How to parse a JSON http response ?

RE: How to parse a JSON http response ?

Said BARKAM — Thu, 24 Jun 2021 10:00:06 GMT

You can also convert the response to Appian value on the integration object

RE: How to parse a JSON http response ?

legotx — Mon, 01 Jun 2020 21:56:48 GMT

a!fromJSON will return an "Object" with no specific type. From there, you can access the values via dot notation or via index.

Assuming local!weatherData is your variable that holds the response.

with (
   /* ASSUMING RESPONSE BODY IS JSON STRING */
   local!weatherData: a!fromJson(ri!httpResponseBody),
   local!temperature: index(local!weatherData, "main", "temp", null),
   local!pressure: index(local!weatherData, "main", "pressure", null),
   /* RETURNS BOTH TEMPERATURE AND PRESSURE */
   {
     temperature: local!temperature,
     pressure: local!pressure
  }
)

I hope this helps.

RE: How to parse a JSON http response ?

Mike Schmitt — Tue, 26 May 2020 15:35:28 GMT

You should be able to access any of the properties in the dictionary using dot notation in the same syntax.

RE: How to parse a JSON http response ?

gonzaloa — Tue, 26 May 2020 15:20:57 GMT

Thank you very much for your answer Mike. And if I want to show various values? not only the "temp"?

RE: How to parse a JSON http response ?

Mike Schmitt — Tue, 26 May 2020 14:11:58 GMT

Calling a!fromJson on that string does return a valid dictionary of data. You should be able to refer to individual elements of the dictionary via standard dot notation in this case. In this case if you stored the result of the fromJson call in local!jsonDictionary, then you could get "temp" just by calling local!jsonDictionary.main.temp

RE: How to parse a JSON http response ?

gonzaloa — Tue, 26 May 2020 13:37:26 GMT

Hello,

Here is the json string as text:

{"coord":{"lon":-3.7,"lat":40.42},"weather":[{"id":801,"main":"Clouds","description":"few clouds","icon":"02d"}],"base":"stations","main":{"temp":297.85,"feels_like":296.53,"temp_min":296.15,"temp_max":299.15,"pressure":1026,"humidity":44},"visibility":10000,"wind":{"speed":2.6,"deg":120},"clouds":{"all":20},"dt":1590499496,"sys":{"type":1,"id":6443,"country":"ES","sunrise":1590468593,"sunset":1590521653},"timezone":7200,"id":3117735,"name":"Madrid","cod":200}

If I want to post in a read-only interface the "temp" and "pressure" value only for example, what expression/function should I use?

RE: How to parse a JSON http response ?

Mike Schmitt — Tue, 26 May 2020 12:56:42 GMT

What specifically happens when you call a!fromJson on the above json string? Any chance you can post it here as text instead of as a picture?