Zig Requires Chilkat v11.0.0+

Azure OAuth2 Client Credentials Grant Flow

See more OAuth2 Examples

Demonstrates how to get an OAuth2 access token for an Azure Registered App using the Client Credentials Grant Flow.

Note: Your Azure app must be registered as a single-tenant app to use client credentials.

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.

    const http = try chilkat.Http.init();
    defer http.deinit();

    const req = try chilkat.HttpRequest.init();
    defer req.deinit();
    req.addParam("client_secret", "CLIENT_SECRET");
    req.addParam("client_id", "CLIENT_ID");

    // See Understanding Scopes in Azure OAuth2 Client Credentials Flow
    req.addParam("scope", "https://graph.microsoft.com/.default");

    req.addParam("grant_type", "client_credentials");

    // Note: Your Azure app must be registered as a single-tenant app to use client credentials.
    // Use your own tenant ID, for example 4d8fdd66-66d1-43b0-ae5c-e31b4b7de5cd
    const url = "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token";

    req.setHttpVerb("POST");
    req.setContentType("application/x-www-form-urlencoded");

    const resp = try chilkat.HttpResponse.init();
    defer resp.deinit();
    http.httpReq(url, req, resp) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    const status_code = resp.getStatusCode();
    std.debug.print("Response status code = {d}\n", .{status_code});

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.load(try resp.getBodyStr(alloc)) catch {};

    json.setEmitCompact(false);
    std.debug.print("{s}\n", .{try json.emit(alloc)});

    // Sample successful output:

    // {
    //   "token_type": "Bearer",
    //   "expires_in": 3599,
    //   "ext_expires_in": 3599,
    //   "access_token": "eyJ0eX...K0jOERg"
    // }

    if (status_code == 200) {
        json.writeFile("qa_data/tokens/azureClientCredentialsToken.json") catch {};
        std.debug.print("Success.\n", .{});
    } else {
        std.debug.print("Failed.\n", .{});
    }
}