Problem with returned json

Developers
1

I’m starting a project using JAVA. When I use… https://swd.weatherflow.com/swd/rest/observations/device/{device_id}
the returned json has double starting and ending array brackets in the ‘obs’ object… []. When I try to parse this json I always get an error message. Is there an issue here? I’ve come up with a clumsy hack using string functions to overcome this and replace the double brackets with single brackets but I wonder if there is a problem with the request response on Tempest’s end.

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2

It would likely be helpful to include the request and the verbatim response you are getting in order to troubleshoot this.

3

Double brackets is just an array of arrays so you would parse it as such.

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4

Thanks for responding..,
This is my HttpRequest…

HttpRequest request = HttpRequest.newBuilder()
        .uri(URI.create("[https://swd.weatherflow.com/swd/rest/stats/station/](https://swd.weatherflow.com/swd/rest/stats/station/)" + my_station_id + "?api_key=" + my_access_key))
        .header("accept", "application/json")
        .method("GET", HttpRequest.BodyPublishers.noBody())
        .build();
HttpResponse<String> response = null;
try {
    response = HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.ofString());
} catch (IOException e) {
    e.printStackTrace();
} catch (InterruptedException e) {
    e.printStackTrace();
}

-------------------------------------------------------------------

This is the response...

{"status":{"status_code":0,"status_message":"SUCCESS"},"device_id":378803,"type":"obs_st","summary":{"pressure_trend":"steady","strike_count_1h":0,"strike_count_3h":0,"precip_total_1h":0.0,"strike_last_dist":42,"strike_last_epoch":1735705542,"precip_accum_local_yesterday":12.033536,"precip_accum_local_yesterday_final":6.787493,"precip_analysis_type_yesterday":1,"feels_like":9.4,"heat_index":9.4,"wind_chill":9.4},"obs":[[1742911151,0.4,1.2,1.9,324,6,1008.5,9.4,49,34161,1.51,285,0.0,0,0,0,2.61,1,0.0,0.0,0.0,0]]}


Note the double array brackets... I wasn't able to parse this json until I altered this string to

replace the double brackets with single brackets. I'm not a professional developer... maybe I just don't understand json well enough.

Thanks,

Rudy
5

You may want to check the JSON parser you are using - that response is indeed valid. You can paste it into something like https://jsonlint.com or https://jsonchecker.com/ to confirm as well.

If you’d like, perhaps post the code setting up the parser you’re using along with how you’re setting any configuration options? The problem may be there-

6

The problem that you are encountering is that the original API was written to return an array of arrays for obs values to allow for observation catch-ups in one request if there was a backlog. I added spaces below to make an example more readable:

[ [obs_array0] [obs_array1] [obs_array2] ]

Proper programming would iterate the returned obs array and process each sub-array, but I honestly don’t recall ever seeing more than one sub-array returned at least in the UDP API that uses the same format.

I don’t know JAVA, but something like obs[0] would be the Python way of getting the first sub-array without having to go to a string and delete the outside array [ ] characters…

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