(DataFlex) SharePoint -- Download Newer Files

See more SharePoint Examples

Demonstrates how to download all files from a SharePoint folder that are newer than the local files.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoHttp
    Variant vSbJson
    Handle hoSbJson
    Boolean iSuccess
    Handle hoFac
    Handle hoJson
    Integer iNumFiles
    Variant vLastModRemote
    Handle hoLastModRemote
    Variant vLastModLocal
    Handle hoLastModLocal
    Handle hoLocalPath
    Handle hoFileUrl
    Integer i
    String sFilename
    String sSLastModified
    Boolean iBDownload
    Integer iNumSeconds
    String sTemp1
    String sTemp2
    Boolean bTemp1

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

    // -------------------------------------------------------------------------
    // The following comments apply to SharePoint Windows classic authentication.
    // -------------------------------------------------------------------------
    // For example, imagine our SharePoint endpoint is https://xyzoffice.mycompany.com/
    // The SHAREPOINT_NTLM_DOMAIN would be "mycompany.com"
    // The SHAREPOINT_HTTPS_DOMAIN would be "xyzoffice.mycompany.com"
    // Also, the SHAREPOINT_USERNAME would be just the name, not a full email address.
    // for example, "chilkat" instead of "chilkat@mycompany.com"

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End

    // If SharePoint Windows classic authentication is used, then set the 
    // Login, Password, LoginDomain, and NtlmAuth properties.
    Set ComLogin Of hoHttp To "SHAREPOINT_USERNAME"
    Set ComPassword Of hoHttp To "SHAREPOINT_PASSWORD"
    Set ComLoginDomain Of hoHttp To "SHAREPOINT_NTLM_DOMAIN"
    Set ComNtlmAuth Of hoHttp To True

    // -------------------------------------------------------------------------
    // The more common case is to use SharePoint Online authentication (via the SPOIDCRL cookie).
    // If so, do not set Login, Password, LoginDomain, and NtlmAuth, and instead
    // establish the cookie as shown at SharePoint Online Authentication
    // -------------------------------------------------------------------------

    // First we'll download a list of all the files in the /Documents folder.
    // This provides the names and last-modified date/times of the files located
    // on the SharePoint server.
    Set ComAccept Of hoHttp To "application/json;odata=verbose"
    Set ComAcceptCharset Of hoHttp To "utf-8"

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbJson
    If (Not(IsComObjectCreated(hoSbJson))) Begin
        Send CreateComObject of hoSbJson
    End
    Get pvComObject of hoSbJson to vSbJson
    Get ComQuickGetSb Of hoHttp "https://SHAREPOINT_HTTPS_DOMAIN/_api/web/GetFolderByServerRelativeUrl('/Documents')/Files" vSbJson To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Before proceeding, make sure the local directory where we'll be downloading files exists.
    Get Create (RefClass(cComCkFileAccess)) To hoFac
    If (Not(IsComObjectCreated(hoFac))) Begin
        Send CreateComObject of hoFac
    End
    Get ComDirEnsureExists Of hoFac "qa_output/sharepoint/Documents" To iSuccess

    // OK.. load the JSON and iterate over each file
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get pvComObject of hoSbJson to vSbJson
    Get ComLoadSb Of hoJson vSbJson To iSuccess

    Get ComSizeOfArray Of hoJson "d.results" To iNumFiles
    Showln "Number of Files in the SharePoint /Documents folder = " iNumFiles

    Get Create (RefClass(cComCkDateTime)) To hoLastModRemote
    If (Not(IsComObjectCreated(hoLastModRemote))) Begin
        Send CreateComObject of hoLastModRemote
    End

    Get Create (RefClass(cComChilkatStringBuilder)) To hoLocalPath
    If (Not(IsComObjectCreated(hoLocalPath))) Begin
        Send CreateComObject of hoLocalPath
    End
    Get Create (RefClass(cComChilkatStringBuilder)) To hoFileUrl
    If (Not(IsComObjectCreated(hoFileUrl))) Begin
        Send CreateComObject of hoFileUrl
    End

    Move 0 To i
    While (i < iNumFiles)
        Set ComI Of hoJson To i

        Get ComStringOf Of hoJson "d.results[i].Name" To sFilename
        Get ComStringOf Of hoJson "d.results[i].TimeLastModified" To sSLastModified

        Showln (i + 1) ": " sFilename " (" sSLastModified ")"

        Get ComSetFromTimestamp Of hoLastModRemote sSLastModified To iSuccess

        Move False To iBDownload
        // Check to see if the local file exists.  If not, then download.
        Get ComSetString Of hoLocalPath "qa_output/sharepoint/Documents/" To iSuccess
        Get ComAppend Of hoLocalPath sFilename To iSuccess
        Get ComFileExists Of hoFac (ComGetAsString(hoLocalPath)) To bTemp1
        If (bTemp1 <> True) Begin
            Showln "This file does not exist locally."
            Move True To iBDownload
        End
        Else Begin
            // Get the local file's date time and compare with the remote file date/time.
            Get ComGetAsString Of hoLocalPath To sTemp1
            Get ComGetLastModified Of hoFac sTemp1 To vLastModLocal
            If (IsComObject(vLastModLocal)) Begin
                Get Create (RefClass(cComCkDateTime)) To hoLastModLocal
                Set pvComObject Of hoLastModLocal To vLastModLocal
            End
            Get ComLastMethodSuccess Of hoFac To bTemp1
            If (bTemp1 = True) Begin
                // Get the difference in seconds between the local and remote last-modified times.
                // if the return value is negative, then the caller's time is 
                // older than the argument.  (in this case, a negative return value means
                // the local file is older than the remote file.

                // Note: The DiffSeconds method was found to be missing in the Chilkat .NET build
                // (and possibly in other builds). It will be present in the v9.5.0.67 release and later.
                Get pvComObject of hoLastModRemote to vLastModRemote
                Get ComDiffSeconds Of hoLastModLocal vLastModRemote To iNumSeconds
                If (iNumSeconds < 0) Begin
                    Showln "The local file is older than the remote file."
                    Move True To iBDownload
                End

                Send Destroy of hoLastModLocal
            End
            Else Begin
                Showln "Unable to get the local file's last-modified date/time."
                Get ComLastErrorText Of hoFac To sTemp1
                Showln sTemp1
            End

        End

        If (iBDownload = True) Begin
            Get ComSetString Of hoFileUrl "https://SHAREPOINT_HTTPS_DOMAIN/_api/web/GetFolderByServerRelativeUrl('/Documents')/Files('" To iSuccess
            Get ComAppend Of hoFileUrl sFilename To iSuccess
            Get ComAppend Of hoFileUrl "')/$value" To iSuccess

            Showln "Downloading " sFilename

            Get ComGetAsString Of hoFileUrl To sTemp1
            Get ComGetAsString Of hoLocalPath To sTemp2
            Get ComDownload Of hoHttp sTemp1 sTemp2 To iSuccess
            If (iSuccess <> True) Begin
                Get ComLastErrorText Of hoHttp To sTemp1
                Showln sTemp1
                Procedure_Return
            End

            // Set the local file's last-modified date/time to that of the server's.
            Get ComGetAsString Of hoLocalPath To sTemp1
            Get pvComObject of hoLastModRemote to vLastModRemote
            Get ComSetLastModified Of hoFac sTemp1 vLastModRemote To iSuccess

        End

        Move (i + 1) To i
    Loop

    Showln "All finished."


End_Procedure