dsh-workspace-upload

English | 中文

A workspace file-manager plugin for the dsh
Web profile — browse, upload, download, rename, create and delete files in the
session's workspace, right from the chat UI.

Features

• A 文件 (Files) button in the composer's left controls opens a file-manager
  dialog over the app:
  • browse the workspace and its subdirectories (breadcrumb navigation, up /
    refresh);
  • upload — multi-file, chunked, any size (640 KiB chunks, adaptive shrink
    under proxy body limits);
  • download files;
  • rename files and folders;
  • create folders;
  • delete files and folders (two-step confirm).
• Every operation is scoped to the workspace root: host-side path containment
  rejects any .. or absolute-path escape.
• The workspace resolves to the session's workspace (session → cwd → first
  registered workspace).

Directory structure

dsh-workspace-upload/
├── cordis.patch.yml      # profile patch layer: inserts the plugin row
├── package.json          # dsh.bundle / dsh.client declarations, exports
├── lib/
│   ├── index.js          # host half: /api/workspace-upload file-manager route
│   └── client.js         # client half: browser bundle (button + dialog)
├── test/
│   ├── protocol.mjs      # host protocol tests (real handler, no dsh needed)
│   └── simulate.mjs      # client kernel simulation (slot registration fake)
├── LICENSE               # MIT
├── .gitignore
├── README.md             # English
└── README-zh.md          # 中文

Architecture

One package, one profile row, two halves:

Wiring:

• package.json → dsh.bundle.patch points at cordis.patch.yml (the profile
  layer that inserts the row) and dsh.client.platform: "web" marks the
  package as a browser-roster entry whose bundle ships via exports["./client"].
• cordis.patch.yml inserts one row, workspace-upload, into the web
  composition.

API

GET  /api/workspace-upload
       → { "workspace": "<resolved workspace dir>" }        (no params)
       → file download with attachment headers              (?sessionId&path&name)

File-manager modes (JSON POST; path is a workspace-relative directory
"" / "sub" / "sub/deep", name is always one path segment):

{ "mode": "list",   "sessionId"?, "path"? }                    → { workspace, path, entries:[{name,type,size,mtime}] }
{ "mode": "rename", "sessionId"?, "path"?, "name", "newName" } → { ok, from, to }
{ "mode": "mkdir",  "sessionId"?, "path"?, "name" }            → { ok, path }
{ "mode": "delete", "sessionId"?, "path"?, "name" }            → { ok, deleted }

Chunked upload (any file size; the GUI sends 640 KiB chunks — base64 bodies
~853 KiB, under the nginx default client_max_body_size of 1 MiB; on a bare
413 the client halves the chunk size down to 64 KiB and retries):

{ "mode": "chunk",  "sessionId"?, "path"?, "transferId", "name", "offset", "data", "total" } → { received }
{ "mode": "finish", "sessionId"?, "path"?, "transferId", "name", "total", "overwrite"? }     → { status, path, bytes }
{ "mode": "abort",  "transferId" }                                                            → { aborted }

Chunks are appended to a hidden .dsh-upload-<transferId> temp file inside the
target directory and renamed on finish. Chunks must arrive in order from
offset 0; a repeated chunk at an already-received offset is answered
idempotently (safe client retry). Orphaned transfers are swept after
30 minutes.

A legacy single-shot batch mode is kept for API/curl compatibility:

{ "sessionId"?, "files": [{ "name", "data": "<base64>", "overwrite"? }] }
  → { "workspace": string, "results": [{ name, path?, status, bytes?, error? }] }

Limits: 32 MiB per request (one chunk + overhead), 8 MiB decoded per chunk.
overwrite: true replaces an existing file; otherwise the file is skipped with
status: "skipped".

Install

The package installs as a dsh profile bundle. From the checkout that owns the
package directory:

dsh plugin --profile web add ./dsh-workspace-upload
# or from a clone:  dsh plugin --profile web add /path/to/dsh-workspace-upload

Then restart the web profile (dsh web ...) so the loader picks up the new
row, and refresh the browser. Removing the plugin:

dsh plugin --profile web remove dsh-workspace-upload

Development

Both tests run without a dsh instance (they exercise the real host handler and
client bundle factory directly):

node test/protocol.mjs   # host protocol: list/rename/mkdir/delete/download/chunked upload
node test/simulate.mjs   # client kernel: slot registration against a faithful slots fake

Security notes

• All path / name values are sanitized and containment-checked on the host;
  uploads use hidden temp files that never escape the target directory.
• The route inherits the dsh web server's bind (localhost by default); when
  exposing the GUI remotely, put it behind the same TLS/Basic-Auth reverse
  proxy as the rest of the app (and raise client_max_body_size if you want
  fewer, larger chunks).