Unlucky Launcher v0.0.1-alpha
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Rust 原生单文件 Minecraft 启动器:CLI 完整可用(install/launch/accounts/java/diagnose/agent), MCP server 接入外部 Agent 工具,GUI 开发中。
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//! device-code 流:发起(拿 `user_code` + `verification_uri`)→ 轮询换 token →(刷新同构)。
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//!
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//! 逐条承 `analyse/04` §4.3 / §4.4 / §4.5:
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//! - **硬超时**:只等 `min(expires_in, 900s)`,防止后台任务永久挂起;
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//! - **`slow_down` 是流程内状态**,不是失败:轮询间隔 +5 秒继续;
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//! - **每次轮询前先 sleep**(别密集打服务端);
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//! - **refresh 同时返回新 refresh_token**,调用方必须整体覆盖(轮换);
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//! - 收紧 HMCL 的观察项 1:**只要 `error` 非空就失败**,不再「描述为空就静默放行」。
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//!
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//! 打印 `user_code`/URL 不在这里:core 不做 UI,宿主拿 [`DeviceCodePrompt`] 自己决定
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//! (CLI 打到 stderr,GUI 弹对话框 + 二维码)。
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use std::time::{Duration, Instant};
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use reqwest::Client;
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use crate::auth::error::{AuthError, AuthResult};
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use crate::auth::secret::Secret;
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use super::endpoints::MicrosoftEndpoints;
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use crate::auth::http::{post_form, Reply};
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/// 申请的 scope(`XboxLive.signin` + 长期刷新)。
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pub const SCOPE: &str = "XboxLive.signin offline_access";
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/// 设备码流程的硬上限:无论服务端给多长,最多等这么久。
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pub const DEVICE_CODE_MAX_WAIT: Duration = Duration::from_secs(900);
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/// 默认轮询间隔下限(服务端 `interval` 更小时按下限走)。
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pub const DEFAULT_MIN_INTERVAL: Duration = Duration::from_secs(1);
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/// `slow_down` 的退避步长(承 HMCL:+5 秒)。
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pub const DEFAULT_SLOW_DOWN_STEP: Duration = Duration::from_secs(5);
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/// device_code grant 类型。
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pub const DEVICE_CODE_GRANT: &str = "urn:ietf:params:oauth:grant-type:device_code";
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/// 轮询策略(生产用 [`PollPolicy::default`],测试用小间隔跑同一套状态机)。
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub struct PollPolicy {
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/// 轮询间隔下限。
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pub min_interval: Duration,
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/// `slow_down` 的退避步长。
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pub slow_down_step: Duration,
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/// 整个流程最多等多久(还会与 `expires_in` 取小)。
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pub max_wait: Duration,
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}
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impl Default for PollPolicy {
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fn default() -> Self {
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Self {
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min_interval: DEFAULT_MIN_INTERVAL,
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slow_down_step: DEFAULT_SLOW_DOWN_STEP,
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max_wait: DEVICE_CODE_MAX_WAIT,
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}
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}
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}
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/// 要展示给用户的信息(URL + 用户码)。
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct DeviceCodePrompt {
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/// 用户在验证页输入的短码(如 `ABCD1234`)。**不是凭据**,可打印。
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pub user_code: String,
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/// 验证地址(`https://www.microsoft.com/link` 等)。
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pub verification_uri: String,
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/// 服务端给的有效期。
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pub expires_in: Duration,
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/// 服务端建议的轮询间隔。
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pub interval: Duration,
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}
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impl DeviceCodePrompt {
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/// 人读两行(CLI 打到 stderr,GUI 直接展示)。
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#[must_use]
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pub fn lines(&self) -> (String, String) {
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(
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format!("请在任意设备打开 {} 并输入代码:", self.verification_uri),
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format!(
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"用户码 {}({} 分钟内有效)",
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self.user_code,
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self.expires_in.as_secs() / 60
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),
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)
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}
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}
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/// 设备码申请的中间态(`device_code` 是凭据形状,不进日志)。
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#[derive(Debug, Clone)]
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pub(crate) struct DeviceCodeGrant {
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/// 展示信息。
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pub prompt: DeviceCodePrompt,
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/// 轮询用的长码(脱敏 Debug,永不打印)。
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pub device_code: Secret,
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}
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/// OAuth 换到的 token 对。
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#[derive(Debug, Clone)]
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pub(crate) struct OAuthTokens {
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/// Live access token(只在链内用,不落盘)。
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pub access_token: Secret,
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/// Live refresh token(落盘、轮换)。
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pub refresh_token: Secret,
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}
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/// 申请设备码。
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pub(crate) async fn request_device_code(
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client: &Client,
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endpoints: &MicrosoftEndpoints,
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client_id: &str,
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) -> AuthResult<DeviceCodeGrant> {
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let reply = post_form(
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client,
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&endpoints.device_code,
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vec![
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("client_id", client_id.to_string()),
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("scope", SCOPE.to_string()),
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],
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)
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.await?;
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if !reply.is_success() {
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return Err(oauth_error(&reply, &endpoints.device_code));
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}
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let user_code = reply
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.text("user_code")
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.ok_or_else(|| AuthError::Malformed("设备码响应缺 user_code".to_string()))?;
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let device_code = reply
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.text("device_code")
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.ok_or_else(|| AuthError::Malformed("设备码响应缺 device_code".to_string()))?;
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let verification_uri = reply
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.text("verification_uri")
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.or_else(|| reply.text("verification_url"))
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.ok_or_else(|| AuthError::Malformed("设备码响应缺 verification_uri".to_string()))?;
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let expires_in = reply.number("expires_in").unwrap_or(900).max(1);
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// 服务端间隔原样收下,下限交给 [`PollPolicy::min_interval`](生产 1 秒,测试可压到毫秒)。
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let interval = reply.number("interval").unwrap_or(5);
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Ok(DeviceCodeGrant {
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prompt: DeviceCodePrompt {
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user_code: user_code.to_string(),
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verification_uri: verification_uri.to_string(),
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expires_in: Duration::from_secs(expires_in),
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interval: Duration::from_secs(interval),
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},
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device_code: Secret::new(device_code),
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})
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}
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/// 轮询直到用户完成授权(或超时/被拒/取消)。
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pub(crate) async fn poll_device_token(
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client: &Client,
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endpoints: &MicrosoftEndpoints,
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client_id: &str,
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grant: &DeviceCodeGrant,
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policy: PollPolicy,
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) -> AuthResult<OAuthTokens> {
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let limit = grant.prompt.expires_in.min(policy.max_wait);
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let mut interval = grant.prompt.interval.max(policy.min_interval);
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let started = Instant::now();
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loop {
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if started.elapsed() >= limit {
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return Err(AuthError::Timeout {
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what: format!("等待设备码授权(上限 {} 秒)", limit.as_secs()),
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});
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}
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tokio::time::sleep(interval).await;
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let reply = post_form(
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client,
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&endpoints.token,
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vec![
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("client_id", client_id.to_string()),
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("grant_type", DEVICE_CODE_GRANT.to_string()),
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("code", grant.device_code.expose().to_string()),
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],
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)
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.await?;
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if let Some(error) = reply.text("error") {
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match error {
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"authorization_pending" => continue,
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// 服务端压力反馈:不是失败,退避后继续(承 HMCL)。
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"slow_down" => {
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interval += policy.slow_down_step;
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continue;
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}
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"expired_token" => {
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return Err(AuthError::Timeout {
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what: "设备码已过期(需重新发起登录)".to_string(),
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})
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}
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"access_denied" | "authorization_declined" => return Err(AuthError::Canceled),
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_ => return Err(oauth_error(&reply, &endpoints.token)),
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}
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}
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return tokens_from(&reply, &endpoints.token);
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}
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}
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/// 用 refresh_token 换新的 token 对(**刷新也会返回新 refresh_token**)。
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pub(crate) async fn refresh_tokens(
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client: &Client,
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endpoints: &MicrosoftEndpoints,
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client_id: &str,
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refresh_token: &Secret,
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) -> AuthResult<OAuthTokens> {
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let reply = post_form(
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client,
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&endpoints.token,
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vec![
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("client_id", client_id.to_string()),
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("grant_type", "refresh_token".to_string()),
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("refresh_token", refresh_token.expose().to_string()),
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],
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)
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.await?;
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if let Some(error) = reply.text("error") {
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// `invalid_grant` + `AADSTS70000` = 授权被撤销/过期 → 唯一该重新登录的信号。
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if error == "invalid_grant" {
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let description = reply.text("error_description").unwrap_or("");
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if description.contains("AADSTS70000") {
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return Err(AuthError::CredentialExpired);
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}
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}
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return Err(oauth_error(&reply, &endpoints.token));
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}
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if !reply.is_success() {
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return Err(oauth_error(&reply, &endpoints.token));
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}
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tokens_from(&reply, &endpoints.token)
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}
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fn tokens_from(reply: &Reply, url: &str) -> AuthResult<OAuthTokens> {
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let access_token = reply
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.text("access_token")
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.ok_or_else(|| AuthError::Malformed(format!("{url} 响应缺 access_token")))?;
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let refresh_token = reply
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.text("refresh_token")
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.ok_or_else(|| AuthError::Malformed(format!("{url} 响应缺 refresh_token")))?;
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Ok(OAuthTokens {
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access_token: Secret::new(access_token),
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refresh_token: Secret::new(refresh_token),
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})
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}
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/// OAuth 错误归一:**`error` 非空即失败**(HMCL 只在两个字段都非空时处理,我们收紧)。
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fn oauth_error(reply: &Reply, url: &str) -> AuthError {
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let Some(code) = reply.text("error") else {
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return AuthError::network(
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url.split('?').next().unwrap_or(url),
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format!("HTTP {}(响应不是 OAuth 错误体)", reply.status),
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);
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};
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let description = reply
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.text("error_description")
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.unwrap_or("服务端未给描述")
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.to_string();
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if code == "invalid_grant" && description.contains("AADSTS70000") {
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return AuthError::CredentialExpired;
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}
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AuthError::Denied {
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code: code.to_string(),
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description,
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}
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}
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#[cfg(test)]
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mod tests {
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use super::{oauth_error, PollPolicy, DEFAULT_MIN_INTERVAL, DEVICE_CODE_MAX_WAIT};
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use crate::auth::error::AuthError;
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use crate::auth::http::Reply;
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use serde_json::json;
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#[test]
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fn default_policy_matches_hmcl_bounds() {
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let policy = PollPolicy::default();
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assert_eq!(policy.min_interval, DEFAULT_MIN_INTERVAL);
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assert_eq!(policy.max_wait, DEVICE_CODE_MAX_WAIT);
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assert_eq!(policy.max_wait.as_secs(), 900);
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}
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#[test]
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fn error_without_description_still_fails() {
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let reply = reply(400, Some(json!({ "error": "invalid_request" })));
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match oauth_error(&reply, "https://example.invalid/token") {
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AuthError::Denied { code, .. } => assert_eq!(code, "invalid_request"),
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other => panic!("应是 Denied,实际 {other:?}"),
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}
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}
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#[test]
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fn aadsts70000_becomes_credential_expired() {
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let reply = reply(
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400,
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Some(json!({
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"error": "invalid_grant",
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"error_description": "AADSTS70000: The grant is expired or revoked"
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})),
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);
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assert!(oauth_error(&reply, "https://example.invalid/token").is_credential_expired());
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}
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#[test]
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fn non_oauth_body_is_network_error() {
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let reply = reply(500, None);
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assert_eq!(
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oauth_error(&reply, "https://example.invalid/token").code(),
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"network"
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);
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}
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fn reply(status: u16, body: Option<serde_json::Value>) -> Reply {
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Reply {
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status,
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body,
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content_type: Some("application/json".to_string()),
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raw: None,
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}
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}
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}
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