// 编码(构造) Search响应包
int Encode_SearchResponse(SearchRequestInfo info,
out byte[] baPackage,
out string strError)
{
baPackage = null;
int nRet = 0;
long lRet = 0;
strError = "";
DiagFormat diag = null;
BerTree tree = new BerTree();
BerNode root = null;
long lSearchStatus = 0; // 0 失败；1成功
long lHitCount = 0;
string strQueryXml = "";
// 根据逆波兰表进行检索
// return:
// -1 error
// 0 succeed
nRet = BuildQueryXml(
info.m_dbnames,
info.m_rpnRoot,
out strQueryXml,
out strError);
if (nRet == -1)
{
SetPresentDiagRecord(ref diag,
2, // temporary system error
strError);
}
string strResultSetName = info.m_strResultSetName;
if (String.IsNullOrEmpty(strResultSetName) == true)
strResultSetName = "default";
if (diag == null)
{
lRet = _channel.Search(null,
strQueryXml,
strResultSetName,
"", // strOutputStyle
out strError);
/*
// 测试检索失败
lRet = -1;
strError = "测试检索失败";
* */
if (lRet == -1)
{
lSearchStatus = 0; // failed
SetPresentDiagRecord(ref diag,
2, // temporary system error
strError);
}
else
{
lHitCount = lRet;
lSearchStatus = 1; // succeed
}
}
root = tree.m_RootNode.NewChildConstructedNode(
BerTree.z3950_searchResponse,
BerNode.ASN1_CONTEXT);
// reference id
if (String.IsNullOrEmpty(info.m_strReferenceId) == false)
{
root.NewChildCharNode(BerTree.z3950_ReferenceId,
BerNode.ASN1_CONTEXT,
Encoding.UTF8.GetBytes(info.m_strReferenceId));
}
// resultCount
root.NewChildIntegerNode(BerTree.z3950_resultCount, // 23
BerNode.ASN1_CONTEXT, // ASNI_PRIMITIVE BUG!!!!
BitConverter.GetBytes((long)lHitCount));
// numberOfRecordsReturned
root.NewChildIntegerNode(BerTree.z3950_NumberOfRecordsReturned, // 24
BerNode.ASN1_CONTEXT, // ASNI_PRIMITIVE BUG!!!!
BitConverter.GetBytes((long)0/*info.m_lNumberOfRecordReturned*/)); // 0
// nextResultSetPosition
root.NewChildIntegerNode(BerTree.z3950_NextResultSetPosition, // 25
BerNode.ASN1_CONTEXT, // ASNI_PRIMITIVE BUG!!!!
BitConverter.GetBytes((long)1/*info.m_lNextResultSetPosition*/));
// 2007/11/7 原来本项位置不对，现在移动到这里
// bool
// searchStatus
root.NewChildIntegerNode(BerTree.z3950_searchStatus, // 22
BerNode.ASN1_CONTEXT, // ASNI_PRIMITIVE BUG!!!!
BitConverter.GetBytes((long)lSearchStatus));
// resultSetStatus OPTIONAL
// 2007/11/7
// presentStatus
root.NewChildIntegerNode(BerTree.z3950_presentStatus, // 27
BerNode.ASN1_CONTEXT, // ASNI_PRIMITIVE BUG!!!!
BitConverter.GetBytes((long)0));
// 诊断记录
if (diag != null)
{
BerNode nodeDiagRoot = root.NewChildConstructedNode(BerTree.z3950_nonSurrogateDiagnostic, // 130
BerNode.ASN1_CONTEXT);
diag.BuildBer(nodeDiagRoot);
}
baPackage = null;
root.EncodeBERPackage(ref baPackage);
return 0;
}
// 解码Search请求包
public static int Decode_SearchRequest(
BerNode root,
out SearchRequestInfo info,
out string strError)
{
strError = "";
int nRet = 0;
info = new SearchRequestInfo();
Debug.Assert(root != null, "");
if (root.m_uTag != BerTree.z3950_searchRequest)
{
strError = "root tag is not z3950_searchRequest";
return -1;
}
for (int i = 0; i < root.ChildrenCollection.Count; i++)
{
BerNode node = root.ChildrenCollection[i];
switch (node.m_uTag)
{
case BerTree.z3950_ReferenceId: // 2
info.m_strReferenceId = node.GetCharNodeData();
break;
case BerTree.z3950_smallSetUpperBound: // 13 smallSetUpperBound (Integer)
info.m_lSmallSetUpperBound = node.GetIntegerNodeData();
break;
case BerTree.z3950_largeSetLowerBound: // 14 largeSetLowerBound (Integer)
info.m_lLargeSetLowerBound = node.GetIntegerNodeData();
break;
case BerTree.z3950_mediumSetPresentNumber: // 15 mediumSetPresentNumber (Integer)
info.m_lMediumSetPresentNumber = node.GetIntegerNodeData();
break;
case BerTree.z3950_replaceIndicator: // 16 replaceIndicator, (boolean)
info.m_lReplaceIndicator = node.GetIntegerNodeData();
break;
case BerTree.z3950_resultSetName: // 17 resultSetName (string)
info.m_strResultSetName = node.GetCharNodeData();
break;
case BerTree.z3950_databaseNames: // 18 dbNames (sequence)
/*
// sequence is constructed, // have child with case = 105, (string)
m_saDBName.RemoveAll();
DecodeDBName(pNode, m_saDBName, m_bIsCharSetUTF8);
* */
{
List<string> dbnames = null;
nRet = DecodeDbnames(node,
out dbnames,
out strError);
if (nRet == -1)
return -1;
info.m_dbnames = dbnames;
}
break;
case BerTree.z3950_query: // 21 query (query)
// DecodeSearchQuery(pNode, m_strSQLWhere, pRPNStructureRoot);
{
BerNode rpn_root = GetRPNStructureRoot(node,
out strError);
if (rpn_root == null)
return -1;
info.m_rpnRoot = rpn_root;
}
break;
default:
break;
}
}
return 0;
}
