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use crate::chunk::DataChunk;
use crate::chunk::GenerationChunk;
use crate::chunker::Chunker;
use crate::chunkid::ChunkId;
use crate::chunkmeta::ChunkMeta;
use crate::fsentry::{FilesystemEntry, FilesystemKind};
use log::{debug, error, info, trace};
use reqwest::blocking::Client;
use serde::Deserialize;
use std::collections::HashMap;
use std::path::{Path, PathBuf};
#[derive(Debug, Deserialize, Clone)]
pub struct ClientConfig {
pub server_name: String,
pub server_port: u16,
pub dbname: PathBuf,
pub root: PathBuf,
}
impl ClientConfig {
pub fn read_config(filename: &Path) -> anyhow::Result<Self> {
trace!("read_config: filename={:?}", filename);
let config = std::fs::read_to_string(filename)?;
let config = serde_yaml::from_str(&config)?;
Ok(config)
}
}
#[derive(Debug, thiserror::Error)]
pub enum ClientError {
#[error("Server successful response to creating chunk lacked chunk id")]
NoCreatedChunkId,
}
pub struct BackupClient {
client: Client,
base_url: String,
}
impl BackupClient {
pub fn new(host: &str, port: u16) -> anyhow::Result<Self> {
let client = Client::builder()
.danger_accept_invalid_certs(true)
.build()?;
let base_url = format!("http://{}:{}/chunks", host, port,);
Ok(Self { client, base_url })
}
pub fn upload_filesystem_entry(
&self,
e: FilesystemEntry,
size: usize,
) -> anyhow::Result<(FilesystemEntry, Vec<ChunkId>)> {
let ids = match e.kind() {
FilesystemKind::Regular => self.read_file(e.path(), size)?,
FilesystemKind::Directory => vec![],
};
Ok((e, ids))
}
pub fn upload_generation(&self, filename: &Path, size: usize) -> anyhow::Result<ChunkId> {
let ids = self.read_file(filename, size)?;
let gen = GenerationChunk::new(ids);
let meta = ChunkMeta::new_generation("checksum", "endtime");
let gen_id = self.upload_gen_chunk(meta, gen)?;
Ok(gen_id)
}
fn read_file(&self, filename: &Path, size: usize) -> anyhow::Result<Vec<ChunkId>> {
info!("uploading {}", filename.display());
let file = std::fs::File::open(filename)?;
let chunker = Chunker::new(size, file);
let chunk_ids = self.upload_new_file_chunks(chunker)?;
Ok(chunk_ids)
}
fn base_url(&self) -> &str {
&self.base_url
}
pub fn has_chunk(&self, meta: &ChunkMeta) -> anyhow::Result<Option<ChunkId>> {
trace!("has_chunk: url={:?}", self.base_url());
let req = self
.client
.get(self.base_url())
.query(&[("sha256", meta.sha256())])
.build()?;
let res = self.client.execute(req)?;
debug!("has_chunk: status={}", res.status());
let has = if res.status() != 200 {
debug!("has_chunk: error from server");
None
} else {
let text = res.text()?;
debug!("has_chunk: text={:?}", text);
let hits: HashMap<String, ChunkMeta> = serde_json::from_str(&text)?;
debug!("has_chunk: hits={:?}", hits);
let mut iter = hits.iter();
if let Some((chunk_id, _)) = iter.next() {
debug!("has_chunk: chunk_id={:?}", chunk_id);
Some(chunk_id.into())
} else {
None
}
};
Ok(has)
}
pub fn upload_chunk(&self, meta: ChunkMeta, chunk: DataChunk) -> anyhow::Result<ChunkId> {
let res = self
.client
.post(self.base_url())
.header("chunk-meta", meta.to_json())
.body(chunk.data().to_vec())
.send()?;
debug!("upload_chunk: res={:?}", res);
let res: HashMap<String, String> = res.json()?;
let chunk_id = if let Some(chunk_id) = res.get("chunk_id") {
debug!("upload_chunk: id={}", chunk_id);
chunk_id.parse().unwrap()
} else {
return Err(ClientError::NoCreatedChunkId.into());
};
Ok(chunk_id)
}
pub fn upload_gen_chunk(
&self,
meta: ChunkMeta,
gen: GenerationChunk,
) -> anyhow::Result<ChunkId> {
let res = self
.client
.post(self.base_url())
.header("chunk-meta", meta.to_json())
.body(serde_json::to_string(&gen)?)
.send()?;
debug!("upload_chunk: res={:?}", res);
let res: HashMap<String, String> = res.json()?;
let chunk_id = if let Some(chunk_id) = res.get("chunk_id") {
debug!("upload_chunk: id={}", chunk_id);
chunk_id.parse().unwrap()
} else {
return Err(ClientError::NoCreatedChunkId.into());
};
Ok(chunk_id)
}
pub fn upload_new_file_chunks(&self, chunker: Chunker) -> anyhow::Result<Vec<ChunkId>> {
let mut chunk_ids = vec![];
for item in chunker {
let (meta, chunk) = item?;
if let Some(chunk_id) = self.has_chunk(&meta)? {
chunk_ids.push(chunk_id);
} else {
let chunk_id = self.upload_chunk(meta, chunk)?;
chunk_ids.push(chunk_id);
}
}
Ok(chunk_ids)
}
pub fn list_generations(&self) -> anyhow::Result<Vec<ChunkId>> {
Ok(vec![])
}
}
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