/// <summary>
/// Search CSW catalog using the provided criteria. Search result can be accessed by calling GetResponse().
/// </summary>
public void Search()
{
_response = new CswSearchResponse();
StringBuilder sb = new StringBuilder();
if (_criteria == null)
{
sb.AppendLine(DateTime.Now + " Criteria not specified.");
throw new NullReferenceException("Criteria not specified.");
}
if (_catalog == null)
{
sb.AppendLine(DateTime.Now + " Catalog not specified.");
throw new NullReferenceException("Catalog not specified.");
}
if (_catalog.URL == null || _catalog.URL.Length == 0)
{
sb.AppendLine(DateTime.Now + " Catalog URL not specified.");
throw new NullReferenceException("Catalog URL not specified.");
}
if (_catalog.Profile == null)
{
sb.AppendLine(DateTime.Now + " Catalog profile not specified.");
throw new NullReferenceException("Catalog profile not specified.");
}
CswProfile profile = _catalog.Profile;
writeLogMessage("Csw profile used : " + profile.Name);
// generate getRecords query
string requestUrl = "";
string requestQuery = "";
if (_catalog.Profile.isOGCRecords)
{
requestUrl = _catalog.URL;
requestQuery = "f=json&q=" + _criteria.SearchText;
}
else
{
requestUrl = _catalog.Capabilities.GetRecords_PostURL;
requestQuery = profile.GenerateCSWGetRecordsRequest(_criteria);
}
// requestQuery = "<csw:GetCapabilities xmlns:csw=\"http://www.opengis.net/cat/csw/2.0.2\" request=\"GetCapabilities\" service=\"CSW\" version=\"2.0.2\"/>";
requestQuery = requestQuery.Replace("utf-16", "utf-8");
requestQuery = requestQuery.Replace("UTF-16", "UTF-8");
// submit search query
if (_cswClient == null)
{
_cswClient = new CswClient();
}
string responseText;
sb.AppendLine(DateTime.Now + " Sending CSW GetRecords request to endpoint : " + requestUrl);
sb.AppendLine("Request Query : " + requestQuery);
if (_catalog.Profile.isOGCRecords)
{
responseText = _cswClient.SubmitHttpRequest("GET", requestUrl, requestQuery);
}
else
{
if (!_catalog.Capabilities.GetRecords_IsSoapEndPoint)
{
responseText = _cswClient.SubmitHttpRequest("POST", requestUrl, requestQuery);
}
else
{
responseText = _cswClient.SubmitHttpRequest("SOAP", requestUrl, requestQuery);
}
}
// parse out csw search records
CswRecords records = new CswRecords();
sb.AppendLine(DateTime.Now + " Response received : " + responseText);
if (_catalog.Profile.isOGCRecords)
{
profile.ReadOGCAPIRecordsResponse(responseText, records);
}
else
{
profile.ReadCSWGetRecordsResponse(responseText, records);
}
sb.AppendLine(DateTime.Now + " Parsed GetRecords response.");
// populate CSW response
_response.ResponseXML = responseText;
_response.Records = records;
writeLogMessage(sb.ToString());
}
/// <summary>
/// Parse a CSW response.
/// </summary>
/// <remarks>
/// The CSW response is parsed and the records collection is populated
/// with the result.The reponse is parsed based on the response xslt.
/// </remarks>
/// <param name="param1">The string response</param>
/// <param name="param2">The recordlist which needs to be populated</param>
public void ReadCSWGetRecordsResponse(string responsestring, CswRecords recordslist)
{
try
{
TextReader textreader = new StringReader(responsestring);
XmlTextReader xmltextreader = new XmlTextReader(textreader);
//load the Xml doc
XPathDocument xPathDoc = new XPathDocument(xmltextreader);
if (responsexsltobj == null)
{
responsexsltobj = new XslCompiledTransform();
XsltSettings settings = new XsltSettings(true, true);
responsexsltobj.Load(responsexslt, settings, new XmlUrlResolver());
}
//create the output stream
StringWriter writer = new StringWriter();
//do the actual transform of Xml
responsexsltobj.Transform(xPathDoc, null, writer);
writer.Close();
//populate CswRecords
XmlDocument doc = new XmlDocument();
doc.LoadXml(writer.ToString());
XmlNodeList xmlnodes = doc.GetElementsByTagName("Record");
foreach (XmlNode xmlnode in xmlnodes)
{
CswRecord record = new CswRecord();
record.ID = xmlnode.SelectSingleNode("ID").InnerText;
record.Title = xmlnode.SelectSingleNode("Title").InnerText;
record.Abstract = xmlnode.SelectSingleNode("Abstract").InnerText;
String lowercorner = "";
if (this.SupportSpatialBoundary)
{
lowercorner = xmlnode.SelectSingleNode("LowerCorner").InnerText;
}
String uppercorner = "";
if (this.SupportSpatialBoundary)
{
uppercorner = xmlnode.SelectSingleNode("UpperCorner").InnerText;
}
if ((lowercorner.Length > 0 && uppercorner.Length > 0))
{
/* record.BoundingBox.Maxx = Double.Parse(lowercorner.Substring(0, lowercorner.IndexOf(' ')));
record.BoundingBox.Miny = Double.Parse(lowercorner.Substring(lowercorner.IndexOf(' ') + 1));
record.BoundingBox.Minx = Double.Parse(uppercorner.Substring(0, uppercorner.IndexOf(' ')));
record.BoundingBox.Maxy = Double.Parse(uppercorner.Substring(uppercorner.IndexOf(' ') + 1));*/
Boolean parseFlag = false;
CultureInfo cultureInfo = new CultureInfo("en-us");
double pareseResult = 0.0;
parseFlag = Double.TryParse(lowercorner.Substring(0, lowercorner.IndexOf(' ')), NumberStyles.Number, cultureInfo, out pareseResult);
record.BoundingBox.Minx = pareseResult;
parseFlag = Double.TryParse(lowercorner.Substring(lowercorner.IndexOf(' ') + 1), NumberStyles.Number, cultureInfo, out pareseResult);
record.BoundingBox.Miny = pareseResult;
parseFlag = Double.TryParse(uppercorner.Substring(0, uppercorner.IndexOf(' ')), NumberStyles.Number, cultureInfo, out pareseResult);
record.BoundingBox.Maxx = pareseResult;
parseFlag = Double.TryParse(uppercorner.Substring(uppercorner.IndexOf(' ') + 1), NumberStyles.Number, cultureInfo, out pareseResult);
record.BoundingBox.Maxy = pareseResult;
if (parseFlag == false)
{
throw new Exception("Number format error");
}
}
else
{
record.BoundingBox.Maxx = 500.00;
record.BoundingBox.Miny = 500.00;
record.BoundingBox.Minx = 500.00;
record.BoundingBox.Maxy = 500.00;
}
XmlNode node = xmlnode.SelectSingleNode("Type");
if (node != null)
{
record.IsLiveDataOrMap = node.InnerText.Equals("liveData", StringComparison.OrdinalIgnoreCase);
if (!record.IsLiveDataOrMap)
{
record.IsLiveDataOrMap = node.InnerText.Equals("downloadableData", StringComparison.OrdinalIgnoreCase);
}
}
else
{
record.IsLiveDataOrMap = false;
}
XmlNode referencesNode = xmlnode.SelectSingleNode("References");
if (referencesNode != null)
{
String references = referencesNode.InnerText;
DcList list = new DcList();
list.add(references);
determineResourceUrl(record, list);
/* LinkedList<String> serverList = list.get(DcList.getScheme(DcList.Scheme.SERVER));
if (serverList.Count > 0)
{
String serviceType = getServiceType(serverList.First.Value);
if (serviceType.Equals("aims") || serviceType.Equals("ags") || serviceType.Equals("wms") || serviceType.Equals("wcs"))
{
record.MapServerURL = serverList.First.Value;
}
}*/
}
else
record.MapServerURL = "";
recordslist.AddRecord(record.ID.GetHashCode(), record);
}
}
catch (Exception e)
{
throw e;
}
//return recordslist;
}
/// <summary>
/// Retrieve metadata from CSW service by its ID
/// </summary>
/// <param name="DocID">Metadata document ID</param>
public bool GetMetadataByID(string DocID, bool bApplyTransform)
{
_response = new CswSearchResponse();
StringBuilder sb = new StringBuilder();
if (DocID == null || DocID == "")
{
throw new ArgumentNullException();
}
if (_catalog == null)
{
throw new NullReferenceException("Catalog not specified.");
}
if (_catalog.Capabilities == null)
{
throw new NullReferenceException("Catalog capabilities not initialized.");
}
if (_catalog.Profile == null)
{
throw new NullReferenceException("Catalog profile not specified.");
}
if (_catalog.Capabilities.GetRecordByID_GetURL == null || _catalog.Capabilities.GetRecordByID_GetURL.Length == 0)
{
throw new NullReferenceException("GetRecordByID URL not specified for the catalog capabilities.");
}
CswProfile profile = _catalog.Profile;
writeLogMessage(" Csw profile used : " + profile.Name);
// generate request url
string getRecordByIDBaseUrl = _catalog.Capabilities.GetRecordByID_GetURL;
string requestUrl = profile.GenerateCSWGetMetadataByIDRequestURL(getRecordByIDBaseUrl, DocID);
sb.AppendLine(DateTime.Now + " GetRecordsById request URL : " + requestUrl);
if (_cswClient == null)
{
_cswClient = new CswClient();
}
string responseText = _cswClient.SubmitHttpRequest("GET", requestUrl, "");
_response.ResponseXML = responseText;
sb.AppendLine(DateTime.Now + " GetRecordsById response xml : " + responseText);
CswRecord record = new CswRecord(DocID);
bool isTransformed = false;
if (bApplyTransform)
{
isTransformed = profile.TransformCSWGetMetadataByIDResponse(responseText, record);
if (isTransformed)
{
sb.AppendLine(DateTime.Now + " Transformed xml : " + record.FullMetadata);
}
}
else
{
record.FullMetadata = responseText;
}
/*if (!isTransformed)
* {
* XmlDocument responseXml = new XmlDocument();
* try { responseXml.LoadXml(responseText); }
* catch (XmlException xmlEx)
* {
* throw new XmlException("Error occurred \r\n" + xmlEx.Message);
* }
* record.FullMetadata = responseXml.FirstChild.InnerText ;
* }*/
// add record to the response
CswRecords records = new CswRecords();
if (record != null)
{
records.Add(record.ID, record);
}
_response.Records = records;
_mapServerUrl = record.MapServerURL;
if (_mapServerUrl != null)
{
sb.AppendLine(DateTime.Now + " Map Server Url : " + _mapServerUrl);
}
writeLogMessage(sb.ToString());
return(isTransformed);
}
/// <summary>
/// Get Add to map information
/// </summary>
/// <param name="DocID">document identifier</param>
public void GetAddToMapInfoByID(string DocID)
{
_response = new CswSearchResponse();
StringBuilder sb = new StringBuilder();
if (DocID == null || DocID == "")
{
throw new ArgumentNullException();
}
if (_catalog == null)
{
throw new NullReferenceException("Catalog not specified.");
}
if (_catalog.Capabilities == null)
{
throw new NullReferenceException("Catalog capabilities not initialized.");
}
if (_catalog.Profile == null)
{
throw new NullReferenceException("Catalog profile not specified.");
}
if (_catalog.Capabilities.GetRecordByID_GetURL == null || _catalog.Capabilities.GetRecordByID_GetURL.Length == 0)
{
sb.AppendLine(DateTime.Now + " GetRecordByID URL not specified for the catalog capabilities.");
throw new NullReferenceException("GetRecordByID URL not specified for the catalog capabilities.");
}
CswProfile profile = _catalog.Profile;
// generate request url
string getRecordByIDBaseUrl = _catalog.Capabilities.GetRecordByID_GetURL;
string requestUrl = profile.GenerateCSWGetMetadataByIDRequestURL(getRecordByIDBaseUrl, DocID);
sb.AppendLine(DateTime.Now + " GetRecordsById request URL : " + requestUrl);
if (_cswClient == null)
{
_cswClient = new CswClient();
}
string responseText = _cswClient.SubmitHttpRequest("GET", requestUrl, "");
_response.ResponseXML = responseText;
sb.AppendLine(DateTime.Now + " GetRecordsById response xml : " + responseText);
CswRecord record = new CswRecord(DocID);
profile.ReadCSWGetMetadataByIDResponse(responseText, record);
if (record.MetadataResourceURL != null && record.MetadataResourceURL.Equals("") && profile.Name.Equals("terra catalog CSW 2.0.2 AP ISO"))
{
record.FullMetadata = responseText;
}
if (record == null)
{
throw new NullReferenceException("Record not populated.");
}
// check if full metadata or resourceURL has been returned
bool hasFullMetadata = !(record.FullMetadata == null || record.FullMetadata == "");
bool hasResourceUrl = !(record.MetadataResourceURL == null || record.MetadataResourceURL == "");
if (!hasFullMetadata && !hasResourceUrl)
{
// throw new InvalidOperationException("Neither full metadata nor metadata resource URL was found for the CSW record.");
}
else if (!hasFullMetadata && record.MetadataResourceURL != null)
{
// need to load metadata from resource URL
responseText = _cswClient.SubmitHttpRequest("GET", record.MetadataResourceURL, "", "", "");
record.FullMetadata = responseText;
}
// add record to the response
CswRecords records = new CswRecords();
if (record != null)
{
records.Add(record.ID, record);
}
_response.Records = records;
_mapServerUrl = record.MapServerURL;
if (_mapServerUrl != null)
{
sb.AppendLine(DateTime.Now + " Map Server Url : " + _mapServerUrl);
}
writeLogMessage(sb.ToString());
}
/// <summary>
/// Constructor
/// </summary>
public CswSearchResponse()
{
_responseXML = "";
_records = new CswRecords();
}
/// <summary>
/// Constructor
/// </summary>
public CswSearchResponse()
{
_responseXML = "";
_records = new CswRecords();
}
/// <summary>
/// Search CSW catalog using the provided criteria. Search result can be accessed by calling GetResponse().
/// </summary>
public void Search()
{
_response = new CswSearchResponse();
StringBuilder sb = new StringBuilder();
if (_criteria == null) {
sb.AppendLine(DateTime.Now + " Criteria not specified.");
throw new NullReferenceException("Criteria not specified."); }
if (_catalog == null) {
sb.AppendLine(DateTime.Now + " Catalog not specified.");
throw new NullReferenceException("Catalog not specified."); }
if (_catalog.URL == null || _catalog.URL.Length == 0)
{
sb.AppendLine(DateTime.Now + " Catalog URL not specified.");
throw new NullReferenceException("Catalog URL not specified.");
}
if (_catalog.Profile == null)
{
sb.AppendLine(DateTime.Now + " Catalog profile not specified.");
throw new NullReferenceException("Catalog profile not specified.");
}
CswProfile profile = _catalog.Profile;
writeLogMessage("Csw profile used : " + profile.Name);
// generate getRecords query
string requestUrl = _catalog.Capabilities.GetRecords_PostURL;
string requestQuery = profile.GenerateCSWGetRecordsRequest(_criteria);
// requestQuery = "<csw:GetCapabilities xmlns:csw=\"http://www.opengis.net/cat/csw/2.0.2\" request=\"GetCapabilities\" service=\"CSW\" version=\"2.0.2\"/>";
requestQuery = requestQuery.Replace("utf-16", "utf-8");
requestQuery = requestQuery.Replace("UTF-16", "UTF-8");
// submit search query
if (_cswClient == null) { _cswClient = new CswClient(); }
string responseText;
sb.AppendLine(DateTime.Now + " Sending CSW GetRecords request to endpoint : " + requestUrl);
sb.AppendLine("Request Query : " + requestQuery);
if(!_catalog.Capabilities.GetRecords_IsSoapEndPoint)
responseText = _cswClient.SubmitHttpRequest("POST", requestUrl, requestQuery);
else
responseText = _cswClient.SubmitHttpRequest("SOAP", requestUrl, requestQuery);
// parse out csw search records
CswRecords records = new CswRecords();
sb.AppendLine(DateTime.Now + " Response received : " + responseText);
profile.ReadCSWGetRecordsResponse(responseText, records);
sb.AppendLine(DateTime.Now + " Parsed GetRecords response.");
// populate CSW response
_response.ResponseXML = responseText;
_response.Records = records;
writeLogMessage(sb.ToString());
}
/// <summary>
/// Get Add to map information
/// </summary>
/// <param name="DocID">document identifier</param>
public void GetAddToMapInfoByID(string DocID)
{
_response = new CswSearchResponse();
StringBuilder sb = new StringBuilder();
if (DocID == null || DocID == "") { throw new ArgumentNullException(); }
if (_catalog == null) { throw new NullReferenceException("Catalog not specified."); }
if (_catalog.Capabilities == null) { throw new NullReferenceException("Catalog capabilities not initialized."); }
if (_catalog.Profile == null) { throw new NullReferenceException("Catalog profile not specified."); }
if (_catalog.Capabilities.GetRecordByID_GetURL == null || _catalog.Capabilities.GetRecordByID_GetURL.Length == 0)
{
sb.AppendLine(DateTime.Now + " GetRecordByID URL not specified for the catalog capabilities.");
throw new NullReferenceException("GetRecordByID URL not specified for the catalog capabilities.");
}
CswProfile profile = _catalog.Profile;
// generate request url
string getRecordByIDBaseUrl = _catalog.Capabilities.GetRecordByID_GetURL;
string requestUrl = profile.GenerateCSWGetMetadataByIDRequestURL(getRecordByIDBaseUrl, DocID);
sb.AppendLine(DateTime.Now + " GetRecordsById request URL : " + requestUrl);
if (_cswClient == null) { _cswClient = new CswClient(); }
string responseText = _cswClient.SubmitHttpRequest("GET", requestUrl, "");
_response.ResponseXML = responseText;
sb.AppendLine(DateTime.Now + " GetRecordsById response xml : " + responseText);
CswRecord record = new CswRecord(DocID);
profile.ReadCSWGetMetadataByIDResponse(responseText, record);
if (record.MetadataResourceURL != null && record.MetadataResourceURL.Equals("") && profile.Name.Equals("terra catalog CSW 2.0.2 AP ISO"))
{
record.FullMetadata = responseText;
}
if (record == null) { throw new NullReferenceException("Record not populated."); }
// check if full metadata or resourceURL has been returned
bool hasFullMetadata = !(record.FullMetadata == null || record.FullMetadata == "");
bool hasResourceUrl = !(record.MetadataResourceURL == null || record.MetadataResourceURL == "");
if (!hasFullMetadata && !hasResourceUrl)
{
// throw new InvalidOperationException("Neither full metadata nor metadata resource URL was found for the CSW record.");
}
else if (!hasFullMetadata && record.MetadataResourceURL != null)
{
// need to load metadata from resource URL
responseText = _cswClient.SubmitHttpRequest("GET", record.MetadataResourceURL, "", "", "");
record.FullMetadata = responseText;
}
// add record to the response
CswRecords records = new CswRecords();
if (record != null) { records.Add(record.ID, record); }
_response.Records = records;
_mapServerUrl = record.MapServerURL;
if (_mapServerUrl != null)
sb.AppendLine(DateTime.Now + " Map Server Url : " + _mapServerUrl);
writeLogMessage(sb.ToString());
}
/// <summary>
/// Retrieve metadata from CSW service by its ID
/// </summary>
/// <param name="DocID">Metadata document ID</param>
public bool GetMetadataByID(string DocID, bool bApplyTransform)
{
_response = new CswSearchResponse();
StringBuilder sb = new StringBuilder();
if (DocID == null || DocID == "") { throw new ArgumentNullException(); }
if (_catalog == null) { throw new NullReferenceException("Catalog not specified."); }
if (_catalog.Capabilities == null) { throw new NullReferenceException("Catalog capabilities not initialized."); }
if (_catalog.Profile == null) { throw new NullReferenceException("Catalog profile not specified."); }
if (_catalog.Capabilities.GetRecordByID_GetURL == null || _catalog.Capabilities.GetRecordByID_GetURL.Length == 0)
{
throw new NullReferenceException("GetRecordByID URL not specified for the catalog capabilities.");
}
CswProfile profile = _catalog.Profile;
writeLogMessage(" Csw profile used : " + profile.Name);
// generate request url
string getRecordByIDBaseUrl = _catalog.Capabilities.GetRecordByID_GetURL;
string requestUrl = profile.GenerateCSWGetMetadataByIDRequestURL(getRecordByIDBaseUrl, DocID);
sb.AppendLine(DateTime.Now + " GetRecordsById request URL : " + requestUrl);
if (_cswClient == null) { _cswClient = new CswClient(); }
string responseText = _cswClient.SubmitHttpRequest("GET", requestUrl, "");
_response.ResponseXML = responseText;
sb.AppendLine(DateTime.Now + " GetRecordsById response xml : " + responseText);
CswRecord record = new CswRecord(DocID);
bool isTransformed = false;
if (bApplyTransform)
{
isTransformed = profile.TransformCSWGetMetadataByIDResponse(responseText, record);
if(isTransformed)
sb.AppendLine(DateTime.Now + " Transformed xml : " + record.FullMetadata);
}
else
{
record.FullMetadata = responseText;
}
/*if (!isTransformed)
{
XmlDocument responseXml = new XmlDocument();
try { responseXml.LoadXml(responseText); }
catch (XmlException xmlEx)
{
throw new XmlException("Error occurred \r\n" + xmlEx.Message);
}
record.FullMetadata = responseXml.FirstChild.InnerText ;
}*/
// add record to the response
CswRecords records = new CswRecords();
if (record != null) { records.Add(record.ID, record); }
_response.Records = records;
_mapServerUrl = record.MapServerURL;
if (_mapServerUrl != null)
sb.AppendLine(DateTime.Now + " Map Server Url : " + _mapServerUrl);
writeLogMessage(sb.ToString());
return isTransformed;
}
