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proxmox-backup
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proxmox-backup/src/api_server.rs

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move ApiConfig into extra file
2018-11-15 09:14:08 +00:00
use crate::json_schema::*;
use crate::api_info::*;
use crate::api_config::*;
rename ApiError into HttpError
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use std::fmt;
factor out server code into api_server.rs
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use std::path::{PathBuf};
move server code to api_server.rs, implement Service and NewService
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use std::sync::Arc;
use failure::*;
use serde_json::{json, Value};
use futures::future::{self, Either};
//use tokio::prelude::*;
//use tokio::timer::Delay;
use tokio::fs::File;
use tokio_codec;
//use bytes::{BytesMut, BufMut};
//use hyper::body::Payload;
use hyper::http::request::Parts;
avoid macros
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use hyper::{Body, Request, Response, StatusCode};
move server code to api_server.rs, implement Service and NewService
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use hyper::service::{Service, NewService};
use hyper::rt::{Future, Stream};
use hyper::header;
reorder content
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pub struct RestServer {
pub api_config: Arc<ApiConfig>,
}
impl RestServer {
pub fn new(api_config: ApiConfig) -> Self {
Self { api_config: Arc::new(api_config) }
}
}
impl NewService for RestServer
{
type ReqBody = Body;
type ResBody = Body;
type Error = hyper::Error;
type InitError = hyper::Error;
type Service = ApiService;
type Future = Box<Future<Item = Self::Service, Error = Self::InitError> + Send>;
fn new_service(&self) -> Self::Future {
Box::new(future::ok(ApiService { api_config: self.api_config.clone() }))
}
}
pub struct ApiService {
pub api_config: Arc<ApiConfig>,
}
impl Service for ApiService {
type ReqBody = Body;
type ResBody = Body;
type Error = hyper::Error;
type Future = Box<Future<Item = Response<Body>, Error = Self::Error> + Send>;
fn call(&mut self, req: Request<Self::ReqBody>) -> Self::Future {
Box::new(handle_request(self.api_config.clone(), req).then(|result| {
match result {
Ok(res) => Ok::<_, hyper::Error>(res),
Err(err) => {
rename ApiError into HttpError
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if let Some(apierr) = err.downcast_ref::<HttpError>() {
reorder content
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let mut resp = Response::new(Body::from(apierr.message.clone()));
*resp.status_mut() = apierr.code;
Ok(resp)
} else {
let mut resp = Response::new(Body::from(err.to_string()));
*resp.status_mut() = StatusCode::BAD_REQUEST;
Ok(resp)
}
}
}
}))
}
}
move server code to api_server.rs, implement Service and NewService
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type BoxFut = Box<Future<Item = Response<Body>, Error = failure::Error> + Send>;
rename ApiError into HttpError
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#[derive(Debug, Fail)]
pub struct HttpError {
pub code: StatusCode,
pub message: String,
}
impl HttpError {
pub fn new(code: StatusCode, message: String) -> Self {
HttpError { code, message }
}
}
impl fmt::Display for HttpError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Error {}: {}", self.code, self.message)
}
}
macro_rules! http_err {
($status:ident, $msg:expr) => {{
Error::from(HttpError::new(StatusCode::$status, $msg))
}}
}
remove unneeded lifetime annotations
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fn get_request_parameters_async(
info: &'static ApiMethod,
move server code to api_server.rs, implement Service and NewService
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parts: Parts,
req_body: Body,
remove unneeded lifetime annotations
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) -> Box<Future<Item = Value, Error = failure::Error> + Send>
move server code to api_server.rs, implement Service and NewService
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{
let resp = req_body
rename ApiError into HttpError
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.map_err(|err| http_err!(BAD_REQUEST, format!("Promlems reading request body: {}", err)))
move server code to api_server.rs, implement Service and NewService
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.fold(Vec::new(), |mut acc, chunk| {
if acc.len() + chunk.len() < 64*1024 { //fimxe: max request body size?
acc.extend_from_slice(&*chunk);
Ok(acc)
}
rename ApiError into HttpError
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else { Err(http_err!(BAD_REQUEST, format!("Request body too large"))) }
move server code to api_server.rs, implement Service and NewService
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})
.and_then(move |body| {
let bytes = String::from_utf8(body.to_vec())?; // why copy??
println!("GOT BODY {:?}", bytes);
let mut test_required = true;
let mut params = json!({});
if bytes.len() > 0 {
params = parse_query_string(&bytes, &info.parameters, true)?;
test_required = false;
}
if let Some(query_str) = parts.uri.query() {
let query_params = parse_query_string(query_str, &info.parameters, test_required)?;
for (k, v) in query_params.as_object().unwrap() {
params[k] = v.clone(); // fixme: why clone()??
}
}
println!("GOT PARAMS {}", params);
Ok(params)
});
Box::new(resp)
}
remove unneeded lifetime annotations
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fn handle_sync_api_request(
info: &'static ApiMethod,
move server code to api_server.rs, implement Service and NewService
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parts: Parts,
req_body: Body,
remove unneeded lifetime annotations
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) -> BoxFut
move server code to api_server.rs, implement Service and NewService
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{
let params = get_request_parameters_async(info, parts, req_body);
let resp = params
.and_then(move |params| {
println!("GOT PARAMS {}", params);
/*
let when = Instant::now() + Duration::from_millis(3000);
let task = Delay::new(when).then(|_| {
println!("A LAZY TASK");
ok(())
});
tokio::spawn(task);
*/
let res = (info.handler)(params, info)?;
Ok(res)
}).then(|result| {
match result {
Ok(ref value) => {
let json_str = value.to_string();
Ok(Response::builder()
.status(StatusCode::OK)
.header(header::CONTENT_TYPE, "application/json")
.body(Body::from(json_str))?)
}
avoid macros
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Err(err) => Err(http_err!(BAD_REQUEST, err.to_string()))
move server code to api_server.rs, implement Service and NewService
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}
});
Box::new(resp)
}
fn simple_static_file_download(filename: PathBuf) -> BoxFut {
Box::new(File::open(filename)
rename ApiError into HttpError
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.map_err(|err| http_err!(BAD_REQUEST, format!("File open failed: {}", err)))
move server code to api_server.rs, implement Service and NewService
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.and_then(|file| {
let buf: Vec<u8> = Vec::new();
tokio::io::read_to_end(file, buf)
rename ApiError into HttpError
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.map_err(|err| http_err!(BAD_REQUEST, format!("File read failed: {}", err)))
move server code to api_server.rs, implement Service and NewService
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.and_then(|data| Ok(Response::new(data.1.into())))
}))
}
fn chuncked_static_file_download(filename: PathBuf) -> BoxFut {
Box::new(File::open(filename)
rename ApiError into HttpError
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.map_err(|err| http_err!(BAD_REQUEST, format!("File open failed: {}", err)))
move server code to api_server.rs, implement Service and NewService
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.and_then(|file| {
let payload = tokio_codec::FramedRead::new(file, tokio_codec::BytesCodec::new()).
map(|bytes| {
//sigh - howto avoid copy here? or the whole map() ??
hyper::Chunk::from(bytes.to_vec())
});
let body = Body::wrap_stream(payload);
// fixme: set content type and other headers
Ok(Response::builder()
.status(StatusCode::OK)
.body(body)
.unwrap())
}))
}
fn handle_static_file_download(filename: PathBuf) -> BoxFut {
let response = tokio::fs::metadata(filename.clone())
rename ApiError into HttpError
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.map_err(|err| http_err!(BAD_REQUEST, format!("File access problems: {}", err)))
move server code to api_server.rs, implement Service and NewService
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.and_then(|metadata| {
if metadata.len() < 1024*32 {
Either::A(simple_static_file_download(filename))
} else {
Either::B(chuncked_static_file_download(filename))
}
});
return Box::new(response);
}
pub fn handle_request(api: Arc<ApiConfig>, req: Request<Body>) -> BoxFut {
let (parts, body) = req.into_parts();
let method = parts.method.clone();
let path = parts.uri.path();
// normalize path
// do not allow ".", "..", or hidden files ".XXXX"
// also remove empty path components
let items = path.split('/');
let mut path = String::new();
let mut components = vec![];
for name in items {
if name.is_empty() { continue; }
if name.starts_with(".") {
avoid macros
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return Box::new(future::err(http_err!(BAD_REQUEST, "Path contains illegal components.".to_string())));
move server code to api_server.rs, implement Service and NewService
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}
path.push('/');
path.push_str(name);
components.push(name);
}
let comp_len = components.len();
println!("REQUEST {} {}", method, path);
println!("COMPO {:?}", components);
if comp_len >= 1 && components[0] == "api3" {
println!("GOT API REQUEST");
if comp_len >= 2 {
let format = components[1];
if format != "json" {
avoid macros
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return Box::new(future::err(http_err!(BAD_REQUEST, format!("Unsupported output format '{}'.", format))))
move server code to api_server.rs, implement Service and NewService
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}
if let Some(api_method) = api.find_method(&components[2..], method) {
// fixme: handle auth
return handle_sync_api_request(api_method, parts, body);
}
}
} else {
// not Auth for accessing files!
let filename = api.find_alias(&components);
return handle_static_file_download(filename);
}
avoid macros
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Box::new(future::err(http_err!(NOT_FOUND, "Path not found.".to_string())))
move server code to api_server.rs, implement Service and NewService
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}