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Make use of website config, return error document on error

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This commit is contained in:
Alex Auvolat 2022-01-06 12:55:49 +01:00
parent 9eb211948e
commit d4dd2e2640
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GPG Key ID: EDABF9711E244EB1
3 changed files with 103 additions and 29 deletions
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2
src/api/lib.rs
View File

@ -2,7 +2,7 @@
#[macro_use]
extern crate log;
mod error;
pub mod error;
pub use error::Error;
mod encoding;

2
src/util/config.rs
View File

@ -87,8 +87,6 @@ pub struct WebConfig {
pub bind_addr: SocketAddr,
/// Suffix to remove from domain name to find bucket
pub root_domain: String,
/// Suffix to add when user-agent request path end with "/"
pub index: String,
}
fn default_sled_cache_capacity() -> u64 {

128
src/web/web_server.rs
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@ -3,7 +3,7 @@ use std::{borrow::Cow, convert::Infallible, net::SocketAddr, sync::Arc};
use futures::future::Future;
use hyper::{
header::HOST,
header::{HeaderValue, HOST},
server::conn::AddrStream,
service::{make_service_fn, service_fn},
Body, Method, Request, Response, Server,
@ -11,10 +11,10 @@ use hyper::{
use crate::error::*;
use garage_api::error::{Error as ApiError, OkOrBadRequest};
use garage_api::helpers::{authority_to_host, host_to_bucket};
use garage_api::s3_get::{handle_get, handle_head};
use garage_model::bucket_table::Bucket;
use garage_model::garage::Garage;
use garage_table::*;
@ -52,29 +52,45 @@ async fn handle_request(
addr: SocketAddr,
) -> Result<Response<Body>, Infallible> {
info!("{} {} {}", addr, req.method(), req.uri());
let res = serve_file(garage, req).await;
match &res {
Ok(r) => debug!("{} {:?}", r.status(), r.headers()),
Err(e) => warn!("Response: error {}, {}", e.http_status_code(), e),
match serve_file(garage, &req).await {
Ok(res) => {
debug!("{} {} {}", req.method(), req.uri(), res.status());
Ok(res)
}
Err(error) => {
info!(
"{} {} {} {}",
req.method(),
req.uri(),
error.http_status_code(),
error
);
Ok(error_to_res(error))
}
}
Ok(res.unwrap_or_else(error_to_res))
}
fn error_to_res(e: Error) -> Response<Body> {
let body: Body = Body::from(format!("{}\n", e));
// If we are here, it is either that:
// - there was an error before trying to get the requested URL
// from the bucket (e.g. bucket not found)
// - there was an error processing the request and (the request
// was a HEAD request or we couldn't get the error document)
// We do NOT enter this code path when returning the bucket's
// error document (this is handled in serve_file)
let body = Body::from(format!("{}\n", e));
let mut http_error = Response::new(body);
*http_error.status_mut() = e.http_status_code();
e.add_headers(http_error.headers_mut());
http_error
}
async fn serve_file(garage: Arc<Garage>, req: Request<Body>) -> Result<Response<Body>, Error> {
async fn serve_file(garage: Arc<Garage>, req: &Request<Body>) -> Result<Response<Body>, Error> {
// Get http authority string (eg. [::1]:3902 or garage.tld:80)
let authority = req
.headers()
.get(HOST)
.ok_or_else(|| Error::BadRequest("HOST header required".to_owned()))?
.ok_or_bad_request("HOST header required")?
.to_str()?;
// Get bucket
@ -91,35 +107,95 @@ async fn serve_file(garage: Arc<Garage>, req: Request<Body>) -> Result<Response<
.ok_or(Error::NotFound)?;
// Check bucket isn't deleted and has website access enabled
let _: Bucket = garage
let bucket = garage
.bucket_table
.get(&EmptyKey, &bucket_id)
.await?
.filter(|b| {
b.state
.as_option()
.map(|x| x.website_config.get().is_some())
.unwrap_or(false)
})
.ok_or(Error::NotFound)?;
let website_config = bucket
.params()
.ok_or(Error::NotFound)?
.website_config
.get()
.as_ref()
.ok_or(Error::NotFound)?;
// Get path
let path = req.uri().path().to_string();
let index = &garage.config.s3_web.index;
let index = &website_config.index_document;
let key = path_to_key(&path, index)?;
info!(
debug!(
"Selected bucket: \"{}\" {:?}, selected key: \"{}\"",
bucket_name, bucket_id, key
);
let res = match *req.method() {
Method::HEAD => handle_head(garage, &req, bucket_id, &key).await?,
Method::GET => handle_get(garage, &req, bucket_id, &key).await?,
_ => return Err(Error::BadRequest("HTTP method not supported".to_string())),
};
let ret_doc = match *req.method() {
Method::HEAD => handle_head(garage.clone(), req, bucket_id, &key).await,
Method::GET => handle_get(garage.clone(), req, bucket_id, &key).await,
_ => Err(ApiError::BadRequest("HTTP method not supported".into())),
}
.map_err(Error::from);
Ok(res)
if let Err(error) = ret_doc {
if *req.method() == Method::HEAD || !error.http_status_code().is_client_error() {
// Do not return the error document in the following cases:
// - the error is not a 4xx error code
// - the request is a HEAD method
// In this case we just return the error code and the error message in the body,
// by relying on err_to_res that is called above when we return an Err.
return Err(error);
}
// Same if no error document is set: just return the error directly
let error_document = match &website_config.error_document {
Some(ed) => ed.trim_start_matches('/').to_owned(),
None => return Err(error),
};
// We want to return the error document
// Create a fake HTTP request with path = the error document
let req2 = Request::builder()
.uri(format!("http://{}/{}", host, &error_document))
.body(Body::empty())
.unwrap();
match handle_get(garage, &req2, bucket_id, &error_document).await {
Ok(mut error_doc) => {
// The error won't be logged back in handle_request,
// so log it here
info!(
"{} {} {} {}",
req.method(),
req.uri(),
error.http_status_code(),
error
);
*error_doc.status_mut() = error.http_status_code();
error.add_headers(error_doc.headers_mut());
// Preserve error message in a special header
for error_line in error.to_string().split('\n') {
if let Ok(v) = HeaderValue::from_bytes(error_line.as_bytes()) {
error_doc.headers_mut().append("X-Garage-Error", v);
}
}
Ok(error_doc)
}
Err(error_doc_error) => {
warn!(
"Couldn't get error document {} for bucket {:?}: {}",
error_document, bucket_id, error_doc_error
);
Err(error)
}
}
} else {
ret_doc
}
}
/// Path to key