feat: richText resource extraction and downloadFileToFile

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+    branches: ["**"]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  test:
+    name: Java Test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java-version: ["8", "11", "17"]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          java-version: ${{ matrix.java-version }}
+          distribution: "temurin"
+          cache: "maven"
+      - name: Build & Test
+        run: mvn -B clean test

OVERVIEW.md

@@ -1,36 +1,38 @@
-# 钉钉 Channel SDK 家族 · 项目总览
+**English** | [简体中文](./OVERVIEW.zh-CN.md)
 
-> 起点议题：[DingTalk-Real-AI/dingtalk-workspace-cli#796](https://github.com/DingTalk-Real-AI/dingtalk-workspace-cli/issues/796)——「钉钉未来会出 Channel 这样的集成 SDK 吗」。
-> 本项目给出答案：**四个语言、效果对齐、即拿即用**。
+# DingTalk Channel SDK Family · Project Overview
 
-## 1. 产出物
+> Origin issue: [DingTalk-Real-AI/dingtalk-workspace-cli#796](https://github.com/DingTalk-Real-AI/dingtalk-workspace-cli/issues/796)—"Will DingTalk offer a Channel-like integration SDK in the future?"
+> This project provides the answer: **Four languages, effect parity, ready to use**.
 
-| 仓库 | 语言 | 依赖 | 测试 |
+## 1. Deliverables
+
+| Repository | Language | Dependencies | Tests |
 |---|---|---|---|
-| [typefield/dingtalk-channel-sdk-go](https://github.com/typefield/dingtalk-channel-sdk-go) | Go 1.22+ | gorilla/websocket | 19 tests（-race 干净） |
-| [typefield/dingtalk-channel-sdk-nodejs](https://github.com/typefield/dingtalk-channel-sdk-nodejs) | Node 18+ | ws | 12 tests |
-| [typefield/dingtalk-channel-sdk-python](https://github.com/typefield/dingtalk-channel-sdk-python) | Python 3.10+ | websockets | 12 tests |
-| [typefield/dingtalk-channel-sdk-java](https://github.com/typefield/dingtalk-channel-sdk-java) | JDK 8+ | Java-WebSocket + Gson | 12 tests |
+| [DingTalk-Real-AI/dingtalk-channel-sdk-go](https://github.com/DingTalk-Real-AI/dingtalk-channel-sdk-go) | Go 1.22+ | gorilla/websocket | 19 tests (-race clean) |
+| [DingTalk-Real-AI/dingtalk-channel-sdk-nodejs](https://github.com/DingTalk-Real-AI/dingtalk-channel-sdk-nodejs) | Node 18+ | ws | 12 tests |
+| [DingTalk-Real-AI/dingtalk-channel-sdk-python](https://github.com/DingTalk-Real-AI/dingtalk-channel-sdk-python) | Python 3.10+ | websockets | 12 tests |
+| [DingTalk-Real-AI/dingtalk-channel-sdk-java](https://github.com/DingTalk-Real-AI/dingtalk-channel-sdk-java) | JDK 8+ | Java-WebSocket + Gson | 12 tests |
 
-每仓含：完整源码、单测、`SPEC.md`（四语言统一契约）、流式 echo 示例、**livecheck 真实联调程序**、README、MIT LICENSE。
+Each repository contains: complete source code, unit tests, `SPEC.md` (unified contract across four languages), streaming echo examples, **livecheck real integration program**, README, MIT LICENSE.
 
-## 2. 定位与边界
+## 2. Positioning and Boundaries
 
-**与 Agent runtime 解耦的会话接入层**。SDK 负责"通道"的全部脏活，开发者只写「用户说了什么、机器人回什么」：
+**A conversation access layer decoupled from Agent runtime**. The SDK handles all the dirty work of the "channel", developers only write "what the user said and what the bot should respond with":
 
-- **负责**：Stream 长连接（建连/心跳/指数退避重连/服务端 disconnect 自愈）、事件双层去重 + 过期消息过滤、sessionWebhook 回复（文本/Markdown/图片，超长自动分片）、AI 卡片流式输出（打字机、帧间隔防竞态、看门狗孤儿保护）、卡片 API 全局限流与 QpsLimit 退避、媒体上传/下载与媒体消息（file/video/audio）、Markdown 归一化、主动发消息（单聊/群聊 + @）、🤔Thinking/🥳Done 状态章、显式中止 Abort、错误兜底冷却
-- **不管**：Agent runtime（模型/prompt/工具编排）、会话上下文持久化、凭据存储、业务操作（文档/表格/日历——dws CLI 与 skills 的领域）
+- **Responsible for**: Stream long connection (connect/heartbeat/exponential backoff reconnection/server disconnect recovery), dual-layer event deduplication + expired message filtering, sessionWebhook replies (text/Markdown/image, auto-chunking for oversized content), AI card streaming output (typewriter effect, inter-frame interval race protection, watchdog orphan protection), card API global rate limiting and QpsLimit backoff, media upload/download and media messages (file/video/audio), Markdown normalization, proactive messaging (DM/group + @), 🤔Thinking/🥳Done status badges, explicit abort, error fallback cooldown
+- **Not responsible for**: Agent runtime (model/prompt/tool orchestration), conversation context persistence, credential storage, business operations (docs/spreadsheets/calendar—domain of dws CLI and skills)
 
-## 3. 快速上手（四语言同构）
+## 3. Quick Start (Four Languages Isomorphic)
 
 ```go
 ch := channel.New(channel.Config{ClientID: "ding...", ClientSecret: "..."})
 ch.OnMessage(func(ctx context.Context, msg *channel.IncomingMessage, reply channel.Reply) error {
-    s, _ := reply.Stream(ctx)              // 秒级出"输入中"卡片
+    s, _ := reply.Stream(ctx)              // "Typing" card appears in seconds
     for _, tok := range myLLM(msg.Text) {
-        _ = s.Append(tok)                  // 打字机追加（800ms 节流+trailing flush）
+        _ = s.Append(tok)                  // Typewriter append (800ms throttle + trailing flush)
     }
-    return s.Finish("")                    // 终帧定格
+    return s.Finish("")                    // Final frame finalization
 })
 ch.Start(ctx)
 ```
@@ -46,64 +48,64 @@ async def handle(msg, reply): s = await reply.stream(); await s.append(tok); awa
 ch.onMessage((msg, reply) -> { CardStreamer s = reply.stream(); s.append(tok); s.finish(""); });
 ```
 
-非流式：`reply.Text/Markdown/Image`、附件下载 `reply.DownloadURL`、媒体上传 `reply.UploadMedia`；
-主动发消息（不依赖入站）：`ch.SendText/SendMarkdown/SendImage`，群发支持 `AtUserIds/AtAll`；
-卡片交互：`ch.OnCardAction`（注册即自动订阅 card topic）。
+Non-streaming: `reply.Text/Markdown/Image`, attachment download `reply.DownloadURL`, media upload `reply.UploadMedia`;
+Proactive messaging (independent of inbound): `ch.SendText/SendMarkdown/SendImage`, group messaging supports `AtUserIds/AtAll`;
+Card interaction: `ch.OnCardAction` (registration automatically subscribes to card topic).
 
-## 4. 效果对齐（验收清单 E1–E10，见 SPEC §0）
+## 4. Effect Parity (Acceptance Checklist E1–E10, see SPEC §0)
 
-| | 用户可见效果 | 实现 |
+| | User-Visible Effect | Implementation |
 |---|---|---|
-| E1 | 发消息秒级出"输入中"卡片 | `stream()` 立即建卡+投递 INPUTING |
-| E2 | 打字机平滑追加 | streaming 接口 + 800ms 节流 + **trailing flush**（窗口内不丢）+ 长间隔 300ms 攒批 |
-| E3 | 完成后 loading 消失、Markdown 定格 | isFinalize 终帧 + FINISHED 状态 |
-| E4 | 卡片失败/限流用户无感 | 静默降级 webhook 文本；QpsLimit 退避 2s 重试 |
-| E5 | 群聊/单聊同一体验 | 同一 Reply API；投递目标自动选；群聊剥 @ 前缀 |
-| E6 | 绝不重复回复 | messageId+msgId 双层去重（TTL 5min） |
-| E7 | 卡片交互闭环 | OnCardAction + 自动订阅 |
-| E8 | 永不掉线 | 指数退避重连 + disconnect 即时重连 + 120s/5s 心跳 + ACK 先行 |
-| E9 | 媒体收发 | uploadMedia（OAPI multipart）/ downloadURL / image 回复 |
-| E10 | Markdown 渲染质量 | normalizeForCard（代码块/表格/引用钉钉渲染规则） |
-
-每条在四语言均有对应单测；E8 另有专门的断线重连 e2e 回归。
-
-## 5. 协议保真（真源，非文档臆测）
-
-| 能力 | 真源 |
+| E1 | "Typing" card appears seconds after sending message | `stream()` immediately creates card + delivers INPUTING |
+| E2 | Smooth typewriter append | streaming interface + 800ms throttle + **trailing flush** (no drops within window) + long interval 300ms batching |
+| E3 | Loading disappears after completion, Markdown finalizes | isFinalize final frame + FINISHED status |
+| E4 | Card failure/rate limiting transparent to user | Silent fallback to webhook text; QpsLimit backoff 2s retry |
+| E5 | Same experience in group/DM | Same Reply API; delivery target auto-selected; group strips @ prefix |
+| E6 | Never duplicate replies | messageId+msgId dual-layer deduplication (TTL 5min) |
+| E7 | Card interaction closed loop | OnCardAction + auto-subscribe |
+| E8 | Never disconnects | Exponential backoff reconnection + disconnect immediate reconnection + 120s/5s heartbeat + ACK first |
+| E9 | Media send/receive | uploadMedia (OAPI multipart) / downloadURL / image reply |
+| E10 | Markdown rendering quality | normalizeForCard (code blocks/tables/quotes DingTalk rendering rules) |
+
+Each item has corresponding unit tests in all four languages; E8 has dedicated disconnect reconnection e2e regression.
+
+## 5. Protocol Fidelity (Ground Truth, Not Documentation Speculation)
+
+| Capability | Ground Truth Source |
 |---|---|
-| Stream 线协议（open/wss/帧/ACK/心跳/topic 常量） | 官方 dingtalk-stream-sdk-go 源码逐行对照 |
-| AI 卡片五步协议 + 限流 + Markdown 归一化 | 官方 connector（dingtalk-openclaw-connector）card.ts |
-| token（新版/OAPI 双轨）与 sessionWebhook 载荷 | 官方 connector token.ts / messaging.ts + 官方文档校验 |
-| 主动发消息 API | dws（dingtalk-workspace-cli）源码 |
-| ticket 编码 / localIp / UA 头 | 四门官方 stream SDK 交叉对照取齐 |
+| Stream wire protocol (open/wss/frames/ACK/heartbeat/topic constants) | Official dingtalk-stream-sdk-go source code line-by-line comparison |
+| AI card five-step protocol + rate limiting + Markdown normalization | Official connector (dingtalk-openclaw-connector) card.ts |
+| Token (new version/OAPI dual-track) and sessionWebhook payload | Official connector token.ts / messaging.ts + official documentation validation |
+| Proactive messaging API | dws (dingtalk-workspace-cli) source code |
+| Ticket encoding / localIp / UA headers | Cross-referenced across all four official stream SDKs |
 
-Review 轮次中修复的协议级问题：msgParam 字符串化 JSON（官方文档要求）、Go 版 disconnect 误停、ACK 先行语义、ticket URL 编码。
+Protocol-level issues fixed during review rounds: msgParam JSON stringification (official documentation requirement), Go disconnect mis-stop, ACK first semantics, ticket URL encoding.
 
-## 6. 关键架构决策：为什么自研传输层而非引用官方 stream-sdk
+## 6. Key Architectural Decision: Why Build Custom Transport Layer Instead of Using Official stream-sdk
 
-1. **官方 connector 自己都不信任**：钉钉官方 connector 源码 `autoReconnect:false, keepAlive:false` 全关重写（issue #571/#536/#573）
-2. **四语言一致是本项目验收标准**，而官方四门 SDK 心跳/重连/编码行为互不一致，引用即继承分歧
-3. **依赖重量**：官方 Java 版引 Netty 多模块、Python 版带 requests+aiohttp 双 HTTP 栈；自研每语言仅 1–2 个小依赖，传输层约 300 行/语言
-4. 留有演进接缝（`Channel → StreamConn → onFrame` 单一边界），上游 SDK 成熟后可加官方适配后端
+1. **Official connector doesn't trust itself**: DingTalk official connector source code has `autoReconnect:false, keepAlive:false` all disabled and rewritten (issues #571/#536/#573)
+2. **Four-language consistency is this project's acceptance standard**, while official four SDKs have inconsistent heartbeat/reconnection/encoding behaviors; referencing them inherits divergence
+3. **Dependency weight**: Official Java version pulls Netty multi-modules, Python version includes requests+aiohttp dual HTTP stack; custom implementation only 1–2 small dependencies per language, transport layer ~300 lines/language
+4. Leaves evolution seam (`Channel → StreamConn → onFrame` single boundary), official SDK adapter backend can be added later when upstream matures
 
-## 7. 质量证据
+## 7. Quality Evidence
 
-- **测试**：Go 14 / Node 12 / Python 12 / Java 12（BUILD SUCCESS），全部含 e2e（假网关+假 API）与断线重连回归
-- **真实联调**：每语言 `example/livecheck` 一键验证（连接→收消息→文本回复→卡片流式全周期→媒体上传，逐步 PASS/FAIL）：
-  `DD_CLIENT_ID=... DD_CLIENT_SECRET=... go run ./example/livecheck`（Node `npm run live`；Python `python example/livecheck.py`；Java `mvn exec:java`）
-- **Code review**：三轮（协议一致性 / 效果对齐 / stream 层对官方 SDK），修复 8 处问题，全部有回归测试
+- **Tests**: Go 14 / Node 12 / Python 12 / Java 12 (BUILD SUCCESS), all include e2e (mock gateway + mock API) and disconnect reconnection regression
+- **Real integration**: Each language's `example/livecheck` one-command verification (connection→receive message→text reply→card streaming full cycle→media upload, progressive PASS/FAIL):
+  `DD_CLIENT_ID=... DD_CLIENT_SECRET=... go run ./example/livecheck` (Node `npm run live`; Python `python example/livecheck.py`; Java `mvn exec:java`)
+- **Code review**: Three rounds (protocol consistency / effect parity / stream layer vs official SDK), fixed 8 issues, all have regression tests
 
-## 8. 已知边界与路线图
+## 8. Known Boundaries and Roadmap
 
-- 真实凭据联跑待执行（livecheck 就绪，一条命令）
-- >20MB 文件分块上传（v0.2）
-- 卡片模板默认值为 connector 内置模板，对外发布建议配置化强调
-- 平台差异项（reaction/评论/转发）随钉钉开放平台演进跟进
-- 可选：官方 stream-sdk 适配后端（`WithTransport` 接缝已留）
+- Real credential live testing to be executed (livecheck ready, one command)
+- >20MB file chunked upload (v0.2)
+- Card template default value is connector built-in template, recommended to make it configurable for public release
+- Platform differences (reaction/comment/forward) will follow DingTalk Open Platform evolution
+- Optional: Official stream-sdk adapter backend (seam already left via `WithTransport`)
 
-## 9. 前置条件
+## 9. Prerequisites
 
-钉钉开发者后台创建**企业内部应用**并开启机器人，取得 ClientID/ClientSecret。Stream 模式无需公网 IP 与域名。
+Create **Enterprise Internal Application** in DingTalk Developer Console and enable bot, obtain ClientID/ClientSecret. Stream mode requires no public IP or domain.
 
 ---
-License：MIT ｜ 契约：各仓 `SPEC.md` ｜ 版本：v0.1.0（2026-08）
+License: MIT | Contract: `SPEC.md` in each repo | Version: v0.1.0 (Aug 2026)

README.md

@@ -10,7 +10,7 @@ Requires JDK 8+. Dependencies: Java-WebSocket and Gson only.
 
 ```xml
 <dependency>
-  <groupId>io.github.typefield</groupId>
+  <groupId>com.dingtalk</groupId>
   <artifactId>dingtalk-channel-sdk</artifactId>
   <version>0.1.0</version>
 </dependency>
@@ -69,7 +69,7 @@ s.finish("");
 Application code typically imports only the root package:
 
 ```java
-import io.github.typefield.dingtalk.channel.DingTalkChannel;
+import com.dingtalk.channel.DingTalkChannel;
 ```
 
 Sub-packages (`normalize` / `safety` / `outbound`) are internal layering and carry no compatibility promise.
@@ -98,7 +98,7 @@ Live check:
 
 ```bash
 DD_CLIENT_ID=... DD_CLIENT_SECRET=... \
-  mvn -q compile exec:java -Dexec.mainClass=io.github.typefield.dingtalk.channel.example.LiveCheck
+  mvn -q compile exec:java -Dexec.mainClass=com.dingtalk.channel.example.LiveCheck
 ```
 
 ## License

README.zh-CN.md

@@ -10,7 +10,7 @@
 
 ```xml
 <dependency>
-  <groupId>io.github.typefield</groupId>
+  <groupId>com.dingtalk</groupId>
   <artifactId>dingtalk-channel-sdk</artifactId>
   <version>0.1.0</version>
 </dependency>
@@ -69,7 +69,7 @@ s.finish("");
 业务代码通常只需导入根包：
 
 ```java
-import io.github.typefield.dingtalk.channel.DingTalkChannel;
+import com.dingtalk.channel.DingTalkChannel;
 ```
 
 子包（`normalize` / `safety` / `outbound`）属内部分层，不在兼容性承诺范围内。
@@ -98,7 +98,7 @@ mvn test        # 34 个测试
 
 ```bash
 DD_CLIENT_ID=... DD_CLIENT_SECRET=... \
-  mvn -q compile exec:java -Dexec.mainClass=io.github.typefield.dingtalk.channel.example.LiveCheck
+  mvn -q compile exec:java -Dexec.mainClass=com.dingtalk.channel.example.LiveCheck
 ```
 
 ## License