/**
* GitHub OAuth handler for Cloudflare Workers OAuth Provider
*/
import type { AuthRequest, OAuthHelpers } from "@cloudflare/workers-oauth-provider";
import { Hono } from "hono";
import { Octokit } from "octokit";
import type { Env } from "../worker/env.js";
import { AuthProps, fetchUpstreamAuthToken, getUpstreamAuthorizeUrl } from "./oauth.js";
import { clientIdAlreadyApproved, parseRedirectApproval, renderApprovalDialog } from "./workers-oauth-utils.js";
const app = new Hono<{ Bindings: Env & { OAUTH_PROVIDER: OAuthHelpers } }>();
app.get("/authorize", async (c) => {
const oauthReqInfo = await c.env.OAUTH_PROVIDER.parseAuthRequest(c.req.raw);
const { clientId } = oauthReqInfo;
if (!clientId) {
return c.text("Invalid request", 400);
}
const cookieSecret = c.env.COOKIE_ENCRYPTION_KEY;
if (!cookieSecret) {
console.error("COOKIE_ENCRYPTION_KEY is not configured");
return c.text("Server configuration error", 500);
}
if (
await clientIdAlreadyApproved(
c.req.raw,
oauthReqInfo.clientId,
cookieSecret
)
) {
return redirectToGithub(c.req.raw, oauthReqInfo, c.env.GITHUB_CLIENT_ID);
}
return renderApprovalDialog(c.req.raw, {
client: await c.env.OAUTH_PROVIDER.lookupClient(clientId),
server: {
provider: "github",
name: "mKit",
logo: "https://avatars.githubusercontent.com/u/314135?s=200&v=4",
description:
"mKit is the official boilerplate for bootstrapping MCP servers on Cloudflare Workers with Stripe integration and Google/GitHub authentication.",
},
state: { oauthReqInfo },
});
});
app.post("/authorize", async (c) => {
const cookieSecret = c.env.COOKIE_ENCRYPTION_KEY;
if (!cookieSecret) {
console.error("COOKIE_ENCRYPTION_KEY is not configured");
return c.text("Server configuration error", 500);
}
const { state, headers } = await parseRedirectApproval(
c.req.raw,
cookieSecret
);
if (!state || typeof state !== "object" || !("oauthReqInfo" in state)) {
return c.text("Invalid request", 400);
}
const oauthReqInfo = (state as { oauthReqInfo: AuthRequest }).oauthReqInfo;
return redirectToGithub(c.req.raw, oauthReqInfo, c.env.GITHUB_CLIENT_ID, headers);
});
async function redirectToGithub(
request: Request,
oauthReqInfo: AuthRequest,
githubClientId: string | undefined,
headers: Record<string, string> = {}
) {
return new Response(null, {
status: 302,
headers: {
...headers,
location: getUpstreamAuthorizeUrl({
upstream_url: "https://github.com/login/oauth/authorize",
scope: "read:user",
client_id: githubClientId || "",
redirect_uri: new URL("/callback/github", request.url).href,
state: btoa(JSON.stringify(oauthReqInfo)),
}),
},
});
}
app.get("/callback/github", async (c) => {
const oauthReqInfo = JSON.parse(atob(c.req.query("state") || "")) as AuthRequest;
if (!oauthReqInfo.clientId) {
return c.text("Invalid state", 400);
}
const [accessToken, errResponse] = await fetchUpstreamAuthToken({
upstream_url: "https://github.com/login/oauth/access_token",
client_id: c.env.GITHUB_CLIENT_ID || "",
client_secret: c.env.GITHUB_CLIENT_SECRET || "",
code: c.req.query("code"),
redirect_uri: new URL("/callback/github", c.req.url).href,
});
if (errResponse) return errResponse;
const user = await new Octokit({ auth: accessToken }).rest.users.getAuthenticated();
const { login, name, email } = user.data;
const { redirectTo } = await c.env.OAUTH_PROVIDER.completeAuthorization({
request: oauthReqInfo,
userId: login,
metadata: {
label: name,
},
scope: oauthReqInfo.scope,
props: {
login,
name,
email,
accessToken,
userEmail: email,
} as AuthProps,
});
return Response.redirect(redirectTo);
});
export { app as GitHubHandler };
