VB.NET

Inspect the Complete Set of Defined Variables

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This example shows how to inspect the complete set of defined variables after executing the curl dependency plan. The code that enumerates and displays all variables is located at the end of the example. VB.NET

Dim success As Boolean = False

' This example shows how to inspect the complete set of defined variables
' after executing the curl dependency plan.
' The code that enumerates and displays all variables is located at the end of the example.

Dim httpCurl As New Chilkat.HttpCurl

' The final curl command we want to execute.
' It depends on {{drive_id}}, which is not yet known.
Dim targetCurl As String = "curl -X GET https://graph.microsoft.com/v1.0/drives/{{drive_id}}/root/children"

' Define a helper function that can produce drive_id.
' This function lists drives for a given site, which requires {{site_id}}.
Dim fnName As String = "getDrives"
httpCurl.AddFunction(fnName,"curl -X GET https://graph.microsoft.com/v1.0/sites/{{site_id}}/drives")

' Define the output of getDrives.
' The JSON response contains an array named "value".
' We take the first element (value[0]) and extract its "id" as drive_id.
Dim jsonPath As String = "value[0].id"
httpCurl.AddOutput(fnName,jsonPath,"drive_id")

' drive_id depends on site_id, which is also not yet known.
' Define another helper function to obtain site_id.
fnName = "getSite"
httpCurl.AddFunction(fnName,"GET https://graph.microsoft.com/v1.0/sites/root:/sites/{{site_name}}")

' Map the "id" field from the getSite response to the variable site_id.
jsonPath = "id"
httpCurl.AddOutput(fnName,jsonPath,"site_id")

' Provide the initial known input.
' site_name is the starting value that allows the dependency chain to be resolved.
httpCurl.SetVar("site_name","test")

' ----------------------------------------------------------------------------------------------------------------------
' Configure OAuth2 authentication using the client credentials flow.
' Secrets (client_id, client_secret, token_endpoint) are retrieved from the
' local secrets manager because EnableSecrets is enabled.
Dim jsonOAuth2 As New Chilkat.JsonObject
jsonOAuth2.EnableSecrets = True
jsonOAuth2.UpdateString("oauth2.client_id","!!sharepoint|oauth2|client_id")
jsonOAuth2.UpdateString("oauth2.client_secret","!!sharepoint|oauth2|client_secret")
jsonOAuth2.UpdateString("oauth2.scope","https://graph.microsoft.com/.default")
jsonOAuth2.UpdateString("oauth2.token_endpoint","!!sharepoint|oauth2|token_endpoint")
httpCurl.SetAuth(jsonOAuth2)
' ----------------------------------------------------------------------------------------------------------------------

' Execute the target curl command.
' Internally, the system will:
' 
' 1) Detect that {{drive_id}} is required but not defined.
' 2) Find that "getDrives" can produce drive_id.
' 3) Detect that getDrives requires {{site_id}}, which is also not defined.
' 4) Find that "getSite" can produce site_id.
' 5) Verify that getSite requires {{site_name}}, which is already known.
' 6) Build a multi-step execution plan:
'      - First:  run getSite (produces site_id)
'      - Second: run getDrives (produces drive_id)
'      - Third:  run the target curl (uses drive_id)
success = httpCurl.DoYourThing(targetCurl)
If (success = False) Then
    Debug.WriteLine(httpCurl.LastErrorText)
    Exit Sub
End If


' Retrieve and display the HTTP response status code.
Dim statusCode As Integer = httpCurl.StatusCode
Debug.WriteLine("response status code: " & statusCode)

' Load and display the JSON response from the final curl command.
Dim responseJson As New Chilkat.JsonObject
responseJson.EmitCompact = False
httpCurl.GetResponseJson(responseJson)
Debug.WriteLine(responseJson.Emit())

' ----------------------------------
' Examine all defined variables.
' ----------------------------------
Dim definedVarsJson As New Chilkat.JsonObject
definedVarsJson.EmitCompact = False

httpCurl.GetAllVars(definedVarsJson)
Debug.WriteLine(definedVarsJson.Emit())

' Sample output:

' {
'   "vars": [
'     {
'       "name": "site_name",
'       "value": "test"
'     },
'     {
'       "name": "site_id",
'       "value": "example.sharepoint.com,9b923c5e-5117-44ad-8b03-adbb8e19be85,b2451e19-290f-5f29-9f5d-674c2950a9f7"
'     },
'     {
'       "name": "drive_id",
'       "value": "b!XjySmxdRrrtLA827jhm-nRkeRbIPKSlPn11nTClQqfeVOj5VUvQMQae34rwOHdiP"
'     }
'   ]
' }

' Sample code to parse the above JSON.
Dim i As Integer = 0
Dim numVars As Integer = definedVarsJson.SizeOfArray("vars")
While i < numVars
    definedVarsJson.I = i
    Debug.WriteLine("name: " & definedVarsJson.StringOf("vars[i].name"))
    Debug.WriteLine("value: " & definedVarsJson.StringOf("vars[i].value"))
    i = i + 1
End While