more explicit MarkRequired algorithm code

[apt.git] / methods / http.cc

diff --git a/methods/http.cc b/methods/http.cc
index 5f0dc03d91142f3c880e6538a6d7f675548a3512..fc54ece3ad2c42155d458ded77d991964751fd66 100644 (file)
--- a/methods/http.cc
+++ b/methods/http.cc
@@ -3,7 +3,7 @@
 // $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
 /* ######################################################################
 
 // $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
 /* ######################################################################
 

-   HTTP Acquire Method - This is the HTTP aquire method for APT.
+   HTTP Acquire Method - This is the HTTP acquire method for APT.

    
    It uses HTTP/1.1 and many of the fancy options there-in, such as
    pipelining, range, if-range and so on. 
    
    It uses HTTP/1.1 and many of the fancy options there-in, such as
    pipelining, range, if-range and so on. 


@@ -28,54 +28,43 @@
 #include <config.h>
 
 #include <apt-pkg/fileutl.h>
 #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/hashes.h>
 #include <apt-pkg/netrc.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/hashes.h>
 #include <apt-pkg/netrc.h>

+#include <apt-pkg/strutl.h>
+#include <apt-pkg/proxy.h>

 
 

+#include <stddef.h>
+#include <stdlib.h>
+#include <sys/select.h>
+#include <cstring>

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

-#include <utime.h>

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

-#include <signal.h>

 #include <stdio.h>
 #include <errno.h>
 #include <stdio.h>
 #include <errno.h>

-#include <string.h>
-#include <climits>

 #include <iostream>
 #include <iostream>

-#include <map>
-
-// Internet stuff
-#include <netdb.h>
+#include <sstream>

 
 #include "config.h"
 #include "connect.h"
 
 #include "config.h"
 #include "connect.h"

-#include "rfc2553emu.h"

 #include "http.h"
 
 #include <apti18n.h>
                                                                        /*}}}*/
 using namespace std;
 
 #include "http.h"
 
 #include <apti18n.h>
                                                                        /*}}}*/
 using namespace std;
 

-string HttpMethod::FailFile;
-int HttpMethod::FailFd = -1;
-time_t HttpMethod::FailTime = 0;
-unsigned long PipelineDepth = 0;
-unsigned long TimeOut = 120;
-bool AllowRedirect = false;
-bool Debug = false;
-URI Proxy;
-

 unsigned long long CircleBuf::BwReadLimit=0;
 unsigned long long CircleBuf::BwTickReadData=0;
 struct timeval CircleBuf::BwReadTick={0,0};
 const unsigned int CircleBuf::BW_HZ=10;
 unsigned long long CircleBuf::BwReadLimit=0;
 unsigned long long CircleBuf::BwTickReadData=0;
 struct timeval CircleBuf::BwReadTick={0,0};
 const unsigned int CircleBuf::BW_HZ=10;

- 
+

 // CircleBuf::CircleBuf - Circular input buffer                                /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // CircleBuf::CircleBuf - Circular input buffer                                /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-CircleBuf::CircleBuf(unsigned long long Size) : Size(Size), Hash(0)
+CircleBuf::CircleBuf(unsigned long long Size)
+   : Size(Size), Hash(NULL), TotalWriten(0)

 {
    Buf = new unsigned char[Size];
    Reset();
 {
    Buf = new unsigned char[Size];
    Reset();


@@ -91,14 +80,15 @@ void CircleBuf::Reset()
    InP = 0;
    OutP = 0;
    StrPos = 0;
    InP = 0;
    OutP = 0;
    StrPos = 0;

+   TotalWriten = 0;

    MaxGet = (unsigned long long)-1;
    OutQueue = string();
    MaxGet = (unsigned long long)-1;
    OutQueue = string();

-   if (Hash != 0)
+   if (Hash != NULL)

    {
       delete Hash;
    {
       delete Hash;

-      Hash = new Hashes;
-   }   
-};
+      Hash = NULL;
+   }
+}

                                                                        /*}}}*/
 // CircleBuf::Read - Read from a FD into the circular buffer           /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // CircleBuf::Read - Read from a FD into the circular buffer           /*{{{*/
 // ---------------------------------------------------------------------


@@ -106,8 +96,6 @@ void CircleBuf::Reset()
    is non-blocking.. */
 bool CircleBuf::Read(int Fd)
 {
    is non-blocking.. */
 bool CircleBuf::Read(int Fd)
 {

-   unsigned long long BwReadMax;
-

    while (1)
    {
       // Woops, buffer is full
    while (1)
    {
       // Woops, buffer is full


@@ -115,7 +103,7 @@ bool CircleBuf::Read(int Fd)
         return true;
 
       // what's left to read in this tick
         return true;
 
       // what's left to read in this tick

-      BwReadMax = CircleBuf::BwReadLimit/BW_HZ;
+      unsigned long long const BwReadMax = CircleBuf::BwReadLimit/BW_HZ;

 
       if(CircleBuf::BwReadLimit) {
         struct timeval now;
 
       if(CircleBuf::BwReadLimit) {
         struct timeval now;


@@ -230,8 +218,10 @@ bool CircleBuf::Write(int Fd)
         
         return false;
       }
         
         return false;
       }

+
+      TotalWriten += Res;

       
       

-      if (Hash != 0)
+      if (Hash != NULL)

         Hash->Add(Buf + (OutP%Size),Res);
       
       OutP += Res;
         Hash->Add(Buf + (OutP%Size),Res);
       
       OutP += Res;


@@ -296,20 +286,17 @@ CircleBuf::~CircleBuf()
    delete Hash;
 }
 
    delete Hash;
 }
 

-// ServerState::ServerState - Constructor                              /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-ServerState::ServerState(URI Srv,HttpMethod *Owner) : Owner(Owner),
-                        In(64*1024), Out(4*1024),
-                        ServerName(Srv)
+// HttpServerState::HttpServerState - Constructor                      /*{{{*/
+HttpServerState::HttpServerState(URI Srv,HttpMethod *Owner) : ServerState(Srv, Owner), In(64*1024), Out(4*1024)

 {
 {

+   TimeOut = _config->FindI("Acquire::http::Timeout",TimeOut);

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

-// ServerState::Open - Open a connection to the server                 /*{{{*/
+// HttpServerState::Open - Open a connection to the server             /*{{{*/

 // ---------------------------------------------------------------------
 /* This opens a connection to the server. */
 // ---------------------------------------------------------------------
 /* This opens a connection to the server. */

-bool ServerState::Open()
+bool HttpServerState::Open()

 {
    // Use the already open connection if possible.
    if (ServerFd != -1)
 {
    // Use the already open connection if possible.
    if (ServerFd != -1)


@@ -321,6 +308,7 @@ bool ServerState::Open()
    Persistent = true;
    
    // Determine the proxy setting
    Persistent = true;
    
    // Determine the proxy setting

+   AutoDetectProxy(ServerName);

    string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
    if (!SpecificProxy.empty())
    {
    string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
    if (!SpecificProxy.empty())
    {


@@ -373,72 +361,18 @@ bool ServerState::Open()
    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/

-// ServerState::Close - Close a connection to the server               /*{{{*/
+// HttpServerState::Close - Close a connection to the server           /*{{{*/

 // ---------------------------------------------------------------------
 /* */
 // ---------------------------------------------------------------------
 /* */

-bool ServerState::Close()
+bool HttpServerState::Close()

 {
    close(ServerFd);
    ServerFd = -1;
    return true;
 }
                                                                        /*}}}*/
 {
    close(ServerFd);
    ServerFd = -1;
    return true;
 }
                                                                        /*}}}*/

-// ServerState::RunHeaders - Get the headers before the data           /*{{{*/
-// ---------------------------------------------------------------------
-/* Returns 0 if things are OK, 1 if an IO error occurred and 2 if a header
-   parse error occurred */
-ServerState::RunHeadersResult ServerState::RunHeaders()
-{
-   State = Header;
-   
-   Owner->Status(_("Waiting for headers"));
-
-   Major = 0; 
-   Minor = 0; 
-   Result = 0; 
-   Size = 0; 
-   StartPos = 0;
-   Encoding = Closes;
-   HaveContent = false;
-   time(&Date);
-
-   do
-   {
-      string Data;
-      if (In.WriteTillEl(Data) == false)
-        continue;
-
-      if (Debug == true)
-        clog << Data;
-      
-      for (string::const_iterator I = Data.begin(); I < Data.end(); ++I)
-      {
-        string::const_iterator J = I;
-        for (; J != Data.end() && *J != '\n' && *J != '\r'; ++J);
-        if (HeaderLine(string(I,J)) == false)
-           return RUN_HEADERS_PARSE_ERROR;
-        I = J;
-      }
-
-      // 100 Continue is a Nop...
-      if (Result == 100)
-        continue;
-      
-      // Tidy up the connection persistance state.
-      if (Encoding == Closes && HaveContent == true)
-        Persistent = false;
-      
-      return RUN_HEADERS_OK;
-   }
-   while (Owner->Go(false,this) == true);
-   
-   return RUN_HEADERS_IO_ERROR;
-}
-                                                                       /*}}}*/
-// ServerState::RunData - Transfer the data from the socket            /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool ServerState::RunData()
+// HttpServerState::RunData - Transfer the data from the socket                /*{{{*/
+bool HttpServerState::RunData(FileFd * const File)

 {
    State = Data;
    
 {
    State = Data;
    


@@ -456,7 +390,7 @@ bool ServerState::RunData()
            if (In.WriteTillEl(Data,true) == true)
               break;
         }
            if (In.WriteTillEl(Data,true) == true)
               break;
         }

-        while ((Last = Owner->Go(false,this)) == true);
+        while ((Last = Go(false, File)) == true);

 
         if (Last == false)
            return false;
 
         if (Last == false)
            return false;


@@ -474,7 +408,7 @@ bool ServerState::RunData()
               if (In.WriteTillEl(Data,true) == true && Data.length() <= 2)
                  break;
            }
               if (In.WriteTillEl(Data,true) == true && Data.length() <= 2)
                  break;
            }

-           while ((Last = Owner->Go(false,this)) == true);
+           while ((Last = Go(false, File)) == true);

            if (Last == false)
               return false;
            return !_error->PendingError();
            if (Last == false)
               return false;
            return !_error->PendingError();


@@ -482,7 +416,7 @@ bool ServerState::RunData()
         
         // Transfer the block
         In.Limit(Len);
         
         // Transfer the block
         In.Limit(Len);

-        while (Owner->Go(true,this) == true)
+        while (Go(true, File) == true)

            if (In.IsLimit() == true)
               break;
         
            if (In.IsLimit() == true)
               break;
         


@@ -498,7 +432,7 @@ bool ServerState::RunData()
            if (In.WriteTillEl(Data,true) == true)
               break;
         }
            if (In.WriteTillEl(Data,true) == true)
               break;
         }

-        while ((Last = Owner->Go(false,this)) == true);
+        while ((Last = Go(false, File)) == true);

         if (Last == false)
            return false;
       }
         if (Last == false)
            return false;
       }


@@ -507,10 +441,12 @@ bool ServerState::RunData()
    {
       /* Closes encoding is used when the server did not specify a size, the
          loss of the connection means we are done */
    {
       /* Closes encoding is used when the server did not specify a size, the
          loss of the connection means we are done */

-      if (Encoding == Closes)
+      if (JunkSize != 0)
+        In.Limit(JunkSize);
+      else if (DownloadSize != 0)
+        In.Limit(DownloadSize);
+      else if (Persistent == false)

         In.Limit(-1);
         In.Limit(-1);

-      else
-        In.Limit(Size - StartPos);

       
       // Just transfer the whole block.
       do
       
       // Just transfer the whole block.
       do


@@ -521,275 +457,131 @@ bool ServerState::RunData()
         In.Limit(-1);
         return !_error->PendingError();
       }
         In.Limit(-1);
         return !_error->PendingError();
       }

-      while (Owner->Go(true,this) == true);
+      while (Go(true, File) == true);

    }
 
    }
 

-   return Owner->Flush(this) && !_error->PendingError();
+   return Owner->Flush() && !_error->PendingError();

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

-// ServerState::HeaderLine - Process a header line                     /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool ServerState::HeaderLine(string Line)
+bool HttpServerState::ReadHeaderLines(std::string &Data)               /*{{{*/

 {
 {

-   if (Line.empty() == true)
-      return true;
+   return In.WriteTillEl(Data);
+}
+                                                                       /*}}}*/
+bool HttpServerState::LoadNextResponse(bool const ToFile, FileFd * const File)/*{{{*/
+{
+   return Go(ToFile, File);
+}
+                                                                       /*}}}*/
+bool HttpServerState::WriteResponse(const std::string &Data)           /*{{{*/
+{
+   return Out.Read(Data);
+}
+                                                                       /*}}}*/
+APT_PURE bool HttpServerState::IsOpen()                                        /*{{{*/
+{
+   return (ServerFd != -1);
+}
+                                                                       /*}}}*/
+bool HttpServerState::InitHashes(HashStringList const &ExpectedHashes) /*{{{*/
+{
+   delete In.Hash;
+   In.Hash = new Hashes(ExpectedHashes);
+   return true;
+}
+                                                                       /*}}}*/

 
 

-   string::size_type Pos = Line.find(' ');
-   if (Pos == string::npos || Pos+1 > Line.length())
-   {
-      // Blah, some servers use "connection:closes", evil.
-      Pos = Line.find(':');
-      if (Pos == string::npos || Pos + 2 > Line.length())
-        return _error->Error(_("Bad header line"));
-      Pos++;
-   }
+APT_PURE Hashes * HttpServerState::GetHashes()                         /*{{{*/
+{
+   return In.Hash;
+}
+                                                                       /*}}}*/
+// HttpServerState::Die - The server has closed the connection.                /*{{{*/
+bool HttpServerState::Die(FileFd &File)
+{
+   unsigned int LErrno = errno;

 
 

-   // Parse off any trailing spaces between the : and the next word.
-   string::size_type Pos2 = Pos;
-   while (Pos2 < Line.length() && isspace(Line[Pos2]) != 0)
-      Pos2++;
-      
-   string Tag = string(Line,0,Pos);
-   string Val = string(Line,Pos2);
-   
-   if (stringcasecmp(Tag.c_str(),Tag.c_str()+4,"HTTP") == 0)
+   // Dump the buffer to the file
+   if (State == ServerState::Data)

    {
    {

-      // Evil servers return no version
-      if (Line[4] == '/')
-      {
-        int const elements = sscanf(Line.c_str(),"HTTP/%3u.%3u %3u%359[^\n]",&Major,&Minor,&Result,Code);
-        if (elements == 3)
-        {
-           Code[0] = '\0';
-           if (Debug == true)
-              clog << "HTTP server doesn't give Reason-Phrase for " << Result << std::endl;
-        }
-        else if (elements != 4)
-           return _error->Error(_("The HTTP server sent an invalid reply header"));
-      }
-      else
+      // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking
+      // can't be set
+      if (File.Name() != "/dev/null")
+        SetNonBlock(File.Fd(),false);
+      while (In.WriteSpace() == true)

       {
       {

-        Major = 0;
-        Minor = 9;
-        if (sscanf(Line.c_str(),"HTTP %3u%359[^\n]",&Result,Code) != 2)
-           return _error->Error(_("The HTTP server sent an invalid reply header"));
-      }
+        if (In.Write(File.Fd()) == false)
+           return _error->Errno("write",_("Error writing to the file"));

 
 

-      /* Check the HTTP response header to get the default persistance
-         state. */
-      if (Major < 1)
-        Persistent = false;
-      else
-      {
-        if (Major == 1 && Minor == 0)
-           Persistent = false;
-        else
-           Persistent = true;
+        // Done
+        if (In.IsLimit() == true)
+           return true;

       }
       }

-
-      return 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())
-        return _error->Errno("HeaderLine", _("The HTTP server sent an invalid Content-Length header"));
-      else if (Size == 0)
-        HaveContent = false;
-      return true;

    }
 
    }
 

-   if (stringcasecmp(Tag,"Content-Type:") == 0)
-   {
-      HaveContent = true;
-      return true;
-   }
-   
-   if (stringcasecmp(Tag,"Content-Range:") == 0)
+   // See if this is because the server finished the data stream
+   if (In.IsLimit() == false && State != HttpServerState::Header &&
+       Persistent == true)

    {
    {

-      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)
-        return _error->Error(_("The HTTP server sent an invalid Content-Range header"));
-      if ((unsigned long long)StartPos > Size)
-        return _error->Error(_("This HTTP server has broken range support"));
-      return true;
+      Close();
+      if (LErrno == 0)
+        return _error->Error(_("Error reading from server. Remote end closed connection"));
+      errno = LErrno;
+      return _error->Errno("read",_("Error reading from server"));

    }
    }

-   
-   if (stringcasecmp(Tag,"Transfer-Encoding:") == 0)
+   else

    {
    {

-      HaveContent = true;
-      if (stringcasecmp(Val,"chunked") == 0)
-        Encoding = Chunked;      
-      return true;
-   }
+      In.Limit(-1);

 
 

-   if (stringcasecmp(Tag,"Connection:") == 0)
-   {
-      if (stringcasecmp(Val,"close") == 0)
-        Persistent = false;
-      if (stringcasecmp(Val,"keep-alive") == 0)
-        Persistent = true;
-      return true;
-   }
-   
-   if (stringcasecmp(Tag,"Last-Modified:") == 0)
-   {
-      if (RFC1123StrToTime(Val.c_str(), Date) == false)
-        return _error->Error(_("Unknown date format"));
-      return true;
-   }
+      // Nothing left in the buffer
+      if (In.WriteSpace() == false)
+        return false;

 
 

-   if (stringcasecmp(Tag,"Location:") == 0)
-   {
-      Location = Val;
+      // We may have got multiple responses back in one packet..
+      Close();

       return true;
    }
 
       return true;
    }
 

-   return true;
+   return false;

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

-
-// HttpMethod::SendReq - Send the HTTP request                         /*{{{*/
+// HttpServerState::Flush - Dump the buffer into the file              /*{{{*/

 // ---------------------------------------------------------------------
 // ---------------------------------------------------------------------

-/* This places the http request in the outbound buffer */
-void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
+/* This takes the current input buffer from the Server FD and writes it
+   into the file */
+bool HttpServerState::Flush(FileFd * const File)

 {
 {

-   URI Uri = Itm->Uri;
-
-   // The HTTP server expects a hostname with a trailing :port
-   char Buf[1000];
-   string ProperHost;
-
-   if (Uri.Host.find(':') != string::npos)
-      ProperHost = '[' + Uri.Host + ']';
-   else
-      ProperHost = Uri.Host;
-   if (Uri.Port != 0)
+   if (File != NULL)

    {
    {

-      sprintf(Buf,":%u",Uri.Port);
-      ProperHost += Buf;
-   }   
+      // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking
+      // can't be set
+      if (File->Name() != "/dev/null")
+        SetNonBlock(File->Fd(),false);
+      if (In.WriteSpace() == false)
+        return true;

       
       

-   // Just in case.
-   if (Itm->Uri.length() >= sizeof(Buf))
-       abort();
-
-   /* RFC 2616 §5.1.2 requires absolute URIs for requests to proxies,
-      but while its a must for all servers to accept absolute URIs,
-      it is assumed clients will sent an absolute path for non-proxies */
-   std::string requesturi;
-   if (Proxy.empty() == true || Proxy.Host.empty())
-      requesturi = Uri.Path;
-   else
-      requesturi = Itm->Uri;
-
-   // The "+" is encoded as a workaround for a amazon S3 bug
-   // see LP bugs #1003633 and #1086997.
-   requesturi = QuoteString(requesturi, "+~ ");
-
-   /* Build the request. No keep-alive is included as it is the default
-      in 1.1, can cause problems with proxies, and we are an HTTP/1.1
-      client anyway.
-      C.f. https://tools.ietf.org/wg/httpbis/trac/ticket/158 */
-   sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\n",
-          requesturi.c_str(),ProperHost.c_str());
-
-   // generate a cache control header (if needed)
-   if (_config->FindB("Acquire::http::No-Cache",false) == true) 
-   {
-      strcat(Buf,"Cache-Control: no-cache\r\nPragma: no-cache\r\n");
-   }
-   else
-   {
-      if (Itm->IndexFile == true) 
+      while (In.WriteSpace() == true)

       {
       {

-        sprintf(Buf+strlen(Buf),"Cache-Control: max-age=%u\r\n",
-                _config->FindI("Acquire::http::Max-Age",0));
-      }
-      else
-      {
-        if (_config->FindB("Acquire::http::No-Store",false) == true)
-           strcat(Buf,"Cache-Control: no-store\r\n");
-      }
-   }
-
-   // If we ask for uncompressed files servers might respond with content-
-   // negotation which lets us end up with compressed files we do not support,
-   // see 657029, 657560 and co, so if we have no extension on the request
-   // ask for text only. As a sidenote: If there is nothing to negotate servers
-   // seem to be nice and ignore it.
-   if (_config->FindB("Acquire::http::SendAccept", true) == true)
-   {
-      size_t const filepos = Itm->Uri.find_last_of('/');
-      string const file = Itm->Uri.substr(filepos + 1);
-      if (flExtension(file) == file)
-        strcat(Buf,"Accept: text/*\r\n");
-   }
-
-   string Req = Buf;
-
-   // Check for a partial file
-   struct stat SBuf;
-   if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
-   {
-      // In this case we send an if-range query with a range header
-      sprintf(Buf,"Range: bytes=%lli-\r\nIf-Range: %s\r\n",(long long)SBuf.st_size,
-             TimeRFC1123(SBuf.st_mtime).c_str());
-      Req += Buf;
-   }
-   else
-   {
-      if (Itm->LastModified != 0)
-      {
-        sprintf(Buf,"If-Modified-Since: %s\r\n",TimeRFC1123(Itm->LastModified).c_str());
-        Req += Buf;
+        if (In.Write(File->Fd()) == false)
+           return _error->Errno("write",_("Error writing to file"));
+        if (In.IsLimit() == true)
+           return true;

       }
       }

-   }
-
-   if (Proxy.User.empty() == false || Proxy.Password.empty() == false)
-      Req += string("Proxy-Authorization: Basic ") + 
-          Base64Encode(Proxy.User + ":" + Proxy.Password) + "\r\n";

 
 

-   maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
-   if (Uri.User.empty() == false || Uri.Password.empty() == false)
-   {
-      Req += string("Authorization: Basic ") + 
-          Base64Encode(Uri.User + ":" + Uri.Password) + "\r\n";
+      if (In.IsLimit() == true || Persistent == false)
+        return true;

    }
    }

-   Req += "User-Agent: " + _config->Find("Acquire::http::User-Agent",
-               "Debian APT-HTTP/1.3 (" PACKAGE_VERSION ")") + "\r\n\r\n";
-   
-   if (Debug == true)
-      cerr << Req << endl;
-
-   Out.Read(Req);
+   return false;

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

-// HttpMethod::Go - Run a single loop                                  /*{{{*/
+// HttpServerState::Go - Run a single loop                             /*{{{*/

 // ---------------------------------------------------------------------
 /* This runs the select loop over the server FDs, Output file FDs and
    stdin. */
 // ---------------------------------------------------------------------
 /* This runs the select loop over the server FDs, Output file FDs and
    stdin. */

-bool HttpMethod::Go(bool ToFile,ServerState *Srv)
+bool HttpServerState::Go(bool ToFile, FileFd * const File)

 {
    // Server has closed the connection
 {
    // Server has closed the connection

-   if (Srv->ServerFd == -1 && (Srv->In.WriteSpace() == false || 
+   if (ServerFd == -1 && (In.WriteSpace() == false || 

                               ToFile == false))
       return false;
    
                               ToFile == false))
       return false;
    


@@ -799,18 +591,18 @@ bool HttpMethod::Go(bool ToFile,ServerState *Srv)
    
    /* Add the server. We only send more requests if the connection will 
       be persisting */
    
    /* Add the server. We only send more requests if the connection will 
       be persisting */

-   if (Srv->Out.WriteSpace() == true && Srv->ServerFd != -1 
-       && Srv->Persistent == true)
-      FD_SET(Srv->ServerFd,&wfds);
-   if (Srv->In.ReadSpace() == true && Srv->ServerFd != -1)
-      FD_SET(Srv->ServerFd,&rfds);
+   if (Out.WriteSpace() == true && ServerFd != -1 
+       && Persistent == true)
+      FD_SET(ServerFd,&wfds);
+   if (In.ReadSpace() == true && ServerFd != -1)
+      FD_SET(ServerFd,&rfds);

    
    // Add the file
    int FileFD = -1;
    
    // Add the file
    int FileFD = -1;

-   if (File != 0)
+   if (File != NULL)

       FileFD = File->Fd();
    
       FileFD = File->Fd();
    

-   if (Srv->In.WriteSpace() == true && ToFile == true && FileFD != -1)
+   if (In.WriteSpace() == true && ToFile == true && FileFD != -1)

       FD_SET(FileFD,&wfds);
 
    // Add stdin
       FD_SET(FileFD,&wfds);
 
    // Add stdin


@@ -819,8 +611,8 @@ bool HttpMethod::Go(bool ToFile,ServerState *Srv)
          
    // Figure out the max fd
    int MaxFd = FileFD;
          
    // Figure out the max fd
    int MaxFd = FileFD;

-   if (MaxFd < Srv->ServerFd)
-      MaxFd = Srv->ServerFd;
+   if (MaxFd < ServerFd)
+      MaxFd = ServerFd;

 
    // Select
    struct timeval tv;
 
    // Select
    struct timeval tv;


@@ -837,618 +629,161 @@ bool HttpMethod::Go(bool ToFile,ServerState *Srv)
    if (Res == 0)
    {
       _error->Error(_("Connection timed out"));
    if (Res == 0)
    {
       _error->Error(_("Connection timed out"));

-      return ServerDie(Srv);
+      return Die(*File);

    }
    
    // Handle server IO
    }
    
    // Handle server IO

-   if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&rfds))
+   if (ServerFd != -1 && FD_ISSET(ServerFd,&rfds))

    {
       errno = 0;
    {
       errno = 0;

-      if (Srv->In.Read(Srv->ServerFd) == false)
-        return ServerDie(Srv);
+      if (In.Read(ServerFd) == false)
+        return Die(*File);

    }
         
    }
         

-   if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&wfds))
+   if (ServerFd != -1 && FD_ISSET(ServerFd,&wfds))

    {
       errno = 0;
    {
       errno = 0;

-      if (Srv->Out.Write(Srv->ServerFd) == false)
-        return ServerDie(Srv);
+      if (Out.Write(ServerFd) == false)
+        return Die(*File);

    }
 
    // Send data to the file
    if (FileFD != -1 && FD_ISSET(FileFD,&wfds))
    {
    }
 
    // Send data to the file
    if (FileFD != -1 && FD_ISSET(FileFD,&wfds))
    {

-      if (Srv->In.Write(FileFD) == false)
+      if (In.Write(FileFD) == false)

         return _error->Errno("write",_("Error writing to output file"));
    }
 
         return _error->Errno("write",_("Error writing to output file"));
    }
 

+   if (MaximumSize > 0 && File && File->Tell() > MaximumSize)
+   {
+      Owner->SetFailReason("MaximumSizeExceeded");
+      return _error->Error("Writing more data than expected (%llu > %llu)",
+                           File->Tell(), MaximumSize);
+   }
+

    // Handle commands from APT
    if (FD_ISSET(STDIN_FILENO,&rfds))
    {
    // Handle commands from APT
    if (FD_ISSET(STDIN_FILENO,&rfds))
    {

-      if (Run(true) != -1)
+      if (Owner->Run(true) != -1)

         exit(100);
    }   
        
    return true;
 }
                                                                        /*}}}*/
         exit(100);
    }   
        
    return true;
 }
                                                                        /*}}}*/

-// HttpMethod::Flush - Dump the buffer into the file                   /*{{{*/
-// ---------------------------------------------------------------------
-/* This takes the current input buffer from the Server FD and writes it
-   into the file */
-bool HttpMethod::Flush(ServerState *Srv)
-{
-   if (File != 0)
-   {
-      // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking
-      // can't be set
-      if (File->Name() != "/dev/null")
-        SetNonBlock(File->Fd(),false);
-      if (Srv->In.WriteSpace() == false)
-        return true;
-      
-      while (Srv->In.WriteSpace() == true)
-      {
-        if (Srv->In.Write(File->Fd()) == false)
-           return _error->Errno("write",_("Error writing to file"));
-        if (Srv->In.IsLimit() == true)
-           return true;
-      }

 
 

-      if (Srv->In.IsLimit() == true || Srv->Encoding == ServerState::Closes)
-        return true;
-   }
-   return false;
-}
-                                                                       /*}}}*/
-// HttpMethod::ServerDie - The server has closed the connection.       /*{{{*/
+// HttpMethod::SendReq - Send the HTTP request                         /*{{{*/

 // ---------------------------------------------------------------------
 // ---------------------------------------------------------------------

-/* */
-bool HttpMethod::ServerDie(ServerState *Srv)
+/* This places the http request in the outbound buffer */
+void HttpMethod::SendReq(FetchItem *Itm)

 {
 {

-   unsigned int LErrno = errno;
-   
-   // Dump the buffer to the file
-   if (Srv->State == ServerState::Data)
-   {
-      // on GNU/kFreeBSD, apt dies on /dev/null because non-blocking
-      // can't be set
-      if (File->Name() != "/dev/null")
-        SetNonBlock(File->Fd(),false);
-      while (Srv->In.WriteSpace() == true)
-      {
-        if (Srv->In.Write(File->Fd()) == false)
-           return _error->Errno("write",_("Error writing to the file"));
+   URI Uri = Itm->Uri;

 
 

-        // Done
-        if (Srv->In.IsLimit() == true)
-           return true;
-      }
-   }
-   
-   // See if this is because the server finished the data stream
-   if (Srv->In.IsLimit() == false && Srv->State != ServerState::Header && 
-       Srv->Encoding != ServerState::Closes)
-   {
-      Srv->Close();
-      if (LErrno == 0)
-        return _error->Error(_("Error reading from server. Remote end closed connection"));
-      errno = LErrno;
-      return _error->Errno("read",_("Error reading from server"));
-   }
+   // The HTTP server expects a hostname with a trailing :port
+   std::stringstream Req;
+   string ProperHost;
+
+   if (Uri.Host.find(':') != string::npos)
+      ProperHost = '[' + Uri.Host + ']';

    else
    else

-   {
-      Srv->In.Limit(-1);
+      ProperHost = Uri.Host;

 
 

-      // Nothing left in the buffer
-      if (Srv->In.WriteSpace() == false)
-        return false;
-      
-      // We may have got multiple responses back in one packet..
-      Srv->Close();
-      return true;
-   }
-   
-   return false;
-}
-                                                                       /*}}}*/
-// HttpMethod::DealWithHeaders - Handle the retrieved header data      /*{{{*/
-// ---------------------------------------------------------------------
-/* We look at the header data we got back from the server and decide what
-   to do. Returns DealWithHeadersResult (see http.h for details).
- */
-HttpMethod::DealWithHeadersResult
-HttpMethod::DealWithHeaders(FetchResult &Res,ServerState *Srv)
-{
-   // Not Modified
-   if (Srv->Result == 304)
-   {
-      unlink(Queue->DestFile.c_str());
-      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
-    * because we *always* use GET, not other HTTP methods.  There are
-    * three redirection codes for which it is not appropriate that we
-    * redirect.  Pass on those codes so the error handling kicks in.
-    */
-   if (AllowRedirect
-       && (Srv->Result > 300 && Srv->Result < 400)
-       && (Srv->Result != 300       // Multiple Choices
-           && Srv->Result != 304    // Not Modified
-           && Srv->Result != 306))  // (Not part of HTTP/1.1, reserved)
-   {
-      if (Srv->Location.empty() == true);
-      else if (Srv->Location[0] == '/' && Queue->Uri.empty() == false)
-      {
-        URI Uri = Queue->Uri;
-        if (Uri.Host.empty() == false)
-            NextURI = URI::SiteOnly(Uri);
-        else
-           NextURI.clear();
-        NextURI.append(DeQuoteString(Srv->Location));
-        return TRY_AGAIN_OR_REDIRECT;
-      }
-      else
-      {
-         NextURI = DeQuoteString(Srv->Location);
-         URI tmpURI = NextURI;
-         // Do not allow a redirection to switch protocol
-         if (tmpURI.Access == "http")
-            return TRY_AGAIN_OR_REDIRECT;
-      }
-      /* else pass through for error message */
-   }
-   // retry after an invalid range response without partial data
-   else if (Srv->Result == 416)
-   {
-      struct stat SBuf;
-      if (stat(Queue->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
-      {
-        if ((unsigned long long)SBuf.st_size == Srv->Size)
-        {
-           // the file is completely downloaded, but was not moved
-           Srv->StartPos = Srv->Size;
-           Srv->Result = 200;
-           Srv->HaveContent = false;
-        }
-        else if (unlink(Queue->DestFile.c_str()) == 0)
-        {
-           NextURI = Queue->Uri;
-           return TRY_AGAIN_OR_REDIRECT;
-        }
-      }
-   }
- 
-   /* We have a reply we dont handle. This should indicate a perm server
-      failure */
-   if (Srv->Result < 200 || Srv->Result >= 300)
+   /* RFC 2616 §5.1.2 requires absolute URIs for requests to proxies,
+      but while its a must for all servers to accept absolute URIs,
+      it is assumed clients will sent an absolute path for non-proxies */
+   std::string requesturi;
+   if (Server->Proxy.empty() == true || Server->Proxy.Host.empty())
+      requesturi = Uri.Path;
+   else
+      requesturi = Itm->Uri;
+
+   // The "+" is encoded as a workaround for a amazon S3 bug
+   // see LP bugs #1003633 and #1086997.
+   requesturi = QuoteString(requesturi, "+~ ");
+
+   /* Build the request. No keep-alive is included as it is the default
+      in 1.1, can cause problems with proxies, and we are an HTTP/1.1
+      client anyway.
+      C.f. https://tools.ietf.org/wg/httpbis/trac/ticket/158 */
+   Req << "GET " << requesturi << " HTTP/1.1\r\n";
+   if (Uri.Port != 0)
+      Req << "Host: " << ProperHost << ":" << std::to_string(Uri.Port) << "\r\n";
+   else
+      Req << "Host: " << ProperHost << "\r\n";
+
+   // generate a cache control header (if needed)
+   if (_config->FindB("Acquire::http::No-Cache",false) == true)
+      Req << "Cache-Control: no-cache\r\n"
+        << "Pragma: no-cache\r\n";
+   else if (Itm->IndexFile == true)
+      Req << "Cache-Control: max-age=" << std::to_string(_config->FindI("Acquire::http::Max-Age",0)) << "\r\n";
+   else if (_config->FindB("Acquire::http::No-Store",false) == true)
+      Req << "Cache-Control: no-store\r\n";
+
+   // If we ask for uncompressed files servers might respond with content-
+   // negotiation which lets us end up with compressed files we do not support,
+   // see 657029, 657560 and co, so if we have no extension on the request
+   // ask for text only. As a sidenote: If there is nothing to negotate servers
+   // seem to be nice and ignore it.
+   if (_config->FindB("Acquire::http::SendAccept", true) == true)

    {
    {

-      char err[255];
-      snprintf(err,sizeof(err)-1,"HttpError%i",Srv->Result);
-      SetFailReason(err);
-      _error->Error("%u %s",Srv->Result,Srv->Code);
-      if (Srv->HaveContent == true)
-        return ERROR_WITH_CONTENT_PAGE;
-      return ERROR_UNRECOVERABLE;
+      size_t const filepos = Itm->Uri.find_last_of('/');
+      string const file = Itm->Uri.substr(filepos + 1);
+      if (flExtension(file) == file)
+        Req << "Accept: text/*\r\n";

    }
 
    }
 

-   // This is some sort of 2xx 'data follows' reply
-   Res.LastModified = Srv->Date;
-   Res.Size = Srv->Size;
-   
-   // Open the file
-   delete File;
-   File = new FileFd(Queue->DestFile,FileFd::WriteAny);
-   if (_error->PendingError() == true)
-      return ERROR_NOT_FROM_SERVER;
+   // Check for a partial file and send if-queries accordingly
+   struct stat SBuf;
+   if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
+      Req << "Range: bytes=" << SBuf.st_size << "-\r\n"
+        << "If-Range: " << TimeRFC1123(SBuf.st_mtime) << "\r\n";
+   else if (Itm->LastModified != 0)
+      Req << "If-Modified-Since: " << TimeRFC1123(Itm->LastModified).c_str() << "\r\n";

 
 

-   FailFile = Queue->DestFile;
-   FailFile.c_str();   // Make sure we dont do a malloc in the signal handler
-   FailFd = File->Fd();
-   FailTime = Srv->Date;
+   if (Server->Proxy.User.empty() == false || Server->Proxy.Password.empty() == false)
+      Req << "Proxy-Authorization: Basic "
+        << Base64Encode(Server->Proxy.User + ":" + Server->Proxy.Password) << "\r\n";

 
 

-   delete Srv->In.Hash;
-   Srv->In.Hash = new Hashes;
+   maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
+   if (Uri.User.empty() == false || Uri.Password.empty() == false)
+      Req << "Authorization: Basic "
+        << Base64Encode(Uri.User + ":" + Uri.Password) << "\r\n";

 
 

-   // Set the expected size and read file for the hashes
-   if (Srv->StartPos >= 0)
-   {
-      Res.ResumePoint = Srv->StartPos;
-      File->Truncate(Srv->StartPos);
+   Req << "User-Agent: " << _config->Find("Acquire::http::User-Agent",
+               "Debian APT-HTTP/1.3 (" PACKAGE_VERSION ")") << "\r\n";

 
 

-      if (Srv->In.Hash->AddFD(*File,Srv->StartPos) == false)
-      {
-        _error->Errno("read",_("Problem hashing file"));
-        return ERROR_NOT_FROM_SERVER;
-      }
-   }
-   
-   SetNonBlock(File->Fd(),true);
-   return FILE_IS_OPEN;
-}
-                                                                       /*}}}*/
-// HttpMethod::SigTerm - Handle a fatal signal                         /*{{{*/
-// ---------------------------------------------------------------------
-/* This closes and timestamps the open file. This is neccessary to get 
-   resume behavoir on user abort */
-void HttpMethod::SigTerm(int)
-{
-   if (FailFd == -1)
-      _exit(100);
-   close(FailFd);
-   
-   // Timestamp
-   struct utimbuf UBuf;
-   UBuf.actime = FailTime;
-   UBuf.modtime = FailTime;
-   utime(FailFile.c_str(),&UBuf);
-   
-   _exit(100);
-}
-                                                                       /*}}}*/
-// HttpMethod::Fetch - Fetch an item                                   /*{{{*/
-// ---------------------------------------------------------------------
-/* This adds an item to the pipeline. We keep the pipeline at a fixed
-   depth. */
-bool HttpMethod::Fetch(FetchItem *)
-{
-   if (Server == 0)
-      return true;
+   Req << "\r\n";

 
 

-   // 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;
-      
-      // Make sure we stick with the same server
-      if (Server->Comp(I->Uri) == false)
-        break;
-      if (QueueBack == I)
-      {
-        QueueBack = I->Next;
-        SendReq(I,Server->Out);
-        continue;
-      }
-   }
-   
-   return true;
-};
+   if (Debug == true)
+      cerr << Req.str() << endl;
+
+   Server->WriteResponse(Req.str());
+}

                                                                        /*}}}*/
 // HttpMethod::Configuration - Handle a configuration message          /*{{{*/
 // ---------------------------------------------------------------------
 /* We stash the desired pipeline depth */
 bool HttpMethod::Configuration(string Message)
 {
                                                                        /*}}}*/
 // HttpMethod::Configuration - Handle a configuration message          /*{{{*/
 // ---------------------------------------------------------------------
 /* We stash the desired pipeline depth */
 bool HttpMethod::Configuration(string Message)
 {

-   if (pkgAcqMethod::Configuration(Message) == false)
+   if (ServerMethod::Configuration(Message) == false)

       return false;
       return false;

-   
+

    AllowRedirect = _config->FindB("Acquire::http::AllowRedirect",true);
    AllowRedirect = _config->FindB("Acquire::http::AllowRedirect",true);

-   TimeOut = _config->FindI("Acquire::http::Timeout",TimeOut);

    PipelineDepth = _config->FindI("Acquire::http::Pipeline-Depth",
                                  PipelineDepth);
    Debug = _config->FindB("Debug::Acquire::http",false);
    PipelineDepth = _config->FindI("Acquire::http::Pipeline-Depth",
                                  PipelineDepth);
    Debug = _config->FindB("Debug::Acquire::http",false);

-   AutoDetectProxyCmd = _config->Find("Acquire::http::ProxyAutoDetect");
-
-   // Get the proxy to use
-   AutoDetectProxy();

 
    return true;
 }
                                                                        /*}}}*/
 
    return true;
 }
                                                                        /*}}}*/

-// HttpMethod::Loop - Main loop                                                /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-int HttpMethod::Loop()
+std::unique_ptr<ServerState> HttpMethod::CreateServerState(URI const &uri)/*{{{*/

 {
 {

-   typedef vector<string> StringVector;
-   typedef vector<string>::iterator StringVectorIterator;
-   map<string, StringVector> Redirected;
-
-   signal(SIGTERM,SigTerm);
-   signal(SIGINT,SigTerm);
-   
-   Server = 0;
-   
-   int FailCounter = 0;
-   while (1)
-   {      
-      // We have no commands, wait for some to arrive
-      if (Queue == 0)
-      {
-        if (WaitFd(STDIN_FILENO) == false)
-           return 0;
-      }
-      
-      /* Run messages, we can accept 0 (no message) if we didn't
-         do a WaitFd above.. Otherwise the FD is closed. */
-      int Result = Run(true);
-      if (Result != -1 && (Result != 0 || Queue == 0))
-      {
-        if(FailReason.empty() == false ||
-           _config->FindB("Acquire::http::DependOnSTDIN", true) == true)
-           return 100;
-        else
-           return 0;
-      }
-
-      if (Queue == 0)
-        continue;
-      
-      // Connect to the server
-      if (Server == 0 || Server->Comp(Queue->Uri) == false)
-      {
-        delete Server;
-        Server = new ServerState(Queue->Uri,this);
-      }
-      /* 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
-        since we don't have to wait for the close sequence to
-         complete */
-      if (Server->Persistent == false)
-        Server->Close();
-      
-      // Reset the pipeline
-      if (Server->ServerFd == -1)
-        QueueBack = Queue;      
-        
-      // Connnect to the host
-      if (Server->Open() == false)
-      {
-        Fail(true);
-        delete Server;
-        Server = 0;
-        continue;
-      }
-
-      // Fill the pipeline.
-      Fetch(0);
-      
-      // Fetch the next URL header data from the server.
-      switch (Server->RunHeaders())
-      {
-        case ServerState::RUN_HEADERS_OK:
-        break;
-        
-        // The header data is bad
-        case ServerState::RUN_HEADERS_PARSE_ERROR:
-        {
-           _error->Error(_("Bad header data"));
-           Fail(true);
-           RotateDNS();
-           continue;
-        }
-        
-        // The server closed a connection during the header get..
-        default:
-        case ServerState::RUN_HEADERS_IO_ERROR:
-        {
-           FailCounter++;
-           _error->Discard();
-           Server->Close();
-           Server->Pipeline = false;
-           
-           if (FailCounter >= 2)
-           {
-              Fail(_("Connection failed"),true);
-              FailCounter = 0;
-           }
-           
-           RotateDNS();
-           continue;
-        }
-      };
-
-      // Decide what to do.
-      FetchResult Res;
-      Res.Filename = Queue->DestFile;
-      switch (DealWithHeaders(Res,Server))
-      {
-        // Ok, the file is Open
-        case FILE_IS_OPEN:
-        {
-           URIStart(Res);
-
-           // Run the data
-           bool Result = true;
-            if (Server->HaveContent)
-              Result = Server->RunData();
-
-           /* If the server is sending back sizeless responses then fill in
-              the size now */
-           if (Res.Size == 0)
-              Res.Size = File->Size();
-           
-           // Close the file, destroy the FD object and timestamp it
-           FailFd = -1;
-           delete File;
-           File = 0;
-           
-           // Timestamp
-           struct utimbuf UBuf;
-           time(&UBuf.actime);
-           UBuf.actime = Server->Date;
-           UBuf.modtime = Server->Date;
-           utime(Queue->DestFile.c_str(),&UBuf);
-
-           // Send status to APT
-           if (Result == true)
-           {
-              Res.TakeHashes(*Server->In.Hash);
-              URIDone(Res);
-           }
-           else
-           {
-              if (Server->ServerFd == -1)
-              {
-                 FailCounter++;
-                 _error->Discard();
-                 Server->Close();
-                 
-                 if (FailCounter >= 2)
-                 {
-                    Fail(_("Connection failed"),true);
-                    FailCounter = 0;
-                 }
-                 
-                 QueueBack = Queue;
-              }
-              else
-                 Fail(true);
-           }
-           break;
-        }
-        
-        // IMS hit
-        case IMS_HIT:
-        {
-           URIDone(Res);
-           break;
-        }
-        
-        // Hard server error, not found or something
-        case ERROR_UNRECOVERABLE:
-        {
-           Fail();
-           break;
-        }
-         
-        // Hard internal error, kill the connection and fail
-        case ERROR_NOT_FROM_SERVER:
-        {
-           delete File;
-           File = 0;
-
-           Fail();
-           RotateDNS();
-           Server->Close();
-           break;
-        }
-
-        // We need to flush the data, the header is like a 404 w/ error text
-        case ERROR_WITH_CONTENT_PAGE:
-        {
-           Fail();
-           
-           // Send to content to dev/null
-           File = new FileFd("/dev/null",FileFd::WriteExists);
-           Server->RunData();
-           delete File;
-           File = 0;
-           break;
-        }
-        
-         // Try again with a new URL
-         case TRY_AGAIN_OR_REDIRECT:
-         {
-            // Clear rest of response if there is content
-            if (Server->HaveContent)
-            {
-               File = new FileFd("/dev/null",FileFd::WriteExists);
-               Server->RunData();
-               delete File;
-               File = 0;
-            }
-
-            /* Detect redirect loops.  No more redirects are allowed
-               after the same URI is seen twice in a queue item. */
-            StringVector &R = Redirected[Queue->DestFile];
-            bool StopRedirects = false;
-            if (R.empty() == true)
-               R.push_back(Queue->Uri);
-            else if (R[0] == "STOP" || R.size() > 10)
-               StopRedirects = true;
-            else
-            {
-               for (StringVectorIterator I = R.begin(); I != R.end(); ++I)
-                  if (Queue->Uri == *I)
-                  {
-                     R[0] = "STOP";
-                     break;
-                  }
- 
-               R.push_back(Queue->Uri);
-            }
- 
-            if (StopRedirects == false)
-               Redirect(NextURI);
-            else
-               Fail();
- 
-            break;
-         }
-
-        default:
-        Fail(_("Internal error"));
-        break;
-      }
-      
-      FailCounter = 0;
-   }
-   
-   return 0;
+   return std::unique_ptr<ServerState>(new HttpServerState(uri, this));

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

-// HttpMethod::AutoDetectProxy - auto detect proxy                     /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool HttpMethod::AutoDetectProxy()
+void HttpMethod::RotateDNS()                                           /*{{{*/

 {
 {

-   if (AutoDetectProxyCmd.empty())
-      return true;
-
-   if (Debug)
-      clog << "Using auto proxy detect command: " << AutoDetectProxyCmd << endl;
-
-   int Pipes[2] = {-1,-1};
-   if (pipe(Pipes) != 0)
-      return _error->Errno("pipe", "Failed to create Pipe");
-
-   pid_t Process = ExecFork();
-   if (Process == 0)
-   {
-      close(Pipes[0]);
-      dup2(Pipes[1],STDOUT_FILENO);
-      SetCloseExec(STDOUT_FILENO,false);
-
-      const char *Args[2];
-      Args[0] = AutoDetectProxyCmd.c_str();
-      Args[1] = 0;
-      execv(Args[0],(char **)Args);
-      cerr << "Failed to exec method " << Args[0] << endl;
-      _exit(100);
-   }
-   char buf[512];
-   int InFd = Pipes[0];
-   close(Pipes[1]);
-   int res = read(InFd, buf, sizeof(buf)-1);
-   ExecWait(Process, "ProxyAutoDetect", true);
-
-   if (res < 0)
-      return _error->Errno("read", "Failed to read");
-   if (res == 0)
-      return _error->Warning("ProxyAutoDetect returned no data");
-
-   // add trailing \0
-   buf[res] = 0;
-
-   if (Debug)
-      clog << "auto detect command returned: '" << buf << "'" << endl;
-
-   if (strstr(buf, "http://") == buf)
-      _config->Set("Acquire::http::proxy", _strstrip(buf));
-
-   return true;
+   ::RotateDNS();

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

-
-