diff --git a/panda/src/downloader/bioStream.cxx b/panda/src/downloader/bioStream.cxx
index a1787080d6..04a5de966c 100644
--- a/panda/src/downloader/bioStream.cxx
+++ b/panda/src/downloader/bioStream.cxx
@@ -104,4 +104,20 @@ close() {
   _buf.close();
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: IBioStream::get_read_state
+//       Access: Public, Virtual
+//  Description: Returns an enum indicating how we are coming along in
+//               reading the document.
+////////////////////////////////////////////////////////////////////
+IBioStream::ReadState IBioStream::
+get_read_state() {
+  // For an IBioStream, this method is meaningless, and always returns
+  // RS_error.
+
+  // This method is intended for those specialized streams that scan
+  // through an HTTP document.
+  return RS_error;
+}
+
 #endif  // HAVE_OPENSSL
diff --git a/panda/src/downloader/bioStream.h b/panda/src/downloader/bioStream.h
index 1c386856ce..43e8ec0720 100644
--- a/panda/src/downloader/bioStream.h
+++ b/panda/src/downloader/bioStream.h
@@ -45,6 +45,7 @@ public:
 
   virtual bool is_closed();
   virtual void close();
+  virtual ReadState get_read_state();
 
 private:
   BioStreamBuf _buf;
diff --git a/panda/src/downloader/chunkedStream.cxx b/panda/src/downloader/chunkedStream.cxx
index 6e10d9d522..ba4b75f8f6 100644
--- a/panda/src/downloader/chunkedStream.cxx
+++ b/panda/src/downloader/chunkedStream.cxx
@@ -48,4 +48,15 @@ close() {
   _buf.close_read();
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: IChunkedStream::get_read_state
+//       Access: Public, Virtual
+//  Description: Returns an enum indicating how we are coming along in
+//               reading the document.
+////////////////////////////////////////////////////////////////////
+IChunkedStream::ReadState IChunkedStream::
+get_read_state() {
+  return _buf.get_read_state();
+}
+
 #endif  // HAVE_OPENSSL
diff --git a/panda/src/downloader/chunkedStream.h b/panda/src/downloader/chunkedStream.h
index 3a6b9fe2ae..c24bc074b3 100644
--- a/panda/src/downloader/chunkedStream.h
+++ b/panda/src/downloader/chunkedStream.h
@@ -48,6 +48,7 @@ public:
 
   virtual bool is_closed();
   virtual void close();
+  virtual ReadState get_read_state();
 
 private:
   ChunkedStreamBuf _buf;
diff --git a/panda/src/downloader/chunkedStreamBuf.I b/panda/src/downloader/chunkedStreamBuf.I
index 8a24f03e5e..27d6c33e21 100644
--- a/panda/src/downloader/chunkedStreamBuf.I
+++ b/panda/src/downloader/chunkedStreamBuf.I
@@ -26,3 +26,13 @@ INLINE bool ChunkedStreamBuf::
 is_closed() const {
   return (_source == (BioStreamPtr *)NULL || (*_source)->is_closed());
 }
+
+////////////////////////////////////////////////////////////////////
+//     Function: ChunkedStreamBuf::get_read_state
+//       Access: Public
+//  Description:
+////////////////////////////////////////////////////////////////////
+INLINE ISocketStream::ReadState ChunkedStreamBuf::
+get_read_state() const {
+  return _read_state;
+}
diff --git a/panda/src/downloader/chunkedStreamBuf.cxx b/panda/src/downloader/chunkedStreamBuf.cxx
index 8b46eeecaf..27e7f5ff91 100644
--- a/panda/src/downloader/chunkedStreamBuf.cxx
+++ b/panda/src/downloader/chunkedStreamBuf.cxx
@@ -37,6 +37,7 @@ ChunkedStreamBuf::
 ChunkedStreamBuf() {
   _chunk_remaining = 0;
   _done = true;
+  _read_state = ISocketStream::RS_initial;
 
 #ifdef HAVE_IOSTREAM
   char *buf = new char[4096];
@@ -74,6 +75,7 @@ open_read(BioStreamPtr *source, HTTPChannel *doc) {
   nassertv(!_source.is_null());
   _chunk_remaining = 0;
   _done = false;
+  _read_state = ISocketStream::RS_reading;
   _doc = doc;
 
   if (_doc != (HTTPChannel *)NULL) {
@@ -154,9 +156,7 @@ read_chars(char *start, size_t length) {
 
     if (read_count == 0 && (*_source)->is_closed()) {
       // Whoops, the socket closed while we were downloading.
-      if (_doc != (HTTPChannel *)NULL && _read_index == _doc->_read_index) {
-        _doc->_state = HTTPChannel::S_failure;
-      }
+      _read_state = ISocketStream::RS_error;
     }
 
     return read_count;
@@ -175,9 +175,7 @@ read_chars(char *start, size_t length) {
     // EOF (or data unavailable) while trying to read the chunk size.
     if ((*_source)->is_closed()) {
       // Whoops, the socket closed while we were downloading.
-      if (_doc != (HTTPChannel *)NULL && _read_index == _doc->_read_index) {
-        _doc->_state = HTTPChannel::S_failure;
-      }
+      _read_state = ISocketStream::RS_error;
     }
     return 0;
   }
@@ -192,9 +190,7 @@ read_chars(char *start, size_t length) {
     _done = true;
     _doc->_file_size = _doc->_transfer_file_size;
     _doc->_got_file_size = true;
-    if (_doc != (HTTPChannel *)NULL && _read_index == _doc->_read_index) {
-      _doc->finished_body(true);
-    }
+    _read_state = ISocketStream::RS_complete;
     return 0;
   }
 
diff --git a/panda/src/downloader/chunkedStreamBuf.h b/panda/src/downloader/chunkedStreamBuf.h
index 66dec0280a..38213398d1 100644
--- a/panda/src/downloader/chunkedStreamBuf.h
+++ b/panda/src/downloader/chunkedStreamBuf.h
@@ -43,6 +43,7 @@ public:
   void close_read();
 
   INLINE bool is_closed() const;
+  INLINE ISocketStream::ReadState get_read_state() const;
 
 protected:
   virtual int underflow();
@@ -55,6 +56,7 @@ private:
   size_t _chunk_remaining;
   bool _done;
   string _working_getline;
+  ISocketStream::ReadState _read_state;
 
   PT(HTTPChannel) _doc;
   int _read_index;
diff --git a/panda/src/downloader/httpChannel.cxx b/panda/src/downloader/httpChannel.cxx
index 29ed1aafae..8a52c99bb5 100644
--- a/panda/src/downloader/httpChannel.cxx
+++ b/panda/src/downloader/httpChannel.cxx
@@ -830,7 +830,6 @@ reached_done_state() {
       }
       _started_download = true;
 
-
       _done_state = S_read_trailer;
       _last_run_time = TrueClock::get_global_ptr()->get_short_time();
       return true;
@@ -2097,6 +2096,17 @@ run_download_to_file() {
 
   _download_to_file.flush();
 
+  switch (_body_stream->get_read_state()) {
+  case ISocketStream::RS_complete:
+    finished_body(false);
+    break;
+
+  case ISocketStream::RS_error:
+    _state = HTTPChannel::S_failure;
+    _status_entry._status_code = HTTPChannel::SC_lost_connection;
+    break;
+  }
+
   if (_body_stream->is_closed()) {
     // Done.
     _download_to_file.close();
@@ -2147,6 +2157,17 @@ run_download_to_ram() {
     count = _body_stream->gcount();
   }
 
+  switch (_body_stream->get_read_state()) {
+  case ISocketStream::RS_complete:
+    finished_body(false);
+    break;
+
+  case ISocketStream::RS_error:
+    _state = HTTPChannel::S_failure;
+    _status_entry._status_code = HTTPChannel::SC_lost_connection;
+    break;
+  }
+
   if (_body_stream->is_closed()) {
     // Done.
     _started_download = false;
diff --git a/panda/src/downloader/identityStream.I b/panda/src/downloader/identityStream.I
index dec1f077d7..5f1896f1a0 100644
--- a/panda/src/downloader/identityStream.I
+++ b/panda/src/downloader/identityStream.I
@@ -48,6 +48,6 @@ INLINE IIdentityStream &IIdentityStream::
 open(BioStreamPtr *source, HTTPChannel *doc, 
      bool has_content_length, size_t content_length) {
   clear((ios_iostate)0);
-  _buf.open_read(source, doc, has_content_length, content_length);
+  _buf.open_read(source, has_content_length, content_length);
   return *this;
 }
diff --git a/panda/src/downloader/identityStream.cxx b/panda/src/downloader/identityStream.cxx
index a11c1fe501..f95e8ffa64 100644
--- a/panda/src/downloader/identityStream.cxx
+++ b/panda/src/downloader/identityStream.cxx
@@ -49,4 +49,15 @@ close() {
   _buf.close_read();
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: IIdentityStream::get_read_state
+//       Access: Public, Virtual
+//  Description: Returns an enum indicating how we are coming along in
+//               reading the document.
+////////////////////////////////////////////////////////////////////
+INLINE IIdentityStream::ReadState IIdentityStream::
+get_read_state() {
+  return _buf.get_read_state();
+}
+
 #endif  // HAVE_OPENSSL
diff --git a/panda/src/downloader/identityStream.h b/panda/src/downloader/identityStream.h
index 4b7544d4e0..5e258e2d7e 100644
--- a/panda/src/downloader/identityStream.h
+++ b/panda/src/downloader/identityStream.h
@@ -55,6 +55,7 @@ public:
 
   virtual bool is_closed();
   virtual void close();
+  virtual ReadState get_read_state();
 
 private:
   IdentityStreamBuf _buf;
diff --git a/panda/src/downloader/identityStreamBuf.I b/panda/src/downloader/identityStreamBuf.I
index 9941c76c98..a5a087926a 100644
--- a/panda/src/downloader/identityStreamBuf.I
+++ b/panda/src/downloader/identityStreamBuf.I
@@ -26,3 +26,13 @@ INLINE bool IdentityStreamBuf::
 is_closed() const {
   return (_source == (BioStreamPtr *)NULL || (*_source)->is_closed());
 }
+
+////////////////////////////////////////////////////////////////////
+//     Function: IdentityStreamBuf::get_read_state
+//       Access: Public
+//  Description:
+////////////////////////////////////////////////////////////////////
+INLINE ISocketStream::ReadState IdentityStreamBuf::
+get_read_state() const {
+  return _read_state;
+}
diff --git a/panda/src/downloader/identityStreamBuf.cxx b/panda/src/downloader/identityStreamBuf.cxx
index 1b253f56d7..651beda7b1 100644
--- a/panda/src/downloader/identityStreamBuf.cxx
+++ b/panda/src/downloader/identityStreamBuf.cxx
@@ -35,6 +35,7 @@ IdentityStreamBuf::
 IdentityStreamBuf() {
   _has_content_length = true;
   _bytes_remaining = 0;
+  _read_state = ISocketStream::RS_initial;
 
 #ifdef HAVE_IOSTREAM
   char *buf = new char[4096];
@@ -67,16 +68,12 @@ IdentityStreamBuf::
 //               from the identity encoding.
 ////////////////////////////////////////////////////////////////////
 void IdentityStreamBuf::
-open_read(BioStreamPtr *source, HTTPChannel *doc, 
+open_read(BioStreamPtr *source, 
           bool has_content_length, size_t content_length) {
   _source = source;
-  _doc = doc;
   _has_content_length = has_content_length;
   _bytes_remaining = content_length;
-
-  if (_doc != (HTTPChannel *)NULL) {
-    _read_index = doc->_read_index;
-  }
+  _read_state = ISocketStream::RS_reading;
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -142,9 +139,7 @@ read_chars(char *start, size_t length) {
     if (read_count == 0) {
       if ((*_source)->is_closed()) {
         // socket closed; we're done.
-        if (_doc != (HTTPChannel *)NULL && _read_index == _doc->_read_index) {
-          _doc->finished_body(false);
-        }
+        _read_state = ISocketStream::RS_complete;
       }
       return 0;
     }
@@ -162,10 +157,7 @@ read_chars(char *start, size_t length) {
       if (read_count == 0) {
         if ((*_source)->is_closed()) {
           // socket closed unexpectedly; problem.
-          if (_doc != (HTTPChannel *)NULL && _read_index == _doc->_read_index) {
-            _doc->_state = HTTPChannel::S_failure;
-            _doc->_status_entry._status_code = HTTPChannel::SC_lost_connection;
-          }
+          _read_state = ISocketStream::RS_error;
         }
         return 0;
       }
@@ -173,9 +165,7 @@ read_chars(char *start, size_t length) {
       
     if (_bytes_remaining == 0) {
       // We're done.
-      if (_doc != (HTTPChannel *)NULL && _read_index == _doc->_read_index) {
-        _doc->finished_body(false);
-      }
+      _read_state = ISocketStream::RS_complete;
     }
   }
 
diff --git a/panda/src/downloader/identityStreamBuf.h b/panda/src/downloader/identityStreamBuf.h
index 51cfd9067c..2d155cf0ce 100644
--- a/panda/src/downloader/identityStreamBuf.h
+++ b/panda/src/downloader/identityStreamBuf.h
@@ -24,9 +24,9 @@
 // This module is not compiled if OpenSSL is not available.
 #ifdef HAVE_OPENSSL
 
-#include "httpChannel.h"
 #include "bioStreamPtr.h"
 #include "pointerTo.h"
+#include "socketStream.h"
 
 ////////////////////////////////////////////////////////////////////
 //       Class : IdentityStreamBuf
@@ -38,11 +38,12 @@ public:
   IdentityStreamBuf();
   virtual ~IdentityStreamBuf();
 
-  void open_read(BioStreamPtr *source, HTTPChannel *doc,
+  void open_read(BioStreamPtr *source,
                  bool has_content_length, size_t content_length);
   void close_read();
 
   INLINE bool is_closed() const;
+  INLINE ISocketStream::ReadState get_read_state() const;
 
 protected:
   virtual int underflow();
@@ -53,9 +54,7 @@ private:
   PT(BioStreamPtr) _source;
   bool _has_content_length;
   size_t _bytes_remaining;
-
-  PT(HTTPChannel) _doc;
-  int _read_index;
+  ISocketStream::ReadState _read_state;
 
   friend class IIdentityStream;
 };
diff --git a/panda/src/downloader/socketStream.h b/panda/src/downloader/socketStream.h
index 1485e01c5d..2e47da47fa 100644
--- a/panda/src/downloader/socketStream.h
+++ b/panda/src/downloader/socketStream.h
@@ -126,8 +126,16 @@ public:
   INLINE ISocketStream(streambuf *buf);
 
 PUBLISHED:
+  enum ReadState {
+    RS_initial,
+    RS_reading,
+    RS_complete,
+    RS_error,
+  };
+
   virtual bool is_closed() = 0;
   virtual void close() = 0;
+  virtual ReadState get_read_state() = 0;
 };
 
 ////////////////////////////////////////////////////////////////////