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54 lines
1.5 KiB
Rust
54 lines
1.5 KiB
Rust
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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use crate::CancelHandle;
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use crate::CancelableResponseFuture;
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use crate::FetchHandler;
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use crate::FetchRequestBodyResource;
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use deno_core::error::type_error;
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use deno_core::futures::FutureExt;
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use deno_core::futures::TryFutureExt;
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use deno_core::url::Url;
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use deno_core::CancelFuture;
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use deno_core::OpState;
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use reqwest::StatusCode;
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use std::rc::Rc;
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use tokio_util::io::ReaderStream;
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/// An implementation which tries to read file URLs from the file system via
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/// tokio::fs.
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#[derive(Clone)]
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pub struct FsFetchHandler;
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impl FetchHandler for FsFetchHandler {
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fn fetch_file(
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&self,
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_state: &mut OpState,
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url: Url,
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) -> (
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CancelableResponseFuture,
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Option<FetchRequestBodyResource>,
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Option<Rc<CancelHandle>>,
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) {
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let cancel_handle = CancelHandle::new_rc();
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let response_fut = async move {
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let path = url.to_file_path()?;
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let file = tokio::fs::File::open(path).map_err(|_| ()).await?;
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let stream = ReaderStream::new(file);
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let body = reqwest::Body::wrap_stream(stream);
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let response = http::Response::builder()
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.status(StatusCode::OK)
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.body(body)
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.map_err(|_| ())?
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.into();
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Ok::<_, ()>(response)
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}
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.map_err(move |_| {
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type_error("NetworkError when attempting to fetch resource.")
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})
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.or_cancel(&cancel_handle)
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.boxed_local();
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(response_fut, None, Some(cancel_handle))
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}
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}
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