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Asked: 2026-06-14T07:38:12+00:00

I am serving some JSON content from a Google App Engine server. I need

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I am serving some JSON content from a Google App Engine server. I need to serve an ETAG for the content to know if its changed since i last loaded the data. Then my app will remove its old data and use the new JSON data to populate its views.

    self.response.headers['Content-Type'] = "application/json; charset=utf-8"
    self.response.out.write(json.dumps(to_dict(objects,"content")))

Whats the best practice to set ETAGs for the response? Do i have to calculate the ETAG myself? Or is it a way to get the HTTP protocol to do this?

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1 Answer

  1. Editorial Team

    If you’re using webapp2, it can add an md5 ETag based on the response body automatically.

    self.response.md5_etag()

    http://webapp-improved.appspot.com/guide/response.html

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