New http method

Author: jgg
Date: 1998-11-01 05:27:29 GMT
New http method

6 files changed, 1060 insertions, 17 deletions

diff --git a/methods/copy.cc b/methods/copy.cc
index e63801f38..94e88e503 100644
--- a/methods/copy.cc
+++ b/methods/copy.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: copy.cc,v 1.4 1998/10/30 07:53:51 jgg Exp $
+// $Id: copy.cc,v 1.5 1998/11/01 05:27:40 jgg Exp $
 /* ######################################################################
 
    Copy URI - This method takes a uri like a file: uri and copies it
@@ -20,7 +20,7 @@
 
 class CopyMethod : public pkgAcqMethod
 {
-   virtual bool Fetch(string Message,URI Get);
+   virtual bool Fetch(FetchItem *Itm);
    
    public:
    
@@ -30,13 +30,14 @@ class CopyMethod : public pkgAcqMethod
 // CopyMethod::Fetch - Fetch a file					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool CopyMethod::Fetch(string Message,URI Get)
+bool CopyMethod::Fetch(FetchItem *Itm)
 {
+   URI Get = Itm->Uri;
    string File = Get.Path;
 
    // See if the file exists
    FileFd From(File,FileFd::ReadOnly);
-   FileFd To(DestFile,FileFd::WriteEmpty);
+   FileFd To(Itm->DestFile,FileFd::WriteEmpty);
    To.EraseOnFailure();
    if (_error->PendingError() == true)
       return false;
@@ -59,7 +60,7 @@ bool CopyMethod::Fetch(string Message,URI Get)
    struct utimbuf TimeBuf;
    TimeBuf.actime = Buf.st_atime;
    TimeBuf.modtime = Buf.st_mtime;
-   if (utime(DestFile.c_str(),&TimeBuf) != 0)
+   if (utime(Itm->DestFile.c_str(),&TimeBuf) != 0)
    {
       To.OpFail();
       return _error->Errno("utime","Failed to set modification time");
@@ -68,7 +69,7 @@ bool CopyMethod::Fetch(string Message,URI Get)
    // Forumulate a result
    FetchResult Res;
    Res.Size = Buf.st_size;
-   Res.Filename = DestFile;
+   Res.Filename = Itm->DestFile;
    Res.LastModified = Buf.st_mtime;
    Res.IMSHit = false;
    
diff --git a/methods/file.cc b/methods/file.cc
index 64490749b..0e5e2ebef 100644
--- a/methods/file.cc
+++ b/methods/file.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: file.cc,v 1.4 1998/10/30 07:53:52 jgg Exp $
+// $Id: file.cc,v 1.5 1998/11/01 05:27:41 jgg Exp $
 /* ######################################################################
 
    File URI method for APT
@@ -22,7 +22,7 @@
 
 class FileMethod : public pkgAcqMethod
 {
-   virtual bool Fetch(string Message,URI Get);
+   virtual bool Fetch(FetchItem *Itm);
    
    public:
    
@@ -32,8 +32,9 @@ class FileMethod : public pkgAcqMethod
 // FileMethod::Fetch - Fetch a file					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool FileMethod::Fetch(string Message,URI Get)
+bool FileMethod::Fetch(FetchItem *Itm)
 {
+   URI Get = Itm->Uri;
    string File = Get.Path;
    FetchResult Res;
    
@@ -45,7 +46,7 @@ bool FileMethod::Fetch(string Message,URI Get)
       Res.Filename = File;
       Res.LastModified = Buf.st_mtime;
       Res.IMSHit = false;
-      if (LastModified == Buf.st_mtime)
+      if (Itm->LastModified == Buf.st_mtime)
 	 Res.IMSHit = true;
    }
    
@@ -61,7 +62,7 @@ bool FileMethod::Fetch(string Message,URI Get)
 	 AltRes.Filename = File;
 	 AltRes.LastModified = Buf.st_mtime;
 	 AltRes.IMSHit = false;
-	 if (LastModified == Buf.st_mtime)
+	 if (Itm->LastModified == Buf.st_mtime)
 	    AltRes.IMSHit = true;
 	 
 	 URIDone(Res,&AltRes);
diff --git a/methods/gzip.cc b/methods/gzip.cc
index acba7fc52..be4f82e6f 100644
--- a/methods/gzip.cc
+++ b/methods/gzip.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: gzip.cc,v 1.3 1998/10/30 07:53:53 jgg Exp $
+// $Id: gzip.cc,v 1.4 1998/11/01 05:27:43 jgg Exp $
 /* ######################################################################
 
    GZip method - Take a file URI in and decompress it into the target 
@@ -23,7 +23,7 @@
 
 class GzipMethod : public pkgAcqMethod
 {
-   virtual bool Fetch(string Message,URI Get);
+   virtual bool Fetch(FetchItem *Itm);
    
    public:
    
@@ -33,11 +33,13 @@ class GzipMethod : public pkgAcqMethod
 // GzipMethod::Fetch - Decompress the passed URI			/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool GzipMethod::Fetch(string Message,URI Get)
+bool GzipMethod::Fetch(FetchItem *Itm)
 {
+   URI Get = Itm->Uri;
+   
    // Open the source and destintation files
    FileFd From(Get.Path,FileFd::ReadOnly);
-   FileFd To(DestFile,FileFd::WriteEmpty);   
+   FileFd To(Itm->DestFile,FileFd::WriteEmpty);   
    To.EraseOnFailure();
    if (_error->PendingError() == true)
       return false;
@@ -90,13 +92,13 @@ bool GzipMethod::Fetch(string Message,URI Get)
    struct utimbuf TimeBuf;
    TimeBuf.actime = Buf.st_atime;
    TimeBuf.modtime = Buf.st_mtime;
-   if (utime(DestFile.c_str(),&TimeBuf) != 0)
+   if (utime(Itm->DestFile.c_str(),&TimeBuf) != 0)
       return _error->Errno("utime","Failed to set modification time");
 
    // Return a Done response
    FetchResult Res;
    Res.LastModified = Buf.st_mtime;
-   Res.Filename = DestFile;
+   Res.Filename = Itm->DestFile;
    URIDone(Res);
    
    return true;
diff --git a/methods/http.cc b/methods/http.cc
new file mode 100644
index 000000000..6418a7719
--- /dev/null
+++ b/methods/http.cc
@@ -0,0 +1,892 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: http.cc,v 1.1 1998/11/01 05:30:47 jgg Exp $
+/* ######################################################################
+
+   HTTP Aquire Method - This is the HTTP aquire 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 accepts on the command line
+   a list of url destination pairs and writes to stdout the status of the
+   operation as defined in the APT method spec.
+   
+   It is based on a doubly buffered select loop. All the requests are 
+   fed into a single output buffer that is constantly fed out the 
+   socket. This provides ideal pipelining as in many cases all of the
+   requests will fit into a single packet. The input socket is buffered 
+   the same way and fed into the fd for the file.
+   
+   This double buffering provides fairly substantial transfer rates,
+   compared to wget the http method is about 4% faster. Most importantly,
+   when HTTP is compared with FTP as a protocol the speed difference is
+   huge. In tests over the internet from two sites to llug (via ATM) this
+   program got 230k/s sustained http transfer rates. FTP on the other 
+   hand topped out at 170k/s. That combined with the time to setup the
+   FTP connection makes HTTP a vastly superior protocol.
+      
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/acquire-method.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/md5.h>
+
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <utime.h>
+#include <unistd.h>
+#include <stdio.h>
+
+// Internet stuff
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include "http.h"
+									/*}}}*/
+
+// CircleBuf::CircleBuf - Circular input buffer				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+CircleBuf::CircleBuf(unsigned long Size) : Size(Size), MD5(0)
+{
+   Buf = new unsigned char[Size];
+   Reset();
+}
+									/*}}}*/
+// CircleBuf::Reset - Reset to the default state			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void CircleBuf::Reset()
+{
+   InP = 0;
+   OutP = 0;
+   StrPos = 0;
+   MaxGet = (unsigned int)-1;
+   OutQueue = string();
+   if (MD5 != 0)
+   {
+      delete MD5;
+      MD5 = new MD5Summation;
+   }   
+};
+									/*}}}*/
+// CircleBuf::Read - Read from a FD into the circular buffer		/*{{{*/
+// ---------------------------------------------------------------------
+/* This fills up the buffer with as much data as is in the FD, assuming it
+   is non-blocking.. */
+bool CircleBuf::Read(int Fd)
+{
+   while (1)
+   {
+      // Woops, buffer is full
+      if (InP - OutP == Size)
+	 return true;
+      
+      // Write the buffer segment
+      int Res;
+      Res = read(Fd,Buf + (InP%Size),LeftRead());
+      
+      if (Res == 0)
+	 return false;
+      if (Res < 0)
+      {
+	 if (errno == EAGAIN)
+	    return true;
+	 return false;
+      }
+
+      if (InP == 0)
+	 gettimeofday(&Start,0);
+      InP += Res;
+   }
+}
+									/*}}}*/
+// CircleBuf::Read - Put the string into the buffer			/*{{{*/
+// ---------------------------------------------------------------------
+/* This will hold the string in and fill the buffer with it as it empties */
+bool CircleBuf::Read(string Data)
+{
+   OutQueue += Data;
+   FillOut();
+   return true;
+}
+									/*}}}*/
+// CircleBuf::FillOut - Fill the buffer from the output queue		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void CircleBuf::FillOut()
+{
+   if (OutQueue.empty() == true)
+      return;
+   while (1)
+   {
+      // Woops, buffer is full
+      if (InP - OutP == Size)
+	 return;
+      
+      // Write the buffer segment
+      unsigned long Sz = LeftRead();
+      if (OutQueue.length() - StrPos < Sz)
+	 Sz = OutQueue.length() - StrPos;
+      memcpy(Buf + (InP%Size),OutQueue.begin() + StrPos,Sz);
+      
+      // Advance
+      StrPos += Sz;
+      InP += Sz;
+      if (OutQueue.length() == StrPos)
+      {
+	 StrPos = 0;
+	 OutQueue = "";
+	 return;
+      }
+   }
+}
+									/*}}}*/
+// CircleBuf::Write - Write from the buffer into a FD			/*{{{*/
+// ---------------------------------------------------------------------
+/* This empties the buffer into the FD. */
+bool CircleBuf::Write(int Fd)
+{
+   while (1)
+   {
+      FillOut();
+      
+      // Woops, buffer is empty
+      if (OutP == InP)
+	 return true;
+      
+      if (OutP == MaxGet)
+	 return true;
+      
+      // Write the buffer segment
+      int Res;
+      Res = write(Fd,Buf + (OutP%Size),LeftWrite());
+
+      if (Res == 0)
+	 return false;
+      if (Res < 0)
+      {
+	 if (errno == EAGAIN)
+	    return true;
+	 
+	 return false;
+      }
+      
+      if (MD5 != 0)
+	 MD5->Add(Buf + (OutP%Size),Res);
+      
+      OutP += Res;
+   }
+}
+									/*}}}*/
+// CircleBuf::WriteTillEl - Write from the buffer to a string		/*{{{*/
+// ---------------------------------------------------------------------
+/* This copies till the first empty line */
+bool CircleBuf::WriteTillEl(string &Data,bool Single)
+{
+   // We cheat and assume it is unneeded to have more than one buffer load
+   for (unsigned long I = OutP; I < InP; I++)
+   {      
+      if (Buf[I%Size] != '\n')
+	 continue;
+      for (I++; I < InP && Buf[I%Size] == '\r'; I++);
+      
+      if (Single == false)
+      {
+	 if (Buf[I%Size] != '\n')
+	    continue;
+	 for (I++; I < InP && Buf[I%Size] == '\r'; I++);
+      }
+      
+      if (I > InP)
+	 I = InP;
+      
+      Data = "";
+      while (OutP < I)
+      {
+	 unsigned long Sz = LeftWrite();
+	 if (Sz == 0)
+	    return false;
+	 if (I - OutP < LeftWrite())
+	    Sz = I - OutP;
+	 Data += string((char *)(Buf + (OutP%Size)),Sz);
+	 OutP += Sz;
+      }
+      return true;
+   }      
+   return false;
+}
+									/*}}}*/
+// CircleBuf::Stats - Print out stats information			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void CircleBuf::Stats()
+{
+   if (InP == 0)
+      return;
+   
+   struct timeval Stop;
+   gettimeofday(&Stop,0);
+/*   float Diff = Stop.tv_sec - Start.tv_sec + 
+             (float)(Stop.tv_usec - Start.tv_usec)/1000000;
+   clog << "Got " << InP << " in " << Diff << " at " << InP/Diff << endl;*/
+}
+									/*}}}*/
+
+// ServerState::ServerState - Constructor				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+ServerState::ServerState(URI Srv,HttpMethod *Owner) : Owner(Owner),
+                        In(64*1024), Out(1*1024),
+                        ServerName(Srv)
+{
+   Reset();
+}
+									/*}}}*/
+// ServerState::Open - Open a connection to the server			/*{{{*/
+// ---------------------------------------------------------------------
+/* This opens a connection to the server. */
+string LastHost;
+in_addr LastHostA;
+bool ServerState::Open()
+{
+   Close();
+   
+   int Port;
+   string Host;
+   
+   if (Proxy.empty() == false)
+   {
+      Port = ServerName.Port;
+      Host = ServerName.Host;
+   }
+   else
+   {
+      Port = Proxy.Port;
+      Host = Proxy.Host;
+   }
+   
+   if (LastHost != Host)
+   {
+      Owner->Status("Connecting to %s",Host.c_str());
+
+      // Lookup the host
+      hostent *Addr = gethostbyname(Host.c_str());
+      if (Addr == 0)
+	 return _error->Errno("gethostbyname","Could not lookup host %s",Host.c_str());
+      LastHost = Host;
+      LastHostA = *(in_addr *)(Addr->h_addr_list[0]);
+   }
+   
+   Owner->Status("Connecting to %s (%s)",Host.c_str(),inet_ntoa(LastHostA));
+   
+   // Get a socket
+   if ((ServerFd = socket(AF_INET,SOCK_STREAM,0)) < 0)
+      return _error->Errno("socket","Could not create a socket");
+   
+   // Connect to the server
+   struct sockaddr_in server;
+   server.sin_family = AF_INET;
+   server.sin_port = htons(Port);
+   server.sin_addr = LastHostA;
+   if (connect(ServerFd,(sockaddr *)&server,sizeof(server)) < 0)
+      return _error->Errno("socket","Could not create a socket");
+
+   SetNonBlock(ServerFd,true);
+   return true;
+}
+									/*}}}*/
+// ServerState::Close - Close a connection to the server		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool ServerState::Close()
+{
+   close(ServerFd);
+   ServerFd = -1;
+   In.Reset();
+   Out.Reset();
+   return true;
+}
+									/*}}}*/
+// ServerState::RunHeaders - Get the headers before the data		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool ServerState::RunHeaders()
+{
+   State = Header;
+   
+   Owner->Status("Waiting for file");
+
+   Major = 0; 
+   Minor = 0; 
+   Result = 0; 
+   Size = 0; 
+   StartPos = 0;
+   Encoding = Closes; 
+   time(&Date);
+
+   do
+   {
+      string Data;
+      if (In.WriteTillEl(Data) == false)
+	 continue;
+      
+      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-I)) == false)
+	    return false;
+	 I = J;
+      }
+      return true;
+   }
+   while (Owner->Go(false,this) == true);
+   
+   return false;
+}
+									/*}}}*/
+// ServerState::RunData - Transfer the data from the socket		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool ServerState::RunData()
+{
+   State = Data;
+   
+   // Chunked transfer encoding is fun..
+   if (Encoding == Chunked)
+   {
+      while (1)
+      {
+	 // Grab the block size
+	 bool Last = true;
+	 string Data;
+	 In.Limit(-1);
+	 do
+	 {
+	    if (In.WriteTillEl(Data,true) == true)
+	       break;
+	 }
+	 while ((Last = Owner->Go(false,this)) == true);
+
+	 if (Last == false)
+	    return false;
+	 	 
+	 // See if we are done
+	 unsigned long Len = strtol(Data.c_str(),0,16);
+	 if (Len == 0)
+	 {
+	    In.Limit(-1);
+	    
+	    // We have to remove the entity trailer
+	    Last = true;
+	    do
+	    {
+	       if (In.WriteTillEl(Data,true) == true && Data.length() <= 2)
+		  break;
+	    }
+	    while ((Last = Owner->Go(false,this)) == true);
+	    if (Last == false)
+	       return false;
+	    return true;
+	 }
+	 
+	 // Transfer the block
+	 In.Limit(Len);
+	 while (Owner->Go(true,this) == true)
+	    if (In.IsLimit() == true)
+	       break;
+	 
+	 // Error
+	 if (In.IsLimit() == false)
+	    return false;
+	 
+	 // The server sends an extra new line before the next block specifier..
+	 In.Limit(-1);
+	 Last = true;
+	 do
+	 {
+	    if (In.WriteTillEl(Data,true) == true)
+	       break;
+	 }
+	 while ((Last = Owner->Go(false,this)) == true);
+	 if (Last == false)
+	    return false;
+      }      
+   }
+   else
+   {
+      /* Closes encoding is used when the server did not specify a size, the
+         loss of the connection means we are done */
+      if (Encoding == Closes)
+	 In.Limit(-1);
+      else
+	 In.Limit(Size - StartPos);
+      
+      // Just transfer the whole block.
+      do
+      {
+	 if (In.IsLimit() == false)
+	    continue;
+	 
+	 In.Limit(-1);
+	 return true;
+      }
+      while (Owner->Go(true,this) == true);
+   }
+
+   return Owner->Flush(this);
+}
+									/*}}}*/
+// ServerState::HeaderLine - Process a header line			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool ServerState::HeaderLine(string Line)
+{
+   if (Line.empty() == true)
+      return true;
+   
+   // The http server might be trying to do something evil.
+   if (Line.length() >= MAXLEN)
+      return _error->Error("Got a single header line over %u chars",MAXLEN);
+
+   string::size_type Pos = Line.find(' ');
+   if (Pos == string::npos || Pos+1 > Line.length())
+      return _error->Error("Bad header line");
+   
+   string Tag = string(Line,0,Pos);
+   string Val = string(Line,Pos+1);
+
+   if (stringcasecmp(Tag,"HTTP") == 0)
+   {
+      // Evil servers return no version
+      if (Line[4] == '/')
+      {
+	 if (sscanf(Line.c_str(),"HTTP/%u.%u %u %[^\n]",&Major,&Minor,
+		    &Result,Code) != 4)
+	    return _error->Error("The http server sent an invalid reply header");
+      }
+      else
+      {
+	 Major = 0;
+	 Minor = 9;
+	 if (sscanf(Line.c_str(),"HTTP %u %[^\n]",&Result,Code) != 2)
+	    return _error->Error("The http server sent an invalid reply header");
+      }
+      
+      return true;
+   }      
+      
+   if (stringcasecmp(Tag,"Content-Length:"))
+   {
+      if (Encoding == Closes)
+	 Encoding = Stream;
+      
+      // The length is already set from the Content-Range header
+      if (StartPos != 0)
+	 return true;
+      
+      if (sscanf(Val.c_str(),"%lu",&Size) != 1)
+	 return _error->Error("The http server sent an invalid Content-Length header");
+      return true;
+   }
+
+   if (stringcasecmp(Tag,"Content-Range:"))
+   {
+      if (sscanf(Val.c_str(),"bytes %lu-%*u/%lu",&StartPos,&Size) != 2)
+	 return _error->Error("The http server sent an invalid Content-Range header");
+      if ((unsigned)StartPos > Size)
+	 return _error->Error("This http server has broken range support");
+      return true;
+   }
+   
+   if (stringcasecmp(Tag,"Transfer-Encoding:"))
+   {
+      if (stringcasecmp(Val,"chunked"))
+	 Encoding = Chunked;
+      return true;
+   }
+
+   if (stringcasecmp(Tag,"Last-Modified:"))
+   {
+      if (StrToTime(Val,Date) == false)
+	 return _error->Error("Unknown date format");
+      return true;
+   }
+
+   return true;
+}
+									/*}}}*/
+
+// HttpMethod::SendReq - Send the HTTP request				/*{{{*/
+// ---------------------------------------------------------------------
+/* This places the http request in the outbound buffer */
+void HttpMethod::SendReq(FetchItem *Itm,CircleBuf &Out)
+{
+   URI Uri = Itm->Uri;
+   
+   // The HTTP server expects a hostname with a trailing :port
+   char Buf[300];
+   string ProperHost = Uri.Host;
+   if (Uri.Port != 0)
+   {
+      sprintf(Buf,":%u",Uri.Port);
+      ProperHost += Buf;
+   }   
+      
+   // Build the request
+   if (Proxy.empty() == true)
+      sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\nConnection: keep-alive\r\n",
+	      Uri.Path.c_str(),ProperHost.c_str());
+   else
+      sprintf(Buf,"GET %s HTTP/1.1\r\nHost: %s\r\n",
+	      Itm->Uri.c_str(),ProperHost.c_str());
+   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=%li-\r\nIf-Range: %s\r\n",SBuf.st_size - 1,
+	      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 (ProxyAuth.empty() == false)
+      Req += string("Proxy-Authorization: Basic ") + Base64Encode(ProxyAuth) + "\r\n";*/
+
+   Req += "User-Agent: Debian APT-HTTP/1.2\r\n\r\n";
+   Out.Read(Req);
+}
+									/*}}}*/
+// HttpMethod::Go - Run a single loop					/*{{{*/
+// ---------------------------------------------------------------------
+/* This runs the select loop over the server FDs, Output file FDs and
+   stdin. */
+bool HttpMethod::Go(bool ToFile,ServerState *Srv)
+{
+   // Server has closed the connection
+   if (Srv->ServerFd == -1 && Srv->In.WriteSpace() == false)
+      return false;
+   
+   fd_set rfds,wfds,efds;
+   FD_ZERO(&rfds);
+   FD_ZERO(&wfds);
+   FD_ZERO(&efds);
+   
+   // Add the server
+   if (Srv->Out.WriteSpace() == true && Srv->ServerFd != -1) 
+      FD_SET(Srv->ServerFd,&wfds);
+   if (Srv->In.ReadSpace() == true && Srv->ServerFd != -1) 
+      FD_SET(Srv->ServerFd,&rfds);
+   
+   // Add the file
+   int FileFD = -1;
+   if (File != 0)
+      FileFD = File->Fd();
+   
+   if (Srv->In.WriteSpace() == true && ToFile == true && FileFD != -1)
+      FD_SET(FileFD,&wfds);
+   
+   // Add stdin
+   FD_SET(STDIN_FILENO,&rfds);
+	  
+   // Error Set
+   if (FileFD != -1)
+      FD_SET(FileFD,&efds);
+   if (Srv->ServerFd != -1)
+      FD_SET(Srv->ServerFd,&efds);
+
+   // Figure out the max fd
+   int MaxFd = FileFD;
+   if (MaxFd < Srv->ServerFd)
+      MaxFd = Srv->ServerFd;
+   
+   // Select
+   struct timeval tv;
+   tv.tv_sec = 120;
+   tv.tv_usec = 0;
+   int Res = 0;
+   if ((Res = select(MaxFd+1,&rfds,&wfds,&efds,&tv)) < 0)
+      return _error->Errno("select","Select failed");
+   
+   if (Res == 0)
+   {
+      _error->Error("Connection timed out");
+      return ServerDie(Srv);
+   }
+   
+   // Some kind of exception (error) on the sockets, die
+   if ((FileFD != -1 && FD_ISSET(FileFD,&efds)) || 
+       (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&efds)))
+      return _error->Error("Socket Exception");
+
+   // Handle server IO
+   if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&rfds))
+   {
+      errno = 0;
+      if (Srv->In.Read(Srv->ServerFd) == false)
+	 return ServerDie(Srv);
+   }
+	 
+   if (Srv->ServerFd != -1 && FD_ISSET(Srv->ServerFd,&wfds))
+   {
+      errno = 0;
+      if (Srv->Out.Write(Srv->ServerFd) == false)
+	 return ServerDie(Srv);
+   }
+
+   // Send data to the file
+   if (FileFD != -1 && FD_ISSET(FileFD,&wfds))
+   {
+      if (Srv->In.Write(FileFD) == false)
+	 return _error->Errno("write","Error writing to output file");
+   }
+
+   // Handle commands from APT
+   if (FD_ISSET(STDIN_FILENO,&rfds))
+   {
+      if (Run(true) != 0)
+	 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)
+   {
+      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 || Srv->Encoding == ServerState::Closes)
+	 return true;
+   }
+   return false;
+}
+									/*}}}*/
+// HttpMethod::ServerDie - The server has closed the connection.	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool HttpMethod::ServerDie(ServerState *Srv)
+{
+   // Dump the buffer to the file
+   if (Srv->State == ServerState::Data)
+   {
+      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");
+      }
+   }
+   
+   // See if this is because the server finished the data stream
+   if (Srv->In.IsLimit() == false && Srv->State != ServerState::Header && 
+       Srv->Encoding != ServerState::Closes)
+   {
+      if (errno == 0)
+	 return _error->Error("Error reading from server Remote end closed connection");
+      return _error->Errno("read","Error reading from server");
+   }
+   else
+   {
+      Srv->In.Limit(-1);
+
+      // 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 
+     0 - File is open,
+     1 - IMS hit
+     3 - Unrecoverable error */
+int 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 1;
+   }
+   
+   /* We have a reply we dont handle. This should indicate a perm server
+      failure */
+   if (Srv->Result < 200 || Srv->Result >= 300)
+   {
+      _error->Error("%u %s",Srv->Result,Srv->Code);
+      return 3;
+   }
+
+   // 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 3;
+   
+   // Set the expected size
+   if (Srv->StartPos >= 0)
+   {
+      Res.ResumePoint = Srv->StartPos;
+      ftruncate(File->Fd(),Srv->StartPos);
+   }
+      
+   // Set the start point
+   lseek(File->Fd(),0,SEEK_END);
+
+   delete Srv->In.MD5;
+   Srv->In.MD5 = new MD5Summation;
+   
+   // Fill the MD5 Hash if the file is non-empty (resume)
+   if (Srv->StartPos > 0)
+   {
+      lseek(File->Fd(),0,SEEK_SET);
+      if (Srv->In.MD5->AddFD(File->Fd(),Srv->StartPos) == false)
+      {
+	 _error->Errno("read","Problem hashing file");
+	 return 3;
+      }
+      lseek(File->Fd(),0,SEEK_END);
+   }
+   
+   SetNonBlock(File->Fd(),true);
+   return 0;
+}
+									/*}}}*/
+// HttpMethod::Loop							/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+int HttpMethod::Loop()
+{
+   ServerState *Server = 0;
+   
+   while (1)
+   {
+      // We have no commands, wait for some to arrive
+      if (Queue == 0)
+      {
+	 if (WaitFd(STDIN_FILENO) == false)
+	    return 0;
+      }
+      
+      // Run messages
+      if (Run(true) != 0)
+	 return 100;
+
+      if (Queue == 0)
+	 continue;
+      
+      // Connect to the server
+      if (Server == 0 || Server->Comp(Queue->Uri) == false)
+      {
+	 delete Server;
+	 Server = new ServerState(Queue->Uri,this);
+      }
+            
+      // Connnect to the host
+      if (Server->Open() == false)
+      {
+	 Fail();
+	 continue;
+      }
+      
+      // Queue the request
+      SendReq(Queue,Server->In);
+
+      // Handle the header data
+      if (Server->RunHeaders() == false)
+      {
+	 Fail();
+	 continue;
+      }
+      
+      // Decide what to do.
+      FetchResult Res;
+      switch (DealWithHeaders(Res,Server))
+      {
+	 // Ok, the file is Open
+	 case 0:
+	 {
+	    URIStart(Res);
+
+	    // Run the data
+	    if (Server->RunData() == false)
+	       Fail();
+	 
+	    Res.MD5Sum = Srv->In.MD5->Result();
+	    delete File;
+	    File = 0;
+	    break;
+	 }
+	 
+	 // IMS hit
+	 case 1:
+	 {
+	    URIDone(Res);
+	    break;
+	 }
+	 
+	 // Hard server error, not found or something
+	 case 3:
+	 {
+	    Fail();
+	    break;
+	 }
+	 
+	 default:
+	 Fail("Internal error");
+	 break;
+      }      
+   }
+   
+   return 0;
+}
+									/*}}}*/
+
+int main()
+{
+   HttpMethod Mth;
+   
+   return Mth.Loop();
+}
diff --git a/methods/http.h b/methods/http.h
new file mode 100644
index 000000000..d231aa1f1
--- /dev/null
+++ b/methods/http.h
@@ -0,0 +1,141 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: http.h,v 1.1 1998/11/01 05:30:47 jgg Exp $
+/* ######################################################################
+
+   HTTP Aquire Method - This is the HTTP aquire method for APT.
+
+   ##################################################################### */
+									/*}}}*/
+
+#ifndef APT_HTTP_H
+#define APT_HTTP_H
+
+#define MAXLEN 360
+
+class HttpMethod;
+
+class CircleBuf
+{
+   unsigned char *Buf;
+   unsigned long Size;
+   unsigned long InP;
+   unsigned long OutP;
+   string OutQueue;
+   unsigned long StrPos;
+   unsigned long MaxGet;
+   struct timeval Start;
+   
+   unsigned long LeftRead()
+   {
+      unsigned long Sz = Size - (InP - OutP);
+      if (Sz > Size - (InP%Size))
+	 Sz = Size - (InP%Size);
+      return Sz;
+   }
+   unsigned long LeftWrite()
+   {
+      unsigned long Sz = InP - OutP;
+      if (InP > MaxGet)
+	 Sz = MaxGet - OutP;
+      if (Sz > Size - (OutP%Size))
+	 Sz = Size - (OutP%Size);
+      return Sz;
+   }
+   void FillOut();
+   
+   public:
+   
+   MD5Summation *MD5;
+   
+   // Read data in
+   bool Read(int Fd);
+   bool Read(string Data);
+   
+   // Write data out
+   bool Write(int Fd);
+   bool WriteTillEl(string &Data,bool Single = false);
+   
+   // Control the write limit
+   void Limit(long Max) {if (Max == -1) MaxGet = 0-1; else MaxGet = OutP + Max;}   
+   bool IsLimit() {return MaxGet == OutP;};
+   void Print() {cout << MaxGet << ',' << OutP << endl;};
+
+   // Test for free space in the buffer
+   bool ReadSpace() {return Size - (InP - OutP) > 0;};
+   bool WriteSpace() {return InP - OutP > 0;};
+
+   // Dump everything
+   void Reset();
+   void Stats();
+
+   CircleBuf(unsigned long Size);
+   ~CircleBuf() {delete [] Buf;};
+};
+
+struct ServerState
+{
+   // This is the last parsed Header Line
+   unsigned int Major;
+   unsigned int Minor;
+   unsigned int Result;
+   char Code[MAXLEN];
+   
+   // These are some statistics from the last parsed get line
+   unsigned long Size;
+   signed long StartPos;
+   time_t Date;
+   enum {Chunked,Stream,Closes} Encoding;
+   enum {Header, Data} State;
+   
+   HttpMethod *Owner;
+   
+   // This is the connection itself. Output is data FROM the server
+   CircleBuf In;
+   CircleBuf Out;
+   int ServerFd;
+   URI ServerName;
+  
+   bool HeaderLine(string Line);
+   bool Comp(URI Other) {return Other.Host == ServerName.Host && Other.Port == ServerName.Port;};
+   void Reset() {Major = 0; Minor = 0; Result = 0; Size = 0; StartPos = 0;
+                 Encoding = Closes; time(&Date); ServerFd = -1;};
+   bool RunHeaders();
+   bool RunData();
+   
+   bool Open();
+   bool Close();
+   
+   ServerState(URI Srv,HttpMethod *Owner);
+   ~ServerState() {Close();};
+};
+
+class HttpMethod : public pkgAcqMethod
+{
+   void SendReq(FetchItem *Itm,CircleBuf &Out);
+   bool Go(bool ToFile,ServerState *Srv);
+   bool Flush(ServerState *Srv);
+   bool ServerDie(ServerState *Srv);
+   int DealWithHeaders(FetchResult &Res,ServerState *Srv);
+   
+   public:
+   friend ServerState;
+
+   ServerState *Srv;
+   int Depth;
+   FileFd *File;
+   
+   int Loop();
+   
+   HttpMethod() : pkgAcqMethod("1.2",SingleInstance | Pipeline | SendConfig) 
+   {
+      Depth = 0;
+      Srv = 0;
+      File = 0;
+      Depth = 0;
+   };
+};
+
+URI Proxy;
+
+#endif
diff --git a/methods/makefile b/methods/makefile
index 1656f5700..b05356bb4 100644
--- a/methods/makefile
+++ b/methods/makefile
@@ -23,3 +23,9 @@ PROGRAM=gzip
 SLIBS = -lapt-pkg 
 SOURCE = gzip.cc
 include $(PROGRAM_H)
+
+# The http method
+PROGRAM=http
+SLIBS = -lapt-pkg 
+SOURCE = http.cc
+include $(PROGRAM_H)