minidom: remove unused parser module
This commit is contained in:
Astro
parent
d4a5a8247b
commit
568a7c2611
1 changed files with 0 additions and 187 deletions
|
|
@ -1,187 +0,0 @@
|
|||
// Copyright (c) 2020 Maxime “pep” Buquet <pep@bouah.net>
|
||||
// Copyright (c) 2020 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
|
||||
//
|
||||
// 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/.
|
||||
|
||||
//! Provides a `Parser` type, which takes bytes and returns Elements. It also keeps a hold of
|
||||
//! ascendant elements to be able to handle namespaces properly.
|
||||
|
||||
use crate::element::Element;
|
||||
use crate::error::{Error, ParserError, Result};
|
||||
use crate::tree_builder::TreeBuilder;
|
||||
|
||||
use rxml::{PushDriver, RawParser};
|
||||
use std::str;
|
||||
|
||||
/// Parser
|
||||
#[derive(Debug)]
|
||||
pub struct Parser {
|
||||
driver: PushDriver<RawParser>,
|
||||
tree_builder: TreeBuilder,
|
||||
state: ParserState,
|
||||
}
|
||||
|
||||
/// Describes the state of the parser.
|
||||
///
|
||||
/// This parser will only accept one-level documents. The root element is kept for convenience, to
|
||||
/// be able to pass namespaces down to children who are themselves children.
|
||||
#[derive(Debug)]
|
||||
pub enum ParserState {
|
||||
/// Not enough data has been processed to find the first element.
|
||||
Empty,
|
||||
|
||||
/// The normal state. the root element has been identified and children are processed.
|
||||
Root {
|
||||
/// Root element. Kept for future reference
|
||||
root: Element,
|
||||
|
||||
/// Child element
|
||||
child: Option<Element>,
|
||||
|
||||
/// XXX: Weird flag to say if we've already sent what we could send or if there's more to
|
||||
/// send. This Variant needs to be changed.
|
||||
sent: bool,
|
||||
},
|
||||
|
||||
/// Something was passed in the buffer that made the parser get into an error state.
|
||||
Error,
|
||||
|
||||
/// The root element has been closed. No feed-ing can happen past this point.
|
||||
Closed,
|
||||
}
|
||||
|
||||
/// Result of polling the parser
|
||||
#[derive(Debug)]
|
||||
pub enum ParserResult {
|
||||
/// Buffer is not empty but needs more data
|
||||
Partial,
|
||||
|
||||
/// An Element has been generated from the buffer.
|
||||
Single(Element),
|
||||
}
|
||||
|
||||
/*
|
||||
/// Split <stream:stream> and parse it.
|
||||
fn split_stream_stream_stream_features(string: String) -> (Element, Element) {
|
||||
let mut stuff = string.splitn(2, '>');
|
||||
let stream_opening_str = stuff.next().unwrap().to_string() + "/>";
|
||||
let rest = stuff.next().unwrap().to_string();
|
||||
let stream_opening: Element = stream_opening_str.parse().unwrap();
|
||||
let rest: Element = rest.parse().unwrap();
|
||||
println!("opening: {}", String::from(&stream_opening));
|
||||
println!("features: {}", String::from(&rest));
|
||||
(stream_opening, rest)
|
||||
}
|
||||
*/
|
||||
|
||||
fn maybe_split_prolog(string: &str) -> &str {
|
||||
if string.starts_with("<?xml") {
|
||||
let mut stuff = string.splitn(2, '>');
|
||||
stuff.next();
|
||||
stuff.next().unwrap()
|
||||
} else {
|
||||
string
|
||||
}
|
||||
}
|
||||
|
||||
impl Parser {
|
||||
/// Creates a new Parser
|
||||
pub fn new() -> Parser {
|
||||
Parser {
|
||||
driver: PushDriver::default(),
|
||||
tree_builder: TreeBuilder::new(),
|
||||
state: ParserState::Empty,
|
||||
}
|
||||
}
|
||||
|
||||
/// Feed bytes to the parser.
|
||||
pub fn feed(&mut self, bytes: BytesMut) -> Result<()> {
|
||||
self.driver.feed(bytes);
|
||||
bytes.clear();
|
||||
|
||||
let state = match self.state {
|
||||
ParserState::Empty => {
|
||||
// TODO: Try splitting xml prolog and stream header
|
||||
let foo = self.buffer.borrow();
|
||||
let header = maybe_split_prolog(str::from_utf8(foo.as_ref())?);
|
||||
println!("FOO: header: {:?}", header);
|
||||
let mut reader = EventReader::from_str(header);
|
||||
let root = Element::from_reader(&mut reader);
|
||||
match root {
|
||||
Ok(root) => {
|
||||
println!("FOO: elem: {:?}", root);
|
||||
ParserState::Root {
|
||||
root,
|
||||
child: None,
|
||||
sent: false,
|
||||
}
|
||||
}
|
||||
Err(e) => {
|
||||
println!("FOO: err: {:?}", e);
|
||||
ParserState::Empty
|
||||
}
|
||||
}
|
||||
}
|
||||
ParserState::Closed => return Err(Error::ParserError(ParserError::Closed)),
|
||||
_ => ParserState::Empty,
|
||||
};
|
||||
|
||||
self.state = state;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// Returns Elements to the application.
|
||||
pub fn poll(&mut self) -> Result<Option<ParserResult>> {
|
||||
match &self.state {
|
||||
ParserState::Empty if self.buffer.borrow().len() != 0 => {
|
||||
Ok(Some(ParserResult::Partial))
|
||||
}
|
||||
ParserState::Empty | ParserState::Closed | ParserState::Error => Ok(None),
|
||||
ParserState::Root {
|
||||
root, child: None, ..
|
||||
} => Ok(Some(ParserResult::Single(root.clone()))),
|
||||
ParserState::Root {
|
||||
child: Some(child), ..
|
||||
} => Ok(Some(ParserResult::Single(child.clone()))),
|
||||
}
|
||||
}
|
||||
|
||||
/// Resets the parser
|
||||
pub fn reset(&mut self) {
|
||||
*self = Parser::new();
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use bytes::{BufMut, BytesMut};
|
||||
|
||||
#[test]
|
||||
fn test_prolog() {
|
||||
let mut parser = Parser::new();
|
||||
let mut buf = BytesMut::new();
|
||||
buf.put(&b"<?xml version='1.0'?>"[..]);
|
||||
buf.put(&b"<stream:stream xmlns='jabber:client' xml:lang='en' xmlns:stream='http://etherx.jabber.org/streams' version='1.0' to='foo.bar'>"[..]);
|
||||
match parser.feed(buf) {
|
||||
Ok(_) => (),
|
||||
_ => panic!(),
|
||||
}
|
||||
|
||||
let elem = Element::builder("stream:stream", "http://etherx.jabber.org/streams")
|
||||
.prefix_ns(None, "jabber:client")
|
||||
.attr("xml:lang", "en")
|
||||
.attr("version", "1.0")
|
||||
.attr("to", "foo.bar")
|
||||
.build();
|
||||
|
||||
println!("BAR: elem: {:?}", elem);
|
||||
|
||||
match parser.poll() {
|
||||
Ok(Some(ParserResult::Single(e))) => assert_eq!(e, elem),
|
||||
_ => panic!(),
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue