Added a web version of the PAD

.gitignore

@@ -1 +1,8 @@
 /target
+
+# WASM build artifacts (generated by docker-compose)
+/www/pkg/
+
+# Backup files
+*.old
+*.orig

Caddyfile

@@ -0,0 +1,13 @@
+:8080 {
+    # Serve static files
+    root * /app/www
+    file_server
+
+    # Reverse proxy WebSocket to websockify
+    reverse_proxy /ws/* websockify:8081
+
+    # Disable caching for development
+    header {
+        Cache-Control "no-cache"
+    }
+}

Cargo.toml

@@ -4,16 +4,31 @@ version = "0.0.0"
 edition = "2021"
 
 [features]
-default = ["x25_org"]
+default = ["x25_org", "native"]
 x25_org = []
+native = ["clap", "crossterm"]
+wasm = []
+
+[lib]
+crate-type = ["cdylib", "rlib"]
 
 [workspace]
 
 [dependencies]
 bytes = "1.6.0"
 chrono = "0.4.38"
-clap = { version = "4.5.4", default-features = false, features = ["std", "derive", "usage", "help", "error-context"] }
-crossterm = "0.27.0"
 tracing-mutex = "0.3.0"
 
 libxotpad = { path = "libxotpad" }
+
+# Native dependencies
+clap = { version = "4.5.4", default-features = false, features = ["std", "derive", "usage", "help", "error-context"], optional = true }
+crossterm = { version = "0.27.0", optional = true }
+
+# WASM dependencies
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+wasm-bindgen = "0.2"
+wasm-bindgen-futures = "0.4"
+js-sys = "0.3"
+web-sys = { version = "0.3", features = ["WebSocket", "MessageEvent", "BinaryType", "ErrorEvent", "CloseEvent", "console", "Window", "Location"] }
+console_error_panic_hook = "0.1"

Dockerfile.wasm

@@ -0,0 +1,35 @@
+# Build WASM module only
+FROM rust:1.75-slim
+
+# Install wasm-pack and dependencies
+RUN apt-get update && apt-get install -y \
+    curl \
+    pkg-config \
+    libssl-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+# Add wasm target
+RUN rustup target add wasm32-unknown-unknown
+
+# Set working directory
+WORKDIR /build
+
+# Copy source files
+COPY Cargo.toml Cargo.lock ./
+COPY src/ ./src/
+COPY libxotpad/ ./libxotpad/
+COPY build-wasm.sh ./
+
+# Build WASM module with x25.org DNS support
+RUN chmod +x build-wasm.sh && \
+    wasm-pack build \
+        --target web \
+        --out-dir www/pkg \
+        --no-typescript \
+        --features wasm,x25_org \
+        --no-default-features
+
+# Output will be in /build/www/pkg/
+CMD ["sh", "-c", "cp -r /build/www/pkg/* /output/"]

Dockerfile.websockify

@@ -0,0 +1,16 @@
+FROM python:3.11-slim
+
+# Install websockify
+RUN pip3 install --no-cache-dir websockify
+
+# Create app directory
+WORKDIR /app
+
+# Copy token plugin and websockify wrapper
+COPY token_plugin.py websockify_wrapper.py ./
+
+# Expose websockify port
+EXPOSE 8081
+
+# Run via wrapper that adds pong timeout detection
+CMD ["python3", "websockify_wrapper.py", "--heartbeat=10", "--token-plugin=token_plugin.TokenPlugin", "0.0.0.0:8081"]

build-wasm.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Build script for xotpad WASM target
+
+set -e
+
+echo "Building xotpad for WebAssembly..."
+
+# Check if wasm-pack is installed
+if ! command -v wasm-pack &> /dev/null; then
+    echo "Error: wasm-pack is not installed"
+    echo "Install it with: cargo install wasm-pack"
+    exit 1
+fi
+
+# Build the WASM module with x25.org DNS support
+wasm-pack build \
+    --target web \
+    --out-dir www/pkg \
+    --no-typescript \
+    --features wasm,x25_org \
+    --no-default-features
+
+echo "✓ WASM build complete!"
+echo ""
+echo "Output directory: www/pkg/"
+echo ""
+echo "To test locally, run a web server in the www/ directory:"
+echo "  cd www && python3 -m http.server 8080"
+echo ""
+echo "Note: You'll also need a websockify server to relay TCP connections."
+echo "See www/WASM_SETUP.md for detailed instructions."

docker-compose.yml

@@ -0,0 +1,60 @@
+services:
+  # Build WASM module (runs automatically before caddy starts)
+  wasm-builder:
+    build:
+      context: .
+      dockerfile: Dockerfile.wasm
+    volumes:
+      - ./www/pkg:/output
+    command: sh -c "cp -r /build/www/pkg/* /output/"
+    # Exit after copying files
+    restart: "no"
+
+  # Caddy web server serving static files and proxying WebSocket
+  caddy:
+    image: caddy:2-alpine
+    restart: unless-stopped
+    container_name: xotpad-caddy
+    ports:
+      - "8080:8080"
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile:ro
+      - ./www:/app/www:ro
+      - caddy_data:/data
+      - caddy_config:/config
+    environment:
+      - TZ=UTC
+    depends_on:
+      wasm-builder:
+        condition: service_completed_successfully
+      websockify:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:8080/"]
+      interval: 30s
+      timeout: 3s
+      retries: 3
+      start_period: 5s
+
+  # Websockify for WebSocket to TCP relay
+  websockify:
+    build:
+      context: .
+      dockerfile: Dockerfile.websockify
+    restart: unless-stopped
+    container_name: xotpad-websockify
+    environment:
+      - TZ=UTC
+      - PYTHONPATH=/app
+    expose:
+      - "8081"
+    healthcheck:
+      test: ["CMD", "python3", "-c", "import socket; s=socket.socket(); s.connect(('127.0.0.1', 8081)); s.close()"]
+      interval: 30s
+      timeout: 3s
+      retries: 3
+      start_period: 5s
+
+volumes:
+  caddy_data:
+  caddy_config:

libxotpad/Cargo.toml

@@ -3,8 +3,18 @@ name = "libxotpad"
 version = "0.0.0"
 edition = "2021"
 
+[features]
+default = []
+
 [dependencies]
 bytes = "1.6.0"
 either = "1.10.0"
 regex = "1.10.4"
 tracing-mutex = "0.3.0"
+
+# WASM dependencies
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+wasm-bindgen = "0.2"
+wasm-bindgen-futures = "0.4"
+js-sys = "0.3"
+web-sys = { version = "0.3", features = ["WebSocket", "MessageEvent", "BinaryType", "ErrorEvent", "CloseEvent", "Window", "Location"] }

libxotpad/src/lib.rs

@@ -1,6 +1,11 @@
+#[cfg(not(target_arch = "wasm32"))]
 pub mod pad;
+pub mod stream;
 pub mod x121;
 pub mod x25;
 pub mod x29;
 pub mod x3;
 pub mod xot;
+
+#[cfg(target_arch = "wasm32")]
+pub mod wasm_async;

libxotpad/src/pad.rs

@@ -14,7 +14,7 @@ use crate::x121::X121Addr;
 use crate::x25::{Svc, Vc, X25Params};
 use crate::x29::{X29CallUserData, X29PadMessage};
 use crate::x3::{X3Echo, X3Editing, X3Forward, X3Idle, X3LfInsert, X3ParamError, X3Params};
-use crate::xot::XotLink;
+use crate::xot::PlatformXotLink;
 
 type SendQueue = (VecDeque<u8>, Option<Instant>);
 type IndicateMessage = Vec<(u8, Result<u8, X3ParamError>)>;
@@ -199,7 +199,7 @@ impl<Q: X3Params + Send + Sync + 'static> Pad<Q> {
     }
 
     pub fn call(
-        link: XotLink,
+        link: PlatformXotLink,
         channel: u16,
         addr: &X121Addr,
         call_data: &[u8],