opendal/services/obs/
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 quick_xml::de;
22
23use super::core::*;
24use super::error::parse_error;
25use crate::raw::*;
26use crate::EntryMode;
27use crate::Metadata;
28use crate::Result;
29
30pub struct ObsLister {
31    core: Arc<ObsCore>,
32    path: String,
33    delimiter: &'static str,
34    limit: Option<usize>,
35}
36
37impl ObsLister {
38    pub fn new(core: Arc<ObsCore>, path: &str, recursive: bool, limit: Option<usize>) -> Self {
39        let delimiter = if recursive { "" } else { "/" };
40
41        Self {
42            core,
43            path: path.to_string(),
44            delimiter,
45            limit,
46        }
47    }
48}
49
50impl oio::PageList for ObsLister {
51    async fn next_page(&self, ctx: &mut oio::PageContext) -> Result<()> {
52        let resp = self
53            .core
54            .obs_list_objects(&self.path, &ctx.token, self.delimiter, self.limit)
55            .await?;
56
57        if resp.status() != http::StatusCode::OK {
58            return Err(parse_error(resp));
59        }
60
61        let bs = resp.into_body();
62
63        let output: ListObjectsOutput =
64            de::from_reader(bs.reader()).map_err(new_xml_deserialize_error)?;
65
66        // Try our best to check whether this list is done.
67        //
68        // - Check `next_marker`
69        ctx.done = match output.next_marker.as_ref() {
70            None => true,
71            Some(next_marker) => next_marker.is_empty(),
72        };
73        ctx.token = output.next_marker.clone().unwrap_or_default();
74
75        let common_prefixes = output.common_prefixes;
76
77        for prefix in common_prefixes {
78            let de = oio::Entry::new(
79                &build_rel_path(&self.core.root, &prefix.prefix),
80                Metadata::new(EntryMode::DIR),
81            );
82
83            ctx.entries.push_back(de);
84        }
85
86        for object in output.contents {
87            let mut path = build_rel_path(&self.core.root, &object.key);
88            if path.is_empty() {
89                path = "/".to_string();
90            }
91
92            let meta = Metadata::new(EntryMode::from_path(&path)).with_content_length(object.size);
93
94            let de = oio::Entry::with(path, meta);
95
96            ctx.entries.push_back(de);
97        }
98
99        Ok(())
100    }
101}
opendal/services/obs/lister.rs

opendal/services/obs/
lister.rs
