Zig

OneDrive -- List Large Directory

See more OneDrive Examples

Demonstrates 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 v9.5.0.97 or greater.

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

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

    // This example uses the OAuth client credentials flow.
    // See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

    // Use your client ID, client secret, and tenant ID in the following lines
    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.updateString("client_id", "2871da2c-8176-4b7f-869b-2311aa82e743") catch {};
    json.updateString("client_secret", "2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH") catch {};
    json.updateString("scope", "https://graph.microsoft.com/.default") catch {};
    json.updateString("token_endpoint", "https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token") catch {};

    const http = try chilkat.Http.init();
    defer http.deinit();
    http.setAuthToken(try json.emit(alloc));

    // This example will get the DriveItems in /lots-of-files, which has 450 children..
    http.setUrlVar("item_path", "/lots-of-files") catch {};
    http.setUrlVar("user_id", "4fe732c3-322e-4a6b-b729-2fd1eb5c6104") catch {};

    var resp: [:0]const u8 = "";
    var i: i32 = 0;
    var num_items: i32 = 0;

    json.setEmitCompact(false);

    // This loop will download DriveItems in sets of 25 until no more exist.
    var b_get_more: bool = true;
    // (Add the $top query parameter to define the page size, i.e. the max number of results to return).
    var next_link: [:0]const u8 = "https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:{$item_path}:/children?$top=25";

    while (b_get_more) {
        // Get the next chunk of DriveItems
        resp = http.quickGetStr(alloc, next_link) catch {
            std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
            return;
        };

        // The response should be JSON.
        json.load(resp) catch {};

        // A successful response should return a status code of 200.
        if (http.getLastStatus() != 200) {
            std.debug.print("{s}\n", .{try json.emit(alloc)});
            std.debug.print("Response status = {d}\n", .{http.getLastStatus()});
            return;
        }

        // Iterate over the DriveItems in the JSON response:
        i = 0;
        num_items = json.sizeOfArray("value");
        while (i < num_items) {
            json.setI(i);
            std.debug.print("name: {s}\n", .{try json.stringOf(alloc, "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\"")) {
            next_link = try json.stringOf(alloc, "\"@odata.nextLink\"");
            std.debug.print("nextLink: {s}\n", .{next_link});
        } else {
            b_get_more = false;
        }
    }
}