(MFC) S3 Download Specific Version of File

Demonstrates how to download a file from the Amazon S3 service using the versionId query parameter.

Note: This example requires Chilkat v9.5.0.89 or later. (A problem regarding AwsSubResources w/ downloads was fixed shortly after the v9.5.0.88 release.)

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttp.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkHttp http;

    http.put_AwsAccessKey("AWS_ACCESS_KEY");
    http.put_AwsSecretKey("AWS_SECRET_KEY");
    http.put_S3Ssl(true);
    http.put_AwsRegion("us-east-1");
    http.put_AwsEndpoint("s3.amazonaws.com");
    http.put_AwsSubResources("versionId=x8UPzRsgskmbe55lEQvhLi25PQl2lcFH");

    const char *bucketName = "chilkat100";
    const char *objectName = "frenchUtf8.txt";
    const char *localFilePath = "qa_output/frenchUtf8.txt";

    bool success = http.S3_DownloadFile(bucketName,objectName,localFilePath);

    if (success != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
    }
    else {
        strOut.append("File downloaded.");
        strOut.append("\r\n");
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }