diff --git a/examples/bulk-socket/go.mod b/examples/bulk-socket/go.mod new file mode 100644 index 0000000..f10469c --- /dev/null +++ b/examples/bulk-socket/go.mod @@ -0,0 +1,10 @@ +module bulk + +go 1.14 + +require ( + github.com/gin-contrib/sse v0.1.0 + github.com/gin-gonic/gin v1.6.3 + github.com/hodgesds/iouring-go v0.0.0-20200506041732-4ec64dcb5875 + github.com/r3labs/sse v0.0.0-20200310095403-ee05428e4d0e +) diff --git a/examples/bulk-socket/go.sum b/examples/bulk-socket/go.sum new file mode 100644 index 0000000..e8c2a84 --- /dev/null +++ b/examples/bulk-socket/go.sum @@ -0,0 +1,53 @@ +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE= +github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI= +github.com/gin-gonic/gin v1.6.3 h1:ahKqKTFpO5KTPHxWZjEdPScmYaGtLo8Y4DMHoEsnp14= +github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M= +github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4= +github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q= +github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8= +github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no= +github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA= +github.com/go-playground/validator/v10 v10.2.0 h1:KgJ0snyC2R9VXYN2rneOtQcw5aHQB1Vv0sFl1UcHBOY= +github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI= +github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I= +github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw= +github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg= +github.com/hodgesds/iouring-go v0.0.0-20200506041732-4ec64dcb5875 h1:QSVBRVqTQRNTVnNxffYcJy5MD7YD89SANqHQD5RP+QQ= +github.com/hodgesds/iouring-go v0.0.0-20200506041732-4ec64dcb5875/go.mod h1:HbMokKokhmAlGWaSJRUCUhhTudi+e0ZFvZq9b6JYHRo= +github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4= +github.com/leodido/go-urn v1.2.0 h1:hpXL4XnriNwQ/ABnpepYM/1vCLWNDfUNts8dX3xTG6Y= +github.com/leodido/go-urn v1.2.0/go.mod h1:+8+nEpDfqqsY+g338gtMEUOtuK+4dEMhiQEgxpxOKII= +github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY= +github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU= +github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q= +github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0= +github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4= +github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/r3labs/sse v0.0.0-20200310095403-ee05428e4d0e h1:w3ZemLxSM2hb3bHk7wjNaAAluaDQ+9WnWZQV1wcA8f4= +github.com/r3labs/sse v0.0.0-20200310095403-ee05428e4d0e/go.mod h1:S8xSOnV3CgpNrWd0GQ/OoQfMtlg2uPRSuTzcSGrzwK8= +github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= +github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI= +github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= +github.com/ugorji/go v1.1.7 h1:/68gy2h+1mWMrwZFeD1kQialdSzAb432dtpeJ42ovdo= +github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw= +github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs= +github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY= +golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= +golang.org/x/net v0.0.0-20191116160921-f9c825593386 h1:ktbWvQrW08Txdxno1PiDpSxPXG6ndGsfnJjRRtkM0LQ= +golang.org/x/net v0.0.0-20191116160921-f9c825593386/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5 h1:LfCXLvNmTYH9kEmVgqbnsWfruoXZIrh4YBgqVHtDvw0= +golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= 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"unsafe" + + gsse "github.com/gin-contrib/sse" + "github.com/gin-gonic/gin" + "github.com/hodgesds/iouring-go" + "github.com/r3labs/sse" +) + +var ( + fds = make([]int32, 0) + message []byte + ring *iouring.Ring +) + +func main() { + msg := struct { + ID int + Author string + Content string + }{ + 112, + "Sample User", + "Sample message 123", + } + + // Create a static message to deliver that can also be compared against when we receive it over the network + message, _ = json.Marshal(msg) + + ring, _ = iouring.New(1024, &iouring.Params{}) + + // Start a new go routine that sends a message every second + go sendMessage() + + r := gin.Default() + + // Create a SSE endpoint that hijacks all incoming connections and adds their underlying file descriptors to an array + r.GET("/listen", func(c *gin.Context) { + c.Header("Content-Type", "text/event-stream") + c.Writer.WriteHeaderNow() + + nc, _, _ := c.Writer.Hijack() + + sf, _ := nc.(*net.TCPConn).File() + + fds = append(fds, int32(sf.Fd())) + }) + + l, err := net.Listen("tcp", ":0") + if err != nil { + panic(err) + } + + addr := fmt.Sprintf("http://localhost:%d/listen", l.Addr().(*net.TCPAddr).Port) + + go http.Serve(l, r) + + // Spawn n many clients to establish an SSE + for i := 0; i < 10; i++ { + time.Sleep(100 * time.Millisecond) + go spawnClient(addr) + } + + select {} +} + +type backOff struct{} + +func (b *backOff) NextBackOff() time.Duration { return -1 } +func (b *backOff) Reset() {} + +func spawnClient(addr string) { + c := sse.NewClient(addr) + c.ReconnectStrategy = &backOff{} + + // Subscribe to the SSE endpoint + if err := c.Subscribe("", func(evt *sse.Event) { + // If we receive an event that isn't equal to our preset message, it has been corrupted + if string(message) != string(evt.Data) { + log.Fatalf("Client received invalid response, expected: %s but got %s", string(message), string(evt.Data)) + } + }); err != nil { + log.Fatalln(err.Error()) + } +} + +func sendMessage() { + for { + time.Sleep(1 * time.Second) + + if err := send(fds, message); err != nil { + log.Fatal(err.Error()) + } + } +} + +func send(fds []int32, data []byte) error { + fmt.Printf("Sending %d bytes to %d sockets\n", len(data), len(fds)) + + var b bytes.Buffer + // Encode the JSON message into an SSE + if err := gsse.Encode(&b, gsse.Event{ + Event: "message", + Data: json.RawMessage(data), + }); err != nil { + return err + } + + sdata := b.Bytes() + + wire := bytes.Buffer{} + + // Wrap the SSE into the chunked http wire format + fmt.Fprintf(&wire, "%x\r\n", len(sdata)) + wire.Write(sdata) + wire.WriteString("\r\n") + + rawData := wire.Bytes() + + addr := (uint64)(uintptr(unsafe.Pointer(&rawData[0]))) + length := uint32(len(rawData)) + + // Queue up n many SQE's for each file descriptor + for _, fd := range fds { + e, commit := ring.SubmitEntry() + + e.Opcode = iouring.WriteFixed + e.Fd = fd + e.Addr = addr + e.Len = length + + commit() + } + + return ring.Enter(uint(len(fds)), uint(len(fds)), iouring.EnterGetEvents, nil) +}