OAuth

WebHooker implements GitHub OAuth2 to enable user-initiated actions (comment, merge, react).

Flow

User → GET /auth/github → Redirect to GitHub → Authorize →
  → GET /auth/github/callback → Exchange code for token → Store in KV

Endpoints

Start OAuth

GET /auth/github

Redirects the user to GitHub's authorization page.

Query Parameters:

Parameter	Description
redirect	Optional relative path to return to after sign-in (e.g. /admin). Must start with / but not //; any unsafe value falls back to /.

Response: 302 redirect to GitHub OAuth authorize URL.

OAuth Callback

GET /auth/github/callback

GitHub redirects here after authorization. Exchanges the code for an access token and stores it in KV.

Query Parameters (from GitHub):

Parameter	Description
code	Authorization code
state	State parameter for CSRF protection

Response:

• Browser flow (Accept: text/html): sets an admin session cookie, then redirects to the redirect target. Users without admin access are redirected to /admin?error=forbidden.
• JSON flow: returns { "userId": "...", "login": "...", "redirectTo": "..." }.
• Discord link flow (started with a pending discordUserId): links the Discord user to this GitHub account, returning { "ok": true, "discordUserId": "...", "login": "..." } — or a success page in the browser.
• Telegram link flow (started with a pending telegramUserId): links the Telegram user to this GitHub account, returns { "ok": true, "telegramUserId": "...", "login": "..." }, and sends a confirmation message to the pending telegramChatId.

Revoke Token

DELETE /auth/token/:userId

Removes the stored OAuth token for a user.

Response:

{
  "ok": true
}

Token Storage

Tokens are stored in KV with key pattern token:{userId}:

{
  "userId": "12345",
  "accessToken": "gho_...",
  "expiresAt": 1735689600000,
  "refreshToken": "..."
}

expiresAt is a Unix timestamp in milliseconds. KV entries expire at 90% of the token's lifetime (minimum 60 seconds). A reverse index token-reverse:{sha256 of token} maps the access token back to its user id so Bearer-authenticated endpoints can resolve the caller. Discord users linked to a GitHub account are stored in the D1 discord_links table; Telegram users in the D1 telegram_links table.

Using Tokens

After OAuth, include the access token in the Authorization header for action API calls:

curl -X POST https://your-worker/api/comment \
  -H "Authorization: Bearer gho_..." \
  -H "Content-Type: application/json" \
  -d '{"owner": "org", "repo": "repo", "issueNumber": 1, "body": "Hello!"}'