tyler
/
proxmox-backup
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
proxmox-backup/src/api_server.rs

344 lines
10 KiB
Rust
Raw Normal View History

factor out server code into api_server.rs
2018-11-14 12:22:33 +00:00
use std::collections::HashMap;
use std::path::{PathBuf};
move server code to api_server.rs, implement Service and NewService
2018-11-15 07:18:48 +00:00
use std::sync::Arc;
use failure::*;
use serde_json::{json, Value};
use crate::json_schema::*;
factor out server code into api_server.rs
2018-11-14 12:22:33 +00:00
use crate::api_info::*;
move server code to api_server.rs, implement Service and NewService
2018-11-15 07:18:48 +00:00
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;
use hyper::{Body, Request, Method, Response, StatusCode};
use hyper::service::{Service, NewService};
use hyper::rt::{Future, Stream};
use hyper::header;
pub struct ApiConfig {
factor out server code into api_server.rs
2018-11-14 12:22:33 +00:00
basedir: PathBuf,
router: &'static MethodInfo,
aliases: HashMap<String, PathBuf>,
}
move server code to api_server.rs, implement Service and NewService
2018-11-15 07:18:48 +00:00
impl ApiConfig {
factor out server code into api_server.rs
2018-11-14 12:22:33 +00:00
pub fn new<B: Into<PathBuf>>(basedir: B, router: &'static MethodInfo) -> Self {
move server code to api_server.rs, implement Service and NewService
2018-11-15 07:18:48 +00:00
Self {
factor out server code into api_server.rs
2018-11-14 12:22:33 +00:00
basedir: basedir.into(),
router: router,
aliases: HashMap::new(),
}
}
pub fn find_method(&self, components: &[&str], method: Method) -> Option<&'static ApiMethod> {
if let Some(info) = self.router.find_route(components) {
println!("FOUND INFO");
let opt_api_method = match method {
Method::GET => &info.get,
Method::PUT => &info.put,
Method::POST => &info.post,
Method::DELETE => &info.delete,
_ => &None,
};
if let Some(api_method) = opt_api_method {
return Some(&api_method);
}
}
None
}
pub fn find_alias(&self, components: &[&str]) -> PathBuf {
let mut prefix = String::new();
let mut filename = self.basedir.clone();
let comp_len = components.len();
if comp_len >= 1 {
prefix.push_str(components[0]);
if let Some(subdir) = self.aliases.get(&prefix) {
filename.push(subdir);
for i in 1..comp_len { filename.push(components[i]) }
}
}
filename
}
pub fn add_alias<S, P>(&mut self, alias: S, path: P)
where S: Into<String>,
P: Into<PathBuf>,
{
self.aliases.insert(alias.into(), path.into());
}
}
move server code to api_server.rs, implement Service and NewService
2018-11-15 07:18:48 +00:00
type BoxFut = Box<Future<Item = Response<Body>, Error = failure::Error> + Send>;
macro_rules! error_response {
($status:ident, $msg:expr) => {{
let mut resp = Response::new(Body::from($msg));
*resp.status_mut() = StatusCode::$status;
resp
}}
}
macro_rules! http_error_future {
($status:ident, $msg:expr) => {{
let resp = error_response!($status, $msg);
return Box::new(future::ok(resp));
}}
}
fn get_request_parameters_async<'a>(
info: &'a ApiMethod,
parts: Parts,
req_body: Body,
) -> Box<Future<Item = Value, Error = failure::Error> + Send + 'a>
{
let resp = req_body
.map_err(|err| Error::from(ApiError::new(StatusCode::BAD_REQUEST, format!("Promlems reading request body: {}", err))))
.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)
}
else { Err(Error::from(ApiError::new(StatusCode::BAD_REQUEST, format!("Request body too large")))) }
})
.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)
}
fn handle_sync_api_request<'a>(
info: &'a ApiMethod,
parts: Parts,
req_body: Body,
) -> Box<Future<Item = Response<Body>, Error = failure::Error> + Send + 'a>
{
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))?)
}
Err(err) => Ok(error_response!(BAD_REQUEST, err.to_string()))
}
});
Box::new(resp)
}
fn simple_static_file_download(filename: PathBuf) -> BoxFut {
Box::new(File::open(filename)
.map_err(|err| Error::from(ApiError::new(StatusCode::BAD_REQUEST, format!("File open failed: {}", err))))
.and_then(|file| {
let buf: Vec<u8> = Vec::new();
tokio::io::read_to_end(file, buf)
.map_err(|err| Error::from(ApiError::new(StatusCode::BAD_REQUEST, format!("File read failed: {}", err))))
.and_then(|data| Ok(Response::new(data.1.into())))
}))
}
fn chuncked_static_file_download(filename: PathBuf) -> BoxFut {
Box::new(File::open(filename)
.map_err(|err| Error::from(ApiError::new(StatusCode::BAD_REQUEST, format!("File open failed: {}", err))))
.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())
.map_err(|err| Error::from(ApiError::new(StatusCode::BAD_REQUEST, format!("File access problems: {}", err))))
.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(".") {
http_error_future!(BAD_REQUEST, "Path contains illegal components.\n");
}
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" {
http_error_future!(BAD_REQUEST, format!("Unsupported output format '{}'.", format))
}
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);
}
http_error_future!(NOT_FOUND, "Path not found.")
//Box::new(ok(Response::new(Body::from("RETURN WEB GUI\n"))))
}
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) => {
if let Some(apierr) = err.downcast_ref::<ApiError>() {
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)
}
}
}
}))
}
}