use proper warning for automatic pipeline disable

[apt.git] / methods / server.cc

diff --git a/methods/server.cc b/methods/server.cc
index a2128441cb78a005c108ceddd23c36142872515b..4611433881a4959b3da109ce1e4d2cc2cc00c83c 100644 (file)
--- a/methods/server.cc
+++ b/methods/server.cc
@@ -10,32 +10,26 @@
 // Include Files                                                       /*{{{*/
 #include <config.h>
 
 // Include Files                                                       /*{{{*/
 #include <config.h>
 

-#include <apt-pkg/fileutl.h>
-#include <apt-pkg/acquire-method.h>

 #include <apt-pkg/configuration.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/error.h>

-#include <apt-pkg/hashes.h>
-#include <apt-pkg/netrc.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/strutl.h>

 
 

+#include <ctype.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>

 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/stat.h>
 #include <sys/time.h>

-#include <utime.h>
+#include <time.h>

 #include <unistd.h>
 #include <unistd.h>

-#include <signal.h>
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include <climits>

 #include <iostream>
 #include <iostream>

+#include <limits>

 #include <map>
 #include <map>

+#include <string>
+#include <vector>

 
 

-// Internet stuff
-#include <netdb.h>
-
-#include "config.h"
-#include "connect.h"
-#include "rfc2553emu.h"
-#include "http.h"
+#include "server.h"

 
 #include <apti18n.h>
                                                                        /*}}}*/
 
 #include <apti18n.h>
                                                                        /*}}}*/


@@ -49,7 +43,8 @@ time_t ServerMethod::FailTime = 0;
 // ---------------------------------------------------------------------
 /* Returns 0 if things are OK, 1 if an IO error occurred and 2 if a header
    parse error occurred */
 // ---------------------------------------------------------------------
 /* Returns 0 if things are OK, 1 if an IO error occurred and 2 if a header
    parse error occurred */

-ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File)
+ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File,
+                                                      const std::string &Uri)

 {
    State = Header;
    
 {
    State = Header;
    


@@ -58,7 +53,8 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File)
    Major = 0; 
    Minor = 0; 
    Result = 0; 
    Major = 0; 
    Minor = 0; 
    Result = 0; 

-   Size = 0; 
+   TotalFileSize = 0;
+   JunkSize = 0;

    StartPos = 0;
    Encoding = Closes;
    HaveContent = false;
    StartPos = 0;
    Encoding = Closes;
    HaveContent = false;


@@ -71,7 +67,7 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File)
         continue;
 
       if (Owner->Debug == true)
         continue;
 
       if (Owner->Debug == true)

-        clog << Data;
+        clog << "Answer for: " << Uri << endl << Data;

       
       for (string::const_iterator I = Data.begin(); I < Data.end(); ++I)
       {
       
       for (string::const_iterator I = Data.begin(); I < Data.end(); ++I)
       {


@@ -86,7 +82,7 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File)
       if (Result == 100)
         continue;
       
       if (Result == 100)
         continue;
       

-      // Tidy up the connection persistance state.
+      // Tidy up the connection persistence state.

       if (Encoding == Closes && HaveContent == true)
         Persistent = false;
       
       if (Encoding == Closes && HaveContent == true)
         Persistent = false;
       


@@ -117,12 +113,12 @@ bool ServerState::HeaderLine(string Line)
 
    // Parse off any trailing spaces between the : and the next word.
    string::size_type Pos2 = Pos;
 
    // Parse off any trailing spaces between the : and the next word.
    string::size_type Pos2 = Pos;

-   while (Pos2 < Line.length() && isspace(Line[Pos2]) != 0)
+   while (Pos2 < Line.length() && isspace_ascii(Line[Pos2]) != 0)

       Pos2++;
       Pos2++;

-      
+

    string Tag = string(Line,0,Pos);
    string Val = string(Line,Pos2);
    string Tag = string(Line,0,Pos);
    string Val = string(Line,Pos2);

-   
+

    if (stringcasecmp(Tag.c_str(),Tag.c_str()+4,"HTTP") == 0)
    {
       // Evil servers return no version
    if (stringcasecmp(Tag.c_str(),Tag.c_str()+4,"HTTP") == 0)
    {
       // Evil servers return no version


@@ -132,8 +128,8 @@ bool ServerState::HeaderLine(string Line)
         if (elements == 3)
         {
            Code[0] = '\0';
         if (elements == 3)
         {
            Code[0] = '\0';

-           if (Owner->Debug == true)
-              clog << "HTTP server doesn't give Reason-Phrase for " << Result << std::endl;
+           if (Owner != NULL && Owner->Debug == true)
+              clog << "HTTP server doesn't give Reason-Phrase for " << std::to_string(Result) << std::endl;

         }
         else if (elements != 4)
            return _error->Error(_("The HTTP server sent an invalid reply header"));
         }
         else if (elements != 4)
            return _error->Error(_("The HTTP server sent an invalid reply header"));


@@ -146,36 +142,49 @@ bool ServerState::HeaderLine(string Line)
            return _error->Error(_("The HTTP server sent an invalid reply header"));
       }
 
            return _error->Error(_("The HTTP server sent an invalid reply header"));
       }
 

-      /* Check the HTTP response header to get the default persistance
+      /* Check the HTTP response header to get the default persistence

          state. */
       if (Major < 1)
         Persistent = false;
       else
       {
         if (Major == 1 && Minor == 0)
          state. */
       if (Major < 1)
         Persistent = false;
       else
       {
         if (Major == 1 && Minor == 0)

+        {

            Persistent = false;
            Persistent = false;

+        }

         else
         else

+        {

            Persistent = true;
            Persistent = true;

+           if (PipelineAllowed)
+              Pipeline = true;
+        }

       }
 
       return true;
       }
 
       return true;

-   }      
-      
+   }
+

    if (stringcasecmp(Tag,"Content-Length:") == 0)
    {
       if (Encoding == Closes)
         Encoding = Stream;
       HaveContent = true;
    if (stringcasecmp(Tag,"Content-Length:") == 0)
    {
       if (Encoding == Closes)
         Encoding = Stream;
       HaveContent = true;

-      
-      // The length is already set from the Content-Range header
-      if (StartPos != 0)
-        return true;

 
 

-      Size = strtoull(Val.c_str(), NULL, 10);
-      if (Size >= std::numeric_limits<unsigned long long>::max())
+      unsigned long long * DownloadSizePtr = &DownloadSize;
+      if (Result == 416)
+        DownloadSizePtr = &JunkSize;
+
+      *DownloadSizePtr = strtoull(Val.c_str(), NULL, 10);
+      if (*DownloadSizePtr >= std::numeric_limits<unsigned long long>::max())

         return _error->Errno("HeaderLine", _("The HTTP server sent an invalid Content-Length header"));
         return _error->Errno("HeaderLine", _("The HTTP server sent an invalid Content-Length header"));

-      else if (Size == 0)
+      else if (*DownloadSizePtr == 0)

         HaveContent = false;
         HaveContent = false;

+
+      // On partial content (206) the Content-Length less than the real
+      // size, so do not set it here but leave that to the Content-Range
+      // header instead
+      if(Result != 206 && TotalFileSize == 0)
+         TotalFileSize = DownloadSize;
+

       return true;
    }
 
       return true;
    }
 


@@ -184,29 +193,29 @@ bool ServerState::HeaderLine(string Line)
       HaveContent = true;
       return true;
    }
       HaveContent = true;
       return true;
    }

-   
+

    if (stringcasecmp(Tag,"Content-Range:") == 0)
    {
       HaveContent = true;
 
       // §14.16 says 'byte-range-resp-spec' should be a '*' in case of 416
    if (stringcasecmp(Tag,"Content-Range:") == 0)
    {
       HaveContent = true;
 
       // §14.16 says 'byte-range-resp-spec' should be a '*' in case of 416

-      if (Result == 416 && sscanf(Val.c_str(), "bytes */%llu",&Size) == 1)
-      {
-        StartPos = 1; // ignore Content-Length, it would override Size
-        HaveContent = false;
-      }
-      else if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&Size) != 2)
+      if (Result == 416 && sscanf(Val.c_str(), "bytes */%llu",&TotalFileSize) == 1)
+        ; // we got the expected filesize which is all we wanted
+      else if (sscanf(Val.c_str(),"bytes %llu-%*u/%llu",&StartPos,&TotalFileSize) != 2)

         return _error->Error(_("The HTTP server sent an invalid Content-Range header"));
         return _error->Error(_("The HTTP server sent an invalid Content-Range header"));

-      if ((unsigned long long)StartPos > Size)
+      if ((unsigned long long)StartPos > TotalFileSize)

         return _error->Error(_("This HTTP server has broken range support"));
         return _error->Error(_("This HTTP server has broken range support"));

+
+      // figure out what we will download
+      DownloadSize = TotalFileSize - StartPos;

       return true;
    }
       return true;
    }

-   
+

    if (stringcasecmp(Tag,"Transfer-Encoding:") == 0)
    {
       HaveContent = true;
       if (stringcasecmp(Val,"chunked") == 0)
    if (stringcasecmp(Tag,"Transfer-Encoding:") == 0)
    {
       HaveContent = true;
       if (stringcasecmp(Val,"chunked") == 0)

-        Encoding = Chunked;      
+        Encoding = Chunked;

       return true;
    }
 
       return true;
    }
 


@@ -218,7 +227,7 @@ bool ServerState::HeaderLine(string Line)
         Persistent = true;
       return true;
    }
         Persistent = true;
       return true;
    }

-   
+

    if (stringcasecmp(Tag,"Last-Modified:") == 0)
    {
       if (RFC1123StrToTime(Val.c_str(), Date) == false)
    if (stringcasecmp(Tag,"Last-Modified:") == 0)
    {
       if (RFC1123StrToTime(Val.c_str(), Date) == false)


@@ -236,15 +245,16 @@ bool ServerState::HeaderLine(string Line)
 }
                                                                        /*}}}*/
 // ServerState::ServerState - Constructor                              /*{{{*/
 }
                                                                        /*}}}*/
 // ServerState::ServerState - Constructor                              /*{{{*/

-ServerState::ServerState(URI Srv, ServerMethod *Owner) : ServerName(Srv), TimeOut(120), Owner(Owner)
+ServerState::ServerState(URI Srv, ServerMethod *Owner) :
+   DownloadSize(0), ServerName(Srv), TimeOut(120), Owner(Owner)

 {
    Reset();
 }
                                                                        /*}}}*/
 {
    Reset();
 }
                                                                        /*}}}*/

-
-bool ServerMethod::Configuration(string Message)                       /*{{{*/
+bool ServerState::AddPartialFileToHashes(FileFd &File)                 /*{{{*/

 {
 {

-   return pkgAcqMethod::Configuration(Message);
+   File.Truncate(StartPos);
+   return GetHashes()->AddFD(File, StartPos);

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


@@ -259,12 +269,12 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
    // Not Modified
    if (Server->Result == 304)
    {
    // Not Modified
    if (Server->Result == 304)
    {

-      unlink(Queue->DestFile.c_str());
+      RemoveFile("server", Queue->DestFile);

       Res.IMSHit = true;
       Res.LastModified = Queue->LastModified;
       return IMS_HIT;
    }
       Res.IMSHit = true;
       Res.LastModified = Queue->LastModified;
       return IMS_HIT;
    }

-   
+

    /* Redirect
     *
     * Note that it is only OK for us to treat all redirection the same
    /* Redirect
     *
     * Note that it is only OK for us to treat all redirection the same


@@ -291,11 +301,15 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
       }
       else
       {
       }
       else
       {

-         NextURI = DeQuoteString(Server->Location);
-         URI tmpURI = NextURI;
-         // Do not allow a redirection to switch protocol
-         if (tmpURI.Access == "http")
-            return TRY_AGAIN_OR_REDIRECT;
+        NextURI = DeQuoteString(Server->Location);
+        URI tmpURI = NextURI;
+        URI Uri = Queue->Uri;
+        // same protocol redirects are okay
+        if (tmpURI.Access == Uri.Access)
+           return TRY_AGAIN_OR_REDIRECT;
+        // as well as http to https
+        else if (Uri.Access == "http" && tmpURI.Access == "https")
+           return TRY_AGAIN_OR_REDIRECT;

       }
       /* else pass through for error message */
    }
       }
       /* else pass through for error message */
    }


@@ -305,14 +319,33 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
       struct stat SBuf;
       if (stat(Queue->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
       {
       struct stat SBuf;
       if (stat(Queue->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
       {

-        if ((unsigned long long)SBuf.st_size == Server->Size)
+        bool partialHit = false;
+        if (Queue->ExpectedHashes.usable() == true)
+        {
+           Hashes resultHashes(Queue->ExpectedHashes);
+           FileFd file(Queue->DestFile, FileFd::ReadOnly);
+           Server->TotalFileSize = file.FileSize();
+           Server->Date = file.ModificationTime();
+           resultHashes.AddFD(file);
+           HashStringList const hashList = resultHashes.GetHashStringList();
+           partialHit = (Queue->ExpectedHashes == hashList);
+        }
+        else if ((unsigned long long)SBuf.st_size == Server->TotalFileSize)
+           partialHit = true;
+        if (partialHit == true)

         {
            // the file is completely downloaded, but was not moved
         {
            // the file is completely downloaded, but was not moved

-           Server->StartPos = Server->Size;
-           Server->Result = 200;
+           if (Server->HaveContent == true)
+           {
+              // Send to error page to dev/null
+              FileFd DevNull("/dev/null",FileFd::WriteExists);
+              Server->RunData(&DevNull);
+           }

            Server->HaveContent = false;
            Server->HaveContent = false;

+           Server->StartPos = Server->TotalFileSize;
+           Server->Result = 200;

         }
         }

-        else if (unlink(Queue->DestFile.c_str()) == 0)
+        else if (RemoveFile("server", Queue->DestFile))

         {
            NextURI = Queue->Uri;
            return TRY_AGAIN_OR_REDIRECT;
         {
            NextURI = Queue->Uri;
            return TRY_AGAIN_OR_REDIRECT;


@@ -320,14 +353,14 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
       }
    }
 
       }
    }
 

-   /* We have a reply we dont handle. This should indicate a perm server
+   /* We have a reply we don't handle. This should indicate a perm server

       failure */
    if (Server->Result < 200 || Server->Result >= 300)
    {
       failure */
    if (Server->Result < 200 || Server->Result >= 300)
    {

-      char err[255];
-      snprintf(err,sizeof(err)-1,"HttpError%i",Server->Result);
+      std::string err;
+      strprintf(err, "HttpError%u", Server->Result);

       SetFailReason(err);
       SetFailReason(err);

-      _error->Error("%u %s",Server->Result,Server->Code);
+      _error->Error("%u %s", Server->Result, Server->Code);

       if (Server->HaveContent == true)
         return ERROR_WITH_CONTENT_PAGE;
       return ERROR_UNRECOVERABLE;
       if (Server->HaveContent == true)
         return ERROR_WITH_CONTENT_PAGE;
       return ERROR_UNRECOVERABLE;


@@ -335,7 +368,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
 
    // This is some sort of 2xx 'data follows' reply
    Res.LastModified = Server->Date;
 
    // This is some sort of 2xx 'data follows' reply
    Res.LastModified = Server->Date;

-   Res.Size = Server->Size;
+   Res.Size = Server->TotalFileSize;

    
    // Open the file
    delete File;
    
    // Open the file
    delete File;


@@ -344,11 +377,11 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
       return ERROR_NOT_FROM_SERVER;
 
    FailFile = Queue->DestFile;
       return ERROR_NOT_FROM_SERVER;
 
    FailFile = Queue->DestFile;

-   FailFile.c_str();   // Make sure we dont do a malloc in the signal handler
+   FailFile.c_str();   // Make sure we don't do a malloc in the signal handler

    FailFd = File->Fd();
    FailTime = Server->Date;
 
    FailFd = File->Fd();
    FailTime = Server->Date;
 

-   if (Server->InitHashes(*File) == false)
+   if (Server->InitHashes(Queue->ExpectedHashes) == false || Server->AddPartialFileToHashes(*File) == false)

    {
       _error->Errno("read",_("Problem hashing file"));
       return ERROR_NOT_FROM_SERVER;
    {
       _error->Errno("read",_("Problem hashing file"));
       return ERROR_NOT_FROM_SERVER;


@@ -362,20 +395,20 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
                                                                        /*}}}*/
 // ServerMethod::SigTerm - Handle a fatal signal                       /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // ServerMethod::SigTerm - Handle a fatal signal                       /*{{{*/
 // ---------------------------------------------------------------------

-/* This closes and timestamps the open file. This is neccessary to get
+/* This closes and timestamps the open file. This is necessary to get

    resume behavoir on user abort */
 void ServerMethod::SigTerm(int)
 {
    if (FailFd == -1)
       _exit(100);
    resume behavoir on user abort */
 void ServerMethod::SigTerm(int)
 {
    if (FailFd == -1)
       _exit(100);

+
+   struct timeval times[2];
+   times[0].tv_sec = FailTime;
+   times[1].tv_sec = FailTime;
+   times[0].tv_usec = times[1].tv_usec = 0;
+   utimes(FailFile.c_str(), times);

    close(FailFd);
    close(FailFd);

-   
-   // Timestamp
-   struct utimbuf UBuf;
-   UBuf.actime = FailTime;
-   UBuf.modtime = FailTime;
-   utime(FailFile.c_str(),&UBuf);
-   
+

    _exit(100);
 }
                                                                        /*}}}*/
    _exit(100);
 }
                                                                        /*}}}*/


@@ -385,31 +418,68 @@ void ServerMethod::SigTerm(int)
    depth. */
 bool ServerMethod::Fetch(FetchItem *)
 {
    depth. */
 bool ServerMethod::Fetch(FetchItem *)
 {

-   if (Server == 0)
+   if (Server == nullptr || QueueBack == nullptr)

       return true;
 
       return true;
 

-   // Queue the requests
-   int Depth = -1;
-   for (FetchItem *I = Queue; I != 0 && Depth < (signed)PipelineDepth; 
-       I = I->Next, Depth++)
-   {
-      // If pipelining is disabled, we only queue 1 request
-      if (Server->Pipeline == false && Depth >= 0)
-        break;
-      
+   // If pipelining is disabled, we only queue 1 request
+   auto const AllowedDepth = Server->Pipeline ? PipelineDepth : 0;
+   // how deep is our pipeline currently?
+   decltype(PipelineDepth) CurrentDepth = 0;
+   for (FetchItem const *I = Queue; I != QueueBack; I = I->Next)
+      ++CurrentDepth;
+
+   do {

       // Make sure we stick with the same server
       // Make sure we stick with the same server

-      if (Server->Comp(I->Uri) == false)
+      if (Server->Comp(QueueBack->Uri) == false)

         break;
         break;

-      if (QueueBack == I)
+
+      bool const UsableHashes = QueueBack->ExpectedHashes.usable();
+      // if we have no hashes, do at most one such request
+      // as we can't fixup pipeling misbehaviors otherwise
+      if (CurrentDepth != 0 && UsableHashes == false)
+        break;
+
+      if (UsableHashes && FileExists(QueueBack->DestFile))

       {
       {

-        QueueBack = I->Next;
-        SendReq(I);
-        continue;
+        FileFd partial(QueueBack->DestFile, FileFd::ReadOnly);
+        Hashes wehave(QueueBack->ExpectedHashes);
+        if (QueueBack->ExpectedHashes.FileSize() == partial.FileSize())
+        {
+           if (wehave.AddFD(partial) &&
+                 wehave.GetHashStringList() == QueueBack->ExpectedHashes)
+           {
+              FetchResult Res;
+              Res.Filename = QueueBack->DestFile;
+              Res.ResumePoint = QueueBack->ExpectedHashes.FileSize();
+              URIStart(Res);
+              // move item to the start of the queue as URIDone will
+              // always dequeued the first item in the queue
+              if (Queue != QueueBack)
+              {
+                 FetchItem *Prev = Queue;
+                 for (; Prev->Next != QueueBack; Prev = Prev->Next)
+                    /* look for the previous queue item */;
+                 Prev->Next = QueueBack->Next;
+                 QueueBack->Next = Queue;
+                 Queue = QueueBack;
+                 QueueBack = Prev->Next;
+              }
+              Res.TakeHashes(wehave);
+              URIDone(Res);
+              continue;
+           }
+           else
+              RemoveFile("Fetch-Partial", QueueBack->DestFile);
+        }

       }
       }

-   }
-   
+      auto const Tmp = QueueBack;
+      QueueBack = QueueBack->Next;
+      SendReq(Tmp);
+      ++CurrentDepth;
+   } while (CurrentDepth <= AllowedDepth && QueueBack != nullptr);
+

    return true;
    return true;

-};
+}

                                                                        /*}}}*/
 // ServerMethod::Loop - Main loop                                      /*{{{*/
 int ServerMethod::Loop()
                                                                        /*}}}*/
 // ServerMethod::Loop - Main loop                                      /*{{{*/
 int ServerMethod::Loop()


@@ -450,10 +520,8 @@ int ServerMethod::Loop()
       
       // Connect to the server
       if (Server == 0 || Server->Comp(Queue->Uri) == false)
       
       // Connect to the server
       if (Server == 0 || Server->Comp(Queue->Uri) == false)

-      {
-        delete Server;

         Server = CreateServerState(Queue->Uri);
         Server = CreateServerState(Queue->Uri);

-      }
+

       /* If the server has explicitly said this is the last connection
          then we pre-emptively shut down the pipeline and tear down 
         the connection. This will speed up HTTP/1.0 servers a tad
       /* If the server has explicitly said this is the last connection
          then we pre-emptively shut down the pipeline and tear down 
         the connection. This will speed up HTTP/1.0 servers a tad


@@ -470,8 +538,7 @@ int ServerMethod::Loop()
       if (Server->Open() == false)
       {
         Fail(true);
       if (Server->Open() == false)
       {
         Fail(true);

-        delete Server;
-        Server = 0;
+        Server = nullptr;

         continue;
       }
 
         continue;
       }
 


@@ -479,7 +546,7 @@ int ServerMethod::Loop()
       Fetch(0);
       
       // Fetch the next URL header data from the server.
       Fetch(0);
       
       // Fetch the next URL header data from the server.

-      switch (Server->RunHeaders(File))
+      switch (Server->RunHeaders(File, Queue->Uri))

       {
         case ServerState::RUN_HEADERS_OK:
         break;
       {
         case ServerState::RUN_HEADERS_OK:
         break;


@@ -489,6 +556,7 @@ int ServerMethod::Loop()
         {
            _error->Error(_("Bad header data"));
            Fail(true);
         {
            _error->Error(_("Bad header data"));
            Fail(true);

+           Server->Close();

            RotateDNS();
            continue;
         }
            RotateDNS();
            continue;
         }


@@ -501,6 +569,7 @@ int ServerMethod::Loop()
            _error->Discard();
            Server->Close();
            Server->Pipeline = false;
            _error->Discard();
            Server->Close();
            Server->Pipeline = false;

+           Server->PipelineAllowed = false;

            
            if (FailCounter >= 2)
            {
            
            if (FailCounter >= 2)
            {


@@ -525,6 +594,13 @@ int ServerMethod::Loop()
 
            // Run the data
            bool Result = true;
 
            // Run the data
            bool Result = true;

+
+            // ensure we don't fetch too much
+            // we could do "Server->MaximumSize = Queue->MaximumSize" here
+            // but that would break the clever pipeline messup detection
+            // so instead we use the size of the biggest item in the queue
+            Server->MaximumSize = FindMaximumObjectSizeInQueue();
+

             if (Server->HaveContent)
               Result = Server->RunData(File);
 
             if (Server->HaveContent)
               Result = Server->RunData(File);
 


@@ -539,16 +615,44 @@ int ServerMethod::Loop()
            File = 0;
            
            // Timestamp
            File = 0;
            
            // Timestamp

-           struct utimbuf UBuf;
-           time(&UBuf.actime);
-           UBuf.actime = Server->Date;
-           UBuf.modtime = Server->Date;
-           utime(Queue->DestFile.c_str(),&UBuf);
+           struct timeval times[2];
+           times[0].tv_sec = times[1].tv_sec = Server->Date;
+           times[0].tv_usec = times[1].tv_usec = 0;
+           utimes(Queue->DestFile.c_str(), times);

 
            // Send status to APT
            if (Result == true)
            {
 
            // Send status to APT
            if (Result == true)
            {

-              Res.TakeHashes(*Server->GetHashes());
+              Hashes * const resultHashes = Server->GetHashes();
+              HashStringList const hashList = resultHashes->GetHashStringList();
+              if (PipelineDepth != 0 && Queue->ExpectedHashes.usable() == true && Queue->ExpectedHashes != hashList)
+              {
+                 // we did not get the expected hash… mhhh:
+                 // could it be that server/proxy messed up pipelining?
+                 FetchItem * BeforeI = Queue;
+                 for (FetchItem *I = Queue->Next; I != 0 && I != QueueBack; I = I->Next)
+                 {
+                    if (I->ExpectedHashes.usable() == true && I->ExpectedHashes == hashList)
+                    {
+                       // yes, he did! Disable pipelining and rewrite queue
+                       if (Server->Pipeline == true)
+                       {
+                          Warning(_("Automatically disabled %s due to incorrect response from server/proxy. (man 5 apt.conf)"), "Acquire::http::Pipeline-Depth");
+                          Server->Pipeline = false;
+                          Server->PipelineAllowed = false;
+                          // we keep the PipelineDepth value so that the rest of the queue can be fixed up as well
+                       }
+                       Rename(Res.Filename, I->DestFile);
+                       Res.Filename = I->DestFile;
+                       BeforeI->Next = I->Next;
+                       I->Next = Queue;
+                       Queue = I;
+                       break;
+                    }
+                    BeforeI = I;
+                 }
+              }
+              Res.TakeHashes(*resultHashes);

               URIDone(Res);
            }
            else
               URIDone(Res);
            }
            else


@@ -568,7 +672,10 @@ int ServerMethod::Loop()
                  QueueBack = Queue;
               }
               else
                  QueueBack = Queue;
               }
               else

+               {
+                  Server->Close();

                  Fail(true);
                  Fail(true);

+               }

            }
            break;
         }
            }
            break;
         }


@@ -663,3 +770,17 @@ int ServerMethod::Loop()
    return 0;
 }
                                                                        /*}}}*/
    return 0;
 }
                                                                        /*}}}*/

+unsigned long long ServerMethod::FindMaximumObjectSizeInQueue() const  /*{{{*/
+{
+   unsigned long long MaxSizeInQueue = 0;
+   for (FetchItem *I = Queue; I != 0 && I != QueueBack; I = I->Next)
+      MaxSizeInQueue = std::max(MaxSizeInQueue, I->MaximumSize);
+   return MaxSizeInQueue;
+}
+                                                                       /*}}}*/
+ServerMethod::ServerMethod(char const * const Binary, char const * const Ver,unsigned long const Flags) :/*{{{*/
+   aptMethod(Binary, Ver, Flags), Server(nullptr), File(NULL), PipelineDepth(10),
+   AllowRedirect(false), Debug(false)
+{
+}
+                                                                       /*}}}*/