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|
use actix_web::{
dev, error,
http::header::{ContentDisposition, LOCATION, REFERER},
multipart, Error, FromRequest, FutureResponse, HttpMessage, HttpRequest, HttpResponse, Query,
};
use futures::{future, Future, Stream};
use serde::Deserialize;
use std::{
io::Write,
path::{Component, PathBuf},
};
/// Query parameters
#[derive(Debug, Deserialize)]
struct QueryParameters {
path: PathBuf,
}
/// Create future to save file.
fn save_file(
field: multipart::Field<dev::Payload>,
file_path: PathBuf,
override_files: bool,
) -> Box<Future<Item = i64, Error = Error>> {
if !override_files && file_path.exists() {
return Box::new(future::err(error::ErrorInternalServerError("file exists")));
}
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)),
)
}
/// Create new future to handle file as multipart data.
fn handle_multipart(
item: multipart::MultipartItem<dev::Payload>,
mut file_path: PathBuf,
override_files: bool,
) -> 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);
Box::new(save_file(field, file_path, override_files).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(), override_files))
.flatten(),
),
}
}
/// Handle incoming request to upload file.
/// Target file path is expected as path parameter in URI and is interpreted as relative from
/// server root directory. Any path which will go outside of this directory is considered
/// invalid.
/// This method returns future.
pub fn upload_file(req: &HttpRequest<crate::MiniserveConfig>) -> FutureResponse<HttpResponse> {
let app_root_dir = req.state().path.clone().canonicalize().unwrap();
let path = match Query::<QueryParameters>::extract(req) {
Ok(query) => {
if let Ok(stripped_path) = query.path.strip_prefix(Component::RootDir) {
stripped_path.to_owned()
} else {
query.path.clone()
}
}
Err(_) => {
return Box::new(future::ok(
HttpResponse::BadRequest().body("Unspecified parameter path"),
))
}
};
let return_path = req.headers()[REFERER].clone();
// if target path is under app root directory save file
let target_dir = match &app_root_dir.clone().join(path.clone()).canonicalize() {
Ok(path) if path.starts_with(&app_root_dir) => path.clone(),
_ => return Box::new(future::ok(HttpResponse::BadRequest().body("Invalid path"))),
};
let override_files = req.state().override_files;
Box::new(
req.multipart()
.map_err(error::ErrorInternalServerError)
.map(move |item| handle_multipart(item, target_dir.clone(), override_files))
.flatten()
.collect()
//.map(|s| HttpResponse::Ok().json(s))
.map(move |_| {
HttpResponse::TemporaryRedirect()
.header(LOCATION, format!("{}", return_path.to_str().unwrap_or("/")))
.finish()
})
.map_err(|e| e),
)
}
|
