Struct arti_client::DataStream
source · pub struct DataStream { /* private fields */ }
Expand description
An anonymized stream over the Tor network.
For most purposes, you can think of this type as an anonymized TCP stream: it can read and write data, and get closed when it’s done.
DataStream
implements [futures::io::AsyncRead
] and
[futures::io::AsyncWrite
], so you can use it anywhere that those
traits are expected.
Examples
Connecting to an HTTP server and sending a request, using
AsyncWriteExt::write_all
:
let mut stream = tor_client.connect(("icanhazip.com", 80), None).await?;
use futures::io::AsyncWriteExt;
stream
.write_all(b"GET / HTTP/1.1\r\nHost: icanhazip.com\r\nConnection: close\r\n\r\n")
.await?;
// Flushing the stream is important; see below!
stream.flush().await?;
Reading the result, using AsyncReadExt::read_to_end
:
use futures::io::AsyncReadExt;
let mut buf = Vec::new();
stream.read_to_end(&mut buf).await?;
println!("{}", String::from_utf8_lossy(&buf));
Usage with Tokio
If the tokio
crate feature is enabled, this type also implements
tokio::io::AsyncRead
and
tokio::io::AsyncWrite
for easier integration
with code that expects those traits.
Remember to call flush
!
DataStream buffers data internally, in order to write as few cells
as possible onto the network. In order to make sure that your
data has actually been sent, you need to make sure that
[AsyncWrite::poll_flush
] runs to completion: probably via
AsyncWriteExt::flush
.
Splitting the type
This type is internally composed of a DataReader
and a DataWriter
; the
DataStream::split
method can be used to split it into those two parts, for more
convenient usage with e.g. stream combinators.
Implementations§
source§impl DataStream
impl DataStream
sourcepub fn split(self) -> (DataReader, DataWriter)
pub fn split(self) -> (DataReader, DataWriter)
Divide this DataStream into its constituent parts.
sourcepub fn circuit(&self) -> &ClientCirc
Available on crate feature experimental-api
only.
pub fn circuit(&self) -> &ClientCirc
experimental-api
only.Return a reference to this stream’s circuit?
This is an experimental API; it is not covered by semver guarantee. It is likely to change or disappear in a future release.
TODO: Should there be an AttachedToCircuit trait that we use for all client stream types? Should this return an Option<&ClientCirc>?
TODO RPC: Perhaps we should deprecate this in favor of stream.ctrl().circuit()
.
sourcepub fn ctrl(&self) -> &Arc<DataStreamCtrl>
Available on crate feature stream-ctrl
only.
pub fn ctrl(&self) -> &Arc<DataStreamCtrl>
stream-ctrl
only.Return a DataStreamCtrl
object that can be used to monitor and
interact with this stream without holding the stream itself.
Trait Implementations§
source§impl AsyncRead for DataStream
Available on crate feature tokio
only.
impl AsyncRead for DataStream
tokio
only.source§impl AsyncRead for DataStream
impl AsyncRead for DataStream
source§impl AsyncWrite for DataStream
Available on crate feature tokio
only.
impl AsyncWrite for DataStream
tokio
only.source§fn poll_write(
self: Pin<&mut DataStream>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<Result<usize, Error>>
fn poll_write( self: Pin<&mut DataStream>, cx: &mut Context<'_>, buf: &[u8] ) -> Poll<Result<usize, Error>>
buf
into the object. Read moresource§fn poll_flush(
self: Pin<&mut DataStream>,
cx: &mut Context<'_>
) -> Poll<Result<(), Error>>
fn poll_flush( self: Pin<&mut DataStream>, cx: &mut Context<'_> ) -> Poll<Result<(), Error>>
source§fn poll_shutdown(
self: Pin<&mut DataStream>,
cx: &mut Context<'_>
) -> Poll<Result<(), Error>>
fn poll_shutdown( self: Pin<&mut DataStream>, cx: &mut Context<'_> ) -> Poll<Result<(), Error>>
§fn poll_write_vectored(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
bufs: &[IoSlice<'_>]
) -> Poll<Result<usize, Error>>
fn poll_write_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>] ) -> Poll<Result<usize, Error>>
poll_write
, except that it writes from a slice of buffers. Read more§fn is_write_vectored(&self) -> bool
fn is_write_vectored(&self) -> bool
poll_write_vectored
implementation. Read moresource§impl AsyncWrite for DataStream
impl AsyncWrite for DataStream
source§fn poll_write(
self: Pin<&mut DataStream>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<Result<usize, Error>>
fn poll_write( self: Pin<&mut DataStream>, cx: &mut Context<'_>, buf: &[u8] ) -> Poll<Result<usize, Error>>
buf
into the object. Read moresource§fn poll_flush(
self: Pin<&mut DataStream>,
cx: &mut Context<'_>
) -> Poll<Result<(), Error>>
fn poll_flush( self: Pin<&mut DataStream>, cx: &mut Context<'_> ) -> Poll<Result<(), Error>>
Auto Trait Implementations§
impl !RefUnwindSafe for DataStream
impl Send for DataStream
impl !Sync for DataStream
impl Unpin for DataStream
impl !UnwindSafe for DataStream
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