ws-tool 0.4.1

an easy to use websocket tool
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157

use std::io::{Read, Write};

use bytes::{Buf, BytesMut};

use crate::{
    codec::{
        FrameConfig, FrameReadState, FrameWriteState, Split, WsFrameCodec, WsFrameRecv, WsFrameSend,
    },
    errors::WsError,
    frame::OpCode,
    protocol::standard_handshake_resp_check,
    Message,
};

macro_rules! impl_recv {
    () => {
        /// receive a message
        pub fn receive(&mut self) -> Result<Message<BytesMut>, WsError> {
            let frame = self.frame_codec.receive()?;
            let header = frame.header();
            let header_len = header.payload_idx().0;
            let op_code = header.opcode();
            let mut data = frame.0;
            data.advance(header_len);
            let close_code = if op_code == OpCode::Close {
                Some(data.get_u16())
            } else {
                None
            };
            Ok(Message {
                code: op_code,
                data,
                close_code,
            })
        }
    };
}

macro_rules! impl_send {
    () => {
        /// send a message
        pub fn send<'a, T: Into<Message<&'a mut [u8]>>>(&mut self, msg: T) -> Result<(), WsError> {
            let msg: Message<&'a mut [u8]> = msg.into();
            if let Some(close_code) = msg.close_code {
                if msg.code == OpCode::Close {
                    self.frame_codec.send_mut(
                        msg.code,
                        vec![&mut close_code.to_be_bytes()[..], msg.data],
                        true,
                    )
                } else {
                    self.frame_codec.send_mut(msg.code, msg.data, true)
                }
            } else {
                self.frame_codec.send_mut(msg.code, msg.data, true)
            }
        }
    };
}

/// recv part of bytes message
pub struct WsBytesRecv<S: Read> {
    frame_codec: WsFrameRecv<S>,
}

impl<S: Read> WsBytesRecv<S> {
    /// construct method
    pub fn new(stream: S, state: FrameReadState) -> Self {
        Self {
            frame_codec: WsFrameRecv::new(stream, state),
        }
    }

    impl_recv! {}
}

/// send part of bytes message
pub struct WsBytesSend<S: Write> {
    frame_codec: WsFrameSend<S>,
}

impl<S: Write> WsBytesSend<S> {
    /// construct method
    pub fn new(stream: S, state: FrameWriteState) -> Self {
        Self {
            frame_codec: WsFrameSend::new(stream, state),
        }
    }

    impl_send! {}
}

/// recv/send bytes message
pub struct WsBytesCodec<S: Read + Write> {
    frame_codec: WsFrameCodec<S>,
}

impl<S: Read + Write> WsBytesCodec<S> {
    /// construct method
    pub fn new(stream: S) -> Self {
        Self {
            frame_codec: WsFrameCodec::new(stream),
        }
    }

    /// construct with stream & config
    pub fn new_with(stream: S, config: FrameConfig) -> Self {
        Self {
            frame_codec: WsFrameCodec::new_with(stream, config),
        }
    }

    /// used for server side to construct a new server
    pub fn factory(_req: http::Request<()>, stream: S) -> Result<Self, WsError> {
        let config = FrameConfig {
            mask_send_frame: false,
            ..Default::default()
        };
        Ok(Self::new_with(stream, config))
    }

    /// used to client side to construct a new client
    pub fn check_fn(key: String, resp: http::Response<()>, stream: S) -> Result<Self, WsError> {
        standard_handshake_resp_check(key.as_bytes(), &resp)?;
        Ok(Self::new_with(stream, FrameConfig::default()))
    }

    /// get mutable underlying stream
    pub fn stream_mut(&mut self) -> &mut S {
        self.frame_codec.stream_mut()
    }

    impl_recv! {}

    impl_send! {}
}

impl<R, W, S> WsBytesCodec<S>
where
    R: Read,
    W: Write,
    S: Read + Write + Split<R = R, W = W>,
{
    /// split codec to recv and send parts
    pub fn split(self) -> (WsBytesRecv<R>, WsBytesSend<W>) {
        let WsFrameCodec {
            stream,
            read_state,
            write_state,
        } = self.frame_codec;
        let (read, write) = stream.split();
        (
            WsBytesRecv::new(read, read_state),
            WsBytesSend::new(write, write_state),
        )
    }
}