/// <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);
}
}
public void request_generates_valid_html()
{
const string expectedHtml = @"<html>
<head>
<title>GetFeatureInfo output</title>
</head>
<style type='text/css'>
table.featureInfo, table.featureInfo td, table.featureInfo th {
border:1px solid #ddd;
border-collapse:collapse;
margin:0;
padding:0;
font-size: 90%;
padding:.2em .1em;
}
table.featureInfo th {
padding:.2em .2em;
font-weight:bold;
background:#eee;
}
table.featureInfo td {
background:#fff;
}
table.featureInfo tr.odd td {
background:#eee;
}
table.featureInfo caption {
text-align:left;
font-size:100%;
font-weight:bold;
padding:.2em .2em;
}
</style>
<body>
<table class='featureInfo'>
<caption class='featureInfo'>poly_landmarks</caption>
<tr>
<th>Oid</th>
<th>LAND</th>
<th>CFCC</th>
<th>LANAME</th>
</tr>
<tr class='even'>
<td>52</td>
<td>76</td>
<td>D65</td>
<td>City Hall</td>
</tr>
<tr class='odd'>
<td>47</td>
<td>69</td>
<td>H11</td>
<td>Hudson River</td>
</tr>
</table>
<br />
<table class='featureInfo'>
<caption class='featureInfo'>tiger_roads</caption>
<tr>
<th>Oid</th>
<th>CFCC</th>
<th>NAME</th>
</tr>
<tr class='even'>
<td>7664</td>
<td>A41</td>
<td>Broadway</td>
</tr>
<tr class='odd'>
<td>7667</td>
<td>A41</td>
<td>Broadway</td>
</tr>
<tr class='even'>
<td>6016</td>
<td>A41</td>
<td>Barclay St</td>
</tr>
</table>
<br />
</body>
</html>";
MockRepository mocks = new MockRepository();
IContextRequest req = mocks.StrictMock<IContextRequest>();
With.Mocks(mocks)
.Expecting(() =>
{
Expect.Call(req.GetParam("VERSION")).Return("1.3.0");
Expect.Call(req.GetParam("LAYERS")).Return("poly_landmarks,tiger_roads,poi");
Expect.Call(req.GetParam("STYLES")).Return("");
Expect.Call(req.GetParam("CRS")).Return("EPSG:4326");
Expect.Call(req.GetParam("BBOX")).Return("40.689903,-74.02474,40.724235,-73.98955");
Expect.Call(req.GetParam("WIDTH")).Return("800");
Expect.Call(req.GetParam("HEIGHT")).Return("820");
Expect.Call(req.GetParam("FORMAT")).Return("image/png");
Expect.Call(req.GetParam("CQL_FILTER")).Return(null);
Expect.Call(req.GetParam("QUERY_LAYERS")).Return("poly_landmarks,tiger_roads,poi");
Expect.Call(req.GetParam("INFO_FORMAT")).Return("text/html");
Expect.Call(req.GetParam("X")).Return(null);
Expect.Call(req.GetParam("I")).Return("378");
Expect.Call(req.GetParam("Y")).Return(null);
Expect.Call(req.GetParam("J")).Return("288");
Expect.Call(req.GetParam("FEATURE_COUNT")).Return("10");
})
.Verify(() =>
{
IHandler handler = new GetFeatureInfoHtml(Desc);
IHandlerResponse resp = handler.Handle(Map, req);
Assert.That(resp, Is.Not.Null);
Assert.IsInstanceOf<GetFeatureInfoResponseHtml>(resp);
GetFeatureInfoResponseHtml html = (GetFeatureInfoResponseHtml)resp;
string contentType = html.ContentType;
Assert.That(contentType, Is.Not.Null);
Assert.That(contentType, Is.EqualTo("text/html"));
string charset = html.Charset;
Assert.That(charset, Is.Not.Null);
Assert.That(charset, Is.EqualTo("utf-8"));
string actual = html.Response;
string expected = expectedHtml.Replace(Environment.NewLine, new String('\n', 1));
Assert.That(actual, Is.EqualTo(expected));
});
}
