hoslo commented on code in PR #3604: URL: https://github.com/apache/incubator-opendal/pull/3604#discussion_r1398048948
########## core/src/services/b2/backend.rs: ########## @@ -0,0 +1,553 @@ +// 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 std::collections::HashMap; +use std::fmt::Debug; +use std::fmt::Formatter; +use std::sync::Arc; + +use async_trait::async_trait; +use http::Request; +use http::StatusCode; +use log::debug; +use serde::Deserialize; +use tokio::sync::Mutex; + +use crate::raw::*; +use crate::services::b2::core::B2Signer; +use crate::services::b2::core::ListFileNamesResponse; +use crate::*; + +use super::core::constants; +use super::core::B2Core; +use super::error::parse_error; +use super::lister::B2Lister; +use super::writer::B2Writer; +use super::writer::B2Writers; + +/// Config for backblaze b2 services support. +#[derive(Default, Deserialize)] +#[serde(default)] +#[non_exhaustive] +pub struct B2Config { + /// root of this backend. + /// + /// All operations will happen under this root. + pub root: Option<String>, + /// keyID of this backend. + /// + /// - If key_id is set, we will take user's input first. + /// - If not, we will try to load it from environment. + pub key_id: Option<String>, + /// applicationKey of this backend. + /// + /// - If application_key is set, we will take user's input first. + /// - If not, we will try to load it from environment. + pub application_key: Option<String>, + /// bucket of this backend. + /// + /// required. + pub bucket: String, + /// bucket id of this backend. + /// + /// required. + pub bucket_id: String, +} + +impl Debug for B2Config { + fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result { + let mut d = f.debug_struct("B2Config"); + + d.field("root", &self.root) + .field("key_id", &self.key_id) + .field("application_key", &self.application_key) + .field("bucket", &self.bucket); + + d.finish_non_exhaustive() + } +} + +/// [b2](https://www.backblaze.com/cloud-storage) services support. +#[doc = include_str!("docs.md")] +#[derive(Default)] +pub struct B2Builder { + config: B2Config, + + http_client: Option<HttpClient>, +} + +impl Debug for B2Builder { + fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result { + let mut d = f.debug_struct("AlluxioBuilder"); + + d.field("config", &self.config); + d.finish_non_exhaustive() + } +} + +impl B2Builder { + /// Set root of this backend. + /// + /// All operations will happen under this root. + pub fn root(&mut self, root: &str) -> &mut Self { + self.config.root = if root.is_empty() { + None + } else { + Some(root.to_string()) + }; + + self + } + + /// key_id of this backend. + pub fn key_id(&mut self, key_id: &str) -> &mut Self { + self.config.key_id = if key_id.is_empty() { + None + } else { + Some(key_id.to_string()) + }; + + self + } + + /// application_key of this backend. + pub fn application_key(&mut self, application_key: &str) -> &mut Self { + self.config.application_key = if application_key.is_empty() { + None + } else { + Some(application_key.to_string()) + }; + + self + } + + /// Set bucket name of this backend. + pub fn bucket(&mut self, bucket: &str) -> &mut Self { + self.config.bucket = bucket.to_string(); + + self + } + + /// Set bucket id of this backend. + pub fn bucket_id(&mut self, bucket_id: &str) -> &mut Self { + self.config.bucket_id = bucket_id.to_string(); + + self + } + + /// Specify the http client that used by this service. + /// + /// # Notes + /// + /// This API is part of OpenDAL's Raw API. `HttpClient` could be changed + /// during minor updates. + pub fn http_client(&mut self, client: HttpClient) -> &mut Self { + self.http_client = Some(client); + self + } +} + +impl Builder for B2Builder { + const SCHEME: Scheme = Scheme::B2; + type Accessor = B2Backend; + + /// Converts a HashMap into an B2Builder instance. + /// + /// # Arguments + /// + /// * `map` - A HashMap containing the configuration values. + /// + /// # Returns + /// + /// Returns an instance of B2Builder. + fn from_map(map: HashMap<String, String>) -> Self { + // Deserialize the configuration from the HashMap. + let config = B2Config::deserialize(ConfigDeserializer::new(map)) + .expect("config deserialize must succeed"); + + // Create an B2Builder instance with the deserialized config. + B2Builder { + config, + http_client: None, + } + } + + /// Builds the backend and returns the result of B2Backend. + fn build(&mut self) -> Result<Self::Accessor> { + debug!("backend build started: {:?}", &self); + + let root = normalize_root(&self.config.root.clone().unwrap_or_default()); + debug!("backend use root {}", &root); + + // Handle bucket. + if self.config.bucket.is_empty() { + return Err(Error::new(ErrorKind::ConfigInvalid, "bucket is empty") + .with_operation("Builder::build") + .with_context("service", Scheme::B2)); + } + + debug!("backend use bucket {}", &self.config.bucket); + + // Handle bucket_id. + if self.config.bucket_id.is_empty() { + return Err(Error::new(ErrorKind::ConfigInvalid, "bucket_id is empty") + .with_operation("Builder::build") + .with_context("service", Scheme::B2)); + } + + debug!("backend bucket_id {}", &self.config.bucket_id); + + let key_id = match &self.config.key_id { + Some(key_id) => Ok(key_id.clone()), + None => Err(Error::new(ErrorKind::ConfigInvalid, "bucket_id is empty") + .with_operation("Builder::build") + .with_context("service", Scheme::B2)), + }?; + + let application_key = match &self.config.application_key { + Some(key_id) => Ok(key_id.clone()), + None => Err( + Error::new(ErrorKind::ConfigInvalid, "application_key is empty") + .with_operation("Builder::build") + .with_context("service", Scheme::B2), + ), + }?; + + let client = if let Some(client) = self.http_client.take() { + client + } else { + HttpClient::new().map_err(|err| { + err.with_operation("Builder::build") + .with_context("service", Scheme::Alluxio) + })? + }; + + let cluster_number = key_id[0..3].to_string(); + + let api_url = format!("https://api{}.backblazeb2.com";, cluster_number); + let download_url = format!("https://f{}.backblazeb2.com";, cluster_number); + + let signer = B2Signer { + key_id, + application_key, + ..Default::default() + }; + + Ok(B2Backend { + core: Arc::new(B2Core { + signer: Arc::new(Mutex::new(signer)), + root, + api_url, + download_url, + + bucket: self.config.bucket.clone(), + bucket_id: self.config.bucket_id.clone(), + client, + }), + }) + } +} + +/// Backend for s3 services. +#[derive(Debug, Clone)] +pub struct B2Backend { + core: Arc<B2Core>, +} + +#[async_trait] +impl Accessor for B2Backend { + type Reader = IncomingAsyncBody; + + type BlockingReader = (); + + type Writer = B2Writers; + + type BlockingWriter = (); + + type Lister = oio::PageLister<B2Lister>; + + type BlockingLister = (); + + fn info(&self) -> AccessorInfo { + let mut am = AccessorInfo::default(); + am.set_scheme(Scheme::B2) + .set_root(&self.core.root) + .set_native_capability(Capability { + stat: true, + + read: true, + read_can_next: true, + read_with_range: true, + read_with_if_match: false, Review Comment: fixed -- This is an automated message from the Apache Git Service. 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