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@ -6,6 +6,13 @@ mod message; |
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pub use self::{frame::CloseFrame, message::Message}; |
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pub use self::{frame::CloseFrame, message::Message}; |
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use log::*; |
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use std::{ |
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collections::VecDeque, |
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io::{ErrorKind as IoErrorKind, Read, Write}, |
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mem::replace, |
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}; |
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use self::{ |
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use self::{ |
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frame::{ |
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frame::{ |
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coding::{CloseCode, Control as OpCtl, Data as OpData, OpCode}, |
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coding::{CloseCode, Control as OpCtl, Data as OpData, OpCode}, |
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@ -17,11 +24,6 @@ use crate::{ |
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error::{Error, ProtocolError, Result}, |
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error::{Error, ProtocolError, Result}, |
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util::NonBlockingResult, |
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util::NonBlockingResult, |
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}; |
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}; |
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use log::*; |
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use std::{ |
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io::{ErrorKind as IoErrorKind, Read, Write}, |
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mem::replace, |
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}; |
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/// Indicates a Client or Server role of the websocket
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/// Indicates a Client or Server role of the websocket
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#[derive(Debug, Clone, Copy, PartialEq, Eq)] |
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#[derive(Debug, Clone, Copy, PartialEq, Eq)] |
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@ -35,21 +37,10 @@ pub enum Role { |
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/// The configuration for WebSocket connection.
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/// The configuration for WebSocket connection.
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#[derive(Debug, Clone, Copy)] |
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#[derive(Debug, Clone, Copy)] |
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pub struct WebSocketConfig { |
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pub struct WebSocketConfig { |
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/// Does nothing, instead use `max_write_buffer_size`.
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/// The size of the send queue. You can use it to turn on/off the backpressure features. `None`
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#[deprecated] |
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/// means here that the size of the queue is unlimited. The default value is the unlimited
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/// queue.
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pub max_send_queue: Option<usize>, |
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pub max_send_queue: Option<usize>, |
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/// The target minimum size of the write buffer to reach before writing the data
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/// to the underlying stream.
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/// The default value is 128 KiB.
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///
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/// Note: [`flush`](WebSocket::flush) will always fully write the buffer regardless.
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pub write_buffer_size: usize, |
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/// The max size of the write buffer in bytes. Setting this can provide backpressure
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/// in the case the write buffer is filling up due to write errors.
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/// The default value is unlimited.
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///
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/// Note: Should always be set higher than [`write_buffer_size`](Self::write_buffer_size).
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pub max_write_buffer_size: usize, |
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/// The maximum size of a message. `None` means no size limit. The default value is 64 MiB
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/// The maximum size of a message. `None` means no size limit. The default value is 64 MiB
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/// which should be reasonably big for all normal use-cases but small enough to prevent
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/// which should be reasonably big for all normal use-cases but small enough to prevent
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/// memory eating by a malicious user.
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/// memory eating by a malicious user.
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@ -69,11 +60,8 @@ pub struct WebSocketConfig { |
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impl Default for WebSocketConfig { |
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impl Default for WebSocketConfig { |
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fn default() -> Self { |
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fn default() -> Self { |
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#[allow(deprecated)] |
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WebSocketConfig { |
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WebSocketConfig { |
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max_send_queue: None, |
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max_send_queue: None, |
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write_buffer_size: 128 * 1024, |
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max_write_buffer_size: usize::MAX, |
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max_message_size: Some(64 << 20), |
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max_message_size: Some(64 << 20), |
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max_frame_size: Some(16 << 20), |
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max_frame_size: Some(16 << 20), |
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accept_unmasked_frames: false, |
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accept_unmasked_frames: false, |
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@ -85,8 +73,6 @@ impl Default for WebSocketConfig { |
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///
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///
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/// This is THE structure you want to create to be able to speak the WebSocket protocol.
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/// This is THE structure you want to create to be able to speak the WebSocket protocol.
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/// It may be created by calling `connect`, `accept` or `client` functions.
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/// It may be created by calling `connect`, `accept` or `client` functions.
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///
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/// Use [`WebSocket::read`], [`WebSocket::send`] to received and send messages.
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#[derive(Debug)] |
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#[derive(Debug)] |
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pub struct WebSocket<Stream> { |
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pub struct WebSocket<Stream> { |
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/// The underlying socket.
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/// The underlying socket.
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@ -160,116 +146,82 @@ impl<Stream> WebSocket<Stream> { |
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impl<Stream: Read + Write> WebSocket<Stream> { |
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impl<Stream: Read + Write> WebSocket<Stream> { |
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/// Read a message from stream, if possible.
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/// Read a message from stream, if possible.
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///
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///
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/// This will also queue responses to ping and close messages. These responses
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/// This will queue responses to ping and close messages to be sent. It will call
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/// will be written and flushed on the next call to [`read`](Self::read),
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/// `write_pending` before trying to read in order to make sure that those responses
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/// [`write`](Self::write) or [`flush`](Self::flush).
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/// make progress even if you never call `write_pending`. That does mean that they
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/// get sent out earliest on the next call to `read_message`, `write_message` or `write_pending`.
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///
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///
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/// # Closing the connection
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/// ## Closing the connection
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/// When the remote endpoint decides to close the connection this will return
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/// When the remote endpoint decides to close the connection this will return
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/// the close message with an optional close frame.
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/// the close message with an optional close frame.
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///
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///
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/// You should continue calling [`read`](Self::read), [`write`](Self::write) or
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/// You should continue calling `read_message`, `write_message` or `write_pending` to drive
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/// [`flush`](Self::flush) to drive the reply to the close frame until [`Error::ConnectionClosed`]
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/// the reply to the close frame until [Error::ConnectionClosed] is returned. Once that happens
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/// is returned. Once that happens it is safe to drop the underlying connection.
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/// it is safe to drop the underlying connection.
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pub fn read(&mut self) -> Result<Message> { |
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pub fn read_message(&mut self) -> Result<Message> { |
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self.context.read(&mut self.socket) |
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self.context.read_message(&mut self.socket) |
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} |
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/// Writes and immediately flushes a message.
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/// Equivalent to calling [`write`](Self::write) then [`flush`](Self::flush).
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pub fn send(&mut self, message: Message) -> Result<()> { |
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self.write(message)?; |
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self.flush() |
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} |
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} |
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/// Write a message to the provided stream, if possible.
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/// Send a message to stream, if possible.
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///
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/// A subsequent call should be made to [`flush`](Self::flush) to flush writes.
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///
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///
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/// In the event of stream write failure the message frame will be stored
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/// WebSocket will buffer a configurable number of messages at a time, except to reply to Ping
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/// in the write buffer and will try again on the next call to [`write`](Self::write)
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/// requests. A Pong reply will jump the queue because the
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/// or [`flush`](Self::flush).
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/// [websocket RFC](https://tools.ietf.org/html/rfc6455#section-5.5.2) specifies it should be sent
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/// as soon as is practical.
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///
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///
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/// If the write buffer would exceed the configured [`WebSocketConfig::max_write_buffer_size`]
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/// Note that upon receiving a ping message, tungstenite cues a pong reply automatically.
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/// [`Err(WriteBufferFull(msg_frame))`](Error::WriteBufferFull) is returned.
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/// When you call either `read_message`, `write_message` or `write_pending` next it will try to send
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///
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/// that pong out if the underlying connection can take more data. This means you should not
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/// This call will generally not flush. However, if there are queued automatic messages
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/// respond to ping frames manually.
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/// they will be written and eagerly flushed.
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///
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/// For example, upon receiving ping messages tungstenite queues pong replies automatically.
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/// The next call to [`read`](Self::read), [`write`](Self::write) or [`flush`](Self::flush)
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/// will write & flush the pong reply. This means you should not respond to ping frames manually.
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///
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///
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/// You can however send pong frames manually in order to indicate a unidirectional heartbeat
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/// You can however send pong frames manually in order to indicate a unidirectional heartbeat
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/// as described in [RFC 6455](https://tools.ietf.org/html/rfc6455#section-5.5.3). Note that
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/// as described in [RFC 6455](https://tools.ietf.org/html/rfc6455#section-5.5.3). Note that
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/// if [`read`](Self::read) returns a ping, you should [`flush`](Self::flush) before passing
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/// if `read_message` returns a ping, you should call `write_pending` until it doesn't return
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/// a custom pong to [`write`](Self::write), otherwise the automatic queued response to the
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/// WouldBlock before passing a pong to `write_message`, otherwise the response to the
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/// ping will not be sent as it will be replaced by your custom pong message.
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/// ping will not be sent, but rather replaced by your custom pong message.
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///
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///
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/// # Errors
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/// ## Errors
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/// - If the WebSocket's write buffer is full, [`Error::WriteBufferFull`] will be returned
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/// - If the WebSocket's send queue is full, `SendQueueFull` will be returned
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/// along with the equivalent passed message frame.
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/// along with the passed message. Otherwise, the message is queued and Ok(()) is returned.
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/// - If the connection is closed and should be dropped, this will return [`Error::ConnectionClosed`].
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/// - If the connection is closed and should be dropped, this will return [Error::ConnectionClosed].
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/// - If you try again after [`Error::ConnectionClosed`] was returned either from here or from
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/// - If you try again after [Error::ConnectionClosed] was returned either from here or from `read_message`,
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/// [`read`](Self::read), [`Error::AlreadyClosed`] will be returned. This indicates a program
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/// [Error::AlreadyClosed] will be returned. This indicates a program error on your part.
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/// error on your part.
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/// - [Error::Io] is returned if the underlying connection returns an error
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/// - [`Error::Io`] is returned if the underlying connection returns an error
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/// (consider these fatal except for WouldBlock).
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/// (consider these fatal except for WouldBlock).
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/// - [`Error::Capacity`] if your message size is bigger than the configured max message size.
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/// - [Error::Capacity] if your message size is bigger than the configured max message size.
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pub fn write(&mut self, message: Message) -> Result<()> { |
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pub fn write_message(&mut self, message: Message) -> Result<()> { |
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self.context.write(&mut self.socket, message) |
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self.context.write_message(&mut self.socket, message) |
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} |
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} |
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/// Flush writes.
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/// Flush the pending send queue.
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///
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pub fn write_pending(&mut self) -> Result<()> { |
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/// Ensures all messages previously passed to [`write`](Self::write) and automatic
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self.context.write_pending(&mut self.socket) |
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/// queued pong responses are written & flushed into the underlying stream.
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pub fn flush(&mut self) -> Result<()> { |
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self.context.flush(&mut self.socket) |
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} |
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} |
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/// Close the connection.
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/// Close the connection.
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///
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///
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/// This function guarantees that the close frame will be queued.
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/// This function guarantees that the close frame will be queued.
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/// There is no need to call it again. Calling this function is
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/// There is no need to call it again. Calling this function is
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/// the same as calling `write(Message::Close(..))`.
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/// the same as calling `write_message(Message::Close(..))`.
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///
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///
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/// After queuing the close frame you should continue calling [`read`](Self::read) or
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/// After queuing the close frame you should continue calling `read_message` or
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/// [`flush`](Self::flush) to drive the close handshake to completion.
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/// `write_pending` to drive the close handshake to completion.
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///
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///
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/// The websocket RFC defines that the underlying connection should be closed
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/// The websocket RFC defines that the underlying connection should be closed
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/// by the server. Tungstenite takes care of this asymmetry for you.
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/// by the server. Tungstenite takes care of this asymmetry for you.
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///
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///
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/// When the close handshake is finished (we have both sent and received
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/// When the close handshake is finished (we have both sent and received
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/// a close message), [`read`](Self::read) or [`flush`](Self::flush) will return
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/// a close message), `read_message` or `write_pending` will return
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/// [Error::ConnectionClosed] if this endpoint is the server.
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/// [Error::ConnectionClosed] if this endpoint is the server.
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///
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///
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/// If this endpoint is a client, [Error::ConnectionClosed] will only be
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/// If this endpoint is a client, [Error::ConnectionClosed] will only be
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/// returned after the server has closed the underlying connection.
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/// returned after the server has closed the underlying connection.
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///
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///
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/// It is thus safe to drop the underlying connection as soon as [Error::ConnectionClosed]
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/// It is thus safe to drop the underlying connection as soon as [Error::ConnectionClosed]
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/// is returned from [`read`](Self::read) or [`flush`](Self::flush).
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/// is returned from `read_message` or `write_pending`.
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pub fn close(&mut self, code: Option<CloseFrame>) -> Result<()> { |
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pub fn close(&mut self, code: Option<CloseFrame>) -> Result<()> { |
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self.context.close(&mut self.socket, code) |
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self.context.close(&mut self.socket, code) |
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} |
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} |
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/// Old name for [`read`](Self::read).
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#[deprecated(note = "Use `read`")] |
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pub fn read_message(&mut self) -> Result<Message> { |
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self.read() |
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} |
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/// Old name for [`send`](Self::send).
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#[deprecated(note = "Use `send`")] |
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pub fn write_message(&mut self, message: Message) -> Result<()> { |
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self.send(message) |
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} |
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/// Old name for [`flush`](Self::flush).
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#[deprecated(note = "Use `flush`")] |
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pub fn write_pending(&mut self) -> Result<()> { |
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self.flush() |
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} |
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} |
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} |
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/// A context for managing WebSocket stream.
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/// A context for managing WebSocket stream.
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@ -283,8 +235,10 @@ pub struct WebSocketContext { |
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state: WebSocketState, |
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state: WebSocketState, |
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/// Receive: an incomplete message being processed.
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/// Receive: an incomplete message being processed.
|
|
|
|
incomplete: Option<IncompleteMessage>, |
|
|
|
incomplete: Option<IncompleteMessage>, |
|
|
|
/// Send in addition to regular messages E.g. "pong" or "close".
|
|
|
|
/// Send: a data send queue.
|
|
|
|
additional_send: Option<Frame>, |
|
|
|
send_queue: VecDeque<Frame>, |
|
|
|
|
|
|
|
/// Send: an OOB pong message.
|
|
|
|
|
|
|
|
pong: Option<Frame>, |
|
|
|
/// The configuration for the websocket session.
|
|
|
|
/// The configuration for the websocket session.
|
|
|
|
config: WebSocketConfig, |
|
|
|
config: WebSocketConfig, |
|
|
|
} |
|
|
|
} |
|
|
|
@ -292,32 +246,28 @@ pub struct WebSocketContext { |
|
|
|
impl WebSocketContext { |
|
|
|
impl WebSocketContext { |
|
|
|
/// Create a WebSocket context that manages a post-handshake stream.
|
|
|
|
/// Create a WebSocket context that manages a post-handshake stream.
|
|
|
|
pub fn new(role: Role, config: Option<WebSocketConfig>) -> Self { |
|
|
|
pub fn new(role: Role, config: Option<WebSocketConfig>) -> Self { |
|
|
|
Self::_new(role, FrameCodec::new(), config.unwrap_or_default()) |
|
|
|
WebSocketContext { |
|
|
|
|
|
|
|
role, |
|
|
|
|
|
|
|
frame: FrameCodec::new(), |
|
|
|
|
|
|
|
state: WebSocketState::Active, |
|
|
|
|
|
|
|
incomplete: None, |
|
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|
|
|
|
|
send_queue: VecDeque::new(), |
|
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|
|
|
|
|
pong: None, |
|
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|
|
|
|
|
config: config.unwrap_or_default(), |
|
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|
|
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
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|
|
|
|
|
|
|
|
|
/// Create a WebSocket context that manages an post-handshake stream.
|
|
|
|
/// Create a WebSocket context that manages an post-handshake stream.
|
|
|
|
pub fn from_partially_read(part: Vec<u8>, role: Role, config: Option<WebSocketConfig>) -> Self { |
|
|
|
pub fn from_partially_read(part: Vec<u8>, role: Role, config: Option<WebSocketConfig>) -> Self { |
|
|
|
Self::_new(role, FrameCodec::from_partially_read(part), config.unwrap_or_default()) |
|
|
|
WebSocketContext { |
|
|
|
} |
|
|
|
frame: FrameCodec::from_partially_read(part), |
|
|
|
|
|
|
|
..WebSocketContext::new(role, config) |
|
|
|
fn _new(role: Role, mut frame: FrameCodec, config: WebSocketConfig) -> Self { |
|
|
|
|
|
|
|
frame.set_max_out_buffer_len(config.max_write_buffer_size); |
|
|
|
|
|
|
|
frame.set_out_buffer_write_len(config.write_buffer_size); |
|
|
|
|
|
|
|
Self { |
|
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|
|
|
|
|
role, |
|
|
|
|
|
|
|
frame, |
|
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|
|
|
|
|
state: WebSocketState::Active, |
|
|
|
|
|
|
|
incomplete: None, |
|
|
|
|
|
|
|
additional_send: None, |
|
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|
|
|
|
|
config, |
|
|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
/// Change the configuration.
|
|
|
|
/// Change the configuration.
|
|
|
|
pub fn set_config(&mut self, set_func: impl FnOnce(&mut WebSocketConfig)) { |
|
|
|
pub fn set_config(&mut self, set_func: impl FnOnce(&mut WebSocketConfig)) { |
|
|
|
set_func(&mut self.config); |
|
|
|
set_func(&mut self.config) |
|
|
|
self.frame.set_max_out_buffer_len(self.config.max_write_buffer_size); |
|
|
|
|
|
|
|
self.frame.set_out_buffer_write_len(self.config.write_buffer_size); |
|
|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
/// Read the configuration.
|
|
|
|
/// Read the configuration.
|
|
|
|
@ -344,23 +294,17 @@ impl WebSocketContext { |
|
|
|
///
|
|
|
|
///
|
|
|
|
/// This function sends pong and close responses automatically.
|
|
|
|
/// This function sends pong and close responses automatically.
|
|
|
|
/// However, it never blocks on write.
|
|
|
|
/// However, it never blocks on write.
|
|
|
|
pub fn read<Stream>(&mut self, stream: &mut Stream) -> Result<Message> |
|
|
|
pub fn read_message<Stream>(&mut self, stream: &mut Stream) -> Result<Message> |
|
|
|
where |
|
|
|
where |
|
|
|
Stream: Read + Write, |
|
|
|
Stream: Read + Write, |
|
|
|
{ |
|
|
|
{ |
|
|
|
// Do not read from already closed connections.
|
|
|
|
// Do not read from already closed connections.
|
|
|
|
self.state.check_not_terminated()?; |
|
|
|
self.state.check_active()?; |
|
|
|
|
|
|
|
|
|
|
|
loop { |
|
|
|
loop { |
|
|
|
if self.additional_send.is_some() { |
|
|
|
|
|
|
|
// Since we may get ping or close, we need to reply to the messages even during read.
|
|
|
|
// Since we may get ping or close, we need to reply to the messages even during read.
|
|
|
|
// Thus we flush but ignore its blocking.
|
|
|
|
// Thus we call write_pending() but ignore its blocking.
|
|
|
|
self.flush(stream).no_block()?; |
|
|
|
self.write_pending(stream).no_block()?; |
|
|
|
} else if self.role == Role::Server && !self.state.can_read() { |
|
|
|
|
|
|
|
self.state = WebSocketState::Terminated; |
|
|
|
|
|
|
|
return Err(Error::ConnectionClosed); |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// If we get here, either write blocks or we have nothing to write.
|
|
|
|
// If we get here, either write blocks or we have nothing to write.
|
|
|
|
// Thus if read blocks, just let it return WouldBlock.
|
|
|
|
// Thus if read blocks, just let it return WouldBlock.
|
|
|
|
if let Some(message) = self.read_message_frame(stream)? { |
|
|
|
if let Some(message) = self.read_message_frame(stream)? { |
|
|
|
@ -370,94 +314,78 @@ impl WebSocketContext { |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
/// Write a message to the provided stream.
|
|
|
|
/// Send a message to the provided stream, if possible.
|
|
|
|
///
|
|
|
|
|
|
|
|
/// A subsequent call should be made to [`flush`](Self::flush) to flush writes.
|
|
|
|
|
|
|
|
///
|
|
|
|
///
|
|
|
|
/// In the event of stream write failure the message frame will be stored
|
|
|
|
/// WebSocket will buffer a configurable number of messages at a time, except to reply to Ping
|
|
|
|
/// in the write buffer and will try again on the next call to [`write`](Self::write)
|
|
|
|
/// and Close requests. If the WebSocket's send queue is full, `SendQueueFull` will be returned
|
|
|
|
/// or [`flush`](Self::flush).
|
|
|
|
/// along with the passed message. Otherwise, the message is queued and Ok(()) is returned.
|
|
|
|
///
|
|
|
|
///
|
|
|
|
/// If the write buffer would exceed the configured [`WebSocketConfig::max_write_buffer_size`]
|
|
|
|
/// Note that only the last pong frame is stored to be sent, and only the
|
|
|
|
/// [`Err(WriteBufferFull(msg_frame))`](Error::WriteBufferFull) is returned.
|
|
|
|
/// most recent pong frame is sent if multiple pong frames are queued.
|
|
|
|
pub fn write<Stream>(&mut self, stream: &mut Stream, message: Message) -> Result<()> |
|
|
|
pub fn write_message<Stream>(&mut self, stream: &mut Stream, message: Message) -> Result<()> |
|
|
|
where |
|
|
|
where |
|
|
|
Stream: Read + Write, |
|
|
|
Stream: Read + Write, |
|
|
|
{ |
|
|
|
{ |
|
|
|
// When terminated, return AlreadyClosed.
|
|
|
|
// When terminated, return AlreadyClosed.
|
|
|
|
self.state.check_not_terminated()?; |
|
|
|
self.state.check_active()?; |
|
|
|
|
|
|
|
|
|
|
|
// Do not write after sending a close frame.
|
|
|
|
// Do not write after sending a close frame.
|
|
|
|
if !self.state.is_active() { |
|
|
|
if !self.state.is_active() { |
|
|
|
return Err(Error::Protocol(ProtocolError::SendAfterClosing)); |
|
|
|
return Err(Error::Protocol(ProtocolError::SendAfterClosing)); |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
if let Some(max_send_queue) = self.config.max_send_queue { |
|
|
|
|
|
|
|
if self.send_queue.len() >= max_send_queue { |
|
|
|
|
|
|
|
// Try to make some room for the new message.
|
|
|
|
|
|
|
|
// Do not return here if write would block, ignore WouldBlock silently
|
|
|
|
|
|
|
|
// since we must queue the message anyway.
|
|
|
|
|
|
|
|
self.write_pending(stream).no_block()?; |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
if self.send_queue.len() >= max_send_queue { |
|
|
|
|
|
|
|
return Err(Error::SendQueueFull(message)); |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
let frame = match message { |
|
|
|
let frame = match message { |
|
|
|
Message::Text(data) => Frame::message(data.into(), OpCode::Data(OpData::Text), true), |
|
|
|
Message::Text(data) => Frame::message(data.into(), OpCode::Data(OpData::Text), true), |
|
|
|
Message::Binary(data) => Frame::message(data, OpCode::Data(OpData::Binary), true), |
|
|
|
Message::Binary(data) => Frame::message(data, OpCode::Data(OpData::Binary), true), |
|
|
|
Message::Ping(data) => Frame::ping(data), |
|
|
|
Message::Ping(data) => Frame::ping(data), |
|
|
|
Message::Pong(data) => { |
|
|
|
Message::Pong(data) => { |
|
|
|
self.set_additional(Frame::pong(data)); |
|
|
|
self.pong = Some(Frame::pong(data)); |
|
|
|
// Note: user pongs can be user flushed so no need to flush here
|
|
|
|
return self.write_pending(stream); |
|
|
|
return self._write(stream, None).map(|_| ()); |
|
|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
Message::Close(code) => return self.close(stream, code), |
|
|
|
Message::Close(code) => return self.close(stream, code), |
|
|
|
Message::Frame(f) => f, |
|
|
|
Message::Frame(f) => f, |
|
|
|
}; |
|
|
|
}; |
|
|
|
|
|
|
|
|
|
|
|
let should_flush = self._write(stream, Some(frame))?; |
|
|
|
self.send_queue.push_back(frame); |
|
|
|
if should_flush { |
|
|
|
self.write_pending(stream) |
|
|
|
self.flush(stream)?; |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
Ok(()) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/// Flush writes.
|
|
|
|
|
|
|
|
///
|
|
|
|
|
|
|
|
/// Ensures all messages previously passed to [`write`](Self::write) and automatically
|
|
|
|
|
|
|
|
/// queued pong responses are written & flushed into the `stream`.
|
|
|
|
|
|
|
|
#[inline] |
|
|
|
|
|
|
|
pub fn flush<Stream>(&mut self, stream: &mut Stream) -> Result<()> |
|
|
|
|
|
|
|
where |
|
|
|
|
|
|
|
Stream: Read + Write, |
|
|
|
|
|
|
|
{ |
|
|
|
|
|
|
|
self._write(stream, None)?; |
|
|
|
|
|
|
|
self.frame.write_out_buffer(stream)?; |
|
|
|
|
|
|
|
Ok(stream.flush()?) |
|
|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
/// Writes any data in the out_buffer, `additional_send` and given `data`.
|
|
|
|
/// Flush the pending send queue.
|
|
|
|
///
|
|
|
|
pub fn write_pending<Stream>(&mut self, stream: &mut Stream) -> Result<()> |
|
|
|
/// Does **not** flush.
|
|
|
|
|
|
|
|
///
|
|
|
|
|
|
|
|
/// Returns true if the write contents indicate we should flush immediately.
|
|
|
|
|
|
|
|
fn _write<Stream>(&mut self, stream: &mut Stream, data: Option<Frame>) -> Result<bool> |
|
|
|
|
|
|
|
where |
|
|
|
where |
|
|
|
Stream: Read + Write, |
|
|
|
Stream: Read + Write, |
|
|
|
{ |
|
|
|
{ |
|
|
|
if let Some(data) = data { |
|
|
|
// First, make sure we have no pending frame sending.
|
|
|
|
self.buffer_frame(stream, data)?; |
|
|
|
self.frame.write_pending(stream)?; |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Upon receipt of a Ping frame, an endpoint MUST send a Pong frame in
|
|
|
|
// Upon receipt of a Ping frame, an endpoint MUST send a Pong frame in
|
|
|
|
// response, unless it already received a Close frame. It SHOULD
|
|
|
|
// response, unless it already received a Close frame. It SHOULD
|
|
|
|
// respond with Pong frame as soon as is practical. (RFC 6455)
|
|
|
|
// respond with Pong frame as soon as is practical. (RFC 6455)
|
|
|
|
let should_flush = if let Some(msg) = self.additional_send.take() { |
|
|
|
if let Some(pong) = self.pong.take() { |
|
|
|
trace!("Sending pong/close"); |
|
|
|
trace!("Sending pong reply"); |
|
|
|
match self.buffer_frame(stream, msg) { |
|
|
|
self.send_one_frame(stream, pong)?; |
|
|
|
Err(Error::WriteBufferFull(Message::Frame(msg))) => { |
|
|
|
} |
|
|
|
// if an system message would exceed the buffer put it back in
|
|
|
|
// If we have any unsent frames, send them.
|
|
|
|
// `additional_send` for retry. Otherwise returning this error
|
|
|
|
trace!("Frames still in queue: {}", self.send_queue.len()); |
|
|
|
// may not make sense to the user, e.g. calling `flush`.
|
|
|
|
while let Some(data) = self.send_queue.pop_front() { |
|
|
|
self.set_additional(msg); |
|
|
|
self.send_one_frame(stream, data)?; |
|
|
|
false |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
Err(err) => return Err(err), |
|
|
|
|
|
|
|
Ok(_) => true, |
|
|
|
|
|
|
|
} |
|
|
|
} |
|
|
|
} else { |
|
|
|
|
|
|
|
false |
|
|
|
// If we get to this point, the send queue is empty and the underlying socket is still
|
|
|
|
}; |
|
|
|
// willing to take more data.
|
|
|
|
|
|
|
|
|
|
|
|
// If we're closing and there is nothing to send anymore, we should close the connection.
|
|
|
|
// If we're closing and there is nothing to send anymore, we should close the connection.
|
|
|
|
if self.role == Role::Server && !self.state.can_read() { |
|
|
|
if self.role == Role::Server && !self.state.can_read() { |
|
|
|
@ -467,11 +395,10 @@ impl WebSocketContext { |
|
|
|
// maximum segment lifetimes (2MSL), while there is no corresponding
|
|
|
|
// maximum segment lifetimes (2MSL), while there is no corresponding
|
|
|
|
// server impact as a TIME_WAIT connection is immediately reopened upon
|
|
|
|
// server impact as a TIME_WAIT connection is immediately reopened upon
|
|
|
|
// a new SYN with a higher seq number). (RFC 6455)
|
|
|
|
// a new SYN with a higher seq number). (RFC 6455)
|
|
|
|
self.frame.write_out_buffer(stream)?; |
|
|
|
|
|
|
|
self.state = WebSocketState::Terminated; |
|
|
|
self.state = WebSocketState::Terminated; |
|
|
|
Err(Error::ConnectionClosed) |
|
|
|
Err(Error::ConnectionClosed) |
|
|
|
} else { |
|
|
|
} else { |
|
|
|
Ok(should_flush) |
|
|
|
Ok(()) |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
@ -479,7 +406,7 @@ impl WebSocketContext { |
|
|
|
///
|
|
|
|
///
|
|
|
|
/// This function guarantees that the close frame will be queued.
|
|
|
|
/// This function guarantees that the close frame will be queued.
|
|
|
|
/// There is no need to call it again. Calling this function is
|
|
|
|
/// There is no need to call it again. Calling this function is
|
|
|
|
/// the same as calling `send(Message::Close(..))`.
|
|
|
|
/// the same as calling `write(Message::Close(..))`.
|
|
|
|
pub fn close<Stream>(&mut self, stream: &mut Stream, code: Option<CloseFrame>) -> Result<()> |
|
|
|
pub fn close<Stream>(&mut self, stream: &mut Stream, code: Option<CloseFrame>) -> Result<()> |
|
|
|
where |
|
|
|
where |
|
|
|
Stream: Read + Write, |
|
|
|
Stream: Read + Write, |
|
|
|
@ -487,9 +414,11 @@ impl WebSocketContext { |
|
|
|
if let WebSocketState::Active = self.state { |
|
|
|
if let WebSocketState::Active = self.state { |
|
|
|
self.state = WebSocketState::ClosedByUs; |
|
|
|
self.state = WebSocketState::ClosedByUs; |
|
|
|
let frame = Frame::close(code); |
|
|
|
let frame = Frame::close(code); |
|
|
|
self._write(stream, Some(frame))?; |
|
|
|
self.send_queue.push_back(frame); |
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} else { |
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// Already closed, nothing to do.
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} |
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} |
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self.flush(stream) |
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self.write_pending(stream) |
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} |
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} |
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/// Try to decode one message frame. May return None.
|
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/// Try to decode one message frame. May return None.
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|
@ -558,7 +487,7 @@ impl WebSocketContext { |
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let data = frame.into_data(); |
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let data = frame.into_data(); |
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// No ping processing after we sent a close frame.
|
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|
// No ping processing after we sent a close frame.
|
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|
if self.state.is_active() { |
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|
if self.state.is_active() { |
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|
self.set_additional(Frame::pong(data.clone())); |
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|
self.pong = Some(Frame::pong(data.clone())); |
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|
} |
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} |
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Ok(Some(Message::Ping(data))) |
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Ok(Some(Message::Ping(data))) |
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|
} |
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} |
|
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@ -642,7 +571,7 @@ impl WebSocketContext { |
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let reply = Frame::close(close.clone()); |
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let reply = Frame::close(close.clone()); |
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|
debug!("Replying to close with {:?}", reply); |
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|
debug!("Replying to close with {:?}", reply); |
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|
self.set_additional(reply); |
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|
self.send_queue.push_back(reply); |
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Some(close) |
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Some(close) |
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} |
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} |
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@ -659,8 +588,8 @@ impl WebSocketContext { |
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} |
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} |
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} |
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} |
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/// Write a single frame into the write-buffer.
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|
/// Send a single pending frame.
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|
fn buffer_frame<Stream>(&mut self, stream: &mut Stream, mut frame: Frame) -> Result<()> |
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|
fn send_one_frame<Stream>(&mut self, stream: &mut Stream, mut frame: Frame) -> Result<()> |
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|
where |
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|
where |
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|
Stream: Read + Write, |
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|
Stream: Read + Write, |
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{ |
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{ |
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@ -674,18 +603,7 @@ impl WebSocketContext { |
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} |
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} |
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|
trace!("Sending frame: {:?}", frame); |
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|
trace!("Sending frame: {:?}", frame); |
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|
self.frame.buffer_frame(stream, frame).check_connection_reset(self.state) |
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|
self.frame.write_frame(stream, frame).check_connection_reset(self.state) |
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|
} |
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|
/// Replace `additional_send` if it is currently a `Pong` message.
|
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|
fn set_additional(&mut self, add: Frame) { |
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|
let empty_or_pong = self |
|
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|
.additional_send |
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|
.as_ref() |
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|
.map_or(true, |f| f.header().opcode == OpCode::Control(OpCtl::Pong)); |
|
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|
|
|
if empty_or_pong { |
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|
|
self.additional_send.replace(add); |
|
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|
|
|
|
} |
|
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|
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
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|
|
|
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|
|
@ -718,7 +636,7 @@ impl WebSocketState { |
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|
|
} |
|
|
|
} |
|
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|
|
|
|
|
|
|
|
/// Check if the state is active, return error if not.
|
|
|
|
/// Check if the state is active, return error if not.
|
|
|
|
fn check_not_terminated(self) -> Result<()> { |
|
|
|
fn check_active(self) -> Result<()> { |
|
|
|
match self { |
|
|
|
match self { |
|
|
|
WebSocketState::Terminated => Err(Error::AlreadyClosed), |
|
|
|
WebSocketState::Terminated => Err(Error::AlreadyClosed), |
|
|
|
_ => Ok(()), |
|
|
|
_ => Ok(()), |
|
|
|
@ -770,6 +688,64 @@ mod tests { |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
struct WouldBlockStreamMoc; |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
impl io::Write for WouldBlockStreamMoc { |
|
|
|
|
|
|
|
fn write(&mut self, _: &[u8]) -> io::Result<usize> { |
|
|
|
|
|
|
|
Err(io::Error::new(io::ErrorKind::WouldBlock, "would block")) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
fn flush(&mut self) -> io::Result<()> { |
|
|
|
|
|
|
|
Err(io::Error::new(io::ErrorKind::WouldBlock, "would block")) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
impl io::Read for WouldBlockStreamMoc { |
|
|
|
|
|
|
|
fn read(&mut self, _: &mut [u8]) -> io::Result<usize> { |
|
|
|
|
|
|
|
Err(io::Error::new(io::ErrorKind::WouldBlock, "would block")) |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#[test] |
|
|
|
|
|
|
|
fn queue_logic() { |
|
|
|
|
|
|
|
// Create a socket with the queue size of 1.
|
|
|
|
|
|
|
|
let mut socket = WebSocket::from_raw_socket( |
|
|
|
|
|
|
|
WouldBlockStreamMoc, |
|
|
|
|
|
|
|
Role::Client, |
|
|
|
|
|
|
|
Some(WebSocketConfig { max_send_queue: Some(1), ..Default::default() }), |
|
|
|
|
|
|
|
); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Test message that we're going to send.
|
|
|
|
|
|
|
|
let message = Message::Binary(vec![0xFF; 1024]); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Helper to check the error.
|
|
|
|
|
|
|
|
let assert_would_block = |error| { |
|
|
|
|
|
|
|
if let Error::Io(io_error) = error { |
|
|
|
|
|
|
|
assert_eq!(io_error.kind(), io::ErrorKind::WouldBlock); |
|
|
|
|
|
|
|
} else { |
|
|
|
|
|
|
|
panic!("Expected WouldBlock error"); |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
}; |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// The first attempt of writing must not fail, since the queue is empty at start.
|
|
|
|
|
|
|
|
// But since the underlying mock object always returns `WouldBlock`, so is the result.
|
|
|
|
|
|
|
|
assert_would_block(dbg!(socket.write_message(message.clone()).unwrap_err())); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Any subsequent attempts must return an error telling that the queue is full.
|
|
|
|
|
|
|
|
for _i in 0..100 { |
|
|
|
|
|
|
|
assert!(matches!( |
|
|
|
|
|
|
|
socket.write_message(message.clone()).unwrap_err(), |
|
|
|
|
|
|
|
Error::SendQueueFull(..) |
|
|
|
|
|
|
|
)); |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// The size of the output buffer must not be bigger than the size of that message
|
|
|
|
|
|
|
|
// that we managed to write to the output buffer at first. Since we could not make
|
|
|
|
|
|
|
|
// any progress (because of the logic of the moc buffer), the size remains unchanged.
|
|
|
|
|
|
|
|
if socket.context.frame.output_buffer_len() > message.len() { |
|
|
|
|
|
|
|
panic!("Too many frames in the queue"); |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
#[test] |
|
|
|
#[test] |
|
|
|
fn receive_messages() { |
|
|
|
fn receive_messages() { |
|
|
|
let incoming = Cursor::new(vec![ |
|
|
|
let incoming = Cursor::new(vec![ |
|
|
|
@ -778,10 +754,10 @@ mod tests { |
|
|
|
0x03, |
|
|
|
0x03, |
|
|
|
]); |
|
|
|
]); |
|
|
|
let mut socket = WebSocket::from_raw_socket(WriteMoc(incoming), Role::Client, None); |
|
|
|
let mut socket = WebSocket::from_raw_socket(WriteMoc(incoming), Role::Client, None); |
|
|
|
assert_eq!(socket.read().unwrap(), Message::Ping(vec![1, 2])); |
|
|
|
assert_eq!(socket.read_message().unwrap(), Message::Ping(vec![1, 2])); |
|
|
|
assert_eq!(socket.read().unwrap(), Message::Pong(vec![3])); |
|
|
|
assert_eq!(socket.read_message().unwrap(), Message::Pong(vec![3])); |
|
|
|
assert_eq!(socket.read().unwrap(), Message::Text("Hello, World!".into())); |
|
|
|
assert_eq!(socket.read_message().unwrap(), Message::Text("Hello, World!".into())); |
|
|
|
assert_eq!(socket.read().unwrap(), Message::Binary(vec![0x01, 0x02, 0x03])); |
|
|
|
assert_eq!(socket.read_message().unwrap(), Message::Binary(vec![0x01, 0x02, 0x03])); |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
#[test] |
|
|
|
#[test] |
|
|
|
@ -794,7 +770,7 @@ mod tests { |
|
|
|
let mut socket = WebSocket::from_raw_socket(WriteMoc(incoming), Role::Client, Some(limit)); |
|
|
|
let mut socket = WebSocket::from_raw_socket(WriteMoc(incoming), Role::Client, Some(limit)); |
|
|
|
|
|
|
|
|
|
|
|
assert!(matches!( |
|
|
|
assert!(matches!( |
|
|
|
socket.read(), |
|
|
|
socket.read_message(), |
|
|
|
Err(Error::Capacity(CapacityError::MessageTooLong { size: 13, max_size: 10 })) |
|
|
|
Err(Error::Capacity(CapacityError::MessageTooLong { size: 13, max_size: 10 })) |
|
|
|
)); |
|
|
|
)); |
|
|
|
} |
|
|
|
} |
|
|
|
@ -806,7 +782,7 @@ mod tests { |
|
|
|
let mut socket = WebSocket::from_raw_socket(WriteMoc(incoming), Role::Client, Some(limit)); |
|
|
|
let mut socket = WebSocket::from_raw_socket(WriteMoc(incoming), Role::Client, Some(limit)); |
|
|
|
|
|
|
|
|
|
|
|
assert!(matches!( |
|
|
|
assert!(matches!( |
|
|
|
socket.read(), |
|
|
|
socket.read_message(), |
|
|
|
Err(Error::Capacity(CapacityError::MessageTooLong { size: 3, max_size: 2 })) |
|
|
|
Err(Error::Capacity(CapacityError::MessageTooLong { size: 3, max_size: 2 })) |
|
|
|
)); |
|
|
|
)); |
|
|
|
} |
|
|
|
} |
|
|
|
|
Niko PLP