(C++) 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 C/C++ Library Downloads
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#include <CkXml.h>
#include <CkRest.h>
#include <CkAuthAws.h>

void ChilkatSample(void)
    {
    // 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..

    CkXml xmlInit;
    bool success = xmlInit.LoadXmlFile("s3_multipart_uploads/initiate.xml");
    if (success != true) {
        std::cout << "Did not find the initiate.xml XML file." << "\r\n";
        return;
    }

    const char *uploadId = xmlInit.getChildContent("UploadId");
    std::cout << "UploadId = " << uploadId << "\r\n";

    CkRest rest;

    // Connect to the Amazon AWS REST server.
    bool bTls = true;
    int port = 443;
    bool bAutoReconnect = true;
    success = rest.Connect("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.
    CkAuthAws authAws;
    authAws.put_AccessKey("AWS_ACCESS_KEY");
    authAws.put_SecretKey("AWS_SECRET_KEY");
    authAws.put_ServiceName("s3");

    success = rest.SetAuthAws(authAws);

    // Set the bucket name via the HOST header.
    // In this case, the bucket name is "chilkat100".
    rest.put_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".
    const char *responseXml = rest.fullRequestNoBody("GET","/somethingBig.zip");
    if (rest.get_LastMethodSuccess() != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    // When successful, the S3 Storage service will respond with a 200 response code,
    // with an XML body.  
    if (rest.get_ResponseStatusCode() != 200) {
        // Examine the request/response to see what happened.
        std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
        std::cout << "response header: " << rest.responseHeader() << "\r\n";
        std::cout << "response body: " << responseXml << "\r\n";
        std::cout << "---" << "\r\n";
        std::cout << "LastRequestStartLine: " << rest.lastRequestStartLine() << "\r\n";
        std::cout << "LastRequestHeader: " << rest.lastRequestHeader() << "\r\n";
    }

    CkXml xml;
    xml.LoadXml(responseXml);

    std::cout << xml.getXml() << "\r\n";
    std::cout << "----" << "\r\n";

    // To iterate over the parts in the response, navigate to the 1st "Part" node
    // and then iterate over siblings until there are no more.
    CkXml *part = xml.FindChild("Part");
    if (xml.get_LastMethodSuccess() == false) {
        std::cout << "No parts exist." << "\r\n";
        return;
    }

    bool hasMoreParts = true;
    while (hasMoreParts == true) {
        std::cout << "PartNumber: " << part->getChildContent("PartNumber") << "\r\n";
        std::cout << "LastModified: " << part->getChildContent("LastModified") << "\r\n";
        std::cout << "ETag: " << part->getChildContent("ETag") << "\r\n";
        std::cout << "Size: " << part->getChildContent("Size") << "\r\n";
        std::cout << "----" << "\r\n";

        // Advance to the next sibling until we run out.
        hasMoreParts = part->NextSibling2();
    }

    delete part;
    }