Chilkat Online Tools

ListChangedBlocks Xojo Example

Amazon Elastic Block Store

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

Dim rest As New Chilkat.Rest
Dim success As Boolean

Dim authAws As New Chilkat.AuthAws
authAws.AccessKey = "AWS_ACCESS_KEY"
authAws.SecretKey = "AWS_SECRET_KEY"

// Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.Region = "us-west-2"
authAws.ServiceName = "ebs"
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
success = rest.SetAuthAws(authAws)

// URL: https://ebs.us-west-2.amazonaws.com/
// Use the same region as specified above.
success = rest.Connect("ebs.us-west-2.amazonaws.com",443,True,True)
If (success <> True) Then
    System.DebugLog("ConnectFailReason: " + Str(rest.ConnectFailReason))
    System.DebugLog(rest.LastErrorText)
    Return
End If

success = rest.AddHeader("Content-Type","application/x-amz-json-1.1")
success = rest.AddHeader("X-Amz-Target","ListChangedBlocks")

Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestNoBodySb("GET","/snapshots/{secondSnapshotId}/changedblocks",sbResponseBody)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

Dim respStatusCode As Int32
respStatusCode = rest.ResponseStatusCode
System.DebugLog("response status code = " + Str(respStatusCode))
If (respStatusCode <> 200) Then
    System.DebugLog("Response Header:")
    System.DebugLog(rest.ResponseHeader)
    System.DebugLog("Response Body:")
    System.DebugLog(sbResponseBody.GetAsString())
    Return
End If

Dim jResp As New Chilkat.JsonObject
success = jResp.LoadSb(sbResponseBody)

// The following code parses the JSON response.
// A sample JSON response is shown below the sample code.

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

Dim BlockIndex As Int32
Dim FirstBlockToken As String
Dim SecondBlockToken As String

Dim BlockSize As Int32
BlockSize = jResp.IntOf("BlockSize")
Dim ExpiryTime As Int32
ExpiryTime = jResp.IntOf("ExpiryTime")
Dim NextToken As String
NextToken = jResp.StringOf("NextToken")
Dim VolumeSize As Int32
VolumeSize = jResp.IntOf("VolumeSize")
Dim i As Int32
i = 0
Dim count_i As Int32
count_i = jResp.SizeOfArray("ChangedBlocks")
While i < count_i
    jResp.I = i
    BlockIndex = jResp.IntOf("ChangedBlocks[i].BlockIndex")
    FirstBlockToken = jResp.StringOf("ChangedBlocks[i].FirstBlockToken")
    SecondBlockToken = jResp.StringOf("ChangedBlocks[i].SecondBlockToken")
    i = i + 1
Wend

// A sample JSON response body parsed by the above code:

// {
//   "BlockSize": number,
//   "ChangedBlocks": [
//     {
//       "BlockIndex": number,
//       "FirstBlockToken": "string",
//       "SecondBlockToken": "string"
//     }
//   ],
//   "ExpiryTime": number,
//   "NextToken": "string",
//   "VolumeSize": number
// }