Objective-C

List all Pages of Files in Google Drive

See more Google Drive Examples

Demonstrates how iterate over pages to list files in Google Drive.

See Google Drive Files list for more optional HTTP parameters.

Objective-C

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

BOOL success = NO;

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 5 results per page for testing.  (The default page size is 100, with a max of 1000.
[rest AddQueryParam: @"pageSize" value: @"5"];

CkoJsonObject *json = [[CkoJsonObject alloc] init];
int i;
int numFiles;

// Send the request for the 1st page.
NSString *jsonResponse = [rest FullRequestNoBody: @"GET" uriPath: @"/drive/v3/files"];

int pageNumber = 1;
NSString *pageToken = 0;
BOOL bContinueLoop = rest.LastMethodSuccess && ([rest.ResponseStatusCode intValue] == 200);

while (bContinueLoop == YES) {

    NSLog(@"%@%d%@",@"---- Page ",pageNumber,@" ----");

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

    // See the sample JSON response at the bottom of this example.
    numFiles = [[json SizeOfArray: @"files"] intValue];
    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;
    }

    // Get the next page of files.
    // If the "nextPageToken" is present in the JSON response, then use it in the "pageToken" parameter
    // for the next request.   If no "nextPageToken" was present, then this was the last page of files.
    pageToken = [json StringOf: @"nextPageToken"];
    bContinueLoop = NO;
    BOOL bHasMorePages = json.LastMethodSuccess;
    if (bHasMorePages == YES) {
        [rest ClearAllQueryParams];
        [rest AddQueryParam: @"pageSize" value: @"5"];
        [rest AddQueryParam: @"pageToken" value: pageToken];
        jsonResponse = [rest FullRequestNoBody: @"GET" uriPath: @"/drive/v3/files"];
        bContinueLoop = rest.LastMethodSuccess && ([rest.ResponseStatusCode intValue] == 200);
        pageNumber = pageNumber + 1;
    }

}

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 JSON 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"
//    }
//  ]
// }