Is there a way to send REST API calls in AVEVA System Platform & OMI? I have seen some documentation on Rest API for Recipe Management and don't know if/how that would help me in this situation. After a button is clicked, I want to send a rest message with HTTP Post.
Hi Caroline,
As Adam suggest, the WEBSVC will allow you to do connections to webservice and get or set data and presenting it in a OI Driver like way.
Funneling the data into datapoints you could use in your objects.
But there is also possible to do this using scripting, the following example will utilize a RestSharp.dll and the newtonsoft library for working with json
'REST API Call
dim client as RestSharp.RestClient;
dim request as RestSharp.RestRequest;
dim response as RestSharp.RestResponse;
client = new RestSharp.RestClient("http://api.openweathermap.org/data/2.5/forecast?q=London&mode=json&units=imperial&cnt=7&appid=3b8af615471033987fdaa4bf2ef93231");
client.Timeout = -1;
'System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Ssl3 |System.Net.SecurityProtocolType.Tls | System.Net.SecurityProtocolType.Tls11 | System.Net.SecurityProtocolType.Tls12 | System.Net.SecurityProtocolType.Tls13;
request = new RestSharp.RestRequest(RestSharp.Method.GET);
response = client.Execute(request);
LogError(response.Content);
Me.Result = response.Content;
'JSON String parsing
dim jinstance as Newtonsoft.Json.Linq.JObject;
dim jarray1 as Newtonsoft.Json.Linq.JArray;
jinstance = Newtonsoft.Json.Linq.JObject.Parse(response.Content);
jarray1 = Newtonsoft.Json.Linq.JArray.FromObject(jinstance["list"]);
'Assign values to Attibutes
dim i as integer;
for i = 0 to jarray1.Count - 1 step 1
Me.Humidity.Value[i + 1] = jarray1[i]["main"]["humidity"];
LogMessage(Me.Humidity.Value);
Me.Temperature.Max[i + 1] = jarray1[i]["main"]["temp_min"];
Me.Temperature.Min[i + 1] = jarray1[i]["main"]["temp_max"];
next;
Me.Run = false;
I have some additional examples and files, but reach out to me (contact info in my profile) and I can send you some example files if you find it valuable.
Hi Caroline,
As Adam suggest, the WEBSVC will allow you to do connections to webservice and get or set data and presenting it in a OI Driver like way.
Funneling the data into datapoints you could use in your objects.
But there is also possible to do this using scripting, the following example will utilize a RestSharp.dll and the newtonsoft library for working with json
'REST API Call
dim client as RestSharp.RestClient;
dim request as RestSharp.RestRequest;
dim response as RestSharp.RestResponse;
client = new RestSharp.RestClient("http://api.openweathermap.org/data/2.5/forecast?q=London&mode=json&units=imperial&cnt=7&appid=3b8af615471033987fdaa4bf2ef93231");
client.Timeout = -1;
'System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Ssl3 |System.Net.SecurityProtocolType.Tls | System.Net.SecurityProtocolType.Tls11 | System.Net.SecurityProtocolType.Tls12 | System.Net.SecurityProtocolType.Tls13;
request = new RestSharp.RestRequest(RestSharp.Method.GET);
response = client.Execute(request);
LogError(response.Content);
Me.Result = response.Content;
'JSON String parsing
dim jinstance as Newtonsoft.Json.Linq.JObject;
dim jarray1 as Newtonsoft.Json.Linq.JArray;
jinstance = Newtonsoft.Json.Linq.JObject.Parse(response.Content);
jarray1 = Newtonsoft.Json.Linq.JArray.FromObject(jinstance["list"]);
'Assign values to Attibutes
dim i as integer;
for i = 0 to jarray1.Count - 1 step 1
Me.Humidity.Value[i + 1] = jarray1[i]["main"]["humidity"];
LogMessage(Me.Humidity.Value);
Me.Temperature.Max[i + 1] = jarray1[i]["main"]["temp_min"];
Me.Temperature.Min[i + 1] = jarray1[i]["main"]["temp_max"];
next;
Me.Run = false;
I have some additional examples and files, but reach out to me (contact info in my profile) and I can send you some example files if you find it valuable.
