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(Objective-C) OneDrive -- List Large DirectoryDemonstrates how to get the entire collection of DriveItem children when the collection is large and multiple pages need to be requested. To test this example, I created a DriveItem with 450 children. Note: This example requires Chilkat v9.5.0.68 or greater.
#import <CkoHttp.h> #import <NSString.h> #import <CkoJsonObject.h> // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkoHttp *http = [[CkoHttp alloc] init]; // 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.) http.AuthToken = @"MICROSOFT_GRAPH_ACCESS_TOKEN"; // This example will get the DriveItems in /lots-of-files, which has 450 children.. [http SetUrlVar: @"item_path" value: @"/lots-of-files"]; NSString *resp = 0; int i; int numItems; CkoJsonObject *json = [[CkoJsonObject alloc] init]; json.EmitCompact = NO; // This loop will download DriveItems in sets of 50 until no more exist. BOOL bGetMore = YES; // (Add the $top query parameter to define the page size, i.e. the max number of results to return). NSString *nextLink = @"https://graph.microsoft.com/v1.0/me/drive/root:{$item_path}:/children?$top=50"; while ((bGetMore == YES)) { // Get the next chunk of DriveItems resp = [http QuickGetStr: nextLink]; if (http.LastMethodSuccess != YES) { NSLog(@"%@",http.LastErrorText); return; } // The response should be JSON. [json Load: resp]; // A successful response should return a status code of 200. if ([http.LastStatus intValue] != 200) { NSLog(@"%@",[json Emit]); NSLog(@"%@%d",@"Response status = ",[http.LastStatus intValue]); return; } // Iterate over the DriveItems in the JSON response: i = 0; numItems = [[json SizeOfArray: @"value"] intValue]; while (i < numItems) { json.I = [NSNumber numberWithInt: i]; NSLog(@"%@%@",@"name: ",[json StringOf: @"value[i].name"]); i = i + 1; } // If a nextLink was included in the JSON, use it to get the next set of 50 DriveItems. // Otherwise, exit the loop. if ([json HasMember: @"\"@odata.nextLink\""] == YES) { nextLink = [json StringOf: @"\"@odata.nextLink\""]; NSLog(@"%@%@",@"nextLink: ",nextLink); } else { bGetMore = NO; } } |
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