Zig Requires Chilkat v10.1.2+

X.com OAuth 2.0 Refresh Access Token

See more X Examples

Demonstrates how to get an X.com OAuth2 access token from a desktop application or script. 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 json_token = try chilkat.JsonObject.init();
    defer json_token.deinit();
    json_token.loadFile("qa_data/tokens/x.json") catch {
        std.debug.print("Failed to load x.json\n", .{});
        return;
    };

    // The access token JSON looks something like this:

    // {
    //   "token_type": "bearer",
    //   "expires_in": 7200,
    //   "access_token": "VmNDLVZiYUZwejY5Mkx3RblFTmo3ek1leTRGclMuZFVOUTVUTWpNbVZKb1N5OjE3NDAxNjk4MDVxNTE6MToxOaF0OjE",
    //   "scope": "block.read follows.read offline.access tweet.write block.write like.write like.read users.read tweet.read follows.write",
    //   "refresh_token": "eThOWVVFSTRqdVp3QTFndGsxM2ZGZmFyNWVrU0phM1JKbGdrbGNWRGJzb1loOjE3NDAwMjk4MDUxNTI6MTowOnJ0OjE"
    // }

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

    oauth2.setTokenEndpoint("https://api.x.com/2/oauth2/token");

    // Replace this with your actual X.com OAuth2 Client ID and Client Secret
    oauth2.setClientId("OAUTH2_CLIENT_ID");
    oauth2.setClientSecret("OAUTH2_CLIENT_SECRET");

    // 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;
    };

    // Load the access token response into the json object
    json_token.load(try oauth2.getAccessTokenResponse(alloc)) catch {};

    // If an "expires_on" member does not exist, then add the JSON member by
    // getting the current system date/time and adding the "expires_in" seconds.
    // This way we'll know when the token expires.
    if (!json_token.hasMember("expires_on")) {
        const dt_expire = try chilkat.DateTime.init();
        defer dt_expire.deinit();
        dt_expire.setFromCurrentSystemTime() catch {};
        dt_expire.addSeconds(json_token.intOf("expires_in")) catch {};
        json_token.appendString("expires_on", try dt_expire.getAsUnixTimeStr(alloc, false)) catch {};
    }

    // Save the new JSON access token response to a file.
    // The access + refresh tokens contained in this JSON will be needed for the next refresh.
    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/x.json", "utf-8", false) catch {};

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