s3 storage backend replacement

This commit is contained in:
Paul Zinselmeyer 2023-06-05 22:53:55 +02:00
parent 463c1b08e2
commit 0f5f4e7f8c
5 changed files with 654 additions and 323 deletions

503
Cargo.lock generated
View file

@ -37,6 +37,17 @@ dependencies = [
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checksum = "2047c6ded9c721764247e62cd3b03c09ffc529b2ba5b10ec482ae507a4a70160"
[[package]]
name = "termcolor"
version = "1.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "be55cf8942feac5c765c2c993422806843c9a9a45d4d5c407ad6dd2ea95eb9b6"
dependencies = [
"winapi-util",
]
[[package]]
name = "thiserror"
version = "1.0.40"
@ -1788,17 +2101,6 @@ dependencies = [
"syn 2.0.18",
]
[[package]]
name = "time"
version = "0.1.45"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
dependencies = [
"libc",
"wasi 0.10.0+wasi-snapshot-preview1",
"winapi",
]
[[package]]
name = "time"
version = "0.3.21"
@ -1877,7 +2179,18 @@ version = "0.24.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e0d409377ff5b1e3ca6437aa86c1eb7d40c134bfec254e44c830defa92669db5"
dependencies = [
"rustls",
"rustls 0.21.1",
"tokio",
]
[[package]]
name = "tokio-stream"
version = "0.1.14"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "397c988d37662c7dda6d2208364a706264bf3d6138b11d436cbac0ad38832842"
dependencies = [
"futures-core",
"pin-project-lite",
"tokio",
]
@ -2039,12 +2352,6 @@ dependencies = [
"try-lock",
]
[[package]]
name = "wasi"
version = "0.10.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
[[package]]
name = "wasi"
version = "0.11.0+wasi-snapshot-preview1"
@ -2117,6 +2424,19 @@ version = "0.2.86"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ed9d5b4305409d1fc9482fee2d7f9bcbf24b3972bf59817ef757e23982242a93"
[[package]]
name = "wasm-streams"
version = "0.2.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6bbae3363c08332cadccd13b67db371814cd214c2524020932f0804b8cf7c078"
dependencies = [
"futures-util",
"js-sys",
"wasm-bindgen",
"wasm-bindgen-futures",
"web-sys",
]
[[package]]
name = "web-sys"
version = "0.3.63"
@ -2162,6 +2482,15 @@ version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
[[package]]
name = "winapi-util"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
dependencies = [
"winapi",
]
[[package]]
name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"

View file

@ -7,7 +7,7 @@ edition = "2021"
[dependencies]
tokio = { version = "1.27.0", features = ["full"] }
tokio-util = { version="0.7", features=["io"]}
tokio-util = { version="0.7"}
futures-util = "0.3"
axum = {version="0.6", features=["macros", "headers"]}
serde = "1.0"
@ -17,6 +17,7 @@ thiserror = "1.0.40"
rand = "0.8.5"
dotenvy = "0.15"
markdown = "0.3.0"
chrono = { version="0.4", features=["serde"]}
parse_duration = "2.1"
axum_oidc = {git="https://git.zettoit.eu/pfz4/axum_oidc"}
rust-s3 = { version="0.33.0", features=["tokio-rustls-tls", "tags"], default_features=false }
log = "0.4.18"
pretty_env_logger = "0.5.0"

View file

@ -4,7 +4,7 @@ All following requests can only read the uploaded data.
To use the build-in link-shortener functionality you have to POST or PUT the URL with Content-Type: text/x-uri or Content-Type: text/uri-list.
To change the default expiration date of one month, you can use the `?ttl=` parameter. It supports durations like `60s`, `60m`, `24h`, `30d`, `12M`, `1y` or iso dates like `1970-01-01T00:00:00` in UTC timezone.
To change the default expiration date, you can use the `?ttl=` parameter. The following expiry classes are defined: <lifecycle_classes>.
## Upload a link
`$ curl -H "Content-Type: text/x-uri" --data "https://example.com" <bin_url>`

View file

@ -1,7 +1,14 @@
use std::{collections::BTreeMap, env, str::FromStr, sync::Arc, time::Duration};
use std::{
collections::HashSet,
env,
io::ErrorKind,
task::{Context, Poll},
time::Duration,
};
use axum::{
body::StreamBody,
body::{Bytes, StreamBody},
debug_handler,
extract::{BodyStream, FromRef, Path, Query, State},
headers::ContentType,
http::{header, HeaderMap, StatusCode},
@ -10,36 +17,32 @@ use axum::{
Router, TypedHeader,
};
use axum_oidc::{ClaimsExtractor, EmptyAdditionalClaims, Key, OidcApplication};
use chrono::{NaiveDateTime, Utc};
use futures_util::StreamExt;
use metadata::Metadata;
use futures_util::{Stream, StreamExt, TryStreamExt};
use log::{info, warn};
use rand::{distributions::Alphanumeric, Rng};
use render::{html, raw};
use s3::{creds::Credentials, error::S3Error, request::ResponseDataStream, Bucket};
use serde::Deserialize;
use tokio::{
fs::{self, File},
io::{AsyncReadExt, AsyncWriteExt},
sync::Mutex,
};
use tokio_util::io::ReaderStream;
pub mod metadata;
use tokio_util::io::StreamReader;
// RFC 7230 section 3.1.1
// It is RECOMMENDED that all HTTP senders and recipients
// support, at a minimum, request-line lengths of 8000 octets.
const HTTP_URL_MAXLENGTH: u64 = 8000;
const HTTP_URL_MAXLENGTH: i64 = 8000;
// support the RFC2483 with text/uri-list and the inofficial text/x-uri mimetype
const HTTP_URL_MIMETYPES: [&str; 2] = ["text/x-uri", "text/uri-list"];
#[derive(Debug, thiserror::Error)]
enum Error {
#[error("s3 error: {:?}", 1)]
S3(#[from] S3Error),
#[error("url is invalid utf8")]
UrlUtf8Invalid,
#[error("item could not be found")]
ItemNotFound,
#[error("errorfile exists")]
#[error("file exists")]
DataFileExists,
#[error("datafile without metafile")]
DataFileWithoutMetaFile,
#[error("could not parse ttl")]
ParseTtl,
@ -49,13 +52,14 @@ type HandlerResult<T> = Result<T, Error>;
impl IntoResponse for Error {
fn into_response(self) -> axum::response::Response {
match self {
Self::ItemNotFound => (StatusCode::NOT_FOUND, "item could not be found"),
Self::DataFileExists => (StatusCode::CONFLICT, "item already has data"),
Self::DataFileWithoutMetaFile => {
println!("WARN: a data file without meta file exists.");
(StatusCode::INTERNAL_SERVER_ERROR, "internal server error")
Self::S3(e) => {
warn!("S3 Error: {:?}", e);
(StatusCode::INTERNAL_SERVER_ERROR, "s3 error")
}
Self::ParseTtl => (StatusCode::BAD_REQUEST, "could not parse ttl"),
Self::UrlUtf8Invalid => (StatusCode::INTERNAL_SERVER_ERROR, "url is not valid utf8"),
Self::ItemNotFound => (StatusCode::NOT_FOUND, "bin could not be found"),
Self::DataFileExists => (StatusCode::CONFLICT, "bin already has data"),
Self::ParseTtl => (StatusCode::BAD_REQUEST, "invalid ttl class"),
}
.into_response()
}
@ -63,10 +67,11 @@ impl IntoResponse for Error {
#[derive(Clone)]
pub struct AppState {
path: String,
application_base: String,
oidc_application: OidcApplication<EmptyAdditionalClaims>,
expire: Arc<Mutex<BTreeMap<NaiveDateTime, String>>>,
bucket: Bucket,
lifecycle_classes: HashSet<String>,
default_lifecycle_class: String,
}
impl FromRef<AppState> for OidcApplication<EmptyAdditionalClaims> {
@ -78,6 +83,7 @@ impl FromRef<AppState> for OidcApplication<EmptyAdditionalClaims> {
#[tokio::main]
async fn main() {
dotenvy::dotenv().ok();
pretty_env_logger::init();
let application_base = env::var("APPLICATION_BASE").expect("APPLICATION_BASE env var");
let issuer = env::var("ISSUER").expect("ISSUER env var");
@ -86,16 +92,9 @@ async fn main() {
let scopes = env::var("SCOPES")
.expect("SCOPES env var")
.split(' ')
.into_iter()
.map(|x| x.to_owned())
.collect::<Vec<_>>();
let expire = Arc::new(Mutex::new(BTreeMap::new()));
{
let mut expire = expire.lock().await;
load_expire("data", &mut expire).await;
}
let oidc_application = OidcApplication::<EmptyAdditionalClaims>::create(
application_base.parse().unwrap(),
issuer.to_string(),
@ -107,15 +106,44 @@ async fn main() {
.await
.unwrap();
let bucket = Bucket::new(
&env::var("S3_BUCKET").expect("S3_BUCKET env var"),
env::var("S3_REGION")
.expect("S3_REGION env var")
.parse()
.unwrap(),
Credentials::new(
Some(&env::var("S3_ACCESS_KEY").expect("S3_ACCESS_KEY env var")),
Some(&env::var("S3_SECRET_KEY").expect("S3_SECRET_KEY env var")),
None,
None,
None,
)
.unwrap(),
)
.unwrap()
.with_path_style()
.with_request_timeout(Duration::from_secs(60 * 60 * 6));
let lifecycle_classes = std::env::var("LIFECYCLE_CLASSES")
.expect("LIFECYCLE_CLASSES env var")
.split(',')
.map(|x| x.to_string())
.collect::<HashSet<String>>();
let default_lifecycle_class =
std::env::var("DEFAULT_LIFECYCLE_CLASS").expect("DEFAULT_LIFECYCLE_CLASS env var");
if !lifecycle_classes.contains(&default_lifecycle_class) {
panic!("DEFAULT_LIFECYCLE_CLASS must be an element of LIFECYCLE_CLASSES");
}
let state: AppState = AppState {
path: "data".to_string(),
application_base,
oidc_application,
expire: expire.clone(),
bucket,
lifecycle_classes,
default_lifecycle_class,
};
tokio::spawn(async move { expire_thread("data".to_string(), expire).await });
let app = Router::new()
.route("/", get(get_index))
.route("/:id", get(get_item).post(post_item).put(post_item))
@ -129,12 +157,34 @@ async fn main() {
async fn get_index(
State(app_state): State<AppState>,
ClaimsExtractor(claims): ClaimsExtractor<EmptyAdditionalClaims>,
) -> impl IntoResponse {
) -> Result<impl IntoResponse, Error> {
let subject = claims.subject().to_string();
let (id, _) = Metadata::create(&app_state.path, subject).await.unwrap();
//generate id
let id = rand::thread_rng()
.sample_iter(Alphanumeric)
.take(8)
.map(char::from)
.collect::<String>();
Redirect::temporary(&format!("{}{}", app_state.application_base, id))
app_state.bucket.put_object(&id, &[]).await?;
app_state
.bucket
.put_object_tagging(
&id,
&[
("ttl".to_string(), app_state.default_lifecycle_class.clone()),
("subject".to_string(), subject),
],
)
.await?;
info!("created bin {id}");
Ok(Redirect::temporary(&format!(
"{}{}",
app_state.application_base, id
)))
}
#[derive(Deserialize)]
@ -147,68 +197,102 @@ async fn post_item(
Query(params): Query<PostQuery>,
State(app_state): State<AppState>,
content_type: Option<TypedHeader<ContentType>>,
mut stream: BodyStream,
stream: BodyStream,
) -> HandlerResult<impl IntoResponse> {
let id = sanitize_id(id);
let mut metadata = Metadata::from_file(&app_state.path, &id)
.await
.map_err(|_| Error::ItemNotFound)?;
let metadata = app_state.bucket.head_object(&id).await?.0;
if fs::metadata(&format!("{}/{}.data", app_state.path, &id))
.await
.is_err()
{
let expires_at = if let Some(ttl) = params.ttl {
if let Ok(duration) = parse_duration::parse(&ttl) {
Ok(Utc::now().naive_utc() + chrono::Duration::from_std(duration).unwrap())
} else if let Ok(ttl) = chrono::NaiveDateTime::from_str(&ttl) {
Ok(ttl)
} else {
Err(Error::ParseTtl)
if metadata.e_tag.is_none() {
return Err(Error::ItemNotFound);
}
if let Some(content_length) = metadata.content_length {
if content_length > 0 {
return Err(Error::DataFileExists);
}
}
let ttl = if let Some(ttl) = &params.ttl {
if !app_state.lifecycle_classes.contains(ttl) {
return Err(Error::ParseTtl);
}
ttl
} else {
Ok(Utc::now().naive_utc() + chrono::Duration::days(30))
&app_state.default_lifecycle_class
};
let tags = app_state.bucket.get_object_tagging(&id).await?.0;
let mut reader =
StreamReader::new(stream.map_err(|e| std::io::Error::new(ErrorKind::Other, e.to_string())));
let status_code = match content_type {
Some(content_type) => {
app_state
.bucket
.put_object_stream_with_content_type(&mut reader, &id, &content_type.to_string())
.await
}
None => app_state.bucket.put_object_stream(&mut reader, &id).await,
}?;
let mut data_file = File::create(&format!("{}/{}.data", app_state.path, &id))
.await
.unwrap();
let status_code = StatusCode::from_u16(status_code).unwrap();
while let Some(chunk) = stream.next().await {
let buf = chunk.map(|x| x.to_vec()).unwrap_or_default();
data_file.write_all(&buf).await.unwrap();
let subject = tags
.iter()
.find(|x| x.key() == "subject")
.map(|x| x.value())
.unwrap_or_default();
app_state
.bucket
.put_object_tagging(
&id,
&[
("ttl".to_string(), ttl.to_string()),
("subject".to_string(), subject),
],
)
.await?;
info!("bin {id} is now read only");
Ok((
status_code,
format!(
"{}\n",
status_code
.canonical_reason()
.unwrap_or(&status_code.to_string())
),
))
}
metadata.mimetype = content_type.map(|x| x.0.to_string());
metadata.ttl = Some(expires_at);
metadata.to_file(&app_state.path, &id).await.unwrap();
app_state.expire.lock().await.insert(expires_at, id);
Ok((StatusCode::CREATED, "OK"))
} else {
Err(Error::DataFileExists)
}
}
#[debug_handler]
async fn get_item(
Path(id): Path<String>,
State(app_state): State<AppState>,
) -> HandlerResult<impl IntoResponse> {
let id = sanitize_id(id);
let metadata = Metadata::from_file(&app_state.path, &id).await.ok();
let metadata = app_state.bucket.head_object(&id).await?.0;
let data_file = File::open(&format!("{}/{}.data", app_state.path, &id))
.await
.ok();
match (metadata, data_file) {
(None, None) => Err(Error::ItemNotFound),
(Some(_), None) => {
let body = include_str!("item_explanation.md").replace(
if metadata.e_tag.is_none() {
return Err(Error::ItemNotFound);
}
if metadata.content_length.is_none() || metadata.content_length == Some(0) {
let body = include_str!("item_explanation.md")
.replace(
"<bin_url>",
&format!("{}{}", app_state.application_base, id),
)
.replace(
"<lifecycle_classes>",
&app_state
.lifecycle_classes
.iter()
.map(|x| x.to_string())
.reduce(|acc, e| acc + ", " + e.as_str())
.unwrap_or_default(),
);
let body = markdown::to_html(&body);
let body = html! {
@ -225,48 +309,49 @@ async fn get_item(
</html>
};
Ok((StatusCode::ACCEPTED, Html(body)).into_response())
}
(Some(metadata), Some(mut data_file)) => {
let data_file_metadata = fs::metadata(&format!("{}/{}.data", app_state.path, &id))
.await
.unwrap();
if HTTP_URL_MIMETYPES.contains(&metadata.mimetype.as_deref().unwrap_or(""))
&& data_file_metadata.len() <= HTTP_URL_MAXLENGTH
} else if let Some(content_length) = metadata.content_length {
if HTTP_URL_MIMETYPES.contains(&metadata.content_type.as_deref().unwrap_or(""))
&& content_length <= HTTP_URL_MAXLENGTH
{
let mut url = String::new();
data_file.read_to_string(&mut url).await.unwrap();
let file = app_state.bucket.get_object(&id).await?;
let url = String::from_utf8(file.to_vec()).map_err(|_| Error::UrlUtf8Invalid)?;
// Use the first line that doesn't start with a # to be compliant with RFC2483.
let url = url
.lines()
.into_iter()
.find(|x| !x.starts_with('#'))
.unwrap_or("");
let url = url.lines().find(|x| !x.starts_with('#')).unwrap_or("");
Ok(Redirect::temporary(url).into_response())
} else {
let reader = ReaderStream::new(data_file);
let body = StreamBody::new(reader);
let file_stream = app_state.bucket.get_object_stream(&id).await.unwrap();
let body = StreamBody::new(ResponseStream(std::sync::Mutex::new(file_stream)));
let mut headers = HeaderMap::new();
headers.insert(
header::CONTENT_TYPE,
metadata
.mimetype
.as_deref()
.unwrap_or("text/plain")
.parse()
.unwrap(),
);
headers.insert(
header::CONTENT_LENGTH,
data_file_metadata.len().to_string().parse().unwrap(),
metadata.content_length.unwrap().into(),
);
if let Some(content_type) = metadata.content_type {
headers.insert(header::CONTENT_TYPE, content_type.parse().unwrap());
}
if let Some(etag) = metadata.e_tag {
headers.insert(header::ETAG, etag.parse().unwrap());
}
if let Some(content_encoding) = metadata.content_encoding {
headers.insert(header::CONTENT_ENCODING, content_encoding.parse().unwrap());
}
if let Some(content_language) = metadata.content_language {
headers.insert(header::CONTENT_LANGUAGE, content_language.parse().unwrap());
}
if let Some(cache_control) = metadata.cache_control {
headers.insert(header::CACHE_CONTROL, cache_control.parse().unwrap());
}
Ok((StatusCode::OK, headers, body).into_response())
}
}
(None, Some(_)) => Err(Error::DataFileWithoutMetaFile),
} else {
// logically should not happen
panic!("logic contradiction");
}
}
@ -277,42 +362,17 @@ fn sanitize_id(id: String) -> String {
.collect()
}
async fn expire_thread(path: String, expire_dates: Arc<Mutex<BTreeMap<NaiveDateTime, String>>>) {
loop {
{
let now = Utc::now().naive_utc();
let mut expire_dates = expire_dates.lock().await;
let mut to_delete = vec![];
for (expire, id) in expire_dates.iter() {
if expire < &now {
println!("removing {id}");
fs::remove_file(&format!("{}/{}.meta", &path, &id))
.await
.unwrap();
let _ = fs::remove_file(&format!("{}/{}.data", &path, &id)).await;
struct ResponseStream(std::sync::Mutex<ResponseDataStream>);
impl Stream for ResponseStream {
type Item = Result<Bytes, Error>;
to_delete.push(*expire);
} else {
break;
}
}
for expire in to_delete.iter() {
expire_dates.remove(expire);
}
}
tokio::time::sleep(Duration::from_secs(1)).await;
}
}
async fn load_expire(path: &str, expire: &mut BTreeMap<NaiveDateTime, String>) {
let mut files = fs::read_dir(path).await.unwrap();
while let Some(file) = files.next_entry().await.unwrap() {
let name = file.file_name().into_string().unwrap_or(String::new());
if name.ends_with(".meta") {
let id = name.replace(".meta", "");
let metadata = Metadata::from_file(path, &id).await.unwrap();
if let Some(ttl) = metadata.ttl {
expire.insert(ttl, id);
}
}
fn poll_next(self: std::pin::Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
self.0
.lock()
.unwrap()
.bytes()
.poll_next_unpin(cx)
.map(|x| x.map(Ok))
}
}
unsafe impl Send for ResponseStream {}

View file

@ -1,59 +0,0 @@
use chrono::{NaiveDateTime, Utc};
use rand::{distributions::Alphanumeric, Rng};
use serde::{Deserialize, Serialize};
use tokio::{
fs::File,
io::{AsyncReadExt, AsyncWriteExt},
};
#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error("io error {:?}", 0)]
Io(#[from] tokio::io::Error),
#[error("cbor error: {:?}", 0)]
Cbor(#[from] serde_cbor::Error),
}
#[derive(Serialize, Deserialize)]
pub struct Metadata {
pub subject: String,
pub ttl: Option<NaiveDateTime>,
pub mimetype: Option<String>,
pub sha256: Option<String>,
pub sha512: Option<String>,
}
impl Metadata {
pub async fn create(path: &str, subject: String) -> Result<(String, Self), Error> {
let id = rand::thread_rng()
.sample_iter(Alphanumeric)
.take(8)
.map(char::from)
.collect::<String>();
let metadata = Metadata {
subject,
mimetype: None,
ttl: Some(Utc::now().naive_utc() + chrono::Duration::days(1)),
sha256: None,
sha512: None,
};
metadata.to_file(path, &id).await.unwrap();
Ok((id, metadata))
}
pub async fn from_file(path: &str, id: &str) -> Result<Self, Error> {
let mut metadata_file = File::open(&format!("{}/{}.meta", path, id)).await?;
let mut metadata = Vec::new();
metadata_file.read_to_end(&mut metadata).await.unwrap();
Ok(serde_cbor::from_slice(&metadata)?)
}
pub async fn to_file(&self, path: &str, id: &str) -> Result<(), Error> {
let metadata = serde_cbor::to_vec(self).unwrap();
let mut metadata_file = File::create(&format!("{}/{}.meta", path, id)).await?;
metadata_file.write_all(&metadata).await?;
Ok(())
}
}