feat: add file upload endpoint for remote cache

requirements.txt

@@ -3,5 +3,6 @@ redis>=5.0.0
 requests>=2.31.0
 fastapi>=0.109.0
 uvicorn>=0.27.0
+python-multipart>=0.0.6
 # Core artdag from GitHub
 git+https://github.com/gilesbradshaw/art-dag.git

server.py

@@ -16,7 +16,7 @@ from datetime import datetime, timezone
 from pathlib import Path
 from typing import Optional
 
-from fastapi import FastAPI, HTTPException
+from fastapi import FastAPI, HTTPException, UploadFile, File
 from fastapi.responses import FileResponse
 from pydantic import BaseModel
 
@@ -232,6 +232,29 @@ async def import_to_cache(path: str):
     return {"content_hash": content_hash, "cached": True}
 
 
+@app.post("/cache/upload")
+async def upload_to_cache(file: UploadFile = File(...)):
+    """Upload a file to cache."""
+    # Write to temp file first
+    import tempfile
+    with tempfile.NamedTemporaryFile(delete=False) as tmp:
+        content = await file.read()
+        tmp.write(content)
+        tmp_path = Path(tmp.name)
+
+    # Hash and move to cache
+    content_hash = file_hash(tmp_path)
+    cache_path = CACHE_DIR / content_hash
+
+    if not cache_path.exists():
+        import shutil
+        shutil.move(str(tmp_path), cache_path)
+    else:
+        tmp_path.unlink()
+
+    return {"content_hash": content_hash, "filename": file.filename, "size": len(content)}
+
+
 if __name__ == "__main__":
     import uvicorn
     uvicorn.run(app, host="0.0.0.0", port=8100)