In Azure API Management, I need to add values to form-data body and pass to back end

Question

Is it possible to add some Keys/Values to a form-data body and then pass that body to the backend URL.

Answer 1

@Robert Heynen Form Data can be extracted in the set-body policy as mentioned in the official docs and you should be able to append values to it like so.

<set-body template="none">@{
var formData = context.Request.Body.AsFormUrlEncodedContent();

formData.Add("secret", new List<string>() {"123", "456"});

return formData.ToFormUrlEncodedContent();
}</set-body>

If your backend requires JSON, you can replace the return line with JsonConvert.SerializeObject(formData) which will output the object as JSON instead.

Answer 2

Your best and easiest option is to use the form data, make a json object, add additional property to the JSON body and put that in the request body for a POST message to the API backend.