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[feat] add MCP file browsing and cancellable transfers

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dijunkun
2026-11-06 20:36:48 +08:00
parent 0aed57ed4d
commit 6bfcd5cf3d
20 changed files with 537 additions and 23 deletions
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apps/mcp/src/server.ts
+26 -2
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@@ -124,7 +124,8 @@ export function createServer(
inputSchema: schema,
annotations: {
readOnlyHint: !!d.readOnly,
destructiveHint: ["crossdesk_action", "crossdesk_unlock"].includes(d.name),
destructiveHint: ["crossdesk_action", "crossdesk_unlock", "crossdesk_clipboard_set",
"crossdesk_files_transfer", "crossdesk_files_cancel"].includes(d.name),
openWorldHint: true,
},
...(d.ui || d.app
@@ -316,6 +317,28 @@ export function createServer(
"Read the remote text clipboard within the authorized control session.",
async (p, ctx) => output(await sessions.clipboard({ ...p, operation: "get" }, ctx.mcpReq.signal)),
{ readOnly: true });
const filePath = z.string().max(4096).refine((path) => !path.includes("\0"));
add("crossdesk_files_list", z.strictObject({ session_id: id, path: filePath.default(""),
request_id: z.int().min(1).max(4294967295).optional(), offset: z.int().min(0).default(0) }),
"List a remote directory. Empty path selects the remote home and @roots lists filesystem roots. Results contain up to 256 entries. Continue with request_id and next_offset while present. A timed-out listing remains queryable with its request_id.",
async (p, ctx) => output(await sessions.files({ ...p, operation: "list" }, ctx.mcpReq.signal)),
{ readOnly: true });
add("crossdesk_files_transfer", z.strictObject({ session_id: id, operation_id: id,
direction: z.enum(["upload", "download"]), paths: z.array(filePath.min(1)).min(1).max(256),
destination: filePath.min(1) }),
"Upload local files/folders or download remote files/folders into an existing absolute destination directory. paths are absolute source paths. Returns a transfer operation to monitor with crossdesk_files_status. Reuse the same operation_id and arguments to query the original transfer. Existing destination files receive a distinct name on conflict.",
async (p, ctx) => {
const { direction, ...args } = p;
return output(await sessions.files({ ...args, operation: direction }, ctx.mcpReq.signal));
});
add("crossdesk_files_status", z.strictObject({ session_id: id, operation_id: id,
offset: z.int().min(0).default(0) }),
"Get transfer progress, per-file completion and errors. Continue file entries with next_offset. Wait for completed, failed or cancelled before reporting a finished transfer.",
async (p, ctx) => output(await sessions.files({ ...p, operation: "status" }, ctx.mcpReq.signal)),
{ readOnly: true });
add("crossdesk_files_cancel", z.strictObject({ session_id: id, operation_id: id }),
"Cancel a transfer and remove its unfinished staging files. Completed files remain available.",
async (p, ctx) => output(await sessions.files({ ...p, operation: "cancel" }, ctx.mcpReq.signal)));
add("crossdesk_clipboard_set", z.strictObject({ session_id: id, operation_id: id,
text: z.string().max(16384).refine((text) => Buffer.byteLength(text) <= 16384 && !text.includes("\0")) }),
"Set or clear the remote text clipboard. Reuse the same operation_id to query the original result. Returns applied after the remote clipboard update.",
@@ -414,7 +437,8 @@ export function createServer(
inputSchema,
annotations: {
readOnlyHint: !!d.readOnly,
destructiveHint: ["crossdesk_action", "crossdesk_unlock"].includes(d.name),
destructiveHint: ["crossdesk_action", "crossdesk_unlock", "crossdesk_clipboard_set",
"crossdesk_files_transfer", "crossdesk_files_cancel"].includes(d.name),
openWorldHint: true,
},
...((d.ui || d.app) && apps(ctx)