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authorAlex Auvolat <alex@adnab.me>2022-01-06 12:55:49 +0100
committerAlex Auvolat <alex@adnab.me>2022-01-13 14:25:19 +0100
commitd4dd2e2640af9290717b669c923d1ca75dba1bde (patch)
tree3059e62b93939242b78714624405b0a4500f5b50 /src/web
parent9eb211948ec54430170e981201fe33b3997e2da5 (diff)
downloadgarage-d4dd2e2640af9290717b669c923d1ca75dba1bde.tar.gz
garage-d4dd2e2640af9290717b669c923d1ca75dba1bde.zip
Make use of website config, return error document on error
Diffstat (limited to 'src/web')
-rw-r--r--src/web/web_server.rs128
1 files changed, 102 insertions, 26 deletions
diff --git a/src/web/web_server.rs b/src/web/web_server.rs
index 49e5f21b..834f31e8 100644
--- a/src/web/web_server.rs
+++ b/src/web/web_server.rs
@@ -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);
+
+ 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);
+ }
- Ok(res)
+ // 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