avoid triggering the c++11 erase api change on travis

[apt.git] / methods / server.cc

diff --git a/methods/server.cc b/methods/server.cc
index cef8097384526b5f430480196971a854ef45c44d..1c42c69c28486639e1328569cd8f1727cf7cc32b 100644 (file)
--- a/methods/server.cc
+++ b/methods/server.cc
@@ -54,7 +54,8 @@ ServerState::RunHeadersResult ServerState::RunHeaders(FileFd * const File,
    Major = 0; 
    Minor = 0; 
    Result = 0; 
-   Size = 0; 
+   TotalFileSize = 0;
+   JunkSize = 0;
    StartPos = 0;
    Encoding = Closes;
    HaveContent = false;
@@ -128,7 +129,7 @@ bool ServerState::HeaderLine(string Line)
         if (elements == 3)
         {
            Code[0] = '\0';
-           if (Owner->Debug == true)
+           if (Owner != NULL && Owner->Debug == true)
               clog << "HTTP server doesn't give Reason-Phrase for " << Result << std::endl;
         }
         else if (elements != 4)
@@ -163,15 +164,22 @@ bool ServerState::HeaderLine(string Line)
         Encoding = Stream;
       HaveContent = true;
 
-      // The length is already set from the Content-Range header
-      if (StartPos != 0)
-        return true;
+      unsigned long long * DownloadSizePtr = &DownloadSize;
+      if (Result == 416)
+        DownloadSizePtr = &JunkSize;
 
-      Size = strtoull(Val.c_str(), NULL, 10);
-      if (Size >= std::numeric_limits<unsigned long long>::max())
+      *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"));
-      else if (Size == 0)
+      else if (*DownloadSizePtr == 0)
         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;
    }
 
@@ -186,15 +194,15 @@ bool ServerState::HeaderLine(string Line)
       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"));
-      if ((unsigned long long)StartPos > Size)
+      if ((unsigned long long)StartPos > TotalFileSize)
         return _error->Error(_("This HTTP server has broken range support"));
+
+      // figure out what we will download
+      DownloadSize = TotalFileSize - StartPos;
       return true;
    }
 
@@ -237,10 +245,21 @@ ServerState::ServerState(URI Srv, ServerMethod *Owner) : ServerName(Srv), TimeOu
    Reset();
 }
                                                                        /*}}}*/
+bool ServerState::AddPartialFileToHashes(FileFd &File)                 /*{{{*/
+{
+   File.Truncate(StartPos);
+   return GetHashes()->AddFD(File, StartPos);
+}
+                                                                       /*}}}*/
 
 bool ServerMethod::Configuration(string Message)                       /*{{{*/
 {
-   return pkgAcqMethod::Configuration(Message);
+   if (pkgAcqMethod::Configuration(Message) == false)
+      return false;
+
+   DropPrivsOrDie();
+
+   return true;
 }
                                                                        /*}}}*/
 
@@ -260,7 +279,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
       Res.LastModified = Queue->LastModified;
       return IMS_HIT;
    }
-   
+
    /* Redirect
     *
     * Note that it is only OK for us to treat all redirection the same
@@ -305,12 +324,31 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
       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
-           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->StartPos = Server->TotalFileSize;
+           Server->Result = 200;
         }
         else if (unlink(Queue->DestFile.c_str()) == 0)
         {
@@ -320,7 +358,7 @@ 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)
    {
@@ -335,7 +373,7 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
 
    // 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;
@@ -344,11 +382,11 @@ ServerMethod::DealWithHeaders(FetchResult &Res)
       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;
 
-   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;
@@ -715,7 +753,7 @@ unsigned long long
 ServerMethod::FindMaximumObjectSizeInQueue() const 
 {
    unsigned long long MaxSizeInQueue = 0;
-   for (FetchItem *I = Queue->Next; I != 0 && I != QueueBack; I = I->Next)
+   for (FetchItem *I = Queue; I != 0 && I != QueueBack; I = I->Next)
       MaxSizeInQueue = std::max(MaxSizeInQueue, I->MaximumSize);
    return MaxSizeInQueue;
 }