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Delphi DLL Examples

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(Delphi DLL) OneDrive -- List Non-Root Directory

This gets the collection of DriveItem children for a non-root DriveItem. This is the same as for getting the children for the root DriveItem, except the URL includes the path to the desired non-root DriveItem.

Note: This example requires Chilkat v9.5.0.68 or greater.

Chilkat for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, JsonObject, CkDateTime;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
resp: PWideChar;
json: HCkJsonObject;
lastMod: HCkDateTime;
photoTaken: HCkDateTime;
i: Integer;
numItems: Integer;

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

http := CkHttp_Create();

// Use your previously obtained access token here:
// See the following examples for getting an access token:
//    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
//    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
//    Refresh Access Token (Azure AD v2.0 Endpoint).
//    Refresh Access Token (Azure AD Endpoint).

// (Make sure your token was obtained with the FilesRead or Files.ReadWrite scope.)
CkHttp_putAuthToken(http,'MICROSOFT_GRAPH_ACCESS_TOKEN');

// Send a Get request like this:
// GET /me/drive/root:/{item-path}:/children

// This example will get the DriveItems in /Misc/old
// (In other words, we're getting the directory listing for /Misc/old.)
CkHttp_SetUrlVar(http,'item_path','/Misc/old');

resp := CkHttp__quickGetStr(http,'https://graph.microsoft.com/v1.0/me/drive/root:{$item_path}:/children');
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// The response should be JSON.
json := CkJsonObject_Create();
CkJsonObject_putEmitCompact(json,False);
CkJsonObject_Load(json,resp);

// A successful response should return a status code of 200.
if (CkHttp_getLastStatus(http) <> 200) then
  begin
    Memo1.Lines.Add(CkJsonObject__emit(json));
    Memo1.Lines.Add('Response status = ' + IntToStr(CkHttp_getLastStatus(http)));
    Exit;
  end;

Memo1.Lines.Add(CkJsonObject__emit(json));

lastMod := CkDateTime_Create();
photoTaken := CkDateTime_Create();

// Iterate over the DriveItems in the JSON response:
i := 0;
numItems := CkJsonObject_SizeOfArray(json,'value');
while i < numItems do
  begin
    CkJsonObject_putI(json,i);
    Memo1.Lines.Add('-- DriveItem ' + IntToStr(i + 1));
    Memo1.Lines.Add('id: ' + CkJsonObject__stringOf(json,'value[i].id'));
    Memo1.Lines.Add('name: ' + CkJsonObject__stringOf(json,'value[i].name'));
    Memo1.Lines.Add('size: ' + IntToStr(CkJsonObject_IntOf(json,'value[i].size')));

    // Get the lastModifiedDateTime
    CkDateTime_SetFromTimestamp(lastMod,CkJsonObject__stringOf(json,'value[i].fileSystemInfo.lastModifiedDateTime'));

    // Is this a folder?
    if (CkJsonObject_HasMember(json,'value[i].folder') = True) then
      begin
        Memo1.Lines.Add('This is a folder with ' + IntToStr(CkJsonObject_IntOf(json,'value[i].folder.childCount')) + ' children');
      end;
    if (CkJsonObject_HasMember(json,'value[i].file') = True) then
      begin
        Memo1.Lines.Add('This is a file.');
        Memo1.Lines.Add('SHA1 hash: ' + CkJsonObject__stringOf(json,'value[i].file.hashes.sha1Hash'));
        Memo1.Lines.Add('mimeType: ' + CkJsonObject__stringOf(json,'value[i].mimeType'));
      end;
    if (CkJsonObject_HasMember(json,'value[i].image') = True) then
      begin
        Memo1.Lines.Add('This is an image.');
        Memo1.Lines.Add('height: ' + IntToStr(CkJsonObject_IntOf(json,'value[i].image.height')));
        Memo1.Lines.Add('width: ' + IntToStr(CkJsonObject_IntOf(json,'value[i].image.width')));
      end;
    if (CkJsonObject_HasMember(json,'value[i].photo') = True) then
      begin
        Memo1.Lines.Add('This is a photo.');
        CkDateTime_SetFromTimestamp(photoTaken,CkJsonObject__stringOf(json,'value[i].photo.takenDateTime'));
        Memo1.Lines.Add('photo taken on ' + CkDateTime__getAsRfc822(photoTaken,True));
      end;
    if (CkJsonObject_HasMember(json,'value[i].audio') = True) then
      begin
        Memo1.Lines.Add('This is an audio file.');
        Memo1.Lines.Add('duration: ' + IntToStr(CkJsonObject_IntOf(json,'value[i].audio.duration')));
      end;

    i := i + 1;
  end;

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkDateTime_Dispose(lastMod);
CkDateTime_Dispose(photoTaken);

end;

 

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