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xmpp_codec: fix large stanzas

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This commit is contained in:
Astro 2017-07-18 22:12:00 +02:00
parent c6351e8efa
commit 68af9d2110
1 changed files with 30 additions and 0 deletions
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30
src/xmpp_codec.rs
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@ -247,6 +247,12 @@ impl Encoder for XMPPCodec {
type Error = Error;
fn encode(&mut self, item: Self::Item, dst: &mut BytesMut) -> Result<(), Self::Error> {
let remaining = dst.capacity() - dst.len();
let max_stanza_size: usize = 2usize.pow(16);
if remaining < max_stanza_size {
dst.reserve(max_stanza_size - remaining);
}
match item {
Packet::StreamStart(start_attrs) => {
let mut buf = String::new();
@ -421,4 +427,28 @@ mod tests {
_ => false,
});
}
/// By default, encode() only get's a BytesMut that has 8kb space reserved.
#[test]
fn test_large_stanza() {
use std::io::Cursor;
use futures::{Future, Sink};
use tokio_io::codec::FramedWrite;
let framed = FramedWrite::new(Cursor::new(vec![]), XMPPCodec::new());
let mut text = "".to_owned();
for _ in 0..2usize.pow(15) {
text = text + "A";
}
let stanza = Element::builder("message")
.append(
Element::builder("body")
.append(&text)
.build()
)
.build();
let framed = framed.send(Packet::Stanza(stanza))
.wait()
.expect("send");
assert_eq!(framed.get_ref().get_ref(), &("<message><body>".to_owned() + &text + "</body></message>").as_bytes());
}
}