Added localredirect compatibility to TNetXNGFile

Co-authored-by: Jan Knedlik <j.knedlik@gsi.de>

net/netxng/inc/TNetXNGFile.h

@@ -58,7 +58,8 @@ public:
       fFile(0), fUrl(0), fMode(XrdCl::OpenFlags::None), fInitCondVar(0),
       fReadvIorMax(0), fReadvIovMax(0) {}
    TNetXNGFile(const char *url, Option_t *mode = "", const char *title = "",
-               Int_t compress = 1, Int_t netopt = 0, Bool_t parallelopen = kFALSE);
+               Int_t compress = 1, Int_t netopt = 0, Bool_t parallelopen = kFALSE,
+	       const char *lurl = 0);
    virtual ~TNetXNGFile();
 
    virtual void     Init(Bool_t create);

net/netxng/src/TNetXNGFile.cxx

@@ -127,8 +127,9 @@ TNetXNGFile::TNetXNGFile(const char *url,
                          const char *title,
                          Int_t       compress,
                          Int_t       /*netopt*/,
-                         Bool_t      parallelopen) :
-   TFile(url, "NET", title, compress)
+                         Bool_t      parallelopen,
+			 const char *lurl) :
+   TFile((lurl ? lurl : url), "NET", title, compress)
 {
    using namespace XrdCl;
 
@@ -725,6 +726,18 @@ Bool_t TNetXNGFile::GetVectorReadLimits()
    if (!fQueryReadVParams)
       return kTRUE;
 
+   std::string lasturl;
+   fFile->GetProperty("LastURL",lasturl);
+   URL lrl(lasturl);
+   //local redirect will split vector reads into multiple local reads anyway,
+   // so we are fine with the default values
+   if(0==lrl.GetProtocol().compare("file") &&
+      0==lrl.GetHostId().compare("localhost")){
+       if (gDebug>=1) 
+          Info("GetVectorReadLimits","Local redirect, using default values");
+       return kTRUE;
+   }
+
 #if XrdVNUMBER >= 40000
    std::string dataServerStr;
    if( !fFile->GetProperty( "DataServer", dataServerStr ) )