Delphi ActiveX Google Drive: Create a New Comment on a File

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Creates a new comment on a file. The file is specified by file ID. This example creates a comment on the file having id = "0B5drHSd5ZHwgc3RhcnRlcl9maWxlX2Rhc2hlclYw".

Documentation: https://developers.google.com/drive/v3/reference/comments/create

var
rest: TChilkatRest;
success: Integer;
oauth2: TChilkatOAuth2;
jsonReq: TChilkatJsonObject;
sbReq: TChilkatStringBuilder;
sbJson: TChilkatStringBuilder;
json: TChilkatJsonObject;
authorKind: WideString;
authorDisplayName: WideString;
authorPhotoLink: WideString;
authorMe: Integer;
content: WideString;

begin
rest := TChilkatRest.Create(Self);

//   Provide a previously obtained OAuth2 access token.
oauth2 := TChilkatOAuth2.Create(Self);
oauth2.AccessToken := 'OAUTH2_ACCESS_TOKEN';
rest.SetAuthOAuth2(oauth2.ControlInterface);

success := rest.Connect('www.googleapis.com',443,1,1);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

rest.AddQueryParam('fields','author,content');

//  The following code creates the JSON request body.
//  The JSON created by this code is shown below.
jsonReq := TChilkatJsonObject.Create(Self);
jsonReq.UpdateString('content','This is a test comment about this file...');

sbReq := TChilkatStringBuilder.Create(Self);
jsonReq.EmitSb(sbReq.ControlInterface);

rest.AddHeader('Content-Type','application/json');

sbJson := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestSb('POST','/drive/v3/files/0B5drHSd5ZHwgc3RhcnRlcl9maWxlX2Rhc2hlclYw/comments',sbReq.ControlInterface,sbJson.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

if (rest.ResponseStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Received error response code: ' + IntToStr(rest.ResponseStatusCode));
    Memo1.Lines.Add('Response body:');
    Memo1.Lines.Add(sbJson.GetAsString());
    Exit;
  end;

json := TChilkatJsonObject.Create(Self);
json.LoadSb(sbJson.ControlInterface);

//  The following code parses the JSON response.
//  A sample JSON response is shown below the sample code.

authorKind := json.StringOf('author.kind');
authorDisplayName := json.StringOf('author.displayName');
authorPhotoLink := json.StringOf('author.photoLink');
authorMe := json.BoolOf('author.me');
content := json.StringOf('content');

Memo1.Lines.Add('Example Completed.');

Sample JSON Request Body

{
  "content": "This is a test comment about this file..."
}

Sample JSON Response Body

{
  "author": {
    "kind": "drive#user",
    "displayName": "Matt Fausey",
    "photoLink": "//ssl.gstatic.com/s2/profiles/images/silhouette96.png",
    "me": true
  },
  "content": "This is a test comment about this file..."
}