg) ? formatJpg
: formats[0];
urlTemplate = capabilitiesUrl.Substring(0, requestIndex)
+ "Request=GetTile"
+ capabilitiesUrl.Substring(requestIndex + 23)
+ "&Version=1.0.0"
+ "&Layer=" + layerIdentifier
+ "&Format=" + format
+ "&Style={Style}"
+ "&TileMatrixSet={TileMatrixSet}"
+ "&TileMatrix={TileMatrix}"
+ "&TileCol={TileCol}"
+ "&TileRow={TileRow}";
}
}
if (string.IsNullOrEmpty(urlTemplate))
{
throw new ArgumentException("No valid ResourceURL element found in Layer \"" + layerIdentifier + "\".");
}
return urlTemplate;
}
public static WmtsTileMatrixSet ReadTileMatrixSet(XElement tileMatrixSetElement)
{
XNamespace ns = tileMatrixSetElement.Name.Namespace;