(Objective-C) Get a List of Message IDs in GMail User's Mailbox

Demonstrates how to get a list of message IDs in a GMail mailbox. The "userId" can be either the user's email address or the special value "me" to indicate the authenticated user.

For more information, see https://developers.google.com/gmail/api/v1/reference/users/messages/list

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoHttp.h>
#import <CkoHttpResponse.h>
#import <CkoJsonObject.h>
#import <NSString.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoHttp *http = [[CkoHttp alloc] init];

http.AuthToken = @"ACCESS_TOKEN";

http.Accept = @"application/json";

CkoHttpResponse *resp = [http QuickRequest: @"GET" url: @"https://www.googleapis.com/gmail/v1/users/userId/messages"];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@%d",@"Response Status Code: ",[resp.StatusCode intValue]);

CkoJsonObject *jsonResponse = [[CkoJsonObject alloc] init];
[jsonResponse Load: resp.BodyStr];
jsonResponse.EmitCompact = NO;
NSLog(@"%@",[jsonResponse Emit]);

if ([resp.StatusCode intValue] != 200) {
    NSLog(@"%@",@"Failed.");

    return;
}

// {
//   "messages": [
//     users.messages Resource
//   ],
//   "nextPageToken": string,
//   "resultSizeEstimate": unsigned integer
// }

NSString *id = 0;
NSString *threadId = 0;

int resultSizeEstimate = [[jsonResponse IntOf: @"resultSizeEstimate"] intValue];
int i = 0;
int count_i = [[jsonResponse SizeOfArray: @"messages"] intValue];
while (i < count_i) {
    jsonResponse.I = [NSNumber numberWithInt: i];
    id = [jsonResponse StringOf: @"messages[i].id"];
    threadId = [jsonResponse StringOf: @"messages[i].threadId"];
    i = i + 1;
}