// NOTE: Client need to use the post method and no this GET method
// The ciwater hubzero based portal will not be able to show watershed
// since it using the following web service (the GET version) which tries to find the shapefile
// in a specfic fixed foldername where the delination service used to store the
// files. Now the delineation service code has been changed to dynamically create
// a folder based on guid for generated shape file storage.
public HttpResponseMessage GetShapeLatLonValues(string shapeFileName)
{
HttpResponseMessage response = new HttpResponseMessage();
string inputWatershedShapeFilePath = UEB.UEBSettings.WORKING_DIR_PATH;
if(string.IsNullOrEmpty(shapeFileName))
{
string errMsg = "No shape file name was provided";
logger.Error(errMsg);
return Request.CreateErrorResponse(HttpStatusCode.NotFound, errMsg);
}
string shapeFileExt = Path.GetExtension(Path.Combine(inputWatershedShapeFilePath, shapeFileName));
if (shapeFileExt == string.Empty)
{
shapeFileName += ".shp";
}
else if (shapeFileExt != ".shp")
{
shapeFileName.Replace(shapeFileExt, ".shp");
}
// check file exists
if (!File.Exists(Path.Combine(inputWatershedShapeFilePath, shapeFileName)))
{
string errMsg = shapeFileName + " was not found.";
logger.Error(errMsg);
return Request.CreateErrorResponse(HttpStatusCode.NotFound, errMsg);
}
FeatureSet fs;
try
{
fs = FeatureSet.Open(Path.Combine(inputWatershedShapeFilePath, shapeFileName)) as FeatureSet;
}
catch (Exception ex)
{
logger.Fatal(ex.Message);
return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex.Message);
}
// fill the attributes table
fs.FillAttributes();
string result = string.Empty;
List<ShapeDataSet> ShapeDataSetList = new List<ShapeDataSet>();
int seqNo = 1;
foreach (IFeature f in fs.Features)
{
Shape shp = f.ToShape();
ShapeDataSet sds = new ShapeDataSet();
sds.ShapeSequenceNumber = seqNo;
seqNo++;
List<ShapeData> shapeDataList = new List<ShapeData>();
for (int i = 0; i < shp.Vertices.Length; i++)
{
if (i % 2 == 0)
{
ShapeData sd = new ShapeData { Lat = shp.Vertices[i+1], Lon = shp.Vertices[i] };
shapeDataList.Add(sd);
}
}
sds.LatlonValues = shapeDataList;
ShapeDataSetList.Add(sds);
}
string jsonString = JsonConvert.SerializeObject(ShapeDataSetList, Formatting.Indented);
response.Content = new StringContent(jsonString);
response.StatusCode = HttpStatusCode.OK;
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
//Ref: http://weblogs.asp.net/cibrax/archive/2011/04/25/implementing-caching-in-your-wcf-web-apis.aspx
//set the browser to cache this response for 10 secs only
response.Content.Headers.Expires = DateTime.Now.AddSeconds(10);
return response;
}
/// <summary>
/// The caller (client) needs to send a zip file containing all shape related files. All files
/// need to have the same file name with different extensions
/// </summary>
/// <returns></returns>
public HttpResponseMessage PostShapeLatLonValues()
{
HttpResponseMessage response = new HttpResponseMessage();
Stream shapeFileToProcess = null;
var t_stream = this.Request.Content.ReadAsStreamAsync().ContinueWith(s =>
{
shapeFileToProcess = s.Result;
});
t_stream.Wait();
if (shapeFileToProcess == null)
{
string errMsg = "No shape file was provided in the request.";
logger.Error(errMsg);
return Request.CreateErrorResponse(HttpStatusCode.BadRequest, errMsg);
}
// generate a guid to pass on to the client as a job ID
string folderBasedOnGuid = Guid.NewGuid().ToString();
string inputShapeFilePath = Path.Combine(UEB.UEBSettings.WORKING_DIR_PATH, folderBasedOnGuid);
string inputShapeFile = Path.Combine(inputShapeFilePath, "shapefile.zip");
string unzipDirPath = Path.Combine(inputShapeFilePath, "ShapeFiles");
string fileWithSHPExtension = string.Empty;
try
{
// create temporary directory if it does not already exist
if (!Directory.Exists(inputShapeFilePath))
{
Directory.CreateDirectory(inputShapeFilePath);
}
if (File.Exists(inputShapeFile))
{
File.Delete(inputShapeFile);
}
if (Directory.Exists(unzipDirPath))
{
Directory.Delete(unzipDirPath);
}
Directory.CreateDirectory(unzipDirPath);
using (var fileStream = File.Create(inputShapeFile))
{
shapeFileToProcess.CopyTo(fileStream);
}
// unzip the zipped shape file
ZipFile.ExtractToDirectory(inputShapeFile, unzipDirPath);
// get the name of the file with .shp extension
string[] filesWithSHPExtension = Directory.GetFiles(unzipDirPath, "*.shp");
if (filesWithSHPExtension.Length != 1)
{
string errMsg = "Either no file with .shp extension was provided as part of the zip file or there are multiple files with .shp extension.";
logger.Error(errMsg);
response.StatusCode = HttpStatusCode.BadRequest;
response.Content = new StringContent(errMsg);
return response;
}
fileWithSHPExtension = filesWithSHPExtension[0];
}
catch (Exception ex)
{
logger.Fatal(ex.Message);
return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, ex.Message);
}
FeatureSet fs;
try
{
fs = FeatureSet.Open(fileWithSHPExtension) as FeatureSet;
}
catch (Exception ex)
{
logger.Fatal(ex.Message);
return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex.Message);
}
// fill the attributes table
fs.FillAttributes();
string result = string.Empty;
List<ShapeDataSet> ShapeDataSetList = new List<ShapeDataSet>();
int seqNo = 1;
foreach (IFeature f in fs.Features)
{
Shape shp = f.ToShape();
ShapeDataSet sds = new ShapeDataSet();
sds.ShapeSequenceNumber = seqNo;
seqNo++;
List<ShapeData> shapeDataList = new List<ShapeData>();
for (int i = 0; i < shp.Vertices.Length; i++)
{
if (i % 2 == 0)
{
ShapeData sd = new ShapeData { Lat = shp.Vertices[i + 1], Lon = shp.Vertices[i] };
shapeDataList.Add(sd);
}
}
sds.LatlonValues = shapeDataList;
ShapeDataSetList.Add(sds);
}
string jsonString = JsonConvert.SerializeObject(ShapeDataSetList, Formatting.Indented);
response.Content = new StringContent(jsonString);
response.StatusCode = HttpStatusCode.OK;
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
//Ref: http://weblogs.asp.net/cibrax/archive/2011/04/25/implementing-caching-in-your-wcf-web-apis.aspx
//set the browser to cache this response for 10 secs only
response.Content.Headers.Expires = DateTime.Now.AddSeconds(10);
// clean up the temporary folders for shape files
DirectoryInfo dir = new DirectoryInfo(inputShapeFilePath);
dir.Delete(true);
logger.Info(string.Format("Lat/lon values in json format were successfully created for shape file:{0}", fileWithSHPExtension));
return response;
}
