Zig

Hotmail Refresh Access Token (also for Live.com, Outlook.com)

See more OAuth2 Examples

An OAuth2 access token is typically valid for 1 hour. Interaction with the Hotmail account owner via a browser is only needed for getting the initial access token. Once you have it, it can be continually refreshed without user interaction for a long time.

See: How Long can an OAuth2 Access Token be Refreshed?

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.

    // It is assumed we previously obtained an OAuth2 access token.

    // Note: Refreshing an access token does not require user-interaction.
    // Only the act of getting the initial access token requires interactive authorization from the Hotmail account owner
    // (i.e. a browser is displayed and the Hotmail account owner authorizes access by the app).

    // Once you have the initial access token, it can be refreshed for a long time.
    // A typical strategy is to write your application to automatically refresh the access token
    // when authentication fails, and then retry the operation with the new access token.

    const json_token = try chilkat.JsonObject.init();
    defer json_token.deinit();
    json_token.loadFile("qa_data/tokens/hotmail.json") catch {
        std.debug.print("Failed to load office365.json\n", .{});
        return;
    };

    // The access token JSON looks like this:

    // {
    //   "token_type": "Bearer",
    //   "scope": "https://outlook.office.com/SMTP.Send https://outlook.office.com/IMAP.AccessAsUser.All https://outlook.office.com/POP.AccessAsUser.All",
    //   "expires_in": 3600,
    //   "ext_expires_in": 3600,
    //   "access_token": "EwBoA+ ... 7pOYcWr5pFwQgI=",
    //   "refresh_token": "M.C546_BL2.0.U.-CkW ... g5CKSlDBQ$$",
    //   "id_token": "eyJ0e ... 2iiu5iqBK9n7s3A"
    // }

    const oauth2 = try chilkat.OAuth2.init();
    defer oauth2.deinit();

    // See Microsoft OAuth2 Authorization Endpoint
    oauth2.setTokenEndpoint("https://login.microsoftonline.com/common/oauth2/v2.0/token");

    // Replace this with your actual App Registration's Application (client) ID.
    oauth2.setClientId("CLIENT_ID");

    // Get the "refresh_token"
    oauth2.setRefreshToken(try json_token.stringOf(alloc, "refresh_token"));

    // Send the HTTP POST to refresh the access token..
    oauth2.refreshAccessToken() catch {
        std.debug.print("{s}\n", .{try oauth2.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("{s}\n", .{try oauth2.getLastErrorText(alloc)});

    std.debug.print("New access token: {s}\n", .{try oauth2.getAccessToken(alloc)});
    std.debug.print("New refresh token: {s}\n", .{try oauth2.getRefreshToken(alloc)});

    // Update the JSON with the new tokens.
    json_token.updateString("access_token", try oauth2.getAccessToken(alloc)) catch {};
    json_token.updateString("refresh_token", try oauth2.getRefreshToken(alloc)) catch {};

    // Save the new JSON access token response to a file.
    const sb_json = try chilkat.StringBuilder.init();
    defer sb_json.deinit();
    json_token.setEmitCompact(false);
    json_token.emitSb(sb_json) catch {};
    sb_json.writeFile("qa_data/tokens/hotmail.json", "utf-8", false) catch {};

    std.debug.print("OAuth2 authorization granted!\n", .{});
    std.debug.print("New Access Token = {s}\n", .{try oauth2.getAccessToken(alloc)});
}