post files with protection from dublicats

api.py

@@ -0,0 +1,37 @@
+from fastapi import FastAPI, File, UploadFile
+from sqlalchemy import exists
+import hashlib
+import db
+
+def compute_hash(data: bytes, algorithm="sha256") -> str:
+    h = hashlib.new(algorithm)
+    h.update(data)
+    return h.hexdigest()
+
+app = FastAPI()
+
+@app.get("/")
+def root():
+    return {"message": "hiii from sfs"}
+
+
+@app.post("/")
+async def save_file(file: UploadFile = File(...)):
+    contents = await file.read()
+    
+    hash = compute_hash(contents)
+
+    existed_url = db.file_exists(file.size, hash)
+
+    if not existed_url:
+        file_url = db.add_file(file.filename, file.content_type, file.size, hash)
+    
+        with open(f"files/{file.filename}", "wb") as f:
+            f.write(contents)
+        return {"status": "saved", "filename": file_url}
+    else:
+        return {"status": "file_exists", "filename": existed_url}
+
+@app.get("/api/healthchecker")
+def healthchecker():
+    return {"message": "Howdy :3"}