(VB.NET) Refinitiv World-Check One - Get Top Level Groups

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Sends a signed GET request to get the top level groups.

Note: This example requires Chilkat v9.5.0.89 or later.

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' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim json As New Chilkat.JsonObject
Dim success As Boolean

' Create the following JSON:
' 
' {
'   "keyId": "aaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee",
'   "hmacKey": "xxxxzI3vi58xxxCBxxx1+P/d8tGxx7KuLqN/KMPNxxxxekhj8/bx83+1YQSUxxxxYyv939ceY06GvhYRKmxxxx==",
'   "algorithm": "hmac-sha256",
'   "headers": [
'     "(request-target)",
'     "host",
'     "date"
'   ]
' }

' Substitute your actual API key and API secret in place of "api-key" and "api-secret"
json.UpdateString("keyId","api-key")
json.UpdateString("hmacKey","api-secret")
json.UpdateString("algorithm","hmac-sha256")
' Indicate the names of the headers to be included in the signature.
' "(request-target)" is not actually a header name, but is a special name for HTTP signatures.
' Copy the following three lines of code exactly as-is.  
' Do not replace "host", "date", or "(request-target)" with values.
json.UpdateString("headers[0]","(request-target)")
json.UpdateString("headers[1]","host")
json.UpdateString("headers[2]","date")

Dim http As New Chilkat.Http

' Setting the AuthSignature property causes the following header to be computed and added:
' Authorization: Signature keyId="...", algorithm="hmac-sha256", headers="(request-target) host date", signature="..."
http.AuthSignature = json.Emit()

http.SetRequestHeader("Cache-Control","no-cache")

' Chilkat will auto-add the Date header because it's needed by the HTTP Signature.

Dim responseJson As String = http.QuickGetStr("https://api-worldcheck.refinitiv.com/v2/groups")
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Debug.WriteLine(responseJson)
Debug.WriteLine("----")
' A 200 status code indicates success.
Debug.WriteLine("Status code = " & http.LastStatus)

' Successful JSON looks like this:
' [ 
'   {
'   "id": "...",
'   "name": "Company Name",
'   "parentId": null,
'   "hasChildren": false,
'   "status": "ACTIVE",
'   "children": []
'   }
' ]

' Use this online tool to generate parsing code from sample JSON: 
' Generate Parsing Code from JSON

Dim jarr As New Chilkat.JsonArray

success = jarr.Load(responseJson)

Dim jsonObj As Chilkat.JsonObject
Dim id As String
Dim name As String
Dim parentId As String
Dim hasChildren As Boolean
Dim status As String
Dim j As Integer
Dim count_j As Integer

Dim i As Integer = 0
Dim count_i As Integer = jarr.Size
While i < count_i
    jsonObj = jarr.ObjectAt(i)
    id = jsonObj.StringOf("id")
    name = jsonObj.StringOf("name")
    parentId = jsonObj.StringOf("parentId")
    hasChildren = jsonObj.BoolOf("hasChildren")
    status = jsonObj.StringOf("status")
    j = 0
    count_j = jsonObj.SizeOfArray("children")
    While j < count_j
        jsonObj.J = j
        j = j + 1
    End While

    i = i + 1
End While