dufs/src/server.rs

754 lines
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Rust
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use crate::{Args, BoxResult};
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use async_walkdir::WalkDir;
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use async_zip::read::seek::ZipFileReader;
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use async_zip::write::{EntryOptions, ZipFileWriter};
use async_zip::Compression;
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use chrono::Local;
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use futures::stream::StreamExt;
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use futures::TryStreamExt;
use get_if_addrs::get_if_addrs;
use headers::{
AcceptRanges, AccessControlAllowHeaders, AccessControlAllowOrigin, ContentLength, ContentRange,
ContentType, ETag, HeaderMap, HeaderMapExt, IfModifiedSince, IfNoneMatch, IfRange,
LastModified, Range,
};
use hyper::header::{
HeaderValue, ACCEPT, AUTHORIZATION, CONTENT_DISPOSITION, CONTENT_TYPE, ORIGIN, RANGE,
WWW_AUTHENTICATE,
};
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use hyper::service::{make_service_fn, service_fn};
use hyper::{Body, Method, StatusCode};
use percent_encoding::percent_decode;
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use rustls::ServerConfig;
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use serde::Serialize;
use std::convert::Infallible;
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use std::fs::Metadata;
use std::net::IpAddr;
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use std::path::{Path, PathBuf};
use std::sync::Arc;
use std::time::SystemTime;
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use tokio::fs::File;
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use tokio::io::{AsyncReadExt, AsyncSeekExt, AsyncWrite};
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use tokio::net::TcpListener;
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use tokio::{fs, io};
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use tokio_rustls::TlsAcceptor;
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use tokio_util::codec::{BytesCodec, FramedRead};
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use tokio_util::io::{ReaderStream, StreamReader};
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type Request = hyper::Request<Body>;
type Response = hyper::Response<Body>;
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const INDEX_HTML: &str = include_str!("../assets/index.html");
const INDEX_CSS: &str = include_str!("../assets/index.css");
const INDEX_JS: &str = include_str!("../assets/index.js");
const INDEX_NAME: &str = "index.html";
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const BUF_SIZE: usize = 1024 * 16;
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macro_rules! status {
($res:ident, $status:expr) => {
*$res.status_mut() = $status;
*$res.body_mut() = Body::from($status.canonical_reason().unwrap_or_default());
};
}
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pub async fn serve(args: Args) -> BoxResult<()> {
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let args = Arc::new(args);
let socket_addr = args.address()?;
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let inner = Arc::new(InnerService::new(args.clone()));
if let Some((certs, key)) = args.tls.as_ref() {
let config = ServerConfig::builder()
.with_safe_defaults()
.with_no_client_auth()
.with_single_cert(certs.clone(), key.clone())?;
let tls_acceptor = TlsAcceptor::from(Arc::new(config));
let arc_acceptor = Arc::new(tls_acceptor);
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let listener = TcpListener::bind(&socket_addr).await?;
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let incoming = tokio_stream::wrappers::TcpListenerStream::new(listener);
let incoming = hyper::server::accept::from_stream(incoming.filter_map(|socket| async {
match socket {
Ok(stream) => match arc_acceptor.clone().accept(stream).await {
Ok(val) => Some(Ok::<_, Infallible>(val)),
Err(_) => None,
},
Err(_) => None,
}
}));
let server = hyper::Server::builder(incoming).serve(make_service_fn(move |_| {
let inner = inner.clone();
async move {
Ok::<_, Infallible>(service_fn(move |req| {
let inner = inner.clone();
inner.call(req)
}))
}
}));
print_listening(args.address.as_str(), args.port, true);
server.await?;
} else {
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let server = hyper::Server::try_bind(&socket_addr)?.serve(make_service_fn(move |_| {
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let inner = inner.clone();
async move {
Ok::<_, Infallible>(service_fn(move |req| {
let inner = inner.clone();
inner.call(req)
}))
}
}));
print_listening(args.address.as_str(), args.port, false);
server.await?;
}
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Ok(())
}
struct InnerService {
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args: Arc<Args>,
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}
impl InnerService {
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pub fn new(args: Arc<Args>) -> Self {
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Self { args }
}
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pub async fn call(self: Arc<Self>, req: Request) -> Result<Response, hyper::Error> {
let method = req.method().clone();
let uri = req.uri().clone();
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let cors = self.args.cors;
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let timestamp = Local::now().format("%d/%b/%Y %H:%M:%S");
let mut res = match self.handle(req).await {
Ok(res) => {
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println!(r#"[{}] "{} {}" - {}"#, timestamp, method, uri, res.status());
res
}
Err(err) => {
let mut res = Response::default();
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let status = StatusCode::INTERNAL_SERVER_ERROR;
status!(res, status);
eprintln!(
r#"[{}] "{} {}" - {} {}"#,
timestamp, method, uri, status, err
);
res
}
};
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if cors {
add_cors(&mut res);
}
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Ok(res)
}
pub async fn handle(self: Arc<Self>, req: Request) -> BoxResult<Response> {
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let mut res = Response::default();
if !self.auth_guard(&req, &mut res) {
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return Ok(res);
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}
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let req_path = req.uri().path();
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let path = match self.extract_path(req_path) {
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Some(v) => v,
None => {
status!(res, StatusCode::FORBIDDEN);
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return Ok(res);
}
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};
let path = path.as_path();
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let query = req.uri().query().unwrap_or_default();
let meta = fs::metadata(path).await.ok();
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let is_miss = meta.is_none();
let is_dir = meta.map(|v| v.is_dir()).unwrap_or_default();
let is_file = !is_miss && !is_dir;
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let allow_upload = self.args.allow_upload;
let allow_delete = self.args.allow_delete;
let render_index = self.args.render_index;
let render_spa = self.args.render_spa;
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if !self.args.allow_symlink && !is_miss && !self.is_root_contained(path).await {
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status!(res, StatusCode::NOT_FOUND);
return Ok(res);
}
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match *req.method() {
Method::GET => {
let headers = req.headers();
if is_dir {
if render_index || render_spa {
self.handle_render_index(path, headers, &mut res).await?;
} else if query == "zip" {
self.handle_zip_dir(path, &mut res).await?;
} else if query.starts_with("q=") {
self.handle_query_dir(path, &query[3..], &mut res).await?;
} else {
self.handle_ls_dir(path, true, &mut res).await?;
}
} else if is_file {
self.handle_send_file(path, headers, &mut res).await?;
} else if render_spa {
self.handle_render_spa(path, headers, &mut res).await?;
} else if allow_upload && req_path.ends_with('/') {
self.handle_ls_dir(path, false, &mut res).await?;
} else {
status!(res, StatusCode::NOT_FOUND);
}
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}
Method::OPTIONS => {
status!(res, StatusCode::NO_CONTENT);
}
Method::PUT => {
if !allow_upload || (!allow_delete && is_file) {
status!(res, StatusCode::FORBIDDEN);
} else {
self.handle_upload(path, req, &mut res).await?;
}
}
Method::DELETE => {
if !allow_delete {
status!(res, StatusCode::FORBIDDEN);
} else if !is_miss {
self.handle_delete(path, is_dir).await?
} else {
status!(res, StatusCode::NOT_FOUND);
}
}
_ => {
status!(res, StatusCode::METHOD_NOT_ALLOWED);
}
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}
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Ok(res)
}
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async fn handle_upload(
&self,
path: &Path,
mut req: Request,
res: &mut Response,
) -> BoxResult<()> {
let ensure_parent = match path.parent() {
Some(parent) => match fs::metadata(parent).await {
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Ok(meta) => meta.is_dir(),
Err(_) => {
fs::create_dir_all(parent).await?;
true
}
},
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None => false,
};
if !ensure_parent {
status!(res, StatusCode::FORBIDDEN);
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return Ok(());
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}
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let mut file = fs::File::create(&path).await?;
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let body_with_io_error = req
.body_mut()
.map_err(|err| io::Error::new(io::ErrorKind::Other, err));
let body_reader = StreamReader::new(body_with_io_error);
futures::pin_mut!(body_reader);
io::copy(&mut body_reader, &mut file).await?;
let query = req.uri().query().unwrap_or_default();
if query == "unzip" {
if let Err(e) = self.unzip_file(path).await {
eprintln!("Failed to unzip {}, {}", path.display(), e);
status!(res, StatusCode::BAD_REQUEST);
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}
fs::remove_file(&path).await?;
}
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Ok(())
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}
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async fn handle_delete(&self, path: &Path, is_dir: bool) -> BoxResult<()> {
match is_dir {
true => fs::remove_dir_all(path).await?,
false => fs::remove_file(path).await?,
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}
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Ok(())
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}
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async fn handle_ls_dir(&self, path: &Path, exist: bool, res: &mut Response) -> BoxResult<()> {
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let mut paths: Vec<PathItem> = vec![];
if exist {
let mut rd = match fs::read_dir(path).await {
Ok(rd) => rd,
Err(_) => {
status!(res, StatusCode::FORBIDDEN);
return Ok(());
}
};
while let Some(entry) = rd.next_entry().await? {
let entry_path = entry.path();
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if let Ok(Some(item)) = self.to_pathitem(entry_path, path.to_path_buf()).await {
paths.push(item);
}
}
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}
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self.send_index(path, paths, res)
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}
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async fn handle_query_dir(
&self,
path: &Path,
query: &str,
res: &mut Response,
) -> BoxResult<()> {
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let mut paths: Vec<PathItem> = vec![];
let mut walkdir = WalkDir::new(path);
while let Some(entry) = walkdir.next().await {
if let Ok(entry) = entry {
if !entry
.file_name()
.to_string_lossy()
.to_lowercase()
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.contains(&query.to_lowercase())
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{
continue;
}
if fs::symlink_metadata(entry.path()).await.is_err() {
continue;
}
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if let Ok(Some(item)) = self.to_pathitem(entry.path(), path.to_path_buf()).await {
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paths.push(item);
}
}
}
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self.send_index(path, paths, res)
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}
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async fn handle_zip_dir(&self, path: &Path, res: &mut Response) -> BoxResult<()> {
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let (mut writer, reader) = tokio::io::duplex(BUF_SIZE);
let filename = path.file_name().unwrap().to_str().unwrap();
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let path = path.to_owned();
tokio::spawn(async move {
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if let Err(e) = zip_dir(&mut writer, &path).await {
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eprintln!("Failed to zip {}, {}", path.display(), e);
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}
});
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let stream = ReaderStream::new(reader);
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*res.body_mut() = Body::wrap_stream(stream);
res.headers_mut().insert(
CONTENT_DISPOSITION,
HeaderValue::from_str(&format!("attachment; filename=\"{}.zip\"", filename,)).unwrap(),
);
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Ok(())
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}
async fn handle_render_index(
&self,
path: &Path,
headers: &HeaderMap<HeaderValue>,
res: &mut Response,
) -> BoxResult<()> {
let path = path.join(INDEX_NAME);
if fs::metadata(&path)
.await
.ok()
.map(|v| v.is_file())
.unwrap_or_default()
{
self.handle_send_file(&path, headers, res).await?;
} else {
status!(res, StatusCode::NOT_FOUND);
}
Ok(())
}
async fn handle_render_spa(
&self,
path: &Path,
headers: &HeaderMap<HeaderValue>,
res: &mut Response,
) -> BoxResult<()> {
if path.extension().is_none() {
let path = self.args.path.join(INDEX_NAME);
self.handle_send_file(&path, headers, res).await?;
} else {
status!(res, StatusCode::NOT_FOUND);
}
Ok(())
}
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async fn handle_send_file(
&self,
path: &Path,
headers: &HeaderMap<HeaderValue>,
res: &mut Response,
) -> BoxResult<()> {
let (file, meta) = tokio::join!(fs::File::open(path), fs::metadata(path),);
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let (mut file, meta) = (file?, meta?);
let mut maybe_range = true;
if let Some((etag, last_modified)) = extract_cache_headers(&meta) {
let cached = {
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if let Some(if_none_match) = headers.typed_get::<IfNoneMatch>() {
!if_none_match.precondition_passes(&etag)
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} else if let Some(if_modified_since) = headers.typed_get::<IfModifiedSince>() {
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!if_modified_since.is_modified(last_modified.into())
} else {
false
}
};
res.headers_mut().typed_insert(last_modified);
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res.headers_mut().typed_insert(etag.clone());
if cached {
status!(res, StatusCode::NOT_MODIFIED);
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return Ok(());
}
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if headers.typed_get::<Range>().is_some() {
maybe_range = headers
.typed_get::<IfRange>()
.map(|if_range| !if_range.is_modified(Some(&etag), Some(&last_modified)))
// Always be fresh if there is no validators
.unwrap_or(true);
} else {
maybe_range = false;
}
}
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let file_range = if maybe_range {
if let Some(content_range) = headers
.typed_get::<Range>()
.and_then(|range| to_content_range(&range, meta.len()))
{
res.headers_mut().typed_insert(content_range.clone());
*res.status_mut() = StatusCode::PARTIAL_CONTENT;
content_range.bytes_range()
} else {
None
}
} else {
None
};
if let Some(mime) = mime_guess::from_path(&path).first() {
res.headers_mut().typed_insert(ContentType::from(mime));
}
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let body = if let Some((begin, end)) = file_range {
file.seek(io::SeekFrom::Start(begin)).await?;
let stream = FramedRead::new(file.take(end - begin + 1), BytesCodec::new());
Body::wrap_stream(stream)
} else {
let stream = FramedRead::new(file, BytesCodec::new());
Body::wrap_stream(stream)
};
*res.body_mut() = body;
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res.headers_mut().typed_insert(AcceptRanges::bytes());
res.headers_mut()
.typed_insert(ContentLength(meta.len() as u64));
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Ok(())
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}
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fn send_index(
&self,
path: &Path,
mut paths: Vec<PathItem>,
res: &mut Response,
) -> BoxResult<()> {
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paths.sort_unstable();
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let rel_path = match self.args.path.parent() {
Some(p) => path.strip_prefix(p).unwrap(),
None => path,
};
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let data = IndexData {
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breadcrumb: normalize_path(rel_path),
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paths,
allow_upload: self.args.allow_upload,
allow_delete: self.args.allow_delete,
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};
let data = serde_json::to_string(&data).unwrap();
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let output = INDEX_HTML.replace(
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"__SLOT__",
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&format!(
r#"
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<title>Files in {}/ - Duf</title>
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<style>{}</style>
<script>var DATA = {}; {}</script>
"#,
rel_path.display(),
INDEX_CSS,
data,
INDEX_JS
),
);
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*res.body_mut() = output.into();
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Ok(())
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}
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fn auth_guard(&self, req: &Request, res: &mut Response) -> bool {
let pass = {
match &self.args.auth {
None => true,
Some(auth) => match req.headers().get(AUTHORIZATION) {
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Some(value) => match value.to_str().ok().map(|v| {
let mut it = v.split(' ');
(it.next(), it.next())
}) {
Some((Some("Basic"), Some(tail))) => base64::decode(tail)
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.ok()
.and_then(|v| String::from_utf8(v).ok())
.map(|v| v.as_str() == auth)
.unwrap_or_default(),
_ => false,
},
None => self.args.no_auth_access && req.method() == Method::GET,
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},
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}
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};
if !pass {
status!(res, StatusCode::UNAUTHORIZED);
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res.headers_mut()
.insert(WWW_AUTHENTICATE, HeaderValue::from_static("Basic"));
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}
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pass
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}
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async fn is_root_contained(&self, path: &Path) -> bool {
fs::canonicalize(path)
.await
.ok()
.map(|v| v.starts_with(&self.args.path))
.unwrap_or_default()
}
async fn unzip_file(&self, path: &Path) -> BoxResult<()> {
let root = path.parent().unwrap();
let mut zip = ZipFileReader::new(File::open(&path).await?).await?;
for i in 0..zip.entries().len() {
let entry = &zip.entries()[i];
let entry_name = entry.name();
let entry_path = root.join(entry_name);
if entry_name.ends_with('/') {
fs::create_dir_all(entry_path).await?;
} else {
if !self.args.allow_delete && fs::metadata(&entry_path).await.is_ok() {
continue;
}
if let Some(parent) = entry_path.parent() {
if fs::symlink_metadata(parent).await.is_err() {
fs::create_dir_all(&parent).await?;
}
}
let mut outfile = fs::File::create(&entry_path).await?;
let mut reader = zip.entry_reader(i).await?;
io::copy(&mut reader, &mut outfile).await?;
}
}
Ok(())
}
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fn extract_path(&self, path: &str) -> Option<PathBuf> {
let decoded_path = percent_decode(path[1..].as_bytes()).decode_utf8().ok()?;
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let slashes_switched = if cfg!(windows) {
decoded_path.replace('/', "\\")
} else {
decoded_path.into_owned()
};
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let stripped_path = match self.strip_path_prefix(&slashes_switched) {
Some(path) => path,
None => return None,
};
Some(self.args.path.join(&stripped_path))
}
fn strip_path_prefix<'a, P: AsRef<Path>>(&self, path: &'a P) -> Option<&'a Path> {
let path = path.as_ref();
match self.args.path_prefix.as_deref() {
Some(prefix) => {
let prefix = prefix.trim_start_matches('/');
path.strip_prefix(prefix).ok()
}
None => Some(path),
}
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}
async fn to_pathitem<P: AsRef<Path>>(
&self,
path: P,
base_path: P,
) -> BoxResult<Option<PathItem>> {
let path = path.as_ref();
let rel_path = path.strip_prefix(base_path).unwrap();
let (meta, meta2) = tokio::join!(fs::metadata(&path), fs::symlink_metadata(&path));
let (meta, meta2) = (meta?, meta2?);
let is_symlink = meta2.is_symlink();
if !self.args.allow_symlink && is_symlink && !self.is_root_contained(path).await {
return Ok(None);
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}
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let is_dir = meta.is_dir();
let path_type = match (is_symlink, is_dir) {
(true, true) => PathType::SymlinkDir,
(false, true) => PathType::Dir,
(true, false) => PathType::SymlinkFile,
(false, false) => PathType::File,
};
let mtime = to_timestamp(&meta.modified()?);
let size = match path_type {
PathType::Dir | PathType::SymlinkDir => None,
PathType::File | PathType::SymlinkFile => Some(meta.len()),
};
let name = normalize_path(rel_path);
Ok(Some(PathItem {
path_type,
name,
mtime,
size,
}))
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}
}
#[derive(Debug, Serialize, Eq, PartialEq, Ord, PartialOrd)]
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struct IndexData {
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breadcrumb: String,
paths: Vec<PathItem>,
allow_upload: bool,
allow_delete: bool,
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}
#[derive(Debug, Serialize, Eq, PartialEq, Ord, PartialOrd)]
struct PathItem {
path_type: PathType,
name: String,
mtime: u64,
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size: Option<u64>,
}
#[derive(Debug, Serialize, Eq, PartialEq, Ord, PartialOrd)]
enum PathType {
Dir,
SymlinkDir,
File,
SymlinkFile,
}
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fn to_timestamp(time: &SystemTime) -> u64 {
time.duration_since(SystemTime::UNIX_EPOCH)
.unwrap()
.as_millis() as u64
}
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fn normalize_path<P: AsRef<Path>>(path: P) -> String {
let path = path.as_ref().to_str().unwrap_or_default();
if cfg!(windows) {
path.replace('\\', "/")
} else {
path.to_string()
}
}
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fn add_cors(res: &mut Response) {
res.headers_mut()
.typed_insert(AccessControlAllowOrigin::ANY);
res.headers_mut().typed_insert(
vec![RANGE, CONTENT_TYPE, ACCEPT, ORIGIN, WWW_AUTHENTICATE]
.into_iter()
.collect::<AccessControlAllowHeaders>(),
);
}
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async fn zip_dir<W: AsyncWrite + Unpin>(writer: &mut W, dir: &Path) -> BoxResult<()> {
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let mut writer = ZipFileWriter::new(writer);
let mut walkdir = WalkDir::new(dir);
while let Some(entry) = walkdir.next().await {
if let Ok(entry) = entry {
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let entry_path = entry.path();
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let meta = match fs::symlink_metadata(entry.path()).await {
Ok(meta) => meta,
Err(_) => continue,
};
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if !meta.is_file() {
continue;
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}
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let filename = match entry_path.strip_prefix(dir).ok().and_then(|v| v.to_str()) {
Some(v) => v,
None => continue,
};
let entry_options = EntryOptions::new(filename.to_owned(), Compression::Deflate);
let mut file = File::open(&entry_path).await?;
let mut file_writer = writer.write_entry_stream(entry_options).await?;
io::copy(&mut file, &mut file_writer).await?;
file_writer.close().await?;
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}
}
writer.close().await?;
Ok(())
}
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fn extract_cache_headers(meta: &Metadata) -> Option<(ETag, LastModified)> {
let mtime = meta.modified().ok()?;
let timestamp = to_timestamp(&mtime);
let size = meta.len();
let etag = format!(r#""{}-{}""#, timestamp, size)
.parse::<ETag>()
.unwrap();
let last_modified = LastModified::from(mtime);
Some((etag, last_modified))
}
fn to_content_range(range: &Range, complete_length: u64) -> Option<ContentRange> {
use core::ops::Bound::{Included, Unbounded};
let mut iter = range.iter();
let bounds = iter.next();
if iter.next().is_some() {
// Found multiple byte-range-spec. Drop.
return None;
}
bounds.and_then(|b| match b {
(Included(start), Included(end)) if start <= end && start < complete_length => {
ContentRange::bytes(
start..=end.min(complete_length.saturating_sub(1)),
complete_length,
)
.ok()
}
(Included(start), Unbounded) if start < complete_length => {
ContentRange::bytes(start.., complete_length).ok()
}
(Unbounded, Included(end)) if end > 0 => {
ContentRange::bytes(complete_length.saturating_sub(end).., complete_length).ok()
}
_ => None,
})
}
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fn print_listening(address: &str, port: u16, tls: bool) {
let addrs = retrive_listening_addrs(address);
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let protocol = if tls { "https" } else { "http" };
if addrs.len() == 1 {
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eprintln!("Listening on {}://{}:{}", protocol, addrs[0], port);
} else {
eprintln!("Listening on:");
for addr in addrs {
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eprintln!(" {}://{}:{}", protocol, addr, port);
}
eprintln!();
}
}
fn retrive_listening_addrs(address: &str) -> Vec<String> {
if address == "0.0.0.0" {
if let Ok(interfaces) = get_if_addrs() {
let mut ifaces: Vec<IpAddr> = interfaces
.into_iter()
.map(|v| v.ip())
.filter(|v| v.is_ipv4())
.collect();
ifaces.sort();
return ifaces.into_iter().map(|v| v.to_string()).collect();
}
}
vec![address.to_owned()]
}