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/* 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 mime_classifier::MIMEClassifier;
use net_traits::ProgressMsg::{Payload, Done};
use net_traits::{LoadData, Metadata, LoadConsumer};
use resource_task::start_sending;
use rustc_serialize::base64::FromBase64;
use hyper::mime::Mime;
use std::sync::Arc;
use url::SchemeData;
use url::percent_encoding::percent_decode;
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();
}
}
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