/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
public static void ParseQueryString(SharpMap.Map map, Capabilities.WmsServiceDescription description)
{
if (map == null)
throw (new ArgumentException("Map for WMS is null"));
if (map.Layers.Count == 0)
throw (new ArgumentException("Map doesn't contain any layers for WMS service"));
if (System.Web.HttpContext.Current == null)
throw (new ApplicationException("An attempt was made to access the WMS server outside a valid HttpContext"));
System.Web.HttpContext context = System.Web.HttpContext.Current;
//IgnoreCase value should be set according to the VERSION parameter
//v1.3.0 is case sensitive, but since it causes a lot of problems with several WMS clients, we ignore casing anyway.
bool ignorecase = true;
//Check for required parameters
//Request parameter is mandatory
if (context.Request.Params["REQUEST"] == null)
{ WmsException.ThrowWmsException("Required parameter REQUEST not specified"); return; }
//Check if version is supported
if (context.Request.Params["VERSION"] != null)
{
if (String.Compare(context.Request.Params["VERSION"], "1.3.0", ignorecase) != 0)
{ WmsException.ThrowWmsException("Only version 1.3.0 supported"); return; }
}
else //Version is mandatory if REQUEST!=GetCapabilities. Check if this is a capabilities request, since VERSION is null
{
if (String.Compare(context.Request.Params["REQUEST"], "GetCapabilities", ignorecase) != 0)
{ WmsException.ThrowWmsException("VERSION parameter not supplied"); return; }
}
//If Capabilities was requested
if (String.Compare(context.Request.Params["REQUEST"], "GetCapabilities", ignorecase) == 0)
{
GetCapabilities(map, ref description, context);
}
else if (String.Compare(context.Request.Params["REQUEST"], "GetMap", ignorecase) == 0) //Map requested
{
GetMap(map, ref description, context, ignorecase);
}
else if (String.Compare(context.Request.Params["REQUEST"], "getfeatureinfo", ignorecase) == 0) //Map requested
{
GetFeatureInfo(map, context);
}
else
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Invalid request");
}
/// <summary>
/// Generates a capabilities file from a map object for use in WMS services
/// </summary>
/// <remarks>The capabilities document uses the v1.3.0 OpenGIS WMS specification</remarks>
/// <param name="map">The map to create capabilities for</param>
/// <param name="serviceDescription">Additional description of WMS</param>
/// <returns>Returns XmlDocument describing capabilities</returns>
public static XmlDocument GetCapabilities(Map map, Capabilities.WmsServiceDescription serviceDescription)
{
XmlDocument capabilities = new XmlDocument();
//Set XMLSchema
//capabilities.Schemas.Add(GetCapabilitiesSchema());
//Instantiate an XmlNamespaceManager object.
//System.Xml.XmlNamespaceManager xmlnsManager = new System.Xml.XmlNamespaceManager(capabilities.NameTable);
//xmlnsManager.AddNamespace(xlinkNamespaceURI, "urn:Books");
//Insert XML tag
capabilities.InsertBefore(capabilities.CreateXmlDeclaration("1.0", "UTF-8", string.Empty),
capabilities.DocumentElement);
capabilities.AppendChild(
capabilities.CreateComment("Capabilities generated by SharpMap v. " +
Assembly.GetExecutingAssembly().GetName().Version));
//Create root node
XmlNode RootNode = capabilities.CreateNode(XmlNodeType.Element, "WMS_Capabilities", wmsNamespaceURI);
RootNode.Attributes.Append(CreateAttribute("version", "1.3.0", capabilities));
XmlAttribute attr = capabilities.CreateAttribute("xmlns", "xsi", "http://www.w3.org/2000/xmlns/");
attr.InnerText = "http://www.w3.org/2001/XMLSchema-instance";
RootNode.Attributes.Append(attr);
RootNode.Attributes.Append(CreateAttribute("xmlns:xlink", xlinkNamespaceURI, capabilities));
XmlAttribute attr2 = capabilities.CreateAttribute("xsi", "schemaLocation",
"http://www.w3.org/2001/XMLSchema-instance");
attr2.InnerText = "http://schemas.opengis.net/wms/1.3.0/capabilities_1_3_0.xsd";
RootNode.Attributes.Append(attr2);
//Build Service node
RootNode.AppendChild(GenerateServiceNode(ref serviceDescription, capabilities));
//Build Capability node
RootNode.AppendChild(GenerateCapabilityNode(map, capabilities, serviceDescription.PublicAccessURL));
capabilities.AppendChild(RootNode);
//TODO: Validate output against schema
return capabilities;
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
/// <param name="intersectDelegate">Delegate for Getfeatureinfo intersecting, when null, the WMS will default to ICanQueryLayer implementation</param>
public static void ParseQueryString(Map map, Capabilities.WmsServiceDescription description, int pixelSensitivity, InterSectDelegate intersectDelegate)
{
_intersectDelegate = intersectDelegate;
if (pixelSensitivity > 0)
_pixelSensitivity = pixelSensitivity;
ParseQueryString(map, description);
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
public static void ParseQueryString(Map map, Capabilities.WmsServiceDescription description)
{
if (_pixelSensitivity ==-1)
_pixelSensitivity = 1;
if (map == null)
throw (new ArgumentException("Map for WMS is null"));
if (map.Layers.Count == 0)
throw (new ArgumentException("Map doesn't contain any layers for WMS service"));
if (HttpContext.Current == null)
throw (new ApplicationException(
"An attempt was made to access the WMS server outside a valid HttpContext"));
HttpContext context = HttpContext.Current;
//IgnoreCase value should be set according to the VERSION parameter
//v1.3.0 is case sensitive, but since it causes a lot of problems with several WMS clients, we ignore casing anyway.
bool ignorecase = true;
//Check for required parameters
//Request parameter is mandatory
if (context.Request.Params["REQUEST"] == null)
{
WmsException.ThrowWmsException("Required parameter REQUEST not specified");
return;
}
//Check if version is supported
if (context.Request.Params["VERSION"] != null)
{
if (String.Compare(context.Request.Params["VERSION"], "1.3.0", ignorecase) != 0)
{
WmsException.ThrowWmsException("Only version 1.3.0 supported");
return;
}
}
else
//Version is mandatory if REQUEST!=GetCapabilities. Check if this is a capabilities request, since VERSION is null
{
if (String.Compare(context.Request.Params["REQUEST"], "GetCapabilities", ignorecase) != 0)
{
WmsException.ThrowWmsException("VERSION parameter not supplied");
return;
}
}
//If Capabilities was requested
if (String.Compare(context.Request.Params["REQUEST"], "GetCapabilities", ignorecase) == 0)
{
//Service parameter is mandatory for GetCapabilities request
if (context.Request.Params["SERVICE"] == null)
{
WmsException.ThrowWmsException("Required parameter SERVICE not specified");
return;
}
if (String.Compare(context.Request.Params["SERVICE"], "WMS") != 0)
WmsException.ThrowWmsException(
"Invalid service for GetCapabilities Request. Service parameter must be 'WMS'");
XmlDocument capabilities = Capabilities.GetCapabilities(map, description);
context.Response.Clear();
context.Response.ContentType = "text/xml";
XmlWriter writer = XmlWriter.Create(context.Response.OutputStream);
capabilities.WriteTo(writer);
writer.Close();
context.Response.End();
}
else if (String.Compare(context.Request.Params["REQUEST"], "GetFeatureInfo", ignorecase) == 0) //FeatureInfo Requested
{
if (context.Request.Params["LAYERS"] == null)
{
WmsException.ThrowWmsException("Required parameter LAYERS not specified");
return;
}
if (context.Request.Params["STYLES"] == null)
{
WmsException.ThrowWmsException("Required parameter STYLES not specified");
return;
}
if (context.Request.Params["CRS"] == null)
{
WmsException.ThrowWmsException("Required parameter CRS not specified");
return;
}
else if (context.Request.Params["CRS"] != "EPSG:" + map.Layers[0].TargetSRID)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidCRS, "CRS not supported");
return;
}
if (context.Request.Params["BBOX"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter BBOX not specified");
return;
}
if (context.Request.Params["WIDTH"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter WIDTH not specified");
return;
}
if (context.Request.Params["HEIGHT"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter HEIGHT not specified");
return;
}
if (context.Request.Params["FORMAT"] == null)
{
WmsException.ThrowWmsException("Required parameter FORMAT not specified");
return;
}
if (context.Request.Params["QUERY_LAYERS"] == null)
{
WmsException.ThrowWmsException("Required parameter QUERY_LAYERS not specified");
return;
}
if (context.Request.Params["INFO_FORMAT"] == null)
{
WmsException.ThrowWmsException("Required parameter INFO_FORMAT not specified");
return;
}
//parameters X&Y are not part of the 1.3.0 specification, but are included for backwards compatability with 1.1.1 (OpenLayers likes it when used together with wms1.1.1 services)
if (context.Request.Params["X"] == null && context.Request.Params["I"] == null)
{
WmsException.ThrowWmsException("Required parameter I not specified");
return;
}
if (context.Request.Params["Y"] == null && context.Request.Params["J"] == null)
{
WmsException.ThrowWmsException("Required parameter J not specified");
return;
}
//sets the map size to the size of the client in order to calculate the coordinates of the projection of the client
try
{
map.Size = new System.Drawing.Size(System.Convert.ToInt16(context.Request.Params["WIDTH"]), System.Convert.ToInt16(context.Request.Params["HEIGHT"]));
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for HEIGHT or WITDH");
return;
}
//sets the boundingbox to the boundingbox of the client in order to calculate the coordinates of the projection of the client
BoundingBox bbox = ParseBBOX(context.Request.Params["bbox"]);
if (bbox == null)
{
WmsException.ThrowWmsException("Invalid parameter BBOX");
return;
}
map.ZoomToBox(bbox);
//sets the point clicked by the client
SharpMap.Geometries.Point p = new SharpMap.Geometries.Point();
Single x = 0;
Single y = 0;
//tries to set the x to the Param I, if the client send an X, it will try the X, if both fail, exception is thrown
if (context.Request.Params["X"] != null)
try
{
x = System.Convert.ToSingle(context.Request.Params["X"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for I");
}
if (context.Request.Params["I"] != null)
try
{
x = System.Convert.ToSingle(context.Request.Params["I"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for I");
}
//same procedure for J (Y)
if (context.Request.Params["Y"] != null)
try
{
y = System.Convert.ToSingle(context.Request.Params["Y"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for I");
}
if (context.Request.Params["J"] != null)
try
{
y = System.Convert.ToSingle(context.Request.Params["J"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for I");
}
p = map.ImageToWorld(new System.Drawing.PointF(x, y));
int fc;
try
{
fc = System.Convert.ToInt16(context.Request.Params["FEATURE_COUNT"]);
if (fc < 1)
fc = 1;
}
catch
{
fc = 1;
}
//default to text if an invalid format is requested
string infoFormat = context.Request.Params["INFO_FORMAT"];
string cqlFilter = null;
if (context.Request.Params["CQL_FILTER"] != null)
{
cqlFilter = context.Request.Params["CQL_FILTER"];
}
string vstr = "";
string[] requestLayers = context.Request.Params["QUERY_LAYERS"].Split(new[] { ',' });
if (String.Compare(context.Request.Params["INFO_FORMAT"], "text/json", ignorecase) == 0)
{
vstr = CreateFeatureInfoGeoJSON(map, requestLayers, x, y, fc, cqlFilter);
context.Response.ContentType = "text/json";
}
else
{
vstr = CreateFeatureInfoPlain(map, requestLayers, x, y, fc, cqlFilter);
context.Response.ContentType = "text/plain";
}
context.Response.Clear();
context.Response.Charset = "windows-1252";
context.Response.Write(vstr);
context.Response.Flush();
context.Response.End();
}
else if (String.Compare(context.Request.Params["REQUEST"], "GetMap", ignorecase) == 0) //Map requested
{
//Check for required parameters
if (context.Request.Params["LAYERS"] == null)
{
WmsException.ThrowWmsException("Required parameter LAYERS not specified");
return;
}
if (context.Request.Params["STYLES"] == null)
{
WmsException.ThrowWmsException("Required parameter STYLES not specified");
return;
}
if (context.Request.Params["CRS"] == null)
{
WmsException.ThrowWmsException("Required parameter CRS not specified");
return;
}
else if (context.Request.Params["CRS"] != "EPSG:" + map.Layers[0].TargetSRID)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidCRS, "CRS not supported");
return;
}
if (context.Request.Params["BBOX"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter BBOX not specified");
return;
}
if (context.Request.Params["WIDTH"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter WIDTH not specified");
return;
}
if (context.Request.Params["HEIGHT"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter HEIGHT not specified");
return;
}
if (context.Request.Params["FORMAT"] == null)
{
WmsException.ThrowWmsException("Required parameter FORMAT not specified");
return;
}
//Set background color of map
if (String.Compare(context.Request.Params["TRANSPARENT"], "TRUE", ignorecase) == 0)
map.BackColor = Color.Transparent;
else if (context.Request.Params["BGCOLOR"] != null)
{
try
{
map.BackColor = ColorTranslator.FromHtml(context.Request.Params["BGCOLOR"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameter BGCOLOR");
return;
}
;
}
else
map.BackColor = Color.White;
//Get the image format requested
ImageCodecInfo imageEncoder = GetEncoderInfo(context.Request.Params["FORMAT"]);
if (imageEncoder == null)
{
WmsException.ThrowWmsException("Invalid MimeType specified in FORMAT parameter");
return;
}
//Parse map size
int width = 0;
int height = 0;
if (!int.TryParse(context.Request.Params["WIDTH"], out width))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Invalid parameter WIDTH");
return;
}
else if (description.MaxWidth > 0 && width > description.MaxWidth)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Parameter WIDTH too large");
return;
}
if (!int.TryParse(context.Request.Params["HEIGHT"], out height))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Invalid parameter HEIGHT");
return;
}
else if (description.MaxHeight > 0 && height > description.MaxHeight)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Parameter HEIGHT too large");
return;
}
map.Size = new Size(width, height);
BoundingBox bbox = ParseBBOX(context.Request.Params["bbox"]);
if (bbox == null)
{
WmsException.ThrowWmsException("Invalid parameter BBOX");
return;
}
map.PixelAspectRatio = (width / (double)height) / (bbox.Width / bbox.Height);
map.Center = bbox.GetCentroid();
map.Zoom = bbox.Width;
//set Styles for layers
//first, if the request == STYLES=, set all the vectorlayers with Themes not null the Theme to the first theme from Themes
if (String.IsNullOrEmpty(context.Request.Params["STYLES"]))
{
foreach (ILayer layer in map.Layers)
{
if (layer.GetType() == typeof(VectorLayer))
{
if ((layer as VectorLayer).Themes != null)
{
if ((layer as VectorLayer).Themes.Count > 0)
{
foreach (KeyValuePair<string, SharpMap.Rendering.Thematics.ITheme> kvp in (layer as VectorLayer).Themes)
{
(layer as VectorLayer).Theme = kvp.Value;
break;
}
}
}
}
}
}
else
{
if (!String.IsNullOrEmpty(context.Request.Params["LAYERS"]))
{
string[] layerz = context.Request.Params["LAYERS"].Split(new[] { ',' });
string[] styles = context.Request.Params["STYLES"].Split(new[] { ',' });
//test whether the lengt of the layers and the styles is the same. WMS spec is unclear on what to do if there is no one-to-one correspondence
if (layerz.Length == styles.Length)
{
foreach (ILayer layer in map.Layers)
{
if (layer.GetType() == typeof(VectorLayer))
{
if ((layer as VectorLayer).Themes != null)
{
if ((layer as VectorLayer).Themes.Count > 0)
{
for (int i = 0; i < layerz.Length; i++)
{
if (String.Equals(layer.LayerName, layerz[i], StringComparison.InvariantCultureIgnoreCase))
{
//take default style if style is empty
if (styles[i] =="")
{
foreach (KeyValuePair<string, SharpMap.Rendering.Thematics.ITheme> kvp in (layer as VectorLayer).Themes)
{
(layer as VectorLayer).Theme = kvp.Value;
break;
}
}
else
{
if ((layer as VectorLayer).Themes.ContainsKey(styles[i]))
{
(layer as VectorLayer).Theme = (layer as VectorLayer).Themes[styles[i]];
}
else
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.StyleNotDefined, "Style not advertised for this layer");
}
}
}
}
}
}
}
}
}
}
}
if (context.Request.Params["CQL_FILTER"] != null)
{
foreach (ILayer layer in map.Layers)
{
if (layer.GetType() == typeof(VectorLayer))
{
if (typeof(SharpMap.Data.Providers.FilterProvider).IsAssignableFrom((layer as VectorLayer).DataSource.GetType()))
{
SharpMap.Data.Providers.FilterProvider shape = (SharpMap.Data.Providers.FilterProvider)(layer as VectorLayer).DataSource;
shape.FilterDelegate = new Data.Providers.FilterProvider.FilterMethod(delegate(SharpMap.Data.FeatureDataRow row) { return CQLFilter(row, context.Request.Params["CQL_FILTER"]); });
}
}
else if(layer.GetType() == typeof(LabelLayer))
{
if (typeof(SharpMap.Data.Providers.FilterProvider).IsAssignableFrom((layer as VectorLayer).DataSource.GetType()))
{
SharpMap.Data.Providers.FilterProvider shape = (SharpMap.Data.Providers.FilterProvider)(layer as VectorLayer).DataSource;
shape.FilterDelegate = new Data.Providers.FilterProvider.FilterMethod(delegate(SharpMap.Data.FeatureDataRow row) { return CQLFilter(row, context.Request.Params["CQL_FILTER"]); });
}
}
}
}
//Set layers on/off
if (!String.IsNullOrEmpty(context.Request.Params["LAYERS"]))
//If LAYERS is empty, use default layer on/off settings
{
string[] layers = context.Request.Params["LAYERS"].Split(new[] { ',' });
if (description.LayerLimit > 0)
{
if (layers.Length == 0 && map.Layers.Count > description.LayerLimit ||
layers.Length > description.LayerLimit)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Too many layers requested");
return;
}
}
foreach (ILayer layer in map.Layers)
layer.Enabled = false;
foreach (string layer in layers)
{
//SharpMap.Layers.ILayer lay = map.Layers.Find(delegate(SharpMap.Layers.ILayer findlay) { return findlay.LayerName == layer; });
ILayer lay = null;
for (int i = 0; i < map.Layers.Count; i++)
if (String.Equals(map.Layers[i].LayerName, layer,
StringComparison.InvariantCultureIgnoreCase))
lay = map.Layers[i];
if (lay == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.LayerNotDefined,
"Unknown layer '" + layer + "'");
return;
}
else
lay.Enabled = true;
}
}
//Render map
Image img = map.GetMap();
//Png can't stream directy. Going through a memorystream instead
MemoryStream MS = new MemoryStream();
img.Save(MS, imageEncoder, null);
img.Dispose();
byte[] buffer = MS.ToArray();
context.Response.Clear();
context.Response.ContentType = imageEncoder.MimeType;
context.Response.OutputStream.Write(buffer, 0, buffer.Length);
//context.Response.End();
}
else
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Invalid request");
}
/// <summary>
///
/// </summary>
/// <param name="map"></param>
/// <param name="description"></param>
/// <param name="context"></param>
/// <param name="ignorecase"></param>
private static void GetMap(SharpMap.Map map, ref Capabilities.WmsServiceDescription description, System.Web.HttpContext context, bool ignorecase)
{
string QueryString = context.Request.QueryString.ToString();
System.Diagnostics.Debug.WriteLine(context.Request.QueryString);
if (RequestIsCached(QueryString))
{
SendCachedData(context);
}
else
{
bool MapIsStatic = true;
//Check for required parameters
if (context.Request.Params["LAYERS"] == null)
{ WmsException.ThrowWmsException("Required parameter LAYERS not specified"); return; }
if (context.Request.Params["STYLES"] == null)
{ WmsException.ThrowWmsException("Required parameter STYLES not specified"); return; }
if (context.Request.Params["CRS"] == null)
{ WmsException.ThrowWmsException("Required parameter CRS not specified"); return; }
else if (context.Request.Params["CRS"] != "EPSG:" + map.Layers[0].SRID.ToString())
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidCRS, "CRS not supported"); return; }
if (context.Request.Params["BBOX"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter BBOX not specified"); return; }
if (context.Request.Params["WIDTH"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter WIDTH not specified"); return; }
if (context.Request.Params["HEIGHT"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter HEIGHT not specified"); return; }
if (context.Request.Params["FORMAT"] == null)
{ WmsException.ThrowWmsException("Required parameter FORMAT not specified"); return; }
//Set background color of map
if (String.Compare(context.Request.Params["TRANSPARENT"], "TRUE", ignorecase) == 0)
map.BackColor = System.Drawing.Color.Transparent;
else if (context.Request.Params["BGCOLOR"] != null)
{
try { map.BackColor = System.Drawing.ColorTranslator.FromHtml(context.Request.Params["BGCOLOR"]); }
catch { WmsException.ThrowWmsException("Invalid parameter BGCOLOR"); return; };
}
else
map.BackColor = System.Drawing.Color.White;
//Get the image format requested
System.Drawing.Imaging.ImageCodecInfo imageEncoder = GetEncoderInfo(context.Request.Params["FORMAT"]);
if (imageEncoder == null)
{
WmsException.ThrowWmsException("Invalid MimeType specified in FORMAT parameter");
return;
}
//Parse map size
int width = 0;
int height = 0;
if (!int.TryParse(context.Request.Params["WIDTH"], out width))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Invalid parameter WIDTH");
return;
}
else if (description.MaxWidth > 0 && width > description.MaxWidth)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Parameter WIDTH too large");
return;
}
if (!int.TryParse(context.Request.Params["HEIGHT"], out height))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Invalid parameter HEIGHT");
return;
}
else if (description.MaxHeight > 0 && height > description.MaxHeight)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Parameter HEIGHT too large");
return;
}
map.Size = new System.Drawing.Size(width, height);
SharpMap.Geometries.BoundingBox bbox = ParseBBOX(context.Request.Params["bbox"]);
if (bbox == null)
{
WmsException.ThrowWmsException("Invalid parameter BBOX");
return;
}
map.PixelAspectRatio = ((double)width / (double)height) / (bbox.Width / bbox.Height);
map.Center = bbox.GetCentroid();
map.Zoom = bbox.Width;
//Set layers on/off
if (context.Request.Params["LAYERS"] != "") //If LAYERS is empty, use default layer on/off settings
{
string[] layers = context.Request.Params["LAYERS"].Split(new char[] { ',' });
if (description.LayerLimit > 0)
{
if (layers.Length == 0 && map.Layers.Count > description.LayerLimit ||
layers.Length > description.LayerLimit)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Too many layers requested");
return;
}
}
foreach (SharpMap.Layers.ILayer layer in map.Layers)
layer.Enabled = false;
foreach (string layer in layers)
{
SharpMap.Layers.ILayer lay = map.Layers.Find(delegate(SharpMap.Layers.ILayer findlay) { return findlay.LayerName == layer; });
if (lay == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.LayerNotDefined, "Unknown layer '" + layer + "'");
return;
}
else
{
lay.Enabled = true;
if (lay is SharpMap.Layers.VectorLayer)
{
if (!((lay as SharpMap.Layers.VectorLayer).DataSource is SharpMap.Data.Providers.ShapeFile))
{
MapIsStatic = false;
}
}
}
}
}
//Render map
System.Drawing.Image img = map.GetMap();
//Png can't stream directy. Going through a memorystream instead
System.IO.MemoryStream MS = new System.IO.MemoryStream();
img.Save(MS, imageEncoder, null);
img.Dispose();
byte[] buffer = MS.ToArray();
context.Response.Clear();
context.Response.ContentType = imageEncoder.MimeType;
context.Response.OutputStream.Write(buffer, 0, buffer.Length);
if (MapIsStatic)
SaveCachedData(QueryString, imageEncoder.MimeType, buffer);
context.Response.End();
}
}
/// <summary>
///
/// </summary>
/// <param name="map"></param>
/// <param name="description"></param>
/// <param name="context"></param>
private static void GetCapabilities(SharpMap.Map map, ref Capabilities.WmsServiceDescription description, System.Web.HttpContext context)
{
//Service parameter is mandatory for GetCapabilities request
if (context.Request.Params["SERVICE"] == null)
{ WmsException.ThrowWmsException("Required parameter SERVICE not specified"); return; }
if (String.Compare(context.Request.Params["SERVICE"], "WMS") != 0)
WmsException.ThrowWmsException("Invalid service for GetCapabilities Request. Service parameter must be 'WMS'");
System.Xml.XmlDocument capabilities = Wms.Capabilities.GetCapabilities(map, description);
context.Response.Clear();
context.Response.ContentType = "text/xml";
System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(context.Response.OutputStream);
capabilities.WriteTo(writer);
writer.Close();
context.Response.End();
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
///<param name="pixelSensitivity"> </param>
///<param name="intersectDelegate">Delegate for Getfeatureinfo intersecting, when null, the WMS will default to ICanQueryLayer implementation</param>
public static void ParseQueryString(Map map, Capabilities.WmsServiceDescription description, int pixelSensitivity, InterSectDelegate intersectDelegate)
{
IntersectDelegate = intersectDelegate;
if (pixelSensitivity > 0)
PixelSensitivity = pixelSensitivity;
ParseQueryString(map, description, new Context(HttpContext.Current));
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
/// <param name="context">The context the <see cref="WmsServer"/> is running in.</param>
public static void ParseQueryString(Map map, Capabilities.WmsServiceDescription description, IContext context)
{
const StringComparison @case = StringComparison.InvariantCultureIgnoreCase;
IContextRequest request = context.Request;
IContextResponse response = context.Response;
try
{
if (PixelSensitivity < 0)
PixelSensitivity = 1;
if (map == null)
throw new WmsArgumentException("Map for WMS is null");
if (map.Layers.Count == 0)
throw new WmsArgumentException("Map doesn't contain any layers for WMS service");
string req = request.GetParam("REQUEST");
if (req == null)
throw new WmsParameterNotSpecifiedException("REQUEST");
IHandler handler;
if (String.Equals(req, "GetCapabilities", @case))
handler = new GetCapabilities(description);
else if (String.Equals(req, "GetFeatureInfo", @case))
{
// use text/plain as default handler
// let the default handler validate params
string format = request.GetParam("INFO_FORMAT") ?? String.Empty;
GetFeatureInfoParams @params = new GetFeatureInfoParams(PixelSensitivity,
IntersectDelegate, FeatureInfoResponseEncoding);
if (String.Equals(format, "text/json", @case))
handler = new GetFeatureInfoJson(description, @params);
else if (String.Equals(format, "text/html", @case))
handler = new GetFeatureInfoHtml(description, @params);
else handler = new GetFeatureInfoPlain(description, @params);
}
else if (String.Equals(req, "GetMap", @case))
handler = new GetMap(description);
else
{
string s = String.Format("Invalid request: {0}", req);
throw new WmsOperationNotSupportedException(s);
}
IHandlerResponse result = handler.Handle(map, request);
result.WriteToContextAndFlush(response);
}
catch (WmsExceptionBase ex)
{
ex.WriteToContextAndFlush(response);
}
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
public static void ParseQueryString(SharpMap.Map map, Capabilities.WmsServiceDescription description)
{
if (map == null)
throw (new ArgumentException("Map for WMS is null"));
if (map.Layers.Count == 0)
throw (new ArgumentException("Map doesn't contain any layers for WMS service"));
if (System.Web.HttpContext.Current == null)
throw (new ApplicationException("An attempt was made to access the WMS server outside a valid HttpContext"));
System.Web.HttpContext context = System.Web.HttpContext.Current;
//IgnoreCase value should be set according to the VERSION parameter
//v1.3.0 is case sensitive, but since it causes a lot of problems with several WMS clients, we ignore casing anyway.
bool ignorecase = true;
//Check for required parameters
//Request parameter is mandatory
if (context.Request.Params["REQUEST"] == null)
{ WmsException.ThrowWmsException("Required parameter REQUEST not specified"); return; }
//Check if version is supported
if (context.Request.Params["VERSION"] != null)
{
if (String.Compare(context.Request.Params["VERSION"], "1.3.0", ignorecase) != 0)
{ WmsException.ThrowWmsException("Only version 1.3.0 supported"); return; }
}
else //Version is mandatory if REQUEST!=GetCapabilities. Check if this is a capabilities request, since VERSION is null
{
if (String.Compare(context.Request.Params["REQUEST"], "GetCapabilities", ignorecase) != 0)
{ WmsException.ThrowWmsException("VERSION parameter not supplied"); return; }
}
//If Capabilities was requested
if (String.Compare(context.Request.Params["REQUEST"], "GetCapabilities", ignorecase) == 0)
{
//Service parameter is mandatory for GetCapabilities request
if (context.Request.Params["SERVICE"] == null)
{ WmsException.ThrowWmsException("Required parameter SERVICE not specified"); return; }
if (String.Compare(context.Request.Params["SERVICE"], "WMS") != 0)
WmsException.ThrowWmsException("Invalid service for GetCapabilities Request. Service parameter must be 'WMS'");
System.Xml.XmlDocument capabilities = Wms.Capabilities.GetCapabilities(map, description);
context.Response.Clear();
context.Response.ContentType = "text/xml";
System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(context.Response.OutputStream);
capabilities.WriteTo(writer);
writer.Close();
context.Response.End();
}
else if (String.Compare(context.Request.Params["REQUEST"], "GetMap", ignorecase) == 0) //Map requested
{
//Check for required parameters
if (context.Request.Params["LAYERS"] == null)
{ WmsException.ThrowWmsException("Required parameter LAYERS not specified"); return; }
if (context.Request.Params["STYLES"] == null)
{ WmsException.ThrowWmsException("Required parameter STYLES not specified"); return; }
if (context.Request.Params["CRS"] == null)
{ WmsException.ThrowWmsException("Required parameter CRS not specified"); return; }
else if (context.Request.Params["CRS"] != "EPSG:" + map.Layers[0].SRID.ToString())
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidCRS, "CRS not supported"); return; }
if (context.Request.Params["BBOX"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter BBOX not specified"); return; }
if (context.Request.Params["WIDTH"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter WIDTH not specified"); return; }
if (context.Request.Params["HEIGHT"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter HEIGHT not specified"); return; }
if (context.Request.Params["FORMAT"] == null)
{ WmsException.ThrowWmsException("Required parameter FORMAT not specified"); return; }
//Set background color of map
if (String.Compare(context.Request.Params["TRANSPARENT"], "TRUE", ignorecase) == 0)
map.BackColor = System.Drawing.Color.Transparent;
else if (context.Request.Params["BGCOLOR"] != null)
{
try { map.BackColor = System.Drawing.ColorTranslator.FromHtml(context.Request.Params["BGCOLOR"]); }
catch { WmsException.ThrowWmsException("Invalid parameter BGCOLOR"); return; };
}
else
map.BackColor = System.Drawing.Color.White;
//Get the image format requested
System.Drawing.Imaging.ImageCodecInfo imageEncoder = GetEncoderInfo(context.Request.Params["FORMAT"]);
if (imageEncoder == null)
{
WmsException.ThrowWmsException("Invalid MimeType specified in FORMAT parameter");
return;
}
//Parse map size
int width = 0;
int height = 0;
if (!int.TryParse(context.Request.Params["WIDTH"], out width))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Invalid parameter WIDTH");
return;
}
else if (description.MaxWidth > 0 && width > description.MaxWidth)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Parameter WIDTH too large");
return;
}
if (!int.TryParse(context.Request.Params["HEIGHT"], out height))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Invalid parameter HEIGHT");
return;
}
else if (description.MaxHeight > 0 && height > description.MaxHeight)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Parameter HEIGHT too large");
return;
}
map.Size = new System.Drawing.Size(width, height);
IEnvelope bbox = ParseBBOX(context.Request.Params["bbox"]);
if (bbox == null)
{
WmsException.ThrowWmsException("Invalid parameter BBOX");
return;
}
map.PixelAspectRatio = ((double)width / (double)height) / (bbox.Width / bbox.Height);
map.Center = bbox.Centre;
map.Zoom = bbox.Width;
//Set layers on/off
if (!String.IsNullOrEmpty(context.Request.Params["LAYERS"])) //If LAYERS is empty, use default layer on/off settings
{
string[] layers = context.Request.Params["LAYERS"].Split(new char[] { ',' });
if(description.LayerLimit>0)
{
if (layers.Length == 0 && map.Layers.Count > description.LayerLimit ||
layers.Length > description.LayerLimit)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Too many layers requested");
return;
}
}
foreach (SharpMap.Layers.ILayer layer in map.Layers)
layer.Enabled = false;
foreach (string layer in layers)
{
//SharpMap.Layers.ILayer lay = map.Layers.Find(delegate(SharpMap.Layers.ILayer findlay) { return findlay.LayerName == layer; });
SharpMap.Layers.ILayer lay = null;
for (int i = 0; i < map.Layers.Count; i++)
if (String.Equals(map.Layers[i].Name, layer, StringComparison.InvariantCultureIgnoreCase))
lay = map.Layers[i];
if (lay == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.LayerNotDefined, "Unknown layer '" + layer + "'");
return;
}
else
lay.Enabled = true;
}
}
//Render map
System.Drawing.Image img = map.Render();
//Png can't stream directy. Going through a memorystream instead
System.IO.MemoryStream MS = new System.IO.MemoryStream();
img.Save(MS, imageEncoder, null);
img.Dispose();
byte[] buffer = MS.ToArray();
context.Response.Clear();
context.Response.ContentType = imageEncoder.MimeType;
context.Response.OutputStream.Write(buffer, 0, buffer.Length);
context.Response.End();
}
else
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Invalid request");
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
public static void ParseQueryString(Map map, Capabilities.WmsServiceDescription description)
{
ParseQueryString(map, description, 1, null);
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected].
/// High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
///<param name="pixelSensitivity">Tolerance for GetFeatureInfo requests</param>
///<param name="intersectDelegate">Delegate for Getfeatureinfo intersecting, when null, the WMS will default to ICanQueryLayer implementation</param>
public static void ParseQueryString(Map map, Capabilities.WmsServiceDescription description, int pixelSensitivity, InterSectDelegate intersectDelegate)
{
_pixelSensitivity = pixelSensitivity;
_intersectDelegate = intersectDelegate;
if (map == null)
throw (new ArgumentException("Map for WMS is null"));
if (map.Layers.Count == 0)
throw (new ArgumentException("Map doesn't contain any layers for WMS service"));
if (HttpContext.Current == null)
throw new ApplicationException("An attempt was made to access the WMS server outside a valid HttpContext");
HttpContext context = HttpContext.Current;
//IgnoreCase value should be set according to the VERSION parameter
//v1.3.0 is case sensitive, but since it causes a lot of problems with several WMS clients, we ignore casing anyway.
const bool ignorecase = true;
//Collect parameters
string request = context.Request.Params["REQUEST"];
string version = context.Request.Params["VERSION"];
//Check for required parameters
//Request parameter is mandatory
if (request == null)
{
WmsException.ThrowWmsException("Required parameter REQUEST not specified");
return;
}
//Check if version is supported
if (version != null)
{
if (String.Compare(version, "1.3.0", ignorecase) != 0)
{
WmsException.ThrowWmsException("Only version 1.3.0 supported");
return;
}
}
else
{
//Version is mandatory if REQUEST!=GetCapabilities. Check if this is a capabilities request, since VERSION is null
if (String.Compare(request, "GetCapabilities", ignorecase) != 0)
{
WmsException.ThrowWmsException("VERSION parameter not supplied");
return;
}
}
HandlerParams @params = new HandlerParams(context, map, description, ignorecase);
GetFeatureInfoParams infoParams = new GetFeatureInfoParams(_pixelSensitivity, _intersectDelegate);
IWmsHandler handler = null;
if (String.Compare(request, "GetCapabilities", ignorecase) == 0)
handler = new GetCapabilities(@params);
else if (String.Compare(request, "GetFeatureInfo", ignorecase) == 0)
handler = new GetFeatureInfo(@params, infoParams);
else if (String.Compare(request, "GetMap", ignorecase) == 0)
handler = new GetMap(@params);
if (handler == null)
{
WmsException.ThrowWmsException(
WmsException.WmsExceptionCode.OperationNotSupported, String.Format("Invalid request: {0}", request));
}
else handler.Handle();
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
public static void ParseQueryString(Map map, Capabilities.WmsServiceDescription description)
{
if (HttpContext.Current == null)
throw (new ApplicationException(
"An attempt was made to access the WMS server outside a valid HttpContext"));
ParseQueryString(map, description, HttpContext.Current);
}
/// <summary>
/// Generates a WMS 1.3.0 compliant response based on a <see cref="SharpMap.Map"/> and the current HttpRequest.
/// </summary>
/// <remarks>
/// <para>
/// The Web Map Server implementation in SharpMap requires v1.3.0 compatible clients,
/// and support the basic operations "GetCapabilities" and "GetMap"
/// as required by the WMS v1.3.0 specification. SharpMap does not support the optional
/// GetFeatureInfo operation for querying.
/// </para>
/// <example>
/// Creating a WMS server in ASP.NET is very simple using the classes in the SharpMap.Web.Wms namespace.
/// <code lang="C#">
/// void page_load(object o, EventArgs e)
/// {
/// //Get the path of this page
/// string url = (Request.Url.Query.Length>0?Request.Url.AbsoluteUri.Replace(Request.Url.Query,""):Request.Url.AbsoluteUri);
/// SharpMap.Web.Wms.Capabilities.WmsServiceDescription description =
/// new SharpMap.Web.Wms.Capabilities.WmsServiceDescription("Acme Corp. Map Server", url);
///
/// // The following service descriptions below are not strictly required by the WMS specification.
///
/// // Narrative description and keywords providing additional information
/// description.Abstract = "Map Server maintained by Acme Corporation. Contact: [email protected]. High-quality maps showing roadrunner nests and possible ambush locations.";
/// description.Keywords.Add("bird");
/// description.Keywords.Add("roadrunner");
/// description.Keywords.Add("ambush");
///
/// //Contact information
/// description.ContactInformation.PersonPrimary.Person = "John Doe";
/// description.ContactInformation.PersonPrimary.Organisation = "Acme Inc";
/// description.ContactInformation.Address.AddressType = "postal";
/// description.ContactInformation.Address.Country = "Neverland";
/// description.ContactInformation.VoiceTelephone = "1-800-WE DO MAPS";
/// //Impose WMS constraints
/// description.MaxWidth = 1000; //Set image request size width
/// description.MaxHeight = 500; //Set image request size height
///
/// //Call method that sets up the map
/// //We just add a dummy-size, since the wms requests will set the image-size
/// SharpMap.Map myMap = MapHelper.InitializeMap(new System.Drawing.Size(1,1));
///
/// //Parse the request and create a response
/// SharpMap.Web.Wms.WmsServer.ParseQueryString(myMap,description);
/// }
/// </code>
/// </example>
/// </remarks>
/// <param name="map">Map to serve on WMS</param>
/// <param name="description">Description of map service</param>
public static void ParseQueryString(Map map, Capabilities.WmsServiceDescription description)
{
_pixelSensitivity = 1;
if (map == null)
throw (new ArgumentException("Map for WMS is null"));
if (map.Layers.Count == 0)
throw (new ArgumentException("Map doesn't contain any layers for WMS service"));
if (HttpContext.Current == null)
throw (new ApplicationException(
"An attempt was made to access the WMS server outside a valid HttpContext"));
HttpContext context = HttpContext.Current;
//IgnoreCase value should be set according to the VERSION parameter
//v1.3.0 is case sensitive, but since it causes a lot of problems with several WMS clients, we ignore casing anyway.
bool ignorecase = true;
//Check for required parameters
//Request parameter is mandatory
if (context.Request.Params["REQUEST"] == null)
{
WmsException.ThrowWmsException("Required parameter REQUEST not specified");
return;
}
//Check if version is supported
if (context.Request.Params["VERSION"] != null)
{
if (String.Compare(context.Request.Params["VERSION"], "1.3.0", ignorecase) != 0)
{
WmsException.ThrowWmsException("Only version 1.3.0 supported");
return;
}
}
else
//Version is mandatory if REQUEST!=GetCapabilities. Check if this is a capabilities request, since VERSION is null
{
if (String.Compare(context.Request.Params["REQUEST"], "GetCapabilities", ignorecase) != 0)
{
WmsException.ThrowWmsException("VERSION parameter not supplied");
return;
}
}
//If Capabilities was requested
if (String.Compare(context.Request.Params["REQUEST"], "GetCapabilities", ignorecase) == 0)
{
//Service parameter is mandatory for GetCapabilities request
if (context.Request.Params["SERVICE"] == null)
{
WmsException.ThrowWmsException("Required parameter SERVICE not specified");
return;
}
if (String.Compare(context.Request.Params["SERVICE"], "WMS") != 0)
WmsException.ThrowWmsException(
"Invalid service for GetCapabilities Request. Service parameter must be 'WMS'");
XmlDocument capabilities = Capabilities.GetCapabilities(map, description);
context.Response.Clear();
context.Response.ContentType = "text/xml";
XmlWriter writer = XmlWriter.Create(context.Response.OutputStream);
capabilities.WriteTo(writer);
writer.Close();
context.Response.End();
}
else if (String.Compare(context.Request.Params["REQUEST"], "GetFeatureInfo", ignorecase) == 0) //FeatureInfo Requested
{
if (context.Request.Params["LAYERS"] == null)
{
WmsException.ThrowWmsException("Required parameter LAYERS not specified");
return;
}
if (context.Request.Params["STYLES"] == null)
{
WmsException.ThrowWmsException("Required parameter STYLES not specified");
return;
}
if (context.Request.Params["CRS"] == null)
{
WmsException.ThrowWmsException("Required parameter CRS not specified");
return;
}
else if (context.Request.Params["CRS"] != "EPSG:" + map.Layers[0].SRID)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidCRS, "CRS not supported");
return;
}
if (context.Request.Params["BBOX"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter BBOX not specified");
return;
}
if (context.Request.Params["WIDTH"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter WIDTH not specified");
return;
}
if (context.Request.Params["HEIGHT"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter HEIGHT not specified");
return;
}
if (context.Request.Params["FORMAT"] == null)
{
WmsException.ThrowWmsException("Required parameter FORMAT not specified");
return;
}
if (context.Request.Params["QUERY_LAYERS"] == null)
{
WmsException.ThrowWmsException("Required parameter QUERY_LAYERS not specified");
return;
}
if (context.Request.Params["INFO_FORMAT"] == null)
{
WmsException.ThrowWmsException("Required parameter INFO_FORMAT not specified");
return;
}
//parameters X&Y are not part of the 1.3.0 specification, but are included for backwards compatability with 1.1.1 (OpenLayers likes it when used together with wms1.1.1 services)
if (context.Request.Params["X"] == null && context.Request.Params["I"] == null)
{
WmsException.ThrowWmsException("Required parameter I not specified");
return;
}
if (context.Request.Params["Y"] == null && context.Request.Params["J"] == null)
{
WmsException.ThrowWmsException("Required parameter J not specified");
return;
}
//sets the map size to the size of the client in order to calculate the coordinates of the projection of the client
try
{
map.Size = new System.Drawing.Size(System.Convert.ToInt16(context.Request.Params["WIDTH"]), System.Convert.ToInt16(context.Request.Params["HEIGHT"]));
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for HEIGHT or WITDH");
return;
}
//sets the boundingbox to the boundingbox of the client in order to calculate the coordinates of the projection of the client
BoundingBox bbox = ParseBBOX(context.Request.Params["bbox"]);
if (bbox == null)
{
WmsException.ThrowWmsException("Invalid parameter BBOX");
return;
}
map.ZoomToBox(bbox);
//sets the point clicked by the client
SharpMap.Geometries.Point p = new SharpMap.Geometries.Point();
Single x = 0;
Single y = 0;
//tries to set the x to the Param I, if the client send an X, it will try the X, if both fail, exception is thrown
if (context.Request.Params["X"] != null)
try
{
x = System.Convert.ToSingle(context.Request.Params["X"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for I");
}
if (context.Request.Params["I"] != null)
try
{
x = System.Convert.ToSingle(context.Request.Params["I"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for I");
}
//same procedure for J (Y)
if (context.Request.Params["Y"] != null)
try
{
y = System.Convert.ToSingle(context.Request.Params["Y"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for I");
}
if (context.Request.Params["J"] != null)
try
{
y = System.Convert.ToSingle(context.Request.Params["J"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameters for I");
}
p = map.ImageToWorld(new System.Drawing.PointF(x, y));
int fc;
try
{
fc = System.Convert.ToInt16(context.Request.Params["FEATURE_COUNT"]);
if (fc < 1)
fc = 1;
}
catch
{
fc = 1;
}
String vstr = "GetFeatureInfo results: \n";
string[] requestLayers = context.Request.Params["QUERY_LAYERS"].Split(new[] { ',' });
foreach (string requestLayer in requestLayers)
{
bool found = false;
foreach (ILayer mapLayer in map.Layers)
{
if (String.Equals(mapLayer.LayerName, requestLayer,
StringComparison.InvariantCultureIgnoreCase))
{
found = true;
if (!(mapLayer is ICanQueryLayer)) continue;
ICanQueryLayer queryLayer = mapLayer as ICanQueryLayer;
if (queryLayer.IsQueryEnabled)
{
Single queryBoxMinX = x - (_pixelSensitivity);
Single queryBoxMinY = y - (_pixelSensitivity);
Single queryBoxMaxX = x + (_pixelSensitivity);
Single queryBoxMaxY = y + (_pixelSensitivity);
SharpMap.Geometries.Point minXY = map.ImageToWorld(new System.Drawing.PointF(queryBoxMinX, queryBoxMinY));
SharpMap.Geometries.Point maxXY = map.ImageToWorld(new System.Drawing.PointF(queryBoxMaxX, queryBoxMaxY));
BoundingBox queryBox = new BoundingBox(minXY, maxXY);
SharpMap.Data.FeatureDataSet fds = new SharpMap.Data.FeatureDataSet();
queryLayer.ExecuteIntersectionQuery(queryBox, fds);
if (_intersectDelegate != null)
{
fds.Tables[0] = _intersectDelegate(fds.Tables[0], queryBox);
}
if (fds.Tables.Count == 0)
{
vstr = vstr + "\nSearch returned no results on layer: " + requestLayer;
}
else
{
if (fds.Tables[0].Rows.Count == 0)
{
vstr = vstr + "\nSearch returned no results on layer: " + requestLayer + " ";
}
else
{
//if featurecount < fds...count, select smallest bbox, because most likely to be clicked
vstr = vstr + "\n Layer: '" + requestLayer + "'\n Featureinfo:\n";
int[] keys = new int[fds.Tables[0].Rows.Count];
double[] area = new double[fds.Tables[0].Rows.Count];
for (int l = 0; l < fds.Tables[0].Rows.Count; l++)
{
SharpMap.Data.FeatureDataRow fdr = fds.Tables[0].Rows[l] as SharpMap.Data.FeatureDataRow;
area[l] = fdr.Geometry.GetBoundingBox().GetArea();
keys[l] = l;
}
Array.Sort(area, keys);
if (fds.Tables[0].Rows.Count < fc)
{
fc = fds.Tables[0].Rows.Count;
}
for (int k = 0; k < fc; k++)
{
for (int j = 0; j < fds.Tables[0].Rows[keys[k]].ItemArray.Length; j++)
{
vstr = vstr + " '" + fds.Tables[0].Rows[keys[k]].ItemArray[j].ToString() + "'";
}
if ((k + 1) < fc)
vstr = vstr + ",\n";
}
}
}
}
}
}
if (found == false)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.LayerNotDefined,
"Unknown layer '" + requestLayer + "'");
return;
}
}
context.Response.Clear();
context.Response.ContentType = "text/plain";
context.Response.Charset = "windows-1252";
context.Response.Write(vstr);
context.Response.Flush();
context.Response.End();
}
else if (String.Compare(context.Request.Params["REQUEST"], "GetMap", ignorecase) == 0) //Map requested
{
//Check for required parameters
if (context.Request.Params["LAYERS"] == null)
{
WmsException.ThrowWmsException("Required parameter LAYERS not specified");
return;
}
if (context.Request.Params["STYLES"] == null)
{
WmsException.ThrowWmsException("Required parameter STYLES not specified");
return;
}
if (context.Request.Params["CRS"] == null)
{
WmsException.ThrowWmsException("Required parameter CRS not specified");
return;
}
else if (context.Request.Params["CRS"] != "EPSG:" + map.Layers[0].SRID)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidCRS, "CRS not supported");
return;
}
if (context.Request.Params["BBOX"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter BBOX not specified");
return;
}
if (context.Request.Params["WIDTH"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter WIDTH not specified");
return;
}
if (context.Request.Params["HEIGHT"] == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Required parameter HEIGHT not specified");
return;
}
if (context.Request.Params["FORMAT"] == null)
{
WmsException.ThrowWmsException("Required parameter FORMAT not specified");
return;
}
//Set background color of map
if (String.Compare(context.Request.Params["TRANSPARENT"], "TRUE", ignorecase) == 0)
map.BackColor = Color.Transparent;
else if (context.Request.Params["BGCOLOR"] != null)
{
try
{
map.BackColor = ColorTranslator.FromHtml(context.Request.Params["BGCOLOR"]);
}
catch
{
WmsException.ThrowWmsException("Invalid parameter BGCOLOR");
return;
}
;
}
else
map.BackColor = Color.White;
//Get the image format requested
ImageCodecInfo imageEncoder = GetEncoderInfo(context.Request.Params["FORMAT"]);
if (imageEncoder == null)
{
WmsException.ThrowWmsException("Invalid MimeType specified in FORMAT parameter");
return;
}
//Parse map size
int width = 0;
int height = 0;
if (!int.TryParse(context.Request.Params["WIDTH"], out width))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Invalid parameter WIDTH");
return;
}
else if (description.MaxWidth > 0 && width > description.MaxWidth)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Parameter WIDTH too large");
return;
}
if (!int.TryParse(context.Request.Params["HEIGHT"], out height))
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue,
"Invalid parameter HEIGHT");
return;
}
else if (description.MaxHeight > 0 && height > description.MaxHeight)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Parameter HEIGHT too large");
return;
}
map.Size = new Size(width, height);
BoundingBox bbox = ParseBBOX(context.Request.Params["bbox"]);
if (bbox == null)
{
WmsException.ThrowWmsException("Invalid parameter BBOX");
return;
}
map.PixelAspectRatio = (width / (double)height) / (bbox.Width / bbox.Height);
map.Center = bbox.GetCentroid();
map.Zoom = bbox.Width;
//Set layers on/off
if (!String.IsNullOrEmpty(context.Request.Params["LAYERS"]))
//If LAYERS is empty, use default layer on/off settings
{
string[] layers = context.Request.Params["LAYERS"].Split(new[] { ',' });
if (description.LayerLimit > 0)
{
if (layers.Length == 0 && map.Layers.Count > description.LayerLimit ||
layers.Length > description.LayerLimit)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported,
"Too many layers requested");
return;
}
}
foreach (ILayer layer in map.Layers)
layer.Enabled = false;
foreach (string layer in layers)
{
//SharpMap.Layers.ILayer lay = map.Layers.Find(delegate(SharpMap.Layers.ILayer findlay) { return findlay.LayerName == layer; });
ILayer lay = null;
for (int i = 0; i < map.Layers.Count; i++)
if (String.Equals(map.Layers[i].LayerName, layer,
StringComparison.InvariantCultureIgnoreCase))
lay = map.Layers[i];
if (lay == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.LayerNotDefined,
"Unknown layer '" + layer + "'");
return;
}
else
lay.Enabled = true;
}
}
//Render map
Image img = map.GetMap();
//Png can't stream directy. Going through a memorystream instead
MemoryStream MS = new MemoryStream();
img.Save(MS, imageEncoder, null);
img.Dispose();
byte[] buffer = MS.ToArray();
context.Response.Clear();
context.Response.ContentType = imageEncoder.MimeType;
context.Response.OutputStream.Write(buffer, 0, buffer.Length);
context.Response.End();
}
else
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.OperationNotSupported, "Invalid request");
}
