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use actix_web::{
dev, error,
http::header::{ContentDisposition, LOCATION},
multipart, Error, FutureResponse, HttpMessage, HttpRequest, HttpResponse,
};
use std::io::Write;
use std::path::{Component, PathBuf};
use futures::future;
use futures::{Future, Stream};
pub fn save_file(
field: multipart::Field<dev::Payload>,
file_path: PathBuf,
) -> Box<Future<Item = i64, Error = Error>> {
let mut file = match std::fs::File::create(file_path) {
Ok(file) => file,
Err(e) => return Box::new(future::err(error::ErrorInternalServerError(e))),
};
Box::new(
field
.fold(0i64, move |acc, bytes| {
let rt = file
.write_all(bytes.as_ref())
.map(|_| acc + bytes.len() as i64)
.map_err(|e| error::MultipartError::Payload(error::PayloadError::Io(e)));
future::result(rt)
})
.map_err(|e| error::ErrorInternalServerError(e)),
)
}
pub fn handle_multipart(
item: multipart::MultipartItem<dev::Payload>,
mut file_path: PathBuf,
) -> Box<Stream<Item = i64, Error = Error>> {
match item {
multipart::MultipartItem::Field(field) => {
let err = || Box::new(future::err(error::ContentTypeError::ParseError.into()));
let filename = field
.headers()
.get("content-disposition")
.ok_or(err())
.and_then(|cd| ContentDisposition::from_raw(cd).map_err(|_| err()))
.and_then(|content_disposition| {
content_disposition
.get_filename()
.ok_or(err())
.map(|cd| String::from(cd))
});
match filename {
Ok(f) => {
file_path = file_path.join(f);
// TODO should I allow overriding existing files?
Box::new(save_file(field, file_path).into_stream())
}
Err(e) => Box::new(e.into_stream()),
}
}
multipart::MultipartItem::Nested(mp) => Box::new(
mp.map_err(error::ErrorInternalServerError)
.map(move |item| handle_multipart(item, file_path.clone()))
.flatten(),
),
}
}
pub fn upload_file(req: &HttpRequest<crate::MiniserveConfig>) -> FutureResponse<HttpResponse> {
if req.query().contains_key("path") {
let path_str = req.query()["path"].clone();
let mut path = PathBuf::from(path_str.clone());
// serever root path should be valid
let app_root_dir = req.state().path.clone().canonicalize().unwrap();
// allow file upload only under current dir
if path.has_root() {
path = match path.strip_prefix(Component::RootDir) {
Ok(dir) => dir.to_path_buf(),
Err(_) => {
return Box::new(future::ok(HttpResponse::BadRequest().body("Invalid path")))
}
}
}
let target_dir = match app_root_dir.clone().join(path).canonicalize() {
Ok(path) => {
if path.starts_with(&app_root_dir) {
path
} else {
return Box::new(future::ok(HttpResponse::BadRequest().body("Invalid path")));
}
}
Err(_) => return Box::new(future::ok(HttpResponse::BadRequest().body("Invalid path"))),
};
if let Ok(target_path) = target_dir.canonicalize() {
Box::new(
req.multipart()
.map_err(error::ErrorInternalServerError)
.map(move |item| handle_multipart(item, target_path.clone()))
.flatten()
.collect()
.map(|_| {
HttpResponse::TemporaryRedirect()
.header(LOCATION, path_str)
.finish()
})
.map_err(|e| e),
)
} else {
Box::new(future::ok(HttpResponse::BadRequest().body("invalid path")))
}
} else {
Box::new(future::ok(HttpResponse::BadRequest().body("")))
}
}
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