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Prevent browsers caching responses. Fixes #1171

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This commit is contained in:
Dave Page 2016-09-21 16:18:22 +01:00
parent 7a40171300
commit 2077bd5fdc
1 changed files with 16 additions and 2 deletions
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18
web/pgadmin/utils/ajax.py
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@ -29,6 +29,18 @@ class DataTypeJSONEncoder(json.JSONEncoder):
return json.JSONEncoder.default(self, obj) return json.JSONEncoder.default(self, obj)
def get_no_cache_header():
"""
Prevent browser from caching data every time an
http request is made.
Returns: headers
"""
headers = {}
headers["Cache-Control"] = "no-cache, no-store, must-revalidate" # HTTP 1.1.
headers["Pragma"] = "no-cache" # HTTP 1.0.
headers["Expires"] = "0" # Proxies.
return headers
def make_json_response( def make_json_response(
success=1, errormsg='', info='', result=None, data=None, status=200 success=1, errormsg='', info='', result=None, data=None, status=200
@ -45,7 +57,8 @@ def make_json_response(
return Response( return Response(
response=json.dumps(doc, cls=DataTypeJSONEncoder), response=json.dumps(doc, cls=DataTypeJSONEncoder),
status=status, status=status,
mimetype="application/json" mimetype="application/json",
headers=get_no_cache_header()
) )
@ -54,7 +67,8 @@ def make_response(response=None, status=200):
return Response( return Response(
response=json.dumps(response, cls=DataTypeJSONEncoder), response=json.dumps(response, cls=DataTypeJSONEncoder),
status=status, status=status,
mimetype="application/json" mimetype="application/json",
headers=get_no_cache_header()
) )