PowerBuilder

HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Http
string ls_JsonBody
oleobject loo_Task
oleobject loo_Resp
integer li_StatusCode
oleobject loo_Json

li_Success = 0

// 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.

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// 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..
loo_Http.AcceptCharset = ""
loo_Http.UserAgent = ""
loo_Http.AcceptLanguage = ""
loo_Http.AllowGzip = 0

ls_JsonBody = "{~"client_id~": ~"PLAID_CLIENT_ID~", ~"secret~":~"PLAID_SECRET~", ~"count~": 10, ~"offset~": 0}"
loo_Task = loo_Http.PostJson2Async("https://sandbox.plaid.com/institutions/get","application/json",ls_JsonBody)
if loo_Http.LastMethodSuccess = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    return
end if

// Start the background task.
li_Success = loo_Task.Run()
if not li_Success then
    Write-Debug loo_Task.LastErrorText
    destroy loo_Task
    destroy loo_Http
    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.  
do while loo_Task.Finished <> 1
    // Sleep 100 ms.
    loo_Task.SleepMs(100)
loop

// 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 loo_Task.StatusInt <> 7 then
    Write-Debug "Task did not complete."
    Write-Debug "task status: " + loo_Task.Status
    destroy loo_Task
    destroy loo_Http
    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 loo_Task.TaskSuccess = 0 then
    Write-Debug "The underlying task failed, and there is no HTTP response object."
    Write-Debug "The LastErrorText for the underlying method call is:"
    Write-Debug loo_Task.ResultErrorText
    destroy loo_Task
    destroy loo_Http
    return
end if

// To get the HTTP response object, create a new instance and load it with the result from the task.
loo_Resp = create oleobject
li_rc = loo_Resp.ConnectToNewObject("Chilkat.HttpResponse")

loo_Resp.LoadTaskResult(loo_Task)
destroy loo_Task

li_StatusCode = loo_Resp.StatusCode
Write-Debug "Response status code = " + string(li_StatusCode)

// Examine the JSON response..
loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.Load(loo_Resp.BodyStr)
loo_Json.EmitCompact = 0
Write-Debug "JSON Response Body:"
Write-Debug loo_Json.Emit()


destroy loo_Http
destroy loo_Resp
destroy loo_Json