Delphi DLL
Delphi DLL
Google Cloud Storage List Bucket Objects
See more Google Cloud Storage Examples
List the objects in a Google Cloud Storage bucket.Chilkat Delphi DLL Downloads
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, HttpResponse, JsonObject;
...
procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
sbToken: HCkStringBuilder;
http: HCkHttp;
resp: HCkHttpResponse;
responseCode: Integer;
json: HCkJsonObject;
id: PWideChar;
selfLink: PWideChar;
mediaLink: PWideChar;
name: PWideChar;
bucket: PWideChar;
generation: PWideChar;
metageneration: PWideChar;
contentType: PWideChar;
storageClass: PWideChar;
size: PWideChar;
md5Hash: PWideChar;
crc32c: PWideChar;
etag: PWideChar;
timeCreated: PWideChar;
updated: PWideChar;
timeStorageClassUpdated: PWideChar;
kind: PWideChar;
i: Integer;
count_i: Integer;
begin
success := False;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// This example uses a previously obtained access token having permission for the
// scope "https://www.googleapis.com/auth/cloud-platform"
// In this example, Get Google Cloud Storage OAuth2 Access Token,
// the service account access token was saved to a text file. This example fetches the access token from the file..
sbToken := CkStringBuilder_Create();
CkStringBuilder_LoadFile(sbToken,'qa_data/tokens/googleCloudStorageAccessToken.txt','utf-8');
http := CkHttp_Create();
CkHttp_putAuthToken(http,CkStringBuilder__getAsString(sbToken));
// For more info see Cloud Storage Documentation - Objects: list
//
success := CkHttp_SetUrlVar(http,'bucket','chilkat-ocean');
success := CkHttp_SetUrlVar(http,'PROJECT_NAME','ChilkatCloud');
resp := CkHttpResponse_Create();
success := CkHttp_HttpNoBody(http,'GET','https://www.googleapis.com/storage/v1/b/{$bucket}/o?project={$ChilkatCloud}',resp);
if (success = False) then
begin
Memo1.Lines.Add(CkHttp__lastErrorText(http));
Exit;
end;
responseCode := CkHttpResponse_getStatusCode(resp);
if (responseCode = 401) then
begin
Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));
Memo1.Lines.Add('If invalid credentials, then it is likely the access token expired.');
Memo1.Lines.Add('Your app should automatically fetch a new access token and re-try.');
Exit;
end;
Memo1.Lines.Add('Response code: ' + IntToStr(responseCode));
Memo1.Lines.Add('Response body');
json := CkJsonObject_Create();
success := CkJsonObject_Load(json,CkHttpResponse__bodyStr(resp));
CkJsonObject_putEmitCompact(json,False);
Memo1.Lines.Add(CkJsonObject__emit(json));
// A response code = 200 indicates success, and the response body contains JSON such as this:
// {
// "kind": "storage#objects",
// "items": [
// {
// "kind": "storage#object",
// "id": "chilkat-ocean/file with space char.jpg/1555776690752366",
// "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/file%20with%20space%20char.jpg",
// "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/file%20with%20space%20char.jpg?generation=1555776690752366&alt=media",
// "name": "file with space char.jpg",
// "bucket": "chilkat-ocean",
// "generation": "1555776690752366",
// "metageneration": "1",
// "contentType": "image/jpeg",
// "storageClass": "MULTI_REGIONAL",
// "size": "6229",
// "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
// "crc32c": "9RjgwQ==",
// "etag": "CO6WguiH3+ECEAE=",
// "timeCreated": "2019-04-20T16:11:30.752Z",
// "updated": "2019-04-20T16:11:30.752Z",
// "timeStorageClassUpdated": "2019-04-20T16:11:30.752Z"
// },
// {
// "kind": "storage#object",
//
// "id": "chilkat-ocean/penguins.jpg/1555775749593296",
// "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/penguins.jpg",
// "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/penguins.jpg?generation=1555775749593296&alt=media",
// "name": "penguins.jpg",
// "bucket": "chilkat-ocean",
// "generation": "1555775749593296",
// "metageneration": "1",
// "contentType": "image/jpeg",
// "storageClass": "MULTI_REGIONAL",
// "size": "777835",
// "md5Hash": "nTd7EM53jEk4s8fixjoimg==",
// "crc32c": "ixxYVw==",
// "etag": "CNCxnqeE3+ECEAE=",
// "timeCreated": "2019-04-20T15:55:49.593Z",
// "updated": "2019-04-20T15:55:49.593Z",
// "timeStorageClassUpdated": "2019-04-20T15:55:49.593Z"
// },
// {
// "kind": "storage#object",
// "id": "chilkat-ocean/starfish.jpg/1628958192639968",
// "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
// "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1628958192639968&alt=media",
// "name": "starfish.jpg",
// "bucket": "chilkat-ocean",
// "generation": "1628958192639968",
// "metageneration": "1",
// "contentType": "image/jpeg",
// "storageClass": "MULTI_REGIONAL",
// "size": "6229",
// "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
// "crc32c": "9RjgwQ==",
// "etag": "COC/tJP2sPICEAE=",
// "timeCreated": "2021-08-14T16:23:12.660Z",
// "updated": "2021-08-14T16:23:12.660Z",
// "timeStorageClassUpdated": "2021-08-14T16:23:12.660Z"
// }
// ]
// }
// Use this online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON
kind := CkJsonObject__stringOf(json,'kind');
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'items');
while i < count_i do
begin
CkJsonObject_putI(json,i);
kind := CkJsonObject__stringOf(json,'items[i].kind');
id := CkJsonObject__stringOf(json,'items[i].id');
selfLink := CkJsonObject__stringOf(json,'items[i].selfLink');
mediaLink := CkJsonObject__stringOf(json,'items[i].mediaLink');
name := CkJsonObject__stringOf(json,'items[i].name');
bucket := CkJsonObject__stringOf(json,'items[i].bucket');
generation := CkJsonObject__stringOf(json,'items[i].generation');
metageneration := CkJsonObject__stringOf(json,'items[i].metageneration');
contentType := CkJsonObject__stringOf(json,'items[i].contentType');
storageClass := CkJsonObject__stringOf(json,'items[i].storageClass');
size := CkJsonObject__stringOf(json,'items[i].size');
md5Hash := CkJsonObject__stringOf(json,'items[i].md5Hash');
crc32c := CkJsonObject__stringOf(json,'items[i].crc32c');
etag := CkJsonObject__stringOf(json,'items[i].etag');
timeCreated := CkJsonObject__stringOf(json,'items[i].timeCreated');
updated := CkJsonObject__stringOf(json,'items[i].updated');
timeStorageClassUpdated := CkJsonObject__stringOf(json,'items[i].timeStorageClassUpdated');
i := i + 1;
end;
CkStringBuilder_Dispose(sbToken);
CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp);
CkJsonObject_Dispose(json);
end;