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VB.NET UWP/WinRT Examples

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(VB.NET UWP/WinRT) S3 List Parts

This operation lists the parts that have been uploaded for a specific multipart upload.

This operation must include the upload ID, which you obtain by sending the initiate multipart upload request. This request returns a maximum of 1000 uploaded parts. The default number of parts returned is 1000 parts. You can restrict the number of parts returned by specifying the max-parts request parameter. If your multipart upload consists of more than 1000 parts, the response returns an IsTruncated field with the value of true, and a NextPartNumberMarker element. In subsequent List Parts requests you can include the part-number-marker query string parameter and set its value to the NextPartNumberMarker field value from the previous response.

This example sends GET request that looks like this:

GET /example-object?uploadId=XXBsb2FkIElEIGZvciBlbHZpbmcncyVcdS1tb3ZpZS5tMnRzEEEwbG9hZA&max-parts=100&part-number-marker=1 HTTP/1.1
Host: example-bucket.s3.amazonaws.com
Date: Mon, 1 Nov 2010 20:34:56 GMT
Authorization: authorization string

The following is a sample response:

HTTP/1.1 200 OK
x-amz-id-2: Uuag1LuByRx9e6j5Onimru9pO4ZVKnJ2Qz7/C1NPcfTWAtRPfTaOFg==
x-amz-request-id: 656c76696e6727732072657175657374
Date: Mon, 1 Nov 2010 20:34:56 GMT
Content-Length: 985
Connection: keep-alive
Server: AmazonS3

<?xml version="1.0" encoding="UTF-8"?>
<ListPartsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
  <Bucket>example-bucket</Bucket>
  <Key>example-object</Key>
  <UploadId>XXBsb2FkIElEIGZvciBlbHZpbmcncyVcdS1tb3ZpZS5tMnRzEEEwbG9hZA</UploadId>
  <Initiator>
      <ID>arn:aws:iam::111122223333:user/some-user-11116a31-17b5-4fb7-9df5-b288870f11xx</ID>
      <DisplayName>umat-user-11116a31-17b5-4fb7-9df5-b288870f11xx</DisplayName>
  </Initiator>
  <Owner>
    <ID>75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a</ID>
    <DisplayName>someName</DisplayName>
  </Owner>
  <StorageClass>STANDARD</StorageClass>
  <PartNumberMarker>1</PartNumberMarker>
  <NextPartNumberMarker>3</NextPartNumberMarker>
  <MaxParts>2</MaxParts>
  <IsTruncated>true</IsTruncated>
  <Part>
    <PartNumber>2</PartNumber>
    <LastModified>2010-11-10T20:48:34.000Z</LastModified>
    <ETag>"7778aef83f66abc1fa1e8477f296d394"</ETag>
    <Size>10485760</Size>
  </Part>
  <Part>
    <PartNumber>3</PartNumber>
    <LastModified>2010-11-10T20:48:33.000Z</LastModified>
    <ETag>"aaaa18db4cc2f85cedef654fccc4a4x8"</ETag>
    <Size>10485760</Size>
  </Part>
</ListPartsResult>

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

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

' Other S3 Multipart Upload Examples:
' Initiate Multipart Upload
' S3 Upload Parts
' Complete Multipart Upload
' Abort Multipart Upload

' When the multipart upload was initiated, an UploadId was provided in the XML response, and 
' we saved it to a file.  We'll get the upload ID from there..

Dim xmlInit As New Chilkat.Xml
Dim success As Boolean = xmlInit.LoadXmlFile("s3_multipart_uploads/initiate.xml")
If (success <> True) Then
    Debug.WriteLine("Did not find the initiate.xml XML file.")
    Exit Sub
End If


Dim uploadId As String = xmlInit.GetChildContent("UploadId")
Debug.WriteLine("UploadId = " & uploadId)

Dim rest As New Chilkat.Rest

' Connect to the Amazon AWS REST server.
Dim bTls As Boolean = True
Dim port As Integer = 443
Dim bAutoReconnect As Boolean = True
success = Await rest.ConnectAsync("s3.amazonaws.com",port,bTls,bAutoReconnect)

' ----------------------------------------------------------------------------
' Important: For buckets created in regions outside us-east-1,
' there are three important changes that need to be made.
' See Working with S3 Buckets in Non-us-east-1 Regions for the details.
' ----------------------------------------------------------------------------

' Provide AWS credentials for the REST call.
Dim authAws As New Chilkat.AuthAws
authAws.AccessKey = "AWS_ACCESS_KEY"
authAws.SecretKey = "AWS_SECRET_KEY"
authAws.ServiceName = "s3"

success = rest.SetAuthAws(authAws)

' Set the bucket name via the HOST header.
' In this case, the bucket name is "chilkat100".
rest.Host = "chilkat100.s3.amazonaws.com"

' Add the query parameters.
rest.AddQueryParam("uploadId",uploadId)
rest.AddQueryParam("max-parts","100")
rest.AddQueryParam("part-number-marker","0")

' Our ObjectName in this case is "somethingBig.zip".
Dim responseXml As String = Await rest.FullRequestNoBodyAsync("GET","/somethingBig.zip")
If (rest.LastMethodSuccess <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' When successful, the S3 Storage service will respond with a 200 response code,
' with an XML body.  
If (rest.ResponseStatusCode <> 200) Then
    ' Examine the request/response to see what happened.
    Debug.WriteLine("response status code = " & rest.ResponseStatusCode)
    Debug.WriteLine("response status text = " & rest.ResponseStatusText)
    Debug.WriteLine("response header: " & rest.ResponseHeader)
    Debug.WriteLine("response body: " & responseXml)
    Debug.WriteLine("---")
    Debug.WriteLine("LastRequestStartLine: " & rest.LastRequestStartLine)
    Debug.WriteLine("LastRequestHeader: " & rest.LastRequestHeader)
End If


Dim xml As New Chilkat.Xml
xml.LoadXml(responseXml)

Debug.WriteLine(xml.GetXml())
Debug.WriteLine("----")

' To iterate over the parts in the response, navigate to the 1st "Part" node
' and then iterate over siblings until there are no more.
Dim part As Chilkat.Xml = xml.FindChild("Part")
If (xml.LastMethodSuccess = False) Then
    Debug.WriteLine("No parts exist.")
    Exit Sub
End If


Dim hasMoreParts As Boolean = True
While hasMoreParts = True
    Debug.WriteLine("PartNumber: " & part.GetChildContent("PartNumber"))
    Debug.WriteLine("LastModified: " & part.GetChildContent("LastModified"))
    Debug.WriteLine("ETag: " & part.GetChildContent("ETag"))
    Debug.WriteLine("Size: " & part.GetChildContent("Size"))
    Debug.WriteLine("----")

    ' Advance to the next sibling until we run out.
    hasMoreParts = part.NextSibling2()
End While



 

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