server: document and test for simplejson

flask uses itsdangerous which uses simplejson
The default json converts namedtuples to arrays stripping the names.
simplejson converts them to a dictionary, a behavior we rely on.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/server/rz_server.py b/src/server/rz_server.py
index 569eb7e3..df10d5a2 100644
--- a/src/server/rz_server.py
+++ b/src/server/rz_server.py
@@ -11,6 +11,12 @@ import flask
 import crypt_util
 import re
 
+try:
+    import simplejson # we don't use it but we rely on it
+except:
+    print("missing simplejson, which is required due to namedtuple usage")
+    raise SystemExit
+
 from flask import Flask
 from flask import Response
 from flask import session