static gboolean
nntp_folder_append_message_sync (CamelFolder *folder,
                                 CamelMimeMessage *message,
                                 CamelMessageInfo *info,
                                 gchar **appended_uid,
                                 GCancellable *cancellable,
                                 GError **error)
{
	CamelStore *parent_store;
	CamelNNTPStore *nntp_store;
	CamelNNTPStream *nntp_stream = NULL;
	CamelStream *filtered_stream;
	CamelMimeFilter *crlffilter;
	gint ret;
	guint u;
	struct _camel_header_raw *header, *savedhdrs, *n, *tail;
	const gchar *full_name;
	gchar *group, *line;
	gboolean success = TRUE;
	GError *local_error = NULL;

	full_name = camel_folder_get_full_name (folder);
	parent_store = camel_folder_get_parent_store (folder);

	nntp_store = CAMEL_NNTP_STORE (parent_store);

	/* send 'POST' command */
	ret = camel_nntp_command (
		nntp_store, cancellable, error, NULL, &line, "post");
	if (ret != 340) {
		if (ret == 440) {
			g_set_error (
				error, CAMEL_FOLDER_ERROR,
				CAMEL_FOLDER_ERROR_INSUFFICIENT_PERMISSION,
				_("Posting failed: %s"), line);
			success = FALSE;
		} else if (ret != -1) {
			g_set_error (
				error, CAMEL_ERROR,
				CAMEL_ERROR_GENERIC,
				_("Posting failed: %s"), line);
			success = FALSE;
		}
		goto exit;
	}

	/* the 'Newsgroups: ' header */
	group = g_strdup_printf ("Newsgroups: %s\r\n", full_name);

	/* remove mail 'To', 'CC', and 'BCC' headers */
	savedhdrs = NULL;
	tail = (struct _camel_header_raw *) &savedhdrs;

	header = (struct _camel_header_raw *) &CAMEL_MIME_PART (message)->headers;
	n = header->next;
	while (n != NULL) {
		if (!g_ascii_strcasecmp (n->name, "To") || !g_ascii_strcasecmp (n->name, "Cc") || !g_ascii_strcasecmp (n->name, "Bcc")) {
			header->next = n->next;
			tail->next = n;
			n->next = NULL;
			tail = n;
		} else {
			header = n;
		}

		n = header->next;
	}

	nntp_stream = camel_nntp_store_ref_stream (nntp_store);

	/* setup stream filtering */
	filtered_stream = camel_stream_filter_new (CAMEL_STREAM (nntp_stream));
	crlffilter = camel_mime_filter_crlf_new (
		CAMEL_MIME_FILTER_CRLF_ENCODE,
		CAMEL_MIME_FILTER_CRLF_MODE_CRLF_DOTS);
	camel_stream_filter_add (
		CAMEL_STREAM_FILTER (filtered_stream), crlffilter);
	g_object_unref (crlffilter);

	/* write the message */
	if (local_error == NULL)
		camel_stream_write (
			CAMEL_STREAM (nntp_stream),
			group, strlen (group),
			cancellable, &local_error);
	if (local_error == NULL)
		camel_data_wrapper_write_to_stream_sync (
			CAMEL_DATA_WRAPPER (message),
			filtered_stream, cancellable, &local_error);
	if (local_error == NULL)
		camel_stream_flush (
			filtered_stream, cancellable, &local_error);
	if (local_error == NULL)
		camel_stream_write (
			CAMEL_STREAM (nntp_stream),
			"\r\n.\r\n", 5,
			cancellable, &local_error);
	if (local_error == NULL)
		camel_nntp_stream_line (
			nntp_stream, (guchar **) &line,
			&u, cancellable, &local_error);
	if (local_error == NULL && atoi (line) != 240)
		local_error = g_error_new_literal (
			CAMEL_ERROR, CAMEL_ERROR_GENERIC, line);

	if (local_error != NULL) {
		g_propagate_prefixed_error (
			error, local_error, _("Posting failed: "));
		success = FALSE;
	}

	g_object_unref (filtered_stream);
	g_free (group);
	header->next = savedhdrs;

exit:
	g_clear_object (&nntp_stream);

	return success;
}
static void
nntp_folder_append_message_online (CamelFolder *folder, CamelMimeMessage *mime_message,
				   const CamelMessageInfo *info, char **appended_uid,
				   CamelException *ex)
{
	CamelNNTPStore *nntp_store = (CamelNNTPStore *) folder->parent_store;
	CamelStream *stream = (CamelStream*)nntp_store->stream;
	CamelStreamFilter *filtered_stream;
	CamelMimeFilter *crlffilter;
	int ret;
	unsigned int u;
	struct _camel_header_raw *header, *savedhdrs, *n, *tail;
	char *group, *line;

	CAMEL_SERVICE_REC_LOCK(nntp_store, connect_lock);

	/* send 'POST' command */
	ret = camel_nntp_command (nntp_store, ex, NULL, &line, "post");
	if (ret != 340) {
		if (ret == 440)
			camel_exception_setv (ex, CAMEL_EXCEPTION_FOLDER_INSUFFICIENT_PERMISSION,
					      _("Posting failed: %s"), line);
		else if (ret != -1)
			camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
					      _("Posting failed: %s"), line);
		CAMEL_SERVICE_REC_UNLOCK(nntp_store, connect_lock);
		return;
	}

	/* the 'Newsgroups: ' header */
	group = g_strdup_printf ("Newsgroups: %s\r\n", folder->full_name);

	/* setup stream filtering */
	crlffilter = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_ENCODE, CAMEL_MIME_FILTER_CRLF_MODE_CRLF_DOTS);
	filtered_stream = camel_stream_filter_new_with_stream (stream);
	camel_stream_filter_add (filtered_stream, crlffilter);
	camel_object_unref (crlffilter);

	/* remove mail 'To', 'CC', and 'BCC' headers */
	savedhdrs = NULL;
	tail = (struct _camel_header_raw *) &savedhdrs;

	header = (struct _camel_header_raw *) &CAMEL_MIME_PART (mime_message)->headers;
	n = header->next;
	while (n != NULL) {
		if (!g_ascii_strcasecmp (n->name, "To") || !g_ascii_strcasecmp (n->name, "Cc") || !g_ascii_strcasecmp (n->name, "Bcc")) {
			header->next = n->next;
			tail->next = n;
			n->next = NULL;
			tail = n;
		} else {
			header = n;
		}

		n = header->next;
	}

	/* write the message */
	if (camel_stream_write(stream, group, strlen(group)) == -1
	    || camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (mime_message), CAMEL_STREAM (filtered_stream)) == -1
	    || camel_stream_flush (CAMEL_STREAM (filtered_stream)) == -1
	    || camel_stream_write (stream, "\r\n.\r\n", 5) == -1
	    || (ret = camel_nntp_stream_line (nntp_store->stream, (unsigned char **)&line, &u)) == -1) {
		if (errno == EINTR)
			camel_exception_setv (ex, CAMEL_EXCEPTION_USER_CANCEL, _("User canceled"));
		else
			camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, _("Posting failed: %s"), g_strerror (errno));
	} else if (atoi(line) != 240) {
		camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM, _("Posting failed: %s"), line);
	}

	camel_object_unref (filtered_stream);
	g_free(group);
	header->next = savedhdrs;

	CAMEL_SERVICE_REC_UNLOCK(nntp_store, connect_lock);

	return;
}