293 lines
10 KiB
TypeScript
293 lines
10 KiB
TypeScript
import { createServer } from "node:http"
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import type { IntegrationOAuthMethodRegistration } from "@opencode-ai/plugin/v2/effect/integration"
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import { define } from "@opencode-ai/plugin/v2/effect/plugin"
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import { Deferred, Effect } from "effect"
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import type { Scope } from "effect"
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import { Credential } from "../../credential"
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import { InstallationVersion } from "../../installation/version"
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import { Integration } from "../../integration"
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import { ModelV2 } from "../../model"
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import { OauthCallbackPage } from "../../oauth/page"
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import { ProviderV2 } from "../../provider"
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import type { PluginInternal } from "../internal"
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const clientID = "app_EMoamEEZ73f0CkXaXp7hrann"
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const issuer = "https://auth.openai.com"
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const callbackPort = 1455
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const pollingSafetyMargin = 3000
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const browserMethodID = Integration.MethodID.make("chatgpt-browser")
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const headlessMethodID = Integration.MethodID.make("chatgpt-headless")
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type Pkce = {
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verifier: string
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challenge: string
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}
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type 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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type Claims = {
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chatgpt_account_id?: string
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organizations?: Array<{ id: string }>
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"https://api.openai.com/auth"?: { chatgpt_account_id?: string }
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}
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const browser = {
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integrationID: Integration.ID.make("openai"),
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method: {
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id: browserMethodID,
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type: "oauth",
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label: "ChatGPT Pro/Plus (browser)",
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},
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authorize: () =>
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Effect.gen(function* () {
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const pkce = yield* Effect.promise(generatePKCE)
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const state = base64UrlEncode(crypto.getRandomValues(new Uint8Array(32)).buffer)
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const code = yield* Deferred.make<string, Error>()
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const redirect = `http://localhost:${callbackPort}/auth/callback`
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const server = createServer((request, response) => {
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const url = new URL(request.url ?? "/", `http://localhost:${callbackPort}`)
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if (url.pathname !== "/auth/callback") {
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response.writeHead(404).end("Not found")
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return
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}
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const error = url.searchParams.get("error_description") ?? url.searchParams.get("error")
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const value = url.searchParams.get("code")
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if (error) {
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Effect.runFork(Deferred.fail(code, new Error(error)))
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response
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.writeHead(400, { "Content-Type": "text/html" })
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.end(OauthCallbackPage.error(error, { provider: "ChatGPT" }))
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return
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}
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if (!value || url.searchParams.get("state") !== state) {
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const message = value ? "Invalid OAuth state" : "Missing authorization code"
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Effect.runFork(Deferred.fail(code, new Error(message)))
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response
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.writeHead(400, { "Content-Type": "text/html" })
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.end(OauthCallbackPage.error(message, { provider: "ChatGPT" }))
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return
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}
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Effect.runFork(Deferred.succeed(code, value))
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response.writeHead(200, { "Content-Type": "text/html" }).end(OauthCallbackPage.success({ provider: "ChatGPT" }))
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})
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yield* Effect.callback<void, Error>((resume) => {
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server.once("error", (error) => resume(Effect.fail(error)))
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server.listen(callbackPort, "localhost", () => resume(Effect.void))
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})
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yield* Effect.addFinalizer(() => Effect.sync(() => server.close()))
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return {
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mode: "auto" as const,
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url: authorizeURL(redirect, pkce, state),
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instructions: "Complete authorization in your browser. This window will close automatically.",
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callback: Deferred.await(code).pipe(
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Effect.flatMap((value) => exchange(value, redirect, pkce)),
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Effect.map((tokens) => credential(browserMethodID, tokens)),
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),
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}
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}),
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refresh: (value) => refresh(browserMethodID, value),
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} satisfies IntegrationOAuthMethodRegistration
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const headless = {
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integrationID: Integration.ID.make("openai"),
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method: {
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id: headlessMethodID,
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type: "oauth",
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label: "ChatGPT Pro/Plus (headless)",
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},
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authorize: () =>
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Effect.gen(function* () {
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const device = yield* request<{ device_auth_id: string; user_code: string; interval: string }>(
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`${issuer}/api/accounts/deviceauth/usercode`,
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{
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method: "POST",
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headers: headers("application/json"),
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body: JSON.stringify({ client_id: clientID }),
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},
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)
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const interval = Math.max(Number.parseInt(device.interval) || 5, 1) * 1000
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return {
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mode: "auto" as const,
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url: `${issuer}/codex/device`,
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instructions: `Enter code: ${device.user_code}`,
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callback: Effect.gen(function* () {
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while (true) {
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const response = yield* Effect.tryPromise({
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try: (signal) =>
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fetch(`${issuer}/api/accounts/deviceauth/token`, {
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method: "POST",
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headers: headers("application/json"),
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body: JSON.stringify({ device_auth_id: device.device_auth_id, user_code: device.user_code }),
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signal,
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}),
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catch: (cause) => cause,
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})
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if (response.ok) {
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const data = (yield* Effect.promise(() => response.json())) as {
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authorization_code: string
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code_verifier: string
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}
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return credential(
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headlessMethodID,
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yield* exchange(data.authorization_code, `${issuer}/deviceauth/callback`, {
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verifier: data.code_verifier,
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challenge: "",
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}),
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)
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}
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if (response.status !== 403 && response.status !== 404) {
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return yield* Effect.fail(new Error(`Device authorization failed: ${response.status}`))
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}
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yield* Effect.sleep(interval + pollingSafetyMargin)
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}
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}),
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}
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}),
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refresh: (value) => refresh(headlessMethodID, value),
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} satisfies IntegrationOAuthMethodRegistration
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export const OpenAIPlugin = define({
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id: "openai",
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effect: Effect.fn(function* (ctx) {
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yield* ctx.integration.transform((draft) => {
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draft.method.update(browser)
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draft.method.update(headless)
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})
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yield* ctx.catalog.transform(
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Effect.fn(function* (evt) {
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for (const item of evt.provider.list()) {
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if (item.provider.api.type !== "aisdk") continue
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if (item.provider.api.package !== "@ai-sdk/openai") continue
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if (!item.models.has(ModelV2.ID.make("gpt-5-chat-latest"))) continue
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evt.model.update(item.provider.id, ModelV2.ID.make("gpt-5-chat-latest"), (model) => {
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// OpenAIPlugin sends OpenAI models through Responses; this alias is a
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// chat-completions-only model, so hide it only from OpenAI's catalog.
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model.enabled = false
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})
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}
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}),
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)
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yield* ctx.aisdk.sdk(
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Effect.fn(function* (evt) {
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if (evt.package !== "@ai-sdk/openai") return
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const mod = yield* Effect.promise(() => import("@ai-sdk/openai"))
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evt.sdk = mod.createOpenAI(evt.options)
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}),
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)
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yield* ctx.aisdk.language(
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Effect.fn(function* (evt) {
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if (evt.model.providerID !== ProviderV2.ID.openai) return
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evt.language = evt.sdk.responses(evt.model.api.id)
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}),
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)
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}),
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} satisfies PluginInternal.Plugin<PluginInternal.Requirements | Scope.Scope>)
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function headers(contentType: string) {
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return { "Content-Type": contentType, "User-Agent": `opencode/${InstallationVersion}` }
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}
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function exchange(code: string, redirect: string, pkce: Pkce) {
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return request<TokenResponse>(`${issuer}/oauth/token`, {
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method: "POST",
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headers: headers("application/x-www-form-urlencoded"),
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body: new URLSearchParams({
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grant_type: "authorization_code",
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code,
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redirect_uri: redirect,
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client_id: clientID,
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code_verifier: pkce.verifier,
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}).toString(),
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})
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}
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function refresh(methodID: Integration.MethodID, value: Pick<Credential.OAuth, "refresh" | "metadata">) {
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return request<TokenResponse>(`${issuer}/oauth/token`, {
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method: "POST",
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headers: headers("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: value.refresh,
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client_id: clientID,
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}).toString(),
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}).pipe(
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Effect.map((tokens) => {
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const next = credential(methodID, tokens)
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return Credential.OAuth.make({ ...next, metadata: next.metadata ?? value.metadata })
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}),
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)
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}
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function request<A>(url: string, init: RequestInit) {
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return Effect.tryPromise({
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try: async (signal) => {
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const response = await fetch(url, { ...init, signal })
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if (!response.ok) throw new Error(`Request failed: ${response.status}`)
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return response.json() as Promise<A>
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},
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catch: (cause) => cause,
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})
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}
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function credential(methodID: Integration.MethodID, tokens: TokenResponse) {
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const accountID = extractAccountID(tokens)
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return Credential.OAuth.make({
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type: "oauth",
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methodID,
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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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metadata: accountID ? { accountID } : undefined,
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})
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}
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async function generatePKCE(): Promise<Pkce> {
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const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~"
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const verifier = Array.from(crypto.getRandomValues(new Uint8Array(43)), (byte) => chars[byte % chars.length]).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) {
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return Buffer.from(buffer).toString("base64url")
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}
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function authorizeURL(redirect: string, pkce: Pkce, state: string) {
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return `${issuer}/oauth/authorize?${new URLSearchParams({
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response_type: "code",
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client_id: clientID,
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redirect_uri: redirect,
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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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}
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function extractAccountID(tokens: TokenResponse) {
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return claim(tokens.id_token) ?? claim(tokens.access_token)
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}
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function claim(token: string) {
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const part = token.split(".")[1]
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if (!part) return
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try {
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const claims = JSON.parse(Buffer.from(part, "base64url").toString()) as Claims
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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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} catch {
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return
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}
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}
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