int BuildRssOutput(
string strDataFile,
string strNode,
out string strError)
{
int nRet = 0;
strError = "";
// 2018/1/27
if (strNode == null)
{
strError = "BuildRssOutput() 失败。strNode 参数值不应为 null";
return(-1);
}
string strDataFilePath = app.DataDir + "/browse/" + strDataFile;
XmlDocument dom = new XmlDocument();
try
{
dom.Load(strDataFilePath);
}
catch (Exception ex)
{
strError = "装载文件 '" + strDataFilePath + "' 时出错: " + ex.Message;
return(-1);
}
// 2014/12/2
// 兑现宏
nRet = CacheBuilder.MacroDom(dom,
new List <string> {
"name", "command"
},
out strError);
if (nRet == -1)
{
return(-1);
}
XmlNode node = null;
try
{
node = CacheBuilder.GetDataNode(dom.DocumentElement, strNode);
}
catch (Exception ex)
{
throw new Exception("CacheBuilder.GetDataNode() 出现异常，strNode=[" + strNode + "]", ex);
}
if (node == null)
{
strError = "路径 '" + strNode + "' 在文件 '" + strDataFile + "' 中没有找到对应的节点";
return(-1);
}
bool bRss = false;
long nMaxCount = -1;
string strDirection = "";
// parameters:
// nMaxCount -1表示无穷多
// strDirection head/tail
CacheBuilder.GetRssParam(node,
out bRss,
out nMaxCount,
out strDirection);
if (bRss == false)
{
strError = "此节点不允许输出RSS";
return(-1);
}
string strCommand = DomUtil.GetAttr(node, "command");
string strPureCaption = DomUtil.GetAttr(node, "name");
string strDescription = DomUtil.GetAttr(node, "description");
if (strCommand == "~hidelist~")
{
strError = "此节点 ~hidelist~ 不允许输出RSS";
return(-1);
}
if (strCommand == "~none~")
{
strError = "此节点 ~none~ 不允许输出RSS";
return(-1);
}
// strDataFile 中为纯文件名
string strPrefix = strNode;
string strCacheDir = app.DataDir + "/browse/cache/" + strDataFile;
PathUtil.TryCreateDir(strCacheDir);
string strResultsetFilename = strCacheDir + "/" + strPrefix;
// 如果RSS文件已经存在，就不要从 dp2library 获取了
if (File.Exists(strResultsetFilename + ".rss") == true)
{
// return:
// -1 出错
// 0 成功
// 1 暂时不能访问
nRet = DumpRssFile(strResultsetFilename + ".rss",
out strError);
if (nRet == -1)
{
return(-1);
}
return(0);
}
// 加入列表，要求创建RSS文件
/*
* lock (app.PendingCacheFiles)
* {
* string strLine = strDataFile + ":" + strNode + ":rss"; // 仅仅要求创建RSS文件
* if (app.PendingCacheFiles.IndexOf(strLine) == -1)
* app.PendingCacheFiles.Add(strLine);
* }
* app.ActivateCacheBuilder();
* */
CacheBuilder.AddToPendingList(app,
strDataFile,
strNode,
"rss");
// "相关缓存正在被创建，请稍后重新访问";
strError = "RSS file is building, please retry soon later... 相关缓存正在被创建，请稍后重新访问";
this.Response.ContentType = "text/plain; charset=utf-8";
this.Response.StatusCode = 503;
this.Response.StatusDescription = strError;
this.Response.Write(strError);
return(0);
}
void DisplayNode(string strDataFileName, string strNodePath)
{
int nRet = 0;
string strError = "";
this.BrowseSearchResultControl1.SelectAll(false);
string strXmlFilePath = app.DataDir + "/browse/" + strDataFileName;
XmlDocument dom = new XmlDocument();
dom.Load(strXmlFilePath);
// 2014/12/2
// 兑现宏
nRet = CacheBuilder.MacroDom(dom,
new List <string> {
"name", "command"
},
out strError);
if (nRet == -1)
{
goto ERROR1;
}
XmlNode node = null;
if (string.IsNullOrEmpty(strNodePath) == true)
{
// 找到第一个节点
node = GetFirstNode(dom.DocumentElement);
if (node == null)
{
return;
}
strNodePath = CacheBuilder.MakeNodePath(node);
}
else
{
// TODO: 也可以用节点文字名字来选定
node = CacheBuilder.GetDataNode(dom.DocumentElement, strNodePath);
if (node == null)
{
return;
}
}
this.TreeView1.SelectedNodePath = "";
this.SelectingNodePath = strNodePath;
string strPureCaption = DomUtil.GetAttr(node, "name");
string strDescription = DomUtil.GetAttr(node, "description");
if (String.IsNullOrEmpty(strDescription) == true)
{
this.Description1.Text = "";
}
else
{
this.Description1.Text = "<div class='text'>" + strDescription + "</div>";
}
string strCommand = DomUtil.GetAttr(node, "command");
bool bRss = false;
long nMaxCount = -1;
string strDirection = "";
// parameters:
// nMaxCount -1表示无穷多
// strDirection head/tail
CacheBuilder.GetRssParam(node,
out bRss,
out nMaxCount,
out strDirection);
// this.HyperLink_rss.Visible = bRss;
if (strCommand == "~hidelist~")
{
//
this.BrowseSearchResultControl1.ResultSetName = "";
this.BrowseSearchResultControl1.ResultsetFilename = "";
this.BrowseSearchResultControl1.ResultCount = 0;
this.BrowseSearchResultControl1.StartIndex = 0;
this.BrowseSearchResultControl1.Visible = false;
return;
}
this.BrowseSearchResultControl1.Visible = true;
if (strCommand == "~none~")
{
//
this.BrowseSearchResultControl1.ResultSetName = "";
this.BrowseSearchResultControl1.ResultsetFilename = "";
this.BrowseSearchResultControl1.ResultCount = 0;
this.BrowseSearchResultControl1.StartIndex = 0;
return;
}
#if NO
string strPureCaption = this.TreeView1.SelectedNode.Text;
nRet = strPureCaption.IndexOf("(");
if (nRet != -1)
{
strPureCaption = strPureCaption.Substring(0, nRet).Trim();
}
#endif
string strDataFile = strDataFileName; // PathUtil.PureName(strDataFile);
string strPrefix = CacheBuilder.MakeNodePath(node);
string strCacheDir = app.DataDir + "/browse/cache/" + strDataFile;
PathUtil.TryCreateDir(strCacheDir);
string strResultsetFilename = strCacheDir + "/" + strPrefix;
string strRssString = "datafile=" + strDataFile + "&node=" + strPrefix;
// this.HyperLink_rss.NavigateUrl = "browse.aspx?action=rss&" + strRssString;
string strRssNavigateUrl = "browse.aspx?action=rss&" + strRssString;
bool bRedo = false;
REDO:
// 如果文件已经存在，就不要从 dp2library 获取了
try
{
app.ResultsetLocks.LockForRead(strResultsetFilename, 500);
try
{
if (this.Response.IsClientConnected == false)
{
return;
}
if (File.Exists(strResultsetFilename) == true)
{
// 2010/12/21
// 看看是否为每日强制更新的节点
// 获得Build相关参数
// parameters:
// strBuildStyle 创建风格 perday / perhour
CacheBuilder.GetBuildParam(node,
out string strBuildStyle);
if (String.IsNullOrEmpty(strBuildStyle) == false &&
strBuildStyle.ToLower() != "disable")
{
// 比较文件创建时间和当前时间，看看是否超过重建周期
if (CacheBuilder.HasExpired(strResultsetFilename,
strBuildStyle) == true)
{
goto DO_REBUILD;
}
}
long lHitCount = CacheBuilder.GetCount(app, strResultsetFilename, false);
// 记忆下来
app.SetBrowseNodeCount(strDataFile, strNodePath, lHitCount.ToString());
this.BrowseSearchResultControl1.ResultsetFilename = strResultsetFilename;
this.BrowseSearchResultControl1.ResultCount = (int)lHitCount;
this.BrowseSearchResultControl1.StartIndex = 0;
this.CreateRssLink(strPureCaption, strRssNavigateUrl);
this.Page.Title = strPureCaption;
// this.SelectedNodeCaption = strPureCaption + "(" + lHitCount.ToString() + ")";
this.TreeView1.SelectedNodePath = strNodePath;
return;
}
}
finally
{
app.ResultsetLocks.UnlockForRead(strResultsetFilename);
}
}
catch (System.ApplicationException /*ex*/)
{
this.SetErrorInfo(strPureCaption + " 相关缓存文件暂时被占用，请稍后重新访问");
goto END1;
}
DO_REBUILD:
if (bRedo == false)
{
/*
* // 加入列表
* lock (app.PendingCacheFiles)
* {
* string strLine = strDataFile + ":" + strPrefix;
* if (app.PendingCacheFiles.IndexOf(strLine) == -1)
* app.PendingCacheFiles.Add(strLine);
* }
* app.ActivateCacheBuilder();
* */
CacheBuilder.AddToPendingList(app,
strDataFile,
strPrefix,
"");
bRedo = true;
if (Wait() == true)
{
return;
}
goto REDO;
}
else
{
this.SetErrorInfo(strPureCaption + " 相关缓存正在建立，请稍后重新访问");
// this.SelectedNodeCaption = strPureCaption;
}
END1:
this.CreateRssLink(strPureCaption, strRssNavigateUrl);
this.Page.Title = strPureCaption;
this.BrowseSearchResultControl1.ResultSetName = "";
this.BrowseSearchResultControl1.ResultsetFilename = "";
this.BrowseSearchResultControl1.ResultCount = 0;
this.BrowseSearchResultControl1.StartIndex = 0;
this.TreeView1.SelectedNodePath = strNodePath;
return;
ERROR1:
Response.Write(HttpUtility.HtmlEncode(strError));
Response.End();
}