From ef45c205585f101b25f1610e9c1327b783518a9f Mon Sep 17 00:00:00 2001
From: Karel Vervaeke <karel@ngdata.com>
Date: Sun, 3 Apr 2016 16:33:43 +0200
Subject: [PATCH] Hash cache keys to avoid too keys being too long. Resolves
 #240

---
 caravel/viz.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/caravel/viz.py b/caravel/viz.py
index 7d863fde321dd..e5cbcc49f334c 100644
--- a/caravel/viz.py
+++ b/caravel/viz.py
@@ -9,6 +9,7 @@
 import json
 import logging
 import uuid
+import hashlib
 
 from flask import flash, request, Markup
 from markdown import markdown
@@ -265,7 +266,8 @@ def json_endpoint(self):
 
     @property
     def cache_key(self):
-        return self.get_url(json="true", force="false")
+        url = self.get_url(json="true", force="false")
+        return hashlib.md5(url).hexdigest()
 
     @property
     def csv_endpoint(self):