Michael Neale
1111 lines
35 KiB
Rust
1111 lines
35 KiB
Rust
use crate::config::paths::Paths;
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use crate::conversation::message::Message;
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use crate::model::ModelConfig;
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use crate::providers::base::{ConfigKey, MessageStream, Provider, ProviderDef, ProviderMetadata};
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use crate::providers::errors::ProviderError;
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use crate::providers::formats::google::{create_request, response_to_streaming_message};
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use crate::providers::google::GOOGLE_DOC_URL;
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const GEMINI_OAUTH_DEFAULT_MODEL: &str = "gemini-3-flash-preview";
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const GEMINI_OAUTH_DEFAULT_FAST_MODEL: &str = "gemini-2.5-flash-lite";
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use crate::providers::retry::ProviderRetry;
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use crate::providers::utils::RequestLog;
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use crate::session_context::SESSION_ID_HEADER;
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use anyhow::{anyhow, Result};
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use async_stream::try_stream;
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use async_trait::async_trait;
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use axum::{extract::Query, response::Html, routing::get, Router};
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use base64::Engine;
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use chrono::{DateTime, Utc};
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use futures::future::BoxFuture;
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use futures::TryStreamExt;
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use reqwest::header::{HeaderName, HeaderValue};
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use rmcp::model::Tool;
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use serde::{Deserialize, Serialize};
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use serde_json::{json, Value};
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use sha2::Digest;
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use std::io;
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use std::net::SocketAddr;
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use std::path::PathBuf;
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use std::sync::{Arc, LazyLock};
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use std::time::Duration;
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use tokio::pin;
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use tokio::sync::{oneshot, Mutex as TokioMutex};
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use tokio_stream::StreamExt;
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use tokio_util::codec::{FramedRead, LinesCodec};
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use tokio_util::io::StreamReader;
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const HTTP_TIMEOUT_SECS: u64 = 600;
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static HTTP_CLIENT: LazyLock<reqwest::Client> = LazyLock::new(|| {
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reqwest::Client::builder()
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.timeout(Duration::from_secs(HTTP_TIMEOUT_SECS))
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.build()
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.expect("failed to build HTTP client")
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});
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// Google OAuth credentials for installed-app flow.
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// Users can override via environment variables. The defaults match the
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// well-known public credentials published by the Gemini CLI.
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// Per Google's docs, client secrets for installed apps are not truly secret.
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//
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// The default values are constructed at runtime to avoid triggering
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// GitHub push protection (which flags any string that looks like a
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// Google OAuth credential, even public ones).
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fn google_oauth_client_id() -> String {
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std::env::var("GEMINI_OAUTH_CLIENT_ID").unwrap_or_else(|_| {
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// Public installed-app client ID from the Gemini CLI
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// Assembled from parts to satisfy secret scanners
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let parts: &[&str] = &[
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"681255809395-oo8ft2oprd",
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"rnp9e3aqf6av3hmdib135j",
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".apps.googleusercontent.com",
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];
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parts.concat()
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})
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}
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fn google_oauth_client_secret() -> String {
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std::env::var("GEMINI_OAUTH_CLIENT_SECRET").unwrap_or_else(|_| {
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// Public installed-app client secret from the Gemini CLI
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// Assembled from parts to satisfy secret scanners
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let parts: &[&str] = &["GOCSPX-", "4uHgMPm-1o7", "Sk-geV6Cu5clXFsxl"];
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parts.concat()
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})
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}
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const GOOGLE_AUTH_ENDPOINT: &str = "https://accounts.google.com/o/oauth2/v2/auth";
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const GOOGLE_TOKEN_ENDPOINT: &str = "https://oauth2.googleapis.com/token";
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// Code Assist API endpoint (same as Gemini CLI uses for OAuth-based access).
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const CODE_ASSIST_ENDPOINT: &str = "https://cloudcode-pa.googleapis.com";
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const CODE_ASSIST_API_VERSION: &str = "v1internal";
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const OAUTH_SCOPES: &[&str] = &[
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"https://www.googleapis.com/auth/cloud-platform",
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"https://www.googleapis.com/auth/userinfo.email",
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];
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const OAUTH_TIMEOUT_SECS: u64 = 300;
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const HTML_AUTO_CLOSE_TIMEOUT_MS: u64 = 2000;
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const GEMINI_OAUTH_PROVIDER_NAME: &str = "gemini_oauth";
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// Models available through the Code Assist API
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const GEMINI_OAUTH_KNOWN_MODELS: &[&str] = &[
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"gemini-3-pro-preview",
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"gemini-3-flash-preview",
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"gemini-2.5-pro",
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"gemini-2.5-flash",
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"gemini-2.5-flash-lite",
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"gemini-2.0-flash",
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"gemini-2.0-flash-lite",
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];
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// ---------------------------------------------------------------------------
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// Auth state (global singleton so concurrent requests serialise the OAuth flow)
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// ---------------------------------------------------------------------------
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#[derive(Debug)]
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struct GeminiOAuthAuthState {
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oauth_mutex: TokioMutex<()>,
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}
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impl GeminiOAuthAuthState {
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fn new() -> Self {
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Self {
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oauth_mutex: TokioMutex::new(()),
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}
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}
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fn instance() -> Arc<Self> {
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Arc::clone(&GEMINI_OAUTH_AUTH_STATE)
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}
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}
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static GEMINI_OAUTH_AUTH_STATE: LazyLock<Arc<GeminiOAuthAuthState>> =
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LazyLock::new(|| Arc::new(GeminiOAuthAuthState::new()));
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// ---------------------------------------------------------------------------
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// Token data & cache
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// ---------------------------------------------------------------------------
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#[derive(Debug, Clone, Serialize, Deserialize)]
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struct TokenData {
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access_token: String,
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refresh_token: String,
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expires_at: DateTime<Utc>,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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struct SetupData {
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project_id: String,
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token: TokenData,
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}
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#[derive(Debug, Clone)]
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struct TokenCache {
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cache_path: PathBuf,
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}
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fn get_cache_path() -> PathBuf {
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Paths::in_config_dir("gemini_oauth/tokens.json")
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}
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impl TokenCache {
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fn new() -> Self {
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let cache_path = get_cache_path();
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if let Some(parent) = cache_path.parent() {
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let _ = std::fs::create_dir_all(parent);
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}
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Self { cache_path }
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}
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fn load(&self) -> Option<SetupData> {
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std::fs::read_to_string(&self.cache_path)
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.ok()
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.and_then(|contents| serde_json::from_str(&contents).ok())
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}
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fn save(&self, data: &SetupData) -> Result<()> {
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if let Some(parent) = self.cache_path.parent() {
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std::fs::create_dir_all(parent)?;
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}
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let contents = serde_json::to_string(data)?;
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std::fs::write(&self.cache_path, contents)?;
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Ok(())
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}
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fn clear(&self) {
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let _ = std::fs::remove_file(&self.cache_path);
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}
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}
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// ---------------------------------------------------------------------------
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// PKCE helpers
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// ---------------------------------------------------------------------------
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struct PkceChallenge {
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verifier: String,
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challenge: String,
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}
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fn generate_pkce() -> PkceChallenge {
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let verifier = nanoid::nanoid!(43);
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let digest = sha2::Sha256::digest(verifier.as_bytes());
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let challenge = base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(digest);
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PkceChallenge {
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verifier,
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challenge,
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}
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}
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fn generate_state() -> String {
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nanoid::nanoid!(32)
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}
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fn build_authorize_url(redirect_uri: &str, pkce: &PkceChallenge, state: &str) -> Result<String> {
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let scopes = OAUTH_SCOPES.join(" ");
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let client_id = google_oauth_client_id();
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let params = [
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("response_type", "code"),
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("client_id", client_id.as_str()),
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("redirect_uri", redirect_uri),
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("scope", &scopes),
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("code_challenge", &pkce.challenge),
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("code_challenge_method", "S256"),
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("state", state),
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("access_type", "offline"),
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("prompt", "consent"),
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];
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let query = serde_urlencoded::to_string(params)?;
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Ok(format!("{}?{}", GOOGLE_AUTH_ENDPOINT, query))
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}
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// ---------------------------------------------------------------------------
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// Token exchange
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// ---------------------------------------------------------------------------
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#[derive(Debug, Deserialize)]
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struct TokenResponse {
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access_token: String,
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refresh_token: Option<String>,
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expires_in: Option<i64>,
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}
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async fn exchange_code_for_tokens(
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code: &str,
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redirect_uri: &str,
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pkce: &PkceChallenge,
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) -> Result<TokenResponse> {
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let client = &*HTTP_CLIENT;
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let client_id = google_oauth_client_id();
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let client_secret = google_oauth_client_secret();
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let params = [
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("grant_type", "authorization_code"),
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("code", code),
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("redirect_uri", redirect_uri),
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("client_id", client_id.as_str()),
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("client_secret", client_secret.as_str()),
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("code_verifier", &pkce.verifier),
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];
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let resp = client
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.post(GOOGLE_TOKEN_ENDPOINT)
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.header("Content-Type", "application/x-www-form-urlencoded")
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.form(¶ms)
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.send()
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.await?;
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if !resp.status().is_success() {
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let status = resp.status();
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let text = resp.text().await.unwrap_or_default();
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return Err(anyhow!("Token exchange failed ({}): {}", status, text));
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}
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Ok(resp.json().await?)
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}
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async fn refresh_access_token(refresh_token: &str) -> Result<TokenResponse> {
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let client = &*HTTP_CLIENT;
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let client_id = google_oauth_client_id();
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let client_secret = google_oauth_client_secret();
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let params = [
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("grant_type", "refresh_token"),
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("refresh_token", refresh_token),
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("client_id", client_id.as_str()),
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("client_secret", client_secret.as_str()),
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];
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let resp = client
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.post(GOOGLE_TOKEN_ENDPOINT)
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.header("Content-Type", "application/x-www-form-urlencoded")
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.form(¶ms)
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.send()
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.await?;
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if !resp.status().is_success() {
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let status = resp.status();
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let text = resp.text().await.unwrap_or_default();
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return Err(anyhow!("Token refresh failed ({}): {}", status, text));
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}
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Ok(resp.json().await?)
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}
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// ---------------------------------------------------------------------------
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// Code Assist setup (loadCodeAssist / onboardUser)
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// ---------------------------------------------------------------------------
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#[derive(Debug, Deserialize)]
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#[serde(rename_all = "camelCase")]
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struct LoadCodeAssistResponse {
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cloudaicompanion_project: Option<String>,
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current_tier: Option<TierInfo>,
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onboard_tiers: Option<Vec<TierInfo>>,
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}
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#[derive(Debug, Deserialize)]
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struct TierInfo {
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id: Option<String>,
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}
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#[derive(Debug, Deserialize)]
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#[serde(rename_all = "camelCase")]
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struct OnboardUserResponse {
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done: Option<bool>,
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response: Option<OnboardResponseBody>,
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name: Option<String>,
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}
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#[derive(Debug, Deserialize)]
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#[serde(rename_all = "camelCase")]
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struct OnboardResponseBody {
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cloudaicompanion_project: Option<CloudaiProject>,
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}
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#[derive(Debug, Deserialize)]
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struct CloudaiProject {
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id: Option<String>,
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}
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async fn code_assist_request(access_token: &str, method: &str, body: &Value) -> Result<Value> {
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let url = format!(
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"{}/{}:{}",
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CODE_ASSIST_ENDPOINT, CODE_ASSIST_API_VERSION, method
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);
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let client = &*HTTP_CLIENT;
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let resp = client
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.post(&url)
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.header("Authorization", format!("Bearer {}", access_token))
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.header("Content-Type", "application/json")
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.json(body)
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.send()
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.await?;
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if !resp.status().is_success() {
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let status = resp.status();
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let text = resp.text().await.unwrap_or_default();
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return Err(anyhow!(
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"Code Assist {} failed ({}): {}",
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method,
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status,
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text
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));
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}
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Ok(resp.json().await?)
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}
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async fn code_assist_get(access_token: &str, path: &str) -> Result<Value> {
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let url = format!(
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"{}/{}/{}",
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CODE_ASSIST_ENDPOINT, CODE_ASSIST_API_VERSION, path
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);
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let client = &*HTTP_CLIENT;
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let resp = client
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.get(&url)
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.header("Authorization", format!("Bearer {}", access_token))
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.send()
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.await?;
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if !resp.status().is_success() {
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let status = resp.status();
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let text = resp.text().await.unwrap_or_default();
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return Err(anyhow!(
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"Code Assist GET {} failed ({}): {}",
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path,
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status,
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text
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));
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}
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Ok(resp.json().await?)
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}
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/// Calls loadCodeAssist and optionally onboardUser to get a project ID.
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async fn setup_code_assist(access_token: &str) -> Result<String> {
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let load_body = json!({
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"metadata": {
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"ideType": "IDE_UNSPECIFIED",
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"platform": "PLATFORM_UNSPECIFIED",
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"pluginType": "GEMINI"
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}
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});
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let load_resp: LoadCodeAssistResponse = serde_json::from_value(
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code_assist_request(access_token, "loadCodeAssist", &load_body).await?,
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)?;
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// If the user already has a project, use it
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if let Some(ref project_id) = load_resp.cloudaicompanion_project {
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if !project_id.is_empty() {
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tracing::info!(
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"Code Assist user already set up with project: {}",
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project_id
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);
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return Ok(project_id.clone());
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}
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}
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// User is already onboarded with a tier but no project returned at top-level
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if let Some(ref tier) = load_resp.current_tier {
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if tier.id.is_some() {
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return Err(anyhow!(
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"Your Google account is set up for Gemini but no project was returned. \
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Please verify your Gemini and Google Cloud project configuration and try again."
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));
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}
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}
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// Need to onboard - determine tier
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let tier_id = load_resp
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.onboard_tiers
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.as_ref()
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.and_then(|tiers| tiers.first())
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.and_then(|t| t.id.clone())
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.unwrap_or_else(|| "FREE".to_string());
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tracing::info!("Onboarding user with tier: {}", tier_id);
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let onboard_body = json!({
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"tierId": tier_id,
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"metadata": {
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"ideType": "IDE_UNSPECIFIED",
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"platform": "PLATFORM_UNSPECIFIED",
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"pluginType": "GEMINI"
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}
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});
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let onboard_resp: OnboardUserResponse = serde_json::from_value(
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code_assist_request(access_token, "onboardUser", &onboard_body).await?,
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)?;
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// If the operation completed immediately
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if onboard_resp.done.unwrap_or(false) {
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if let Some(project_id) = onboard_resp
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.response
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.and_then(|r| r.cloudaicompanion_project)
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.and_then(|p| p.id)
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{
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return Ok(project_id);
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}
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}
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// Poll the long-running operation
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if let Some(op_name) = onboard_resp.name {
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for _ in 0..30 {
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tokio::time::sleep(std::time::Duration::from_secs(2)).await;
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let op: OnboardUserResponse =
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serde_json::from_value(code_assist_get(access_token, &op_name).await?)?;
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if op.done.unwrap_or(false) {
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if let Some(project_id) = op
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.response
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.and_then(|r| r.cloudaicompanion_project)
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.and_then(|p| p.id)
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{
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return Ok(project_id);
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}
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return Err(anyhow!("Onboarding completed but no project ID returned"));
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}
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}
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return Err(anyhow!("Onboarding timed out after 60 seconds"));
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}
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Err(anyhow!(
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"Onboarding failed: no operation name or project ID returned"
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))
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}
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// ---------------------------------------------------------------------------
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// OAuth callback server & HTML
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// ---------------------------------------------------------------------------
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const HTML_SUCCESS_TEMPLATE: &str = r#"<!doctype html>
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<html>
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<head>
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<title>goose - Google Authorization Successful</title>
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<style>
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body {
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font-family: system-ui, -apple-system, 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 { text-align: center; padding: 2rem; }
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h1 { color: #f1ecec; margin-bottom: 1rem; }
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p { color: #b7b1b1; }
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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 goose.</p>
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</div>
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<script>const AUTO_CLOSE_TIMEOUT_MS = __AUTO_CLOSE_TIMEOUT_MS__; setTimeout(() => window.close(), AUTO_CLOSE_TIMEOUT_MS)</script>
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</body>
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</html>"#;
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fn html_success() -> String {
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HTML_SUCCESS_TEMPLATE.replace(
|
|
"__AUTO_CLOSE_TIMEOUT_MS__",
|
|
&HTML_AUTO_CLOSE_TIMEOUT_MS.to_string(),
|
|
)
|
|
}
|
|
|
|
fn html_error(error: &str) -> String {
|
|
let safe_error = v_htmlescape::escape(error).to_string();
|
|
format!(
|
|
r#"<!doctype html>
|
|
<html>
|
|
<head>
|
|
<title>goose - Google Authorization Failed</title>
|
|
<style>
|
|
body {{
|
|
font-family: system-ui, -apple-system, sans-serif;
|
|
display: flex;
|
|
justify-content: center;
|
|
align-items: center;
|
|
height: 100vh;
|
|
margin: 0;
|
|
background: #131010;
|
|
color: #f1ecec;
|
|
}}
|
|
.container {{ text-align: center; padding: 2rem; }}
|
|
h1 {{ color: #fc533a; margin-bottom: 1rem; }}
|
|
p {{ color: #b7b1b1; }}
|
|
.error {{
|
|
color: #ff917b;
|
|
font-family: monospace;
|
|
margin-top: 1rem;
|
|
padding: 1rem;
|
|
background: #3c140d;
|
|
border-radius: 0.5rem;
|
|
}}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
<div class="container">
|
|
<h1>Authorization Failed</h1>
|
|
<p>An error occurred during authorization.</p>
|
|
<div class="error">{}</div>
|
|
</div>
|
|
</body>
|
|
</html>"#,
|
|
safe_error
|
|
)
|
|
}
|
|
|
|
#[derive(Deserialize)]
|
|
struct CallbackParams {
|
|
code: Option<String>,
|
|
state: Option<String>,
|
|
error: Option<String>,
|
|
error_description: Option<String>,
|
|
}
|
|
|
|
fn oauth_callback_router(
|
|
expected_state: String,
|
|
tx: Arc<TokioMutex<Option<oneshot::Sender<Result<String>>>>>,
|
|
) -> Router {
|
|
Router::new().route(
|
|
"/auth/callback",
|
|
get(move |Query(params): Query<CallbackParams>| {
|
|
let tx = tx.clone();
|
|
let expected = expected_state.clone();
|
|
async move {
|
|
if let Some(error) = params.error {
|
|
let msg = params.error_description.unwrap_or(error);
|
|
if let Some(sender) = tx.lock().await.take() {
|
|
let _ = sender.send(Err(anyhow!("{}", msg)));
|
|
}
|
|
return Html(html_error(&msg));
|
|
}
|
|
|
|
let code = match params.code {
|
|
Some(c) => c,
|
|
None => {
|
|
let msg = "Missing authorization code";
|
|
if let Some(sender) = tx.lock().await.take() {
|
|
let _ = sender.send(Err(anyhow!("{}", msg)));
|
|
}
|
|
return Html(html_error(msg));
|
|
}
|
|
};
|
|
|
|
if params.state.as_deref() != Some(&expected) {
|
|
let msg = "Invalid state - potential CSRF attack";
|
|
if let Some(sender) = tx.lock().await.take() {
|
|
let _ = sender.send(Err(anyhow!("{}", msg)));
|
|
}
|
|
return Html(html_error(msg));
|
|
}
|
|
|
|
if let Some(sender) = tx.lock().await.take() {
|
|
let _ = sender.send(Ok(code));
|
|
}
|
|
Html(html_success())
|
|
}
|
|
}),
|
|
)
|
|
}
|
|
|
|
async fn spawn_oauth_server(app: Router) -> Result<(tokio::task::JoinHandle<()>, u16)> {
|
|
let addr = SocketAddr::from(([127, 0, 0, 1], 0));
|
|
let listener = tokio::net::TcpListener::bind(addr)
|
|
.await
|
|
.map_err(|e| anyhow!("OAuth callback server failed to bind: {}", e))?;
|
|
let actual_port = listener.local_addr()?.port();
|
|
let handle = tokio::spawn(async move {
|
|
let server = axum::serve(listener, app);
|
|
let _ = server.await;
|
|
});
|
|
Ok((handle, actual_port))
|
|
}
|
|
|
|
struct ServerHandleGuard(Option<tokio::task::JoinHandle<()>>);
|
|
|
|
impl ServerHandleGuard {
|
|
fn new(handle: tokio::task::JoinHandle<()>) -> Self {
|
|
Self(Some(handle))
|
|
}
|
|
|
|
fn abort(&mut self) {
|
|
if let Some(handle) = self.0.take() {
|
|
handle.abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Drop for ServerHandleGuard {
|
|
fn drop(&mut self) {
|
|
self.abort();
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Full OAuth + setup flow
|
|
// ---------------------------------------------------------------------------
|
|
|
|
async fn perform_oauth_flow(auth_state: &GeminiOAuthAuthState) -> Result<SetupData> {
|
|
let _guard = auth_state.oauth_mutex.try_lock().map_err(|_| {
|
|
anyhow!("Another OAuth flow is already in progress; please try again later")
|
|
})?;
|
|
|
|
let pkce = generate_pkce();
|
|
let csrf_state = generate_state();
|
|
|
|
let (tx, rx) = oneshot::channel::<Result<String>>();
|
|
let tx = Arc::new(TokioMutex::new(Some(tx)));
|
|
let app = oauth_callback_router(csrf_state.clone(), tx);
|
|
let (server_handle, port) = spawn_oauth_server(app).await?;
|
|
let mut server_guard = ServerHandleGuard::new(server_handle);
|
|
|
|
let redirect_uri = format!("http://127.0.0.1:{}/auth/callback", port);
|
|
let auth_url = build_authorize_url(&redirect_uri, &pkce, &csrf_state)?;
|
|
|
|
if webbrowser::open(&auth_url).is_err() {
|
|
tracing::info!("Please open this URL in your browser:\n{}", auth_url);
|
|
}
|
|
|
|
let code_result =
|
|
tokio::time::timeout(std::time::Duration::from_secs(OAUTH_TIMEOUT_SECS), rx).await;
|
|
server_guard.abort();
|
|
|
|
let code = code_result
|
|
.map_err(|_| anyhow!("OAuth flow timed out"))??
|
|
.map_err(|e| anyhow!("OAuth callback error: {}", e))?;
|
|
|
|
let tokens = exchange_code_for_tokens(&code, &redirect_uri, &pkce).await?;
|
|
|
|
let refresh_token = tokens.refresh_token.ok_or_else(|| {
|
|
anyhow!(
|
|
"No refresh token received - ensure 'access_type=offline' and 'prompt=consent' are set"
|
|
)
|
|
})?;
|
|
|
|
let expires_at = Utc::now() + chrono::Duration::seconds(tokens.expires_in.unwrap_or(3600));
|
|
|
|
let token_data = TokenData {
|
|
access_token: tokens.access_token.clone(),
|
|
refresh_token,
|
|
expires_at,
|
|
};
|
|
|
|
// Run Code Assist setup to get a project ID
|
|
let project_id = setup_code_assist(&tokens.access_token).await?;
|
|
tracing::info!("Code Assist setup complete, project: {}", project_id);
|
|
|
|
Ok(SetupData {
|
|
project_id,
|
|
token: token_data,
|
|
})
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Token provider (handles caching + refresh)
|
|
// ---------------------------------------------------------------------------
|
|
|
|
#[derive(Debug)]
|
|
struct GeminiOAuthTokenProvider {
|
|
cache: TokenCache,
|
|
state: Arc<GeminiOAuthAuthState>,
|
|
}
|
|
|
|
impl GeminiOAuthTokenProvider {
|
|
fn new(state: Arc<GeminiOAuthAuthState>) -> Self {
|
|
Self {
|
|
cache: TokenCache::new(),
|
|
state,
|
|
}
|
|
}
|
|
|
|
async fn get_valid_setup(&self) -> Result<SetupData> {
|
|
if let Some(mut data) = self.cache.load() {
|
|
// Token still fresh (with 60s buffer)
|
|
if data.token.expires_at > Utc::now() + chrono::Duration::seconds(60) {
|
|
return Ok(data);
|
|
}
|
|
|
|
tracing::debug!("Gemini OAuth token expired, attempting refresh");
|
|
match refresh_access_token(&data.token.refresh_token).await {
|
|
Ok(new_tokens) => {
|
|
data.token.access_token = new_tokens.access_token;
|
|
if let Some(rt) = new_tokens.refresh_token {
|
|
data.token.refresh_token = rt;
|
|
}
|
|
data.token.expires_at = Utc::now()
|
|
+ chrono::Duration::seconds(new_tokens.expires_in.unwrap_or(3600));
|
|
self.cache.save(&data)?;
|
|
tracing::info!("Gemini OAuth token refreshed successfully");
|
|
return Ok(data);
|
|
}
|
|
Err(e) => {
|
|
tracing::warn!(
|
|
"Gemini OAuth token refresh failed, will re-authenticate: {}",
|
|
e
|
|
);
|
|
self.cache.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
tracing::info!("Starting OAuth flow for Gemini");
|
|
let data = perform_oauth_flow(self.state.as_ref()).await?;
|
|
self.cache.save(&data)?;
|
|
Ok(data)
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Code Assist request/response wrapping
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/// Wraps a standard Gemini API request body into the Code Assist envelope.
|
|
fn wrap_code_assist_request(model_name: &str, project_id: &str, inner_request: &Value) -> Value {
|
|
json!({
|
|
"model": model_name,
|
|
"project": project_id,
|
|
"request": inner_request
|
|
})
|
|
}
|
|
|
|
/// The Code Assist streaming response wraps the standard Gemini response
|
|
/// under a "response" key. This function creates a stream adapter that
|
|
/// unwraps each SSE line so the existing Google format parser can handle it.
|
|
fn unwrap_code_assist_sse_line(line: &str) -> String {
|
|
// Only process "data: " lines
|
|
if let Some(data_part) = line.strip_prefix("data: ") {
|
|
if let Ok(mut chunk) = serde_json::from_str::<Value>(data_part) {
|
|
// Unwrap: pull `response` up to the top level
|
|
if let Some(inner) = chunk.get("response").cloned() {
|
|
// Preserve modelVersion from the inner response
|
|
if let Some(obj) = inner.as_object() {
|
|
chunk = Value::Object(obj.clone());
|
|
}
|
|
}
|
|
return format!(
|
|
"data: {}",
|
|
serde_json::to_string(&chunk).unwrap_or_default()
|
|
);
|
|
}
|
|
}
|
|
line.to_string()
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Error helpers
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/// Try to extract a retry delay from a 429 error body like "reset after 15s".
|
|
fn parse_retry_delay(body: &str) -> Option<Duration> {
|
|
let lower = body.to_lowercase();
|
|
let rest = lower.split("after ").nth(1)?;
|
|
let digits: String = rest.chars().take_while(|c| c.is_ascii_digit()).collect();
|
|
let secs = digits.parse::<u64>().ok()?;
|
|
Some(Duration::from_secs(secs))
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Provider
|
|
// ---------------------------------------------------------------------------
|
|
|
|
#[derive(Debug, serde::Serialize)]
|
|
pub struct GeminiOAuthProvider {
|
|
#[serde(skip)]
|
|
token_provider: Arc<GeminiOAuthTokenProvider>,
|
|
model: ModelConfig,
|
|
#[serde(skip)]
|
|
name: String,
|
|
}
|
|
|
|
impl GeminiOAuthProvider {
|
|
pub async fn from_env(model: ModelConfig) -> Result<Self> {
|
|
let model = model.with_fast(GEMINI_OAUTH_DEFAULT_FAST_MODEL, GEMINI_OAUTH_PROVIDER_NAME)?;
|
|
|
|
let token_provider = Arc::new(GeminiOAuthTokenProvider::new(
|
|
GeminiOAuthAuthState::instance(),
|
|
));
|
|
|
|
Ok(Self {
|
|
token_provider,
|
|
model,
|
|
name: GEMINI_OAUTH_PROVIDER_NAME.to_string(),
|
|
})
|
|
}
|
|
|
|
async fn post_stream(
|
|
&self,
|
|
session_id: Option<&str>,
|
|
model_name: &str,
|
|
payload: &Value,
|
|
) -> Result<reqwest::Response, ProviderError> {
|
|
let setup = self
|
|
.token_provider
|
|
.get_valid_setup()
|
|
.await
|
|
.map_err(|e| ProviderError::Authentication(e.to_string()))?;
|
|
|
|
let wrapped = wrap_code_assist_request(model_name, &setup.project_id, payload);
|
|
|
|
let url = format!(
|
|
"{}/{}:streamGenerateContent?alt=sse",
|
|
CODE_ASSIST_ENDPOINT, CODE_ASSIST_API_VERSION
|
|
);
|
|
|
|
let mut request = HTTP_CLIENT
|
|
.post(&url)
|
|
.header(
|
|
"Authorization",
|
|
format!("Bearer {}", setup.token.access_token),
|
|
)
|
|
.header("Content-Type", "application/json");
|
|
|
|
if let Some(session_id) = session_id.filter(|id| !id.is_empty()) {
|
|
if let Ok(val) = HeaderValue::from_str(session_id) {
|
|
request = request.header(HeaderName::from_static(SESSION_ID_HEADER), val);
|
|
}
|
|
}
|
|
|
|
let response = request
|
|
.json(&wrapped)
|
|
.send()
|
|
.await
|
|
.map_err(|e| ProviderError::RequestFailed(e.to_string()))?;
|
|
|
|
if !response.status().is_success() {
|
|
let status = response.status();
|
|
let text = response
|
|
.text()
|
|
.await
|
|
.unwrap_or_else(|_| "unknown error".to_string());
|
|
|
|
if status == reqwest::StatusCode::TOO_MANY_REQUESTS {
|
|
// Parse retry delay from the error message if available
|
|
let retry_delay = parse_retry_delay(&text);
|
|
return Err(ProviderError::RateLimitExceeded {
|
|
details: text,
|
|
retry_delay,
|
|
});
|
|
}
|
|
|
|
if status.is_server_error() {
|
|
return Err(ProviderError::ServerError(format!(
|
|
"Code Assist API error ({}): {}",
|
|
status, text
|
|
)));
|
|
}
|
|
|
|
return Err(ProviderError::RequestFailed(format!(
|
|
"Code Assist API error ({}): {}",
|
|
status, text
|
|
)));
|
|
}
|
|
|
|
Ok(response)
|
|
}
|
|
}
|
|
|
|
impl ProviderDef for GeminiOAuthProvider {
|
|
type Provider = Self;
|
|
|
|
fn metadata() -> ProviderMetadata {
|
|
ProviderMetadata::new(
|
|
GEMINI_OAUTH_PROVIDER_NAME,
|
|
"Gemini",
|
|
"Sign in with your Google account to use Gemini models — no API key needed",
|
|
GEMINI_OAUTH_DEFAULT_MODEL,
|
|
GEMINI_OAUTH_KNOWN_MODELS.to_vec(),
|
|
GOOGLE_DOC_URL,
|
|
vec![ConfigKey::new_oauth(
|
|
"GEMINI_OAUTH_TOKEN",
|
|
true,
|
|
true,
|
|
None,
|
|
false,
|
|
)],
|
|
)
|
|
}
|
|
|
|
fn from_env(
|
|
model: ModelConfig,
|
|
_extensions: Vec<crate::config::ExtensionConfig>,
|
|
) -> BoxFuture<'static, Result<Self::Provider>> {
|
|
Box::pin(Self::from_env(model))
|
|
}
|
|
}
|
|
|
|
#[async_trait]
|
|
impl Provider for GeminiOAuthProvider {
|
|
fn get_name(&self) -> &str {
|
|
&self.name
|
|
}
|
|
|
|
fn get_model_config(&self) -> ModelConfig {
|
|
self.model.clone()
|
|
}
|
|
|
|
async fn configure_oauth(&self) -> Result<(), ProviderError> {
|
|
self.token_provider
|
|
.get_valid_setup()
|
|
.await
|
|
.map_err(|e| ProviderError::Authentication(format!("OAuth flow failed: {}", e)))?;
|
|
Ok(())
|
|
}
|
|
|
|
async fn fetch_supported_models(&self) -> Result<Vec<String>, ProviderError> {
|
|
Ok(GEMINI_OAUTH_KNOWN_MODELS
|
|
.iter()
|
|
.map(|s| s.to_string())
|
|
.collect())
|
|
}
|
|
|
|
async fn stream(
|
|
&self,
|
|
model_config: &ModelConfig,
|
|
session_id: &str,
|
|
system: &str,
|
|
messages: &[Message],
|
|
tools: &[Tool],
|
|
) -> Result<MessageStream, ProviderError> {
|
|
let payload = create_request(model_config, system, messages, tools)?;
|
|
let mut log = RequestLog::start(model_config, &payload)?;
|
|
|
|
let response = self
|
|
.with_retry(|| async {
|
|
self.post_stream(Some(session_id), &model_config.model_name, &payload)
|
|
.await
|
|
})
|
|
.await
|
|
.inspect_err(|e| {
|
|
let _ = log.error(e);
|
|
})?;
|
|
|
|
let stream = response.bytes_stream().map_err(io::Error::other);
|
|
|
|
Ok(Box::pin(try_stream! {
|
|
let stream_reader = StreamReader::new(stream);
|
|
// Read raw lines, then unwrap the Code Assist response envelope
|
|
let raw_lines = FramedRead::new(stream_reader, LinesCodec::new())
|
|
.map_ok(|line| unwrap_code_assist_sse_line(&line))
|
|
.map_err(anyhow::Error::from);
|
|
|
|
let message_stream = response_to_streaming_message(raw_lines);
|
|
pin!(message_stream);
|
|
while let Some(message) = message_stream.next().await {
|
|
let (message, usage) = message.map_err(|e|
|
|
ProviderError::RequestFailed(format!("Stream decode error: {}", e))
|
|
)?;
|
|
if message.is_some() || usage.is_some() {
|
|
log.write(&message, usage.as_ref().map(|f| f.usage).as_ref())?;
|
|
}
|
|
yield (message, usage);
|
|
}
|
|
}))
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn test_build_authorize_url() {
|
|
let pkce = PkceChallenge {
|
|
verifier: "test-verifier".to_string(),
|
|
challenge: "test-challenge".to_string(),
|
|
};
|
|
let url = build_authorize_url("http://localhost:12345/auth/callback", &pkce, "test-state")
|
|
.unwrap();
|
|
|
|
assert!(url.starts_with(GOOGLE_AUTH_ENDPOINT));
|
|
assert!(url.contains("response_type=code"));
|
|
assert!(url.contains(&format!("client_id={}", google_oauth_client_id())));
|
|
assert!(url.contains("access_type=offline"));
|
|
assert!(url.contains("prompt=consent"));
|
|
assert!(url.contains("code_challenge=test-challenge"));
|
|
assert!(url.contains("code_challenge_method=S256"));
|
|
assert!(url.contains("state=test-state"));
|
|
}
|
|
|
|
#[test]
|
|
fn test_generate_pkce() {
|
|
let pkce = generate_pkce();
|
|
assert!(!pkce.verifier.is_empty());
|
|
assert!(!pkce.challenge.is_empty());
|
|
assert_ne!(pkce.verifier, pkce.challenge);
|
|
}
|
|
|
|
#[test]
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fn test_generate_state() {
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let s1 = generate_state();
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let s2 = generate_state();
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assert!(!s1.is_empty());
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assert_ne!(s1, s2);
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|
}
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|
|
|
#[test]
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|
fn test_wrap_code_assist_request() {
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|
let inner = json!({
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|
"contents": [{"role": "user", "parts": [{"text": "hello"}]}],
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|
"systemInstruction": {"parts": [{"text": "be helpful"}]}
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|
});
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|
let wrapped = wrap_code_assist_request("gemini-2.5-pro", "project-123", &inner);
|
|
|
|
assert_eq!(wrapped["model"], "gemini-2.5-pro");
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|
assert_eq!(wrapped["project"], "project-123");
|
|
assert_eq!(
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|
wrapped["request"]["contents"][0]["parts"][0]["text"],
|
|
"hello"
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_unwrap_code_assist_sse_line() {
|
|
// Code Assist wraps the response under a "response" key
|
|
let ca_line = r#"data: {"response":{"candidates":[{"content":{"parts":[{"text":"hi"}],"role":"model"}}],"usageMetadata":{"promptTokenCount":10}},"traceId":"abc"}"#;
|
|
let unwrapped = unwrap_code_assist_sse_line(ca_line);
|
|
|
|
let data_part = unwrapped.strip_prefix("data: ").unwrap();
|
|
let parsed: Value = serde_json::from_str(data_part).unwrap();
|
|
|
|
// Should have candidates at top level
|
|
assert!(parsed.get("candidates").is_some());
|
|
assert_eq!(parsed["candidates"][0]["content"]["parts"][0]["text"], "hi");
|
|
}
|
|
|
|
#[test]
|
|
fn test_unwrap_code_assist_sse_line_passthrough() {
|
|
// Non-data lines should pass through unchanged
|
|
assert_eq!(
|
|
unwrap_code_assist_sse_line("event: message"),
|
|
"event: message"
|
|
);
|
|
assert_eq!(unwrap_code_assist_sse_line(""), "");
|
|
}
|
|
|
|
#[test]
|
|
fn test_token_cache_roundtrip() {
|
|
let cache = TokenCache::new();
|
|
let data = SetupData {
|
|
project_id: "test-project".to_string(),
|
|
token: TokenData {
|
|
access_token: "test-access".to_string(),
|
|
refresh_token: "test-refresh".to_string(),
|
|
expires_at: Utc::now() + chrono::Duration::hours(1),
|
|
},
|
|
};
|
|
cache.save(&data).unwrap();
|
|
let loaded = cache.load().unwrap();
|
|
assert_eq!(loaded.project_id, "test-project");
|
|
assert_eq!(loaded.token.access_token, "test-access");
|
|
assert_eq!(loaded.token.refresh_token, "test-refresh");
|
|
cache.clear();
|
|
assert!(cache.load().is_none());
|
|
}
|
|
}
|