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Reimplement config parsing, add integration tests

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This commit is contained in:
Matteo Settenvini 2024-06-02 04:58:01 +02:00
parent ed3a1fbfe9
commit 4defbcec1f
13 changed files with 2122 additions and 619 deletions
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118
src/main.rs
View file

@ -1,72 +1,26 @@
// SPDX-FileCopyrightText: © Matteo Settenvini <matteo.settenvini@montecristosoftware.eu>
// SPDX-License-Identifier: EUPL-1.2
mod settings;
use {
anyhow::Result,
lazy_static::lazy_static,
rocket::response::Responder,
rocket::serde::Serialize,
rocket::{
fairing::AdHoc,
figment::{
providers::{Env, Format as _, Toml},
Profile,
},
response::Responder,
serde::Serialize,
State,
},
rocket_dyn_templates::{context, Template},
settings::Settings,
std::path::PathBuf,
};
struct Settings {
access_key_id: String,
secret_access_key: String,
bucket_name: String,
endpoint: String,
region: String,
}
lazy_static! {
static ref SETTINGS: Settings = {
let settings = config::Config::builder()
.add_source(config::File::with_name("Settings.toml"))
.add_source(config::Environment::with_prefix("SERVES3"))
.build()
.unwrap();
Settings {
access_key_id: settings
.get_string("access_key_id")
.expect("Missing configuration key access_key_id"),
secret_access_key: settings
.get_string("secret_access_key")
.expect("Missing configuration key secret_access_key"),
bucket_name: settings
.get_string("bucket")
.expect("Missing configuration key bucket"),
region: settings
.get_string("region")
.expect("Missing configuration key region"),
endpoint: settings
.get_string("endpoint")
.expect("Missing configuration key endpoint"),
}
};
static ref BUCKET: s3::bucket::Bucket = {
let region = s3::Region::Custom {
region: SETTINGS.region.clone(),
endpoint: SETTINGS.endpoint.clone(),
};
let credentials = s3::creds::Credentials::new(
Some(&SETTINGS.access_key_id),
Some(&SETTINGS.secret_access_key),
None,
None,
None,
)
.expect("Wrong server S3 configuration");
s3::bucket::Bucket::new(&SETTINGS.bucket_name, region, credentials)
.expect("Cannot find or authenticate to S3 bucket")
};
static ref FILEVIEW_TEMPLATE: &'static str = std::include_str!("../templates/index.html.tera");
// Workaround for https://github.com/SergioBenitez/Rocket/issues/1792
static ref EMPTY_DIR: tempfile::TempDir = tempfile::tempdir()
.expect("Unable to create an empty temporary folder, is the whole FS read-only?");
}
#[derive(Responder)]
enum FileView {
#[response(content_type = "text/html")]
@ -94,7 +48,7 @@ enum Error {
}
#[rocket::get("/<path..>")]
async fn index(path: PathBuf) -> Result<FileView, Error> {
async fn index(path: PathBuf, state: &State<Settings>) -> Result<FileView, Error> {
/*
The way things work in S3, the following holds for us:
- we need to use a slash as separator
@ -107,10 +61,10 @@ async fn index(path: PathBuf) -> Result<FileView, Error> {
we fallback to retrieving the equivalent folder.
*/
if let Ok(result) = s3_serve_file(&path).await {
if let Ok(result) = s3_serve_file(&path, &state).await {
Ok(result)
} else {
let objects = s3_fileview(&path).await?;
let objects = s3_fileview(&path, &state).await?;
let rendered = Template::render(
"index",
context! {
@ -122,7 +76,7 @@ async fn index(path: PathBuf) -> Result<FileView, Error> {
}
}
async fn s3_serve_file(path: &PathBuf) -> Result<FileView, Error> {
async fn s3_serve_file(path: &PathBuf, settings: &Settings) -> Result<FileView, Error> {
let is_root_prefix = path.as_os_str().is_empty();
if is_root_prefix {
return Err(Error::NotFound("Root prefix is not a file".into()));
@ -130,7 +84,8 @@ async fn s3_serve_file(path: &PathBuf) -> Result<FileView, Error> {
// FIXME: this can be big, we should use streaming,
// not loading in memory!
let response = BUCKET
let response = settings
.s3_bucket
.get_object(format!("{}", path.display()))
.await
.map_err(|_| Error::UnknownError("Unable to connect to S3 bucket".into()))?;
@ -145,7 +100,7 @@ async fn s3_serve_file(path: &PathBuf) -> Result<FileView, Error> {
}
}
async fn s3_fileview(path: &PathBuf) -> Result<Vec<FileViewItem>, Error> {
async fn s3_fileview(path: &PathBuf, settings: &Settings) -> Result<Vec<FileViewItem>, Error> {
/*
if listing a folder:
- folders will be under 'common_prefixes'
@ -158,8 +113,9 @@ async fn s3_fileview(path: &PathBuf) -> Result<Vec<FileViewItem>, Error> {
None => "".into(),
};
let s3_objects = BUCKET
.list(s3_folder_path.clone(), Some("/".into()))
let s3_objects = settings
.s3_bucket
.list(s3_folder_path, Some("/".into()))
.await
.map_err(|_| Error::NotFound("Object not found".into()))?;
@ -223,27 +179,35 @@ fn size_bytes_to_human(bytes: u64) -> String {
)
}
lazy_static! {
// Workaround for https://github.com/SergioBenitez/Rocket/issues/1792
static ref EMPTY_DIR: tempfile::TempDir = tempfile::tempdir()
.expect("Unable to create an empty temporary folder, is the whole FS read-only?");
}
#[rocket::launch]
fn rocket() -> _ {
eprintln!("Proxying to {} for {}", BUCKET.host(), BUCKET.name());
let config_figment = rocket::Config::figment().merge(("template_dir", EMPTY_DIR.path())); // We compile the templates in anyway.
let config_figment = rocket::Config::figment()
.merge(Toml::file("serves3.toml").nested())
.merge(Env::prefixed("SERVES3_").global())
.merge(("template_dir", EMPTY_DIR.path())) // We compile the templates in anyway
.select(Profile::from_env_or("SERVES3_PROFILE", "default"));
rocket::custom(config_figment)
.mount("/", rocket::routes![index])
.attach(AdHoc::config::<Settings>())
.attach(Template::custom(|engines| {
engines
.tera
.add_raw_template("index", *FILEVIEW_TEMPLATE)
.add_raw_template("index", std::include_str!("../templates/index.html.tera"))
.unwrap()
}))
}
// Test section starts
// -------------------------------------------------------------
#[cfg(test)]
mod tests {
use super::*;
use rstest::rstest;
#[rstest]
@ -254,9 +218,7 @@ mod tests {
#[case(0, "0.000 B")]
#[case(u64::MAX, format!("{:.3} GB",u64::MAX as f64/(1_000_000_000.0)))]
#[case(u64::MIN, format!("{:.3} B",u64::MIN as f64))]
fn test_size_bytes_to_human(#[case] bytes: u64, #[case] expected: String) {
println!("{}", size_bytes_to_human(bytes));
assert_eq!(size_bytes_to_human(bytes), expected);
fn size_bytes_to_human(#[case] bytes: u64, #[case] expected: String) {
assert_eq!(super::size_bytes_to_human(bytes), expected);
}
}

67
src/settings.rs Normal file
View file

@ -0,0 +1,67 @@
// SPDX-FileCopyrightText: © Matteo Settenvini <matteo.settenvini@montecristosoftware.eu>
// SPDX-License-Identifier: EUPL-1.2
use {anyhow::anyhow, rocket::serde::Deserialize, serde::de::Error};
#[derive(Deserialize)]
#[serde(crate = "rocket::serde")]
pub struct Settings {
#[serde(deserialize_with = "deserialize_s3_bucket")]
pub s3_bucket: s3::Bucket,
}
fn deserialize_s3_bucket<'de, D>(deserializer: D) -> Result<s3::Bucket, D::Error>
where
D: serde::Deserializer<'de>,
{
let config = S3Config::deserialize(deserializer)?;
config.try_into().map_err(D::Error::custom)
}
#[derive(Deserialize)]
pub struct S3Config {
pub name: String,
pub endpoint: String,
pub region: String,
#[serde(default)]
pub path_style: bool,
pub access_key_id: String,
pub secret_access_key: String,
}
impl TryInto<s3::Bucket> for S3Config {
type Error = anyhow::Error;
fn try_into(self) -> Result<s3::Bucket, Self::Error> {
let region = s3::Region::Custom {
region: self.region,
endpoint: self.endpoint,
};
let credentials = s3::creds::Credentials::new(
Some(&self.access_key_id),
Some(&self.secret_access_key),
None,
None,
None,
)?;
log::info!(
"Serving contents from bucket {} at {}",
&self.name,
region.endpoint()
);
let bucket = s3::Bucket::new(&self.name, region, credentials).map_err(|e| anyhow!(e));
if self.path_style {
bucket.map(|mut b| {
b.set_path_style();
b
})
} else {
bucket
}
}
}