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Many S3 compatibility improvements:

Browse source 
- return XML errors
- implement AuthorizationHeaderMalformed error to redirect clients to
  correct location (used by minio client)
- implement GetBucketLocation
- fix DeleteObjects XML parsing and response
This commit is contained in:
Alex Auvolat 2021-04-28 01:05:40 +02:00
parent 368eb35484
commit dcfc32cf85
No known key found for this signature in database
GPG key ID: EDABF9711E244EB1
6 changed files with 98 additions and 16 deletions
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20
src/api/api_server.rs
View file

@ -14,6 +14,7 @@ use garage_model::garage::Garage;
use crate::error::*;
use crate::signature::check_signature;
use crate::s3_bucket::*;
use crate::s3_copy::*;
use crate::s3_delete::*;
use crate::s3_get::*;
@ -52,17 +53,21 @@ async fn handler(
req: Request<Body>,
addr: SocketAddr,
) -> Result<Response<Body>, GarageError> {
info!("{} {} {}", addr, req.method(), req.uri());
let uri = req.uri().clone();
info!("{} {} {}", addr, req.method(), uri);
debug!("{:?}", req);
match handler_inner(garage, req).await {
match handler_inner(garage.clone(), req).await {
Ok(x) => {
debug!("{} {:?}", x.status(), x.headers());
Ok(x)
}
Err(e) => {
let body: Body = Body::from(format!("{}\n", e));
let mut http_error = Response::new(body);
*http_error.status_mut() = e.http_status_code();
let body: Body = Body::from(e.aws_xml(&garage.config.s3_api.s3_region, uri.path()));
let http_error = Response::builder()
.status(e.http_status_code())
.header("Content-Type", "application/xml")
.body(body)?;
if e.http_status_code().is_server_error() {
warn!("Response: error {}, {}", e.http_status_code(), e);
} else {
@ -211,10 +216,15 @@ async fn handler_inner(garage: Arc<Garage>, req: Request<Body>) -> Result<Respon
))
}
&Method::GET => {
if params.contains_key("location") {
// GetBucketLocation call
Ok(handle_get_bucket_location(garage)?)
} else {
// ListObjects or ListObjectsV2 query
let q = parse_list_objects_query(bucket, &params)?;
Ok(handle_list(garage, &q).await?)
}
}
&Method::POST => {
if params.contains_key(&"delete".to_string()) {
// DeleteObjects

31
src/api/error.rs
View file

@ -1,8 +1,12 @@
use std::fmt::Write;
use err_derive::Error;
use hyper::StatusCode;
use garage_util::error::Error as GarageError;
use crate::encoding::*;
/// Errors of this crate
#[derive(Debug, Error)]
pub enum Error {
@ -24,6 +28,10 @@ pub enum Error {
#[error(display = "Forbidden: {}", _0)]
Forbidden(String),
/// Authorization Header Malformed
#[error(display = "Authorization header malformed, expected scope: {}", _0)]
AuthorizationHeaderMalformed(String),
/// The object requested don't exists
#[error(display = "Not found")]
NotFound,
@ -77,6 +85,29 @@ impl Error {
_ => StatusCode::BAD_REQUEST,
}
}
pub fn aws_code(&self) -> &'static str {
match self {
Error::NotFound => "NoSuchKey",
Error::Forbidden(_) => "AccessDenied",
Error::AuthorizationHeaderMalformed(_) => "AuthorizationHeaderMalformed",
Error::InternalError(GarageError::RPC(_)) => "ServiceUnavailable",
Error::InternalError(_) | Error::Hyper(_) | Error::HTTP(_) => "InternalError",
_ => "InvalidRequest",
}
}
pub fn aws_xml(&self, garage_region: &str, path: &str) -> String {
let mut xml = String::new();
writeln!(&mut xml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
writeln!(&mut xml, "<Error>").unwrap();
writeln!(&mut xml, "\t<Code>{}</Code>", self.aws_code()).unwrap();
writeln!(&mut xml, "\t<Message>{}</Message>", self).unwrap();
writeln!(&mut xml, "\t<Resource>{}</Resource>", xml_escape(path)).unwrap();
writeln!(&mut xml, "\t<Region>{}</Region>", garage_region).unwrap();
writeln!(&mut xml, "</Error>").unwrap();
xml
}
}
/// Trait to map error to the Bad Request error code

1
src/api/lib.rs
View file

@ -12,6 +12,7 @@ pub use api_server::run_api_server;
mod signature;
mod s3_bucket;
mod s3_copy;
mod s3_delete;
pub mod s3_get;

24
src/api/s3_bucket.rs Normal file
View file

@ -0,0 +1,24 @@
use std::fmt::Write;
use std::sync::Arc;
use hyper::{Body, Response};
use garage_model::garage::Garage;
use crate::error::*;
pub fn handle_get_bucket_location(garage: Arc<Garage>) -> Result<Response<Body>, Error> {
let mut xml = String::new();
writeln!(&mut xml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
writeln!(
&mut xml,
r#"<LocationConstraint xmlns="http://s3.amazonaws.com/doc/2006-03-01/">{}</LocationConstraint>"#,
garage.config.s3_api.s3_region
)
.unwrap();
Ok(Response::builder()
.header("Content-Type", "application/xml")
.body(Body::from(xml.into_bytes()))?)
}

23
src/api/s3_delete.rs
View file

@ -85,11 +85,18 @@ pub async fn handle_delete_objects(
let mut retxml = String::new();
writeln!(&mut retxml, r#"<?xml version="1.0" encoding="UTF-8"?>"#).unwrap();
writeln!(&mut retxml, "<DeleteObjectsOutput>").unwrap();
writeln!(
&mut retxml,
r#"<DeleteResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">"#
)
.unwrap();
for obj in cmd.objects.iter() {
match handle_delete_internal(&garage, bucket, &obj.key).await {
Ok((deleted_version, delete_marker_version)) => {
if cmd.quiet {
continue;
}
writeln!(&mut retxml, "\t<Deleted>").unwrap();
writeln!(&mut retxml, "\t\t<Key>{}</Key>", xml_escape(&obj.key)).unwrap();
writeln!(
@ -121,7 +128,7 @@ pub async fn handle_delete_objects(
}
}
writeln!(&mut retxml, "</DeleteObjectsOutput>").unwrap();
writeln!(&mut retxml, "</DeleteResult>").unwrap();
Ok(Response::builder()
.header("Content-Type", "application/xml")
@ -129,6 +136,7 @@ pub async fn handle_delete_objects(
}
struct DeleteRequest {
quiet: bool,
objects: Vec<DeleteObject>,
}
@ -137,7 +145,10 @@ struct DeleteObject {
}
fn parse_delete_objects_xml(xml: &roxmltree::Document) -> Option<DeleteRequest> {
let mut ret = DeleteRequest { objects: vec![] };
let mut ret = DeleteRequest {
quiet: false,
objects: vec![],
};
let root = xml.root();
let delete = root.first_child()?;
@ -153,6 +164,12 @@ fn parse_delete_objects_xml(xml: &roxmltree::Document) -> Option<DeleteRequest>
ret.objects.push(DeleteObject {
key: key_str.to_string(),
});
} else if item.has_tag_name("Quiet") {
if item.text()? == "true" {
ret.quiet = true;
} else {
ret.quiet = false;
}
} else {
return None;
}

9
src/api/signature.rs
View file

@ -58,10 +58,7 @@ pub async fn check_signature(
garage.config.s3_api.s3_region
);
if authorization.scope != scope {
return Err(Error::BadRequest(format!(
"Invalid scope in authorization field, expected: {}",
scope
)));
return Err(Error::AuthorizationHeaderMalformed(scope.to_string()));
}
let key = garage
@ -101,7 +98,9 @@ pub async fn check_signature(
return Err(Error::Forbidden(format!("Invalid signature")));
}
let content_sha256 = if authorization.content_sha256 == "UNSIGNED-PAYLOAD" {
let content_sha256 = if authorization.content_sha256 == "UNSIGNED-PAYLOAD"
|| authorization.content_sha256 == "STREAMING-AWS4-HMAC-SHA256-PAYLOAD"
{
None
} else {
let bytes = hex::decode(authorization.content_sha256)