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(Objective-C) List Files in Google Drive

Demonstrates how to list files in Google Drive.

See Google Drive Files list for more optional HTTP parameters.

Chilkat Objective-C Library Downloads

MAC OS X (Cocoa) Libs

iOS Libs

#import <CkoAuthGoogle.h>
#import <CkoRest.h>
#import <NSString.h>
#import <CkoJsonObject.h>

BOOL success = YES;

//  It 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
//  Google Drive scope.

CkoAuthGoogle *gAuth = [[CkoAuthGoogle alloc] init];
gAuth.AccessToken = @"GOOGLE-DRIVE-ACCESS-TOKEN";

CkoRest *rest = [[CkoRest alloc] init];

//  Connect using TLS.
BOOL bAutoReconnect = YES;
success = [rest Connect: @"www.googleapis.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: bAutoReconnect];

//  Provide the authentication credentials (i.e. the access token)
[rest SetAuthGoogle: gAuth];

//  Get 4 results per page.  (The default page size is 100, with a max of 1000.
[rest AddQueryParam: @"pageSize" value: @"4"];

//  This uses the Google Drive V3 API... (not V2)
NSString *jsonResponse = [rest FullRequestNoBody: @"GET" uriPath: @"/drive/v3/files"];
if (rest.LastMethodSuccess != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

//  A successful response will have a status code equal to 200.
if ([rest.ResponseStatusCode intValue] != 200) {
    NSLog(@"%@%d",@"response status code = ",[rest.ResponseStatusCode intValue]);
    NSLog(@"%@%@",@"response status text = ",rest.ResponseStatusText);
    NSLog(@"%@%@",@"response header: ",rest.ResponseHeader);
    NSLog(@"%@%@",@"response JSON: ",jsonResponse);
    return;
}

//  A successful response looks like this:
// {
//   "kind": "drive#fileList",
//   "files": [
//     {
//       "kind": "drive#file",
//       "id": "0B53Q6OSTWYolenpjTEU4ekJlQUU",
//       "name": "test",
//       "mimeType": "application/vnd.google-apps.folder"
//     },
//     {
//       "kind": "drive#file",
//       "id": "0B53Q6OSTWYolRm4ycjZtdXhRaEE",
//       "name": "starfish4.jpg",
//       "mimeType": "image/jpeg"
//     },
//     {
//       "kind": "drive#file",
//       "id": "0B53Q6OSTWYolMWt2VzN0Qlo1UjA",
//       "name": "hamlet2.xml",
//       "mimeType": "text/xml"
//     },
//  ...
//     {
//       "kind": "drive#file",
//       "id": "0B53Q6OSTWYolc3RhcnRlcl9maWxlX2Rhc2hlclYw",
//       "name": "Getting started",
//       "mimeType": "application/pdf"
//     }
//   ]
// }

//  Iterate over each file in the response and show the name, id, and mimeType.
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json Load: jsonResponse];

//  Show the full JSON response.
json.EmitCompact = NO;
NSLog(@"%@",[json Emit]);

int numFiles = [[json SizeOfArray: @"files"] intValue];
int i = 0;
while (i < numFiles) {
    json.I = [NSNumber numberWithInt: i];
    NSLog(@"%@%@",@"name: ",[json StringOf: @"files[i].name"]);
    NSLog(@"%@%@",@"id: ",[json StringOf: @"files[i].id"]);
    NSLog(@"%@%@",@"mimeType: ",[json StringOf: @"files[i].mimeType"]);
    NSLog(@"%@",@"-");
    i = i + 1;
}
 

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