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//! static file handling
//!
//! Reads files from the filesystem and prepares a `Response` for them.
use axum::{body::Body, response::Response};
use tokio_util::io::ReaderStream;
use crate::{
RuntimeError,
fs::{self, Mimetype, RequestPath},
};
/// 5 MiB
///
/// Files smaller than this size will be read into memory before being
/// sent back to the client.
const STREAM_AFTER: u64 = 1024 * 1024 * 5;
pub async fn send_or_stream_file(path: RequestPath) -> Result<Response, RuntimeError> {
let meta = path.system_path().metadata()?;
if meta.len() > STREAM_AFTER {
tracing::trace!("File is large, Streaming");
stream_file(path).await
} else {
tracing::trace!("File is small, Sending");
send_file(path).await
}
}
pub async fn send_file(path: RequestPath) -> Result<Response, RuntimeError> {
let mime = path.guess_mime();
let body = match mime.mimetype() {
Mimetype::Text => {
let text = fs::read_file_to_string(path.system_path()).await?;
Body::from(text)
}
Mimetype::Media => {
let data = fs::read_file(path.system_path()).await?;
Body::from(data)
}
};
Response::builder()
.status(200)
.header("Content-Type", mime.as_ref())
.body(body)
.map_err(|_| RuntimeError::unknown())
}
pub async fn stream_file(path: RequestPath) -> Result<Response, RuntimeError> {
let mime = path.guess_mime();
let file = fs::open_file(path.system_path()).await?;
let stream = ReaderStream::new(file);
Response::builder()
.status(200)
.header("Content-Type", mime.as_ref())
.body(Body::from_stream(stream))
.map_err(|_| RuntimeError::unknown())
}
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