40 lines
1.0 KiB
Rust
40 lines
1.0 KiB
Rust
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use failure::*;
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use futures::future::Future;
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use std::sync::Arc;
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use super::BackupReader;
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use crate::backup::{ReadChunk, DataChunk, CryptConfig};
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/// Read chunks from remote host using ``BackupReader``
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pub struct RemoteChunkReader {
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client: Arc<BackupReader>,
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crypt_config: Option<Arc<CryptConfig>>,
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}
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impl RemoteChunkReader {
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pub fn new(client: Arc<BackupReader>, crypt_config: Option<Arc<CryptConfig>>) -> Self {
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Self { client, crypt_config }
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}
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}
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impl ReadChunk for RemoteChunkReader {
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fn read_chunk(&mut self, digest:&[u8; 32]) -> Result<Vec<u8>, Error> {
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let writer = Vec::with_capacity(4*1024*1024);
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let chunk_data = self.client.download_chunk(&digest, writer).wait()?;
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let chunk = DataChunk::from_raw(chunk_data, *digest)?;
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chunk.verify_crc()?;
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let raw_data = match self.crypt_config {
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Some(ref crypt_config) => chunk.decode(Some(crypt_config))?,
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None => chunk.decode(None)?,
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};
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Ok(raw_data)
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}
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}
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