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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 net_traits::{LoadData, Metadata};
use net_traits::ProgressMsg::{Payload, Done};
use resource_task::{TargetedLoadResponse, start_sending, ResponseSenders};
use rustc_serialize::base64::FromBase64;
use hyper::mime::Mime;
use url::{percent_decode, SchemeData};
use std::sync::mpsc::Sender;
pub fn factory(load_data: LoadData, start_chan: Sender<TargetedLoadResponse>) {
// 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, start_chan)
}
fn load(load_data: LoadData, start_chan: Sender<TargetedLoadResponse>) {
let url = load_data.url;
assert!(&*url.scheme == "data");
let mut metadata = Metadata::default(url.clone());
let senders = ResponseSenders {
immediate_consumer: start_chan,
eventual_consumer: load_data.consumer,
};
// 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(query) => {
scheme_data.push_str("?");
scheme_data.push_str(&query);
},
None => ()
}
let parts: Vec<&str> = scheme_data.splitn(1, ',').collect();
if parts.len() != 2 {
start_sending(senders, 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(senders, 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();
}
}
#[cfg(test)]
fn assert_parse(url: &'static str,
content_type: Option<(String, String)>,
charset: Option<String>,
data: Option<Vec<u8>>) {
use std::sync::mpsc::channel;
use url::Url;
use sniffer_task;
let (start_chan, start_port) = channel();
let sniffer_task = sniffer_task::new_sniffer_task();
load(LoadData::new(Url::parse(url).unwrap(), start_chan), sniffer_task);
let response = start_port.recv().unwrap();
assert_eq!(&response.metadata.content_type, &content_type);
assert_eq!(&response.metadata.charset, &charset);
let progress = response.progress_port.recv().unwrap();
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().unwrap(), 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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