Young-Flash commented on code in PR #2184: URL: https://github.com/apache/incubator-opendal/pull/2184#discussion_r1181587173
########## core/src/services/gdrive/backend.rs: ########## @@ -0,0 +1,241 @@ +// 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. + +use async_trait::async_trait; +use http::{header, Request, Response, StatusCode}; +use std::fmt::Debug; + +use crate::{ + ops::{OpDelete, OpRead, OpWrite}, + raw::{ + build_rooted_abs_path, new_request_build_error, parse_into_metadata, Accessor, + AccessorInfo, AsyncBody, HttpClient, IncomingAsyncBody, RpDelete, RpRead, RpWrite, + }, + types::Result, + Capability, Error, ErrorKind, +}; + +use super::{error::parse_error, writer::GoogleDriveWriter}; + +#[derive(Clone)] +pub struct GoogleDriveBackend { + root: String, + access_token: String, + client: HttpClient, +} + +impl GoogleDriveBackend { + pub(crate) fn new(root: String, access_token: String, http_client: HttpClient) -> Self { + GoogleDriveBackend { + root, + access_token, + client: http_client, + } + } +} + +impl Debug for GoogleDriveBackend { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + let mut de = f.debug_struct("GoolgeDriveBackend"); + de.field("root", &self.root); + de.finish() + } +} + +#[async_trait] +impl Accessor for GoogleDriveBackend { + type Reader = IncomingAsyncBody; + type BlockingReader = (); + type Writer = GoogleDriveWriter; + type BlockingWriter = (); + type Pager = (); + type BlockingPager = (); + + fn info(&self) -> AccessorInfo { + let mut ma = AccessorInfo::default(); + ma.set_scheme(crate::Scheme::GDrive) + .set_root(&self.root) + .set_capability(Capability { + read: true, + write: true, + delete: true, + ..Default::default() + }); + + ma + } + + async fn read(&self, path: &str, _args: OpRead) -> Result<(RpRead, Self::Reader)> { + let resp = self.gdrive_get(path).await?; + + let status = resp.status(); + + match status { + StatusCode::OK => { + let meta = parse_into_metadata(path, resp.headers())?; + Ok((RpRead::with_metadata(meta), resp.into_body())) + } + _ => Err(parse_error(resp).await?), + } + } + + async fn write(&self, path: &str, args: OpWrite) -> Result<(RpWrite, Self::Writer)> { + if args.content_length().is_none() { + return Err(Error::new( + ErrorKind::Unsupported, + "write without content length is not supported", + )); + } + + Ok(( + RpWrite::default(), + GoogleDriveWriter::new(self.clone(), args, String::from(path)), + )) + } + + async fn delete(&self, path: &str, _: OpDelete) -> Result<RpDelete> { + let resp = self.gdrive_delete(path).await?; + + let status = resp.status(); + + match status { + StatusCode::NO_CONTENT => Ok(RpDelete::default()), + _ => Err(parse_error(resp).await?), + } + } +} + +impl GoogleDriveBackend { + async fn get_abs_root_id(&self) -> String { + let mut req = Request::get("https://www.googleapis.com/drive/v3/files/root";); + let auth_header_content = format!("Bearer {}", self.access_token); + req = req.header(header::AUTHORIZATION, auth_header_content); + let req = req + .body(AsyncBody::Empty) + .map_err(new_request_build_error) + .unwrap(); + + let resp = self.client.send(req).await.unwrap(); + + let body_value: serde_json::Value = + serde_json::from_slice(&resp.into_body().bytes().await.unwrap()).unwrap(); + let root_id = String::from(body_value["id"].as_str().unwrap_or_default()); + root_id + } + + async fn get_file_id_by_path(&self, file_path: &str) -> String { + let path = build_rooted_abs_path(&self.root, file_path); + let auth_header_content = format!("Bearer {}", self.access_token); + + let mut parent_id = self.get_abs_root_id().await; + let file_path_items: Vec<&str> = path.split('/').filter(|&x| !x.is_empty()).collect(); + + for (i, item) in file_path_items.iter().enumerate() { + let mut query = format!( + "name = '{}' and parents = '{}' and trashed = false", + item, parent_id + ); + if i != file_path_items.len() - 1 { + query += "and mimeType = 'application/vnd.google-apps.folder'"; + } + let query: String = query.chars().filter(|c| !c.is_whitespace()).collect(); + + let mut req = Request::get(format!( + "https://www.googleapis.com/drive/v3/files?q={}";, + query + )); + req = req.header(header::AUTHORIZATION, &auth_header_content); + let req = req + .body(AsyncBody::default()) + .map_err(new_request_build_error) + .unwrap(); + + let resp = self.client.send(req).await.unwrap(); + + let body_value: serde_json::Value = + serde_json::from_slice(&resp.into_body().bytes().await.unwrap()).unwrap(); + parent_id = String::from(body_value["files"][0]["id"].as_str().unwrap()); + } + + parent_id + } + + async fn gdrive_get(&self, path: &str) -> Result<Response<IncomingAsyncBody>> { + let url: String = format!( + "https://www.googleapis.com/drive/v3/files/{}?alt=media";, + self.get_file_id_by_path(path).await + ); + + let auth_header_content = format!("Bearer {}", self.access_token); + let mut req = Request::get(&url); + req = req.header(header::AUTHORIZATION, auth_header_content); Review Comment: leave to next PR -- This is an automated message from the Apache Git Service. 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