merge from trunk

[apt.git] / apt-pkg / acquire-item.cc

diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc
index b5c2149cc6096f3bca4d1d42904738a465ea102b..2c4ce91a01496bde3cd24e66982995ffd8d71d3a 100644 (file)
--- a/apt-pkg/acquire-item.cc
+++ b/apt-pkg/acquire-item.cc
@@ -15,6 +15,7 @@
 // Include Files                                                       /*{{{*/
 #include <apt-pkg/acquire-item.h>
 #include <apt-pkg/configuration.h>
 // Include Files                                                       /*{{{*/
 #include <apt-pkg/acquire-item.h>
 #include <apt-pkg/configuration.h>

+#include <apt-pkg/aptconfiguration.h>

 #include <apt-pkg/sourcelist.h>
 #include <apt-pkg/vendorlist.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/sourcelist.h>
 #include <apt-pkg/vendorlist.h>
 #include <apt-pkg/error.h>


@@ -32,6 +33,7 @@
 #include <string>
 #include <sstream>
 #include <stdio.h>
 #include <string>
 #include <sstream>
 #include <stdio.h>

+#include <ctime>

                                                                        /*}}}*/
 
 using namespace std;
                                                                        /*}}}*/
 
 using namespace std;


@@ -80,7 +82,7 @@ void pkgAcquire::Item::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
       Status = StatError;
       Dequeue();
    }   
       Status = StatError;
       Dequeue();
    }   

-   
+

    // report mirror failure back to LP if we actually use a mirror
    string FailReason = LookupTag(Message, "FailReason");
    if(FailReason.size() != 0)
    // report mirror failure back to LP if we actually use a mirror
    string FailReason = LookupTag(Message, "FailReason");
    if(FailReason.size() != 0)


@@ -138,7 +140,8 @@ void pkgAcquire::Item::Rename(string From,string To)
    }   
 }
                                                                        /*}}}*/
    }   
 }
                                                                        /*}}}*/

-
+// Acquire::Item::ReportMirrorFailure                                  /*{{{*/
+// ---------------------------------------------------------------------

 void pkgAcquire::Item::ReportMirrorFailure(string FailCode)
 {
    // we only act if a mirror was used at all
 void pkgAcquire::Item::ReportMirrorFailure(string FailCode)
 {
    // we only act if a mirror was used at all


@@ -180,10 +183,8 @@ void pkgAcquire::Item::ReportMirrorFailure(string FailCode)
                      _config->Find("Methods::Mirror::ProblemReporting").c_str());
    }
 }
                      _config->Find("Methods::Mirror::ProblemReporting").c_str());
    }
 }

-
-
-
-// AcqDiffIndex::AcqDiffIndex - Constructor                    
+                                                                       /*}}}*/
+// AcqDiffIndex::AcqDiffIndex - Constructor                            /*{{{*/

 // ---------------------------------------------------------------------
 /* Get the DiffIndex file first and see if there are patches availabe 
  * If so, create a pkgAcqIndexDiffs fetcher that will get and apply the
 // ---------------------------------------------------------------------
 /* Get the DiffIndex file first and see if there are patches availabe 
  * If so, create a pkgAcqIndexDiffs fetcher that will get and apply the


@@ -234,7 +235,7 @@ pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire *Owner,
    QueueURI(Desc);
 
 }
    QueueURI(Desc);
 
 }

-
+                                                                       /*}}}*/

 // AcqIndex::Custom600Headers - Insert custom request headers          /*{{{*/
 // ---------------------------------------------------------------------
 /* The only header we use is the last-modified header. */
 // AcqIndex::Custom600Headers - Insert custom request headers          /*{{{*/
 // ---------------------------------------------------------------------
 /* The only header we use is the last-modified header. */


@@ -252,9 +253,8 @@ string pkgAcqDiffIndex::Custom600Headers()
    
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }
    
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }

-
-
-bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)
+                                                                       /*}}}*/
+bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)             /*{{{*/

 {
    if(Debug)
       std::clog << "pkgAcqIndexDiffs::ParseIndexDiff() " << IndexDiffFile 
 {
    if(Debug)
       std::clog << "pkgAcqIndexDiffs::ParseIndexDiff() " << IndexDiffFile 


@@ -271,19 +271,19 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)
 
    if(TF.Step(Tags) == true)
    {
 
    if(TF.Step(Tags) == true)
    {

-      string local_sha1;

       bool found = false;
       DiffInfo d;
       string size;
 
       bool found = false;
       DiffInfo d;
       string size;
 

-      string tmp = Tags.FindS("SHA1-Current");
+      string const tmp = Tags.FindS("SHA1-Current");

       std::stringstream ss(tmp);
       std::stringstream ss(tmp);

-      ss >> ServerSha1;
+      ss >> ServerSha1 >> size;
+      unsigned long const ServerSize = atol(size.c_str());

 
       FileFd fd(CurrentPackagesFile, FileFd::ReadOnly);
       SHA1Summation SHA1;
       SHA1.AddFD(fd.Fd(), fd.Size());
 
       FileFd fd(CurrentPackagesFile, FileFd::ReadOnly);
       SHA1Summation SHA1;
       SHA1.AddFD(fd.Fd(), fd.Size());

-      local_sha1 = string(SHA1.Result());
+      string const local_sha1 = SHA1.Result();

 
       if(local_sha1 == ServerSha1) 
       {
 
       if(local_sha1 == ServerSha1) 
       {


@@ -297,23 +297,59 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)
       else 
       {
         if(Debug)
       else 
       {
         if(Debug)

-           std::clog << "SHA1-Current: " << ServerSha1 << std::endl;
+           std::clog << "SHA1-Current: " << ServerSha1 << " and we start at "<< fd.Name() << " " << fd.Size() << " " << local_sha1 << std::endl;

 
         // check the historie and see what patches we need
 
         // check the historie and see what patches we need

-        string history = Tags.FindS("SHA1-History");     
+        string const history = Tags.FindS("SHA1-History");

         std::stringstream hist(history);
         std::stringstream hist(history);

-        while(hist >> d.sha1 >> size >> d.file) 
+        while(hist >> d.sha1 >> size >> d.file)

         {
         {

-           d.size = atoi(size.c_str());

            // read until the first match is found
            // read until the first match is found

+           // from that point on, we probably need all diffs

            if(d.sha1 == local_sha1) 
               found=true;
            if(d.sha1 == local_sha1) 
               found=true;

-           // from that point on, we probably need all diffs
-           if(found) 
+           else if (found == false)
+              continue;
+
+           if(Debug)
+              std::clog << "Need to get diff: " << d.file << std::endl;
+           available_patches.push_back(d);
+        }
+
+        if (available_patches.empty() == false)
+        {
+           // patching with too many files is rather slow compared to a fast download
+           unsigned long const fileLimit = _config->FindI("Acquire::PDiffs::FileLimit", 0);
+           if (fileLimit != 0 && fileLimit < available_patches.size())

            {
            {

-              if(Debug)
-                 std::clog << "Need to get diff: " << d.file << std::endl;
-              available_patches.push_back(d);
+              if (Debug)
+                 std::clog << "Need " << available_patches.size() << " diffs (Limit is " << fileLimit
+                       << ") so fallback to complete download" << std::endl;
+              return false;
+           }
+
+           // see if the patches are too big
+           found = false; // it was true and it will be true again at the end
+           d = *available_patches.begin();
+           string const firstPatch = d.file;
+           unsigned long patchesSize = 0;
+           std::stringstream patches(Tags.FindS("SHA1-Patches"));
+           while(patches >> d.sha1 >> size >> d.file)
+           {
+              if (firstPatch == d.file)
+                 found = true;
+              else if (found == false)
+                 continue;
+
+              patchesSize += atol(size.c_str());
+           }
+           unsigned long const sizeLimit = ServerSize * _config->FindI("Acquire::PDiffs::SizeLimit", 100);
+           if (sizeLimit > 0 && (sizeLimit/100) < patchesSize)
+           {
+              if (Debug)
+                 std::clog << "Need " << patchesSize << " bytes (Limit is " << sizeLimit/100
+                       << ") so fallback to complete download" << std::endl;
+              return false;

            }
         }
       }
            }
         }
       }


@@ -322,11 +358,11 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)
       if(found) 
       {
         // queue the diffs
       if(found) 
       {
         // queue the diffs

-        string::size_type last_space = Description.rfind(" ");
+        string::size_type const last_space = Description.rfind(" ");

         if(last_space != string::npos)
            Description.erase(last_space, Description.size()-last_space);
         new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
         if(last_space != string::npos)
            Description.erase(last_space, Description.size()-last_space);
         new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,

-                             ExpectedHash, available_patches);
+                             ExpectedHash, ServerSha1, available_patches);

         Complete = false;
         Status = StatDone;
         Dequeue();
         Complete = false;
         Status = StatDone;
         Dequeue();


@@ -341,8 +377,8 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)
       std::clog << "Can't find a patch in the index file" << std::endl;
    return false;
 }
       std::clog << "Can't find a patch in the index file" << std::endl;
    return false;
 }

-
-void pkgAcqDiffIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
+                                                                       /*}}}*/
+void pkgAcqDiffIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)     /*{{{*/

 {
    if(Debug)
       std::clog << "pkgAcqDiffIndex failed: " << Desc.URI << std::endl
 {
    if(Debug)
       std::clog << "pkgAcqDiffIndex failed: " << Desc.URI << std::endl


@@ -355,8 +391,8 @@ void pkgAcqDiffIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
    Status = StatDone;
    Dequeue();
 }
    Status = StatDone;
    Dequeue();
 }

-
-void pkgAcqDiffIndex::Done(string Message,unsigned long Size,string Md5Hash,
+                                                                       /*}}}*/
+void pkgAcqDiffIndex::Done(string Message,unsigned long Size,string Md5Hash,   /*{{{*/

                           pkgAcquire::MethodConfig *Cnf)
 {
    if(Debug)
                           pkgAcquire::MethodConfig *Cnf)
 {
    if(Debug)


@@ -385,20 +421,19 @@ void pkgAcqDiffIndex::Done(string Message,unsigned long Size,string Md5Hash,
    Dequeue();
    return;
 }
    Dequeue();
    return;
 }

-
-
-
-// AcqIndexDiffs::AcqIndexDiffs - Constructor                  
+                                                                       /*}}}*/
+// AcqIndexDiffs::AcqIndexDiffs - Constructor                          /*{{{*/

 // ---------------------------------------------------------------------
 /* The package diff is added to the queue. one object is constructed
  * for each diff and the index
  */
 pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire *Owner,
                                   string URI,string URIDesc,string ShortDesc,
 // ---------------------------------------------------------------------
 /* The package diff is added to the queue. one object is constructed
  * for each diff and the index
  */
 pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire *Owner,
                                   string URI,string URIDesc,string ShortDesc,

-                                  HashString ExpectedMD5, 
+                                  HashString ExpectedHash, 
+                                  string ServerSha1,

                                   vector<DiffInfo> diffs)
    : Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash), 
                                   vector<DiffInfo> diffs)
    : Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash), 

-     available_patches(diffs)
+     available_patches(diffs), ServerSha1(ServerSha1)

 {
    
    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 {
    
    DestFile = _config->FindDir("Dir::State::lists") + "partial/";


@@ -422,9 +457,8 @@ pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire *Owner,
       QueueNextDiff();
    }
 }
       QueueNextDiff();
    }
 }

-
-
-void pkgAcqIndexDiffs::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
+                                                                       /*}}}*/
+void pkgAcqIndexDiffs::Failed(string Message,pkgAcquire::MethodConfig *Cnf)    /*{{{*/

 {
    if(Debug)
       std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << std::endl
 {
    if(Debug)
       std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << std::endl


@@ -433,9 +467,8 @@ void pkgAcqIndexDiffs::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
                   ExpectedHash);
    Finish();
 }
                   ExpectedHash);
    Finish();
 }

-
-
-// helper that cleans the item out of the fetcher queue
+                                                                       /*}}}*/
+// Finish - helper that cleans the item out of the fetcher queue       /*{{{*/

 void pkgAcqIndexDiffs::Finish(bool allDone)
 {
    // we restore the original name, this is required, otherwise
 void pkgAcqIndexDiffs::Finish(bool allDone)
 {
    // we restore the original name, this is required, otherwise


@@ -470,10 +503,8 @@ void pkgAcqIndexDiffs::Finish(bool allDone)
    Dequeue();
    return;
 }
    Dequeue();
    return;
 }

-
-
-
-bool pkgAcqIndexDiffs::QueueNextDiff()
+                                                                       /*}}}*/
+bool pkgAcqIndexDiffs::QueueNextDiff()                                 /*{{{*/

 {
 
    // calc sha1 of the just patched file
 {
 
    // calc sha1 of the just patched file


@@ -488,6 +519,13 @@ bool pkgAcqIndexDiffs::QueueNextDiff()
       std::clog << "QueueNextDiff: " 
                << FinalFile << " (" << local_sha1 << ")"<<std::endl;
 
       std::clog << "QueueNextDiff: " 
                << FinalFile << " (" << local_sha1 << ")"<<std::endl;
 

+   // final file reached before all patches are applied
+   if(local_sha1 == ServerSha1)
+   {
+      Finish(true);
+      return true;
+   }
+

    // remove all patches until the next matching patch is found
    // this requires the Index file to be ordered
    for(vector<DiffInfo>::iterator I=available_patches.begin();
    // remove all patches until the next matching patch is found
    // this requires the Index file to be ordered
    for(vector<DiffInfo>::iterator I=available_patches.begin();


@@ -519,10 +557,8 @@ bool pkgAcqIndexDiffs::QueueNextDiff()
 
    return true;
 }
 
    return true;
 }

-
-
-
-void pkgAcqIndexDiffs::Done(string Message,unsigned long Size,string Md5Hash,
+                                                                       /*}}}*/
+void pkgAcqIndexDiffs::Done(string Message,unsigned long Size,string Md5Hash,  /*{{{*/

                            pkgAcquire::MethodConfig *Cnf)
 {
    if(Debug)
                            pkgAcquire::MethodConfig *Cnf)
 {
    if(Debug)


@@ -587,14 +623,13 @@ void pkgAcqIndexDiffs::Done(string Message,unsigned long Size,string Md5Hash,
       // see if there is more to download
       if(available_patches.size() > 0) {
         new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
       // see if there is more to download
       if(available_patches.size() > 0) {
         new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,

-                             ExpectedHash, available_patches);
+                             ExpectedHash, ServerSha1, available_patches);

         return Finish();
       } else 
         return Finish(true);
    }
 }
         return Finish();
       } else 
         return Finish(true);
    }
 }

-
-
+                                                                       /*}}}*/

 // AcqIndex::AcqIndex - Constructor                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* The package file is added to the queue and a second class is 
 // AcqIndex::AcqIndex - Constructor                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* The package file is added to the queue and a second class is 


@@ -613,14 +648,15 @@ pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
    if(comprExt.empty()) 
    {
       // autoselect the compression method
    if(comprExt.empty()) 
    {
       // autoselect the compression method

-      if(FileExists("/bin/bzip2")) 
-        CompressionExtension = ".bz2";
-      else 
-        CompressionExtension = ".gz";
-   } else {
-      CompressionExtension = comprExt;
+      std::vector<std::string> types = APT::Configuration::getCompressionTypes();
+      if (types.empty() == true)
+        comprExt = "plain";
+      else
+        comprExt = "." + types[0];

    }
    }

-   Desc.URI = URI + CompressionExtension; 
+   CompressionExtension = ((comprExt == "plain" || comprExt == ".") ? "" : comprExt);
+
+   Desc.URI = URI + CompressionExtension;

 
    Desc.Description = URIDesc;
    Desc.Owner = this;
 
    Desc.Description = URIDesc;
    Desc.Owner = this;


@@ -636,6 +672,8 @@ string pkgAcqIndex::Custom600Headers()
 {
    string Final = _config->FindDir("Dir::State::lists");
    Final += URItoFileName(RealURI);
 {
    string Final = _config->FindDir("Dir::State::lists");
    Final += URItoFileName(RealURI);

+   if (_config->FindB("Acquire::GzipIndexes",false))
+      Final += ".gz";

    
    struct stat Buf;
    if (stat(Final.c_str(),&Buf) != 0)
    
    struct stat Buf;
    if (stat(Final.c_str(),&Buf) != 0)


@@ -643,22 +681,35 @@ string pkgAcqIndex::Custom600Headers()
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }
                                                                        /*}}}*/
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }
                                                                        /*}}}*/

-
-void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
+void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/

 {
 {

-   // no .bz2 found, retry with .gz
-   if(Desc.URI.substr(Desc.URI.size()-3) == "bz2") {
-      Desc.URI = Desc.URI.substr(0,Desc.URI.size()-3) + "gz"; 
+   std::vector<std::string> types = APT::Configuration::getCompressionTypes();
+
+   for (std::vector<std::string>::const_iterator t = types.begin();
+       t != types.end(); t++)
+   {
+      // jump over all already tried compression types
+      const unsigned int nameLen = Desc.URI.size() - (*t).size();
+      if(Desc.URI.substr(nameLen) != *t)
+        continue;
+
+      // we want to try it with the next extension (and make sure to 
+      // not skip over the end)
+      t++;
+      if (t == types.end())
+        break;

 
 

-      // retry with a gzip one 
-      new pkgAcqIndex(Owner, RealURI, Desc.Description,Desc.ShortDesc, 
-                     ExpectedHash, string(".gz"));
+      // queue new download
+      Desc.URI = Desc.URI.substr(0, nameLen) + *t;
+      new pkgAcqIndex(Owner, RealURI, Desc.Description, Desc.ShortDesc,
+      ExpectedHash, string(".").append(*t));
+      

       Status = StatDone;
       Complete = false;
       Dequeue();
       return;
       Status = StatDone;
       Complete = false;
       Dequeue();
       return;

-   } 
-   
+   }
+

    // on decompression failure, remove bad versions in partial/
    if(Decompression && Erase) {
       string s = _config->FindDir("Dir::State::lists") + "partial/";
    // on decompression failure, remove bad versions in partial/
    if(Decompression && Erase) {
       string s = _config->FindDir("Dir::State::lists") + "partial/";


@@ -668,8 +719,7 @@ void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 
    Item::Failed(Message,Cnf);
 }
 
    Item::Failed(Message,Cnf);
 }

-
-
+                                                                       /*}}}*/

 // AcqIndex::Done - Finished a fetch                                   /*{{{*/
 // ---------------------------------------------------------------------
 /* This goes through a number of states.. On the initial fetch the
 // AcqIndex::Done - Finished a fetch                                   /*{{{*/
 // ---------------------------------------------------------------------
 /* This goes through a number of states.. On the initial fetch the


@@ -741,24 +791,46 @@ void pkgAcqIndex::Done(string Message,unsigned long Size,string Hash,
       ErrorText = "Method gave a blank filename";
    }
    
       ErrorText = "Method gave a blank filename";
    }
    

+   string compExt = flExtension(flNotDir(URI(Desc.URI).Path));
+

    // The files timestamp matches
    // The files timestamp matches

-   if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
-   {
-      unlink(FileName.c_str());
+   if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true) {
+       if (_config->FindB("Acquire::GzipIndexes",false) && compExt == "gz")
+         // Update DestFile for .gz suffix so that the clean operation keeps it
+         DestFile += ".gz";

       return;
       return;

-   }
+    }

 
    if (FileName == DestFile)
       Erase = true;
    else
       Local = true;
    
 
    if (FileName == DestFile)
       Erase = true;
    else
       Local = true;
    

-   string compExt = Desc.URI.substr(Desc.URI.size()-3);
-   char *decompProg;
-   if(compExt == "bz2") 
-      decompProg = "bzip2";
-   else if(compExt == ".gz") 
-      decompProg = "gzip";
+   string decompProg;
+
+   // If we enable compressed indexes and already have gzip, keep it
+   if (_config->FindB("Acquire::GzipIndexes",false) && compExt == "gz" && !Local) {
+      string FinalFile = _config->FindDir("Dir::State::lists");
+      FinalFile += URItoFileName(RealURI) + ".gz";
+      Rename(DestFile,FinalFile);
+      chmod(FinalFile.c_str(),0644);
+      
+      // Update DestFile for .gz suffix so that the clean operation keeps it
+      DestFile = _config->FindDir("Dir::State::lists") + "partial/";
+      DestFile += URItoFileName(RealURI) + ".gz";
+      return;
+    }
+
+   // get the binary name for your used compression type
+   decompProg = _config->Find(string("Acquire::CompressionTypes::").append(compExt),"");
+   if(decompProg.empty() == false);
+   // flExtensions returns the full name if no extension is found
+   // this is why we have this complicated compare operation here
+   // FIMXE: add a new flJustExtension() that return "" if no
+   //        extension is found and use that above so that it can
+   //        be tested against ""
+   else if(compExt == flNotDir(URI(Desc.URI).Path))
+      decompProg = "copy";

    else {
       _error->Error("Unsupported extension: %s", compExt.c_str());
       return;
    else {
       _error->Error("Unsupported extension: %s", compExt.c_str());
       return;


@@ -766,11 +838,11 @@ void pkgAcqIndex::Done(string Message,unsigned long Size,string Hash,
 
    Decompression = true;
    DestFile += ".decomp";
 
    Decompression = true;
    DestFile += ".decomp";

-   Desc.URI = string(decompProg) + ":" + FileName;
+   Desc.URI = decompProg + ":" + FileName;

    QueueURI(Desc);
    QueueURI(Desc);

-   Mode = decompProg;
+   Mode = decompProg.c_str();

 }
 }

-
+                                                                       /*}}}*/

 // AcqIndexTrans::pkgAcqIndexTrans - Constructor                       /*{{{*/
 // ---------------------------------------------------------------------
 /* The Translation file is added to the queue */
 // AcqIndexTrans::pkgAcqIndexTrans - Constructor                       /*{{{*/
 // ---------------------------------------------------------------------
 /* The Translation file is added to the queue */


@@ -779,7 +851,19 @@ pkgAcqIndexTrans::pkgAcqIndexTrans(pkgAcquire *Owner,
   : pkgAcqIndex(Owner, URI, URIDesc, ShortDesc, HashString(), "")
 {
 }
   : pkgAcqIndex(Owner, URI, URIDesc, ShortDesc, HashString(), "")
 {
 }

+                                                                       /*}}}*/
+// AcqIndexTrans::Custom600Headers - Insert custom request headers     /*{{{*/
+// ---------------------------------------------------------------------
+string pkgAcqIndexTrans::Custom600Headers()
+{
+   string Final = _config->FindDir("Dir::State::lists");
+   Final += URItoFileName(RealURI);

 
 

+   struct stat Buf;
+   if (stat(Final.c_str(),&Buf) != 0)
+      return "\nFail-Ignore: true";
+   return "\nFail-Ignore: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
+}

                                                                        /*}}}*/
 // AcqIndexTrans::Failed - Silence failure messages for missing files  /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // AcqIndexTrans::Failed - Silence failure messages for missing files  /*{{{*/
 // ---------------------------------------------------------------------


@@ -799,8 +883,7 @@ void pkgAcqIndexTrans::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
    Item::Failed(Message,Cnf);
 }
                                                                        /*}}}*/
    Item::Failed(Message,Cnf);
 }
                                                                        /*}}}*/

-
-pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner,
+pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner,                                /*{{{*/

                             string URI,string URIDesc,string ShortDesc,
                             string MetaIndexURI, string MetaIndexURIDesc,
                             string MetaIndexShortDesc,
                             string URI,string URIDesc,string ShortDesc,
                             string MetaIndexURI, string MetaIndexURIDesc,
                             string MetaIndexShortDesc,


@@ -823,16 +906,19 @@ pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner,
    Desc.Owner = this;
    Desc.ShortDesc = ShortDesc;
    Desc.URI = URI;
    Desc.Owner = this;
    Desc.ShortDesc = ShortDesc;
    Desc.URI = URI;

-   

       
    string Final = _config->FindDir("Dir::State::lists");
    Final += URItoFileName(RealURI);
    struct stat Buf;
    if (stat(Final.c_str(),&Buf) == 0)
    {
       
    string Final = _config->FindDir("Dir::State::lists");
    Final += URItoFileName(RealURI);
    struct stat Buf;
    if (stat(Final.c_str(),&Buf) == 0)
    {

-      // File was already in place.  It needs to be re-verified
-      // because Release might have changed, so Move it into partial
-      Rename(Final,DestFile);
+      // File was already in place.  It needs to be re-downloaded/verified
+      // because Release might have changed, we do give it a differnt
+      // name than DestFile because otherwise the http method will
+      // send If-Range requests and there are too many broken servers
+      // out there that do not understand them
+      LastGoodSig = DestFile+".reverify";
+      Rename(Final,LastGoodSig);

    }
 
    QueueURI(Desc);
    }
 
    QueueURI(Desc);


@@ -844,7 +930,7 @@ pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner,
 string pkgAcqMetaSig::Custom600Headers()
 {
    struct stat Buf;
 string pkgAcqMetaSig::Custom600Headers()
 {
    struct stat Buf;

-   if (stat(DestFile.c_str(),&Buf) != 0)
+   if (stat(LastGoodSig.c_str(),&Buf) != 0)

       return "\nIndex-File: true";
 
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
       return "\nIndex-File: true";
 
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);


@@ -874,13 +960,20 @@ void pkgAcqMetaSig::Done(string Message,unsigned long Size,string MD5,
 
    Complete = true;
 
 
    Complete = true;
 

+   // put the last known good file back on i-m-s hit (it will
+   // be re-verified again)
+   // Else do nothing, we have the new file in DestFile then
+   if(StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
+      Rename(LastGoodSig, DestFile);
+

    // queue a pkgAcqMetaIndex to be verified against the sig we just retrieved
    // queue a pkgAcqMetaIndex to be verified against the sig we just retrieved

-   new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
-                      DestFile, IndexTargets, MetaIndexParser);
+   new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, 
+                      MetaIndexShortDesc,  DestFile, IndexTargets, 
+                      MetaIndexParser);

 
 }
                                                                        /*}}}*/
 
 }
                                                                        /*}}}*/

-void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
+void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)/*{{{*/

 {
    string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
 
 {
    string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
 


@@ -889,8 +982,8 @@ void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
    {
       Item::Failed(Message,Cnf);
       // move the sigfile back on transient network failures 
    {
       Item::Failed(Message,Cnf);
       // move the sigfile back on transient network failures 

-      if(FileExists(DestFile))
-        Rename(DestFile,Final);
+      if(FileExists(LastGoodSig))
+        Rename(LastGoodSig,Final);

 
       // set the status back to , Item::Failed likes to reset it
       Status = pkgAcquire::Item::StatTransientNetworkError;
 
       // set the status back to , Item::Failed likes to reset it
       Status = pkgAcquire::Item::StatTransientNetworkError;


@@ -916,8 +1009,8 @@ void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
    
    Item::Failed(Message,Cnf);
 }
    
    Item::Failed(Message,Cnf);
 }

-
-pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire *Owner,
+                                                                       /*}}}*/
+pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire *Owner,                    /*{{{*/

                                 string URI,string URIDesc,string ShortDesc,
                                 string SigFile,
                                 const vector<struct IndexTarget*>* IndexTargets,
                                 string URI,string URIDesc,string ShortDesc,
                                 string SigFile,
                                 const vector<struct IndexTarget*>* IndexTargets,


@@ -936,7 +1029,6 @@ pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire *Owner,
 
    QueueURI(Desc);
 }
 
    QueueURI(Desc);
 }

-

                                                                        /*}}}*/
 // pkgAcqMetaIndex::Custom600Headers - Insert custom request headers   /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // pkgAcqMetaIndex::Custom600Headers - Insert custom request headers   /*{{{*/
 // ---------------------------------------------------------------------


@@ -952,8 +1044,8 @@ string pkgAcqMetaIndex::Custom600Headers()
    
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }
    
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }

-
-void pkgAcqMetaIndex::Done(string Message,unsigned long Size,string Hash,
+                                                                       /*}}}*/
+void pkgAcqMetaIndex::Done(string Message,unsigned long Size,string Hash,      /*{{{*/

                           pkgAcquire::MethodConfig *Cfg)
 {
    Item::Done(Message,Size,Hash,Cfg);
                           pkgAcquire::MethodConfig *Cfg)
 {
    Item::Done(Message,Size,Hash,Cfg);


@@ -965,6 +1057,9 @@ void pkgAcqMetaIndex::Done(string Message,unsigned long Size,string Hash,
    if (AuthPass == true)
    {
       AuthDone(Message);
    if (AuthPass == true)
    {
       AuthDone(Message);

+
+      // all cool, move Release file into place
+      Complete = true;

    }
    else
    {
    }
    else
    {


@@ -991,11 +1086,21 @@ void pkgAcqMetaIndex::Done(string Message,unsigned long Size,string Hash,
          Desc.URI = "gpgv:" + SigFile;
          QueueURI(Desc);
          Mode = "gpgv";
          Desc.URI = "gpgv:" + SigFile;
          QueueURI(Desc);
          Mode = "gpgv";

+        return;

       }
    }
       }
    }

-}

 
 

-void pkgAcqMetaIndex::RetrievalDone(string Message)
+   if (Complete == true)
+   {
+      string FinalFile = _config->FindDir("Dir::State::lists");
+      FinalFile += URItoFileName(RealURI);
+      Rename(DestFile,FinalFile);
+      chmod(FinalFile.c_str(),0644);
+      DestFile = FinalFile;
+   }
+}
+                                                                       /*}}}*/
+void pkgAcqMetaIndex::RetrievalDone(string Message)                    /*{{{*/

 {
    // We have just finished downloading a Release file (it is not
    // verified yet)
 {
    // We have just finished downloading a Release file (it is not
    // verified yet)


@@ -1016,25 +1121,18 @@ void pkgAcqMetaIndex::RetrievalDone(string Message)
       return;
    }
 
       return;
    }
 

-   // see if the download was a IMSHit
+   // make sure to verify against the right file on I-M-S hit

    IMSHit = StringToBool(LookupTag(Message,"IMS-Hit"),false);
    IMSHit = StringToBool(LookupTag(Message,"IMS-Hit"),false);

+   if(IMSHit)
+   {
+      string FinalFile = _config->FindDir("Dir::State::lists");
+      FinalFile += URItoFileName(RealURI);
+      DestFile = FinalFile;
+   }

    Complete = true;
    Complete = true;

-
-   string FinalFile = _config->FindDir("Dir::State::lists");
-   FinalFile += URItoFileName(RealURI);
-
-   // If we get a IMS hit we can remove the empty file in partial
-   // othersie we move the file in place
-   if (IMSHit)
-      unlink(DestFile.c_str());
-   else
-      Rename(DestFile,FinalFile);
-
-   chmod(FinalFile.c_str(),0644);
-   DestFile = FinalFile;

 }
 }

-
-void pkgAcqMetaIndex::AuthDone(string Message)
+                                                                       /*}}}*/
+void pkgAcqMetaIndex::AuthDone(string Message)                         /*{{{*/

 {
    // At this point, the gpgv method has succeeded, so there is a
    // valid signature from a key in the trusted keyring.  We
 {
    // At this point, the gpgv method has succeeded, so there is a
    // valid signature from a key in the trusted keyring.  We


@@ -1061,14 +1159,13 @@ void pkgAcqMetaIndex::AuthDone(string Message)
    QueueIndexes(true);
 
    // Done, move signature file into position
    QueueIndexes(true);
 
    // Done, move signature file into position

-

    string VerifiedSigFile = _config->FindDir("Dir::State::lists") +
       URItoFileName(RealURI) + ".gpg";
    Rename(SigFile,VerifiedSigFile);
    chmod(VerifiedSigFile.c_str(),0644);
 }
    string VerifiedSigFile = _config->FindDir("Dir::State::lists") +
       URItoFileName(RealURI) + ".gpg";
    Rename(SigFile,VerifiedSigFile);
    chmod(VerifiedSigFile.c_str(),0644);
 }

-
-void pkgAcqMetaIndex::QueueIndexes(bool verify)
+                                                                       /*}}}*/
+void pkgAcqMetaIndex::QueueIndexes(bool verify)                                /*{{{*/

 {
    for (vector <struct IndexTarget*>::const_iterator Target = IndexTargets->begin();
         Target != IndexTargets->end();
 {
    for (vector <struct IndexTarget*>::const_iterator Target = IndexTargets->begin();
         Target != IndexTargets->end();


@@ -1099,19 +1196,22 @@ void pkgAcqMetaIndex::QueueIndexes(bool verify)
             return;
          }
       }
             return;
          }
       }

-      
-      // Queue Packages file (either diff or full packages files, depending
-      // on the users option)
-      if(_config->FindB("Acquire::PDiffs",false) == true) 
+
+      /* Queue Packages file (either diff or full packages files, depending
+         on the users option) - we also check if the PDiff Index file is listed
+         in the Meta-Index file. Ideal would be if pkgAcqDiffIndex would test this
+         instead, but passing the required info to it is to much hassle */
+      if(_config->FindB("Acquire::PDiffs",true) == true && (verify == false ||
+         MetaIndexParser->Exists(string((*Target)->MetaKey).append(".diff/Index")) == true))

         new pkgAcqDiffIndex(Owner, (*Target)->URI, (*Target)->Description,
                             (*Target)->ShortDesc, ExpectedIndexHash);
         new pkgAcqDiffIndex(Owner, (*Target)->URI, (*Target)->Description,
                             (*Target)->ShortDesc, ExpectedIndexHash);

-      else 
+      else

         new pkgAcqIndex(Owner, (*Target)->URI, (*Target)->Description,
                            (*Target)->ShortDesc, ExpectedIndexHash);
    }
 }
         new pkgAcqIndex(Owner, (*Target)->URI, (*Target)->Description,
                            (*Target)->ShortDesc, ExpectedIndexHash);
    }
 }

-
-bool pkgAcqMetaIndex::VerifyVendor(string Message)
+                                                                       /*}}}*/
+bool pkgAcqMetaIndex::VerifyVendor(string Message)                     /*{{{*/

 {
 //    // Maybe this should be made available from above so we don't have
 //    // to read and parse it every time?
 {
 //    // Maybe this should be made available from above so we don't have
 //    // to read and parse it every time?


@@ -1171,6 +1271,17 @@ bool pkgAcqMetaIndex::VerifyVendor(string Message)
       Transformed = "";
    }
 
       Transformed = "";
    }
 

+   if (_config->FindB("Acquire::Check-Valid-Until", true) == true &&
+       MetaIndexParser->GetValidUntil() > 0) {
+      time_t const invalid_since = time(NULL) - MetaIndexParser->GetValidUntil();
+      if (invalid_since > 0)
+        // TRANSLATOR: The first %s is the URL of the bad Release file, the second is
+        // the time since then the file is invalid - formated in the same way as in
+        // the download progress display (e.g. 7d 3h 42min 1s)
+        return _error->Error(_("Release file expired, ignoring %s (invalid since %s)"),
+                             RealURI.c_str(), TimeToStr(invalid_since).c_str());
+   }
+

    if (_config->FindB("Debug::pkgAcquire::Auth", false)) 
    {
       std::cerr << "Got Codename: " << MetaIndexParser->GetDist() << std::endl;
    if (_config->FindB("Debug::pkgAcquire::Auth", false)) 
    {
       std::cerr << "Got Codename: " << MetaIndexParser->GetDist() << std::endl;


@@ -1188,7 +1299,7 @@ bool pkgAcqMetaIndex::VerifyVendor(string Message)
 //       return false;
       if (!Transformed.empty())
       {
 //       return false;
       if (!Transformed.empty())
       {

-         _error->Warning("Conflicting distribution: %s (expected %s but got %s)",
+         _error->Warning(_("Conflicting distribution: %s (expected %s but got %s)"),

                          Desc.Description.c_str(),
                          Transformed.c_str(),
                          MetaIndexParser->GetDist().c_str());
                          Desc.Description.c_str(),
                          Transformed.c_str(),
                          MetaIndexParser->GetDist().c_str());


@@ -1197,49 +1308,45 @@ bool pkgAcqMetaIndex::VerifyVendor(string Message)
 
    return true;
 }
 
    return true;
 }

-                                                                       /*}}}*/
-// pkgAcqMetaIndex::Failed - no Release file present or no signature
-//      file present                                           /*{{{*/
+                                                                       /*}}}*/
+// pkgAcqMetaIndex::Failed - no Release file present or no signature file present      /*{{{*/

 // ---------------------------------------------------------------------
 /* */
 void pkgAcqMetaIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 {
    if (AuthPass == true)
    {
 // ---------------------------------------------------------------------
 /* */
 void pkgAcqMetaIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 {
    if (AuthPass == true)
    {

-      // if we fail the authentication but got the file via a IMS-Hit 
-      // this means that the file wasn't downloaded and that it might be
-      // just stale (server problem, proxy etc). we delete what we have
-      // queue it again without i-m-s 
-      // alternatively we could just unlink the file and let the user try again
-      if (IMSHit)
+      // gpgv method failed, if we have a good signature 
+      string LastGoodSigFile = _config->FindDir("Dir::State::lists") +
+        "partial/" + URItoFileName(RealURI) + ".gpg.reverify";
+      if(FileExists(LastGoodSigFile))

       {
       {

-        Complete = false;
-        Local = false;
-        AuthPass = false;
-        unlink(DestFile.c_str());
-
-        DestFile = _config->FindDir("Dir::State::lists") + "partial/";
-        DestFile += URItoFileName(RealURI);
-        Desc.URI = RealURI;
-        QueueURI(Desc);
+        string VerifiedSigFile = _config->FindDir("Dir::State::lists") +
+           URItoFileName(RealURI) + ".gpg";
+        Rename(LastGoodSigFile,VerifiedSigFile);
+        Status = StatTransientNetworkError;
+        _error->Warning(_("A error occurred during the signature "
+                          "verification. The repository is not updated "
+                          "and the previous index files will be used. "
+                          "GPG error: %s: %s\n"),
+                        Desc.Description.c_str(),
+                        LookupTag(Message,"Message").c_str());
+        RunScripts("APT::Update::Auth-Failure");

         return;
         return;

+      } else {
+        _error->Warning(_("GPG error: %s: %s"),
+                        Desc.Description.c_str(),
+                        LookupTag(Message,"Message").c_str());

       }
       }

-

       // gpgv method failed 
       ReportMirrorFailure("GPGFailure");
       // gpgv method failed 
       ReportMirrorFailure("GPGFailure");

-      _error->Warning("GPG error: %s: %s",
-                      Desc.Description.c_str(),
-                      LookupTag(Message,"Message").c_str());
-

    }
 
    // No Release file was present, or verification failed, so fall
    // back to queueing Packages files without verification
    QueueIndexes(false);
 }
    }
 
    // No Release file was present, or verification failed, so fall
    // back to queueing Packages files without verification
    QueueIndexes(false);
 }

-

                                                                        /*}}}*/
                                                                        /*}}}*/

-

 // AcqArchive::AcqArchive - Constructor                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* This just sets up the initial fetch environment and queues the first
 // AcqArchive::AcqArchive - Constructor                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* This just sets up the initial fetch environment and queues the first


@@ -1325,7 +1432,8 @@ pkgAcqArchive::pkgAcqArchive(pkgAcquire *Owner,pkgSourceList *Sources,
    the archive is already available in the cache and stashs the MD5 for
    checking later. */
 bool pkgAcqArchive::QueueNext()
    the archive is already available in the cache and stashs the MD5 for
    checking later. */
 bool pkgAcqArchive::QueueNext()

-{   
+{
+   string const ForceHash = _config->Find("Acquire::ForceHash");

    for (; Vf.end() == false; Vf++)
    {
       // Ignore not source sources
    for (; Vf.end() == false; Vf++)
    {
       // Ignore not source sources


@@ -1348,12 +1456,25 @@ bool pkgAcqArchive::QueueNext()
         return false;
       
       string PkgFile = Parse.FileName();
         return false;
       
       string PkgFile = Parse.FileName();

-      if(Parse.SHA256Hash() != "")
-        ExpectedHash = HashString("SHA256", Parse.SHA256Hash());
-      else if (Parse.SHA1Hash() != "")
-        ExpectedHash = HashString("SHA1", Parse.SHA1Hash());
-      else 
-        ExpectedHash = HashString("MD5Sum", Parse.MD5Hash());
+      if (ForceHash.empty() == false)
+      {
+        if(stringcasecmp(ForceHash, "sha256") == 0)
+           ExpectedHash = HashString("SHA256", Parse.SHA256Hash());
+        else if (stringcasecmp(ForceHash, "sha1") == 0)
+           ExpectedHash = HashString("SHA1", Parse.SHA1Hash());
+        else
+           ExpectedHash = HashString("MD5Sum", Parse.MD5Hash());
+      }
+      else
+      {
+        string Hash;
+        if ((Hash = Parse.SHA256Hash()).empty() == false)
+           ExpectedHash = HashString("SHA256", Hash);
+        else if ((Hash = Parse.SHA1Hash()).empty() == false)
+           ExpectedHash = HashString("SHA1", Hash);
+        else
+           ExpectedHash = HashString("MD5Sum", Parse.MD5Hash());
+      }

       if (PkgFile.empty() == true)
         return _error->Error(_("The package index files are corrupted. No Filename: "
                              "field for package %s."),
       if (PkgFile.empty() == true)
         return _error->Error(_("The package index files are corrupted. No Filename: "
                              "field for package %s."),


@@ -1522,14 +1643,13 @@ void pkgAcqArchive::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
    }
 }
                                                                        /*}}}*/
    }
 }
                                                                        /*}}}*/

-// AcqArchive::IsTrusted - Determine whether this archive comes from a
-// trusted source                                                      /*{{{*/
+// AcqArchive::IsTrusted - Determine whether this archive comes from a trusted source /*{{{*/

 // ---------------------------------------------------------------------
 bool pkgAcqArchive::IsTrusted()
 {
    return Trusted;
 }
 // ---------------------------------------------------------------------
 bool pkgAcqArchive::IsTrusted()
 {
    return Trusted;
 }

-
+                                                                       /*}}}*/

 // AcqArchive::Finished - Fetching has finished, tidy up               /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // AcqArchive::Finished - Fetching has finished, tidy up               /*{{{*/
 // ---------------------------------------------------------------------
 /* */


@@ -1541,14 +1661,14 @@ void pkgAcqArchive::Finished()
    StoreFilename = string();
 }
                                                                        /*}}}*/
    StoreFilename = string();
 }
                                                                        /*}}}*/

-

 // AcqFile::pkgAcqFile - Constructor                                   /*{{{*/
 // ---------------------------------------------------------------------
 /* The file is added to the queue */
 pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI,string Hash,
                       unsigned long Size,string Dsc,string ShortDesc,
 // AcqFile::pkgAcqFile - Constructor                                   /*{{{*/
 // ---------------------------------------------------------------------
 /* The file is added to the queue */
 pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI,string Hash,
                       unsigned long Size,string Dsc,string ShortDesc,

-                      const string &DestDir, const string &DestFilename) :
-                       Item(Owner), ExpectedHash(Hash)
+                      const string &DestDir, const string &DestFilename,
+                       bool IsIndexFile) :
+                       Item(Owner), ExpectedHash(Hash), IsIndexFile(IsIndexFile)

 {
    Retries = _config->FindI("Acquire::Retries",0);
    
 {
    Retries = _config->FindI("Acquire::Retries",0);
    


@@ -1594,7 +1714,7 @@ void pkgAcqFile::Done(string Message,unsigned long Size,string CalcHash,
    if(!ExpectedHash.empty() && ExpectedHash.toStr() != CalcHash)
    {
       Status = StatError;
    if(!ExpectedHash.empty() && ExpectedHash.toStr() != CalcHash)
    {
       Status = StatError;

-      ErrorText = "Hash Sum mismatch";
+      ErrorText = _("Hash Sum mismatch");

       Rename(DestFile,DestFile + ".FAILED");
       return;
    }
       Rename(DestFile,DestFile + ".FAILED");
       return;
    }


@@ -1663,3 +1783,13 @@ void pkgAcqFile::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
    Item::Failed(Message,Cnf);
 }
                                                                        /*}}}*/
    Item::Failed(Message,Cnf);
 }
                                                                        /*}}}*/

+// AcqIndex::Custom600Headers - Insert custom request headers          /*{{{*/
+// ---------------------------------------------------------------------
+/* The only header we use is the last-modified header. */
+string pkgAcqFile::Custom600Headers()
+{
+   if (IsIndexFile)
+      return "\nIndex-File: true";
+   return "";
+}
+                                                                       /*}}}*/