Scope personal RAG uploads by owner (#446)

routes/personal_routes.py

@@ -2,7 +2,8 @@
 """Routes for personal documents management."""
 import os
 import logging
-from typing import List
+import uuid
+from typing import List, Tuple
 from fastapi import APIRouter, HTTPException, Query, Request, UploadFile, File, Depends
 from src.request_models import DirectoryRequest
 from core.constants import BASE_DIR, PERSONAL_DIR
@@ -12,9 +13,39 @@ from core.middleware import require_admin
 from src.upload_handler import secure_filename
 
 UPLOADS_DIR = os.path.join(BASE_DIR, "data", "personal_uploads")
+MAX_PERSONAL_UPLOAD_BYTES = int(
+    os.getenv("ODYSSEUS_PERSONAL_UPLOAD_MAX_BYTES", str(25 * 1024 * 1024))
+)
 
 logger = logging.getLogger(__name__)
 
+
+def _personal_upload_dir_for_owner(owner: str | None) -> str:
+    """Return the per-owner upload directory used for direct RAG uploads."""
+    owner_segment = secure_filename((owner or "local").strip())[:80] or "local"
+    upload_dir = os.path.abspath(os.path.join(UPLOADS_DIR, owner_segment))
+    base_abs = os.path.abspath(UPLOADS_DIR)
+    if os.path.commonpath([upload_dir, base_abs]) != base_abs:
+        raise ValueError("Unsafe upload owner path")
+    os.makedirs(upload_dir, exist_ok=True)
+    return upload_dir
+
+
+def _unique_personal_upload_path(upload_dir: str, original_name: str | None) -> Tuple[str, str, str]:
+    """Build a collision-resistant upload path while preserving a display name."""
+    safe_name = secure_filename(os.path.basename(original_name or "upload"))
+    if not safe_name or safe_name.startswith("."):
+        safe_name = "upload"
+
+    stem, ext = os.path.splitext(safe_name)
+    stem = (stem or "upload")[:80]
+    filename = f"{stem}-{uuid.uuid4().hex[:10]}{ext.lower()}"
+    file_path = os.path.abspath(os.path.join(upload_dir, filename))
+    upload_abs = os.path.abspath(upload_dir)
+    if os.path.commonpath([file_path, upload_abs]) != upload_abs:
+        raise ValueError("Unsafe upload filename")
+    return file_path, filename, safe_name
+
 def setup_personal_routes(personal_docs_manager, rag_manager, rag_available):
     """
     Setup personal documents related routes.
@@ -165,7 +196,7 @@ def setup_personal_routes(personal_docs_manager, rag_manager, rag_available):
         if not rag:
             raise HTTPException(503, "RAG system is not available — is the embedding service running?")
 
-        os.makedirs(UPLOADS_DIR, exist_ok=True)
+        upload_dir = _personal_upload_dir_for_owner(user)
 
         total_indexed = 0
         total_failed = 0
@@ -173,18 +204,12 @@ def setup_personal_routes(personal_docs_manager, rag_manager, rag_available):
 
         for upload in files:
             try:
-                # Sanitize filename — strip directory components and unsafe chars
-                safe_name = secure_filename(os.path.basename(upload.filename or "upload"))
-                if not safe_name or safe_name.startswith("."):
-                    safe_name = f"upload_{total_indexed + total_failed}"
-                file_path = os.path.join(UPLOADS_DIR, safe_name)
-                # Defense-in-depth: ensure resolved path stays under UPLOADS_DIR
-                base_abs = os.path.abspath(UPLOADS_DIR)
-                if os.path.commonpath([os.path.abspath(file_path), base_abs]) != base_abs:
-                    logger.warning(f"Rejected unsafe upload path: {upload.filename!r}")
+                file_path, stored_name, safe_name = _unique_personal_upload_path(upload_dir, upload.filename)
+                content_bytes = await upload.read(MAX_PERSONAL_UPLOAD_BYTES + 1)
+                if len(content_bytes) > MAX_PERSONAL_UPLOAD_BYTES:
+                    logger.warning(f"Rejected oversized personal upload: {upload.filename!r}")
                     total_failed += 1
                     continue
-                content_bytes = await upload.read()
                 with open(file_path, "wb") as f:
                     f.write(content_bytes)
 
@@ -205,7 +230,8 @@ def setup_personal_routes(personal_docs_manager, rag_manager, rag_available):
                     metadata = {
                         "source": file_path,
                         "filename": safe_name,
-                        "directory": UPLOADS_DIR,
+                        "stored_filename": stored_name,
+                        "directory": upload_dir,
                         "type": ext,
                         "chunk_id": i,
                     }
@@ -223,7 +249,7 @@ def setup_personal_routes(personal_docs_manager, rag_manager, rag_available):
 
         # Track uploads directory
         if uploaded_files and hasattr(personal_docs_manager, "add_directory"):
-            personal_docs_manager.add_directory(UPLOADS_DIR, index=False)
+            personal_docs_manager.add_directory(upload_dir, index=False)
 
         return {
             "success": True,

tests/test_personal_upload_isolation.py

@@ -0,0 +1,44 @@
+import os
+from pathlib import Path
+
+from routes import personal_routes
+
+
+def test_personal_upload_paths_are_owner_scoped_and_unique(tmp_path, monkeypatch):
+    monkeypatch.setattr(personal_routes, "UPLOADS_DIR", str(tmp_path))
+
+    alice_dir = personal_routes._personal_upload_dir_for_owner("alice")
+    bob_dir = personal_routes._personal_upload_dir_for_owner("bob")
+
+    assert Path(alice_dir).parent == tmp_path
+    assert Path(bob_dir).parent == tmp_path
+    assert alice_dir != bob_dir
+
+    first_path, first_stored, first_display = personal_routes._unique_personal_upload_path(
+        alice_dir,
+        "notes.txt",
+    )
+    second_path, second_stored, second_display = personal_routes._unique_personal_upload_path(
+        alice_dir,
+        "notes.txt",
+    )
+
+    assert first_display == second_display == "notes.txt"
+    assert first_stored != second_stored
+    assert first_path != second_path
+    assert Path(first_path).parent == Path(alice_dir)
+    assert Path(second_path).parent == Path(alice_dir)
+
+
+def test_personal_upload_paths_stay_under_upload_root(tmp_path, monkeypatch):
+    monkeypatch.setattr(personal_routes, "UPLOADS_DIR", str(tmp_path))
+
+    upload_dir = personal_routes._personal_upload_dir_for_owner("../alice")
+    file_path, stored_name, display_name = personal_routes._unique_personal_upload_path(
+        upload_dir,
+        "../../.env",
+    )
+
+    assert os.path.commonpath([file_path, upload_dir]) == upload_dir
+    assert Path(file_path).name == stored_name
+    assert display_name == "env"