fix bug

app/main/views.py

@@ -1132,11 +1132,12 @@ def report(type, id):
         elif (type == "question"):
             url = url_for(".view_question", question_id=id)
         try:
-            send_email_text(current_app.config["ADMIN_EMAIL"], "举报消息",'用户({})举报({}),内容如下:\n{}'.format(user_url, url,form.body.data))
+            send_email_text(current_app.config["ADMIN_EMAIL"], "举报消息",
+                            '用户({})举报({}),内容如下:\n{}'.format(user_url, url, form.body.data))
             flash("举报成功")
-            return redirect(".index")
+            return redirect(request.referrer or url_for('.index'))
         except smtplib.SMTPException:
             flash("举报失败")
-            return redirect(".index")
+            return redirect(request.referrer or url_for('.index'))
     else:
         return render_template("report.html", form=form, id=id, type=type)