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DataFlex Examples

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(DataFlex) S3 List Bucket Objects (using Chilkat REST)

Demonstrates how to fetch a list of objects in an S3 bucket.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoRest
    Boolean iBTls
    Integer iPort
    Boolean iBAutoReconnect
    Boolean iSuccess
    Variant vAuthAws
    Handle hoAuthAws
    Variant vSbResponse
    Handle hoSbResponse
    Integer iStatusCode
    Handle hoXml
    String sKey
    String sLastModified
    String sETag
    String sSizeDecimalStr
    String sID
    String sDisplayName
    String sStorageClass
    String sName
    Integer iMaxKeys
    String sIsTruncated
    Integer i
    Integer iCount_i
    String sTemp1

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

    Get Create (RefClass(cComChilkatRest)) To hoRest
    If (Not(IsComObjectCreated(hoRest))) Begin
        Send CreateComObject of hoRest
    End

    // Connect to the Amazon AWS REST server.
    Move True To iBTls
    Move 443 To iPort
    Move True To iBAutoReconnect
    Get ComConnect Of hoRest "s3.amazonaws.com" iPort iBTls iBAutoReconnect To iSuccess

    // ----------------------------------------------------------------------------
    // 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.
    Get Create (RefClass(cComChilkatAuthAws)) To hoAuthAws
    If (Not(IsComObjectCreated(hoAuthAws))) Begin
        Send CreateComObject of hoAuthAws
    End
    Set ComAccessKey Of hoAuthAws To "AWS_ACCESS_KEY"
    Set ComSecretKey Of hoAuthAws To "AWS_SECRET_KEY"
    Set ComServiceName Of hoAuthAws To "s3"
    Get pvComObject of hoAuthAws to vAuthAws
    Get ComSetAuthAws Of hoRest vAuthAws To iSuccess

    //  Set the bucket name via the HOST header.
    //  In this case, the bucket name is "chilkat100".
    Set ComHost Of hoRest To "chilkat100.s3.amazonaws.com"

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbResponse
    If (Not(IsComObjectCreated(hoSbResponse))) Begin
        Send CreateComObject of hoSbResponse
    End
    Get pvComObject of hoSbResponse to vSbResponse
    Get ComFullRequestNoBodySb Of hoRest "GET" "/" vSbResponse To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoRest To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComResponseStatusCode Of hoRest To iStatusCode
    Showln "Response status code = " iStatusCode

    Get Create (RefClass(cComChilkatXml)) To hoXml
    If (Not(IsComObjectCreated(hoXml))) Begin
        Send CreateComObject of hoXml
    End
    Get pvComObject of hoSbResponse to vSbResponse
    Get ComLoadSb Of hoXml vSbResponse True To iSuccess
    Get ComGetXml Of hoXml To sTemp1
    Showln sTemp1

    If (iStatusCode <> 200) Begin
        Showln "Failed.  See error information in the XML."
        Procedure_Return
    End

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

    Get ComGetChildContent Of hoXml "Name" To sName
    Get ComGetChildIntValue Of hoXml "MaxKeys" To iMaxKeys
    Get ComGetChildContent Of hoXml "IsTruncated" To sIsTruncated
    Move 0 To i
    Get ComNumChildrenHavingTag Of hoXml "Contents" To iCount_i
    While (i < iCount_i)
        Set ComI Of hoXml To i
        Get ComGetChildContent Of hoXml "Contents[i]|Key" To sKey
        Get ComGetChildContent Of hoXml "Contents[i]|LastModified" To sLastModified
        Get ComGetChildContent Of hoXml "Contents[i]|ETag" To sETag
        Get ComGetChildContent Of hoXml "Contents[i]|Size" To sSizeDecimalStr
        Get ComGetChildContent Of hoXml "Contents[i]|Owner|ID" To sID
        Get ComGetChildContent Of hoXml "Contents[i]|Owner|DisplayName" To sDisplayName
        Get ComGetChildContent Of hoXml "Contents[i]|StorageClass" To sStorageClass
        Move (i + 1) To i
    Loop



End_Procedure

 

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