imapio: fix payload tracing and handling of continuation responses

* include/mailutils/imapio.h (mu_imapio_create): Change signature. All
uses updated.
(mu_imapio_trace_payload,mu_imapio_get_trace_payload): New protos.
* include/mailutils/sys/imapio.h (_mu_imapio) <_imap_server>
<_imap_trace_payload>: New bits.
* libmailutils/imapio/create.c (mu_imapio_create): Take three arguments,
the third one specifying whether the imapio object is intended for server
or client.
* libmailutils/imapio/getline.c (initial_parse): In server mode, parse
everything at once.
Handle continuation responses in client mode.
(mu_imapio_getline): Toggle MU_XSCRIPT_PAYLOAD only if requested.
* libmailutils/imapio/literal.c: Wait for continuation response (in
client mode).
* libmailutils/imapio/trace.c (mu_imapio_trace_payload)
(mu_imapio_get_trace_payload): New functions.
* libmailutils/tests/imapio.c: New option -server.
* libmailutils/tests/imapio.at: Update literal tests.

@@ -23,7 +23,10 @@ extern "C" {
 
 # include <mailutils/types.h>
 
-int mu_imapio_create (mu_imapio_t *iop, mu_stream_t str);
+#define MU_IMAPIO_CLIENT 0
+#define MU_IMAPIO_SERVER 1
+
+int mu_imapio_create (mu_imapio_t *iop, mu_stream_t str, int server);
 void mu_imapio_free (mu_imapio_t io);
 void mu_imapio_destroy (mu_imapio_t *pio);
   
@@ -41,6 +44,8 @@ int mu_imapio_send_qstring_unfold (struct _mu_imapio *io, const char *buffer,
 int mu_imapio_trace_enable (mu_imapio_t io);
 int mu_imapio_trace_disable (mu_imapio_t io);
 int mu_imapio_get_trace (mu_imapio_t io);
+void mu_imapio_trace_payload (mu_imapio_t io, int val);
+int mu_imapio_get_trace_payload (mu_imapio_t io);
 
 int mu_imapio_getbuf (mu_imapio_t io, char **pptr, size_t *psize);
 

@@ -28,7 +28,9 @@ struct _mu_imapio
   size_t _imap_buf_level;
   struct mu_wordsplit _imap_ws;
   int _imap_ws_flags;
+  int _imap_server:1;
   int _imap_transcript:1;
+  int _imap_trace_payload:1;
   int _imap_reply_ready:1;
 };
   

@@ -21,7 +21,7 @@
 #include <mailutils/sys/imapio.h>
 
 int
-mu_imapio_create (mu_imapio_t *iop, mu_stream_t str)
+mu_imapio_create (mu_imapio_t *iop, mu_stream_t str, int server)
 {
   struct _mu_imapio *io = calloc (1, sizeof (*io));
   if (!io)
@@ -38,6 +38,7 @@ mu_imapio_create (mu_imapio_t *iop, mu_stream_t str)
                        MU_WRDSF_RETURN_DELIMS |
                        MU_WRDSF_WS |
                        MU_WRDSF_APPEND;
+  io->_imap_server = server;
   *iop = io;
   return 0;
 }

@@ -104,16 +104,20 @@ static int
 initial_parse (struct _mu_imapio *io)
 {
   int rc, type;
+  int eat_rest = 0;
 
   if ((rc = mu_wordsplit_len (io->_imap_buf_base, io->_imap_buf_level,
 			      &io->_imap_ws,
-			      io->_imap_ws_flags | MU_WRDSF_INCREMENTAL)))
+			      io->_imap_ws_flags |
+			      (io->_imap_server ? 0 : MU_WRDSF_INCREMENTAL))))
     {
       if (rc == MU_WRDSE_NOINPUT)
 	return IMAPIO_OK;
       return IMAPIO_ERR;
     }
   io->_imap_ws_flags |= MU_WRDSF_REUSE;
+  if (io->_imap_server)
+    return IMAPIO_OK;
   
   if ((rc = mu_wordsplit (NULL, &io->_imap_ws, MU_WRDSF_INCREMENTAL)))
     {
@@ -122,13 +126,20 @@ initial_parse (struct _mu_imapio *io)
       return IMAPIO_ERR;
     }
 
-  if ((type = is_status_response (io->_imap_ws.ws_wordv[1]))
+  if (strcmp (io->_imap_ws.ws_wordv[0], "+") == 0)
+    eat_rest = 1;
+  else if ((type = is_status_response (io->_imap_ws.ws_wordv[1]))
       && (type == STATUS_RESPONSE ||
 	  strcmp (io->_imap_ws.ws_wordv[0], "*") == 0))
     {
       rc = get_response_code (io);
       if (rc)
 	return IMAPIO_ERR;
+      eat_rest = 1;
+    }
+
+  if (eat_rest)
+    {
       while (io->_imap_ws.ws_endp < io->_imap_ws.ws_len &&
 	     mu_isblank (io->_imap_ws.ws_input[io->_imap_ws.ws_endp]))
 	io->_imap_ws.ws_endp++;
@@ -150,6 +161,7 @@ mu_imapio_getline (struct _mu_imapio *io)
 {
   int rc;
   char *last_arg;
+  int xlev = MU_XSCRIPT_NORMAL;
   
   if (io->_imap_reply_ready)
     {
@@ -163,7 +175,7 @@ mu_imapio_getline (struct _mu_imapio *io)
 			      &io->_imap_buf_base, &io->_imap_buf_size,
 			      &io->_imap_buf_level);
       if (rc)
-	return rc;
+	break;
       if (io->_imap_buf_level == 0)
 	break;
       io->_imap_buf_level = mu_rtrim_class (io->_imap_buf_base,
@@ -185,7 +197,10 @@ mu_imapio_getline (struct _mu_imapio *io)
 			     io->_imap_buf_level - io->_imap_ws.ws_endp,
 			     &io->_imap_ws, io->_imap_ws_flags);
       if (rc)
-	return MU_ERR_PARSE;
+	{
+	  rc = MU_ERR_PARSE;
+	  break;
+	}
       
       if (io->_imap_ws.ws_wordc == 0)
 	break;
@@ -196,13 +211,18 @@ mu_imapio_getline (struct _mu_imapio *io)
 	  int rc;
 	  unsigned long number;
 	  char *sp = NULL;
-	  int xlev = mu_imapio_set_xscript_level (io, MU_XSCRIPT_PAYLOAD);
+
+	  if (!io->_imap_trace_payload)
+	    xlev = mu_imapio_set_xscript_level (io, MU_XSCRIPT_PAYLOAD);
 	  
 	  number = strtoul (last_arg + 1, &sp, 10);
 	  /* Client can ask for non-synchronised literal,
 	     if a '+' is appended to the octet count. */
 	  if (*sp == '}')
+	    {
+	      if (io->_imap_server)
 		mu_stream_printf (io->_imap_stream, "+ GO AHEAD\n");
+	    }
 	  else if (*sp != '+')
 	    break;
 
@@ -211,7 +231,10 @@ mu_imapio_getline (struct _mu_imapio *io)
 	      size_t newsize = number + 1;
 	      void *newp = realloc (io->_imap_buf_base, newsize);
 	      if (!newp)
-		return ENOMEM;
+		{
+		  rc = ENOMEM;
+		  break;
+		}
 	      io->_imap_buf_base = newp;
 	      io->_imap_buf_size = newsize;
 	    }
@@ -229,7 +252,7 @@ mu_imapio_getline (struct _mu_imapio *io)
             }
 	  mu_imapio_set_xscript_level (io, xlev);
 	  if (rc)
-	    return rc;
+	    break;
 	  io->_imap_buf_base[io->_imap_buf_level++] = 0;
 
 	  free (last_arg);
@@ -237,12 +260,18 @@ mu_imapio_getline (struct _mu_imapio *io)
 	  if (mu_wordsplit_len (io->_imap_buf_base, io->_imap_buf_level,
 				&io->_imap_ws,
 				io->_imap_ws_flags|MU_WRDSF_NOSPLIT))
-	    return MU_ERR_PARSE;
+	    {
+	      rc = MU_ERR_PARSE;
+	      break;
+	    }
 	}
       else
 	break;
     }
 
+  if (!io->_imap_trace_payload)
+    mu_imapio_set_xscript_level (io, xlev);
+
   io->_imap_reply_ready = 1;
-  return 0;
+  return rc;
 }

@@ -18,6 +18,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <mailutils/types.h>
+#include <mailutils/errno.h>
 #include <mailutils/imapio.h>
 #include <mailutils/sys/imapio.h>
 #include <mailutils/stream.h>
@@ -25,7 +26,18 @@
 int
 mu_imapio_send_literal (struct _mu_imapio *io, const char *buffer)
 {
-  return mu_stream_printf (io->_imap_stream,
-			   "{%lu}\n%s", (unsigned long) strlen (buffer),
-			   buffer);
+  size_t len = strlen (buffer);
+
+  mu_stream_printf (io->_imap_stream, "{%lu}\n", (unsigned long) len);
+
+  if (!io->_imap_server)
+    {
+      int rc = mu_imapio_getline (io);
+      if (rc)
+	return rc;
+      if (!(io->_imap_reply_ready && io->_imap_ws.ws_wordv[0][0] == '+'))
+	return MU_ERR_BADREPLY;
+    }
+
+  return mu_stream_write (io->_imap_stream, buffer, len, NULL);
 }

@@ -84,3 +84,15 @@ mu_imapio_get_trace (mu_imapio_t io)
 {
   return io ? io->_imap_transcript : 0; 
 }
+
+void
+mu_imapio_trace_payload (mu_imapio_t io, int val)
+{
+  io->_imap_trace_payload = !!val;
+}
+
+int
+mu_imapio_get_trace_payload (mu_imapio_t io)
+{
+  return io ? io->_imap_trace_payload : 0;
+}

@@ -16,6 +16,8 @@
 
 AT_BANNER(IMAP IO)
 
+m4_pushdef([IMAPIO_FLAGS])
+
 dnl ------------------------------------------------------------
 dnl IMAPIO([NAME], [KW = `'], [INPUT], [STDOUT = `'],
 dnl        [STDERR = `'])
@@ -23,7 +25,7 @@ dnl
 m4_pushdef([IMAPIO],[
 m4_pushdef([MU_TEST_GROUP],[imapio])
 m4_pushdef([MU_TEST_KEYWORDS],[imapio])
-m4_pushdef([MU_TEST_COMMAND],[imapio])
+m4_pushdef([MU_TEST_COMMAND],[imapio IMAPIO_FLAGS])
 MU_GENERIC_TEST([$1],[$2],[$3],[],[$4],[$5])
 m4_popdef([MU_TEST_COMMAND])
 m4_popdef([MU_TEST_KEYWORDS])
@@ -78,7 +80,21 @@ IMAPIO([server response with code],[],
 6: 'Predicted next uid'
 ])
 
-IMAPIO([literals],[literal],
+IMAPIO([literals (client)],[literal],
+[A001 LOGIN {11}
+FRED FOOBAR {7}
+fat man
+],
+[],
+[4
+0: 'A001'
+1: 'LOGIN'
+2: 'FRED FOOBAR'
+3: 'fat man'
+])
+
+m4_pushdef([IMAPIO_FLAGS],[-server])
+IMAPIO([literals (server)],[literal],
 [A001 LOGIN {11}
 FRED FOOBAR {7}
 fat man
@@ -93,7 +109,7 @@ fat man
 3: 'fat man'
 ])
 
-IMAPIO([non-synch literals],[literal],
+IMAPIO([non-synchronized literals (server)],[literal],
 [A001 LOGIN {11+}
 FRED FOOBAR {7+}
 fat man
@@ -105,6 +121,9 @@ fat man
 2: 'FRED FOOBAR'
 3: 'fat man'
 ])
+m4_popdef([IMAPIO_FLAGS])
 
 dnl ------------------------------------------------------------
 m4_popdef([IMAPIO])
+m4_pushdef([IMAPIO_FLAGS])
+

@@ -29,7 +29,7 @@
 void
 usage ()
 {
-  mu_stream_printf (mu_strout, "usage: %s [debug=SPEC] [-transcript]\n",
+  mu_stream_printf (mu_strout, "usage: %s [debug=SPEC] [-transcript] [-server]\n",
 		    mu_program_name);
   exit (0);
 }
@@ -41,6 +41,7 @@ main (int argc, char **argv)
   int transcript = 0;
   mu_imapio_t io;
   mu_stream_t str;
+  int imapio_mode = MU_IMAPIO_CLIENT;
   
   mu_stdstream_setup (MU_STDSTREAM_RESET_NONE);
   
@@ -52,6 +53,8 @@ main (int argc, char **argv)
 	mu_debug_parse_spec (opt + 6);
       else if (strcmp (opt, "-transcript") == 0)
 	transcript = 1;
+      else if (strcmp (opt, "-server") == 0)
+	imapio_mode = MU_IMAPIO_SERVER;
       else if (strcmp (opt, "-h") == 0)
 	usage ();
       else
@@ -64,7 +67,7 @@ main (int argc, char **argv)
   MU_ASSERT (mu_iostream_create (&str, mu_strin, mu_strout));
 
   
-  MU_ASSERT (mu_imapio_create (&io, str));
+  MU_ASSERT (mu_imapio_create (&io, str, imapio_mode));
 
   if (transcript)
     mu_imapio_trace_enable (io);