Chilkat Examples

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PureBasic Examples

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(PureBasic) 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 PureBasic Module Download

Chilkat PureBasic Module

IncludeFile "CkXml.pb"
IncludeFile "CkRest.pb"
IncludeFile "CkAuthAws.pb"

Procedure ChilkatExample()

    ;  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..

    xmlInit.i = CkXml::ckCreate()
    If xmlInit.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkXml::ckLoadXmlFile(xmlInit,"s3_multipart_uploads/initiate.xml")
    If success <> 1
        Debug "Did not find the initiate.xml XML file."
        CkXml::ckDispose(xmlInit)
        ProcedureReturn
    EndIf

    uploadId.s = CkXml::ckGetChildContent(xmlInit,"UploadId")
    Debug "UploadId = " + uploadId

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ;  Connect to the Amazon AWS REST server.
    bTls.i = 1
    port.i = 443
    bAutoReconnect.i = 1
    success = CkRest::ckConnect(rest,"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.
    authAws.i = CkAuthAws::ckCreate()
    If authAws.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkAuthAws::setCkAccessKey(authAws, "AWS_ACCESS_KEY")
    CkAuthAws::setCkSecretKey(authAws, "AWS_SECRET_KEY")
    CkAuthAws::setCkServiceName(authAws, "s3")

    success = CkRest::ckSetAuthAws(rest,authAws)

    ;  Set the bucket name via the HOST header.
    ;  In this case, the bucket name is "chilkat100".
    CkRest::setCkHost(rest, "chilkat100.s3.amazonaws.com")

    ;  Add the query parameters.
    CkRest::ckAddQueryParam(rest,"uploadId",uploadId)
    CkRest::ckAddQueryParam(rest,"max-parts","100")
    CkRest::ckAddQueryParam(rest,"part-number-marker","0")

    ;  Our ObjectName in this case is "somethingBig.zip".
    responseXml.s = CkRest::ckFullRequestNoBody(rest,"GET","/somethingBig.zip")
    If CkRest::ckLastMethodSuccess(rest) <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkXml::ckDispose(xmlInit)
        CkRest::ckDispose(rest)
        CkAuthAws::ckDispose(authAws)
        ProcedureReturn
    EndIf

    ;  When successful, the S3 Storage service will respond with a 200 response code,
    ;  with an XML body.
    If CkRest::ckResponseStatusCode(rest) <> 200
        ;  Examine the request/response to see what happened.
        Debug "response status code = " + Str(CkRest::ckResponseStatusCode(rest))
        Debug "response status text = " + CkRest::ckResponseStatusText(rest)
        Debug "response header: " + CkRest::ckResponseHeader(rest)
        Debug "response body: " + responseXml
        Debug "---"
        Debug "LastRequestStartLine: " + CkRest::ckLastRequestStartLine(rest)
        Debug "LastRequestHeader: " + CkRest::ckLastRequestHeader(rest)
    EndIf

    xml.i = CkXml::ckCreate()
    If xml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::ckLoadXml(xml,responseXml)

    Debug CkXml::ckGetXml(xml)
    Debug "----"

    ;  To iterate over the parts in the response, navigate to the 1st "Part" node
    ;  and then iterate over siblings until there are no more.
    part.i = CkXml::ckFindChild(xml,"Part")
    If CkXml::ckLastMethodSuccess(xml) = 0
        Debug "No parts exist."
        CkXml::ckDispose(xmlInit)
        CkRest::ckDispose(rest)
        CkAuthAws::ckDispose(authAws)
        CkXml::ckDispose(xml)
        ProcedureReturn
    EndIf

    hasMoreParts.i = 1
    While hasMoreParts = 1
        Debug "PartNumber: " + CkXml::ckGetChildContent(part,"PartNumber")
        Debug "LastModified: " + CkXml::ckGetChildContent(part,"LastModified")
        Debug "ETag: " + CkXml::ckGetChildContent(part,"ETag")
        Debug "Size: " + CkXml::ckGetChildContent(part,"Size")
        Debug "----"

        ;  Advance to the next sibling until we run out.
        hasMoreParts = CkXml::ckNextSibling2(part)
    Wend

    CkXml::ckDispose(part)



    CkXml::ckDispose(xmlInit)
    CkRest::ckDispose(rest)
    CkAuthAws::ckDispose(authAws)
    CkXml::ckDispose(xml)


    ProcedureReturn
EndProcedure

 

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