imap4d: fetch body with a nonempty section spec returns section body without headers.

* imap4d/fetch.c (fetch_function_closure) <section_tag>: New member.
(_frt_body_text): Output ffc->section_tag after the secion part by
default.
(_frt_header, _frt_mime): Remove.
(_frt_header0): Rewrite as a general-purpose _frt_header function.
(parse_section_text): Set _frt_header as a driver function and
set section_tag accordingly, instead of selecting _frt_header/_frt_mime.
Set section_tag when selecting _frt_body_text.
(parse_section): Default to _frt_body_text and fall back to _frt_body
only when an empty section specifier is given.
* imap4d/testsuite/imap4d/fetch.exp: Update accordingly.

@@ -49,6 +49,7 @@ struct fetch_function_closure
 {
   fetch_function_t fun;            /* Handler function */
   const char *name;                /* Response tag */
+  const char *section_tag;          
   size_t *section_part;            /* Section-part */
   size_t nset;                     /* Number of elements in section_part */
   int peek;
@@ -906,7 +907,7 @@ _frt_body_text (struct fetch_function_closure *ffc,
   if (ffc->name)
     util_send ("%s",  ffc->name);
   else
-    fetch_send_section_part (ffc, "TEXT", 1);
+    fetch_send_section_part (ffc, ffc->section_tag, 1);
   msg = fetch_get_part (ffc, frt);
   if (!msg)
     {
@@ -935,9 +936,8 @@ _frt_size (struct fetch_function_closure *ffc,
 }
 
 static int
-_frt_header0 (struct fetch_function_closure *ffc,
-	      struct fetch_runtime_closure *frt,
-	      const char *suffix)
+_frt_header (struct fetch_function_closure *ffc,
+	     struct fetch_runtime_closure *frt)
 {
   mu_message_t msg;
   mu_header_t header = NULL;
@@ -946,9 +946,9 @@ _frt_header0 (struct fetch_function_closure *ffc,
   
   set_seen (ffc, frt);
   if (ffc->name)
-    util_send ("%s",  ffc->name);
+    util_send ("%s", ffc->name);
   else
-    fetch_send_section_part (ffc, suffix, 1);
+    fetch_send_section_part (ffc, ffc->section_tag, 1);
 
   msg = fetch_get_part (ffc, frt);
   if (!msg)
@@ -964,20 +964,6 @@ _frt_header0 (struct fetch_function_closure *ffc,
 }
 
 static int
-_frt_header (struct fetch_function_closure *ffc,
-	     struct fetch_runtime_closure *frt)
-{
-  return _frt_header0 (ffc, frt, "HEADER");
-}
-
-static int
-_frt_mime (struct fetch_function_closure *ffc,
-	   struct fetch_runtime_closure *frt)
-{
-  return _frt_header0 (ffc, frt, "MIME");
-}
-
-static int
 _send_header_name (void *item, void *data)
 {
   int *pf = data;
@@ -1291,17 +1277,22 @@ parse_section_text (imap4d_parsebuf_t p, struct fetch_function_closure *ffc,
 	  parse_header_list (p, ffc);
 	}
       else
-	ffc->fun = _frt_header;
+	{
+	  ffc->fun = _frt_header;
+	  ffc->section_tag = "HEADER";
+	}
     }
   else if (mu_c_strcasecmp (p->token, "TEXT") == 0)
     {
       imap4d_parsebuf_next (p, 1);
       ffc->fun = _frt_body_text;
+      ffc->section_tag = "TEXT";
     }
   else if (allow_mime && mu_c_strcasecmp (p->token, "MIME") == 0)
     {
       imap4d_parsebuf_next (p, 1);
-      ffc->fun = _frt_mime;
+      ffc->fun = _frt_header;
+      ffc->section_tag = "MIME";
     }
   else
     return 1;
@@ -1375,12 +1366,12 @@ parse_section (imap4d_parsebuf_t p, struct fetch_function_closure *ffc)
     return 1;
   ffc_init (ffc);
   ffc->name = NULL;
-  ffc->fun = _frt_body;
+  ffc->fun = _frt_body_text;
   imap4d_parsebuf_next (p, 1);
   if (parse_section_text (p, ffc, 0))
     {
       if (p->token[0] == ']')
-	/* OK */;
+	ffc->fun = _frt_body;
       else if (mu_isdigit (p->token[0]))
 	{
 	  parse_section_part (p, ffc);

@@ -330,13 +330,8 @@ imap4d_test "FETCH 3 BODY\[1.MIME\]"\
 "OK"
 
 imap4d_test "FETCH 4 BODY\[2.2.1\]"\
-"4 FETCH (FLAGS (\\Seen) BODY\[2.2.1\] {680}"\
+"4 FETCH (FLAGS (\\Seen) BODY\[2.2.1\] {490}"\
 -literal\
-"Content-Type: application/octet-stream; name=\"msg.23\""\
-"Content-ID: <5122.1026510654.6@Mirddin.farlep.net>"\
-"Content-Description: Father William Part III"\
-"Content-Transfer-Encoding: base64"\
-""\
 "YFlvdSBhcmUgb2xkLCcgc2FpZCB0aGUgeW91dGgsIGBhbmQgeW91ciBqYXdzIGFyZSB0b28gd2Vh"\
 "awpGb3IgYW55dGhpbmcgdG91Z2hlciB0aGFuIHN1ZXQ7CllldCB5b3UgZmluaXNoZWQgdGhlIGdv"\
 "b3NlLCB3aXRoIHRoZSBib25lcyBhbmQgdGhlIGJlYWstLQpQcmF5IGhvdyBkaWQgeW91IG1hbmFn"\