mirror of
https://github.com/servo/servo.git
synced 2025-06-13 02:44:29 +00:00
84 lines
3 KiB
Rust
84 lines
3 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
|
||
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
||
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
||
|
||
use net_traits::{LoadData, Metadata, LoadConsumer};
|
||
use net_traits::ProgressMsg::{Payload, Done};
|
||
use mime_classifier::MIMEClassifier;
|
||
use resource_task::start_sending;
|
||
|
||
use rustc_serialize::base64::FromBase64;
|
||
|
||
use hyper::mime::Mime;
|
||
use std::sync::Arc;
|
||
use url::percent_encoding::percent_decode;
|
||
use url::SchemeData;
|
||
|
||
pub fn factory(load_data: LoadData, senders: LoadConsumer, _classifier: Arc<MIMEClassifier>) {
|
||
// NB: we don't spawn a new task.
|
||
// Hypothesis: data URLs are too small for parallel base64 etc. to be worth it.
|
||
// Should be tested at some point.
|
||
// Left in separate function to allow easy moving to a task, if desired.
|
||
load(load_data, senders)
|
||
}
|
||
|
||
pub fn load(load_data: LoadData, start_chan: LoadConsumer) {
|
||
let url = load_data.url;
|
||
assert!(&*url.scheme == "data");
|
||
|
||
let mut metadata = Metadata::default(url.clone());
|
||
|
||
// Split out content type and data.
|
||
let mut scheme_data = match url.scheme_data {
|
||
SchemeData::NonRelative(scheme_data) => scheme_data,
|
||
_ => panic!("Expected a non-relative scheme URL.")
|
||
};
|
||
match url.query {
|
||
Some(ref query) => {
|
||
scheme_data.push_str("?");
|
||
scheme_data.push_str(query);
|
||
},
|
||
None => ()
|
||
}
|
||
let parts: Vec<&str> = scheme_data.splitn(2, ',').collect();
|
||
if parts.len() != 2 {
|
||
start_sending(start_chan,
|
||
metadata).send(Done(Err("invalid data uri".to_string()))).unwrap();
|
||
return;
|
||
}
|
||
|
||
// ";base64" must come at the end of the content type, per RFC 2397.
|
||
// rust-http will fail to parse it because there's no =value part.
|
||
let mut is_base64 = false;
|
||
let mut ct_str = parts[0];
|
||
if ct_str.ends_with(";base64") {
|
||
is_base64 = true;
|
||
ct_str = &ct_str[..ct_str.as_bytes().len() - 7];
|
||
}
|
||
|
||
// Parse the content type using rust-http.
|
||
// FIXME: this can go into an infinite loop! (rust-http #25)
|
||
let content_type: Option<Mime> = ct_str.parse().ok();
|
||
metadata.set_content_type(content_type.as_ref());
|
||
|
||
let progress_chan = start_sending(start_chan, metadata);
|
||
let bytes = percent_decode(parts[1].as_bytes());
|
||
|
||
if is_base64 {
|
||
// FIXME(#2909): It’s unclear what to do with non-alphabet characters,
|
||
// but Acid 3 apparently depends on spaces being ignored.
|
||
let bytes = bytes.into_iter().filter(|&b| b != ' ' as u8).collect::<Vec<u8>>();
|
||
match bytes.from_base64() {
|
||
Err(..) => {
|
||
progress_chan.send(Done(Err("non-base64 data uri".to_string()))).unwrap();
|
||
}
|
||
Ok(data) => {
|
||
progress_chan.send(Payload(data)).unwrap();
|
||
progress_chan.send(Done(Ok(()))).unwrap();
|
||
}
|
||
}
|
||
} else {
|
||
progress_chan.send(Payload(bytes)).unwrap();
|
||
progress_chan.send(Done(Ok(()))).unwrap();
|
||
}
|
||
}
|