protected void Page_Load(object sender, EventArgs e)
{
this.BiblioSearchControl1.Location = this.TitleBarControl1.SelectedLibraryCode;
if (WebUtil.PrepareEnvironment(this,
ref app,
ref sessioninfo) == false)
{
return;
}
string strSideBarFile = Server.MapPath("./search_sidebar.xml");
if (File.Exists(strSideBarFile) == true)
{
this.SideBarControl1.CfgFile = strSideBarFile;
}
else
{
this.SideBarControl1.Visible = false;
}
SetSideBarVisible();
/*
* // 是否登录?
* if (sessioninfo.UserID == "")
* {
* sessioninfo.LoginCallStack.Push(Request.RawUrl);
* Response.Redirect("login.aspx", true);
* return;
* }
* */
if (this.BrowseSearchResultControl1.ResultCount > 0)
{
this.BrowseSearchResultControl1.Visible = true;
#if FILTER
VisibleFilter(true);
#endif
}
// 是否登录?
if (sessioninfo.UserID == "")
{
if (this.Page.Request["forcelogin"] == "on")
{
sessioninfo.LoginCallStack.Push(Request.RawUrl);
Response.Redirect("login.aspx", true);
return;
}
if (this.Page.Request["forcelogin"] == "userid")
{
sessioninfo.LoginCallStack.Push(Request.RawUrl);
Response.Redirect("login.aspx?loginstyle=librarian", true);
return;
}
sessioninfo.UserID = "public";
sessioninfo.IsReader = false;
/*
* sessioninfo.LoginCallStack.Push(Request.RawUrl);
* Response.Redirect("login.aspx", true);
* return;
* */
}
string strError = "";
int nRet = 0;
#if NO
string strAction = this.Request["action"];
if (strAction == "getdblist")
{
DoGetDbNameList();
return;
}
#endif
// 如果有参数
string strWord = this.Request["word"];
if (String.IsNullOrEmpty(strWord) == false &&
this.IsPostBack == false)
{
string strXml = "";
// string strWord = "";
string strDbName = "";
string strFrom = "";
string strMatchStyle = "";
GetSearchParams(out strWord,
out strDbName,
out strFrom,
out strMatchStyle);
// 根据检索参数创建XML检索式
nRet = OpacApplication.BuildQueryXml(
this.app,
strDbName, // this.Request["dbname"],
strWord,
strFrom, // this.Request["from"],
strMatchStyle, // this.Request["matchstyle"],
null,
null,
app.SearchMaxResultCount,
this.BiblioSearchControl1.SearchStyle, // strSearchStyle
out strXml,
out strError);
if (nRet == -1)
{
goto ERROR1;
}
string strResultSetNamePrefix = "";
strResultSetNamePrefix = this.Request["resultsetname"];
if (String.IsNullOrEmpty(strResultSetNamePrefix) == true)
{
strResultSetNamePrefix = Session.SessionID + "_opac_1";
}
else
{
strResultSetNamePrefix = Session.SessionID + "_" + strResultSetNamePrefix;
}
string strResultSetName = GetResultSetName(strResultSetNamePrefix);
LibraryChannel channel = sessioninfo.GetChannel(true);
//sessioninfo.Channel.
channel.Idle += new IdleEventHandler(channel_Idle);
try
{
long lRet = // sessioninfo.Channel.
channel.Search(
null,
strXml,
strResultSetName,
"", // strOutputStyle
out strError);
if (lRet == -1)
{
goto ERROR1;
}
#if FILTER
app.SetFilterTask(strResultSetName, null);
#endif
if (app.SearchLog != null)
{
SearchLogItem log = new SearchLogItem();
log.IP = this.Request.UserHostAddress.ToString();
log.Query = SearchLog.BuildLogQueryString(
this.Request["dbname"],
strWord,
this.Request["from"],
this.Request["matchstyle"]);
log.Time = DateTime.UtcNow;
log.HitCount = nRet;
log.Format = "searchcount";
app.SearchLog.AddLogItem(log);
}
// not found
if (lRet == 0)
{
this.BrowseSearchResultControl1.Visible = false;
#if FILTER
this.filter.Visible = false;
#endif
strError = "没有找到";
goto ERROR1;
}
this.BrowseSearchResultControl1.Clear();
this.BrowseSearchResultControl1.Visible = true;
#if FILTER
VisibleFilter(true);
#endif
this.BrowseSearchResultControl1.ResultSetName = strResultSetName;
this.BrowseSearchResultControl1.ResultCount = (int)lRet;
this.BrowseSearchResultControl1.StartIndex = 0; // 2008/12/15
#if FILTER
this.filter.ResultSetName = strResultSetName;
#endif
string strFormat = this.Request["format"];
if (String.IsNullOrEmpty(strFormat) == false)
{
this.BrowseSearchResultControl1.FormatName = strFormat;
}
return;
}
finally
{
// sessioninfo.Channel.
channel.Idle -= new IdleEventHandler(channel_Idle);
sessioninfo.ReturnChannel(channel);
}
}
// 观察特定的结果集
if (this.IsPostBack == false)
{
string strResultSet = this.Request["resultset"];
string strBaseResultSet = this.Request["base"];
string strTitle = this.Request["title"];
if (string.IsNullOrEmpty(strResultSet) == false)
{
string strResultsetFilename = PathUtil.MergePath(app.TempDir, // sessioninfo.GetTempDir(), // ??
strResultSet);
if (File.Exists(strResultsetFilename) == true)
{
long lHitCount = CacheBuilder.GetCount(app, strResultsetFilename, true);
this.BrowseSearchResultControl1.ResultsetFilename = strResultsetFilename;
this.BrowseSearchResultControl1.Visible = true;
#if FILTER
VisibleFilter(true);
this.filter.ResultSetName = strBaseResultSet;
#endif
string strOffset = this.Request["offset"];
this.BrowseSearchResultControl1.ResultsetOffset = strOffset;
#if FILTER
this.filter.SelectedNodePath = MakeSelectedPath(strResultSet, strOffset);
#endif
if (string.IsNullOrEmpty(strOffset) == false)
{
int nStart = 0;
int nLength = -1;
BrowseSearchResultControl.ParseOffsetString(strOffset,
out nStart,
out nLength);
if (nLength == -1)
{
nLength = (int)lHitCount - nStart;
}
this.BrowseSearchResultControl1.ResultCount = nLength;
}
else
{
this.BrowseSearchResultControl1.ResultCount = (int)lHitCount;
}
if (string.IsNullOrEmpty(strTitle) == false)
{
this.BrowseSearchResultControl1.Title = strTitle;
}
}
else
{
strError = "结果集文件 '" + strResultSet + "' 不存在";
goto ERROR1;
}
}
else if (string.IsNullOrEmpty(strBaseResultSet) == false)
{
// 只用了base参数
this.BrowseSearchResultControl1.Clear();
this.BrowseSearchResultControl1.Visible = true;
#if FILTER
VisibleFilter(true);
#endif
this.BrowseSearchResultControl1.ResultSetName = strBaseResultSet;
this.BrowseSearchResultControl1.ResultCount = (int)MyWebPage.GetServerResultCount(sessioninfo, strBaseResultSet);
this.BrowseSearchResultControl1.StartIndex = 0;
#if FILTER
this.filter.ResultSetName = strBaseResultSet;
#endif
}
}
//this.AdvanceSearchControl1.Channels = sessioninfo.Channels;
//this.AdvanceSearchControl1.ServerUrl = app.WsUrl;
// this.HeadBarControl1.CurrentColumn = HeaderColumn.Search;
return;
ERROR1:
Response.Write(HttpUtility.HtmlEncode(strError));
Response.End();
}
// 根据记录数量的多少，少的时候可以立即返回结果，多的时候用线程后台处理，然后可以随时查询状态
// 线程用线程池，避免过多耗用线程数目
// 根据结果集名，提取全部书目 XML 记录，然后批处理经过 MarcFilter 过滤，创建若干个子结果集
// 最基本的功能是返回子结果集的显示名，文件名，包含记录数量，供前端显示在界面上
// 较为深入的功能是，将子结果集按照 key 排序归并，而显示出二级条目和数量。二级结果集是子结果集的子结果集
// TODO: 如何及时清理Task对象，避免内存过度膨胀? 是否仅保存最新10个Task对象?
void GetFilterInfo(
string strResultsetName,
string strSelected,
string strLang)
{
string strError = "";
GetFilterInfo result_info = new GetFilterInfo();
if (string.IsNullOrEmpty(strResultsetName) == true)
{
strError = "结果集名不应为空";
goto ERROR1;
}
FilterTask t = app.FindFilterTask(strResultsetName); // Task对象是利用 Session 内结果集名来进行管理的
if (t == null)
{
// 如果一个结果集还没有被后台任务处理，就立即启动一个后台任务
t = new FilterTask();
app.SetFilterTask(strResultsetName, t);
string strGlobalResultSetName = "";
bool bShare = false;
if (strResultsetName[0] == '#')
{
strGlobalResultSetName = strResultsetName.Substring(1);
}
else
{
// 构造全局结果集名
strGlobalResultSetName = sessioninfo.GetHashCode() + "_" + strResultsetName;
LibraryChannel channel = sessioninfo.GetChannel(true);
try
{
// 先把结果集共享
// 管理结果集
// parameters:
// strAction share/remove 分别表示共享为全局结果集对象/删除全局结果集对象
long lRet = // sessioninfo.Channel.
channel.ManageSearchResult(
null,
"share",
strResultsetName,
strGlobalResultSetName,
out strError);
if (lRet == -1)
{
goto ERROR1;
}
bShare = true;
}
finally
{
sessioninfo.ReturnChannel(channel);
}
}
FilterTaskInput i = new FilterTaskInput();
i.App = app;
i.FilterFileName = Path.Combine(app.DataDir, "cfgs/facet.fltx");
i.ResultSetName = strGlobalResultSetName;
i.ShareResultSet = bShare;
// i.SessionInfo = sessioninfo;
i.TempDir = app.TempDir;
i.TaskName = strResultsetName; // Task对象是利用Session内结果集名来进行管理的
i.MaxCount = 1000;
// i.aggregation_names = new List<string>() {"author"};
XmlDocument def_dom = GetFacetDefDom(out strError);
if (def_dom == null)
{
goto ERROR1;
}
i.DefDom = def_dom;
ThreadPool.QueueUserWorkItem(t.ThreadPoolCallBack, i);
strError = "#pending"; // 表示正在处理，希望前端稍后重新访问
goto ERROR1;
}
else
{
if (t.TaskState == TaskState.Processing)
{
if (t.ProgressRange != 0)
{
result_info.ProgressValue = (int)(((double)t.ProgressValue / (double)t.ProgressRange) * 100);
}
strError = "#pending"; // 表示正在处理，希望前端稍后重新访问
goto ERROR1;
}
if (string.IsNullOrEmpty(t.ErrorInfo) == false)
{
strError = t.ErrorInfo;
goto ERROR1;
}
GC.Collect(); // 试着释放 Hashtable 等
long lHitCount = MyWebPage.GetServerResultCount(sessioninfo, strResultsetName);
XmlDocument def_dom = GetFacetDefDom(out strError);
if (def_dom == null)
{
goto ERROR1;
}
this.m_facetDom = def_dom;
this.m_strLang = strLang;
try
{
// 创建FilterInfo数组
result_info.Items = ResultsetFilter.BuildFilterInfos(
strResultsetName,
lHitCount,
strSelected,
GetKeyNameCaption,
t.ResultItems,
app.TempDir, // sessioninfo.GetTempDir(),
10);
// GC.Collect(); // 担心 DpResultSet 未能回收
}
catch (Exception ex)
{
strError = ExceptionUtil.GetAutoText(ex);
goto ERROR1;
}
if (t.HitCount > 1000)
{
result_info.Comment = "分面导航只提取了当前结果集的前 1000 条记录";
}
}
// 返回一级节点的名字和包含记录数量
this.Response.Write(MyWebPage.GetResultString(result_info));
this.Response.End();
return;
ERROR1:
result_info.ErrorString = strError;
this.Response.Write(MyWebPage.GetResultString(result_info));
this.Response.End();
}
