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feat(websocket): add WebSocket Helper with RFC 6455 compliance

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Add comprehensive WebSocket support for v-hono framework, inspired by Hono.js WebSocket Helper.

Features:
- upgrade_websocket() function for WebSocket route handlers
- Event-based callbacks: on_open, on_message, on_close, on_error
- WSContext with send(), send_bytes(), send_json(), close() methods
- Connection state tracking (connecting, open, closing, closed)
- Configurable options: ping_interval, max_message_size, timeout, protocols
- Subprotocol negotiation support
- Ping/pong keep-alive handling
- Message size validation with 1009 close code
- Integration with picoev and uSockets backends

Protocol Compliance:
- RFC 6455 compliant handshake with Sec-WebSocket-Accept computation
- Frame encoding/decoding with proper masking
- Close handshake with status codes and reasons
- Text and binary message frame support

Testing:
- 13 property-based test files with 82 tests total
- Validates handshake, frame encoding, masking, JSON round-trip
- Tests context preservation, route patterns, connection state
- All existing tests pass (no regressions)

Files added:
- websocket.v: Core WebSocket implementation
- examples/websocket_demo.v: Chat room example
- examples/websocket_test.html: Browser test client
- tests/test_websocket_*.v: Property-based tests

Files modified:
- app.v: Add ws() method for WebSocket routes
- middleware.v: Export WebSocket types and functions
- picoev_server.v: WebSocket upgrade detection
- usockets_server.v: WebSocket upgrade detection
- README.md: WebSocket documentation
This commit is contained in:
meiseayoung
2026-01-04 13:38:12 +08:00
parent 4e2c6a90c3
commit 6ab6d3b99e
22 changed files with 8545 additions and 4 deletions
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tests/test_websocket_lifecycle_integration.v
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// test_websocket_lifecycle_integration.v - Integration test for WebSocket full connection lifecycle
// Feature: websocket-helper, Property 4: Event Callback Invocation
// Validates: Requirements 2.1, 2.2, 2.3, 2.4, 2.5
//
// *For any* WebSocket connection lifecycle, the event callbacks SHALL be invoked in the
// correct order: `on_open` (once on connection), `on_message` (for each message), and
// `on_close` (once on disconnection), with each callback receiving a valid WSContext.
module main
import rand
import time
import net.http
const test_iterations = 100
// WebSocket magic GUID for handshake (RFC 6455)
const ws_magic_guid = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'
// WebSocket opcodes
const ws_opcode_text = u8(0x1)
const ws_opcode_binary = u8(0x2)
const ws_opcode_close = u8(0x8)
const ws_opcode_ping = u8(0x9)
const ws_opcode_pong = u8(0xA)
// WebSocket close codes
const ws_close_normal = 1000
struct PropertyTestStats {
mut:
total_tests int
passed_tests int
failed_tests int
}
fn (mut stats PropertyTestStats) run_property_test(test_name string, test_func fn () bool) {
stats.total_tests++
print('🔬 ${test_name}... ')
if test_func() {
stats.passed_tests++
println('✅')
} else {
stats.failed_tests++
println('❌')
}
}
fn (stats PropertyTestStats) print_summary() {
println('\n=== WebSocket Lifecycle Integration Test Summary ===')
println('Total tests: ${stats.total_tests}')
println('Passed: ${stats.passed_tests}')
println('Failed: ${stats.failed_tests}')
if stats.failed_tests == 0 {
println('🎉 All property tests passed!')
} else {
println('⚠️ ${stats.failed_tests} property test(s) failed')
}
}
// ============================================================================
// Minimal type definitions for testing
// ============================================================================
enum WSReadyState {
connecting = 0
open = 1
closing = 2
closed = 3
}
struct WSMessageEvent {
pub:
data string
data_bytes []u8
is_binary bool
}
struct WSCloseEvent {
pub:
code int
reason string
was_clean bool
}
@[heap]
struct Context {
pub:
req http.Request
params map[string]string
query map[string]string
url string
path string
pub mut:
status_code int = 200
headers map[string]string
body string
store map[string]string
}
struct WSContext {
pub:
http_ctx &Context
params map[string]string
query map[string]string
store map[string]string
pub mut:
ready_state WSReadyState
protocol string
socket voidptr
send_fn fn ([]u8) ! = unsafe { nil }
close_fn fn (int, string) ! = unsafe { nil }
}
fn (ws WSContext) is_open() bool {
return ws.ready_state == .open
}
fn (ws WSContext) can_send() bool {
return ws.ready_state == .open
}
// ============================================================================
// Event Tracking for Testing
// ============================================================================
enum EventType {
on_open
on_message
on_close
on_error
}
struct EventRecord {
event_type EventType
timestamp i64
message_data string
is_binary bool
close_code int
close_reason string
error_message string
ws_valid bool // Whether WSContext was valid when callback was invoked
}
// EventTracker - Tracks all events during a WebSocket lifecycle
struct EventTracker {
mut:
events []EventRecord
}
fn (mut tracker EventTracker) record_open(ws WSContext) {
tracker.events << EventRecord{
event_type: .on_open
timestamp: time.now().unix_milli()
ws_valid: ws.http_ctx != unsafe { nil }
}
}
fn (mut tracker EventTracker) record_message(event WSMessageEvent, ws WSContext) {
tracker.events << EventRecord{
event_type: .on_message
timestamp: time.now().unix_milli()
message_data: event.data
is_binary: event.is_binary
ws_valid: ws.http_ctx != unsafe { nil }
}
}
fn (mut tracker EventTracker) record_close(event WSCloseEvent, ws WSContext) {
tracker.events << EventRecord{
event_type: .on_close
timestamp: time.now().unix_milli()
close_code: event.code
close_reason: event.reason
ws_valid: ws.http_ctx != unsafe { nil }
}
}
fn (mut tracker EventTracker) record_error(error_msg string, ws WSContext) {
tracker.events << EventRecord{
event_type: .on_error
timestamp: time.now().unix_milli()
error_message: error_msg
ws_valid: ws.http_ctx != unsafe { nil }
}
}
fn (tracker EventTracker) get_event_sequence() []EventType {
mut sequence := []EventType{}
for event in tracker.events {
sequence << event.event_type
}
return sequence
}
fn (tracker EventTracker) count_events(event_type EventType) int {
mut count := 0
for event in tracker.events {
if event.event_type == event_type {
count++
}
}
return count
}
fn (tracker EventTracker) all_ws_contexts_valid() bool {
for event in tracker.events {
if !event.ws_valid {
return false
}
}
return true
}
// ============================================================================
// WebSocket Frame Encoding/Decoding (for simulation)
// ============================================================================
struct WSFrame {
pub:
fin bool
opcode u8
masked bool
mask_key [4]u8
payload_len u64
payload []u8
}
fn encode_ws_frame(opcode u8, payload []u8, masked bool) []u8 {
payload_len := payload.len
mut frame := []u8{cap: 14 + payload_len}
frame << u8(0x80 | (opcode & 0x0F))
mut mask_bit := u8(0)
if masked {
mask_bit = 0x80
}
if payload_len <= 125 {
frame << mask_bit | u8(payload_len)
} else if payload_len <= 65535 {
frame << mask_bit | u8(126)
frame << u8(payload_len >> 8)
frame << u8(payload_len & 0xFF)
} else {
frame << mask_bit | u8(127)
for i := 7; i >= 0; i-- {
frame << u8((payload_len >> (i * 8)) & 0xFF)
}
}
if masked {
mask_key := [u8(0x12), 0x34, 0x56, 0x78]
frame << mask_key[0]
frame << mask_key[1]
frame << mask_key[2]
frame << mask_key[3]
for i, b in payload {
frame << b ^ mask_key[i % 4]
}
} else {
frame << payload
}
return frame
}
fn decode_ws_frame(data []u8) !WSFrame {
if data.len < 2 {
return error('Frame too short')
}
fin := (data[0] & 0x80) != 0
opcode := data[0] & 0x0F
masked := (data[1] & 0x80) != 0
mut payload_len := u64(data[1] & 0x7F)
mut offset := 2
if payload_len == 126 {
if data.len < 4 {
return error('Frame too short for extended length')
}
payload_len = u64(data[2]) << 8 | u64(data[3])
offset = 4
} else if payload_len == 127 {
if data.len < 10 {
return error('Frame too short for 64-bit length')
}
payload_len = 0
for i := 0; i < 8; i++ {
payload_len = (payload_len << 8) | u64(data[2 + i])
}
offset = 10
}
mut mask_key := [4]u8{}
if masked {
if data.len < offset + 4 {
return error('Frame too short for mask key')
}
mask_key[0] = data[offset]
mask_key[1] = data[offset + 1]
mask_key[2] = data[offset + 2]
mask_key[3] = data[offset + 3]
offset += 4
}
if data.len < offset + int(payload_len) {
return error('Frame too short for payload')
}
mut payload := data[offset..offset + int(payload_len)].clone()
if masked {
for i := 0; i < payload.len; i++ {
payload[i] = payload[i] ^ mask_key[i % 4]
}
}
return WSFrame{
fin: fin
opcode: opcode
masked: masked
mask_key: mask_key
payload_len: payload_len
payload: payload
}
}
fn build_close_frame(code int, reason string) []u8 {
mut payload := []u8{cap: 2 + reason.len}
payload << u8(code >> 8)
payload << u8(code & 0xFF)
if reason.len > 0 {
payload << reason.bytes()
}
return encode_ws_frame(ws_opcode_close, payload, false)
}
fn parse_close_frame(payload []u8) (int, string) {
mut code := ws_close_normal
mut reason := ''
if payload.len >= 2 {
code = int(payload[0]) << 8 | int(payload[1])
if payload.len > 2 {
reason = payload[2..].bytestr()
}
}
return code, reason
}
// ============================================================================
// Connection Lifecycle Simulator
// ============================================================================
// Simulates a complete WebSocket connection lifecycle
struct LifecycleSimulator {
mut:
tracker EventTracker
ws_ctx WSContext
http_ctx Context
is_open bool
messages []string
close_code int
close_reason string
}
fn create_lifecycle_simulator() LifecycleSimulator {
http_ctx := Context{
req: http.Request{
method: .get
url: '/ws/test'
}
params: {'room': 'test-room', 'id': '123'}
query: {'token': 'abc123'}
url: '/ws/test?token=abc123'
path: '/ws/test'
store: {'user_id': 'user-456'}
}
ws_ctx := WSContext{
http_ctx: &http_ctx
params: http_ctx.params.clone()
query: http_ctx.query.clone()
store: http_ctx.store.clone()
ready_state: .connecting
protocol: ''
socket: unsafe { nil }
}
return LifecycleSimulator{
tracker: EventTracker{}
ws_ctx: ws_ctx
http_ctx: http_ctx
is_open: false
messages: []string{}
close_code: 0
close_reason: ''
}
}
fn (mut sim LifecycleSimulator) simulate_open() {
sim.ws_ctx.ready_state = .open
sim.is_open = true
sim.tracker.record_open(sim.ws_ctx)
}
fn (mut sim LifecycleSimulator) simulate_message(data string, is_binary bool) {
if !sim.is_open {
return
}
event := WSMessageEvent{
data: data
data_bytes: data.bytes()
is_binary: is_binary
}
sim.messages << data
sim.tracker.record_message(event, sim.ws_ctx)
}
fn (mut sim LifecycleSimulator) simulate_close(code int, reason string) {
if !sim.is_open {
return
}
sim.ws_ctx.ready_state = .closing
sim.close_code = code
sim.close_reason = reason
event := WSCloseEvent{
code: code
reason: reason
was_clean: code == ws_close_normal
}
sim.tracker.record_close(event, sim.ws_ctx)
sim.ws_ctx.ready_state = .closed
sim.is_open = false
}
fn (mut sim LifecycleSimulator) simulate_error(error_msg string) {
sim.tracker.record_error(error_msg, sim.ws_ctx)
}
// ============================================================================
// Random Data Generators
// ============================================================================
fn generate_random_string(min_len int, max_len int) string {
chars := 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 '
len := rand.int_in_range(min_len, max_len + 1) or { min_len }
mut result := ''
for _ in 0 .. len {
idx := rand.int_in_range(0, chars.len) or { 0 }
result += chars[idx].ascii_str()
}
return result
}
fn generate_random_message_count() int {
return rand.int_in_range(0, 11) or { 0 } // 0 to 10 messages
}
fn generate_random_close_code() int {
codes := [1000, 1001, 1002, 1003, 1007, 1008, 1009, 1011]
idx := rand.int_in_range(0, codes.len) or { 0 }
return codes[idx]
}
// ============================================================================
// Property 4: Event Callback Invocation
// Feature: websocket-helper, Property 4: Event Callback Invocation
// Validates: Requirements 2.1, 2.2, 2.3, 2.4, 2.5
// ============================================================================
// Test that on_open is called exactly once at connection start
fn test_property_4_on_open_called_once() bool {
rand.seed([u32(time.now().unix()), u32(12345)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
// Simulate connection open
sim.simulate_open()
// Send random number of messages
msg_count := generate_random_message_count()
for _ in 0 .. msg_count {
sim.simulate_message(generate_random_string(5, 50), false)
}
// Close connection
sim.simulate_close(generate_random_close_code(), 'test close')
// Verify on_open was called exactly once
open_count := sim.tracker.count_events(.on_open)
if open_count != 1 {
println(' Iteration ${i}: on_open should be called exactly once')
println(' Expected: 1, Got: ${open_count}')
return false
}
}
return true
}
// Test that on_message is called for each message
fn test_property_4_on_message_called_for_each() bool {
rand.seed([u32(time.now().unix()), u32(23456)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
sim.simulate_open()
// Send random number of messages
msg_count := generate_random_message_count()
for _ in 0 .. msg_count {
sim.simulate_message(generate_random_string(5, 50), false)
}
sim.simulate_close(ws_close_normal, '')
// Verify on_message was called for each message
message_count := sim.tracker.count_events(.on_message)
if message_count != msg_count {
println(' Iteration ${i}: on_message count mismatch')
println(' Expected: ${msg_count}, Got: ${message_count}')
return false
}
}
return true
}
// Test that on_close is called exactly once at disconnection
fn test_property_4_on_close_called_once() bool {
rand.seed([u32(time.now().unix()), u32(34567)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
sim.simulate_open()
msg_count := generate_random_message_count()
for _ in 0 .. msg_count {
sim.simulate_message(generate_random_string(5, 50), false)
}
sim.simulate_close(generate_random_close_code(), 'test close')
// Verify on_close was called exactly once
close_count := sim.tracker.count_events(.on_close)
if close_count != 1 {
println(' Iteration ${i}: on_close should be called exactly once')
println(' Expected: 1, Got: ${close_count}')
return false
}
}
return true
}
// Test that events are called in correct order: open -> messages -> close
fn test_property_4_event_order() bool {
rand.seed([u32(time.now().unix()), u32(45678)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
sim.simulate_open()
msg_count := generate_random_message_count()
for _ in 0 .. msg_count {
sim.simulate_message(generate_random_string(5, 50), false)
}
sim.simulate_close(ws_close_normal, '')
// Get event sequence
sequence := sim.tracker.get_event_sequence()
// Verify sequence starts with on_open
if sequence.len == 0 || sequence[0] != .on_open {
println(' Iteration ${i}: First event should be on_open')
return false
}
// Verify sequence ends with on_close
if sequence[sequence.len - 1] != .on_close {
println(' Iteration ${i}: Last event should be on_close')
return false
}
// Verify all messages are between open and close
mut found_close := false
for j := 1; j < sequence.len - 1; j++ {
if sequence[j] == .on_close {
found_close = true
}
if found_close && sequence[j] == .on_message {
println(' Iteration ${i}: on_message should not occur after on_close')
return false
}
}
}
return true
}
// Test that all callbacks receive valid WSContext
fn test_property_4_valid_ws_context() bool {
rand.seed([u32(time.now().unix()), u32(56789)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
sim.simulate_open()
msg_count := generate_random_message_count()
for _ in 0 .. msg_count {
sim.simulate_message(generate_random_string(5, 50), false)
}
sim.simulate_close(ws_close_normal, '')
// Verify all callbacks received valid WSContext
if !sim.tracker.all_ws_contexts_valid() {
println(' Iteration ${i}: Some callbacks received invalid WSContext')
return false
}
}
return true
}
// Test message data is correctly passed to on_message callback
fn test_property_4_message_data_preserved() bool {
rand.seed([u32(time.now().unix()), u32(67890)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
sim.simulate_open()
// Generate and send messages
mut expected_messages := []string{}
msg_count := rand.int_in_range(1, 6) or { 1 }
for _ in 0 .. msg_count {
msg := generate_random_string(5, 50)
expected_messages << msg
sim.simulate_message(msg, false)
}
sim.simulate_close(ws_close_normal, '')
// Verify message data was preserved
mut msg_idx := 0
for event in sim.tracker.events {
if event.event_type == .on_message {
if msg_idx >= expected_messages.len {
println(' Iteration ${i}: More messages recorded than sent')
return false
}
if event.message_data != expected_messages[msg_idx] {
println(' Iteration ${i}: Message data mismatch at index ${msg_idx}')
println(' Expected: ${expected_messages[msg_idx]}')
println(' Got: ${event.message_data}')
return false
}
msg_idx++
}
}
}
return true
}
// Test close code and reason are correctly passed to on_close callback
fn test_property_4_close_data_preserved() bool {
rand.seed([u32(time.now().unix()), u32(78901)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
sim.simulate_open()
// Generate random close code and reason
close_code := generate_random_close_code()
close_reason := generate_random_string(5, 30)
sim.simulate_close(close_code, close_reason)
// Find close event and verify data
mut found_close := false
for event in sim.tracker.events {
if event.event_type == .on_close {
found_close = true
if event.close_code != close_code {
println(' Iteration ${i}: Close code mismatch')
println(' Expected: ${close_code}, Got: ${event.close_code}')
return false
}
if event.close_reason != close_reason {
println(' Iteration ${i}: Close reason mismatch')
println(' Expected: ${close_reason}, Got: ${event.close_reason}')
return false
}
break
}
}
if !found_close {
println(' Iteration ${i}: No close event found')
return false
}
}
return true
}
// Test binary message handling
fn test_property_4_binary_message_handling() bool {
rand.seed([u32(time.now().unix()), u32(89012)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
sim.simulate_open()
// Send mix of text and binary messages
mut expected_binary_flags := []bool{}
msg_count := rand.int_in_range(1, 6) or { 1 }
for _ in 0 .. msg_count {
is_binary := rand.int_in_range(0, 2) or { 0 } == 1
expected_binary_flags << is_binary
sim.simulate_message(generate_random_string(5, 50), is_binary)
}
sim.simulate_close(ws_close_normal, '')
// Verify binary flags were preserved
mut msg_idx := 0
for event in sim.tracker.events {
if event.event_type == .on_message {
if msg_idx >= expected_binary_flags.len {
println(' Iteration ${i}: More messages recorded than sent')
return false
}
if event.is_binary != expected_binary_flags[msg_idx] {
println(' Iteration ${i}: Binary flag mismatch at index ${msg_idx}')
println(' Expected: ${expected_binary_flags[msg_idx]}, Got: ${event.is_binary}')
return false
}
msg_idx++
}
}
}
return true
}
// Test complete lifecycle with all event types
fn test_property_4_complete_lifecycle() bool {
rand.seed([u32(time.now().unix()), u32(90123)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
// Full lifecycle: open -> messages -> close
sim.simulate_open()
msg_count := generate_random_message_count()
for _ in 0 .. msg_count {
sim.simulate_message(generate_random_string(5, 50), false)
}
sim.simulate_close(ws_close_normal, 'Normal closure')
// Verify complete lifecycle
sequence := sim.tracker.get_event_sequence()
// Should have: 1 open + N messages + 1 close
expected_len := 1 + msg_count + 1
if sequence.len != expected_len {
println(' Iteration ${i}: Event count mismatch')
println(' Expected: ${expected_len}, Got: ${sequence.len}')
return false
}
// Verify structure
if sequence[0] != .on_open {
println(' Iteration ${i}: First event should be on_open')
return false
}
for j := 1; j < sequence.len - 1; j++ {
if sequence[j] != .on_message {
println(' Iteration ${i}: Middle events should be on_message')
return false
}
}
if sequence[sequence.len - 1] != .on_close {
println(' Iteration ${i}: Last event should be on_close')
return false
}
}
return true
}
// Test error callback invocation
fn test_property_4_error_callback() bool {
rand.seed([u32(time.now().unix()), u32(11111)])
for i in 0 .. test_iterations {
mut sim := create_lifecycle_simulator()
sim.simulate_open()
// Simulate an error
error_msg := 'Test error: ${generate_random_string(10, 30)}'
sim.simulate_error(error_msg)
sim.simulate_close(1011, 'Internal error')
// Verify error was recorded
error_count := sim.tracker.count_events(.on_error)
if error_count != 1 {
println(' Iteration ${i}: on_error should be called once')
println(' Expected: 1, Got: ${error_count}')
return false
}
// Verify error message was preserved
for event in sim.tracker.events {
if event.event_type == .on_error {
if event.error_message != error_msg {
println(' Iteration ${i}: Error message mismatch')
println(' Expected: ${error_msg}')
println(' Got: ${event.error_message}')
return false
}
break
}
}
}
return true
}
fn main() {
println('🚀 Starting WebSocket Lifecycle Integration Tests...')
println('Feature: websocket-helper, Property 4: Event Callback Invocation')
println('Validates: Requirements 2.1, 2.2, 2.3, 2.4, 2.5')
println('Each property test runs ${test_iterations} iterations\n')
mut stats := PropertyTestStats{}
// Run property tests
stats.run_property_test('Property 4.1: on_open Called Once', test_property_4_on_open_called_once)
stats.run_property_test('Property 4.2: on_message Called For Each', test_property_4_on_message_called_for_each)
stats.run_property_test('Property 4.3: on_close Called Once', test_property_4_on_close_called_once)
stats.run_property_test('Property 4.4: Event Order (open -> messages -> close)', test_property_4_event_order)
stats.run_property_test('Property 4.5: Valid WSContext in All Callbacks', test_property_4_valid_ws_context)
stats.run_property_test('Property 4.6: Message Data Preserved', test_property_4_message_data_preserved)
stats.run_property_test('Property 4.7: Close Data Preserved', test_property_4_close_data_preserved)
stats.run_property_test('Property 4.8: Binary Message Handling', test_property_4_binary_message_handling)
stats.run_property_test('Property 4.9: Complete Lifecycle', test_property_4_complete_lifecycle)
stats.run_property_test('Property 4.10: Error Callback', test_property_4_error_callback)
// Print test summary
stats.print_summary()
}