fix(host): cancellable listing scans and O(log window) insertion

capability.list gains an optional AbortSignal threaded from the RPC
carrier's request signal (the pickDirectory pattern): a disconnected or
timed-out caller stops the opendir loop instead of the scan outliving
its caller, and the abort surfaces as its own reason rather than a
directory-unreadable dressing. boundedInsert rejects a full window's
at-or-beyond-tail candidate on one comparison and binary-inserts
retained candidates, so an oversized level no longer pays a window scan
per dirent.
This commit is contained in:
creatixchu
2026-07-29 04:42:13 +08:00
parent da970ea269
commit 7503390590
17 changed files with 68 additions and 27 deletions

View File

@@ -1076,7 +1076,7 @@ export function createApiProxy(ctx: Context, defaults: ApiProxyDefaults): ApiPro
}
},
async listDirectory(request) {
async listDirectory(request, signal) {
const capability = ctx.directoryPicker.capability()
if (capability.kind !== 'browse') {
return err(request, {
@@ -1086,7 +1086,9 @@ export function createApiProxy(ctx: Context, defaults: ApiProxyDefaults): ApiPro
})
}
try {
return ok(request, await capability.list(request.payload.path))
// The carrier's signal follows the caller: a disconnect or timeout
// stops the backend's directory scan instead of outliving it.
return ok(request, await capability.list(request.payload.path, signal))
} catch (error: unknown) {
return err(request, directoryError(error))
}

View File

@@ -62,10 +62,13 @@ export interface HostApi {
/**
* List one directory level for the in-app browser; an absent path lists the
* host account's home directory. Only served under the `browse` capability;
* unreadable or missing targets fail with `directory-unreadable`.
* unreadable or missing targets fail with `directory-unreadable`. The
* carrier's request signal follows the caller, stopping the backend's scan
* on disconnect or timeout.
*/
listDirectory(
request: RpcRequest<{ path?: string }>,
signal: AbortSignal,
): Promise<RpcResponse<DirectoryListing>>
/**

View File

@@ -64,7 +64,7 @@ const UNARY_ROUTES: UnaryRoutes = {
'session.cancel': { schema: sessionCancelRequestSchema, invoke: (api, r) => api.sessions.cancel(r) },
'host.describe': { schema: hostDescribeRequestSchema, invoke: (api, r) => api.host.describe(r) },
'host.pickDirectory': { schema: hostPickDirectoryRequestSchema, invoke: (api, r, signal) => api.host.pickDirectory(r, signal) },
'host.listDirectory': { schema: hostListDirectoryRequestSchema, invoke: (api, r) => api.host.listDirectory(r) },
'host.listDirectory': { schema: hostListDirectoryRequestSchema, invoke: (api, r, signal) => api.host.listDirectory(r, signal) },
'host.createDirectory': { schema: hostCreateDirectoryRequestSchema, invoke: (api, r) => api.host.createDirectory(r) },
'host.openPath': { schema: hostOpenPathRequestSchema, invoke: (api, r, signal) => api.host.openPath(r, signal) },
'workspace.list': { schema: workspaceListRequestSchema, invoke: (api, r) => api.workspace.list(r) },