(Unicode C++) OSS List Bucket Objects (Alibaba Cloud)

See more Alibaba Cloud OSS Examples

Demonstrates how to list the objects in a bucket.

The Chilkat S3 functions in the HTTP class are compatible with Alibaba Cloud's OSS service.

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#include <CkHttpW.h>
#include <CkXmlW.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat HTTP API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkHttpW http;

    // Insert your AccessKey ID here:
    http.put_AwsAccessKey(L"access-key");

    // Insert your AccessKey Secret here:
    http.put_AwsSecretKey(L"secret-key");

    // To list objects in a bucket located in a different region, use the endpoint for that region, such as "oss-cn-hangzhou.aliyuncs.com 	"
    // See Alibaba Object Storage Service Regions and Endpoints
    http.put_AwsEndpoint(L"oss-us-east-1.aliyuncs.com");

    const wchar_t *bucketName = L"chilkat";

    const wchar_t *strXml = http.s3_ListBucketObjects(bucketName);
    if (http.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    wprintf(L"Response status code = %d\n",http.get_LastStatus());

    CkXmlW xml;
    bool success = xml.LoadXml(strXml);
    if (success != true) {
        wprintf(L"%s\n",xml.lastErrorText());
        return;
    }

    // If the response status code was not 200, then the XML response is not a 
    // listing of objects, but instead contains error information.
    if (http.get_LastStatus() != 200) {
        wprintf(L"%s\n",xml.getXml());
        wprintf(L"Failed.\n");
        return;
    }

    // A sample response is shown below.
    wprintf(L"%s\n",xml.getXml());
    wprintf(L"----\n");

    // Use this online tool to generate parsing code from sample XML: 
    // Generate Parsing Code from XML

    // <?xml version="1.0" encoding="UTF-8"?>
    // <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    //     <Name>chilkat</Name>
    //     <Prefix/>
    //     <Marker/>
    //     <MaxKeys>1000</MaxKeys>
    //     <IsTruncated>false</IsTruncated>
    //     <Contents>
    //         <Key>orchard.json</Key>
    //         <LastModified>2021-10-29T16:58:12.000Z</LastModified>
    //         <ETag>"303FB46CF341094FEF6274B7789CD6AA"</ETag>
    //         <Size>22</Size>
    //         <StorageClass>STANDARD</StorageClass>
    //         <Owner>
    //             <ID>5035535379748121</ID>
    //             <DisplayName>5035535379748121</DisplayName>
    //         </Owner>
    //     </Contents>
    //     <Contents>
    //         <Key>seahorse.jpg</Key>
    //         <LastModified>2021-10-29T16:52:01.000Z</LastModified>
    //         <ETag>"A8551F0A5437F43A796FCA7623EE9232"</ETag>
    //         <Size>24388</Size>
    //         <StorageClass>STANDARD</StorageClass>
    //         <Owner>
    //             <ID>5035535379748121</ID>
    //             <DisplayName>5035535379748121</DisplayName>
    //         </Owner>
    // 
    //     </Contents>
    // </ListBucketResult>

    const wchar_t *Key = 0;
    const wchar_t *LastModified = 0;
    const wchar_t *ETag = 0;
    const wchar_t *SizeDecimalStr = 0;
    const wchar_t *StorageClass = 0;
    const wchar_t *ID = 0;
    const wchar_t *DisplayName = 0;

    const wchar_t *ListBucketResult_xmlns = xml.getAttrValue(L"xmlns");
    const wchar_t *Name = xml.getChildContent(L"Name");
    int MaxKeys = xml.GetChildIntValue(L"MaxKeys");
    const wchar_t *IsTruncated = xml.getChildContent(L"IsTruncated");
    int i = 0;
    int count_i = xml.NumChildrenHavingTag(L"Contents");
    while (i < count_i) {
        xml.put_I(i);
        Key = xml.getChildContent(L"Contents[i]|Key");
        LastModified = xml.getChildContent(L"Contents[i]|LastModified");
        ETag = xml.getChildContent(L"Contents[i]|ETag");
        SizeDecimalStr = xml.getChildContent(L"Contents[i]|Size");
        StorageClass = xml.getChildContent(L"Contents[i]|StorageClass");
        ID = xml.getChildContent(L"Contents[i]|Owner|ID");
        DisplayName = xml.getChildContent(L"Contents[i]|Owner|DisplayName");
        i = i + 1;
    }
    }