- change the internal handling of Extensions in pkgAcqIndex
[ntk/apt.git] / apt-pkg / acquire-item.cc
index 94341c8..a603a3d 100644 (file)
@@ -33,6 +33,7 @@
 #include <string>
 #include <sstream>
 #include <stdio.h>
+#include <ctime>
                                                                        /*}}}*/
 
 using namespace std;
@@ -64,6 +65,7 @@ void pkgAcquire::Item::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 {
    Status = StatIdle;
    ErrorText = LookupTag(Message,"Message");
+   UsedMirror =  LookupTag(Message,"UsedMirror");
    if (QueueCounter <= 1)
    {
       /* This indicates that the file is not available right now but might
@@ -76,10 +78,17 @@ void pkgAcquire::Item::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
         Dequeue();
         return;
       }
-      
+
       Status = StatError;
       Dequeue();
    }   
+
+   // report mirror failure back to LP if we actually use a mirror
+   string FailReason = LookupTag(Message, "FailReason");
+   if(FailReason.size() != 0)
+      ReportMirrorFailure(FailReason);
+   else
+      ReportMirrorFailure(ErrorText);
 }
                                                                        /*}}}*/
 // Acquire::Item::Start - Item has begun to download                   /*{{{*/
@@ -101,7 +110,7 @@ void pkgAcquire::Item::Done(string Message,unsigned long Size,string Hash,
 {
    // We just downloaded something..
    string FileName = LookupTag(Message,"Filename");
-   // we only inform the Log class if it was actually not a local thing
+   UsedMirror =  LookupTag(Message,"UsedMirror");
    if (Complete == false && !Local && FileName == DestFile)
    {
       if (Owner->Log != 0)
@@ -110,7 +119,6 @@ void pkgAcquire::Item::Done(string Message,unsigned long Size,string Hash,
 
    if (FileSize == 0)
       FileSize= Size;
-   
    Status = StatDone;
    ErrorText = string();
    Owner->Dequeue(this);
@@ -132,6 +140,50 @@ 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
+   if(UsedMirror.empty())
+      return;
+#if 0
+   std::cerr << "\nReportMirrorFailure: " 
+            << UsedMirror
+            << " Uri: " << DescURI()
+            << " FailCode: " 
+            << FailCode << std::endl;
+#endif
+   const char *Args[40];
+   unsigned int i = 0;
+   string report = _config->Find("Methods::Mirror::ProblemReporting", 
+                                "/usr/lib/apt/apt-report-mirror-failure");
+   if(!FileExists(report))
+      return;
+   Args[i++] = report.c_str();
+   Args[i++] = UsedMirror.c_str();
+   Args[i++] = DescURI().c_str();
+   Args[i++] = FailCode.c_str();
+   Args[i++] = NULL;
+   pid_t pid = ExecFork();
+   if(pid < 0) 
+   {
+      _error->Error("ReportMirrorFailure Fork failed");
+      return;
+   }
+   else if(pid == 0) 
+   {
+      execvp(Args[0], (char**)Args);
+      std::cerr << "Could not exec " << Args[0] << std::endl;
+      _exit(100);
+   }
+   if(!ExecWait(pid, "report-mirror-failure")) 
+   {
+      _error->Warning("Couldn't report problem to '%s'",
+                     _config->Find("Methods::Mirror::ProblemReporting").c_str());
+   }
+}
+                                                                       /*}}}*/
 // AcqDiffIndex::AcqDiffIndex - Constructor                            /*{{{*/
 // ---------------------------------------------------------------------
 /* Get the DiffIndex file first and see if there are patches availabe 
@@ -219,19 +271,19 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)                /*{{{*/
 
    if(TF.Step(Tags) == true)
    {
-      string local_sha1;
       bool found = false;
       DiffInfo d;
       string size;
 
-      string tmp = Tags.FindS("SHA1-Current");
+      string const tmp = Tags.FindS("SHA1-Current");
       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());
-      local_sha1 = string(SHA1.Result());
+      string const local_sha1 = SHA1.Result();
 
       if(local_sha1 == ServerSha1) 
       {
@@ -245,23 +297,59 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)                /*{{{*/
       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
-        string history = Tags.FindS("SHA1-History");     
+        string const history = Tags.FindS("SHA1-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
+           // from that point on, we probably need all diffs
            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 " << 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 to get diff: " << d.file << std::endl;
-              available_patches.push_back(d);
+              if (Debug)
+                 std::clog << "Need " << patchesSize << " bytes (Limit is " << sizeLimit/100
+                       << ") so fallback to complete download" << std::endl;
+              return false;
            }
         }
       }
@@ -270,11 +358,11 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile)                /*{{{*/
       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,
-                             ExpectedHash, available_patches);
+                             ExpectedHash, ServerSha1, available_patches);
         Complete = false;
         Status = StatDone;
         Dequeue();
@@ -342,9 +430,10 @@ void pkgAcqDiffIndex::Done(string Message,unsigned long Size,string Md5Hash,       /*{
 pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire *Owner,
                                   string URI,string URIDesc,string ShortDesc,
                                   HashString ExpectedHash, 
+                                  string ServerSha1,
                                   vector<DiffInfo> diffs)
    : Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash), 
-     available_patches(diffs)
+     available_patches(diffs), ServerSha1(ServerSha1)
 {
    
    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
@@ -430,6 +519,13 @@ bool pkgAcqIndexDiffs::QueueNextDiff()                                     /*{{{*/
       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();
@@ -474,24 +570,7 @@ void pkgAcqIndexDiffs::Done(string Message,unsigned long Size,string Md5Hash,      /*
    FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(RealURI);
 
    // sucess in downloading a diff, enter ApplyDiff state
-   if(State == StateFetchDiff) 
-   {
-
-      if(Debug)
-        std::clog << "Sending to gzip method: " << FinalFile << std::endl;
-
-      string FileName = LookupTag(Message,"Filename");
-      State = StateUnzipDiff;
-      Local = true;
-      Desc.URI = "gzip:" + FileName;
-      DestFile += ".decomp";
-      QueueURI(Desc);
-      Mode = "gzip";
-      return;
-   } 
-
-   // sucess in downloading a diff, enter ApplyDiff state
-   if(State == StateUnzipDiff) 
+   if(State == StateFetchDiff)
    {
 
       // rred excepts the patch as $FinalFile.ed
@@ -527,7 +606,7 @@ 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,
-                             ExpectedHash, available_patches);
+                             ExpectedHash, ServerSha1, available_patches);
         return Finish();
       } else 
         return Finish(true);
@@ -543,29 +622,61 @@ pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
                         HashString ExpectedHash, string comprExt)
    : Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash)
 {
+   if(comprExt.empty() == true)
+   {
+      // autoselect the compression method
+      std::vector<std::string> types = APT::Configuration::getCompressionTypes();
+      for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t)
+        comprExt.append(*t).append(" ");
+      if (comprExt.empty() == false)
+        comprExt.erase(comprExt.end()-1);
+   }
+   CompressionExtension = comprExt;
+
+   Init(URI, URIDesc, ShortDesc);
+}
+pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner, IndexTarget const *Target,
+                        HashString const &ExpectedHash, indexRecords const *MetaIndexParser)
+   : Item(Owner), RealURI(Target->URI), ExpectedHash(ExpectedHash)
+{
+   // autoselect the compression method
+   std::vector<std::string> types = APT::Configuration::getCompressionTypes();
+   CompressionExtension = "";
+   if (ExpectedHash.empty() == false)
+   {
+      for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t)
+        if (*t == "uncompressed" || MetaIndexParser->Exists(string(Target->MetaKey).append(".").append(*t)) == true)
+           CompressionExtension.append(*t).append(" ");
+   }
+   else
+   {
+      for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t)
+        CompressionExtension.append(*t).append(" ");
+   }
+   if (CompressionExtension.empty() == false)
+      CompressionExtension.erase(CompressionExtension.end()-1);
+
+   Init(Target->URI, Target->Description, Target->ShortDesc);
+}
+                                                                       /*}}}*/
+// AcqIndex::Init - defered Constructor                                        /*{{{*/
+void pkgAcqIndex::Init(string const &URI, string const &URIDesc, string const &ShortDesc) {
    Decompression = false;
    Erase = false;
 
    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
    DestFile += URItoFileName(URI);
 
-   if(comprExt.empty()) 
-   {
-      // autoselect the compression method
-      std::vector<std::string> types = APT::Configuration::getCompressionTypes();
-      if (types.empty() == true)
-        comprExt = "plain";
-      else
-        comprExt = "." + types[0];
-   }
-   CompressionExtension = ((comprExt == "plain" || comprExt == ".") ? "" : comprExt);
-
-   Desc.URI = URI + CompressionExtension;
+   std::string const comprExt = CompressionExtension.substr(0, CompressionExtension.find(' '));
+   if (comprExt == "uncompressed")
+      Desc.URI = URI;
+   else
+      Desc.URI = URI + '.' + comprExt;
 
    Desc.Description = URIDesc;
    Desc.Owner = this;
    Desc.ShortDesc = ShortDesc;
-      
+
    QueueURI(Desc);
 }
                                                                        /*}}}*/
@@ -576,47 +687,29 @@ string pkgAcqIndex::Custom600Headers()
 {
    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)
       return "\nIndex-File: true";
-   
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }
                                                                        /*}}}*/
 void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
 {
-   std::vector<std::string> types = APT::Configuration::getCompressionTypes();
-
-   for (std::vector<std::string>::const_iterator t = types.begin();
-       t != types.end(); t++)
+   size_t const nextExt = CompressionExtension.find(' ');
+   if (nextExt != std::string::npos)
    {
-      // 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
-      t++;
-
-      if (t != types.end())
-      {
-        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;
-      }
+      CompressionExtension = CompressionExtension.substr(nextExt+1);
+      Init(RealURI, Desc.Description, Desc.ShortDesc);
+      return;
    }
 
    // on decompression failure, remove bad versions in partial/
-   if(Decompression && Erase) {
+   if (Decompression && Erase) {
       string s = _config->FindDir("Dir::State::lists") + "partial/";
-      s += URItoFileName(RealURI);
+      s.append(URItoFileName(RealURI));
       unlink(s.c_str());
    }
 
@@ -648,6 +741,7 @@ void pkgAcqIndex::Done(string Message,unsigned long Size,string Hash,
          Status = StatAuthError;
          ErrorText = _("Hash Sum mismatch");
          Rename(DestFile,DestFile + ".FAILED");
+        ReportMirrorFailure("HashChecksumFailure");
          return;
       }
       // Done, move it into position
@@ -692,28 +786,41 @@ void pkgAcqIndex::Done(string Message,unsigned long Size,string Hash,
       Status = StatError;
       ErrorText = "Method gave a blank filename";
    }
-   
+
+   std::string const compExt = CompressionExtension.substr(0, CompressionExtension.find(' '));
+
    // The files timestamp matches
-   if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
+   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;
+    }
 
    if (FileName == DestFile)
       Erase = true;
    else
       Local = true;
    
-   string compExt = flExtension(flNotDir(URI(Desc.URI).Path));
    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))
+   else if(compExt == "uncompressed")
       decompProg = "copy";
    else {
       _error->Error("Unsupported extension: %s", compExt.c_str());
@@ -734,6 +841,19 @@ pkgAcqIndexTrans::pkgAcqIndexTrans(pkgAcquire *Owner,
                            string URI,string URIDesc,string ShortDesc) 
   : 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  /*{{{*/
@@ -741,6 +861,15 @@ pkgAcqIndexTrans::pkgAcqIndexTrans(pkgAcquire *Owner,
 /* */
 void pkgAcqIndexTrans::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 {
+   size_t const nextExt = CompressionExtension.find(' ');
+   if (nextExt != std::string::npos)
+   {
+      CompressionExtension = CompressionExtension.substr(nextExt+1);
+      Init(RealURI, Desc.Description, Desc.ShortDesc);
+      Status = StatIdle;
+      return;
+   }
+
    if (Cnf->LocalOnly == true || 
        StringToBool(LookupTag(Message,"Transient-Failure"),false) == false)
    {      
@@ -750,7 +879,7 @@ void pkgAcqIndexTrans::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
       Dequeue();
       return;
    }
-   
+
    Item::Failed(Message,Cnf);
 }
                                                                        /*}}}*/
@@ -838,8 +967,9 @@ void pkgAcqMetaSig::Done(string Message,unsigned long Size,string MD5,
       Rename(LastGoodSig, DestFile);
 
    // 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);
 
 }
                                                                        /*}}}*/
@@ -852,7 +982,7 @@ void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)/*{{{*/
    {
       Item::Failed(Message,Cnf);
       // move the sigfile back on transient network failures 
-      if(FileExists(DestFile))
+      if(FileExists(LastGoodSig))
         Rename(LastGoodSig,Final);
 
       // set the status back to , Item::Failed likes to reset it
@@ -927,6 +1057,9 @@ void pkgAcqMetaIndex::Done(string Message,unsigned long Size,string Hash,  /*{{{*
    if (AuthPass == true)
    {
       AuthDone(Message);
+
+      // all cool, move Release file into place
+      Complete = true;
    }
    else
    {
@@ -953,8 +1086,20 @@ void pkgAcqMetaIndex::Done(string Message,unsigned long Size,string Hash, /*{{{*
          Desc.URI = "gpgv:" + SigFile;
          QueueURI(Desc);
          Mode = "gpgv";
+        return;
       }
    }
+
+   if (Complete == true)
+   {
+      string FinalFile = _config->FindDir("Dir::State::lists");
+      FinalFile += URItoFileName(RealURI);
+      if (SigFile == DestFile)
+        SigFile = FinalFile;
+      Rename(DestFile,FinalFile);
+      chmod(FinalFile.c_str(),0644);
+      DestFile = FinalFile;
+   }
 }
                                                                        /*}}}*/
 void pkgAcqMetaIndex::RetrievalDone(string Message)                    /*{{{*/
@@ -978,22 +1123,17 @@ void pkgAcqMetaIndex::RetrievalDone(string Message)                      /*{{{*/
       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);
+   if(IMSHit)
+   {
+      string FinalFile = _config->FindDir("Dir::State::lists");
+      FinalFile += URItoFileName(RealURI);
+      if (SigFile == DestFile)
+        SigFile = FinalFile;
+      DestFile = FinalFile;
+   }
    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)                         /*{{{*/
@@ -1022,8 +1162,11 @@ void pkgAcqMetaIndex::AuthDone(string Message)                           /*{{{*/
    // Download further indexes with verification
    QueueIndexes(true);
 
-   // Done, move signature file into position
+   // is it a clearsigned MetaIndex file?
+   if (DestFile == SigFile)
+      return;
 
+   // Done, move signature file into position
    string VerifiedSigFile = _config->FindDir("Dir::State::lists") +
       URItoFileName(RealURI) + ".gpg";
    Rename(SigFile,VerifiedSigFile);
@@ -1061,15 +1204,17 @@ void pkgAcqMetaIndex::QueueIndexes(bool verify)                         /*{{{*/
             return;
          }
       }
-      
-      // Queue Packages file (either diff or full packages files, depending
-      // on the users option)
-      if(_config->FindB("Acquire::PDiffs",true) == 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);
-      else 
-        new pkgAcqIndex(Owner, (*Target)->URI, (*Target)->Description,
-                           (*Target)->ShortDesc, ExpectedIndexHash);
+      else
+        new pkgAcqIndex(Owner, *Target, ExpectedIndexHash, MetaIndexParser);
    }
 }
                                                                        /*}}}*/
@@ -1133,6 +1278,17 @@ bool pkgAcqMetaIndex::VerifyVendor(string Message)                       /*{{{*/
       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;
@@ -1150,7 +1306,7 @@ bool pkgAcqMetaIndex::VerifyVendor(string Message)                        /*{{{*/
 //       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());
@@ -1167,30 +1323,37 @@ 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)
-      {
-        Complete = false;
-        Local = false;
-        AuthPass = false;
-        unlink(DestFile.c_str());
+      // gpgv method failed, if we have a good signature 
+      string LastGoodSigFile = _config->FindDir("Dir::State::lists");
+      if (DestFile == SigFile)
+        LastGoodSigFile.append(URItoFileName(RealURI));
+      else
+        LastGoodSigFile.append("partial/").append(URItoFileName(RealURI)).append(".gpg.reverify");
 
-        DestFile = _config->FindDir("Dir::State::lists") + "partial/";
-        DestFile += URItoFileName(RealURI);
-        Desc.URI = RealURI;
-        QueueURI(Desc);
+      if(FileExists(LastGoodSigFile))
+      {
+        if (DestFile != SigFile)
+        {
+           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;
+      } else {
+        _error->Warning(_("GPG error: %s: %s"),
+                        Desc.Description.c_str(),
+                        LookupTag(Message,"Message").c_str());
       }
-
       // gpgv method failed 
-      _error->Warning("GPG error: %s: %s",
-                      Desc.Description.c_str(),
-                      LookupTag(Message,"Message").c_str());
-
+      ReportMirrorFailure("GPGFailure");
    }
 
    // No Release file was present, or verification failed, so fall
@@ -1198,6 +1361,35 @@ void pkgAcqMetaIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
    QueueIndexes(false);
 }
                                                                        /*}}}*/
+pkgAcqMetaClearSig::pkgAcqMetaClearSig(pkgAcquire *Owner,              /*{{{*/
+               string const &URI, string const &URIDesc, string const &ShortDesc,
+               string const &MetaIndexURI, string const &MetaIndexURIDesc, string const &MetaIndexShortDesc,
+               string const &MetaSigURI, string const &MetaSigURIDesc, string const &MetaSigShortDesc,
+               const vector<struct IndexTarget*>* IndexTargets,
+               indexRecords* MetaIndexParser) :
+       pkgAcqMetaIndex(Owner, URI, URIDesc, ShortDesc, "", IndexTargets, MetaIndexParser),
+       MetaIndexURI(MetaIndexURI), MetaIndexURIDesc(MetaIndexURIDesc), MetaIndexShortDesc(MetaIndexShortDesc),
+       MetaSigURI(MetaSigURI), MetaSigURIDesc(MetaSigURIDesc), MetaSigShortDesc(MetaSigShortDesc)
+{
+   SigFile = DestFile;
+}
+                                                                       /*}}}*/
+void pkgAcqMetaClearSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
+{
+   if (AuthPass == false)
+   {
+      new pkgAcqMetaSig(Owner,
+                       MetaSigURI, MetaSigURIDesc, MetaSigShortDesc,
+                       MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
+                       IndexTargets, MetaIndexParser);
+      if (Cnf->LocalOnly == true ||
+         StringToBool(LookupTag(Message, "Transient-Failure"), false) == false)
+        Dequeue();
+   }
+   else
+      pkgAcqMetaIndex::Failed(Message, Cnf);
+}
+                                                                       /*}}}*/
 // AcqArchive::AcqArchive - Constructor                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* This just sets up the initial fetch environment and queues the first
@@ -1283,7 +1475,8 @@ pkgAcqArchive::pkgAcqArchive(pkgAcquire *Owner,pkgSourceList *Sources,
    the archive is already available in the cache and stashs the MD5 for
    checking later. */
 bool pkgAcqArchive::QueueNext()
-{   
+{
+   string const ForceHash = _config->Find("Acquire::ForceHash");
    for (; Vf.end() == false; Vf++)
    {
       // Ignore not source sources
@@ -1306,12 +1499,25 @@ bool pkgAcqArchive::QueueNext()
         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."),
@@ -1503,8 +1709,9 @@ void pkgAcqArchive::Finished()
 /* 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);
    
@@ -1550,7 +1757,7 @@ void pkgAcqFile::Done(string Message,unsigned long Size,string CalcHash,
    if(!ExpectedHash.empty() && ExpectedHash.toStr() != CalcHash)
    {
       Status = StatError;
-      ErrorText = "Hash Sum mismatch";
+      ErrorText = _("Hash Sum mismatch");
       Rename(DestFile,DestFile + ".FAILED");
       return;
    }
@@ -1619,3 +1826,13 @@ void pkgAcqFile::Failed(string Message,pkgAcquire::MethodConfig *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 "";
+}
+                                                                       /*}}}*/