wacore 0.6.0

Core WhatsApp protocol implementation without runtime dependencies
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

use anyhow::Result;
use async_trait::async_trait;
use bytes::Bytes;
use std::collections::HashMap;
use std::sync::Arc;

/// Default WhatsApp Web websocket endpoint.
pub const WHATSAPP_WEB_WS_URL: &str = "wss://web.whatsapp.com/ws/chat";

/// An event produced by the transport layer.
#[derive(Debug, Clone)]
pub enum TransportEvent {
    /// The transport has successfully connected.
    Connected,
    /// Raw data has been received from the server.
    DataReceived(Bytes),
    /// The connection was lost.
    Disconnected,
}

/// Represents an active network connection.
/// The transport is a dumb pipe for bytes with no knowledge of WhatsApp framing.
#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
pub trait Transport: Send + Sync {
    /// Sends raw data to the server.
    async fn send(&self, data: Bytes) -> Result<(), anyhow::Error>;

    /// Closes the connection.
    async fn disconnect(&self);
}

/// A factory responsible for creating new transport instances.
#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
pub trait TransportFactory: Send + Sync {
    /// Creates a new transport and returns it, along with a stream of events.
    async fn create_transport(
        &self,
    ) -> Result<(Arc<dyn Transport>, async_channel::Receiver<TransportEvent>), anyhow::Error>;
}

/// A simple structure to represent an HTTP request
#[derive(Debug, Clone)]
pub struct HttpRequest {
    pub url: String,
    pub method: String, // "GET" or "POST"
    pub headers: HashMap<String, String>,
    pub body: Option<Vec<u8>>,
}

impl HttpRequest {
    pub fn get(url: impl Into<String>) -> Self {
        Self {
            url: url.into(),
            method: "GET".to_string(),
            headers: HashMap::new(),
            body: None,
        }
    }

    pub fn post(url: impl Into<String>) -> Self {
        Self {
            url: url.into(),
            method: "POST".to_string(),
            headers: HashMap::new(),
            body: None,
        }
    }

    pub fn with_header(mut self, key: impl Into<String>, value: impl Into<String>) -> Self {
        self.headers.insert(key.into(), value.into());
        self
    }

    pub fn with_body(mut self, body: Vec<u8>) -> Self {
        self.body = Some(body);
        self
    }
}

/// A simple structure for the HTTP response
#[derive(Debug, Clone)]
pub struct HttpResponse {
    pub status_code: u16,
    pub body: Vec<u8>,
}

impl HttpResponse {
    pub fn body_string(&self) -> Result<String> {
        Ok(String::from_utf8(self.body.clone())?)
    }
}

/// An HTTP response with a streaming body reader instead of a buffered `Vec<u8>`.
/// Used for large downloads where buffering the entire response would be wasteful.
pub struct StreamingHttpResponse {
    pub status_code: u16,
    pub body: Box<dyn std::io::Read + Send>,
}

/// Trait for executing HTTP requests in a runtime-agnostic way
#[cfg_attr(target_arch = "wasm32", async_trait(?Send))]
#[cfg_attr(not(target_arch = "wasm32"), async_trait)]
pub trait HttpClient: Send + Sync {
    /// Executes a given HTTP request and returns the response.
    async fn execute(&self, request: HttpRequest) -> Result<HttpResponse>;

    /// Whether this client supports synchronous streaming downloads.
    fn supports_streaming(&self) -> bool {
        false
    }

    /// Synchronous streaming variant — returns a reader over the response body.
    /// Must be called from a blocking context.
    fn execute_streaming(&self, _request: HttpRequest) -> Result<StreamingHttpResponse> {
        Err(anyhow::anyhow!(
            "Streaming not supported by this HTTP client"
        ))
    }
}