opendal/services/dbfs/
lister.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18use std::sync::Arc;
19
20use bytes::Buf;
21use http::StatusCode;
22use serde::Deserialize;
23
24use super::core::DbfsCore;
25use super::error::parse_error;
26use crate::raw::*;
27use crate::*;
28
29pub struct DbfsLister {
30    core: Arc<DbfsCore>,
31    path: String,
32}
33
34impl DbfsLister {
35    pub fn new(core: Arc<DbfsCore>, path: String) -> Self {
36        Self { core, path }
37    }
38}
39
40impl oio::PageList for DbfsLister {
41    async fn next_page(&self, ctx: &mut oio::PageContext) -> Result<()> {
42        let response = self.core.dbfs_list(&self.path).await?;
43
44        let status_code = response.status();
45        if !status_code.is_success() {
46            if status_code == StatusCode::NOT_FOUND {
47                ctx.done = true;
48                return Ok(());
49            }
50            let error = parse_error(response);
51            return Err(error);
52        }
53
54        let bytes = response.into_body();
55        let decoded_response: DbfsOutputList =
56            serde_json::from_reader(bytes.reader()).map_err(new_json_deserialize_error)?;
57
58        ctx.done = true;
59
60        for status in decoded_response.files {
61            let entry: oio::Entry = match status.is_dir {
62                true => {
63                    let normalized_path = format!("{}/", &status.path);
64                    let mut meta = Metadata::new(EntryMode::DIR);
65                    meta.set_last_modified(Timestamp::from_millisecond(status.modification_time)?);
66                    oio::Entry::new(&normalized_path, meta)
67                }
68                false => {
69                    let mut meta = Metadata::new(EntryMode::FILE);
70                    meta.set_last_modified(Timestamp::from_millisecond(status.modification_time)?);
71                    meta.set_content_length(status.file_size as u64);
72                    oio::Entry::new(&status.path, meta)
73                }
74            };
75            ctx.entries.push_back(entry);
76        }
77        Ok(())
78    }
79}
80
81#[derive(Debug, Deserialize)]
82struct DbfsOutputList {
83    files: Vec<DbfsStatus>,
84}
85
86#[derive(Debug, Deserialize)]
87struct DbfsStatus {
88    path: String,
89    is_dir: bool,
90    file_size: i64,
91    modification_time: i64,
92}
opendal/services/dbfs/lister.rs

opendal/services/dbfs/
lister.rs
