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|
package websockets
import (
"net/http"
"sync"
"time"
"github.com/fasthttp/websocket"
"github.com/google/uuid"
endure "github.com/spiral/endure/pkg/container"
"github.com/spiral/errors"
"github.com/spiral/roadrunner/v2/pkg/pubsub"
"github.com/spiral/roadrunner/v2/plugins/config"
"github.com/spiral/roadrunner/v2/plugins/logger"
"github.com/spiral/roadrunner/v2/plugins/websockets/connection"
"github.com/spiral/roadrunner/v2/plugins/websockets/executor"
"github.com/spiral/roadrunner/v2/plugins/websockets/pool"
"github.com/spiral/roadrunner/v2/plugins/websockets/storage"
)
const (
PluginName string = "websockets"
)
type Plugin struct {
sync.RWMutex
// Collection with all available pubsubs
pubsubs map[string]pubsub.PubSub
Config *Config
log logger.Logger
// global connections map
connections sync.Map
storage *storage.Storage
workersPool *pool.WorkersPool
}
func (p *Plugin) Init(cfg config.Configurer, log logger.Logger) error {
const op = errors.Op("websockets_plugin_init")
if !cfg.Has(PluginName) {
return errors.E(op, errors.Disabled)
}
err := cfg.UnmarshalKey(PluginName, &p.Config)
if err != nil {
return errors.E(op, err)
}
p.pubsubs = make(map[string]pubsub.PubSub)
p.log = log
p.storage = storage.NewStorage()
p.workersPool = pool.NewWorkersPool(p.storage, &p.connections, log)
return nil
}
func (p *Plugin) Serve() chan error {
errCh := make(chan error)
// run all pubsubs drivers
for _, v := range p.pubsubs {
go func(ps pubsub.PubSub) {
for {
data, err := ps.Next()
if err != nil {
errCh <- err
return
}
if data == nil {
continue
}
p.workersPool.Queue(data)
}
}(v)
}
return errCh
}
func (p *Plugin) Stop() error {
p.workersPool.Stop()
return nil
}
func (p *Plugin) Collects() []interface{} {
return []interface{}{
p.GetPublishers,
}
}
func (p *Plugin) Available() {}
func (p *Plugin) RPC() interface{} {
return &rpc{
plugin: p,
log: p.log,
}
}
func (p *Plugin) Name() string {
return PluginName
}
// GetPublishers collects all pubsubs
func (p *Plugin) GetPublishers(name endure.Named, pub pubsub.PubSub) {
p.pubsubs[name.Name()] = pub
}
func (p *Plugin) Middleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != p.Config.Path {
next.ServeHTTP(w, r)
return
}
// connection upgrader
upgraded := websocket.Upgrader{
HandshakeTimeout: time.Second * 60,
ReadBufferSize: 0,
WriteBufferSize: 0,
WriteBufferPool: nil,
Subprotocols: nil,
Error: nil,
CheckOrigin: nil,
EnableCompression: false,
}
// upgrade connection to websocket connection
_conn, err := upgraded.Upgrade(w, r, nil)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
safeConn := connection.NewConnection(_conn, p.log)
defer func() {
err = safeConn.Close()
if err != nil {
p.log.Error("connection close error", "error", err)
}
}()
// generate UUID from the connection
connectionID := uuid.NewString()
// store connection
p.connections.Store(connectionID, safeConn)
// when exiting - delete the connection
defer func() {
p.connections.Delete(connectionID)
}()
// Executor wraps a connection to have a safe abstraction
p.Lock()
e := executor.NewExecutor(safeConn, p.log, p.storage, connectionID, p.pubsubs)
p.Unlock()
p.log.Info("websocket client connected", "uuid", connectionID)
err = e.StartCommandLoop()
if err != nil {
p.log.Error("command loop error", "error", err.Error())
return
}
})
}
// Publish is an entry point to the websocket PUBSUB
func (p *Plugin) Publish(msg []pubsub.Message) error {
p.Lock()
defer p.Unlock()
for i := 0; i < len(msg); i++ {
for j := 0; j < len(msg[i].Topics()); j++ {
if br, ok := p.pubsubs[msg[i].Broker()]; ok {
err := br.Publish(msg)
if err != nil {
return errors.E(err)
}
} else {
p.log.Warn("no such broker", "available", p.pubsubs, "requested", msg[i].Broker())
}
}
}
return nil
}
func (p *Plugin) PublishAsync(msg []pubsub.Message) {
go func() {
p.Lock()
defer p.Unlock()
for i := 0; i < len(msg); i++ {
for j := 0; j < len(msg[i].Topics()); j++ {
err := p.pubsubs[msg[i].Broker()].Publish(msg)
if err != nil {
p.log.Error("publish async error", "error", err)
return
}
}
}
}()
}
|
