10 changed files with 725 additions and 19 deletions
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25src/client.rs
-
14src/client/download.rs
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150src/client_actor.rs
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51src/client_actor/error.rs
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78src/client_actor/message.rs
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118src/client_actor/util.rs
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220src/client_new.rs
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35src/client_new/error.rs
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47src/client_new/util.rs
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2src/main.rs
@ -0,0 +1,150 @@ |
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mod message;
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mod error;
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mod util;
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use std::{collections::HashMap, path::Path};
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use error::ClientActorError;
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use http::{HeaderMap, Uri};
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use message::{ClientActorMessage, ClientActorMessageHandle, DownloadState};
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use tokio::{sync::{mpsc, oneshot}, task::JoinSet};
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use super::client_new::Client;
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type ActionIndex = u64;
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type ClientTaskResult = Result<Option<ClientActorMessageHandle>, ClientActorError>;
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type DownloadResult = Result<Option<DownloadState>, ClientActorError>;
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#[derive(Debug)]
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struct ClientActor {
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client: Client,
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tasks: JoinSet<ClientTaskResult>,
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max_tasks: usize,
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actions: HashMap<ActionIndex, ClientActorMessage>,
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actions_idx: ActionIndex,
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receiver: mpsc::Receiver<ClientActorMessage>,
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}
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pub(super) struct ClientActorHandle {
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sender: mpsc::Sender<ClientActorMessage>,
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abort: oneshot::Sender<ClientTaskResult>,
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}
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impl ClientActor {
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fn new( client: Client
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, max_tasks: usize |
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, receiver: mpsc::Receiver<ClientActorMessage>
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, abort_rx: oneshot::Receiver<ClientTaskResult> ) -> anyhow::Result<Self> {
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let mut tasks = JoinSet::new();
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tasks.spawn(async move {
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let _ = abort_rx.await;
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Ok(None)
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});
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let actions = HashMap::new();
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let actions_idx = 0;
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Ok(Self {
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client,
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tasks,
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max_tasks,
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actions,
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actions_idx,
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receiver })
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}
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async fn handle_message(&mut self, message: ClientActorMessage) {
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self.actions.insert(self.actions_idx, message);
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use ClientActorMessage::{Download, GetData};
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match self.actions.get(&self.actions_idx) {
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Some(Download { ref filename, ref uri, .. }) => {
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// spawn a task that does the work
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let mut client = self.client.clone();
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let filename = filename.to_path_buf();
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let uri = uri.clone();
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let message = self.actions_idx;
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let handle = ClientActorMessageHandle::Download {
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filename,
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uri,
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state: None,
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message,
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};
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self.tasks.spawn(async move {
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client.download(handle.filename(), &handle.uri(), &HeaderMap::new()).await
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. map_err(|source| ClientActorError { action: handle.clone()
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, source })?;
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Ok(Some(handle))
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});
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},
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Some(GetData { ref uri, .. }) => {
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// spawn a task that does the work
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let mut client = self.client.clone();
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let uri = uri.clone();
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let handle = ClientActorMessageHandle::GetData {
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uri,
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buffer: None,
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message: self.actions_idx,
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};
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self.tasks.spawn(async move {
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client.data(&handle.uri(), &HeaderMap::new()).await
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. map_err(|source| ClientActorError { action: handle.clone()
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, source })?;
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Ok(Some(handle))
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});
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},
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None => (),
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}
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self.actions_idx += 1;
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}
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}
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impl ClientActorHandle {
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pub(super) fn new(client: Client, max_tasks: usize) -> Self {
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let (sender, receiver) = mpsc::channel(1);
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let (abort, abort_rx) = oneshot::channel::<ClientTaskResult>();
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let actor = ClientActor::new(client, max_tasks, receiver, abort_rx )
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. expect("Client create error");
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tokio::spawn(util::run_client(actor));
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Self { sender, abort }
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}
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pub(super) fn stop(self) {
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let _ = self.abort.send(Ok(None));
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drop(self.sender);
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}
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pub(super) async fn download( &self
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, filename: impl AsRef<Path>
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, uri: &Uri ) -> DownloadResult {
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let filename = filename.as_ref().to_path_buf();
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let uri = uri.to_owned();
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let (send, receive) = oneshot::channel();
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let msg = ClientActorMessage::Download { filename, uri, respond_to: send };
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let _ = self.sender.send(msg).await;
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receive.await.expect("Actor cancelled unexpected")
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}
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pub(super) async fn body_bytes(&self, uri: &Uri) -> Option<Vec<u8>> {
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let uri = uri.to_owned();
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let (send, receive) = oneshot::channel();
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let msg = ClientActorMessage::GetData { uri, respond_to: send };
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let _ = self.sender.send(msg).await;
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receive.await.expect("Actor cancelled unexpected")
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}
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}
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@ -0,0 +1,51 @@ |
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use std::{error, fmt};
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use super::message::ClientActorMessageHandle;
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/*
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#[macro_export]
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macro_rules! mk_ca_error {
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($message:ident, $($err:tt)*) => {{
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use $crate::client::error;
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error::ClientActorError::new( $message.clone()
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, anyhow::anyhow!($($err)*) )
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}};
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}
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#[macro_export]
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macro_rules! map_ca_error {
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($message:ident) => {{
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use $crate::client::error;
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|e| error::ClientActorError::new( $message.clone()
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, anyhow::anyhow!(format!("{:?}", e)) )
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}};
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}
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*/
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#[derive(Debug)]
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pub(super) struct ClientActorError {
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pub(super) action: ClientActorMessageHandle,
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pub(super) source: anyhow::Error,
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}
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impl ClientActorError {
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pub(super) fn new( action: ClientActorMessageHandle
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, source: anyhow::Error ) -> Self {
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let action = action.to_owned();
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Self { action, source }
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}
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}
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impl error::Error for ClientActorError {
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fn source(&self) -> Option<&(dyn error::Error + 'static)> {
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Some(self.source.as_ref())
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}
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}
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impl fmt::Display for ClientActorError {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "download error ({:?}): {}", self.action, self.source)
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}
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}
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@ -0,0 +1,78 @@ |
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use std::path::PathBuf;
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use http::Uri;
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use tokio::sync::oneshot;
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use super::error::ClientActorError;
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type ActionIndex = u64;
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type DownloadResult = Result<Option<DownloadState>, ClientActorError>;
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#[derive(Clone, Debug)]
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pub enum DownloadState {
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GotHead,
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#[allow(dead_code)]
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Partial { content_type: Option<String> },
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Done { content_type: Option<String> },
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}
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#[derive(Debug)]
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pub(super) enum ClientActorMessage {
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Download {
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filename: PathBuf,
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uri: Uri,
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respond_to: oneshot::Sender<DownloadResult>,
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},
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GetData {
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uri: Uri,
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respond_to: oneshot::Sender<Option<Vec<u8>>>,
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},
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}
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#[derive(Clone, Debug)]
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pub(super) enum ClientActorMessageHandle {
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Download {
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filename: PathBuf,
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uri: Uri,
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state: Option<DownloadState>,
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message: ActionIndex,
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},
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GetData {
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uri: Uri,
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buffer: Option<Vec<u8>>,
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message: ActionIndex,
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},
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}
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impl ClientActorMessageHandle {
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pub(super) fn set_state(&mut self, new_state: DownloadState) {
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match self {
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Self::Download { ref mut state, .. } => *state = Some(new_state),
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_ => panic!("Called with invalid variant"),
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};
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}
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pub(super) fn filename(&self) -> PathBuf {
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match self {
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Self::Download { ref filename, .. } => filename.clone(),
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_ => panic!("Called with invalid variant"),
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}
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}
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pub(super) fn uri(&self) -> Uri {
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match self {
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Self::Download { ref uri, .. } => uri.clone(),
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Self::GetData { ref uri, .. } => uri.clone(),
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}
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}
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pub(super) fn buffer_mut(&mut self) -> &mut Option<Vec<u8>> {
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match self {
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Self::GetData { ref mut buffer, .. } => buffer,
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_ => panic!("Called with invalid variant"),
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}
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}
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}
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@ -0,0 +1,118 @@ |
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use http::HeaderMap;
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use log::{error, info};
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use tokio::select;
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use super::{
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error::ClientActorError,
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message::{ClientActorMessage, ClientActorMessageHandle},
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ClientActor,
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ClientTaskResult,
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};
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async fn process_next_result(mut actor: ClientActor, result: ClientTaskResult) -> ClientActor {
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use ClientActorMessageHandle::{Download, GetData};
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match result {
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Err(e) => {
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info!("Retry failed download: {:?}", e);
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// retry ... instead of responing here we could also respond
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// with something that in turn would be used to retry...
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let mut client = actor.client.clone();
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actor.tasks.spawn(async move {
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match e.action {
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Download { .. } => {
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client.download( e.action.filename()
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, &e.action.uri()
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, &HeaderMap::new() ).await
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. map_err(|source| ClientActorError { action: e.action.clone()
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, source })?;
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Ok(Some(e.action))
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},
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GetData { .. } => {
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client.data(&e.action.uri(), &HeaderMap::new()).await
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. map_err(|source| ClientActorError { action: e.action.clone()
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, source })?;
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Ok(Some(e.action))
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},
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}
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});
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},
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// when the task finishes
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Ok(Some(action)) => {
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match action {
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Download { ref uri, ref state, ref message, .. } => {
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info!("Done download: {:?}", uri);
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if let Some((_, message)) = actor.actions.remove_entry(message) {
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use ClientActorMessage::Download;
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match message {
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Download { respond_to, .. } => {
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let _ = respond_to.send(Ok(state.clone()));
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},
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_ => panic!("Wrong variant ... this should never happen"),
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}
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} else {
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panic!("Lost a message");
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}
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},
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GetData { ref uri, ref buffer, ref message } => {
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info!("Done get_data: {:?}", uri);
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if let Some((_, message)) = actor.actions.remove_entry(message) {
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use ClientActorMessage::GetData;
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match message {
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GetData { respond_to, .. } => {
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let _ = respond_to.send(buffer.clone());
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},
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_ => panic!("Wrong variant ... this should never happen"),
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}
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} else {
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panic!("Lost a message");
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}
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},
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}
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},
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// Got a stop message...here we still continue procession until the
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// JoinSet is empty.
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Ok(None) => (),
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};
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actor
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}
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pub(super) async fn run_client(mut actor: ClientActor) {
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loop {
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if actor.tasks.len() >= actor.max_tasks {
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if let Some(join) = actor.tasks.join_next().await {
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match join {
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Err(e) => {
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error!("FATAL Join failed: {}", e);
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break
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},
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Ok(result) => actor = process_next_result(actor, result).await,
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}
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};
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} else {
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select! {
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Some(join) = actor.tasks.join_next() => {
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match join {
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Err(e) => {
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error!("FATAL Join failed: {}", e);
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break
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},
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Ok(result) => actor = process_next_result(actor, result).await,
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}
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}
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Some(message) = actor.receiver.recv() => {
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actor.handle_message(message).await;
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}
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else => {}
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}
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}
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}
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}
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@ -0,0 +1,220 @@ |
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mod error;
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mod util;
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use std::{path::Path, time::Duration};
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use anyhow::anyhow;
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use clap::{crate_name, crate_version};
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use error::RequestError;
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use futures_util::StreamExt as _;
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use http::{
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header::{CONTENT_LENGTH, CONTENT_TYPE, ORIGIN, RANGE, USER_AGENT}, request::Builder as RequestBuilder, HeaderMap, HeaderValue, Request, Response, Uri
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};
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use http_body_util::BodyDataStream;
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use log::debug;
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use reqwest::{redirect::Policy, Body};
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use tokio::{
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fs::File,
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io::AsyncWriteExt as _,
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time::timeout
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};
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use tower::{util::BoxCloneService, ServiceBuilder, ServiceExt as _};
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use tower_http::decompression::{DecompressionBody, DecompressionLayer};
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use tower_http_client::{client::BodyReader, ServiceExt as _};
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use tower_reqwest::HttpClientLayer;
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type ClientBody = DecompressionBody<Body>;
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type ClientResponse = Response<ClientBody>;
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type ClientResponseResult = Result<ClientResponse, RequestError>;
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type HttpClient = BoxCloneService<Request<Body>, ClientResponse, anyhow::Error>;
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#[derive(Clone, Debug)]
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pub(super) struct Client {
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client: HttpClient,
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default_headers: HeaderMap,
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body_timeout: Option<Duration>,
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}
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impl Client {
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pub(super) fn new( buffer: usize |
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, rate_limit: u64 |
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, concurrency_limit: usize |
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, timeout: Duration ) -> anyhow::Result<Self> {
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let client = ServiceBuilder::new()
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// Add some layers.
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. buffer(buffer)
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. rate_limit(rate_limit, Duration::from_secs(1))
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. concurrency_limit(concurrency_limit)
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. timeout(timeout)
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. layer(DecompressionLayer::new())
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// Make client compatible with the `tower-http` layers.
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. layer(HttpClientLayer)
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. service( reqwest::Client::builder()
|
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. redirect(Policy::limited(5))
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. build()? )
|
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. map_err(anyhow::Error::msg)
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. boxed_clone();
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|
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let body_timeout = None;
|
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let mut default_headers = HeaderMap::new();
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default_headers.insert(
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USER_AGENT,
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HeaderValue::from_str(&( crate_name!().to_string() + "/"
|
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+ crate_version!() )).unwrap() );
|
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|
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Ok(Self {client, default_headers, body_timeout})
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}
|
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|
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fn set_body_timeout(mut self, timeout: Option<Duration>) -> Self {
|
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self.body_timeout = timeout;
|
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self
|
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}
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|
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fn set_origin(mut self, origin: Option<String>) -> Self {
|
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if let Some(origin) = origin {
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self.default_headers.insert(
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ORIGIN,
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HeaderValue::from_str(&origin).unwrap() );
|
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} else {
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self.default_headers.remove(ORIGIN);
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}
|
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self
|
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}
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|
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fn set_user_agent(mut self, user_agent: Option<String>) -> Self {
|
|||
if let Some(user_agent) = user_agent {
|
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self.default_headers.insert(
|
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USER_AGENT,
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HeaderValue::from_str(&user_agent).unwrap() );
|
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} else {
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self.default_headers.remove(USER_AGENT);
|
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}
|
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self
|
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}
|
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|
|||
pub(super) async fn data( &mut self
|
|||
, uri: &Uri
|
|||
, headers: &HeaderMap )
|
|||
-> anyhow::Result<Vec<u8>> {
|
|||
|
|||
let mut response = self.request("GET", uri, headers).await?;
|
|||
|
|||
// read body into Vec<u8>
|
|||
let body = BodyReader::new(response.body_mut())
|
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. bytes()
|
|||
. await
|
|||
. map_err(|e| anyhow!(e))?
|
|||
. to_vec();
|
|||
|
|||
Ok(body)
|
|||
}
|
|||
|
|||
pub(super) async fn download( &mut self
|
|||
, filename: impl AsRef<Path>
|
|||
, uri: &Uri
|
|||
, headers: &HeaderMap )
|
|||
-> anyhow::Result<Option<(String, usize)>> {
|
|||
|
|||
let filename = filename.as_ref();
|
|||
|
|||
// - get all informations to eventually existing file
|
|||
let mut from = util::file_size(&filename).await;
|
|||
|
|||
// - get infos to uri
|
|||
let response_headers = &self.head(uri, headers).await?;
|
|||
let content_length = util::get_header::<u64>( response_headers
|
|||
, CONTENT_LENGTH );
|
|||
let content_type = util::get_header::<String>( response_headers
|
|||
, CONTENT_TYPE )
|
|||
. or(Some("unknown".into()));
|
|||
|
|||
if let Some(content_length) = content_length {
|
|||
if from != 0 && content_length - 1 <= from {
|
|||
return Ok(None);
|
|||
}
|
|||
} else {
|
|||
from = 0;
|
|||
}
|
|||
|
|||
// - do the neccessry request.
|
|||
let headers = &mut headers.clone();
|
|||
headers.insert(RANGE, format!("bytes={}-", from).parse().unwrap());
|
|||
|
|||
let mut response = self.request("GET", uri, headers).await?;
|
|||
|
|||
// - open or create file
|
|||
let file = util::open_or_create(&response.status(), &filename).await;
|
|||
// - download Data
|
|||
let size = self.clone().store_body(file, response.body_mut()).await?;
|
|||
|
|||
Ok(content_type.map(|c| (c, size)))
|
|||
}
|
|||
|
|||
async fn head( &mut self
|
|||
, uri: &Uri
|
|||
, headers: &HeaderMap ) -> Result<HeaderMap, RequestError> {
|
|||
Ok( self.request("HEAD", uri, headers)
|
|||
. await?
|
|||
. headers()
|
|||
. clone() )
|
|||
}
|
|||
|
|||
async fn request( &mut self
|
|||
, method: &str |
|||
, uri: &Uri
|
|||
, headers: &HeaderMap ) -> ClientResponseResult {
|
|||
let mut request = RequestBuilder::new()
|
|||
. method(method)
|
|||
. uri(uri)
|
|||
. body(Body::default())
|
|||
. map_err(|e| RequestError::new(None, Some(e.into())))?;
|
|||
|
|||
request.headers_mut().extend(headers.clone());
|
|||
|
|||
debug!("Request: {:?}", request);
|
|||
|
|||
match self.client.execute(request).await {
|
|||
Err(e) => Err(RequestError::new(None, Some(e))),
|
|||
Ok(response) => {
|
|||
debug!("Response: {:?}", response.headers());
|
|||
|
|||
if response.status().is_success() {
|
|||
Ok(response)
|
|||
} else {
|
|||
Err(RequestError::new(Some(response.map(|_| ())), None))
|
|||
}
|
|||
},
|
|||
}
|
|||
}
|
|||
|
|||
async fn store_body( self
|
|||
, mut file: File
|
|||
, body: &mut ClientBody ) -> anyhow::Result<usize> {
|
|||
let mut body = BodyDataStream::new(body);
|
|||
let mut written = 0;
|
|||
|
|||
loop {
|
|||
let data_future = body.next();
|
|||
let data = if let Some(io_timeout) = self.body_timeout {
|
|||
// give timeout somehow... probably from client.
|
|||
timeout(io_timeout, data_future).await?
|
|||
} else {
|
|||
data_future.await
|
|||
};
|
|||
|
|||
match data {
|
|||
None => break,
|
|||
Some(Err(e)) => Err(anyhow!(e))?,
|
|||
Some(Ok(data)) => {
|
|||
written += data.len();
|
|||
file . write_all(&data).await?;
|
|||
file . flush().await?;
|
|||
},
|
|||
}
|
|||
};
|
|||
|
|||
Ok(written)
|
|||
}
|
|||
}
|
|||
@ -0,0 +1,35 @@ |
|||
use std::{error, fmt};
|
|||
|
|||
use http::Response;
|
|||
|
|||
|
|||
#[derive(Debug)]
|
|||
pub(super) struct RequestError {
|
|||
pub(super) response: Option<Response<()>>,
|
|||
pub(super) source: Option<anyhow::Error>,
|
|||
}
|
|||
|
|||
impl RequestError {
|
|||
pub(super) fn new( response: Option<Response<()>>
|
|||
, source: Option<anyhow::Error> ) -> Self {
|
|||
Self { response, source }
|
|||
}
|
|||
}
|
|||
|
|||
impl error::Error for RequestError {
|
|||
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
|
|||
match &self.source {
|
|||
None => None,
|
|||
Some(e) => Some(e.as_ref()),
|
|||
}
|
|||
}
|
|||
}
|
|||
|
|||
impl fmt::Display for RequestError {
|
|||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|||
match &self.source {
|
|||
None => write!(f, "request error: {:?}", self.response),
|
|||
Some(err) => write!(f, "request error ({:?}): {}", self.response, err),
|
|||
}
|
|||
}
|
|||
}
|
|||
@ -0,0 +1,47 @@ |
|||
use std::{io::ErrorKind, path::Path, str::FromStr};
|
|||
|
|||
use http::{HeaderMap, HeaderName, StatusCode};
|
|||
use tokio::fs::{symlink_metadata, File};
|
|||
|
|||
|
|||
pub(super) async fn file_size(filename: impl AsRef<Path>) -> u64 {
|
|||
// - get all informations to eventually existing file
|
|||
let filename = filename.as_ref();
|
|||
let metadata = match symlink_metadata(filename).await {
|
|||
Ok(metadata) => Some(metadata),
|
|||
Err(error) => match error.kind() {
|
|||
// If we can't write to a file we need to ... well theres nothing we can do
|
|||
ErrorKind::PermissionDenied => panic!("Permission denied on: {:?}", filename),
|
|||
_ => None,
|
|||
}
|
|||
};
|
|||
|
|||
metadata.map_or(0, |m| m.len())
|
|||
}
|
|||
|
|||
pub(super) fn get_header<T: FromStr>( headers: &HeaderMap
|
|||
, name: HeaderName) -> Option<T> {
|
|||
headers . get(name)
|
|||
. and_then(|h| h.to_str().ok())
|
|||
. and_then(|h| h.parse::<T>().ok())
|
|||
}
|
|||
|
|||
pub(super) async fn open_or_create( status: &StatusCode
|
|||
, filename: impl AsRef<Path>) -> File {
|
|||
match status {
|
|||
&StatusCode::PARTIAL_CONTENT =>
|
|||
// Here we assume that this response only comes if the requested
|
|||
// range can be fullfilled and thus is the data range in the
|
|||
// response. Thats why I do not check the content-range header.
|
|||
// If that assumption does not hold this needs to be fixed.
|
|||
File::options() . create(true)
|
|||
. append(true)
|
|||
. open(filename)
|
|||
. await
|
|||
. expect("can not create file for writing"),
|
|||
|
|||
_ =>
|
|||
File::create(filename) . await
|
|||
. expect("can not create file for writing"),
|
|||
}
|
|||
}
|
|||
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