v0.12.0 tcp and http server sinks added antested, no tls or access control
This commit is contained in:
@@ -11,7 +11,9 @@ import (
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_ "logwisp/src/internal/sink/console"
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_ "logwisp/src/internal/sink/file"
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_ "logwisp/src/internal/sink/http"
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_ "logwisp/src/internal/sink/null"
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_ "logwisp/src/internal/sink/tcp"
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"logwisp/src/internal/config"
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"logwisp/src/internal/service"
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@@ -12,9 +12,6 @@ type Config struct {
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StatusReporter bool `toml:"status_reporter"`
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ConfigAutoReload bool `toml:"auto_reload"`
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// Internal flag indicating demonized child process (DO NOT SET IN CONFIG FILE)
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BackgroundDaemon bool
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// Configuration file path
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ConfigFile string `toml:"config_file"`
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@@ -247,4 +244,24 @@ type FileSinkOptions struct {
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RetentionHours float64 `toml:"retention_hours"`
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BufferSize int64 `toml:"buffer_size"`
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FlushIntervalMs int64 `toml:"flush_interval_ms"`
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}
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// TCPSinkOptions defines settings for a TCP server sink
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type TCPSinkOptions struct {
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Host string `toml:"host"`
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Port int64 `toml:"port"`
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BufferSize int64 `toml:"buffer_size"`
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WriteTimeout int64 `toml:"write_timeout_ms"`
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KeepAlive bool `toml:"keep_alive"`
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KeepAlivePeriod int64 `toml:"keep_alive_period_ms"`
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}
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// HTTPSinkOptions defines settings for an HTTP SSE server sink
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type HTTPSinkOptions struct {
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Host string `toml:"host"`
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Port int64 `toml:"port"`
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StreamPath string `toml:"stream_path"`
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StatusPath string `toml:"status_path"`
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BufferSize int64 `toml:"buffer_size"`
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WriteTimeout int64 `toml:"write_timeout_ms"`
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}
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@@ -95,9 +95,6 @@ func defaults() *Config {
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StatusReporter: true,
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ConfigAutoReload: false,
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// Child process indicator
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BackgroundDaemon: false,
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// Existing defaults
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Logging: &LogConfig{
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Output: "stdout",
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@@ -252,12 +252,10 @@ func (m *Manager) startCleanup() {
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// cleanupIdleSessions removes sessions that have exceeded the maximum idle time.
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func (m *Manager) cleanupIdleSessions() {
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m.mu.Lock()
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defer m.mu.Unlock()
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now := time.Now()
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expiredSessions := make([]*Session, 0)
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m.mu.Lock()
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for id, session := range m.sessions {
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idleTime := now.Sub(session.LastActivity)
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@@ -268,13 +266,16 @@ func (m *Manager) cleanupIdleSessions() {
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}
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m.mu.Unlock()
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// Call callbacks outside of lock
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if len(expiredSessions) > 0 {
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m.callbacksMu.RLock()
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defer m.callbacksMu.RUnlock()
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callbacks := make(map[string]func(sessionID, remoteAddr string))
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for k, v := range m.expiryCallbacks {
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callbacks[k] = v
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}
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m.callbacksMu.RUnlock()
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for _, session := range expiredSessions {
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if callback, exists := m.expiryCallbacks[session.Source]; exists {
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if callback, exists := callbacks[session.Source]; exists {
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// Call callback to notify owner
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go callback(session.ID, session.RemoteAddr)
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}
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@@ -0,0 +1,8 @@
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package http
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import "time"
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const (
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HttpServerStartTimeout = 100 * time.Millisecond
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HttpServerShutdownTimeout = 2 * time.Second
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)
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@@ -0,0 +1,539 @@
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package http
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import (
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"bufio"
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"context"
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"encoding/json"
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"fmt"
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"net"
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"sync"
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"sync/atomic"
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"time"
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"logwisp/src/internal/config"
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"logwisp/src/internal/core"
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"logwisp/src/internal/plugin"
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"logwisp/src/internal/session"
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"logwisp/src/internal/sink"
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"logwisp/src/internal/version"
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lconfig "github.com/lixenwraith/config"
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"github.com/lixenwraith/log"
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"github.com/lixenwraith/log/compat"
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"github.com/valyala/fasthttp"
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)
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func init() {
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if err := plugin.RegisterSink("http", NewHTTPSinkPlugin); err != nil {
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panic(fmt.Sprintf("failed to register http sink: %v", err))
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}
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}
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// HTTPSink streams log entries via Server-Sent Events (SSE)
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type HTTPSink struct {
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// Plugin identity and session management
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id string
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proxy *session.Proxy
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// Configuration
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config *config.HTTPSinkOptions
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// Network
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server *fasthttp.Server
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// Application
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input chan core.TransportEvent
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logger *log.Logger
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// Runtime
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done chan struct{}
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wg sync.WaitGroup
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startTime time.Time
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// Broker
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clients map[uint64]chan []byte
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clientsMu sync.RWMutex
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unregister chan uint64
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nextClientID atomic.Uint64
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// Client session tracking
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clientSessions map[uint64]string // clientID -> sessionID
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sessionsMu sync.RWMutex
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// Statistics
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activeClients atomic.Int64
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totalProcessed atomic.Uint64
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lastProcessed atomic.Value // time.Time
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}
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// NewHTTPSinkPlugin creates an HTTP sink through plugin factory
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func NewHTTPSinkPlugin(
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id string,
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configMap map[string]any,
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logger *log.Logger,
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proxy *session.Proxy,
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) (sink.Sink, error) {
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opts := &config.HTTPSinkOptions{
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Host: "0.0.0.0",
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Port: 0,
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StreamPath: "/stream",
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StatusPath: "/status",
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BufferSize: 1000,
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WriteTimeout: 0, // SSE indefinite streaming
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}
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if err := lconfig.ScanMap(configMap, opts); err != nil {
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return nil, fmt.Errorf("failed to parse config: %w", err)
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}
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if opts.Port <= 0 || opts.Port > 65535 {
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return nil, fmt.Errorf("port must be between 1 and 65535")
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}
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if opts.BufferSize <= 0 {
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opts.BufferSize = 1000
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}
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if opts.StreamPath == "" {
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opts.StreamPath = "/stream"
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}
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if opts.StatusPath == "" {
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opts.StatusPath = "/status"
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}
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h := &HTTPSink{
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id: id,
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proxy: proxy,
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config: opts,
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input: make(chan core.TransportEvent, opts.BufferSize),
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done: make(chan struct{}),
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logger: logger,
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clients: make(map[uint64]chan []byte),
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unregister: make(chan uint64),
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clientSessions: make(map[uint64]string),
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}
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h.lastProcessed.Store(time.Time{})
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logger.Info("msg", "HTTP sink initialized",
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"component", "http_sink",
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"instance_id", id,
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"host", opts.Host,
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"port", opts.Port,
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"stream_path", opts.StreamPath,
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"status_path", opts.StatusPath)
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return h, nil
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}
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// Capabilities returns supported capabilities
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func (h *HTTPSink) Capabilities() []core.Capability {
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return []core.Capability{
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core.CapSessionAware,
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core.CapMultiSession,
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}
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}
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// Input returns the channel for sending transport events
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func (h *HTTPSink) Input() chan<- core.TransportEvent {
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return h.input
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}
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// Start initializes the HTTP server and begins the broker loop
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func (h *HTTPSink) Start(ctx context.Context) error {
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h.startTime = time.Now()
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// Start central broker goroutine
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h.wg.Add(1)
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go h.brokerLoop(ctx)
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fasthttpLogger := compat.NewFastHTTPAdapter(h.logger)
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h.server = &fasthttp.Server{
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Name: fmt.Sprintf("LogWisp/%s", version.Short()),
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Handler: h.requestHandler,
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DisableKeepalive: false,
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StreamRequestBody: true,
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Logger: fasthttpLogger,
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WriteTimeout: time.Duration(h.config.WriteTimeout) * time.Millisecond,
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}
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addr := fmt.Sprintf("%s:%d", h.config.Host, h.config.Port)
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errChan := make(chan error, 1)
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go func() {
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h.logger.Info("msg", "HTTP server starting",
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"component", "http_sink",
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"instance_id", h.id,
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"address", addr)
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err := h.server.ListenAndServe(addr)
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if err != nil {
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errChan <- err
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}
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}()
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// Monitor context for shutdown
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go func() {
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<-ctx.Done()
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if h.server != nil {
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shutdownCtx, cancel := context.WithTimeout(context.Background(), HttpServerShutdownTimeout)
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defer cancel()
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h.server.ShutdownWithContext(shutdownCtx)
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}
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}()
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// Check if server started
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select {
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case err := <-errChan:
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return err
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case <-time.After(HttpServerStartTimeout):
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h.logger.Info("msg", "HTTP server started",
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"component", "http_sink",
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"instance_id", h.id,
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"host", h.config.Host,
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"port", h.config.Port)
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return nil
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}
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}
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// Stop gracefully shuts down the HTTP server and all client connections
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func (h *HTTPSink) Stop() {
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h.logger.Info("msg", "Stopping HTTP sink",
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"component", "http_sink",
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"instance_id", h.id)
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close(h.done)
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if h.server != nil {
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ctx, cancel := context.WithTimeout(context.Background(), HttpServerShutdownTimeout)
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defer cancel()
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h.server.ShutdownWithContext(ctx)
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}
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h.wg.Wait()
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close(h.unregister)
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h.clientsMu.Lock()
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for _, ch := range h.clients {
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close(ch)
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}
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h.clients = make(map[uint64]chan []byte)
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h.clientsMu.Unlock()
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h.logger.Info("msg", "HTTP sink stopped",
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"component", "http_sink",
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"instance_id", h.id,
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"total_processed", h.totalProcessed.Load())
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}
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// GetStats returns sink statistics
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func (h *HTTPSink) GetStats() sink.SinkStats {
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lastProc, _ := h.lastProcessed.Load().(time.Time)
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return sink.SinkStats{
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ID: h.id,
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Type: "http",
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TotalProcessed: h.totalProcessed.Load(),
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ActiveConnections: h.activeClients.Load(),
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StartTime: h.startTime,
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LastProcessed: lastProc,
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Details: map[string]any{
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"host": h.config.Host,
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"port": h.config.Port,
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"buffer_size": h.config.BufferSize,
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"endpoints": map[string]string{
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"stream": h.config.StreamPath,
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"status": h.config.StatusPath,
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},
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},
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}
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}
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// brokerLoop manages client connections and broadcasts transport events
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func (h *HTTPSink) brokerLoop(ctx context.Context) {
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defer h.wg.Done()
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for {
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select {
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case <-ctx.Done():
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h.logger.Debug("msg", "Broker loop stopping due to context cancellation",
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"component", "http_sink")
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return
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case <-h.done:
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h.logger.Debug("msg", "Broker loop stopping due to shutdown signal",
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"component", "http_sink")
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return
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case clientID := <-h.unregister:
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h.clientsMu.Lock()
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if clientChan, exists := h.clients[clientID]; exists {
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delete(h.clients, clientID)
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close(clientChan)
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h.logger.Debug("msg", "Unregistered client",
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"component", "http_sink",
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"client_id", clientID)
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}
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h.clientsMu.Unlock()
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h.sessionsMu.Lock()
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delete(h.clientSessions, clientID)
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h.sessionsMu.Unlock()
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case event, ok := <-h.input:
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if !ok {
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h.logger.Debug("msg", "Input channel closed, broker stopping",
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"component", "http_sink")
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return
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}
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h.totalProcessed.Add(1)
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h.lastProcessed.Store(time.Now())
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h.clientsMu.RLock()
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clientCount := len(h.clients)
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if clientCount > 0 {
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var staleClients []uint64
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for id, ch := range h.clients {
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h.sessionsMu.RLock()
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sessionID, hasSession := h.clientSessions[id]
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h.sessionsMu.RUnlock()
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if !hasSession {
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staleClients = append(staleClients, id)
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continue
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}
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// Check session still exists via proxy
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if _, exists := h.proxy.GetSession(sessionID); !exists {
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staleClients = append(staleClients, id)
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continue
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}
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select {
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case ch <- event.Payload:
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h.proxy.UpdateActivity(sessionID)
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default:
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h.logger.Debug("msg", "Dropped event for slow client",
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"component", "http_sink",
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"client_id", id)
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}
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}
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if len(staleClients) > 0 {
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go func() {
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for _, clientID := range staleClients {
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select {
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case h.unregister <- clientID:
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case <-h.done:
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return
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}
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}
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}()
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}
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}
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h.clientsMu.RUnlock()
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}
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}
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}
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// requestHandler is the main entry point for all incoming HTTP requests
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func (h *HTTPSink) requestHandler(ctx *fasthttp.RequestCtx) {
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// IPv4-only enforcement - silent drop IPv6
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remoteAddr := ctx.RemoteAddr()
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if tcpAddr, ok := remoteAddr.(*net.TCPAddr); ok {
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if tcpAddr.IP.To4() == nil {
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ctx.SetConnectionClose()
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return
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}
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}
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|
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path := string(ctx.Path())
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|
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switch path {
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case h.config.StatusPath:
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h.handleStatus(ctx)
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case h.config.StreamPath:
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h.handleStream(ctx)
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default:
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ctx.SetStatusCode(fasthttp.StatusNotFound)
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ctx.SetContentType("application/json")
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json.NewEncoder(ctx).Encode(map[string]any{
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"error": "Not Found",
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})
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}
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}
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|
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// handleStream manages a client's Server-Sent Events (SSE) stream
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func (h *HTTPSink) handleStream(ctx *fasthttp.RequestCtx) {
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remoteAddrStr := ctx.RemoteAddr().String()
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|
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// Create session via proxy
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sess := h.proxy.CreateSession(remoteAddrStr, map[string]any{
|
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"type": "http_client",
|
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})
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|
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// Set SSE headers
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ctx.Response.Header.Set("Content-Type", "text/event-stream")
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ctx.Response.Header.Set("Cache-Control", "no-cache")
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ctx.Response.Header.Set("Connection", "keep-alive")
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ctx.Response.Header.Set("Access-Control-Allow-Origin", "*")
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ctx.Response.Header.Set("X-Accel-Buffering", "no")
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// Register client with broker
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clientID := h.nextClientID.Add(1)
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clientChan := make(chan []byte, h.config.BufferSize)
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h.clientsMu.Lock()
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h.clients[clientID] = clientChan
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h.clientsMu.Unlock()
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h.sessionsMu.Lock()
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h.clientSessions[clientID] = sess.ID
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h.sessionsMu.Unlock()
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streamFunc := func(w *bufio.Writer) {
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connectCount := h.activeClients.Add(1)
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h.logger.Debug("msg", "HTTP client connected",
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"component", "http_sink",
|
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"remote_addr", remoteAddrStr,
|
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"session_id", sess.ID,
|
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"client_id", clientID,
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"active_clients", connectCount)
|
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|
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h.wg.Add(1)
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defer func() {
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disconnectCount := h.activeClients.Add(-1)
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h.logger.Debug("msg", "HTTP client disconnected",
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"component", "http_sink",
|
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"remote_addr", remoteAddrStr,
|
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"session_id", sess.ID,
|
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"client_id", clientID,
|
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"active_clients", disconnectCount)
|
||||
|
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select {
|
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case h.unregister <- clientID:
|
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case <-h.done:
|
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}
|
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|
||||
h.proxy.RemoveSession(sess.ID)
|
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h.wg.Done()
|
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}()
|
||||
|
||||
// Send connected event with metadata
|
||||
connectionInfo := map[string]any{
|
||||
"client_id": fmt.Sprintf("%d", clientID),
|
||||
"session_id": sess.ID,
|
||||
"instance_id": h.id,
|
||||
"stream_path": h.config.StreamPath,
|
||||
"status_path": h.config.StatusPath,
|
||||
"buffer_size": h.config.BufferSize,
|
||||
}
|
||||
data, _ := json.Marshal(connectionInfo)
|
||||
fmt.Fprintf(w, "event: connected\ndata: %s\n\n", data)
|
||||
if err := w.Flush(); err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
for {
|
||||
select {
|
||||
case payload, ok := <-clientChan:
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
|
||||
if err := h.writeSSE(w, payload); err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
if err := w.Flush(); err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
h.proxy.UpdateActivity(sess.ID)
|
||||
|
||||
case <-h.done:
|
||||
fmt.Fprintf(w, "event: disconnect\ndata: {\"reason\":\"server_shutdown\"}\n\n")
|
||||
w.Flush()
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ctx.SetBodyStreamWriter(streamFunc)
|
||||
}
|
||||
|
||||
// handleStatus provides a JSON status report
|
||||
func (h *HTTPSink) handleStatus(ctx *fasthttp.RequestCtx) {
|
||||
ctx.SetContentType("application/json")
|
||||
|
||||
status := map[string]any{
|
||||
"service": "LogWisp",
|
||||
"version": version.Short(),
|
||||
"instance_id": h.id,
|
||||
"server": map[string]any{
|
||||
"type": "http",
|
||||
"host": h.config.Host,
|
||||
"port": h.config.Port,
|
||||
"active_clients": h.activeClients.Load(),
|
||||
"buffer_size": h.config.BufferSize,
|
||||
"uptime_seconds": int(time.Since(h.startTime).Seconds()),
|
||||
},
|
||||
"endpoints": map[string]string{
|
||||
"stream": h.config.StreamPath,
|
||||
"status": h.config.StatusPath,
|
||||
},
|
||||
"statistics": map[string]any{
|
||||
"total_processed": h.totalProcessed.Load(),
|
||||
},
|
||||
}
|
||||
|
||||
data, _ := json.Marshal(status)
|
||||
ctx.SetBody(data)
|
||||
}
|
||||
|
||||
// writeSSE formats payload into SSE data format
|
||||
func (h *HTTPSink) writeSSE(w *bufio.Writer, payload []byte) error {
|
||||
// Handle multi-line payloads per W3C SSE spec
|
||||
lines := splitLines(payload)
|
||||
for _, line := range lines {
|
||||
if _, err := fmt.Fprintf(w, "data: %s\n", line); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
// Empty line terminates event
|
||||
if _, err := w.WriteString("\n"); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// splitLines splits payload by newlines, handling different line endings
|
||||
func splitLines(data []byte) [][]byte {
|
||||
if len(data) == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
// Trim trailing newline if present
|
||||
if data[len(data)-1] == '\n' {
|
||||
data = data[:len(data)-1]
|
||||
}
|
||||
|
||||
var lines [][]byte
|
||||
start := 0
|
||||
for i := 0; i < len(data); i++ {
|
||||
if data[i] == '\n' {
|
||||
lines = append(lines, data[start:i])
|
||||
start = i + 1
|
||||
}
|
||||
}
|
||||
if start < len(data) {
|
||||
lines = append(lines, data[start:])
|
||||
}
|
||||
|
||||
if len(lines) == 0 {
|
||||
return [][]byte{data}
|
||||
}
|
||||
return lines
|
||||
}
|
||||
@@ -0,0 +1,434 @@
|
||||
package tcp
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"context"
|
||||
"fmt"
|
||||
"net"
|
||||
"sync"
|
||||
"sync/atomic"
|
||||
"time"
|
||||
|
||||
"logwisp/src/internal/config"
|
||||
"logwisp/src/internal/core"
|
||||
"logwisp/src/internal/plugin"
|
||||
"logwisp/src/internal/session"
|
||||
"logwisp/src/internal/sink"
|
||||
|
||||
lconfig "github.com/lixenwraith/config"
|
||||
"github.com/lixenwraith/log"
|
||||
"github.com/lixenwraith/log/compat"
|
||||
"github.com/panjf2000/gnet/v2"
|
||||
)
|
||||
|
||||
func init() {
|
||||
if err := plugin.RegisterSink("tcp", NewTCPSinkPlugin); err != nil {
|
||||
panic(fmt.Sprintf("failed to register tcp sink: %v", err))
|
||||
}
|
||||
}
|
||||
|
||||
// TCPSink streams log entries to connected TCP clients
|
||||
type TCPSink struct {
|
||||
// Plugin identity and session management
|
||||
id string
|
||||
proxy *session.Proxy
|
||||
|
||||
// Configuration
|
||||
config *config.TCPSinkOptions
|
||||
|
||||
// Network
|
||||
server *tcpServer
|
||||
engine *gnet.Engine
|
||||
engineMu sync.Mutex
|
||||
|
||||
// Application
|
||||
input chan core.TransportEvent
|
||||
logger *log.Logger
|
||||
|
||||
// Runtime
|
||||
done chan struct{}
|
||||
wg sync.WaitGroup
|
||||
startTime time.Time
|
||||
|
||||
// Statistics
|
||||
activeConns atomic.Int64
|
||||
totalProcessed atomic.Uint64
|
||||
lastProcessed atomic.Value // time.Time
|
||||
|
||||
// Error tracking
|
||||
writeErrors atomic.Uint64
|
||||
consecutiveWriteErrors map[gnet.Conn]int
|
||||
errorMu sync.Mutex
|
||||
}
|
||||
|
||||
// NewTCPSinkPlugin creates a TCP sink through plugin factory
|
||||
func NewTCPSinkPlugin(
|
||||
id string,
|
||||
configMap map[string]any,
|
||||
logger *log.Logger,
|
||||
proxy *session.Proxy,
|
||||
) (sink.Sink, error) {
|
||||
// Create config struct with defaults
|
||||
opts := &config.TCPSinkOptions{
|
||||
Host: "0.0.0.0",
|
||||
Port: 0, // Required
|
||||
BufferSize: 1000,
|
||||
WriteTimeout: 5000,
|
||||
KeepAlive: true,
|
||||
KeepAlivePeriod: 30000,
|
||||
}
|
||||
|
||||
// Parse config map into struct
|
||||
if err := lconfig.ScanMap(configMap, opts); err != nil {
|
||||
return nil, fmt.Errorf("failed to parse config: %w", err)
|
||||
}
|
||||
|
||||
// Validate required fields
|
||||
if opts.Port <= 0 || opts.Port > 65535 {
|
||||
return nil, fmt.Errorf("port must be between 1 and 65535")
|
||||
}
|
||||
if opts.BufferSize <= 0 {
|
||||
opts.BufferSize = 1000
|
||||
}
|
||||
|
||||
t := &TCPSink{
|
||||
id: id,
|
||||
proxy: proxy,
|
||||
config: opts,
|
||||
input: make(chan core.TransportEvent, opts.BufferSize),
|
||||
done: make(chan struct{}),
|
||||
logger: logger,
|
||||
consecutiveWriteErrors: make(map[gnet.Conn]int),
|
||||
}
|
||||
t.lastProcessed.Store(time.Time{})
|
||||
|
||||
logger.Info("msg", "TCP sink initialized",
|
||||
"component", "tcp_sink",
|
||||
"instance_id", id,
|
||||
"host", opts.Host,
|
||||
"port", opts.Port)
|
||||
|
||||
return t, nil
|
||||
}
|
||||
|
||||
// Capabilities returns supported capabilities
|
||||
func (t *TCPSink) Capabilities() []core.Capability {
|
||||
return []core.Capability{
|
||||
core.CapSessionAware,
|
||||
core.CapMultiSession,
|
||||
}
|
||||
}
|
||||
|
||||
// Input returns the channel for sending transport events
|
||||
func (t *TCPSink) Input() chan<- core.TransportEvent {
|
||||
return t.input
|
||||
}
|
||||
|
||||
// Start initializes the TCP server and begins the broadcast loop
|
||||
func (t *TCPSink) Start(ctx context.Context) error {
|
||||
t.server = &tcpServer{
|
||||
sink: t,
|
||||
clients: make(map[gnet.Conn]*tcpClient),
|
||||
}
|
||||
|
||||
t.startTime = time.Now()
|
||||
|
||||
// Start broadcast loop
|
||||
t.wg.Add(1)
|
||||
go func() {
|
||||
defer t.wg.Done()
|
||||
t.broadcastLoop(ctx)
|
||||
}()
|
||||
|
||||
// Configure gnet
|
||||
addr := fmt.Sprintf("tcp://%s:%d", t.config.Host, t.config.Port)
|
||||
gnetLogger := compat.NewGnetAdapter(t.logger)
|
||||
|
||||
opts := []gnet.Option{
|
||||
gnet.WithLogger(gnetLogger),
|
||||
gnet.WithMulticore(true),
|
||||
gnet.WithReusePort(true),
|
||||
}
|
||||
|
||||
// Start gnet server
|
||||
errChan := make(chan error, 1)
|
||||
go func() {
|
||||
t.logger.Info("msg", "Starting TCP server",
|
||||
"component", "tcp_sink",
|
||||
"host", t.config.Host,
|
||||
"port", t.config.Port)
|
||||
|
||||
err := gnet.Run(t.server, addr, opts...)
|
||||
if err != nil {
|
||||
t.logger.Error("msg", "TCP server failed",
|
||||
"component", "tcp_sink",
|
||||
"error", err)
|
||||
}
|
||||
errChan <- err
|
||||
}()
|
||||
|
||||
// Monitor context for shutdown
|
||||
go func() {
|
||||
<-ctx.Done()
|
||||
t.engineMu.Lock()
|
||||
if t.engine != nil {
|
||||
shutdownCtx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
||||
defer cancel()
|
||||
(*t.engine).Stop(shutdownCtx)
|
||||
}
|
||||
t.engineMu.Unlock()
|
||||
}()
|
||||
|
||||
// Wait briefly for server to start or fail
|
||||
select {
|
||||
case err := <-errChan:
|
||||
close(t.done)
|
||||
t.wg.Wait()
|
||||
return err
|
||||
case <-time.After(100 * time.Millisecond):
|
||||
t.logger.Info("msg", "TCP server started",
|
||||
"component", "tcp_sink",
|
||||
"instance_id", t.id,
|
||||
"port", t.config.Port)
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
// Stop gracefully shuts down the TCP sink
|
||||
func (t *TCPSink) Stop() {
|
||||
t.logger.Info("msg", "Stopping TCP sink",
|
||||
"component", "tcp_sink",
|
||||
"instance_id", t.id)
|
||||
|
||||
close(t.done)
|
||||
|
||||
// Stop gnet engine
|
||||
t.engineMu.Lock()
|
||||
engine := t.engine
|
||||
t.engineMu.Unlock()
|
||||
|
||||
if engine != nil {
|
||||
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
||||
defer cancel()
|
||||
(*engine).Stop(ctx)
|
||||
}
|
||||
|
||||
t.wg.Wait()
|
||||
|
||||
t.logger.Info("msg", "TCP sink stopped",
|
||||
"component", "tcp_sink",
|
||||
"instance_id", t.id,
|
||||
"total_processed", t.totalProcessed.Load())
|
||||
}
|
||||
|
||||
// GetStats returns sink statistics
|
||||
func (t *TCPSink) GetStats() sink.SinkStats {
|
||||
lastProc, _ := t.lastProcessed.Load().(time.Time)
|
||||
|
||||
return sink.SinkStats{
|
||||
ID: t.id,
|
||||
Type: "tcp",
|
||||
TotalProcessed: t.totalProcessed.Load(),
|
||||
ActiveConnections: t.activeConns.Load(),
|
||||
StartTime: t.startTime,
|
||||
LastProcessed: lastProc,
|
||||
Details: map[string]any{
|
||||
"host": t.config.Host,
|
||||
"port": t.config.Port,
|
||||
"buffer_size": t.config.BufferSize,
|
||||
"write_errors": t.writeErrors.Load(),
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
// tcpServer implements gnet.EventHandler
|
||||
type tcpServer struct {
|
||||
gnet.BuiltinEventEngine
|
||||
sink *TCPSink
|
||||
clients map[gnet.Conn]*tcpClient
|
||||
mu sync.RWMutex
|
||||
}
|
||||
|
||||
// tcpClient represents a connected TCP client
|
||||
type tcpClient struct {
|
||||
conn gnet.Conn
|
||||
buffer bytes.Buffer
|
||||
sessionID string
|
||||
}
|
||||
|
||||
// broadcastLoop sends transport events to all connected clients
|
||||
func (t *TCPSink) broadcastLoop(ctx context.Context) {
|
||||
for {
|
||||
select {
|
||||
case <-ctx.Done():
|
||||
return
|
||||
case event, ok := <-t.input:
|
||||
if !ok {
|
||||
return
|
||||
}
|
||||
t.totalProcessed.Add(1)
|
||||
t.lastProcessed.Store(time.Now())
|
||||
t.broadcastData(event.Payload)
|
||||
case <-t.done:
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// OnBoot is called when the server starts
|
||||
func (s *tcpServer) OnBoot(eng gnet.Engine) gnet.Action {
|
||||
s.sink.engineMu.Lock()
|
||||
s.sink.engine = &eng
|
||||
s.sink.engineMu.Unlock()
|
||||
|
||||
s.sink.logger.Debug("msg", "TCP server booted",
|
||||
"component", "tcp_sink",
|
||||
"instance_id", s.sink.id)
|
||||
return gnet.None
|
||||
}
|
||||
|
||||
// OnOpen is called when a new connection is established
|
||||
func (s *tcpServer) OnOpen(c gnet.Conn) (out []byte, action gnet.Action) {
|
||||
remoteAddr := c.RemoteAddr()
|
||||
remoteAddrStr := remoteAddr.String()
|
||||
|
||||
s.sink.logger.Debug("msg", "TCP connection attempt",
|
||||
"component", "tcp_sink",
|
||||
"remote_addr", remoteAddrStr)
|
||||
|
||||
// Reject IPv6 connections
|
||||
if tcpAddr, ok := remoteAddr.(*net.TCPAddr); ok {
|
||||
if tcpAddr.IP.To4() == nil {
|
||||
s.sink.logger.Warn("msg", "IPv6 connection rejected",
|
||||
"component", "tcp_sink",
|
||||
"remote_addr", remoteAddrStr)
|
||||
return []byte("IPv4-only (IPv6 not supported)\n"), gnet.Close
|
||||
}
|
||||
}
|
||||
|
||||
// Create session via proxy
|
||||
sess := s.sink.proxy.CreateSession(remoteAddrStr, map[string]any{
|
||||
"type": "tcp_client",
|
||||
"remote_addr": remoteAddrStr,
|
||||
})
|
||||
|
||||
client := &tcpClient{
|
||||
conn: c,
|
||||
sessionID: sess.ID,
|
||||
}
|
||||
|
||||
s.mu.Lock()
|
||||
s.clients[c] = client
|
||||
s.mu.Unlock()
|
||||
|
||||
newCount := s.sink.activeConns.Add(1)
|
||||
s.sink.logger.Debug("msg", "TCP connection opened",
|
||||
"component", "tcp_sink",
|
||||
"remote_addr", remoteAddrStr,
|
||||
"session_id", sess.ID,
|
||||
"active_connections", newCount)
|
||||
|
||||
return nil, gnet.None
|
||||
}
|
||||
|
||||
// OnClose is called when a connection is closed
|
||||
func (s *tcpServer) OnClose(c gnet.Conn, err error) gnet.Action {
|
||||
remoteAddrStr := c.RemoteAddr().String()
|
||||
|
||||
s.mu.RLock()
|
||||
client, exists := s.clients[c]
|
||||
s.mu.RUnlock()
|
||||
|
||||
if exists && client.sessionID != "" {
|
||||
s.sink.proxy.RemoveSession(client.sessionID)
|
||||
s.sink.logger.Debug("msg", "Session removed",
|
||||
"component", "tcp_sink",
|
||||
"session_id", client.sessionID,
|
||||
"remote_addr", remoteAddrStr)
|
||||
}
|
||||
|
||||
s.mu.Lock()
|
||||
delete(s.clients, c)
|
||||
s.mu.Unlock()
|
||||
|
||||
s.sink.errorMu.Lock()
|
||||
delete(s.sink.consecutiveWriteErrors, c)
|
||||
s.sink.errorMu.Unlock()
|
||||
|
||||
newCount := s.sink.activeConns.Add(-1)
|
||||
s.sink.logger.Debug("msg", "TCP connection closed",
|
||||
"component", "tcp_sink",
|
||||
"remote_addr", remoteAddrStr,
|
||||
"active_connections", newCount,
|
||||
"error", err)
|
||||
|
||||
return gnet.None
|
||||
}
|
||||
|
||||
// OnTraffic is called when data is received from a connection
|
||||
func (s *tcpServer) OnTraffic(c gnet.Conn) gnet.Action {
|
||||
s.mu.RLock()
|
||||
client, exists := s.clients[c]
|
||||
s.mu.RUnlock()
|
||||
|
||||
// Update session activity
|
||||
if exists && client.sessionID != "" {
|
||||
s.sink.proxy.UpdateActivity(client.sessionID)
|
||||
}
|
||||
|
||||
// TCP sink doesn't expect data from clients, discard
|
||||
c.Discard(-1)
|
||||
return gnet.None
|
||||
}
|
||||
|
||||
// broadcastData sends data to all connected clients
|
||||
func (t *TCPSink) broadcastData(data []byte) {
|
||||
t.server.mu.RLock()
|
||||
defer t.server.mu.RUnlock()
|
||||
|
||||
for conn, client := range t.server.clients {
|
||||
// Update session activity
|
||||
if client.sessionID != "" {
|
||||
t.proxy.UpdateActivity(client.sessionID)
|
||||
}
|
||||
|
||||
conn.AsyncWrite(data, func(c gnet.Conn, err error) error {
|
||||
if err != nil {
|
||||
t.writeErrors.Add(1)
|
||||
t.handleWriteError(c, err)
|
||||
} else {
|
||||
t.errorMu.Lock()
|
||||
delete(t.consecutiveWriteErrors, c)
|
||||
t.errorMu.Unlock()
|
||||
}
|
||||
return nil
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
// handleWriteError manages errors during async writes
|
||||
func (t *TCPSink) handleWriteError(c gnet.Conn, err error) {
|
||||
remoteAddrStr := c.RemoteAddr().String()
|
||||
|
||||
t.errorMu.Lock()
|
||||
defer t.errorMu.Unlock()
|
||||
|
||||
t.consecutiveWriteErrors[c]++
|
||||
errorCount := t.consecutiveWriteErrors[c]
|
||||
|
||||
t.logger.Debug("msg", "AsyncWrite error",
|
||||
"component", "tcp_sink",
|
||||
"remote_addr", remoteAddrStr,
|
||||
"error", err,
|
||||
"consecutive_errors", errorCount)
|
||||
|
||||
// Close connection after 3 consecutive write errors
|
||||
if errorCount >= 3 {
|
||||
t.logger.Warn("msg", "Closing connection due to repeated write errors",
|
||||
"component", "tcp_sink",
|
||||
"remote_addr", remoteAddrStr,
|
||||
"error_count", errorCount)
|
||||
delete(t.consecutiveWriteErrors, c)
|
||||
c.Close()
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user