| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| //! into_reader will provide different implementations to convert into |
| //! [`oio::Read`][crate::raw::oio::Read] |
| //! |
| //! - (Some(offset), Some(size)) => by_range |
| //! - (Some(offset), None) => by_offset |
| //! - (None, Some(size)) => by_tail |
| //! - (None, None) => by_offset |
| //! |
| //! The main different is whether and when to call `stat` to get total |
| //! content length. |
| //! |
| //! # TODO |
| //! |
| //! We only implement by_range so far. |
| //! |
| //! We should implement other types so that they can be zero cost on non-seek |
| //! cases. |
| //! |
| //! For example, for `by_full`, we don't need to do `stat` everytime. If |
| //! user call `poll_read` first, we can get the total_size from returning |
| //! reader. In this way, we can save 40ms in average for every s3 read call. |
| |
| mod by_range; |
| pub use by_range::by_range; |
| pub use by_range::RangeReader; |
| |
| mod from_fd; |
| pub use from_fd::from_fd; |
| pub use from_fd::FdReader; |
