feat(official-sync): 下载失败携带类型化错误码

用类型化错误(不做 message 匹配)把资源下载失败归到准确的 BAT-ERR 码:

- curl_transfer：CurlFailureKind::error_code() 映射到网络域码(403→300001、
  404→300002、5xx→300005、dns/connect/timeout/tls/interrupted→30001x、
  proxy→310001、其余→300015)；CurlRetryError::final_error_code() 取末次失败的码。
- official_download：新增 pub DownloadError { code, message }，From<String>→internal，
  Display/Error；pull_* 的返回类型由 String 改为 DownloadError，内部 String 错误经
  From 归 internal，下载失败边界带 pull_one 的 error_code()，非官方 URL 带
  non_official_url(300030)。
- official_update：pull 错误改用 anyhow::Error::new 保留 DownloadError 类型。
- 任务 worker：downcast DownloadError 取 code 写入任务记录的 error（失败不再一律
  900001），非下载失败仍归 internal。

验证：新增 kind→code 映射单测；pull 404 测试断言 DownloadError.code()==HTTP_NOT_FOUND；
lib/core 全量测试通过，clippy --all-targets 干净。

范围说明:本次覆盖资源下载路径;launcher/metadata 拉取(official_launcher)的网络
失败仍归 internal,可按同一模式后续接入。

对应 issue #1（错误码细分映射，第一批）。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

infrastructure/src/bin/bat_official_sync.rs

@@ -930,6 +930,11 @@ fn run_task_worker(
             }),
             Err(error) => {
                 let cancelled = cancel.load(Ordering::Relaxed);
+                // 下载失败携带类型化 DownloadError（含准确网络域码）；其余归 internal。
+                let code = error
+                    .downcast_ref::<bat_infrastructure::DownloadError>()
+                    .map(bat_infrastructure::DownloadError::code)
+                    .unwrap_or(ErrorCode::INTERNAL);
                 registry.update(&job.id, |record| {
                     record.finished_at = Some(unix_seconds_now());
                     if cancelled {
@@ -941,11 +946,8 @@ fn run_task_worker(
                         ));
                     } else {
                         record.status = "failed";
-                        record.error = Some(ApiError::new(
+                        record.error =
-                            ErrorCode::INTERNAL,
+                            Some(ApiError::new(code, "task.executor", error.to_string()));
-                            "task.executor",
-                            error.to_string(),
-                        ));
                     }
                 });
             }

infrastructure/src/curl_transfer.rs

@@ -229,6 +229,26 @@ impl CurlFailureKind {
         }
     }
 
+    /// 映射到统一错误码（网络域 3xx；代理故障 310001）。
+    pub(crate) fn error_code(&self) -> bat_core::ErrorCode {
+        use bat_core::ErrorCode;
+        match self {
+            Self::HttpForbidden => ErrorCode::HTTP_FORBIDDEN,
+            Self::HttpNotFound => ErrorCode::HTTP_NOT_FOUND,
+            Self::HttpClientError => ErrorCode::HTTP_CLIENT_ERROR,
+            Self::HttpTooManyRequests => ErrorCode::HTTP_TOO_MANY_REQUESTS,
+            Self::HttpServerError => ErrorCode::HTTP_SERVER_ERROR,
+            Self::Dns => ErrorCode::NETWORK_DNS,
+            Self::Connect => ErrorCode::NETWORK_CONNECT,
+            Self::Timeout => ErrorCode::NETWORK_TIMEOUT,
+            Self::Tls => ErrorCode::NETWORK_TLS,
+            Self::Interrupted => ErrorCode::NETWORK_INTERRUPTED,
+            Self::Proxy => ErrorCode::PROXY_FAILURE,
+            Self::HttpUnknown | Self::Network | Self::Unknown => ErrorCode::NETWORK_OTHER,
+            Self::ProcessFailed => ErrorCode::INTERNAL,
+        }
+    }
+
     pub(crate) fn is_retryable(&self) -> bool {
         match self {
             // 代理故障（认证失败、代理主机解析/连接失败）多为配置错误，per-URL 层
@@ -346,6 +366,11 @@ impl CurlRetryError {
         self.final_failure().map(|failure| failure.kind.as_str())
     }
 
+    pub(crate) fn final_error_code(&self) -> Option<bat_core::ErrorCode> {
+        self.final_failure()
+            .map(|failure| failure.kind.error_code())
+    }
+
     pub(crate) fn final_http_status(&self) -> Option<u16> {
         self.final_failure().and_then(|failure| failure.http_status)
     }
@@ -547,6 +572,22 @@ mod tests {
         assert!(!failure.retryable());
     }
 
+    #[test]
+    fn failure_kind_maps_to_error_code() {
+        use bat_core::ErrorCode;
+        assert_eq!(
+            CurlFailureKind::HttpForbidden.error_code().id(),
+            ErrorCode::HTTP_FORBIDDEN.id()
+        );
+        assert_eq!(
+            CurlFailureKind::HttpNotFound.error_code().id(),
+            "BAT-ERR-300002"
+        );
+        assert_eq!(CurlFailureKind::Proxy.error_code().id(), "BAT-ERR-310001");
+        assert_eq!(CurlFailureKind::Timeout.error_code().id(), "BAT-ERR-300012");
+        assert_eq!(CurlFailureKind::Network.error_code().id(), "BAT-ERR-300015");
+    }
+
     #[test]
     fn parse_http_status_anchors_on_curl_error_context() {
         // 状态码前出现无关三位数字（如端口 443）时，仍从 "error" 之后取真正的状态码。

infrastructure/src/lib.rs

@@ -32,7 +32,7 @@ pub use import::{
     ResourceImportService,
 };
 pub use official_download::{
-    OfficialLocalManifestAuditItem, OfficialLocalManifestAuditReport,
+    DownloadError, OfficialLocalManifestAuditItem, OfficialLocalManifestAuditReport,
     OfficialLocalManifestAuditStatus, OfficialLocalVerificationReport, OfficialResourcePullItem,
     OfficialResourcePullProgress, OfficialResourcePullProgressKind, OfficialResourcePullReport,
     OfficialResourcePullService, OfficialResourcePullStatus,

infrastructure/src/official_download.rs

@@ -18,6 +18,44 @@ use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::time::{SystemTime, UNIX_EPOCH};
 
+/// 官方资源下载错误：携带统一错误码，便于 CLI/RPC 归类。
+///
+/// 下载链路内部大量使用 `Result<_, String>`；这些经 `From<String>` 归入
+/// `internal`，只有 curl 下载失败等有明确来源的错误会带上准确的网络域码。
+#[derive(Debug)]
+pub struct DownloadError {
+    code: bat_core::ErrorCode,
+    message: String,
+}
+
+impl DownloadError {
+    fn new(code: bat_core::ErrorCode, message: impl Into<String>) -> Self {
+        Self {
+            code,
+            message: message.into(),
+        }
+    }
+
+    /// 该错误的统一错误码。
+    pub fn code(&self) -> bat_core::ErrorCode {
+        self.code
+    }
+}
+
+impl From<String> for DownloadError {
+    fn from(message: String) -> Self {
+        Self::new(bat_core::ErrorCode::INTERNAL, message)
+    }
+}
+
+impl std::fmt::Display for DownloadError {
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        formatter.write_str(&self.message)
+    }
+}
+
+impl std::error::Error for DownloadError {}
+
 const DOWNLOAD_MANIFEST_FILE: &str = "official-download-manifest.json";
 const DOWNLOAD_QUARANTINE_FILE: &str = "official-download-quarantine.json";
 const DOWNLOAD_MANIFEST_VERSION: u32 = 1;
@@ -495,7 +533,7 @@ impl OfficialResourcePullService {
     pub fn pull(
         &self,
         plan: &OfficialResourcePullPlan,
-    ) -> Result<OfficialResourcePullReport, String> {
+    ) -> Result<OfficialResourcePullReport, DownloadError> {
         self.pull_with_progress(plan, |_| {})
     }
 
@@ -505,7 +543,7 @@ impl OfficialResourcePullService {
         &self,
         plan: &OfficialResourcePullPlan,
         mut progress: impl FnMut(OfficialResourcePullProgress),
-    ) -> Result<OfficialResourcePullReport, String> {
+    ) -> Result<OfficialResourcePullReport, DownloadError> {
         self.pull_with_progress_and_cancellation(plan, &mut progress, || false)
     }
 
@@ -516,7 +554,7 @@ impl OfficialResourcePullService {
         plan: &OfficialResourcePullPlan,
         mut progress: impl FnMut(OfficialResourcePullProgress),
         mut should_cancel: impl FnMut() -> bool,
-    ) -> Result<OfficialResourcePullReport, String> {
+    ) -> Result<OfficialResourcePullReport, DownloadError> {
         self.ensure_output_root_ready()?;
 
         let official_hash_pairs = official_seed_hash_pairs(plan);
@@ -530,7 +568,7 @@ impl OfficialResourcePullService {
         let mut processed_urls = HashSet::<String>::new();
         for (offset, url) in urls.into_iter().enumerate() {
             if should_cancel() {
-                return Err("官方资源拉取已被停止请求中断".to_string());
+                return Err("官方资源拉取已被停止请求中断".to_string().into());
             }
 
             let index = offset + 1;
@@ -541,7 +579,10 @@ impl OfficialResourcePullService {
             ));
 
             if !is_official_yostar_jp_url(&url) {
-                return Err(format!("拒绝下载非官方 URL：{url}"));
+                return Err(DownloadError::new(
+                    bat_core::ErrorCode::NON_OFFICIAL_URL,
+                    format!("拒绝下载非官方 URL：{url}"),
+                ));
             }
 
             let destination = self.destination_for_url(&url)?;
@@ -574,10 +615,13 @@ impl OfficialResourcePullService {
                             url.clone(),
                             &error,
                         ));
-                        return Err(format!(
+                        return Err(DownloadError::new(
+                            error.error_code(),
+                            format!(
                                 "官方资源下载失败：URL 已进入 quarantine，中止本轮同步、不发布不完整资源；url={url} quarantine={}；{}",
                                 self.download_quarantine_path().display(),
                                 error.message
+                            ),
                         ));
                     }
                 };
@@ -613,7 +657,7 @@ impl OfficialResourcePullService {
         }
 
         if should_cancel() {
-            return Err("官方资源拉取已被停止请求中断".to_string());
+            return Err("官方资源拉取已被停止请求中断".to_string().into());
         }
         self.verify_all_official_hashes_are_complete(&official_hash_pairs, &verified_hash_urls)?;
 
@@ -1552,6 +1596,14 @@ impl PullOneError {
             .and_then(CurlRetryError::final_kind_label)
     }
 
+    /// 映射到统一错误码：curl 重试失败取网络域码，其余（进程/续传/替换等）归 INTERNAL。
+    fn error_code(&self) -> bat_core::ErrorCode {
+        self.retry_error
+            .as_ref()
+            .and_then(CurlRetryError::final_error_code)
+            .unwrap_or(bat_core::ErrorCode::INTERNAL)
+    }
+
     fn http_status(&self) -> Option<u16> {
         self.retry_error
             .as_ref()
@@ -2190,7 +2242,7 @@ exit 22
             )
             .unwrap_err();
 
-        assert!(error.contains("危险路径"));
+        assert!(error.to_string().contains("危险路径"));
     }
 
     #[test]
@@ -2251,7 +2303,7 @@ exit 22
         let error = service
             .pull(&build_official_pull_plan(discovery_plan(), inventory()))
             .unwrap_err();
-        assert!(error.contains("symlink"));
+        assert!(error.to_string().contains("symlink"));
         assert!(fs::read_dir(&escape_dir).unwrap().next().is_none());
     }
 
@@ -2537,7 +2589,7 @@ exit 22
         };
 
         let error = service.pull(&plan).unwrap_err();
-        assert!(error.contains("官方 hash 校验失败"));
+        assert!(error.to_string().contains("官方 hash 校验失败"));
 
         let manifest = service.read_download_manifest().unwrap();
         assert!(manifest.entries.is_empty());
@@ -2592,7 +2644,7 @@ exit 22
 
         let error = service.pull(&plan).unwrap_err();
 
-        assert!(error.contains("ZIP"));
+        assert!(error.to_string().contains("ZIP"));
         assert!(!partial_path_for(&service.destination_for_url(zip_url).unwrap()).exists());
         assert!(service.read_download_manifest().unwrap().entries.is_empty());
     }
@@ -2801,9 +2853,11 @@ exit 22
             .pull_with_progress(&plan, |event| events.push(event))
             .unwrap_err();
 
-        assert!(error.contains("quarantine"));
+        assert!(error.to_string().contains("quarantine"));
-        assert!(error.contains("http_not_found"));
+        assert!(error.to_string().contains("http_not_found"));
-        assert!(error.contains("retryable=false"));
+        assert!(error.to_string().contains("retryable=false"));
+        // 类型化错误携带准确的 HTTP 404 网络域码。
+        assert_eq!(error.code(), bat_core::ErrorCode::HTTP_NOT_FOUND);
         assert_eq!(
             fs::read_to_string(curl_path.with_extension("state")).unwrap(),
             "1"
@@ -2849,8 +2903,10 @@ exit 22
             let expected_retryable = fixture["retryable"].as_bool().unwrap();
             let expected_attempts = fixture["expected_attempts"].as_u64().unwrap();
 
-            assert!(error.contains(expected_kind));
+            assert!(error.to_string().contains(expected_kind));
-            assert!(error.contains(&format!("retryable={expected_retryable}")));
+            assert!(error
+                .to_string()
+                .contains(&format!("retryable={expected_retryable}")));
             assert_eq!(
                 fs::read_to_string(curl_path.with_extension("state")).unwrap(),
                 expected_attempts.to_string()
@@ -2877,7 +2933,9 @@ exit 22
         )
         .unwrap_err();
 
-        assert!(error.contains(fixture["expected_error_contains"].as_str().unwrap()));
+        assert!(error
+            .to_string()
+            .contains(fixture["expected_error_contains"].as_str().unwrap()));
     }
 
     #[test]
@@ -2895,9 +2953,9 @@ exit 22
 
         let error = service.pull(&plan).unwrap_err();
 
-        assert!(error.contains("quarantine"));
+        assert!(error.to_string().contains("quarantine"));
-        assert!(error.contains("http_server_error"));
+        assert!(error.to_string().contains("http_server_error"));
-        assert!(error.contains("retryable=true"));
+        assert!(error.to_string().contains("retryable=true"));
         assert_eq!(
             fs::read_to_string(curl_path.with_extension("state")).unwrap(),
             "3"

infrastructure/src/official_update.rs

@@ -1339,7 +1339,8 @@ impl OfficialUpdateService {
                 },
                 &mut should_cancel,
             )
-            .map_err(|error| anyhow::anyhow!(error))
+            // 用 Error::new 保留 DownloadError 类型（含错误码），供上层 downcast 归类。
+            .map_err(anyhow::Error::new)
             .inspect_err(|error| {
                 let _ = version_state_guard.fail(&error.to_string());
             })?;