Zig

Google Drive Refresh Access Token

See more Google Drive Examples

Demonstrates how to automatically refresh the access token when it expires. Zig

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

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

    var success: bool = false;

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

    success = true;

    // This example uses a previously obtained access token having permission for the
    // Google Drive scope.

    // The access token (and refresh token) was previously saved to a JSON file with this format:
    // See Get Google Drive OAuth2 Access Token

    // {
    //   "access_token": "ya29.Gls-BsdxTWuenChv ... yzVIrXikkLxu5T6dy4I6GjADFardoz4Lruw",
    //   "expires_in": 3600,
    //   "refresh_token": "1/tMBJ ... 27D-Hk6rpQYBA",
    //   "scope": "https://www.googleapis.com/auth/drive",
    //   "token_type": "Bearer"
    // }

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    const token_file_path = "qa_data/tokens/googleDrive.json";
    json.loadFile(token_file_path) catch {};

    const oauth2 = try chilkat.OAuth2.init();
    defer oauth2.deinit();
    oauth2.setAccessToken(try json.stringOf(alloc, "access_token"));
    oauth2.setRefreshToken(try json.stringOf(alloc, "refresh_token"));

    oauth2.setAuthorizationEndpoint("https://accounts.google.com/o/oauth2/v2/auth");
    oauth2.setTokenEndpoint("https://www.googleapis.com/oauth2/v4/token");

    //  Replace these with actual values.
    oauth2.setClientId("GOOGLE-CLIENT-ID");
    oauth2.setClientSecret("GOOGLE-CLIENT-SECRET");
    oauth2.setScope("https://www.googleapis.com/auth/drive");

    // Use OAuth2 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.getAccessTokenResponse(alloc)});

    // Save the new access token to our JSON file (so we can refresh it again when needed).
    json.updateString("access_token", try oauth2.getAccessToken(alloc)) catch {};

    const fac = try chilkat.FileAccess.init();
    defer fac.deinit();
    fac.writeEntireTextFile(token_file_path, try json.emit(alloc), "utf-8", false) catch {};

    std.debug.print("Access Token Refreshed!\n", .{});
}