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use std::{
fmt, io,
path::PathBuf,
rc::Rc,
task::{Context, Poll},
};
use actix_service::Service;
use actix_web::{
dev::{ServiceRequest, ServiceResponse},
error::Error,
guard::Guard,
http::{header, Method},
HttpResponse,
};
use futures_util::future::{ok, Either, LocalBoxFuture, Ready};
use crate::{
named, Directory, DirectoryRenderer, FilesError, HttpService, MimeOverride,
NamedFile, PathBufWrap,
};
pub struct FilesService {
pub(crate) directory: PathBuf,
pub(crate) index: Option<String>,
pub(crate) show_index: bool,
pub(crate) redirect_to_slash: bool,
pub(crate) default: Option<HttpService>,
pub(crate) renderer: Rc<DirectoryRenderer>,
pub(crate) mime_override: Option<Rc<MimeOverride>>,
pub(crate) file_flags: named::Flags,
pub(crate) guards: Option<Rc<dyn Guard>>,
pub(crate) hidden_files: bool,
}
type FilesServiceFuture = Either<
Ready<Result<ServiceResponse, Error>>,
LocalBoxFuture<'static, Result<ServiceResponse, Error>>,
>;
impl FilesService {
fn handle_err(&mut self, e: io::Error, req: ServiceRequest) -> FilesServiceFuture {
log::debug!("Failed to handle {}: {}", req.path(), e);
if let Some(ref mut default) = self.default {
Either::Right(default.call(req))
} else {
Either::Left(ok(req.error_response(e)))
}
}
}
impl fmt::Debug for FilesService {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("FilesService")
}
}
impl Service for FilesService {
type Request = ServiceRequest;
type Response = ServiceResponse;
type Error = Error;
type Future = FilesServiceFuture;
fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, req: ServiceRequest) -> Self::Future {
let is_method_valid = if let Some(guard) = &self.guards {
(**guard).check(req.head())
} else {
matches!(*req.method(), Method::HEAD | Method::GET)
};
if !is_method_valid {
return Either::Left(ok(req.into_response(
actix_web::HttpResponse::MethodNotAllowed()
.header(header::CONTENT_TYPE, "text/plain")
.body("Request did not meet this resource's requirements."),
)));
}
let real_path =
match PathBufWrap::parse_path(req.match_info().path(), self.hidden_files) {
Ok(item) => item,
Err(e) => return Either::Left(ok(req.error_response(e))),
};
let path = match self.directory.join(&real_path).canonicalize() {
Ok(path) => path,
Err(e) => return self.handle_err(e, req),
};
if path.is_dir() {
if let Some(ref redir_index) = self.index {
if self.redirect_to_slash && !req.path().ends_with('/') {
let redirect_to = format!("{}/", req.path());
return Either::Left(ok(req.into_response(
HttpResponse::Found()
.header(header::LOCATION, redirect_to)
.body("")
.into_body(),
)));
}
let path = path.join(redir_index);
match NamedFile::open(path) {
Ok(mut named_file) => {
if let Some(ref mime_override) = self.mime_override {
let new_disposition =
mime_override(&named_file.content_type.type_());
named_file.content_disposition.disposition = new_disposition;
}
named_file.flags = self.file_flags;
let (req, _) = req.into_parts();
Either::Left(ok(match named_file.into_response(&req) {
Ok(item) => ServiceResponse::new(req, item),
Err(e) => ServiceResponse::from_err(e, req),
}))
}
Err(e) => self.handle_err(e, req),
}
} else if self.show_index {
let dir = Directory::new(self.directory.clone(), path);
let (req, _) = req.into_parts();
let x = (self.renderer)(&dir, &req);
match x {
Ok(resp) => Either::Left(ok(resp)),
Err(e) => Either::Left(ok(ServiceResponse::from_err(e, req))),
}
} else {
Either::Left(ok(ServiceResponse::from_err(
FilesError::IsDirectory,
req.into_parts().0,
)))
}
} else {
match NamedFile::open(path) {
Ok(mut named_file) => {
if let Some(ref mime_override) = self.mime_override {
let new_disposition =
mime_override(&named_file.content_type.type_());
named_file.content_disposition.disposition = new_disposition;
}
named_file.flags = self.file_flags;
let (req, _) = req.into_parts();
match named_file.into_response(&req) {
Ok(item) => {
Either::Left(ok(ServiceResponse::new(req.clone(), item)))
}
Err(e) => Either::Left(ok(ServiceResponse::from_err(e, req))),
}
}
Err(e) => self.handle_err(e, req),
}
}
}
}