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Unicode C Examples

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(Unicode 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>

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#include <C_CkXmlW.h>
#include <C_CkRestW.h>
#include <C_CkAuthAwsW.h>

void ChilkatSample(void)
    {
    HCkXmlW xmlInit;
    BOOL success;
    const wchar_t *uploadId;
    HCkRestW rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    HCkAuthAwsW authAws;
    const wchar_t *responseXml;
    HCkXmlW xml;
    HCkXmlW part;
    BOOL hasMoreParts;

    //  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 = CkXmlW_Create();
    success = CkXmlW_LoadXmlFile(xmlInit,L"s3_multipart_uploads/initiate.xml");
    if (success != TRUE) {
        wprintf(L"Did not find the initiate.xml XML file.\n");
        CkXmlW_Dispose(xmlInit);
        return;
    }

    uploadId = CkXmlW_getChildContent(xmlInit,L"UploadId");
    wprintf(L"UploadId = %s\n",uploadId);

    rest = CkRestW_Create();

    //  Connect to the Amazon AWS REST server.
    bTls = TRUE;
    port = 443;
    bAutoReconnect = TRUE;
    success = CkRestW_Connect(rest,L"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 = CkAuthAwsW_Create();
    CkAuthAwsW_putAccessKey(authAws,L"AWS_ACCESS_KEY");
    CkAuthAwsW_putSecretKey(authAws,L"AWS_SECRET_KEY");
    CkAuthAwsW_putServiceName(authAws,L"s3");

    success = CkRestW_SetAuthAws(rest,authAws);

    //  Set the bucket name via the HOST header.
    //  In this case, the bucket name is "chilkat100".
    CkRestW_putHost(rest,L"chilkat100.s3.amazonaws.com");

    //  Add the query parameters.
    CkRestW_AddQueryParam(rest,L"uploadId",uploadId);
    CkRestW_AddQueryParam(rest,L"max-parts",L"100");
    CkRestW_AddQueryParam(rest,L"part-number-marker",L"0");

    //  Our ObjectName in this case is "somethingBig.zip".
    responseXml = CkRestW_fullRequestNoBody(rest,L"GET",L"/somethingBig.zip");
    if (CkRestW_getLastMethodSuccess(rest) != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkXmlW_Dispose(xmlInit);
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        return;
    }

    //  When successful, the S3 Storage service will respond with a 200 response code,
    //  with an XML body.
    if (CkRestW_getResponseStatusCode(rest) != 200) {
        //  Examine the request/response to see what happened.
        wprintf(L"response status code = %d\n",CkRestW_getResponseStatusCode(rest));
        wprintf(L"response status text = %s\n",CkRestW_responseStatusText(rest));
        wprintf(L"response header: %s\n",CkRestW_responseHeader(rest));
        wprintf(L"response body: %s\n",responseXml);
        wprintf(L"---\n");
        wprintf(L"LastRequestStartLine: %s\n",CkRestW_lastRequestStartLine(rest));
        wprintf(L"LastRequestHeader: %s\n",CkRestW_lastRequestHeader(rest));
    }

    xml = CkXmlW_Create();
    CkXmlW_LoadXml(xml,responseXml);

    wprintf(L"%s\n",CkXmlW_getXml(xml));
    wprintf(L"----\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.
    part = CkXmlW_FindChild(xml,L"Part");
    if (CkXmlW_getLastMethodSuccess(xml) == FALSE) {
        wprintf(L"No parts exist.\n");
        CkXmlW_Dispose(xmlInit);
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        CkXmlW_Dispose(xml);
        return;
    }

    hasMoreParts = TRUE;
    while (hasMoreParts == TRUE) {
        wprintf(L"PartNumber: %s\n",CkXmlW_getChildContent(part,L"PartNumber"));
        wprintf(L"LastModified: %s\n",CkXmlW_getChildContent(part,L"LastModified"));
        wprintf(L"ETag: %s\n",CkXmlW_getChildContent(part,L"ETag"));
        wprintf(L"Size: %s\n",CkXmlW_getChildContent(part,L"Size"));
        wprintf(L"----\n");

        //  Advance to the next sibling until we run out.
        hasMoreParts = CkXmlW_NextSibling2(part);
    }

    CkXmlW_Dispose(part);


    CkXmlW_Dispose(xmlInit);
    CkRestW_Dispose(rest);
    CkAuthAwsW_Dispose(authAws);
    CkXmlW_Dispose(xml);

    }

 

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