opendal/services/dropbox/
backend.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::fmt::Debug;
19use std::sync::Arc;
20
21use bytes::Buf;
22use http::Response;
23use http::StatusCode;
24
25use super::core::*;
26use super::delete::DropboxDeleter;
27use super::error::*;
28use super::lister::DropboxLister;
29use super::writer::DropboxWriter;
30use crate::raw::*;
31use crate::*;
32
33#[derive(Clone, Debug)]
34pub struct DropboxBackend {
35    pub core: Arc<DropboxCore>,
36}
37
38impl Access for DropboxBackend {
39    type Reader = HttpBody;
40    type Writer = oio::OneShotWriter<DropboxWriter>;
41    type Lister = oio::PageLister<DropboxLister>;
42    type Deleter = oio::OneShotDeleter<DropboxDeleter>;
43
44    fn info(&self) -> Arc<AccessorInfo> {
45        self.core.info.clone()
46    }
47
48    async fn create_dir(&self, path: &str, _args: OpCreateDir) -> Result<RpCreateDir> {
49        // Check if the folder already exists.
50        let resp = self.core.dropbox_get_metadata(path).await?;
51        if StatusCode::OK == resp.status() {
52            let bytes = resp.into_body();
53            let decoded_response: DropboxMetadataResponse =
54                serde_json::from_reader(bytes.reader()).map_err(new_json_deserialize_error)?;
55            if "folder" == decoded_response.tag {
56                return Ok(RpCreateDir::default());
57            }
58            if "file" == decoded_response.tag {
59                return Err(Error::new(
60                    ErrorKind::NotADirectory,
61                    format!("it's not a directory {}", path),
62                ));
63            }
64        }
65
66        let res = self.core.dropbox_create_folder(path).await?;
67        Ok(res)
68    }
69
70    async fn stat(&self, path: &str, _: OpStat) -> Result<RpStat> {
71        let resp = self.core.dropbox_get_metadata(path).await?;
72        let status = resp.status();
73        match status {
74            StatusCode::OK => {
75                let bytes = resp.into_body();
76                let decoded_response: DropboxMetadataResponse =
77                    serde_json::from_reader(bytes.reader()).map_err(new_json_deserialize_error)?;
78                let entry_mode: EntryMode = match decoded_response.tag.as_str() {
79                    "file" => EntryMode::FILE,
80                    "folder" => EntryMode::DIR,
81                    _ => EntryMode::Unknown,
82                };
83
84                let mut metadata = Metadata::new(entry_mode);
85                // Only set last_modified and size if entry_mode is FILE, because Dropbox API
86                // returns last_modified and size only for files.
87                // FYI: https://www.dropbox.com/developers/documentation/http/documentation#files-get_metadata
88                if entry_mode == EntryMode::FILE {
89                    let date_utc_last_modified =
90                        parse_datetime_from_rfc3339(&decoded_response.client_modified)?;
91                    metadata.set_last_modified(date_utc_last_modified);
92
93                    if let Some(size) = decoded_response.size {
94                        metadata.set_content_length(size);
95                    } else {
96                        return Err(Error::new(
97                            ErrorKind::Unexpected,
98                            format!("no size found for file {}", path),
99                        ));
100                    }
101                }
102                Ok(RpStat::new(metadata))
103            }
104            _ => Err(parse_error(resp)),
105        }
106    }
107
108    async fn read(&self, path: &str, args: OpRead) -> Result<(RpRead, Self::Reader)> {
109        let resp = self.core.dropbox_get(path, args.range(), &args).await?;
110
111        let status = resp.status();
112        match status {
113            StatusCode::OK | StatusCode::PARTIAL_CONTENT => {
114                Ok((RpRead::default(), resp.into_body()))
115            }
116            _ => {
117                let (part, mut body) = resp.into_parts();
118                let buf = body.to_buffer().await?;
119                Err(parse_error(Response::from_parts(part, buf)))
120            }
121        }
122    }
123
124    async fn write(&self, path: &str, args: OpWrite) -> Result<(RpWrite, Self::Writer)> {
125        Ok((
126            RpWrite::default(),
127            oio::OneShotWriter::new(DropboxWriter::new(
128                self.core.clone(),
129                args,
130                String::from(path),
131            )),
132        ))
133    }
134
135    async fn delete(&self) -> Result<(RpDelete, Self::Deleter)> {
136        Ok((
137            RpDelete::default(),
138            oio::OneShotDeleter::new(DropboxDeleter::new(self.core.clone())),
139        ))
140    }
141
142    async fn list(&self, path: &str, args: OpList) -> Result<(RpList, Self::Lister)> {
143        Ok((
144            RpList::default(),
145            oio::PageLister::new(DropboxLister::new(
146                self.core.clone(),
147                path.to_string(),
148                args.recursive(),
149                args.limit(),
150            )),
151        ))
152    }
153
154    async fn copy(&self, from: &str, to: &str, _: OpCopy) -> Result<RpCopy> {
155        let resp = self.core.dropbox_copy(from, to).await?;
156
157        let status = resp.status();
158
159        match status {
160            StatusCode::OK => Ok(RpCopy::default()),
161            _ => {
162                let err = parse_error(resp);
163                match err.kind() {
164                    ErrorKind::NotFound => Ok(RpCopy::default()),
165                    _ => Err(err),
166                }
167            }
168        }
169    }
170
171    async fn rename(&self, from: &str, to: &str, _: OpRename) -> Result<RpRename> {
172        let resp = self.core.dropbox_move(from, to).await?;
173
174        let status = resp.status();
175
176        match status {
177            StatusCode::OK => Ok(RpRename::default()),
178            _ => {
179                let err = parse_error(resp);
180                match err.kind() {
181                    ErrorKind::NotFound => Ok(RpRename::default()),
182                    _ => Err(err),
183                }
184            }
185        }
186    }
187}
opendal/services/dropbox/backend.rs

opendal/services/dropbox/
backend.rs
