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|
use crate::errors::FileUploadErrorKind;
use crate::renderer::file_upload_error;
use actix_web::{
dev, http::header, multipart, FromRequest, FutureResponse, HttpMessage, HttpRequest,
HttpResponse, Query,
};
use futures::{future, Future, Stream};
use serde::Deserialize;
use std::{
fs,
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 = FileUploadErrorKind>> {
if !override_files && file_path.exists() {
return Box::new(future::err(FileUploadErrorKind::FileExist));
}
let mut file = match std::fs::File::create(file_path) {
Ok(file) => file,
Err(e) => {
return Box::new(future::err(FileUploadErrorKind::IOError(e)));
}
};
Box::new(
field
.map_err(|e| FileUploadErrorKind::MultipartError(e))
.fold(0i64, move |acc, bytes| {
let rt = file
.write_all(bytes.as_ref())
.map(|_| acc + bytes.len() as i64)
.map_err(|e| FileUploadErrorKind::IOError(e));
future::result(rt)
}),
)
}
/// 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 = FileUploadErrorKind>> {
match item {
multipart::MultipartItem::Field(field) => {
let filename = field
.headers()
.get(header::CONTENT_DISPOSITION)
.ok_or(FileUploadErrorKind::ParseError)
.and_then(|cd| {
header::ContentDisposition::from_raw(cd)
.map_err(|_| FileUploadErrorKind::ParseError)
})
.and_then(|content_disposition| {
content_disposition
.get_filename()
.ok_or(FileUploadErrorKind::ParseError)
.map(|cd| String::from(cd))
});
let err = |e: FileUploadErrorKind| Box::new(future::err(e).into_stream());
match filename {
Ok(f) => {
match fs::metadata(&file_path) {
Ok(metadata) => {
if !metadata.is_dir() || metadata.permissions().readonly() {
return err(FileUploadErrorKind::InsufficientPermissions);
}
}
Err(_) => {
return err(FileUploadErrorKind::InsufficientPermissions);
}
}
file_path = file_path.join(f);
Box::new(save_file(field, file_path, override_files).into_stream())
}
Err(e) => err(e),
}
}
multipart::MultipartItem::Nested(mp) => Box::new(
mp.map_err(|e| FileUploadErrorKind::MultipartError(e))
.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"),
))
}
};
// this is really ugly I will try to think about something smarter
let return_path: String = req.headers()[header::REFERER].clone().to_str().unwrap_or("/").to_owned();
let r_p2 = return_path.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(|e| FileUploadErrorKind::MultipartError(e))
.map(move |item| handle_multipart(item, target_dir.clone(), override_files))
.flatten()
.collect()
.map(move |_| {
HttpResponse::TemporaryRedirect()
.header(
header::LOCATION,
format!("{}", return_path.clone()),
)
.finish()
})
.or_else(move |e| {
let error_description = format!("{}",e);
future::ok(HttpResponse::BadRequest().body(file_upload_error(&error_description, &r_p2.clone()).into_string()))
)
}
|
