Xojo Plugin

HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method. Xojo Plugin

Dim success As Boolean
success = False

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code

// See PostJson2 Example for the synchronous equivalent of this example.

Dim http As New Chilkat.Http

// Sends a POST equivalent to the following CURL command:

// curl -X POST https://sandbox.plaid.com/institutions/get \
//   -H 'content-type: application/json' \
//   -d '{
//     "client_id": String,
//     "secret":String,
//     "count": Number,
//     "offset": Number
//   }'

// Suppress some default headers that would automatically added..
http.AcceptCharset = ""
http.UserAgent = ""
http.AcceptLanguage = ""
http.AllowGzip = False

Dim jsonBody As String
jsonBody = "{""client_id"": ""PLAID_CLIENT_ID"", ""secret"":""PLAID_SECRET"", ""count"": 10, ""offset"": 0}"
Dim task As Chilkat.Task
task = http.PostJson2Async("https://sandbox.plaid.com/institutions/get","application/json",jsonBody)
If (http.LastMethodSuccess = False) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

// Start the background task.
success = task.Run()
If (Not success) Then
    System.DebugLog(task.LastErrorText)

    Return
End If

// The application is now free to do anything else
// while the HTTP POST is in progress

// For this example, we'll simply sleep and periodically
// check to see if the HTTP POST is finished.  
While task.Finished <> True
    // Sleep 100 ms.
    task.SleepMs 100
Wend

// When we get here, the task is either finished successfully or not, or was canceled/aborted.

// If the task was "canceled", it was canceled prior to actually starting.  This could
// happen if the task was canceled while waiting in a thread pool queue to be scheduled by Chilkat's
// background thread pool scheduler.  

// If the task was "aborted", it indicates that it was canceled while running in a background thread.  
// The ResultErrorText will likely indicate that the task was aborted.

// If the task "completed", then it ran to completion, but the actual success/failure of the method
// is determined by getting the result of the underlying method call.
// A task status of 7 indicates completion.
If (task.StatusInt <> 7) Then
    System.DebugLog("Task did not complete.")
    System.DebugLog("task status: " + task.Status)

    Return
End If

// When called synchronously, the PostJson2 method returns an HTTP response object,
// unless the method failed and there was no response to be had.
// Check to see if PostJson2 method failed (and thus there is no response object).
If (task.TaskSuccess = False) Then
    System.DebugLog("The underlying task failed, and there is no HTTP response object.")
    System.DebugLog("The LastErrorText for the underlying method call is:")
    System.DebugLog(task.ResultErrorText)

    Return
End If

// To get the HTTP response object, create a new instance and load it with the result from the task.
Dim resp As New Chilkat.HttpResponse
success = resp.LoadTaskResult(task)

Dim statusCode As Int32
statusCode = resp.StatusCode
System.DebugLog("Response status code = " + Str(statusCode))

// Examine the JSON response..
Dim json As New Chilkat.JsonObject
success = json.Load(resp.BodyStr)
json.EmitCompact = False
System.DebugLog("JSON Response Body:")
System.DebugLog(json.Emit())