180 lines
5.2 KiB
Rust
180 lines
5.2 KiB
Rust
//! Client for download management.
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use std::collections::BTreeMap;
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use std::convert::TryInto;
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use std::time::Duration;
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use serde::Serialize;
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use tokio::time::sleep;
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use crate::Error;
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mod payload;
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use payload::Request;
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use payload::Response;
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mod list;
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use list::FieldList;
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use list::TorrentList;
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pub mod torrent;
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use torrent::Torrent;
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use torrent::TorrentFile;
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use torrent::AddTorrent;
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use torrent::AddTorrentResponse;
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use torrent::GetTorrentFilesRequest;
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use torrent::GetTorrentFilesResponse;
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//use torrent::AddedTorrent;
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/// Interface into the major functions of Transmission
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/// including adding, and removing torrents.
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///
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/// The `Client` does not keep track of the created torrents itself.
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/// ```
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#[derive(Clone)]
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pub struct Client {
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host: String,
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port: u16,
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tls: bool,
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auth: Option<(String, String)>,
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base_url: String,
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session_id: Option<String>,
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http: reqwest::Client,
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}
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impl Client {
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// TODO: Take Option<(&str, &str)> for auth
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pub fn new(host: impl ToString, port: u16, tls: bool, auth: Option<(String, String)>) -> Result<Self, Error> {
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let mut headers = reqwest::header::HeaderMap::new();
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headers.insert(reqwest::header::USER_AGENT, "transmission-rs/0.1".try_into()?);
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let this = Self{
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host: host.to_string(),
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port: port,
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tls: tls,
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auth: auth,
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base_url: {
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let protocol = match tls {
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true => "https",
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false => "http"
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};
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format!("{}://{}:{}", protocol, host.to_string(), port)
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},
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session_id: None,
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http: reqwest::Client::builder()
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.gzip(true)
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.default_headers(headers)
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.build()?
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};
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Ok(this)
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}
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fn build_url(&self, path: impl AsRef<str>) -> String {
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format!("{}{}", self.base_url, path.as_ref()).to_string()
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}
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pub async fn authenticate(&mut self) -> Result<(), Error> {
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self.session_id = None;
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let response = self.post("/transmission/rpc/")
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.header("Content-Type", "application/x-www-form-urlencoded")
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.send()
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.await?;
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self.session_id = match response.headers().get("X-Transmission-Session-Id") {
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Some(v) => Some(v.to_str()?.to_string()),
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None => None // TODO: Return an error
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};
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Ok(())
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}
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pub fn post(&self, path: impl AsRef<str>) -> reqwest::RequestBuilder {
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let url = self.build_url(path);
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//println!("{}", url);
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let mut request = self.http.post(&url);
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request = match &self.auth {
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Some(auth) => request.basic_auth(&auth.0, Some(&auth.1)),
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None => request
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};
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request = match &self.session_id {
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Some(token) => request.header("X-Transmission-Session-Id", token),
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None => request
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};
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request
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}
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pub async fn rpc(&mut self, method: impl ToString, tag: u8, body: impl Serialize) -> Result<reqwest::Response, Error> {
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let request = Request::new(method, tag, body);
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let mut error = None;
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for i in 0..5 {
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sleep(Duration::from_secs(i)).await;
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let result = self.post("/transmission/rpc/")
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// Content-Type doesn't actually appear to be necessary, and is
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// technically a lie, since there's no key/value being passed,
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// just some JSON, but the official client sends this, so we
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// will too.
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.header("Content-Type", "application/x-www-form-urlencoded")
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.body(serde_json::to_string(&request)?)
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.send().await?
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.error_for_status();
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match result {
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Ok(r) => return Ok(r),
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Err(e) => match e.status() {
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Some(reqwest::StatusCode::CONFLICT) => {
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self.authenticate().await?;
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error = Some(e);
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continue;
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},
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_ => return Err(e.into())
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}
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};
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}
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match error {
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Some(e) => Err(e.into()),
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// Should be unreachable
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None => Err(Error::HTTPUnknown)
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}
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}
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pub async fn list(&mut self) -> Result<Vec<Torrent>, Error> {
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let field_list = FieldList::from_vec(vec![
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"error",
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"errorString",
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"eta",
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"id",
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"isFinished",
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"leftUntilDone",
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"name",
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"peersGettingFromUs",
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"peersSendingToUs",
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"rateDownload",
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"rateUpload",
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"sizeWhenDone",
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"status",
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"uploadRatio"
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]);
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let response: Response<TorrentList> = self.rpc("torrent-get", 4, field_list).await?.error_for_status()?.json().await?;
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Ok(response.arguments.torrents)
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}
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// TODO: Borrow key from value
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pub async fn list_by_name(&mut self) -> Result<BTreeMap<String, Torrent>, Error> {
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Ok(self.list().await?.into_iter().map(|v| (v.name.clone(), v)).collect::<BTreeMap<_, _>>())
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}
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pub async fn add_torrent_from_link(&mut self, url: impl ToString) -> Result<AddTorrentResponse, Error> {
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let response: Response<AddTorrentResponse> = self.rpc("torrent-add", 8, AddTorrent{filename: url.to_string()}).await?.error_for_status()?.json().await?;
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Ok(response.arguments)
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}
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pub async fn get_files_by_id(&mut self, id: u16) -> Result<Vec<TorrentFile>, Error> {
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let response: Response<GetTorrentFilesResponse> = self.rpc("torrent-get", 3, GetTorrentFilesRequest::new(id)).await?.error_for_status()?.json().await?;
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if(response.arguments.torrents.len() == 0) {
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// TODO: Maybe make the Ok result an Option? Or maybe return a 404 error?
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return Ok(vec![]);
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} else if(response.arguments.torrents.len() > 1) {
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return Err(Error::WeirdGetFilesResponse);
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}
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// TODO: Figure out how to move files out of this structure, since we're discarding the rest anyway, instead of cloning
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Ok(response.arguments.torrents[0].files.clone())
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}
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}
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