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ibb: Improve handling of optional stanza attribute.

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This commit is contained in:
Emmanuel Gil Peyrot 2017-04-22 19:15:29 +01:00
parent fbb609485b
commit 22ec4b1913
1 changed files with 13 additions and 16 deletions
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29
src/ibb.rs
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@ -28,7 +28,7 @@ impl FromStr for Stanza {
} else if s == "message" {
Ok(Stanza::Message)
} else {
Err(Error::ParseError("Unknown 'stanza' attribute."))
Err(Error::ParseError("Invalid 'stanza' attribute."))
}
}
}
@ -50,37 +50,35 @@ pub enum IBB {
},
}
fn optional_attr<T: FromStr>(root: &Element, attr: &str) -> Option<T> {
fn required_attr<T: FromStr>(root: &Element, attr: &str, err: Error) -> Result<T, Error> {
root.attr(attr)
.and_then(|value| value.parse().ok())
}
fn required_attr<T: FromStr>(root: &Element, attr: &str, err: Error) -> Result<T, Error> {
optional_attr(root, attr).ok_or(err)
.ok_or(err)
}
pub fn parse_ibb(root: &Element) -> Result<IBB, Error> {
if root.is("open", ns::IBB) {
let block_size = required_attr(root, "block-size", Error::ParseError("Required attribute 'block-size' missing in open element."))?;
let sid = required_attr(root, "sid", Error::ParseError("Required attribute 'sid' missing in open element."))?;
let stanza = root.attr("stanza")
.and_then(|value| value.parse().ok())
.unwrap_or_default();
for _ in root.children() {
return Err(Error::ParseError("Unknown child in open element."));
}
let block_size = required_attr(root, "block-size", Error::ParseError("Required attribute 'block-size' missing in open element."))?;
let sid = required_attr(root, "sid", Error::ParseError("Required attribute 'sid' missing in open element."))?;
let stanza = match root.attr("stanza") {
Some(stanza) => stanza.parse()?,
None => Default::default(),
};
Ok(IBB::Open {
block_size: block_size,
sid: sid,
stanza: stanza
})
} else if root.is("data", ns::IBB) {
let seq = required_attr(root, "seq", Error::ParseError("Required attribute 'seq' missing in data element."))?;
let sid = required_attr(root, "sid", Error::ParseError("Required attribute 'sid' missing in data element."))?;
let data = base64::decode(&root.text())?;
for _ in root.children() {
return Err(Error::ParseError("Unknown child in data element."));
}
let seq = required_attr(root, "seq", Error::ParseError("Required attribute 'seq' missing in data element."))?;
let sid = required_attr(root, "sid", Error::ParseError("Required attribute 'sid' missing in data element."))?;
let data = base64::decode(&root.text())?;
Ok(IBB::Data {
seq: seq,
sid: sid,
@ -168,7 +166,6 @@ mod tests {
}
#[test]
#[ignore]
fn test_invalid_stanza() {
let elem: Element = "<open xmlns='http://jabber.org/protocol/ibb' block-size='128' sid='coucou' stanza='fdsq'/>".parse().unwrap();
let error = ibb::parse_ibb(&elem).unwrap_err();
@ -176,6 +173,6 @@ mod tests {
Error::ParseError(string) => string,
_ => panic!(),
};
assert_eq!(message, "Wrong value for 'stanza' attribute in open.");
assert_eq!(message, "Invalid 'stanza' attribute.");
}
}