proxmox-backup/src/api2/reader.rs

192 lines
6.1 KiB
Rust
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use failure::*;
use lazy_static::lazy_static;
use std::sync::Arc;
use futures::*;
use hyper::header::{self, HeaderValue, UPGRADE};
use hyper::{Body, Response, StatusCode};
use hyper::http::request::Parts;
//use chrono::{Local, TimeZone};
use serde_json::Value;
use crate::tools;
use crate::api_schema::router::*;
use crate::api_schema::*;
use crate::server::{WorkerTask, H2Service};
use crate::backup::*;
//use crate::api2::types::*;
mod environment;
use environment::*;
pub fn router() -> Router {
Router::new()
.upgrade(api_method_upgrade_backup())
}
pub fn api_method_upgrade_backup() -> ApiAsyncMethod {
ApiAsyncMethod::new(
upgrade_to_backup_reader_protocol,
ObjectSchema::new(concat!("Upgraded to backup protocol ('", PROXMOX_BACKUP_READER_PROTOCOL_ID_V1!(), "')."))
.required("store", StringSchema::new("Datastore name."))
.required("backup-type", StringSchema::new("Backup type.")
.format(Arc::new(ApiStringFormat::Enum(&["vm", "ct", "host"]))))
.required("backup-id", StringSchema::new("Backup ID."))
.required("backup-time", IntegerSchema::new("Backup time (Unix epoch.)")
.minimum(1547797308))
.optional("debug", BooleanSchema::new("Enable verbose debug logging."))
)
}
fn upgrade_to_backup_reader_protocol(
parts: Parts,
req_body: Body,
param: Value,
_info: &ApiAsyncMethod,
rpcenv: Box<dyn RpcEnvironment>,
) -> Result<BoxFut, Error> {
let debug = param["debug"].as_bool().unwrap_or(false);
let store = tools::required_string_param(&param, "store")?.to_owned();
let datastore = DataStore::lookup_datastore(&store)?;
let backup_type = tools::required_string_param(&param, "backup-type")?;
let backup_id = tools::required_string_param(&param, "backup-id")?;
let backup_time = tools::required_integer_param(&param, "backup-time")?;
let protocols = parts
.headers
.get("UPGRADE")
.ok_or_else(|| format_err!("missing Upgrade header"))?
.to_str()?;
if protocols != PROXMOX_BACKUP_READER_PROTOCOL_ID_V1!() {
bail!("invalid protocol name");
}
if parts.version >= http::version::Version::HTTP_2 {
bail!("unexpected http version '{:?}' (expected version < 2)", parts.version);
}
let username = rpcenv.get_user().unwrap();
let env_type = rpcenv.env_type();
let backup_dir = BackupDir::new(backup_type, backup_id, backup_time);
let path = datastore.base_path();
//let files = BackupInfo::list_files(&path, &backup_dir)?;
let worker_id = format!("{}_{}_{}_{:08X}", store, backup_type, backup_id, backup_dir.backup_time().timestamp());
WorkerTask::spawn("reader", Some(worker_id), &username.clone(), true, move |worker| {
let mut env = ReaderEnvironment::new(
env_type, username.clone(), worker.clone(), datastore, backup_dir);
env.debug = debug;
env.log(format!("starting new backup reader datastore '{}': {:?}", store, path));
let service = H2Service::new(env.clone(), worker.clone(), &READER_ROUTER, debug);
let abort_future = worker.abort_future();
let env3 = env.clone();
req_body
.on_upgrade()
.map_err(Error::from)
.and_then(move |conn| {
env3.debug("protocol upgrade done");
let mut http = hyper::server::conn::Http::new();
http.http2_only(true);
// increase window size: todo - find optiomal size
let window_size = 32*1024*1024; // max = (1 << 31) - 2
http.http2_initial_stream_window_size(window_size);
http.http2_initial_connection_window_size(window_size);
http.serve_connection(conn, service)
.map_err(Error::from)
})
.select(abort_future.map_err(|_| {}).then(move |_| { bail!("task aborted"); }))
.map_err(|(err, _)| err)
.and_then(move |(_result, _)| {
env.log("reader finished sucessfully");
Ok(())
})
})?;
let response = Response::builder()
.status(StatusCode::SWITCHING_PROTOCOLS)
.header(UPGRADE, HeaderValue::from_static(PROXMOX_BACKUP_READER_PROTOCOL_ID_V1!()))
.body(Body::empty())?;
Ok(Box::new(futures::future::ok(response)))
}
lazy_static!{
static ref READER_ROUTER: Router = reader_api();
}
pub fn reader_api() -> Router {
let router = Router::new()
.subdir(
"download", Router::new()
.download(api_method_download_file())
);
router
}
pub fn api_method_download_file() -> ApiAsyncMethod {
ApiAsyncMethod::new(
download_file,
ObjectSchema::new("Download specified file.")
.required("file-name", crate::api2::types::BACKUP_ARCHIVE_NAME_SCHEMA.clone())
)
}
fn download_file(
_parts: Parts,
_req_body: Body,
param: Value,
_info: &ApiAsyncMethod,
rpcenv: Box<dyn RpcEnvironment>,
) -> Result<BoxFut, Error> {
let env: &ReaderEnvironment = rpcenv.as_ref();
let env2 = env.clone();
let file_name = tools::required_string_param(&param, "file-name")?.to_owned();
let mut path = env.datastore.base_path();
path.push(env.backup_dir.relative_path());
path.push(&file_name);
let path2 = path.clone();
let path3 = path.clone();
let response_future = tokio::fs::File::open(path)
.map_err(move |err| http_err!(BAD_REQUEST, format!("open file {:?} failed: {}", path2, err)))
.and_then(move |file| {
env2.log(format!("download {:?}", path3));
let payload = tokio::codec::FramedRead::new(file, tokio::codec::BytesCodec::new()).
2019-06-28 05:07:52 +00:00
map(|bytes| hyper::Chunk::from(bytes.freeze()));
let body = Body::wrap_stream(payload);
// fixme: set other headers ?
Ok(Response::builder()
.status(StatusCode::OK)
.header(header::CONTENT_TYPE, "application/octet-stream")
.body(body)
.unwrap())
});
Ok(Box::new(response_future))
}