Fix problem with concurrent posts as reported in ietf-tools#813 by preventing

accidentally submitting a post twice (with Javascript) and modifying the
move-old-files-to-archive code to not move the files away if they
belong to the same submission as the one we're accepting (this
mitigates a concurrent post to at least not end up with a non-existing
draft).
 - Legacy-Id: 4112

Author: OleLaursen

ietf/submit/utils.py

@@ -154,8 +154,9 @@ def perform_postREDESIGN(request, submission):
     e.save()
 
     # clean up old files
-    from ietf.idrfc.expire import move_draft_files_to_archive
-    move_draft_files_to_archive(draft, prev_rev)
+    if prev_rev != draft.rev:
+        from ietf.idrfc.expire import move_draft_files_to_archive
+        move_draft_files_to_archive(draft, prev_rev)
 
     # automatic state changes
     state_change_msg = ""

ietf/templates/submit/draft_status.html

@@ -245,3 +245,14 @@ <h2>Cancel submission</h2>
 <br>Please send problem reports to <a href="mailto:ietf-action@ietf.org">ietf-action@ietf.org</a>.
 </p>
 {% endblock %}
+
+{% block scripts %}
+jQuery(function () {
+    jQuery("form").submit(function() {
+        if (this.submittedAlready)
+            return false;
+        else
+            this.submittedAlready = true;
+    });
+});
+{% endblock %}

ietf/templates/submit/last_confirmation_step.html

@@ -13,3 +13,14 @@ <h2>Confirm auto-post</h2>
 <input type="submit" value="Auto-Post" />
 </form>
 {% endblock %}
+
+{% block scripts %}
+jQuery(function () {
+    jQuery("form").submit(function() {
+        if (this.submittedAlready)
+            return false;
+        else
+            this.submittedAlready = true;
+    });
+});
+{% endblock %}