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implement downloads, lots of misc tweaks/fixes

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xenofem 2022-04-27 20:15:51 -04:00
parent 18caa2baf1
commit 2ec295e606
7 changed files with 354 additions and 854 deletions
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67
Cargo.lock generated
View file

@ -597,65 +597,12 @@ dependencies = [
"percent-encoding",
]
[[package]]
name = "futures"
version = "0.3.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f73fe65f54d1e12b726f517d3e2135ca3125a437b6d998caf1962961f7172d9e"
dependencies = [
"futures-channel",
"futures-core",
"futures-executor",
"futures-io",
"futures-sink",
"futures-task",
"futures-util",
]
[[package]]
name = "futures-channel"
version = "0.3.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c3083ce4b914124575708913bca19bfe887522d6e2e6d0952943f5eac4a74010"
dependencies = [
"futures-core",
"futures-sink",
]
[[package]]
name = "futures-core"
version = "0.3.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0c09fd04b7e4073ac7156a9539b57a484a8ea920f79c7c675d05d289ab6110d3"
[[package]]
name = "futures-executor"
version = "0.3.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9420b90cfa29e327d0429f19be13e7ddb68fa1cccb09d65e5706b8c7a749b8a6"
dependencies = [
"futures-core",
"futures-task",
"futures-util",
]
[[package]]
name = "futures-io"
version = "0.3.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fc4045962a5a5e935ee2fdedaa4e08284547402885ab326734432bed5d12966b"
[[package]]
name = "futures-macro"
version = "0.3.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "33c1e13800337f4d4d7a316bf45a567dbcb6ffe087f16424852d97e97a91f512"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "futures-sink"
version = "0.3.21"
@ -674,16 +621,10 @@ version = "0.3.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d8b7abd5d659d9b90c8cba917f6ec750a74e2dc23902ef9cd4cc8c8b22e6036a"
dependencies = [
"futures-channel",
"futures-core",
"futures-io",
"futures-macro",
"futures-sink",
"futures-task",
"memchr",
"pin-project-lite",
"pin-utils",
"slab",
]
[[package]]
@ -1036,9 +977,9 @@ checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
[[package]]
name = "pin-project-lite"
version = "0.2.8"
version = "0.2.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e280fbe77cc62c91527259e9442153f4688736748d24660126286329742b4c6c"
checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
[[package]]
name = "pin-utils"
@ -1441,8 +1382,10 @@ dependencies = [
"bytes",
"crc32fast",
"env_logger",
"futures",
"futures-core",
"log",
"mime",
"pin-project-lite",
"rand",
"sanitise-file-name",
"serde",

4
Cargo.toml
View file

@ -16,8 +16,10 @@ actix-web-actors = "4.1.0"
bytes = "1.1.0"
crc32fast = "1.3.2"
env_logger = "0.9"
futures = "0.3"
futures-core = "0.3"
log = "0.4"
mime = "0.3.16"
pin-project-lite = "0.2.9"
rand = "0.8.5"
sanitise-file-name = "1.0.0"
serde = { version = "1.0", features = ["derive"] }

755
src/download.rs
View file

@ -1,496 +1,63 @@
use std::{
fs::Metadata,
io,
path::{Path, PathBuf},
time::{SystemTime, UNIX_EPOCH},
};
use std::{fs::File, os::unix::fs::MetadataExt, time::SystemTime};
use actix_web::{
body::{self, BoxBody, SizedStream},
dev::{
self, AppService, HttpServiceFactory, ResourceDef, Service, ServiceFactory,
ServiceRequest, ServiceResponse,
},
http::{
header::{
self, Charset, ContentDisposition, ContentEncoding, DispositionParam,
DispositionType, ExtendedValue, HeaderValue,
self, ContentDisposition, DispositionParam,
DispositionType, HeaderValue, HttpDate, EntityTag, IfUnmodifiedSince, IfMatch, IfNoneMatch, IfModifiedSince,
},
StatusCode,
},
Error, HttpMessage, HttpRequest, HttpResponse, Responder,
HttpMessage, HttpRequest, HttpResponse, Responder,
};
use bitflags::bitflags;
use derive_more::{Deref, DerefMut};
use futures_core::future::LocalBoxFuture;
use mime::Mime;
use mime_guess::from_path;
use crate::{encoding::equiv_utf8_text, range::HttpRange};
use actix_files::HttpRange;
bitflags! {
pub(crate) struct Flags: u8 {
const ETAG = 0b0000_0001;
const LAST_MD = 0b0000_0010;
const CONTENT_DISPOSITION = 0b0000_0100;
const PREFER_UTF8 = 0b0000_1000;
}
use crate::DownloadableFile;
// This is copied substantially from actix-files, with some tweaks
pub(crate) struct DownloadingFile {
pub(crate) file: File,
pub(crate) info: DownloadableFile,
}
impl Default for Flags {
fn default() -> Self {
Flags::from_bits_truncate(0b0000_1111)
}
}
/// A file with an associated name.
///
/// `NamedFile` can be registered as services:
/// ```
/// use actix_web::App;
/// use actix_files::NamedFile;
///
/// # async fn run() -> Result<(), Box<dyn std::error::Error>> {
/// let file = NamedFile::open_async("./static/index.html").await?;
/// let app = App::new().service(file);
/// # Ok(())
/// # }
/// ```
///
/// They can also be returned from handlers:
/// ```
/// use actix_web::{Responder, get};
/// use actix_files::NamedFile;
///
/// #[get("/")]
/// async fn index() -> impl Responder {
/// NamedFile::open_async("./static/index.html").await
/// }
/// ```
#[derive(Debug, Deref, DerefMut)]
pub struct NamedFile {
#[deref]
#[deref_mut]
file: File,
path: PathBuf,
modified: Option<SystemTime>,
pub(crate) md: Metadata,
pub(crate) flags: Flags,
pub(crate) status_code: StatusCode,
pub(crate) content_type: Mime,
pub(crate) content_disposition: ContentDisposition,
pub(crate) encoding: Option<ContentEncoding>,
}
pub(crate) use std::fs::File;
use super::chunked;
impl NamedFile {
/// Creates an instance from a previously opened file.
///
/// The given `path` need not exist and is only used to determine the `ContentType` and
/// `ContentDisposition` headers.
///
/// # Examples
/// ```ignore
/// use std::{
/// io::{self, Write as _},
/// env,
/// fs::File
/// };
/// use actix_files::NamedFile;
///
/// let mut file = File::create("foo.txt")?;
/// file.write_all(b"Hello, world!")?;
/// let named_file = NamedFile::from_file(file, "bar.txt")?;
/// # std::fs::remove_file("foo.txt");
/// Ok(())
/// ```
pub fn from_file<P: AsRef<Path>>(file: File, path: P) -> io::Result<NamedFile> {
let path = path.as_ref().to_path_buf();
// Get the name of the file and use it to construct default Content-Type
// and Content-Disposition values
let (content_type, content_disposition) = {
let filename = match path.file_name() {
Some(name) => name.to_string_lossy(),
None => {
return Err(io::Error::new(
io::ErrorKind::InvalidInput,
"Provided path has no filename",
));
}
};
let ct = from_path(&path).first_or_octet_stream();
let disposition = match ct.type_() {
mime::IMAGE | mime::TEXT | mime::AUDIO | mime::VIDEO => DispositionType::Inline,
mime::APPLICATION => match ct.subtype() {
mime::JAVASCRIPT | mime::JSON => DispositionType::Inline,
name if name == "wasm" => DispositionType::Inline,
_ => DispositionType::Attachment,
},
_ => DispositionType::Attachment,
};
let mut parameters =
vec![DispositionParam::Filename(String::from(filename.as_ref()))];
if !filename.is_ascii() {
parameters.push(DispositionParam::FilenameExt(ExtendedValue {
charset: Charset::Ext(String::from("UTF-8")),
language_tag: None,
value: filename.into_owned().into_bytes(),
}))
}
let cd = ContentDisposition {
disposition,
parameters,
};
(ct, cd)
};
let md = {
{
file.metadata()?
}
};
let modified = md.modified().ok();
let encoding = None;
Ok(NamedFile {
path,
file,
content_type,
content_disposition,
md,
modified,
encoding,
status_code: StatusCode::OK,
flags: Flags::default(),
})
}
/// Attempts to open a file in read-only mode.
///
/// # Examples
/// ```
/// use actix_files::NamedFile;
/// let file = NamedFile::open("foo.txt");
/// ```
pub fn open<P: AsRef<Path>>(path: P) -> io::Result<NamedFile> {
let file = File::open(&path)?;
Self::from_file(file, path)
}
/// Attempts to open a file asynchronously in read-only mode.
///
/// When the `experimental-io-uring` crate feature is enabled, this will be async. Otherwise, it
/// will behave just like `open`.
///
/// # Examples
/// ```
/// use actix_files::NamedFile;
/// # async fn open() {
/// let file = NamedFile::open_async("foo.txt").await.unwrap();
/// # }
/// ```
pub async fn open_async<P: AsRef<Path>>(path: P) -> io::Result<NamedFile> {
let file = {
{
File::open(&path)?
}
};
Self::from_file(file, path)
}
/// Returns reference to the underlying file object.
#[inline]
pub fn file(&self) -> &File {
&self.file
}
/// Returns the filesystem path to this file.
///
/// # Examples
/// ```
/// # use std::io;
/// use actix_files::NamedFile;
///
/// # async fn path() -> io::Result<()> {
/// let file = NamedFile::open_async("test.txt").await?;
/// assert_eq!(file.path().as_os_str(), "foo.txt");
/// # Ok(())
/// # }
/// ```
#[inline]
pub fn path(&self) -> &Path {
self.path.as_path()
}
/// Returns the time the file was last modified.
///
/// Returns `None` only on unsupported platforms; see [`std::fs::Metadata::modified()`].
/// Therefore, it is usually safe to unwrap this.
#[inline]
pub fn modified(&self) -> Option<SystemTime> {
self.modified
}
/// Returns the filesystem metadata associated with this file.
#[inline]
pub fn metadata(&self) -> &Metadata {
&self.md
}
/// Returns the `Content-Type` header that will be used when serving this file.
#[inline]
pub fn content_type(&self) -> &Mime {
&self.content_type
}
/// Returns the `Content-Disposition` that will be used when serving this file.
#[inline]
pub fn content_disposition(&self) -> &ContentDisposition {
&self.content_disposition
}
/// Returns the `Content-Encoding` that will be used when serving this file.
///
/// A return value of `None` indicates that the content is not already using a compressed
/// representation and may be subject to compression downstream.
#[inline]
pub fn content_encoding(&self) -> Option<ContentEncoding> {
self.encoding
}
/// Set response status code.
#[deprecated(since = "0.7.0", note = "Prefer `Responder::customize()`.")]
pub fn set_status_code(mut self, status: StatusCode) -> Self {
self.status_code = status;
self
}
/// Sets the `Content-Type` header that will be used when serving this file. By default the
/// `Content-Type` is inferred from the filename extension.
#[inline]
pub fn set_content_type(mut self, mime_type: Mime) -> Self {
self.content_type = mime_type;
self
}
/// Set the Content-Disposition for serving this file. This allows changing the
/// `inline/attachment` disposition as well as the filename sent to the peer.
///
/// By default the disposition is `inline` for `text/*`, `image/*`, `video/*` and
/// `application/{javascript, json, wasm}` mime types, and `attachment` otherwise, and the
/// filename is taken from the path provided in the `open` method after converting it to UTF-8
/// (using `to_string_lossy`).
#[inline]
pub fn set_content_disposition(mut self, cd: ContentDisposition) -> Self {
self.content_disposition = cd;
self.flags.insert(Flags::CONTENT_DISPOSITION);
self
}
/// Disables `Content-Disposition` header.
///
/// By default, the `Content-Disposition` header is sent.
#[inline]
pub fn disable_content_disposition(mut self) -> Self {
self.flags.remove(Flags::CONTENT_DISPOSITION);
self
}
/// Sets content encoding for this file.
///
/// This prevents the `Compress` middleware from modifying the file contents and signals to
/// browsers/clients how to decode it. For example, if serving a compressed HTML file (e.g.,
/// `index.html.gz`) then use `.set_content_encoding(ContentEncoding::Gzip)`.
#[inline]
pub fn set_content_encoding(mut self, enc: ContentEncoding) -> Self {
self.encoding = Some(enc);
self
}
/// Specifies whether to return `ETag` header in response.
///
/// Default is true.
#[inline]
pub fn use_etag(mut self, value: bool) -> Self {
self.flags.set(Flags::ETAG, value);
self
}
/// Specifies whether to return `Last-Modified` header in response.
///
/// Default is true.
#[inline]
pub fn use_last_modified(mut self, value: bool) -> Self {
self.flags.set(Flags::LAST_MD, value);
self
}
/// Specifies whether text responses should signal a UTF-8 encoding.
///
/// Default is false (but will default to true in a future version).
#[inline]
pub fn prefer_utf8(mut self, value: bool) -> Self {
self.flags.set(Flags::PREFER_UTF8, value);
self
}
/// Creates an `ETag` in a format is similar to Apache's.
pub(crate) fn etag(&self) -> Option<header::EntityTag> {
self.modified.as_ref().map(|mtime| {
let ino = {
#[cfg(unix)]
{
#[cfg(unix)]
use std::os::unix::fs::MetadataExt as _;
self.md.ino()
}
#[cfg(not(unix))]
{
0
}
};
let dur = mtime
.duration_since(UNIX_EPOCH)
.expect("modification time must be after epoch");
header::EntityTag::new_strong(format!(
"{:x}:{:x}:{:x}:{:x}",
ino,
self.md.len(),
dur.as_secs(),
dur.subsec_nanos()
))
})
}
pub(crate) fn last_modified(&self) -> Option<header::HttpDate> {
self.modified.map(|mtime| mtime.into())
impl DownloadingFile {
fn etag(&self) -> EntityTag {
let ino = self.file.metadata().map(|md| md.ino()).unwrap_or_default();
EntityTag::new_strong(format!(
"{:x}:{:x}:{:x}:{:x}",
ino,
self.info.size,
self.info.modtime.unix_timestamp() as u64,
self.info.modtime.nanosecond(),
))
}
/// Creates an `HttpResponse` with file as a streaming body.
pub fn into_response(self, req: &HttpRequest) -> HttpResponse<BoxBody> {
if self.status_code != StatusCode::OK {
let mut res = HttpResponse::build(self.status_code);
let etag = self.etag();
let last_modified = HttpDate::from(SystemTime::from(self.info.modtime));
let ct = if self.flags.contains(Flags::PREFER_UTF8) {
equiv_utf8_text(self.content_type.clone())
} else {
self.content_type
};
let precondition_failed = precondition_failed(req, &etag, &last_modified);
let not_modified = not_modified(req, &etag, &last_modified);
res.insert_header((header::CONTENT_TYPE, ct.to_string()));
let mut res = HttpResponse::build(StatusCode::OK);
if self.flags.contains(Flags::CONTENT_DISPOSITION) {
res.insert_header((
header::CONTENT_DISPOSITION,
self.content_disposition.to_string(),
));
res.insert_header((header::CONTENT_TYPE, mime::APPLICATION_OCTET_STREAM));
res.insert_header((
header::CONTENT_DISPOSITION,
ContentDisposition {
disposition: DispositionType::Attachment,
parameters: vec![DispositionParam::Filename(self.info.name)],
}
if let Some(current_encoding) = self.encoding {
res.insert_header((header::CONTENT_ENCODING, current_encoding.as_str()));
}
let reader = chunked::new_chunked_read(self.md.len(), 0, self.file);
return res.streaming(reader);
}
let etag = if self.flags.contains(Flags::ETAG) {
self.etag()
} else {
None
};
let last_modified = if self.flags.contains(Flags::LAST_MD) {
self.last_modified()
} else {
None
};
// check preconditions
let precondition_failed = if !any_match(etag.as_ref(), req) {
true
} else if let (Some(ref m), Some(header::IfUnmodifiedSince(ref since))) =
(last_modified, req.get_header())
{
let t1: SystemTime = (*m).into();
let t2: SystemTime = (*since).into();
match (t1.duration_since(UNIX_EPOCH), t2.duration_since(UNIX_EPOCH)) {
(Ok(t1), Ok(t2)) => t1.as_secs() > t2.as_secs(),
_ => false,
}
} else {
false
};
// check last modified
let not_modified = if !none_match(etag.as_ref(), req) {
true
} else if req.headers().contains_key(header::IF_NONE_MATCH) {
false
} else if let (Some(ref m), Some(header::IfModifiedSince(ref since))) =
(last_modified, req.get_header())
{
let t1: SystemTime = (*m).into();
let t2: SystemTime = (*since).into();
match (t1.duration_since(UNIX_EPOCH), t2.duration_since(UNIX_EPOCH)) {
(Ok(t1), Ok(t2)) => t1.as_secs() <= t2.as_secs(),
_ => false,
}
} else {
false
};
let mut res = HttpResponse::build(self.status_code);
let ct = if self.flags.contains(Flags::PREFER_UTF8) {
equiv_utf8_text(self.content_type.clone())
} else {
self.content_type
};
res.insert_header((header::CONTENT_TYPE, ct.to_string()));
if self.flags.contains(Flags::CONTENT_DISPOSITION) {
res.insert_header((
header::CONTENT_DISPOSITION,
self.content_disposition.to_string(),
));
}
if let Some(current_encoding) = self.encoding {
res.insert_header((header::CONTENT_ENCODING, current_encoding.as_str()));
}
if let Some(lm) = last_modified {
res.insert_header((header::LAST_MODIFIED, lm.to_string()));
}
if let Some(etag) = etag {
res.insert_header((header::ETAG, etag.to_string()));
}
));
res.insert_header((header::LAST_MODIFIED, last_modified));
res.insert_header((header::ETAG, etag));
res.insert_header((header::ACCEPT_RANGES, "bytes"));
let mut length = self.md.len();
let mut length = self.info.size;
let mut offset = 0;
// check for range header
@ -508,7 +75,7 @@ impl NamedFile {
res.insert_header((
header::CONTENT_RANGE,
format!("bytes {}-{}/{}", offset, offset + length - 1, self.md.len()),
format!("bytes {}-{}/{}", offset, offset + length - 1, self.info.size),
));
} else {
res.insert_header((header::CONTENT_RANGE, format!("bytes */{}", length)));
@ -528,9 +95,9 @@ impl NamedFile {
.map_into_boxed_body();
}
let reader = chunked::new_chunked_read(length, offset, self.file);
let reader = crate::file::new_live_reader(length, offset, self.file, self.info.uploader);
if offset != 0 || length != self.md.len() {
if offset != 0 || length != self.info.size {
res.status(StatusCode::PARTIAL_CONTENT);
}
@ -538,232 +105,40 @@ impl NamedFile {
}
}
/// Returns true if `req` has no `If-Match` header or one which matches `etag`.
fn any_match(etag: Option<&header::EntityTag>, req: &HttpRequest) -> bool {
match req.get_header::<header::IfMatch>() {
None | Some(header::IfMatch::Any) => true,
Some(header::IfMatch::Items(ref items)) => {
if let Some(some_etag) = etag {
for item in items {
if item.strong_eq(some_etag) {
return true;
}
}
}
false
fn precondition_failed(req: &HttpRequest, etag: &EntityTag, last_modified: &HttpDate) -> bool {
if let Some(IfMatch::Items(ref items)) = req.get_header() {
if !items.iter().any(|item| item.strong_eq(etag)) {
return true;
}
}
}
/// Returns true if `req` doesn't have an `If-None-Match` header matching `req`.
fn none_match(etag: Option<&header::EntityTag>, req: &HttpRequest) -> bool {
match req.get_header::<header::IfNoneMatch>() {
Some(header::IfNoneMatch::Any) => false,
Some(header::IfNoneMatch::Items(ref items)) => {
if let Some(some_etag) = etag {
for item in items {
if item.weak_eq(some_etag) {
return false;
}
}
}
true
if let Some(IfUnmodifiedSince(ref since)) = req.get_header() {
if last_modified > since {
return true;
}
None => true,
}
false
}
impl Responder for NamedFile {
fn not_modified(req: &HttpRequest, etag: &EntityTag, last_modified: &HttpDate) -> bool {
match req.get_header::<IfNoneMatch>() {
Some(IfNoneMatch::Any) => { return true; }
Some(IfNoneMatch::Items(ref items)) => {
return items.iter().any(|item| item.weak_eq(etag));
}
None => (),
}
if let Some(IfModifiedSince(ref since)) = req.get_header() {
if last_modified < since {
return true;
}
}
false
}
impl Responder for DownloadingFile {
type Body = BoxBody;
fn respond_to(self, req: &HttpRequest) -> HttpResponse<Self::Body> {
self.into_response(req)
}
}
impl ServiceFactory<ServiceRequest> for NamedFile {
type Response = ServiceResponse;
type Error = Error;
type Config = ();
type Service = NamedFileService;
type InitError = ();
type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
fn new_service(&self, _: ()) -> Self::Future {
let service = NamedFileService {
path: self.path.clone(),
};
Box::pin(async move { Ok(service) })
}
}
#[doc(hidden)]
#[derive(Debug)]
pub struct NamedFileService {
path: PathBuf,
}
impl Service<ServiceRequest> for NamedFileService {
type Response = ServiceResponse;
type Error = Error;
type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
dev::always_ready!();
fn call(&self, req: ServiceRequest) -> Self::Future {
let (req, _) = req.into_parts();
let path = self.path.clone();
Box::pin(async move {
let file = NamedFile::open_async(path).await?;
let res = file.into_response(&req);
Ok(ServiceResponse::new(req, res))
})
}
}
impl HttpServiceFactory for NamedFile {
fn register(self, config: &mut AppService) {
config.register_service(
ResourceDef::root_prefix(self.path.to_string_lossy().as_ref()),
None,
self,
None,
)
}
}
use std::{
cmp, fmt,
future::Future,
io,
pin::Pin,
task::{Context, Poll},
};
use actix_web::{error::Error, web::Bytes};
use futures_core::{ready, Stream};
use pin_project_lite::pin_project;
use super::named::File;
pin_project! {
/// Adapter to read a `std::file::File` in chunks.
#[doc(hidden)]
pub struct ChunkedReadFile<F, Fut> {
size: u64,
offset: u64,
#[pin]
state: ChunkedReadFileState<Fut>,
counter: u64,
callback: F,
}
}
pin_project! {
#[project = ChunkedReadFileStateProj]
#[project_replace = ChunkedReadFileStateProjReplace]
enum ChunkedReadFileState<Fut> {
File { file: Option<File>, },
Future { #[pin] fut: Fut },
}
}
impl<F, Fut> fmt::Debug for ChunkedReadFile<F, Fut> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("ChunkedReadFile")
}
}
pub(crate) fn new_chunked_read(
size: u64,
offset: u64,
file: File,
) -> impl Stream<Item = Result<Bytes, Error>> {
ChunkedReadFile {
size,
offset,
state: ChunkedReadFileState::File { file: Some(file) },
counter: 0,
callback: chunked_read_file_callback,
}
}
async fn chunked_read_file_callback(
mut file: File,
offset: u64,
max_bytes: usize,
) -> Result<(File, Bytes), Error> {
use io::{Read as _, Seek as _};
let res = actix_web::web::block(move || {
let mut buf = Vec::with_capacity(max_bytes);
file.seek(io::SeekFrom::Start(offset))?;
let n_bytes = file.by_ref().take(max_bytes as u64).read_to_end(&mut buf)?;
if n_bytes == 0 {
Err(io::Error::from(io::ErrorKind::UnexpectedEof))
} else {
Ok((file, Bytes::from(buf)))
}
})
.await??;
Ok(res)
}
impl<F, Fut> Stream for ChunkedReadFile<F, Fut>
where
F: Fn(File, u64, usize) -> Fut,
Fut: Future<Output = Result<(File, Bytes), Error>>,
{
type Item = Result<Bytes, Error>;
fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
let mut this = self.as_mut().project();
match this.state.as_mut().project() {
ChunkedReadFileStateProj::File { file } => {
let size = *this.size;
let offset = *this.offset;
let counter = *this.counter;
if size == counter {
Poll::Ready(None)
} else {
let max_bytes = cmp::min(size.saturating_sub(counter), 65_536) as usize;
let file = file
.take()
.expect("ChunkedReadFile polled after completion");
let fut = (this.callback)(file, offset, max_bytes);
this.state
.project_replace(ChunkedReadFileState::Future { fut });
self.poll_next(cx)
}
}
ChunkedReadFileStateProj::Future { fut } => {
let (file, bytes) = ready!(fut.poll(cx))?;
this.state
.project_replace(ChunkedReadFileState::File { file: Some(file) });
*this.offset += bytes.len() as u64;
*this.counter += bytes.len() as u64;
Poll::Ready(Some(Ok(bytes)))
}
}
}
}

156
src/file.rs
View file

@ -1,4 +1,13 @@
use std::{fs::File, io::Write, path::PathBuf, task::Waker};
use std::{cmp, fs::File, future::Future, io::{self, Write}, path::PathBuf, pin::Pin, task::{Context, Poll, Waker}};
use actix::Addr;
use actix_web::error::{Error, ErrorInternalServerError};
use bytes::Bytes;
use futures_core::{ready, Stream};
use log::trace;
use pin_project_lite::pin_project;
use crate::upload::WakerMessage;
pub trait LiveWriter: Write {
fn add_waker(&mut self, waker: Waker);
@ -43,3 +52,148 @@ impl Write for LiveFileWriter {
self.file.flush()
}
}
// This implementation of a file responder is copied pretty directly
// from actix-files with some tweaks
pin_project! {
pub struct LiveFileReader<F, Fut> {
size: u64,
offset: u64,
#[pin]
state: LiveFileReaderState<Fut>,
counter: u64,
available_file_size: u64,
callback: F,
uploader: Option<Addr<crate::upload::Uploader>>,
}
}
pin_project! {
#[project = LiveFileReaderStateProj]
#[project_replace = LiveFileReaderStateProjReplace]
enum LiveFileReaderState<Fut> {
File { file: Option<File>, },
Future { #[pin] fut: Fut },
}
}
pub(crate) fn new_live_reader(
size: u64,
offset: u64,
file: File,
uploader: Option<Addr<crate::upload::Uploader>>,
) -> impl Stream<Item = Result<Bytes, Error>> {
LiveFileReader {
size,
offset,
state: LiveFileReaderState::File { file: Some(file) },
counter: 0,
available_file_size: 0,
callback: live_file_reader_callback,
uploader,
}
}
async fn live_file_reader_callback(
mut file: File,
offset: u64,
max_bytes: usize,
) -> Result<(File, Bytes), Error> {
use io::{Read as _, Seek as _};
let res = actix_web::web::block(move || {
trace!("reading up to {} bytes of file starting at {}", max_bytes, offset);
let mut buf = Vec::with_capacity(max_bytes);
file.seek(io::SeekFrom::Start(offset))?;
let n_bytes = std::io::Read::by_ref(&mut file).take(max_bytes as u64).read_to_end(&mut buf)?;
trace!("got {} bytes from file", n_bytes);
if n_bytes == 0 {
Err(io::Error::from(io::ErrorKind::UnexpectedEof))
} else {
Ok((file, Bytes::from(buf)))
}
})
.await??;
Ok(res)
}
impl<F, Fut> Stream for LiveFileReader<F, Fut>
where
F: Fn(File, u64, usize) -> Fut,
Fut: Future<Output = Result<(File, Bytes), Error>>,
{
type Item = Result<Bytes, Error>;
fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
let mut this = self.as_mut().project();
match this.state.as_mut().project() {
LiveFileReaderStateProj::File { file } => {
let size = *this.size;
let offset = *this.offset;
let counter = *this.counter;
if size == counter {
Poll::Ready(None)
} else {
let inner_file = file
.take()
.expect("LiveFileReader polled after completion");
if offset >= *this.available_file_size {
trace!("offset {} has reached available file size {}, updating metadata", offset, this.available_file_size);
// If we've hit the end of what was available
// last time we checked, check again
*this.available_file_size = match inner_file.metadata() {
Ok(md) => md.len(),
Err(e) => {
return Poll::Ready(Some(Err(e.into())));
}
};
trace!("new available file size: {}", this.available_file_size);
// If we're still at the end, wait for a wakeup from the uploader
if offset >= *this.available_file_size {
trace!("requesting wakeup from uploader");
file.get_or_insert(inner_file);
if let Some(addr) = this.uploader {
if let Ok(()) = addr.try_send(WakerMessage(cx.waker().clone())) {
return Poll::Pending;
} else {
return Poll::Ready(Some(Err(ErrorInternalServerError("Failed to contact file upload actor"))));
}
} else {
return Poll::Ready(Some(Err(ErrorInternalServerError("File upload was not completed"))));
}
}
}
let max_bytes = cmp::min(65_536, cmp::min(size.saturating_sub(counter), this.available_file_size.saturating_sub(offset))) as usize;
let fut = (this.callback)(inner_file, offset, max_bytes);
this.state
.project_replace(LiveFileReaderState::Future { fut });
self.poll_next(cx)
}
}
LiveFileReaderStateProj::Future { fut } => {
let (file, bytes) = ready!(fut.poll(cx))?;
this.state
.project_replace(LiveFileReaderState::File { file: Some(file) });
*this.offset += bytes.len() as u64;
*this.counter += bytes.len() as u64;
Poll::Ready(Some(Ok(bytes)))
}
}
}
}

38
src/main.rs
View file

@ -1,4 +1,4 @@
//mod download;
mod download;
mod file;
mod upload;
mod zip;
@ -6,27 +6,27 @@ mod zip;
use std::{
collections::HashMap,
path::PathBuf,
sync::{mpsc::Sender, RwLock},
task::Waker,
fs::File,
};
use actix::Addr;
use actix_web::{
get, middleware::Logger, web, App, HttpRequest, HttpResponse, HttpServer, Responder,
get, middleware::Logger, web, App, HttpRequest, HttpServer, Responder, HttpResponse,
};
use actix_web_actors::ws;
use time::OffsetDateTime;
use tokio::sync::RwLock;
const APP_NAME: &'static str = "transbeam";
pub struct UploadedFile {
name: String,
size: usize,
size: u64,
modtime: OffsetDateTime,
}
impl UploadedFile {
fn new(name: &str, size: usize, modtime: OffsetDateTime) -> Self {
fn new(name: &str, size: u64, modtime: OffsetDateTime) -> Self {
Self {
name: sanitise_file_name::sanitise(name),
size,
@ -35,9 +35,10 @@ impl UploadedFile {
}
}
#[derive(Clone)]
pub struct DownloadableFile {
name: String,
size: usize,
size: u64,
modtime: OffsetDateTime,
uploader: Option<Addr<upload::Uploader>>,
}
@ -48,8 +49,26 @@ fn storage_dir() -> PathBuf {
PathBuf::from(std::env::var("STORAGE_DIR").unwrap_or_else(|_| String::from("storage")))
}
#[get("/download/{file_code}")]
async fn handle_download(req: HttpRequest, path: web::Path<String>, data: AppData) -> actix_web::Result<HttpResponse> {
let file_code = path.into_inner();
if !file_code.as_bytes().iter().all(|c| c.is_ascii_alphanumeric()) {
return Ok(HttpResponse::NotFound().finish());
}
let data = data.read().await;
let info = data.get(&file_code);
if let Some(info) = info {
Ok(download::DownloadingFile {
file: File::open(storage_dir().join(file_code))?,
info: info.clone(),
}.into_response(&req))
} else {
Ok(HttpResponse::NotFound().finish())
}
}
#[get("/upload")]
async fn upload_socket(req: HttpRequest, stream: web::Payload, data: AppData) -> impl Responder {
async fn handle_upload(req: HttpRequest, stream: web::Payload, data: AppData) -> impl Responder {
ws::start(upload::Uploader::new(data), &req, stream)
}
@ -70,7 +89,8 @@ async fn main() -> std::io::Result<()> {
App::new()
.app_data(data.clone())
.wrap(Logger::default())
.service(upload_socket)
.service(handle_upload)
.service(handle_download)
.service(actix_files::Files::new("/", static_dir.clone()).index_file("index.html"))
})
.bind(("127.0.0.1", port))?

109
src/upload.rs
View file

@ -1,8 +1,9 @@
use std::{collections::HashSet, fmt::Display, io::Write, task::Waker};
use std::{collections::HashSet, io::Write, task::Waker};
use actix::{Actor, ActorContext, AsyncContext, StreamHandler, Message, Handler};
use actix_http::ws::{CloseReason, Item};
use actix_web_actors::ws::{self, CloseCode};
use bytes::Bytes;
use log::{debug, error, info, trace};
use rand::distributions::{Alphanumeric, DistString};
use serde::Deserialize;
@ -21,8 +22,6 @@ enum Error {
Storage(#[from] std::io::Error),
#[error("Time formatting error")]
TimeFormat(#[from] time::error::Format),
#[error("Lock on app state is poisoned")]
LockPoisoned,
#[error("Duplicate filename could not be deduplicated")]
DuplicateFilename,
#[error("This message type was not expected at this stage")]
@ -41,7 +40,6 @@ impl Error {
Self::Parse(_) => CloseCode::Invalid,
Self::Storage(_) => CloseCode::Error,
Self::TimeFormat(_) => CloseCode::Error,
Self::LockPoisoned => CloseCode::Error,
Self::DuplicateFilename => CloseCode::Policy,
Self::UnexpectedMessageType => CloseCode::Invalid,
Self::NoFiles => CloseCode::Policy,
@ -55,7 +53,7 @@ pub struct Uploader {
writer: Option<Box<dyn LiveWriter>>,
storage_filename: String,
app_data: super::AppData,
bytes_remaining: usize,
bytes_remaining: u64,
}
impl Uploader {
@ -87,7 +85,7 @@ impl Handler<WakerMessage> for Uploader {
#[derive(Debug, Deserialize)]
struct RawUploadedFile {
name: String,
size: usize,
size: u64,
modtime: i64,
}
@ -129,9 +127,13 @@ impl StreamHandler<Result<ws::Message, ws::ProtocolError>> for Uploader {
code: CloseCode::Normal,
description: None,
}));
if let Some(f) = self.app_data.write().unwrap().get_mut(&self.storage_filename) {
f.uploader.take();
}
let data = self.app_data.clone();
let filename = self.storage_filename.clone();
ctx.wait(actix::fut::wrap_future(async move {
if let Some(f) = data.write().await.get_mut(&filename) {
f.uploader.take();
}
}));
ctx.stop();
}
_ => (),
@ -181,61 +183,51 @@ impl Uploader {
let storage_path = super::storage_dir().join(storage_filename.clone());
info!("storing to: {:?}", storage_path);
let writer = super::file::LiveFileWriter::new(&storage_path)?;
if files.len() > 1 {
let addr = Some(ctx.address());
let (writer, downloadable_file): (Box<dyn LiveWriter>, _) = if files.len() > 1 {
info!("Wrapping in zipfile generator");
let now = OffsetDateTime::now_utc();
let writer = super::zip::ZipGenerator::new(files, Box::new(writer));
let size = writer.total_size();
self.writer = Some(Box::new(writer));
let zip_writer = super::zip::ZipGenerator::new(files, writer);
let size = zip_writer.total_size();
let download_filename =
super::APP_NAME.to_owned() + &now.format(FILENAME_DATE_FORMAT)? + ".zip";
let modtime = now;
self.app_data
.write()
.map_err(|_| Error::LockPoisoned)?
.insert(
storage_filename,
DownloadableFile {
name: download_filename,
size,
modtime,
uploader: Some(ctx.address()),
},
);
(Box::new(zip_writer), DownloadableFile {
name: download_filename,
size,
modtime: now,
uploader: addr,
})
} else {
self.writer = Some(Box::new(writer));
self.app_data
(Box::new(writer), DownloadableFile {
name: files[0].name.clone(),
size: files[0].size,
modtime: files[0].modtime,
uploader: addr,
})
};
self.writer = Some(writer);
let data = self.app_data.clone();
let storage_filename_copy = storage_filename.clone();
ctx.spawn(actix::fut::wrap_future(async move {
data
.write()
.map_err(|_| Error::LockPoisoned)?
.await
.insert(
storage_filename,
DownloadableFile {
name: files[0].name.clone(),
size: files[0].size,
modtime: files[0].modtime,
uploader: Some(ctx.address()),
},
storage_filename_copy,
downloadable_file,
);
}
}));
ctx.text(self.storage_filename.as_str());
}
ws::Message::Binary(data)
| ws::Message::Continuation(Item::FirstBinary(data))
| ws::Message::Continuation(Item::Continue(data))
| ws::Message::Continuation(Item::Last(data)) => {
if let Some(ref mut writer) = self.writer {
if data.len() > self.bytes_remaining {
return Err(Error::TooMuchData);
}
self.bytes_remaining -= data.len();
writer.write_all(&data)?;
ack(ctx);
if self.bytes_remaining == 0 {
return Ok(true);
}
} else {
return Err(Error::UnexpectedMessageType);
}
let result = self.handle_data(data)?;
ack(ctx);
return Ok(result);
}
ws::Message::Continuation(Item::FirstBinary(data))
| ws::Message::Continuation(Item::Continue(data)) => {
return self.handle_data(data);
}
ws::Message::Close(reason) => {
if self.bytes_remaining > 0 {
@ -255,4 +247,17 @@ impl Uploader {
}
Ok(false)
}
fn handle_data(&mut self, data: Bytes) -> Result<bool, Error> {
if let Some(ref mut writer) = self.writer {
if (data.len() as u64) > self.bytes_remaining {
return Err(Error::TooMuchData);
}
self.bytes_remaining -= data.len() as u64;
writer.write_all(&data)?;
Ok(self.bytes_remaining == 0)
} else {
Err(Error::UnexpectedMessageType)
}
}
}

79
src/zip.rs
View file

@ -8,30 +8,30 @@ use time::OffsetDateTime;
use crate::file::LiveWriter;
use crate::UploadedFile;
const SIGNATURE_SIZE: usize = 4;
const SHARED_FIELDS_SIZE: usize = 26;
const EXTRA_FIELD_SIZE: usize = 41;
const LOCAL_HEADER_SIZE_MINUS_FILENAME: usize =
const SIGNATURE_SIZE: u64 = 4;
const SHARED_FIELDS_SIZE: u64 = 26;
const EXTRA_FIELD_SIZE: u64 = 41;
const LOCAL_HEADER_SIZE_MINUS_FILENAME: u64 =
SIGNATURE_SIZE + SHARED_FIELDS_SIZE + EXTRA_FIELD_SIZE;
const DATA_DESCRIPTOR_SIZE: usize = 24;
const FILE_ENTRY_SIZE_MINUS_FILENAME_AND_FILE: usize =
const DATA_DESCRIPTOR_SIZE: u64 = 24;
const FILE_ENTRY_SIZE_MINUS_FILENAME_AND_FILE: u64 =
LOCAL_HEADER_SIZE_MINUS_FILENAME + DATA_DESCRIPTOR_SIZE;
const CENTRAL_DIRECTORY_HEADER_SIZE_MINUS_FILENAME: usize =
const CENTRAL_DIRECTORY_HEADER_SIZE_MINUS_FILENAME: u64 =
SIGNATURE_SIZE + 2 + SHARED_FIELDS_SIZE + 14 + EXTRA_FIELD_SIZE;
const EOCD64_RECORD_SIZE: usize = 56;
const EOCD64_LOCATOR_SIZE: usize = 20;
const EOCD_RECORD_SIZE: usize = 22;
const EOCD_TOTAL_SIZE: usize = EOCD64_RECORD_SIZE + EOCD64_LOCATOR_SIZE + EOCD_RECORD_SIZE;
const EOCD64_RECORD_SIZE: u64 = 56;
const EOCD64_LOCATOR_SIZE: u64 = 20;
const EOCD_RECORD_SIZE: u64 = 22;
const EOCD_TOTAL_SIZE: u64 = EOCD64_RECORD_SIZE + EOCD64_LOCATOR_SIZE + EOCD_RECORD_SIZE;
const EMPTY_STRING_CRC32: u32 = 0;
fn file_entry_size(file: &UploadedFile) -> usize {
FILE_ENTRY_SIZE_MINUS_FILENAME_AND_FILE + file.name.len() + file.size
fn file_entry_size(file: &UploadedFile) -> u64 {
FILE_ENTRY_SIZE_MINUS_FILENAME_AND_FILE + file.name.len() as u64 + file.size
}
fn file_entries_size(files: &[UploadedFile]) -> usize {
fn file_entries_size(files: &[UploadedFile]) -> u64 {
let mut total = 0;
for file in files.iter() {
total += file_entry_size(file)
@ -39,15 +39,15 @@ fn file_entries_size(files: &[UploadedFile]) -> usize {
total
}
fn central_directory_size(files: &[UploadedFile]) -> usize {
fn central_directory_size(files: &[UploadedFile]) -> u64 {
let mut total = 0;
for file in files.iter() {
total += CENTRAL_DIRECTORY_HEADER_SIZE_MINUS_FILENAME + file.name.len();
total += CENTRAL_DIRECTORY_HEADER_SIZE_MINUS_FILENAME + file.name.len() as u64;
}
total
}
fn zipfile_size(files: &[UploadedFile]) -> usize {
fn zipfile_size(files: &[UploadedFile]) -> u64 {
file_entries_size(files) + central_directory_size(files) + EOCD_TOTAL_SIZE
}
@ -102,7 +102,7 @@ impl UploadedFile {
fields
}
fn extra_field(&self, local_header_offset: usize) -> Vec<u8> {
fn extra_field(&self, local_header_offset: u64) -> Vec<u8> {
let mut field = vec![
0x01, 0x00, // Zip64 extended information
28, 0, // 28 bytes of data
@ -111,9 +111,9 @@ impl UploadedFile {
// header, we're supposed to leave these blank and point to
// the data descriptor, but I'm assuming it won't hurt to fill
// them in regardless
append_value(&mut field, self.size as u64, 8);
append_value(&mut field, self.size as u64, 8);
append_value(&mut field, local_header_offset as u64, 8);
append_value(&mut field, self.size, 8);
append_value(&mut field, self.size, 8);
append_value(&mut field, local_header_offset, 8);
append_0(&mut field, 4); // File starts on disk 0, there's no other disk
field.append(&mut vec![
@ -126,7 +126,7 @@ impl UploadedFile {
field
}
fn local_header(&self, local_header_offset: usize) -> Vec<u8> {
fn local_header(&self, local_header_offset: u64) -> Vec<u8> {
let mut header = vec![0x50, 0x4b, 0x03, 0x04]; // Local file header signature
header.append(&mut self.shared_header_fields(None));
header.append(&mut self.name.clone().into_bytes());
@ -134,7 +134,7 @@ impl UploadedFile {
header
}
fn central_directory_header(&self, local_header_offset: usize, hash: u32) -> Vec<u8> {
fn central_directory_header(&self, local_header_offset: u64, hash: u32) -> Vec<u8> {
let mut header = vec![
0x50, 0x4b, 0x01, 0x02, // Central directory file header signature
45, 3, // Made by a Unix system supporting version 4.5
@ -152,15 +152,15 @@ impl UploadedFile {
let mut descriptor = vec![0x50, 0x4b, 0x07, 0x08]; // Data descriptor signature
append_value(&mut descriptor, hash as u64, 4);
// Compressed and uncompressed sizes
append_value(&mut descriptor, self.size as u64, 8);
append_value(&mut descriptor, self.size as u64, 8);
append_value(&mut descriptor, self.size, 8);
append_value(&mut descriptor, self.size, 8);
descriptor
}
}
fn end_of_central_directory(files: &[UploadedFile]) -> Vec<u8> {
let entries_size = file_entries_size(files) as u64;
let directory_size = central_directory_size(files) as u64;
let entries_size = file_entries_size(files);
let directory_size = central_directory_size(files);
let mut eocd = vec![
0x50, 0x4b, 0x06, 0x06, // EOCD64 record signature
@ -190,18 +190,18 @@ fn end_of_central_directory(files: &[UploadedFile]) -> Vec<u8> {
eocd
}
pub struct ZipGenerator<'a> {
pub struct ZipGenerator<W: Write> {
files: Vec<UploadedFile>,
file_index: usize,
byte_index: usize,
byte_index: u64,
pending_metadata: Vec<u8>,
hasher: Hasher,
hashes: Vec<u32>,
output: Box<dyn LiveWriter + 'a>,
output: W,
}
impl<'a> ZipGenerator<'a> {
pub fn new(files: Vec<UploadedFile>, output: Box<dyn LiveWriter + 'a>) -> Self {
impl<W: Write> ZipGenerator<W> {
pub fn new(files: Vec<UploadedFile>, output: W) -> Self {
let mut result = Self {
files,
file_index: 0,
@ -215,7 +215,7 @@ impl<'a> ZipGenerator<'a> {
result
}
pub fn total_size(&self) -> usize {
pub fn total_size(&self) -> u64 {
zipfile_size(&self.files)
}
@ -225,7 +225,7 @@ impl<'a> ZipGenerator<'a> {
self.pending_metadata
.append(&mut self.files[self.file_index].data_descriptor(hash));
debug!(
"Finishing file entry in zipfile: {}, hash {}",
"Finishing file entry in zipfile: {}, hash {:x}",
self.files[self.file_index].name, hash
);
self.file_index += 1;
@ -243,7 +243,7 @@ impl<'a> ZipGenerator<'a> {
let mut local_header = self.files[self.file_index].local_header(offset);
let mut data_descriptor =
self.files[self.file_index].data_descriptor(EMPTY_STRING_CRC32);
offset += local_header.len() + data_descriptor.len();
offset += local_header.len() as u64 + data_descriptor.len() as u64;
self.file_index += 1;
self.pending_metadata.append(&mut local_header);
self.pending_metadata.append(&mut data_descriptor);
@ -279,13 +279,13 @@ impl<'a> ZipGenerator<'a> {
}
}
impl<'a> LiveWriter for ZipGenerator<'a> {
impl<W: LiveWriter> LiveWriter for ZipGenerator<W> {
fn add_waker(&mut self, waker: Waker) {
self.output.add_waker(waker);
}
}
impl<'a> Write for ZipGenerator<'a> {
impl<W: Write> Write for ZipGenerator<W> {
fn write(&mut self, mut buf: &[u8]) -> std::io::Result<usize> {
while !self.pending_metadata.is_empty() {
let result = self.output.write(self.pending_metadata.as_slice());
@ -302,14 +302,15 @@ impl<'a> Write for ZipGenerator<'a> {
return Ok(0);
}
let bytes_remaining = self.files[self.file_index].size - self.byte_index;
if bytes_remaining < buf.len() {
buf = &buf[..bytes_remaining];
if bytes_remaining < (buf.len() as u64) {
buf = &buf[..bytes_remaining as usize];
}
let result = self.output.write(buf);
match result {
Ok(0) | Err(_) => (),
Ok(n) => {
self.hasher.update(&buf[..n]);
let n = n as u64;
self.byte_index += n;
if n == bytes_remaining {
self.finish_file();