286 lines
10 KiB
Rust
286 lines
10 KiB
Rust
// Copyright (c) 2017 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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use try_from::TryFrom;
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use hashes::Hash;
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use minidom::{Element, IntoElements, ElementEmitter};
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use chrono::{DateTime, FixedOffset};
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use error::Error;
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use ns;
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#[derive(Debug, Clone, PartialEq)]
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pub struct Range {
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pub offset: u64,
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pub length: Option<u64>,
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pub hashes: Vec<Hash>,
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}
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impl IntoElements for Range {
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fn into_elements(self, emitter: &mut ElementEmitter) {
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let mut elem = Element::builder("range")
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.ns(ns::JINGLE_FT)
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.attr("offset", self.offset)
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.attr("length", self.length)
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.build();
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for hash in self.hashes {
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elem.append_child(hash.into());
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}
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emitter.append_child(elem);
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}
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}
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#[derive(Debug, Clone)]
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pub struct File {
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pub date: Option<DateTime<FixedOffset>>,
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pub media_type: Option<String>,
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pub name: Option<String>,
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pub desc: Option<String>,
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pub size: Option<u64>,
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pub range: Option<Range>,
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pub hashes: Vec<Hash>,
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}
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#[derive(Debug, Clone)]
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pub struct Description {
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pub file: File,
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}
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#[derive(Debug, Clone)]
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pub enum Creator {
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Initiator,
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Responder,
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}
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#[derive(Debug, Clone)]
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pub struct Checksum {
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pub name: String,
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pub creator: Creator,
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pub file: File,
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}
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#[derive(Debug, Clone)]
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pub struct Received {
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pub name: String,
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pub creator: Creator,
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}
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impl IntoElements for Received {
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fn into_elements(self, emitter: &mut ElementEmitter) {
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let elem = Element::builder("received")
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.ns(ns::JINGLE_FT)
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.attr("name", self.name)
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.attr("creator", match self.creator {
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Creator::Initiator => "initiator",
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Creator::Responder => "responder",
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})
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.build();
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emitter.append_child(elem);
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}
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}
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impl TryFrom<Element> for Description {
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type Err = Error;
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fn try_from(elem: Element) -> Result<Description, Error> {
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if !elem.is("description", ns::JINGLE_FT) {
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return Err(Error::ParseError("This is not a JingleFT description element."));
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}
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if elem.children().count() != 1 {
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return Err(Error::ParseError("JingleFT description element must have exactly one child."));
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}
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let mut date = None;
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let mut media_type = None;
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let mut name = None;
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let mut desc = None;
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let mut size = None;
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let mut range = None;
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let mut hashes = vec!();
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for description_payload in elem.children() {
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if !description_payload.is("file", ns::JINGLE_FT) {
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return Err(Error::ParseError("Unknown element in JingleFT description."));
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}
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for file_payload in description_payload.children() {
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if file_payload.is("date", ns::JINGLE_FT) {
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if date.is_some() {
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return Err(Error::ParseError("File must not have more than one date."));
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}
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date = Some(file_payload.text().parse()?);
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} else if file_payload.is("media-type", ns::JINGLE_FT) {
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if media_type.is_some() {
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return Err(Error::ParseError("File must not have more than one media-type."));
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}
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media_type = Some(file_payload.text());
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} else if file_payload.is("name", ns::JINGLE_FT) {
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if name.is_some() {
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return Err(Error::ParseError("File must not have more than one name."));
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}
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name = Some(file_payload.text());
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} else if file_payload.is("desc", ns::JINGLE_FT) {
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if desc.is_some() {
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return Err(Error::ParseError("File must not have more than one desc."));
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}
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desc = Some(file_payload.text());
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} else if file_payload.is("size", ns::JINGLE_FT) {
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if size.is_some() {
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return Err(Error::ParseError("File must not have more than one size."));
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}
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size = Some(file_payload.text().parse()?);
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} else if file_payload.is("range", ns::JINGLE_FT) {
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if range.is_some() {
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return Err(Error::ParseError("File must not have more than one range."));
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}
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let offset = get_attr!(file_payload, "offset", default);
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let length = get_attr!(file_payload, "length", optional);
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let mut range_hashes = vec!();
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for hash_element in file_payload.children() {
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if !hash_element.is("hash", ns::HASHES) {
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return Err(Error::ParseError("Unknown element in JingleFT range."));
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}
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range_hashes.push(Hash::try_from(hash_element.clone())?);
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}
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range = Some(Range {
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offset: offset,
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length: length,
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hashes: range_hashes,
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});
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} else if file_payload.is("hash", ns::HASHES) {
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hashes.push(Hash::try_from(file_payload.clone())?);
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} else {
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return Err(Error::ParseError("Unknown element in JingleFT file."));
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}
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}
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}
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Ok(Description {
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file: File {
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date: date,
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media_type: media_type,
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name: name,
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desc: desc,
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size: size,
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range: range,
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hashes: hashes,
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},
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})
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}
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}
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impl From<File> for Element {
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fn from(file: File) -> Element {
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let mut root = Element::builder("file")
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.ns(ns::JINGLE_FT)
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.build();
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if let Some(date) = file.date {
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root.append_child(Element::builder("date")
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.ns(ns::JINGLE_FT)
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.append(date.to_rfc3339())
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.build());
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}
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if let Some(media_type) = file.media_type {
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root.append_child(Element::builder("media-type")
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.ns(ns::JINGLE_FT)
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.append(media_type)
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.build());
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}
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if let Some(name) = file.name {
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root.append_child(Element::builder("name")
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.ns(ns::JINGLE_FT)
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.append(name)
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.build());
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}
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if let Some(desc) = file.desc {
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root.append_child(Element::builder("desc")
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.ns(ns::JINGLE_FT)
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.append(desc)
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.build());
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}
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if let Some(size) = file.size {
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root.append_child(Element::builder("size")
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.ns(ns::JINGLE_FT)
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.append(format!("{}", size))
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.build());
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}
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if let Some(range) = file.range {
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root.append_child(Element::builder("range")
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.ns(ns::JINGLE_FT)
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.append(range)
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.build());
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}
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for hash in file.hashes {
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root.append_child(hash.into());
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}
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root
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}
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}
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impl From<Description> for Element {
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fn from(description: Description) -> Element {
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let file: Element = description.file.into();
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Element::builder("description")
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.ns(ns::JINGLE_FT)
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.append(file)
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.build()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use hashes::Algo;
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use base64;
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#[test]
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fn test_description() {
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let elem: Element = r#"
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<description xmlns='urn:xmpp:jingle:apps:file-transfer:5'>
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<file>
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<media-type>text/plain</media-type>
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<name>test.txt</name>
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<date>2015-07-26T21:46:00+01:00</date>
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<size>6144</size>
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<hash xmlns='urn:xmpp:hashes:2'
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algo='sha-1'>w0mcJylzCn+AfvuGdqkty2+KP48=</hash>
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</file>
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</description>
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"#.parse().unwrap();
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let desc = Description::try_from(elem).unwrap();
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assert_eq!(desc.file.media_type, Some(String::from("text/plain")));
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assert_eq!(desc.file.name, Some(String::from("test.txt")));
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assert_eq!(desc.file.desc, None);
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assert_eq!(desc.file.date, Some(DateTime::parse_from_rfc3339("2015-07-26T21:46:00+01:00").unwrap()));
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assert_eq!(desc.file.size, Some(6144u64));
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assert_eq!(desc.file.range, None);
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assert_eq!(desc.file.hashes[0].algo, Algo::Sha_1);
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assert_eq!(desc.file.hashes[0].hash, base64::decode("w0mcJylzCn+AfvuGdqkty2+KP48=").unwrap());
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}
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#[test]
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fn test_request() {
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let elem: Element = r#"
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<description xmlns='urn:xmpp:jingle:apps:file-transfer:5'>
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<file>
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<hash xmlns='urn:xmpp:hashes:2'
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algo='sha-1'>w0mcJylzCn+AfvuGdqkty2+KP48=</hash>
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</file>
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</description>
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"#.parse().unwrap();
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let desc = Description::try_from(elem).unwrap();
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assert_eq!(desc.file.media_type, None);
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assert_eq!(desc.file.name, None);
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assert_eq!(desc.file.desc, None);
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assert_eq!(desc.file.date, None);
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assert_eq!(desc.file.size, None);
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assert_eq!(desc.file.range, None);
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assert_eq!(desc.file.hashes[0].algo, Algo::Sha_1);
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assert_eq!(desc.file.hashes[0].hash, base64::decode("w0mcJylzCn+AfvuGdqkty2+KP48=").unwrap());
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}
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}
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