Visual FoxPro Requires Chilkat v11.0.0+

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. Visual FoxPro

LOCAL lnSuccess
LOCAL loHttp
LOCAL loSbJson
LOCAL loFac
LOCAL loJson
LOCAL lnNumFiles
LOCAL loLastModRemote
LOCAL loLastModLocal
LOCAL loLocalPath
LOCAL loFileUrl
LOCAL i
LOCAL lcFilename
LOCAL lcSLastModified
LOCAL lnBDownload
LOCAL lnNumSeconds

lnSuccess = 0

*  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"

loHttp = CreateObject('Chilkat.Http')

*  If SharePoint Windows classic authentication is used, then set the 
*  Login, Password, LoginDomain, and NtlmAuth properties.
loHttp.Login = "SHAREPOINT_USERNAME"
loHttp.Password = "SHAREPOINT_PASSWORD"
loHttp.LoginDomain = "SHAREPOINT_NTLM_DOMAIN"
loHttp.NtlmAuth = 1

*  -------------------------------------------------------------------------
*  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.
loHttp.Accept = "application/json;odata=verbose"
loHttp.AcceptCharset = "utf-8"

loSbJson = CreateObject('Chilkat.StringBuilder')
lnSuccess = loHttp.QuickGetSb("https://SHAREPOINT_HTTPS_DOMAIN/_api/web/GetFolderByServerRelativeUrl('/Documents')/Files",loSbJson)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loSbJson
    CANCEL
ENDIF

*  Before proceeding, make sure the local directory where we'll be downloading files exists.
loFac = CreateObject('Chilkat.FileAccess')
loFac.DirEnsureExists("qa_output/sharepoint/Documents")

*  OK.. load the JSON and iterate over each file
loJson = CreateObject('Chilkat.JsonObject')
loJson.LoadSb(loSbJson)

lnNumFiles = loJson.SizeOfArray("d.results")
? "Number of Files in the SharePoint /Documents folder = " + STR(lnNumFiles)

loLastModRemote = CreateObject('Chilkat.CkDateTime')
loLastModLocal = CreateObject('Chilkat.CkDateTime')

loLocalPath = CreateObject('Chilkat.StringBuilder')
loFileUrl = CreateObject('Chilkat.StringBuilder')

i = 0
DO WHILE i < lnNumFiles
    loJson.I = i

    lcFilename = loJson.StringOf("d.results[i].Name")
    lcSLastModified = loJson.StringOf("d.results[i].TimeLastModified")

    ? STR(i + 1) + ": " + lcFilename + " (" + lcSLastModified + ")"

    loLastModRemote.SetFromTimestamp(lcSLastModified)

    lnBDownload = 0
    *  Check to see if the local file exists.  If not, then download.
    loLocalPath.SetString("qa_output/sharepoint/Documents/")
    loLocalPath.Append(lcFilename)
    IF (loFac.FileExists(loLocalPath.GetAsString()) <> 1) THEN
        ? "This file does not exist locally."
        lnBDownload = 1
    ELSE
        *  Get the local file's date time and compare with the remote file date/time.
        loLastModLocal.SetFromTimestamp(loFac.GetFileTimeStr(loLocalPath.GetAsString(),0))

        *  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.
        lnNumSeconds = loLastModLocal.DiffSeconds(loLastModRemote)
        IF (lnNumSeconds < 0) THEN
            ? "The local file is older than the remote file."
            lnBDownload = 1
        ENDIF

    ENDIF

    IF (lnBDownload = 1) THEN
        loFileUrl.SetString("https://SHAREPOINT_HTTPS_DOMAIN/_api/web/GetFolderByServerRelativeUrl('/Documents')/Files('")
        loFileUrl.Append(lcFilename)
        loFileUrl.Append("')/$value")

        ? "Downloading " + lcFilename

        lnSuccess = loHttp.Download(loFileUrl.GetAsString(),loLocalPath.GetAsString())
        IF (lnSuccess = 0) THEN
            ? loHttp.LastErrorText
            RELEASE loHttp
            RELEASE loSbJson
            RELEASE loFac
            RELEASE loJson
            RELEASE loLastModRemote
            RELEASE loLastModLocal
            RELEASE loLocalPath
            RELEASE loFileUrl
            CANCEL
        ENDIF

        *  Set the local file's last-modified date/time to that of the server's.
        loFac.SetLastModified(loLocalPath.GetAsString(),loLastModRemote)

    ENDIF

    i = i + 1
ENDDO

? "All finished."

RELEASE loHttp
RELEASE loSbJson
RELEASE loFac
RELEASE loJson
RELEASE loLastModRemote
RELEASE loLastModLocal
RELEASE loLocalPath
RELEASE loFileUrl