Chilkat Online Tools

ListChangedBlocks VBScript Example

Amazon Elastic Block Store

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

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

set rest = CreateObject("Chilkat_9_5_0.Rest")

set authAws = CreateObject("Chilkat_9_5_0.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",443,1,1)
If (success <> 1) Then
    outFile.WriteLine("ConnectFailReason: " & rest.ConnectFailReason)
    outFile.WriteLine(rest.LastErrorText)
    WScript.Quit
End If

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

set sbResponseBody = CreateObject("Chilkat_9_5_0.StringBuilder")
success = rest.FullRequestNoBodySb("GET","/snapshots/{secondSnapshotId}/changedblocks",sbResponseBody)
If (success <> 1) Then
    outFile.WriteLine(rest.LastErrorText)
    WScript.Quit
End If

respStatusCode = rest.ResponseStatusCode
outFile.WriteLine("response status code = " & respStatusCode)
If (respStatusCode <> 200) Then
    outFile.WriteLine("Response Header:")
    outFile.WriteLine(rest.ResponseHeader)
    outFile.WriteLine("Response Body:")
    outFile.WriteLine(sbResponseBody.GetAsString())
    WScript.Quit
End If

set jResp = CreateObject("Chilkat_9_5_0.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

BlockSize = jResp.IntOf("BlockSize")
ExpiryTime = jResp.IntOf("ExpiryTime")
NextToken = jResp.StringOf("NextToken")
VolumeSize = jResp.IntOf("VolumeSize")
i = 0
count_i = jResp.SizeOfArray("ChangedBlocks")
Do 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
Loop

' 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
' }

outFile.Close