/// <summary> /// OGC WMS GetCapabilities /// </summary> /// <param name="context"></param> private void ProcessGetCapabilities(HttpResponse response, StringDictionary parameters) { //Service parameter is mandatory for GetCapabilities request if (String.IsNullOrEmpty(parameters[OgcParameters.Service])) { SetResponseToServiceException(response, OgcErrorMessages.RequiredParameter(OgcParameters.Service)); return; } if (String.Compare(parameters[OgcParameters.Service], ServiceNames.WMS.ToString()) != 0) { SetResponseToServiceException(response, "Invalid service for GetCapabilities Request. Service parameter must be 'WMS'"); return; } // deserialise template GetCapabilities document XmlSerializer deSerializer = new XmlSerializer(typeof(WMS_Capabilities), Declarations.WmsNameSpace); FileStream readStream = new FileStream(Path.Combine(HttpContext.Current.Server.MapPath("~/App_Data"), "WMSCapabilities.xml"), FileMode.Open, FileAccess.Read); WMS_Capabilities wmsCapabilities = (WMS_Capabilities)deSerializer.Deserialize(readStream); readStream.Close(); // get the map service view context ViewContext webMapContext = OgcUtilities.GetViewContext(); // add layers List <GeospatialServices.Ogc.Wms.Layer> wmsLayers = new List <GeospatialServices.Ogc.Wms.Layer>(); foreach (var layer in webMapContext.Layers) { GeospatialServices.Ogc.Wms.Layer ogcLayer = new GeospatialServices.Ogc.Wms.Layer( ); ogcLayer.Queryable = 1; ogcLayer.Name = layer.Name; ogcLayer.Title = layer.Title; ogcLayer.CRSList.Add(layer.SRS); wmsLayers.Add(ogcLayer); } wmsCapabilities.Capability.Layer.LayerList = wmsLayers; // Namespaces XmlSerializerNamespaces namespaces = new XmlSerializerNamespaces(); namespaces.Add(Declarations.WmsPrefix, Declarations.WmsNameSpace); namespaces.Add(Declarations.OgcPrefix, Declarations.OgcNameSpace); namespaces.Add(Declarations.XlinkPrefix, Declarations.XlinkNameSpace); // Serialize XmlSerializer capSerializer = new XmlSerializer(typeof(WMS_Capabilities), Declarations.WmsNameSpace); MemoryStream memoryStream = new MemoryStream(); capSerializer.Serialize(memoryStream, wmsCapabilities, namespaces); byte[] buffer = memoryStream.ToArray(); response.Clear(); response.ContentType = "text/xml"; response.OutputStream.Write(buffer, 0, buffer.Length); }
/// <summary> /// Gets the WMC Context associated with a WMS Request /// </summary> /// <param name="parameters"></param> /// <returns></returns> public ViewContext(StringDictionary parameters) { // Parse map size int width = 0; int height = 0; int.TryParse(parameters[WmsParameters.Width], out width); int.TryParse(parameters[WmsParameters.Height], out height); this.General.Window.Width = width; this.General.Window.Height = height; // Attach the Bounding Box if passed in, otherwise, it will be set to the // envelope of all layers string crs = parameters[WmsParameters.Crs]; int srid = OgcUtilities.GetSridFromCrs(crs); if (parameters[WmsParameters.Bbox] != null) { this.General.BoundingBox = new GeospatialServices.Ogc.Wmc.BoundingBox(parameters[WmsParameters.Bbox], srid); this.General.BoundingBox.SRS = crs; } SLD sldRead = null; // Get the SLD_BODY if specified if (!String.IsNullOrEmpty(parameters[WmsParameters.SldBody])) { // Namespaces XmlSerializerNamespaces namespaces = new XmlSerializerNamespaces(); namespaces.Add(Declarations.WmsPrefix, Declarations.WmsNameSpace); namespaces.Add(Declarations.SldPrefix, Declarations.SldNameSpace); namespaces.Add(Declarations.SePrefix, Declarations.SeNameSpace); namespaces.Add(Declarations.OgcPrefix, Declarations.OgcNameSpace); namespaces.Add(Declarations.XlinkPrefix, Declarations.XlinkNameSpace); using (StringReader stringReader = new StringReader(parameters[WmsParameters.SldBody])) { XmlSerializer serializer = new XmlSerializer(typeof(SLD)); sldRead = (SLD)serializer.Deserialize(stringReader); } } // Extract all layers from request string layers = ""; if (parameters[OgcParameters.Service] == GeospatialServices.Ogc.Common.ServiceNames.WFS.ToString()) { layers = parameters[WfsParameters.TypeName]; } else { layers = parameters[WmsParameters.Layers]; } if (!String.IsNullOrEmpty(layers)) { string[] requestedLayers = layers.Split(new char[] { ',' }); string[] requestedStyles = null; string styles = parameters[WmsParameters.Styles]; if (string.IsNullOrEmpty(styles)) { requestedStyles = new string[0]; } else { requestedStyles = styles.Split(new char[] { ',' }); } // get all know layers from the confguration view context document ViewContext configurationContext = OgcUtilities.GetViewContext(); // build a custom WMC document from the layers and styles in the request for (int i = 0; i < requestedLayers.Count(); i++) { // find the requested layers configuration string layerName = requestedLayers[i].Trim(); int layerIndex = configurationContext.Layers.FindIndex(delegateLayer => delegateLayer.Name == layerName); if (layerIndex != -1) { // find the style GeospatialServices.Ogc.Wmc.UserStyle sldStyle = null; string requestedStyle = string.Empty; if (requestedStyles.Count() > i) { requestedStyle = requestedStyles[i].Trim(); } if (sldRead != null) { foreach (var sldlayer in sldRead.StyledLayerDescriptor.UserLayers) { foreach (UserStyle style in sldlayer.UserStyles) { if (style.Name == requestedStyle) { sldStyle = style; requestedStyle = string.Empty; break; } } if (requestedStyle == string.Empty) { break; } } } else { if (string.IsNullOrEmpty(requestedStyle)) { requestedStyle = "default"; } Style style = configurationContext.Layers[layerIndex].StyleList.Find(delegateStyle => delegateStyle.Name == requestedStyle); if (style == null) { throw new InvalidDataException("Style not found"); } sldStyle = style.SLD.StyledLayerDescriptor.UserLayers[0].UserStyles[0]; } // get the layer and remove configured styles GeospatialServices.Ogc.Wmc.Layer wmcLayer = configurationContext.Layers[layerIndex].Clone(); wmcLayer.StyleList.Clear(); // now add the style to be rendered if (sldStyle != null) { wmcLayer.StyleList.Add(new GeospatialServices.Ogc.Wmc.Style()); wmcLayer.StyleList[0].Current = 1; UserLayer ul = new UserLayer(); ul.UserStyles = new List <UserStyle>(); wmcLayer.StyleList[0].SLD.StyledLayerDescriptor.UserLayers.Add(ul); wmcLayer.StyleList[0].SLD.StyledLayerDescriptor.UserLayers[0].UserStyles.Add(sldStyle); } if (parameters[WmsParameters.Format] != null) { wmcLayer.FormatList.Add(new Format(parameters[WmsParameters.Format], 1)); } this.Layers.Add(wmcLayer); } } //TODO: do this properly.... // compute envelope if required if (this.General.BoundingBox.ToSqlGeometry == null) { this.General.BoundingBox = new BoundingBox("-180,-85,180,85", 4326); } } }