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use std::ops::Add;
use std::path::{Path, PathBuf};
use chrono::Duration;
use futures_util::TryStreamExt;
use http_body_util::{combinators::BoxBody, BodyExt, Full, StreamBody};
use hyper::body::{Bytes, Frame, Incoming};
use hyper::header::{HeaderName, HeaderValue, CONTENT_DISPOSITION, CONTENT_LENGTH, CONTENT_TYPE};
use hyper::{Method, Request, Response, Result, StatusCode};
use tokio::io::AsyncWriteExt;
use tokio::{fs, fs::File};
use tokio_rusqlite::Connection;
use tokio_util::io::ReaderStream;
use crate::db;
use crate::model;
use crate::templates;
use crate::util;
pub async fn routes(
request: Request<Incoming>,
db_conn: Connection,
authorized_key: String,
files_dir: String,
) -> Result<Response<BoxBody<Bytes, std::io::Error>>> {
let path = &request.uri().path().split('/').collect::<Vec<&str>>()[1..];
let files_dir = Path::new(&files_dir);
match (request.method(), path) {
(&Method::GET, [""]) => {
Ok(with_headers(
response(StatusCode::OK, templates::INDEX.to_string()),
vec![(CONTENT_TYPE, "text/html")],
))
},
(&Method::GET, ["static", "main.js"]) => Ok(static_file(
include_str!("static/main.js").to_string(),
"application/javascript",
)),
(&Method::GET, ["static", "main.css"]) => Ok(static_file(
include_str!("static/main.css").to_string(),
"text/css",
)),
(&Method::POST, [""]) => upload_file(request, db_conn, authorized_key, files_dir).await,
(&Method::GET, [file_id]) => get(db_conn, file_id, GetFile::ShowPage, files_dir).await,
(&Method::GET, [file_id, "download"]) => {
get(db_conn, file_id, GetFile::Download, files_dir).await
}
_ => Ok(not_found()),
}
}
async fn upload_file(
request: Request<Incoming>,
db_conn: Connection,
authorized_key: String,
files_dir: &Path,
) -> Result<Response<BoxBody<Bytes, std::io::Error>>> {
let key = get_header(&request, "X-Key");
if key != Some(authorized_key) {
log::info!("Unauthorized file upload");
Ok(response(
StatusCode::UNAUTHORIZED,
"Unauthorized".to_string(),
))
} else {
let file_id = model::generate_file_id();
let filename = get_header(&request, "X-Filename").map(|s| util::sanitize_filename(&s));
let expiration_days: Option<i64> =
get_header(&request, "X-Expiration").and_then(|s| s.parse().ok());
let content_length: Option<usize> =
get_header(&request, "Content-Length").and_then(|s| s.parse().ok());
match (filename, expiration_days, content_length) {
(Some(filename), Some(expiration_days), Some(content_length)) => {
let _ = fs::create_dir(files_dir).await;
let path = files_dir.join(&file_id);
let mut file = File::create(&path).await.unwrap();
let mut incoming = request.into_body();
while let Some(frame) = incoming.frame().await {
if let Ok(data) = frame {
let _ = file.write_all(&data.into_data().unwrap()).await;
let _ = file.flush().await;
}
}
let file = model::File {
id: file_id.clone(),
name: filename,
expires_at: model::local_time().add(Duration::days(expiration_days)),
content_length,
};
match db::insert_file(&db_conn, file.clone()).await {
Ok(_) => Ok(response(StatusCode::OK, file_id)),
Err(msg) => {
log::error!("Insert file: {msg}");
if let Err(msg) = fs::remove_file(path).await {
log::error!("Remove file: {msg}");
};
Ok(internal_server_error())
}
}
}
_ => Ok(bad_request()),
}
}
}
fn get_header(request: &Request<Incoming>, header: &str) -> Option<String> {
request
.headers()
.get(header)?
.to_str()
.ok()
.map(|str| str.to_string())
}
enum GetFile {
ShowPage,
Download,
}
async fn get(
db_conn: Connection,
file_id: &str,
get_file: GetFile,
files_dir: &Path,
) -> Result<Response<BoxBody<Bytes, std::io::Error>>> {
let file = db::get_file(&db_conn, file_id.to_string()).await;
match (get_file, file) {
(GetFile::ShowPage, Ok(Some(file))) => {
Ok(with_headers(
response(StatusCode::OK, templates::file_page(file)),
vec![(CONTENT_TYPE, "text/html")],
))
}
(GetFile::Download, Ok(Some(file))) => {
let path = files_dir.join(file_id);
Ok(stream_file(path, file).await)
}
(_, Err(msg)) => {
log::error!("Getting file: {msg}");
Ok(internal_server_error())
}
(_, Ok(None)) => Ok(not_found()),
}
}
fn static_file(text: String, content_type: &str) -> Response<BoxBody<Bytes, std::io::Error>> {
let response = Response::builder()
.body(Full::new(text.into()).map_err(|e| match e {}).boxed())
.unwrap();
with_headers(response, vec![(CONTENT_TYPE, content_type)])
}
fn response(status_code: StatusCode, text: String) -> Response<BoxBody<Bytes, std::io::Error>> {
Response::builder()
.status(status_code)
.body(Full::new(text.into()).map_err(|e| match e {}).boxed())
.unwrap()
}
async fn stream_file(path: PathBuf, file: model::File) -> Response<BoxBody<Bytes, std::io::Error>> {
match File::open(path).await {
Err(e) => {
log::error!("Unable to open file: {e}");
not_found()
}
Ok(disk_file) => {
let reader_stream = ReaderStream::new(disk_file);
let stream_body = StreamBody::new(reader_stream.map_ok(Frame::data));
let boxed_body = stream_body.boxed();
let response = Response::builder().body(boxed_body).unwrap();
with_headers(
response,
vec![
(
CONTENT_DISPOSITION,
&format!("attachment; filename={}", file.name),
),
(CONTENT_LENGTH, &file.content_length.to_string()),
],
)
}
}
}
fn not_found() -> Response<BoxBody<Bytes, std::io::Error>> {
response(StatusCode::NOT_FOUND, templates::NOT_FOUND.to_string())
}
fn bad_request() -> Response<BoxBody<Bytes, std::io::Error>> {
response(StatusCode::BAD_REQUEST, templates::BAD_REQUEST.to_string())
}
fn internal_server_error() -> Response<BoxBody<Bytes, std::io::Error>> {
response(
StatusCode::INTERNAL_SERVER_ERROR,
templates::INTERNAL_SERVER_ERROR.to_string(),
)
}
pub fn with_headers(
response: Response<BoxBody<Bytes, std::io::Error>>,
headers: Vec<(HeaderName, &str)>,
) -> Response<BoxBody<Bytes, std::io::Error>> {
let mut response = response;
let response_headers = response.headers_mut();
for (name, value) in headers {
response_headers.insert(name, HeaderValue::from_str(value).unwrap());
}
response
}
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