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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 std::str;
use resource_task::{Done, Payload, Metadata, LoadData, LoadResponse, LoaderTask, start_sending};
use serialize::base64::FromBase64;
use http::headers::test_utils::from_stream_with_str;
use http::headers::content_type::MediaType;
use url::{percent_decode, NonRelativeSchemeData};
pub fn factory() -> LoaderTask {
proc(url, start_chan) {
// 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.
load(url, start_chan)
}
}
fn load(load_data: LoadData, start_chan: Sender<LoadResponse>) {
let url = load_data.url;
assert!("data" == url.scheme.as_slice());
let mut metadata = Metadata::default(url.clone());
// Split out content type and data.
let mut scheme_data = match url.scheme_data {
NonRelativeSchemeData(scheme_data) => scheme_data,
_ => fail!("Expected a non-relative scheme URL.")
};
match url.query {
Some(query) => {
scheme_data.push_str("?");
scheme_data.push_str(query.as_slice());
},
None => ()
}
let parts: Vec<&str> = scheme_data.as_slice().splitn(',', 1).collect();
if parts.len() != 2 {
start_sending(start_chan, metadata).send(Done(Err("invalid data uri".to_string())));
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.slice_to(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<MediaType> = from_stream_with_str(ct_str);
metadata.set_content_type(&content_type);
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.move_iter().filter(|&b| b != ' ' as u8).collect::<Vec<u8>>();
// FIXME(#2877): use bytes.as_slice().from_base64() when we upgrade to a Rust version
// that includes https://github.com/rust-lang/rust/pull/15810
let fake_utf8 = unsafe { str::raw::from_utf8(bytes.as_slice()) };
match fake_utf8.from_base64() {
Err(..) => {
progress_chan.send(Done(Err("non-base64 data uri".to_string())));
}
Ok(data) => {
progress_chan.send(Payload(data));
progress_chan.send(Done(Ok(())));
}
}
} else {
progress_chan.send(Payload(bytes));
progress_chan.send(Done(Ok(())));
}
}
#[cfg(test)]
fn assert_parse(url: &'static str,
content_type: Option<(String, String)>,
charset: Option<String>,
data: Option<Vec<u8>>) {
use std::comm;
use url::Url;
let (start_chan, start_port) = comm::channel();
load(LoadData::new(Url::parse(url).unwrap()), start_chan);
let response = start_port.recv();
assert_eq!(&response.metadata.content_type, &content_type);
assert_eq!(&response.metadata.charset, &charset);
let progress = response.progress_port.recv();
match data {
None => {
assert_eq!(progress, Done(Err("invalid data uri".to_string())));
}
Some(dat) => {
assert_eq!(progress, Payload(dat));
assert_eq!(response.progress_port.recv(), Done(Ok(())));
}
}
}
#[test]
fn empty_invalid() {
assert_parse("data:", None, None, None);
}
#[test]
fn plain() {
assert_parse("data:,hello%20world", None, None, Some(b"hello world".iter().map(|&x| x).collect()));
}
#[test]
fn plain_ct() {
assert_parse("data:text/plain,hello",
Some(("text".to_string(), "plain".to_string())), None, Some(b"hello".iter().map(|&x| x).collect()));
}
#[test]
fn plain_charset() {
assert_parse("data:text/plain;charset=latin1,hello",
Some(("text".to_string(), "plain".to_string())), Some("latin1".to_string()), Some(b"hello".iter().map(|&x| x).collect()));
}
#[test]
fn base64() {
assert_parse("data:;base64,C62+7w==", None, None, Some(vec!(0x0B, 0xAD, 0xBE, 0xEF)));
}
#[test]
fn base64_ct() {
assert_parse("data:application/octet-stream;base64,C62+7w==",
Some(("application".to_string(), "octet-stream".to_string())), None, Some(vec!(0x0B, 0xAD, 0xBE, 0xEF)));
}
#[test]
fn base64_charset() {
assert_parse("data:text/plain;charset=koi8-r;base64,8PLl9+XkIO3l5Pfl5A==",
Some(("text".to_string(), "plain".to_string())), Some("koi8-r".to_string()),
Some(vec!(0xF0, 0xF2, 0xE5, 0xF7, 0xE5, 0xE4, 0x20, 0xED, 0xE5, 0xE4, 0xF7, 0xE5, 0xE4)));
}
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