feat(openai): add responses websocket transport (#29477)
This commit is contained in:
Aiden Cline
@@ -0,0 +1,650 @@
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import type { Hooks, PluginInput } from "@opencode-ai/plugin"
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import * as Log from "@opencode-ai/core/util/log"
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import { InstallationVersion } from "@opencode-ai/core/installation/version"
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import { OAUTH_DUMMY_KEY } from "../../auth"
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import os from "os"
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import { setTimeout as sleep } from "node:timers/promises"
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import { createServer } from "http"
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import { OpenAIWebSocketPool } from "./ws-pool"
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const log = Log.create({ service: "plugin.codex" })
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const CLIENT_ID = "app_EMoamEEZ73f0CkXaXp7hrann"
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const ISSUER = "https://auth.openai.com"
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const CODEX_API_ENDPOINT = "https://chatgpt.com/backend-api/codex/responses"
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const OAUTH_PORT = 1455
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const OAUTH_POLLING_SAFETY_MARGIN_MS = 3000
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const ALLOWED_MODELS = new Set([
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"gpt-5.5",
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"gpt-5.2",
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"gpt-5.3-codex",
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"gpt-5.3-codex-spark",
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"gpt-5.4",
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"gpt-5.4-mini",
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])
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interface PkceCodes {
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verifier: string
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challenge: string
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}
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async function generatePKCE(): Promise<PkceCodes> {
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const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~"
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const verifier = Array.from(crypto.getRandomValues(new Uint8Array(43)))
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.map((b) => chars[b % chars.length])
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.join("")
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const challenge = base64UrlEncode(await crypto.subtle.digest("SHA-256", new TextEncoder().encode(verifier)))
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return { verifier, challenge }
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}
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function base64UrlEncode(buffer: ArrayBuffer): string {
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const bytes = new Uint8Array(buffer)
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const binary = String.fromCharCode(...bytes)
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return btoa(binary).replace(/\+/g, "-").replace(/\//g, "_").replace(/=+$/, "")
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}
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export interface IdTokenClaims {
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chatgpt_account_id?: string
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organizations?: Array<{ id: string }>
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email?: string
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"https://api.openai.com/auth"?: {
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chatgpt_account_id?: string
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}
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}
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export function parseJwtClaims(token: string): IdTokenClaims | undefined {
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const parts = token.split(".")
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if (parts.length !== 3) return undefined
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try {
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return JSON.parse(Buffer.from(parts[1], "base64url").toString())
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} catch {
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return undefined
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}
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}
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export function extractAccountIdFromClaims(claims: IdTokenClaims): string | undefined {
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return (
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claims.chatgpt_account_id ||
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claims["https://api.openai.com/auth"]?.chatgpt_account_id ||
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claims.organizations?.[0]?.id
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)
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}
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export function extractAccountId(tokens: TokenResponse): string | undefined {
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if (tokens.id_token) {
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const claims = parseJwtClaims(tokens.id_token)
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const accountId = claims && extractAccountIdFromClaims(claims)
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if (accountId) return accountId
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}
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if (tokens.access_token) {
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const claims = parseJwtClaims(tokens.access_token)
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return claims ? extractAccountIdFromClaims(claims) : undefined
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}
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return undefined
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}
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function buildAuthorizeUrl(redirectUri: string, pkce: PkceCodes, state: string): string {
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const params = new URLSearchParams({
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response_type: "code",
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client_id: CLIENT_ID,
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redirect_uri: redirectUri,
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scope: "openid profile email offline_access",
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code_challenge: pkce.challenge,
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code_challenge_method: "S256",
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id_token_add_organizations: "true",
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codex_cli_simplified_flow: "true",
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state,
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originator: "opencode",
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})
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return `${ISSUER}/oauth/authorize?${params.toString()}`
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}
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interface TokenResponse {
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id_token: string
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access_token: string
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refresh_token: string
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expires_in?: number
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}
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interface CodexAuthPluginOptions {
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issuer?: string
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codexApiEndpoint?: string
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experimentalWebSockets?: boolean
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}
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async function exchangeCodeForTokens(code: string, redirectUri: string, pkce: PkceCodes): Promise<TokenResponse> {
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const response = await fetch(`${ISSUER}/oauth/token`, {
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method: "POST",
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headers: { "Content-Type": "application/x-www-form-urlencoded" },
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body: new URLSearchParams({
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grant_type: "authorization_code",
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code,
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redirect_uri: redirectUri,
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client_id: CLIENT_ID,
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code_verifier: pkce.verifier,
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}).toString(),
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})
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if (!response.ok) {
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throw new Error(`Token exchange failed: ${response.status}`)
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}
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return response.json()
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}
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async function refreshAccessToken(refreshToken: string, issuer = ISSUER): Promise<TokenResponse> {
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const response = await fetch(`${issuer}/oauth/token`, {
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method: "POST",
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headers: { "Content-Type": "application/x-www-form-urlencoded" },
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body: new URLSearchParams({
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grant_type: "refresh_token",
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refresh_token: refreshToken,
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client_id: CLIENT_ID,
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}).toString(),
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})
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if (!response.ok) {
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throw new Error(`Token refresh failed: ${response.status}`)
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}
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return response.json()
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}
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const HTML_SUCCESS = `<!doctype html>
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<html>
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<head>
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<title>OpenCode - Codex Authorization Successful</title>
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<style>
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body {
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font-family:
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system-ui,
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-apple-system,
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sans-serif;
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display: flex;
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justify-content: center;
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align-items: center;
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height: 100vh;
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margin: 0;
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background: #131010;
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color: #f1ecec;
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}
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.container {
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text-align: center;
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padding: 2rem;
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}
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h1 {
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color: #f1ecec;
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margin-bottom: 1rem;
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}
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p {
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color: #b7b1b1;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<h1>Authorization Successful</h1>
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<p>You can close this window and return to OpenCode.</p>
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</div>
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<script>
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setTimeout(() => window.close(), 2000)
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</script>
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</body>
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</html>`
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const HTML_ERROR = (error: string) => `<!doctype html>
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<html>
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<head>
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<title>OpenCode - Codex Authorization Failed</title>
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<style>
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body {
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font-family:
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system-ui,
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-apple-system,
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sans-serif;
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display: flex;
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justify-content: center;
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align-items: center;
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height: 100vh;
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margin: 0;
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background: #131010;
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color: #f1ecec;
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}
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.container {
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text-align: center;
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padding: 2rem;
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}
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h1 {
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color: #fc533a;
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margin-bottom: 1rem;
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}
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p {
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color: #b7b1b1;
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}
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.error {
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color: #ff917b;
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font-family: monospace;
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margin-top: 1rem;
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padding: 1rem;
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background: #3c140d;
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border-radius: 0.5rem;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<h1>Authorization Failed</h1>
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<p>An error occurred during authorization.</p>
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<div class="error">${error}</div>
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</div>
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</body>
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</html>`
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interface PendingOAuth {
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pkce: PkceCodes
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state: string
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resolve: (tokens: TokenResponse) => void
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reject: (error: Error) => void
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}
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let oauthServer: ReturnType<typeof createServer> | undefined
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let pendingOAuth: PendingOAuth | undefined
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async function startOAuthServer(): Promise<{ port: number; redirectUri: string }> {
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if (oauthServer) {
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return { port: OAUTH_PORT, redirectUri: `http://localhost:${OAUTH_PORT}/auth/callback` }
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}
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oauthServer = createServer((req, res) => {
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const url = new URL(req.url || "/", `http://localhost:${OAUTH_PORT}`)
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if (url.pathname === "/auth/callback") {
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const code = url.searchParams.get("code")
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const state = url.searchParams.get("state")
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const error = url.searchParams.get("error")
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const errorDescription = url.searchParams.get("error_description")
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if (error) {
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const errorMsg = errorDescription || error
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pendingOAuth?.reject(new Error(errorMsg))
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pendingOAuth = undefined
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res.writeHead(200, { "Content-Type": "text/html" })
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res.end(HTML_ERROR(errorMsg))
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return
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}
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if (!code) {
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const errorMsg = "Missing authorization code"
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pendingOAuth?.reject(new Error(errorMsg))
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pendingOAuth = undefined
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res.writeHead(400, { "Content-Type": "text/html" })
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res.end(HTML_ERROR(errorMsg))
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return
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}
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if (!pendingOAuth || state !== pendingOAuth.state) {
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const errorMsg = "Invalid state - potential CSRF attack"
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pendingOAuth?.reject(new Error(errorMsg))
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pendingOAuth = undefined
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res.writeHead(400, { "Content-Type": "text/html" })
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res.end(HTML_ERROR(errorMsg))
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return
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}
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const current = pendingOAuth
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pendingOAuth = undefined
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exchangeCodeForTokens(code, `http://localhost:${OAUTH_PORT}/auth/callback`, current.pkce)
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.then((tokens) => current.resolve(tokens))
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.catch((err) => current.reject(err))
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res.writeHead(200, { "Content-Type": "text/html" })
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res.end(HTML_SUCCESS)
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return
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}
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if (url.pathname === "/cancel") {
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pendingOAuth?.reject(new Error("Login cancelled"))
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pendingOAuth = undefined
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res.writeHead(200)
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res.end("Login cancelled")
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return
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}
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res.writeHead(404)
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res.end("Not found")
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})
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await new Promise<void>((resolve, reject) => {
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oauthServer!.listen(OAUTH_PORT, () => {
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log.info("codex oauth server started", { port: OAUTH_PORT })
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resolve()
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})
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oauthServer!.on("error", reject)
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})
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return { port: OAUTH_PORT, redirectUri: `http://localhost:${OAUTH_PORT}/auth/callback` }
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}
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function stopOAuthServer() {
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if (oauthServer) {
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oauthServer.close(() => {
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log.info("codex oauth server stopped")
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})
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oauthServer = undefined
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}
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}
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function waitForOAuthCallback(pkce: PkceCodes, state: string): Promise<TokenResponse> {
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return new Promise((resolve, reject) => {
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const timeout = setTimeout(
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() => {
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if (pendingOAuth) {
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pendingOAuth = undefined
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reject(new Error("OAuth callback timeout - authorization took too long"))
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}
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},
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5 * 60 * 1000,
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) // 5 minute timeout
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pendingOAuth = {
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pkce,
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state,
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resolve: (tokens) => {
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clearTimeout(timeout)
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resolve(tokens)
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},
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reject: (error) => {
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clearTimeout(timeout)
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reject(error)
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},
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}
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})
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}
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export async function CodexAuthPlugin(input: PluginInput, options: CodexAuthPluginOptions = {}): Promise<Hooks> {
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const issuer = options.issuer ?? ISSUER
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const codexApiEndpoint = options.codexApiEndpoint ?? CODEX_API_ENDPOINT
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let websocketFetchInstalled = false
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const websocketFetches: Array<ReturnType<typeof OpenAIWebSocketPool.createWebSocketFetch>> = []
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return {
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async dispose() {
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for (const websocketFetch of websocketFetches) websocketFetch.close()
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websocketFetches.length = 0
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},
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provider: {
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id: "openai",
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async models(provider, ctx) {
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if (ctx.auth?.type !== "oauth") return provider.models
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return Object.fromEntries(
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Object.entries(provider.models)
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.filter(([, model]) => {
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if (ALLOWED_MODELS.has(model.api.id)) return true
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const match = model.api.id.match(/^gpt-(\d+\.\d+)/)
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return match ? parseFloat(match[1]) > 5.4 : false
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})
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.map(([modelID, model]) => [
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modelID,
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{
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...model,
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cost: {
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input: 0,
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output: 0,
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cache: { read: 0, write: 0 },
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},
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limit: model.id.includes("gpt-5.5")
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? {
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context: 400_000,
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input: 272_000,
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output: 128_000,
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}
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: model.limit,
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},
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]),
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)
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},
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},
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auth: {
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provider: "openai",
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async loader(getAuth) {
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const auth = await getAuth()
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const websocketFetch = options.experimentalWebSockets
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? OpenAIWebSocketPool.createWebSocketFetch({ httpFetch: fetch })
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: undefined
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if (websocketFetch) {
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websocketFetches.push(websocketFetch)
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websocketFetchInstalled = true
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}
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if (auth.type !== "oauth") return websocketFetch ? { fetch: websocketFetch } : {}
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let refreshPromise:
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| Promise<{
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access: string
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accountId: string | undefined
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}>
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| undefined
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return {
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apiKey: OAUTH_DUMMY_KEY,
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async fetch(requestInput: RequestInfo | URL, init?: RequestInit) {
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if (init?.headers) {
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if (init.headers instanceof Headers) {
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init.headers.delete("authorization")
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init.headers.delete("Authorization")
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} else if (Array.isArray(init.headers)) {
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init.headers = init.headers.filter(([key]) => key.toLowerCase() !== "authorization")
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} else {
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delete init.headers["authorization"]
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delete init.headers["Authorization"]
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}
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}
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const currentAuth = await getAuth()
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if (currentAuth.type !== "oauth")
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return websocketFetch ? websocketFetch(requestInput, init) : fetch(requestInput, init)
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const authWithAccount = currentAuth as typeof currentAuth & { accountId?: string }
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|
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if (!currentAuth.access || currentAuth.expires < Date.now()) {
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if (!refreshPromise) {
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log.info("refreshing codex access token")
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refreshPromise = refreshAccessToken(currentAuth.refresh, issuer)
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.then(async (tokens) => {
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const accountId = extractAccountId(tokens) || authWithAccount.accountId
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await input.client.auth.set({
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path: { id: "openai" },
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body: {
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type: "oauth",
|
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refresh: tokens.refresh_token,
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access: tokens.access_token,
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expires: Date.now() + (tokens.expires_in ?? 3600) * 1000,
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...(accountId && { accountId }),
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},
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})
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return {
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access: tokens.access_token,
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accountId,
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}
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})
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.finally(() => {
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refreshPromise = undefined
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})
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}
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const refreshed = await refreshPromise
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currentAuth.access = refreshed.access
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authWithAccount.accountId = refreshed.accountId
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}
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const headers = new Headers()
|
||||
if (init?.headers) {
|
||||
if (init.headers instanceof Headers) {
|
||||
init.headers.forEach((value, key) => headers.set(key, value))
|
||||
} else if (Array.isArray(init.headers)) {
|
||||
for (const [key, value] of init.headers) {
|
||||
if (value !== undefined) headers.set(key, String(value))
|
||||
}
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||||
} else {
|
||||
for (const [key, value] of Object.entries(init.headers)) {
|
||||
if (value !== undefined) headers.set(key, String(value))
|
||||
}
|
||||
}
|
||||
}
|
||||
headers.set("authorization", `Bearer ${currentAuth.access}`)
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||||
if (authWithAccount.accountId) {
|
||||
headers.set("ChatGPT-Account-Id", authWithAccount.accountId)
|
||||
}
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||||
|
||||
const parsed =
|
||||
requestInput instanceof URL
|
||||
? requestInput
|
||||
: new URL(typeof requestInput === "string" ? requestInput : requestInput.url)
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||||
const url =
|
||||
parsed.pathname.includes("/v1/responses") || parsed.pathname.includes("/chat/completions")
|
||||
? new URL(codexApiEndpoint)
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||||
: parsed
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||||
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||||
const requestInit = {
|
||||
...init,
|
||||
headers,
|
||||
}
|
||||
if (websocketFetch && parsed.pathname.includes("/v1/responses")) return websocketFetch(url, requestInit)
|
||||
return fetch(url, OpenAIWebSocketPool.withoutInternalHeaders(requestInit))
|
||||
},
|
||||
}
|
||||
},
|
||||
methods: [
|
||||
{
|
||||
label: "ChatGPT Pro/Plus (browser)",
|
||||
type: "oauth",
|
||||
authorize: async () => {
|
||||
const { redirectUri } = await startOAuthServer()
|
||||
const pkce = await generatePKCE()
|
||||
const state = base64UrlEncode(crypto.getRandomValues(new Uint8Array(32)).buffer)
|
||||
const authUrl = buildAuthorizeUrl(redirectUri, pkce, state)
|
||||
|
||||
const callbackPromise = waitForOAuthCallback(pkce, state)
|
||||
|
||||
return {
|
||||
url: authUrl,
|
||||
instructions: "Complete authorization in your browser. This window will close automatically.",
|
||||
method: "auto" as const,
|
||||
callback: async () => {
|
||||
const tokens = await callbackPromise
|
||||
stopOAuthServer()
|
||||
const accountId = extractAccountId(tokens)
|
||||
return {
|
||||
type: "success" as const,
|
||||
refresh: tokens.refresh_token,
|
||||
access: tokens.access_token,
|
||||
expires: Date.now() + (tokens.expires_in ?? 3600) * 1000,
|
||||
accountId,
|
||||
}
|
||||
},
|
||||
}
|
||||
},
|
||||
},
|
||||
{
|
||||
label: "ChatGPT Pro/Plus (headless)",
|
||||
type: "oauth",
|
||||
authorize: async () => {
|
||||
const deviceResponse = await fetch(`${ISSUER}/api/accounts/deviceauth/usercode`, {
|
||||
method: "POST",
|
||||
headers: {
|
||||
"Content-Type": "application/json",
|
||||
"User-Agent": `opencode/${InstallationVersion}`,
|
||||
},
|
||||
body: JSON.stringify({ client_id: CLIENT_ID }),
|
||||
})
|
||||
|
||||
if (!deviceResponse.ok) throw new Error("Failed to initiate device authorization")
|
||||
|
||||
const deviceData = (await deviceResponse.json()) as {
|
||||
device_auth_id: string
|
||||
user_code: string
|
||||
interval: string
|
||||
}
|
||||
const interval = Math.max(parseInt(deviceData.interval) || 5, 1) * 1000
|
||||
|
||||
return {
|
||||
url: `${ISSUER}/codex/device`,
|
||||
instructions: `Enter code: ${deviceData.user_code}`,
|
||||
method: "auto" as const,
|
||||
async callback() {
|
||||
while (true) {
|
||||
const response = await fetch(`${ISSUER}/api/accounts/deviceauth/token`, {
|
||||
method: "POST",
|
||||
headers: {
|
||||
"Content-Type": "application/json",
|
||||
"User-Agent": `opencode/${InstallationVersion}`,
|
||||
},
|
||||
body: JSON.stringify({
|
||||
device_auth_id: deviceData.device_auth_id,
|
||||
user_code: deviceData.user_code,
|
||||
}),
|
||||
})
|
||||
|
||||
if (response.ok) {
|
||||
const data = (await response.json()) as {
|
||||
authorization_code: string
|
||||
code_verifier: string
|
||||
}
|
||||
|
||||
const tokenResponse = await fetch(`${ISSUER}/oauth/token`, {
|
||||
method: "POST",
|
||||
headers: { "Content-Type": "application/x-www-form-urlencoded" },
|
||||
body: new URLSearchParams({
|
||||
grant_type: "authorization_code",
|
||||
code: data.authorization_code,
|
||||
redirect_uri: `${ISSUER}/deviceauth/callback`,
|
||||
client_id: CLIENT_ID,
|
||||
code_verifier: data.code_verifier,
|
||||
}).toString(),
|
||||
})
|
||||
|
||||
if (!tokenResponse.ok) {
|
||||
throw new Error(`Token exchange failed: ${tokenResponse.status}`)
|
||||
}
|
||||
|
||||
const tokens: TokenResponse = await tokenResponse.json()
|
||||
|
||||
return {
|
||||
type: "success" as const,
|
||||
refresh: tokens.refresh_token,
|
||||
access: tokens.access_token,
|
||||
expires: Date.now() + (tokens.expires_in ?? 3600) * 1000,
|
||||
accountId: extractAccountId(tokens),
|
||||
}
|
||||
}
|
||||
|
||||
if (response.status !== 403 && response.status !== 404) {
|
||||
return { type: "failed" as const }
|
||||
}
|
||||
|
||||
await sleep(interval + OAUTH_POLLING_SAFETY_MARGIN_MS)
|
||||
}
|
||||
},
|
||||
}
|
||||
},
|
||||
},
|
||||
{
|
||||
label: "Manually enter API Key",
|
||||
type: "api",
|
||||
},
|
||||
],
|
||||
},
|
||||
"chat.headers": async (input, output) => {
|
||||
if (input.model.providerID !== "openai") return
|
||||
output.headers.originator = "opencode"
|
||||
output.headers["User-Agent"] = `opencode/${InstallationVersion} (${os.platform()} ${os.release()}; ${os.arch()})`
|
||||
output.headers["session-id"] = input.sessionID
|
||||
// Temporary fetch-layer hack: title generation currently shares the conversation
|
||||
// session ID, so the OpenAI plugin marks it for HTTP fallback until transport
|
||||
// context can be passed directly instead of smuggled through headers.
|
||||
if (websocketFetchInstalled && input.agent === "title") output.headers[OpenAIWebSocketPool.TITLE_HEADER] = "true"
|
||||
},
|
||||
"chat.params": async (input, output) => {
|
||||
if (input.model.providerID !== "openai") return
|
||||
// Match codex cli
|
||||
output.maxOutputTokens = undefined
|
||||
},
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user