Struct tor_proto::stream::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
impl AsyncWrite for DataStream
source§fn poll_write(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<IoResult<usize>>
fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8] ) -> Poll<IoResult<usize>>
buf
into the object. Read moresource§fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<IoResult<()>>
fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<IoResult<()>>
source§impl AsyncWrite for DataStream
Available on crate feature tokio
only.
impl AsyncWrite for DataStream
tokio
only.source§fn poll_write(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<IoResult<usize>>
fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8] ) -> Poll<IoResult<usize>>
buf
into the object. Read moresource§fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<IoResult<()>>
fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<IoResult<()>>
source§fn poll_shutdown(
self: Pin<&mut Self>,
cx: &mut Context<'_>
) -> Poll<IoResult<()>>
fn poll_shutdown( self: Pin<&mut Self>, cx: &mut Context<'_> ) -> Poll<IoResult<()>>
source§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 moresource§fn is_write_vectored(&self) -> bool
fn is_write_vectored(&self) -> bool
poll_write_vectored
implementation. Read moreAuto Trait Implementations§
impl !RefUnwindSafe for DataStream
impl Send for DataStream
impl !Sync for DataStream
impl Unpin for DataStream
impl !UnwindSafe for DataStream
Blanket Implementations§
source§impl<R> AsyncReadExt for R
impl<R> AsyncReadExt for R
source§fn chain<R>(self, next: R) -> Chain<Self, R>
fn chain<R>(self, next: R) -> Chain<Self, R>
source§fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> Read<'a, Self>where
Self: Unpin,
fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> Read<'a, Self>where
Self: Unpin,
buf
in asynchronous
manner, returning a future type. Read moresource§fn read_vectored<'a>(
&'a mut self,
bufs: &'a mut [IoSliceMut<'a>]
) -> ReadVectored<'a, Self>where
Self: Unpin,
fn read_vectored<'a>(
&'a mut self,
bufs: &'a mut [IoSliceMut<'a>]
) -> ReadVectored<'a, Self>where
Self: Unpin,
AsyncRead
into bufs
using vectored
IO operations. Read moresource§fn read_exact<'a>(&'a mut self, buf: &'a mut [u8]) -> ReadExact<'a, Self>where
Self: Unpin,
fn read_exact<'a>(&'a mut self, buf: &'a mut [u8]) -> ReadExact<'a, Self>where
Self: Unpin,
buf
,
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fn read_to_end<'a>(&'a mut self, buf: &'a mut Vec<u8>) -> ReadToEnd<'a, Self>where
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AsyncRead
. Read moresource§fn read_to_string<'a>(
&'a mut self,
buf: &'a mut String
) -> ReadToString<'a, Self>where
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fn read_to_string<'a>(
&'a mut self,
buf: &'a mut String
) -> ReadToString<'a, Self>where
Self: Unpin,
AsyncRead
. Read moresource§impl<R> AsyncReadExt for R
impl<R> AsyncReadExt for R
source§fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> ReadFuture<'a, Self>where
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fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> ReadFuture<'a, Self>where
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&'a mut self,
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) -> ReadVectoredFuture<'a, Self>where
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bufs: &'a mut [IoSliceMut<'a>]
) -> ReadVectoredFuture<'a, Self>where
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&'a mut self,
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) -> ReadToEndFuture<'a, Self>where
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fn read_to_end<'a>(
&'a mut self,
buf: &'a mut Vec<u8>
) -> ReadToEndFuture<'a, Self>where
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&'a mut self,
buf: &'a mut String
) -> ReadToStringFuture<'a, Self>where
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&'a mut self,
buf: &'a mut String
) -> ReadToStringFuture<'a, Self>where
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buf
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impl<R> AsyncReadExt for R
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bufs: &'a mut [IoSliceMut<'a>]
) -> ReadVectoredFuture<'a, Self>where
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&'a mut self,
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) -> ReadToEndFuture<'a, Self>where
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&'a mut self,
buf: &'a mut Vec<u8>
) -> ReadToEndFuture<'a, Self>where
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&'a mut self,
buf: &'a mut String
) -> ReadToStringFuture<'a, Self>where
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&'a mut self,
buf: &'a mut String
) -> ReadToStringFuture<'a, Self>where
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Self: Unpin,
buf
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impl<R> AsyncReadExt for R
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Self: Unpin,
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buf
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
source§fn read_f32_le(&mut self) -> ReadF32Le<&mut Self>where
Self: Unpin,
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Self: Unpin,
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Self: Unpin,
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Self: Unpin,
source§fn read_to_end<'a>(&'a mut self, buf: &'a mut Vec<u8>) -> ReadToEnd<'a, Self>where
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fn read_to_end<'a>(&'a mut self, buf: &'a mut Vec<u8>) -> ReadToEnd<'a, Self>where
Self: Unpin,
buf
. Read moresource§impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
source§fn flush(&mut self) -> Flush<'_, Self>where
Self: Unpin,
fn flush(&mut self) -> Flush<'_, Self>where
Self: Unpin,
AsyncWrite
. Read moresource§fn close(&mut self) -> Close<'_, Self>where
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fn close(&mut self) -> Close<'_, Self>where
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AsyncWrite
.source§fn write<'a>(&'a mut self, buf: &'a [u8]) -> Write<'a, Self>where
Self: Unpin,
fn write<'a>(&'a mut self, buf: &'a [u8]) -> Write<'a, Self>where
Self: Unpin,
buf
into the object. Read moresource§fn write_vectored<'a>(
&'a mut self,
bufs: &'a [IoSlice<'a>]
) -> WriteVectored<'a, Self>where
Self: Unpin,
fn write_vectored<'a>(
&'a mut self,
bufs: &'a [IoSlice<'a>]
) -> WriteVectored<'a, Self>where
Self: Unpin,
bufs
into the object using vectored
IO operations. Read moresource§impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
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Self: Unpin,
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&'a mut self,
bufs: &'a [IoSlice<'a>]
) -> WriteVectoredFuture<'a, Self>where
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&'a mut self,
bufs: &'a [IoSlice<'a>]
) -> WriteVectoredFuture<'a, Self>where
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source§fn boxed_writer<'a>(self) -> Pin<Box<dyn AsyncWrite + Send + 'a>>
fn boxed_writer<'a>(self) -> Pin<Box<dyn AsyncWrite + Send + 'a>>
alloc
only.dyn AsyncWrite + Send + 'a
. Read moresource§impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
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Self: Unpin,
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&'a mut self,
bufs: &'a [IoSlice<'a>]
) -> WriteVectoredFuture<'a, Self>where
Self: Unpin,
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&'a mut self,
bufs: &'a [IoSlice<'a>]
) -> WriteVectoredFuture<'a, Self>where
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alloc
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. Read moresource§impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
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