Add chunked upload for large files

Backend/Main.py

@@ -36,9 +36,11 @@ from Explorer import (
     CreateEntry,
     DeleteEntry,
     EnsureDirectoryNote,
+    FinishChunkedUpload,
     ListDirectory,
     ListRoots,
     MoveEntry,
+    SaveUploadChunk,
     SaveUploadedFile,
 )
 from Groups import (
@@ -465,6 +467,49 @@ async def PostUploadEndpoint(
     return {"Saved": SavedNames, "Errors": Errors}
 
 
+@Application.post("/api/upload/chunk")
+async def PostUploadChunkEndpoint(
+    Root: str,
+    Path: str,
+    UploadId: str,
+    ChunkIndex: int,
+    TotalChunks: int,
+    FileName: str,
+    Chunk: UploadFile = File(...),
+    CurrentUser: dict = Depends(GetCurrentUser),
+) -> dict:
+    RequirePathAccessible(Root, Path, CurrentUser)
+
+    try:
+        ChunkBytes = await Chunk.read()
+        SaveUploadChunk(UploadId, ChunkIndex, ChunkBytes)
+    except ValueError as Error:
+        raise HTTPException(status_code=400, detail=str(Error))
+
+    return {"Received": ChunkIndex}
+
+
+@Application.post("/api/upload/complete")
+def PostUploadCompleteEndpoint(
+    Root: str,
+    Path: str,
+    UploadId: str,
+    TotalChunks: int,
+    FileName: str,
+    CurrentUser: dict = Depends(GetCurrentUser),
+) -> dict:
+    RequirePathAccessible(Root, Path, CurrentUser)
+
+    try:
+        SavedName = FinishChunkedUpload(Root, Path, UploadId, TotalChunks, FileName)
+    except (ValueError, FileExistsError, NotADirectoryError) as Error:
+        raise HTTPException(status_code=400, detail=str(Error))
+    except OSError as Error:
+        raise HTTPException(status_code=400, detail=f"Could not save file ({Error})")
+
+    return {"Saved": SavedName}
+
+
 class MoveEntryRequest(BaseModel):
     NewName: str | None = None
     DestinationPath: str | None = None