feat(canvas): restructure source directory for Canvas Agent, enhancing code maintainability

2026-08-05 00:34:22 +08:00 · 2026-07-29 10:47:06 +08:00
parent 92fd0ce129
commit 40c47dd7ff
20 changed files with 3095 additions and 777 deletions
@@ -0,0 +1,253 @@
+import express, { type NextFunction, type Request, type Response } from "express";
+
+import { runClaudeTurn } from "../agent/claude.js";
+import { archiveCodexThread, interruptCodexTurn, isRecoverableThreadError, listCodexThreads, readCodexThread, resumeCodexThread, runCodexTurn, startCodexThread, summarizeCodexThread, verifyCodexThreadWorkspace } from "../agent/codex.js";
+import type { AgentAttachment } from "../agent/types.js";
+import { CanvasSession } from "../canvas/session.js";
+import { DEFAULT_PORT, ensureSiteWorkspace, loadConfig, saveConfig, updateSiteWorkspace, type CanvasAgentConfig } from "../config.js";
+import { logger } from "../utils/logger.js";
+
+/** 启动仅监听本机的 Canvas Agent HTTP 服务。 */
+export function startHttpServer() {
+    const config = loadConfig(true);
+    const port = Number(process.env.PORT) || Number(new URL(config.url).port) || DEFAULT_PORT;
+    config.url = `http://127.0.0.1:${port}`;
+    saveConfig(config);
+
+    const session = new CanvasSession();
+    /** 将 Agent 事件广播到所属线程或全部网页。 */
+    const emit = (type: string, payload: unknown) => {
+        const data = payload && typeof payload === "object" && !Array.isArray(payload) ? payload as Record<string, unknown> : { value: payload };
+        const threadId = String(data.threadId || data.thread_id || ensureSiteWorkspace(config).activeThreadId || "");
+        threadId ? session.emitThread(type, threadId, data) : session.emitAll(type, data);
+    };
+    /** 保存并广播当前站点工作空间的活跃线程。 */
+    const setActiveThread = (activeThreadId: string, payload: Record<string, unknown> = {}) => {
+        const workspace = updateSiteWorkspace(config, { activeThreadId: activeThreadId || undefined });
+        session.emitThread("workspace_changed", activeThreadId, { ...payload, activeThreadId });
+        return workspace;
+    };
+    const app = express();
+    app.disable("x-powered-by");
+    app.use(express.json({ limit: "30mb" }));
+    app.use((req, res, next) => {
+        if (!logger.enabled) return next();
+        const startedAt = Date.now();
+        const url = requestUrl(req, config);
+        res.on("finish", () => {
+            if (req.method === "OPTIONS" || (res.statusCode < 400 && ["/health", "/canvas/state", "/canvas/activate"].includes(url.pathname))) return;
+            logger.debug(`HTTP ${req.method} ${url.pathname}`, { status: res.statusCode, durationMs: Date.now() - startedAt });
+        });
+        next();
+    });
+    app.use((req, res, next) => {
+        const url = requestUrl(req, config);
+        if (!setCors(req, res, url, config)) return void res.status(403).json({ ok: false, error: "origin not allowed" });
+        if (req.method === "OPTIONS") return void res.json({});
+        next();
+    });
+    app.get("/health", (_req, res) => res.json(session.health()));
+    app.get("/config", (_req, res) => res.json({ ok: true, url: config.url, hasToken: true }));
+    app.use((req, res, next) => {
+        if (validToken(req, requestUrl(req, config), config.token)) return next();
+        res.status(401).json({ ok: false, error: "invalid token" });
+    });
+    app.get("/events", (req, res) => session.openEvents(requestUrl(req, config), res));
+    app.post("/canvas/state", (req, res) => {
+        session.updateState(req.body, String(req.query.clientId || "") || undefined);
+        res.json({ ok: true });
+    });
+    app.post("/canvas/activate", (req, res) => {
+        session.activateClient(String(req.query.clientId || ""));
+        res.json({ ok: true });
+    });
+    app.post("/canvas/result", (req, res) => {
+        const ok = session.resolveResult(String(req.query.clientId || ""), req.body);
+        res.status(ok ? 200 : 409).json({ ok });
+    });
+    app.get("/agent/attachments/:attachmentId", route(async (req, res) => {
+        const attachment = session.getTurnAttachment(String(req.query.clientId || ""), routeParam(req.params.attachmentId));
+        const data = attachment.dataUrl.split(",", 2)[1];
+        if (!data) throw new Error("图片附件内容无效");
+        res.setHeader("Cache-Control", "no-store");
+        res.type(attachment.type).send(Buffer.from(data, "base64"));
+    }));
+    app.post("/api/tools", route(async (req, res) => res.json({ ok: true, result: await session.callTool(req.body?.name, req.body?.input || {}) })));
+    app.get("/agent/codex/workspace", (_req, res) => {
+        const workspace = ensureSiteWorkspace(config);
+        res.json({ ok: true, workspace });
+    });
+    app.get("/agent/codex/threads", route(async (req, res) => {
+        const workspace = ensureSiteWorkspace(config);
+        const result = await listCodexThreads(emit, { cwd: workspace.workspacePath, searchTerm: String(req.query.searchTerm || "") });
+        res.json({ ok: true, workspace, ...result });
+    }));
+    app.post("/agent/codex/threads/new", route(async (_req, res) => {
+        if (session.codexBusy) return res.status(409).json({ ok: false, error: "Codex 正在运行，请等待当前任务完成" });
+        const workspace = ensureSiteWorkspace(config);
+        const thread = await startCodexThread(emit, workspace.workspacePath);
+        const activeThreadId = String((thread as Record<string, unknown>).id || "");
+        const nextWorkspace = setActiveThread(activeThreadId, { emptyThread: true });
+        res.json({ ok: true, workspace: nextWorkspace, thread: summarizeCodexThread(thread), messages: [] });
+    }));
+    app.get("/agent/codex/threads/:threadId", route(async (req, res) => {
+        const workspace = ensureSiteWorkspace(config);
+        const threadId = routeParam(req.params.threadId);
+        try {
+            res.json({ ok: true, workspace, ...(await readCodexThread(emit, threadId, workspace.workspacePath)) });
+        } catch (error) {
+            if (workspace.activeThreadId !== threadId || !isRecoverableThreadError(error)) throw error;
+            res.json({ ok: true, workspace, thread: { id: threadId, preview: "", cwd: workspace.workspacePath }, messages: [] });
+        }
+    }));
+    app.post("/agent/codex/threads/:threadId/resume", route(async (req, res) => {
+        if (session.codexBusy) return res.status(409).json({ ok: false, error: "Codex 正在运行，请等待当前任务完成" });
+        const workspace = ensureSiteWorkspace(config);
+        const threadId = routeParam(req.params.threadId);
+        const result = await resumeCodexThread(emit, threadId, workspace.workspacePath);
+        const nextWorkspace = setActiveThread(threadId);
+        res.json({ ok: true, workspace: nextWorkspace, ...result });
+    }));
+    app.post("/agent/codex/threads/:threadId/delete", route(async (req, res) => {
+        if (session.codexBusy) return res.status(409).json({ ok: false, error: "Codex 正在运行，请等待当前任务完成" });
+        const workspace = ensureSiteWorkspace(config);
+        const threadId = routeParam(req.params.threadId);
+        await archiveCodexThread(emit, threadId, workspace.workspacePath);
+        setActiveThread(workspace.activeThreadId === threadId ? "" : workspace.activeThreadId || "");
+        res.json({ ok: true });
+    }));
+    app.post("/agent/codex/turn", route(async (req, res) => {
+        if (session.codexBusy) return res.status(409).json({ ok: false, error: "Codex 正在运行，请等待当前任务完成" });
+        const attachments = Array.isArray(req.body?.attachments) ? (req.body.attachments as AgentAttachment[]) : [];
+        const workspace = ensureSiteWorkspace(config);
+        const prompt = String(req.body?.prompt || "");
+        if (!prompt.trim()) return res.status(400).json({ ok: false, error: "请输入任务内容" });
+        const clientId = String(req.body?.clientId || "");
+        logger.info("Codex turn accepted", { threadId: req.body?.threadId, promptLength: prompt.length, attachmentCount: attachments.length });
+        session.setCodexState({ busy: true, threadId: String(req.body?.threadId || workspace.activeThreadId || ""), turnId: "" });
+        try {
+            let threadId = String(req.body?.threadId || workspace.activeThreadId || "");
+            let turnId = "";
+            if (!threadId) {
+                const thread = await startCodexThread(emit, workspace.workspacePath);
+                threadId = String((thread as Record<string, unknown>).id || "");
+                setActiveThread(threadId, { emptyThread: true });
+            } else if (threadId !== workspace.activeThreadId) {
+                await verifyCodexThreadWorkspace(emit, threadId, workspace.workspacePath);
+                setActiveThread(threadId);
+            }
+            const attachmentRefs = session.setTurnAttachments(clientId, attachments);
+            const chatMessage = {
+                sourceClientId: clientId,
+                message: { id: String(req.body?.messageId || Date.now()), role: "user", text: String(req.body?.messageText || prompt || `发送了 ${attachments.length} 张图片`) },
+            };
+            let chatThreadId = "";
+            /** 将当前 turn 事件固定广播到实际线程。 */
+            const turnEmit = (type: string, payload: unknown) => {
+                const data = payload && typeof payload === "object" && !Array.isArray(payload) ? payload as Record<string, unknown> : { value: payload };
+                session.emitThread(type, threadId, data);
+            };
+            void runCodexTurn(withAttachmentContext(prompt, attachmentRefs), turnEmit, attachments, {
+                threadId,
+                cwd: workspace.workspacePath,
+                appEmit: emit,
+                onStart: clientId ? () => session.bindClient(clientId) : undefined,
+                onThread: (actualThreadId) => {
+                    if (actualThreadId !== threadId) {
+                        threadId = actualThreadId;
+                        setActiveThread(threadId, { emptyThread: true });
+                    }
+                    session.setCodexState({ busy: true, threadId, turnId: "" });
+                    if (chatThreadId !== threadId) {
+                        chatThreadId = threadId;
+                        session.emitThread("chat_message", threadId, chatMessage);
+                    }
+                },
+                onTurn: (actualTurnId) => {
+                    turnId = actualTurnId;
+                    logger.info("Codex turn started", { threadId, turnId });
+                    session.setCodexState({ busy: true, threadId, turnId });
+                },
+                onFinish: () => {
+                    logger.info("Codex turn finished", { threadId, turnId });
+                    session.clearTurnAttachments(clientId);
+                    if (clientId) session.releaseClient(clientId);
+                    session.setCodexState({ busy: false, threadId, turnId });
+                },
+            });
+            res.json({ ok: true, threadId });
+        } catch (error) {
+            session.setCodexState({ busy: false, threadId: String(req.body?.threadId || workspace.activeThreadId || ""), turnId: "" });
+            throw error;
+        }
+    }));
+    app.post("/agent/codex/interrupt", (req, res) => {
+        const ok = interruptCodexTurn(String(req.body?.threadId || ""));
+        res.json({ ok });
+    });
+    app.post("/agent/claude/turn", (req, res) => {
+        runClaudeTurn(String(req.body?.prompt || ""), emit);
+        res.json({ ok: true });
+    });
+    app.use((_req, res) => res.status(404).json({ ok: false, error: "not found" }));
+    app.use((error: Error, req: Request, res: Response, _next: NextFunction) => {
+        logger.error("HTTP request failed", { method: req.method, path: req.path, error });
+        res.status(500).json({ ok: false, error: error.message });
+    });
+
+    app.listen(port, "127.0.0.1", () => {
+        console.log("Infinite Canvas Agent");
+        console.log(`Local URL: ${config.url}`);
+        console.log(`Connect token: ${config.token}`);
+        console.log("Codex MCP is not installed by this command.");
+        console.log("Optional MCP add: codex mcp add infinite-canvas -- npx -y @basketikun/canvas-agent mcp");
+        console.log("Remove manually added MCP: codex mcp remove infinite-canvas");
+        if (logger.enabled) console.log(`Debug log: ${logger.filePath}`);
+        logger.info("Canvas Agent started", { url: config.url, workspace: ensureSiteWorkspace(config).workspacePath, debugLog: logger.filePath });
+    });
+}
+
+/** 将异步 Express 路由异常交给统一错误处理中间件。 */
+function route(handler: (req: Request, res: Response) => Promise<unknown>) {
+    return (req: Request, res: Response, next: NextFunction) => void handler(req, res).catch(next);
+}
+
+/** 从 Express 路由参数中读取单个字符串。 */
+function routeParam(value: string | string[]) {
+    return Array.isArray(value) ? value[0] || "" : value;
+}
+
+/** 结合服务配置解析当前请求 URL。 */
+function requestUrl(req: Request, config: CanvasAgentConfig) {
+    return new URL(req.originalUrl || req.url || "/", config.url);
+}
+
+/** 设置跨域响应头并记录通过 token 授权的来源。 */
+function setCors(req: Request, res: Response, url: URL, config: CanvasAgentConfig) {
+    const origin = req.headers.origin;
+    res.setHeader("Access-Control-Allow-Origin", origin || "*");
+    res.setHeader("Access-Control-Allow-Headers", "content-type,x-canvas-agent-token");
+    res.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS");
+    res.setHeader("Access-Control-Allow-Private-Network", "true");
+    if (!origin || req.method === "OPTIONS" || url.pathname === "/health" || url.pathname === "/config") return true;
+    config.origins ||= [];
+    if (validToken(req, url, config.token) && !config.origins.includes(origin)) {
+        config.origins.push(origin);
+        saveConfig(config);
+    }
+    res.setHeader("Vary", "Origin");
+    return config.origins.includes(origin);
+}
+
+/** 校验请求查询参数或请求头中的连接 token。 */
+function validToken(req: Request, url: URL, token: string) {
+    const header = req.headers["x-canvas-agent-token"];
+    return url.searchParams.get("token") === token || header === token || (Array.isArray(header) && header.includes(token));
+}
+
+/** 向 Agent 提示词追加本轮图片附件引用说明。 */
+function withAttachmentContext(prompt: string, attachments: Array<{ id: string; name: string }>) {
+    if (!attachments.length) return prompt;
+    const list = attachments.map((item, index) => `${index + 1}. attachmentId=${item.id}, name=${JSON.stringify(item.name)}`).join("\n");
+    return `${prompt}\n\n本轮可用图片附件（顺序与图片输入一致）：\n${list}\n需要把附件放入画布或作为生成参考图时，先调用 canvas_create_attachment_nodes，再使用返回的画布节点 ID 创建生成流程。`;
+}