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88 lines
3.3 KiB
Rust
88 lines
3.3 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use hyper::mime::{Mime, TopLevel, SubLevel, Attr, Value};
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use mime_classifier::MIMEClassifier;
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use net_traits::ProgressMsg::{Done, Payload};
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use net_traits::{LoadConsumer, LoadData, Metadata};
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use resource_task::{send_error, start_sending};
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use rustc_serialize::base64::FromBase64;
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use std::sync::Arc;
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use url::SchemeData;
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use url::percent_encoding::percent_decode;
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pub fn factory(load_data: LoadData, senders: LoadConsumer, _classifier: Arc<MIMEClassifier>) {
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// NB: we don't spawn a new task.
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// Hypothesis: data URLs are too small for parallel base64 etc. to be worth it.
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// Should be tested at some point.
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// Left in separate function to allow easy moving to a task, if desired.
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load(load_data, senders)
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}
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pub fn load(load_data: LoadData, start_chan: LoadConsumer) {
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let url = load_data.url;
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assert!(&*url.scheme == "data");
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// Split out content type and data.
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let mut scheme_data = match url.scheme_data {
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SchemeData::NonRelative(ref scheme_data) => scheme_data.clone(),
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_ => panic!("Expected a non-relative scheme URL.")
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};
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match url.query {
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Some(ref query) => {
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scheme_data.push_str("?");
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scheme_data.push_str(query);
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},
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None => ()
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}
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let parts: Vec<&str> = scheme_data.splitn(2, ',').collect();
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if parts.len() != 2 {
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send_error(url, "invalid data uri".to_owned(), start_chan);
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return;
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}
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// ";base64" must come at the end of the content type, per RFC 2397.
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// rust-http will fail to parse it because there's no =value part.
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let mut is_base64 = false;
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let mut ct_str = parts[0].to_owned();
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if ct_str.ends_with(";base64") {
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is_base64 = true;
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let end_index = ct_str.len() - 7;
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ct_str.truncate(end_index);
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}
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if ct_str.starts_with(";charset=") {
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ct_str = format!("text/plain{}", ct_str);
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}
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// Parse the content type using rust-http.
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// FIXME: this can go into an infinite loop! (rust-http #25)
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let mut content_type: Option<Mime> = ct_str.parse().ok();
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if content_type == None {
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content_type = Some(Mime(TopLevel::Text, SubLevel::Plain,
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vec!((Attr::Charset, Value::Ext("US-ASCII".to_owned())))));
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}
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let mut metadata = Metadata::default(url);
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metadata.set_content_type(content_type.as_ref());
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let progress_chan = start_sending(start_chan, metadata);
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let bytes = percent_decode(parts[1].as_bytes());
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if is_base64 {
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// FIXME(#2909): It’s unclear what to do with non-alphabet characters,
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// but Acid 3 apparently depends on spaces being ignored.
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let bytes = bytes.into_iter().filter(|&b| b != ' ' as u8).collect::<Vec<u8>>();
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match bytes.from_base64() {
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Err(..) => {
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progress_chan.send(Done(Err("non-base64 data uri".to_owned()))).unwrap();
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}
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Ok(data) => {
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progress_chan.send(Payload(data)).unwrap();
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progress_chan.send(Done(Ok(()))).unwrap();
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}
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}
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} else {
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progress_chan.send(Payload(bytes)).unwrap();
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progress_chan.send(Done(Ok(()))).unwrap();
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}
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}
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