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(Visual Basic 6.0) Send JSON REST Request, Get JSON Response

Demonstrates sending a RESTful JSON request, and receiving a JSON response. This example will create a bucket in Google Cloud Storage (which involves sending and receiving JSON).

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

'  This example will create a bucket in Google Cloud Storage.
Dim success As Long

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

Dim gAuth As New ChilkatAuthGoogle
'  Obtain an access token as shown in one of the following examples:
'  See Get Access Token using a Service Account JSON Key
'  See Get Access Token using a P12 File

Dim rest As New ChilkatRest

'  Connect using TLS.
Dim bAutoReconnect As Long
bAutoReconnect = 1
success = rest.Connect("www.googleapis.com",443,1,bAutoReconnect)

'  Provide the authentication credentials (i.e. the access key)
success = rest.SetAuthGoogle(gAuth)

'  Build the JSON request body for creating a bucket.
'  The only required property is the "name", but we'll add more
'  to make a better example..
Dim jsonReqBody As New ChilkatJsonObject
success = jsonReqBody.AddStringAt(-1,"name","chilkat-bucket-c")
success = jsonReqBody.AddStringAt(-1,"kind","storage#bucket")
success = jsonReqBody.AddStringAt(-1,"location","US")
success = jsonReqBody.AddObjectAt(-1,"versioning")

Dim pObjVersioning As ChilkatJsonObject
Set pObjVersioning = jsonReqBody.ObjectOf("versioning")
success = pObjVersioning.AddBoolAt(-1,"enabled",1)

'  Show the HTTP request body we'll be sending.
Text1.Text = Text1.Text & jsonReqBody.Emit() & vbCrLf

'  Add the required query parameter.
'  See https://cloud.google.com/storage/docs/json_api/v1/buckets/insert
success = rest.AddQueryParam("project","chilkattest-1050")

'  Add the Content-Type HTTP request header.
success = rest.AddHeader("Content-Type","application/json; charset=UTF-8")

Dim jsonResponseStr As String
jsonResponseStr = rest.FullRequestString("POST","/storage/v1/b",jsonReqBody.Emit())
If (rest.LastMethodSuccess <> 1) Then
    Text1.Text = Text1.Text & rest.LastErrorText & vbCrLf
    Exit Sub
End If

'  Show the JSON response.  (See below for a sample JSON response.)
Text1.Text = Text1.Text & "Json Response: " & jsonResponseStr & vbCrLf


/*

{
 "kind": "storage#bucket",
 "id": "chilkat-bucket-c",
 "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket-c",
 "projectNumber": "999992999999",
 "name": "chilkat-bucket-c",
 "timeCreated": "2016-04-29T21:08:10.451Z",
 "updated": "2016-04-29T21:08:10.451Z",
 "metageneration": "1",
 "owner": {
  "entity": "project-owners-999992999999"
 },
 "location": "US",
 "versioning": {
  "enabled": true
 },
 "storageClass": "STANDARD",
 "etag": "CAE="
}

*/

 

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