3b62116ce6
same as the sync ReadChunk but uses tokio::fs::read instead of file_get_contents Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
106 lines
2.9 KiB
Rust
106 lines
2.9 KiB
Rust
use std::future::Future;
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use std::pin::Pin;
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use std::sync::Arc;
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use anyhow::Error;
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use super::crypt_config::CryptConfig;
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use super::data_blob::DataBlob;
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use super::datastore::DataStore;
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/// The ReadChunk trait allows reading backup data chunks (local or remote)
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pub trait ReadChunk {
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/// Returns the encoded chunk data
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fn read_raw_chunk(&mut self, digest: &[u8; 32]) -> Result<DataBlob, Error>;
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/// Returns the decoded chunk data
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fn read_chunk(&mut self, digest: &[u8; 32]) -> Result<Vec<u8>, Error>;
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}
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pub struct LocalChunkReader {
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store: Arc<DataStore>,
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crypt_config: Option<Arc<CryptConfig>>,
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}
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impl LocalChunkReader {
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pub fn new(store: Arc<DataStore>, crypt_config: Option<Arc<CryptConfig>>) -> Self {
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Self {
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store,
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crypt_config,
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}
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}
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}
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impl ReadChunk for LocalChunkReader {
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fn read_raw_chunk(&mut self, digest: &[u8; 32]) -> Result<DataBlob, Error> {
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let digest_str = proxmox::tools::digest_to_hex(digest);
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println!("READ CHUNK {}", digest_str);
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let (path, _) = self.store.chunk_path(digest);
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let raw_data = proxmox::tools::fs::file_get_contents(&path)?;
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let chunk = DataBlob::from_raw(raw_data)?;
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chunk.verify_crc()?;
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Ok(chunk)
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}
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fn read_chunk(&mut self, digest: &[u8; 32]) -> Result<Vec<u8>, Error> {
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let chunk = ReadChunk::read_raw_chunk(self, digest)?;
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let raw_data = chunk.decode(self.crypt_config.as_ref().map(Arc::as_ref))?;
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// fixme: verify digest?
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Ok(raw_data)
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}
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}
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pub trait AsyncReadChunk: Send {
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/// Returns the encoded chunk data
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fn read_raw_chunk<'a>(
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&'a mut self,
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digest: &'a [u8; 32],
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) -> Pin<Box<dyn Future<Output = Result<DataBlob, Error>> + Send + 'a>>;
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/// Returns the decoded chunk data
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fn read_chunk<'a>(
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&'a mut self,
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digest: &'a [u8; 32],
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) -> Pin<Box<dyn Future<Output = Result<Vec<u8>, Error>> + Send + 'a>>;
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}
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impl AsyncReadChunk for LocalChunkReader {
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fn read_raw_chunk<'a>(
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&'a mut self,
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digest: &'a [u8; 32],
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) -> Pin<Box<dyn Future<Output = Result<DataBlob, Error>> + Send + 'a>> {
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Box::pin(async move{
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let digest_str = proxmox::tools::digest_to_hex(digest);
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println!("READ CHUNK {}", digest_str);
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let (path, _) = self.store.chunk_path(digest);
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let raw_data = tokio::fs::read(&path).await?;
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let chunk = DataBlob::from_raw(raw_data)?;
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chunk.verify_crc()?;
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Ok(chunk)
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})
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}
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fn read_chunk<'a>(
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&'a mut self,
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digest: &'a [u8; 32],
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) -> Pin<Box<dyn Future<Output = Result<Vec<u8>, Error>> + Send + 'a>> {
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Box::pin(async move {
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let chunk = AsyncReadChunk::read_raw_chunk(self, digest).await?;
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let raw_data = chunk.decode(self.crypt_config.as_ref().map(Arc::as_ref))?;
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// fixme: verify digest?
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Ok(raw_data)
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})
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}
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}
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