95 lines
2.3 KiB
Go
95 lines
2.3 KiB
Go
package main
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"time"
|
|
|
|
"clickandjoin.app/serversenteventsserver/modules/cache"
|
|
"clickandjoin.app/serversenteventsserver/modules/config"
|
|
"clickandjoin.app/serversenteventsserver/modules/rabbitmq"
|
|
"clickandjoin.app/serversenteventsserver/modules/structs"
|
|
gocnjhelper "git.clickandjoin.umbach.dev/ClickandJoin/go-cnj-helper"
|
|
"github.com/gofiber/fiber/v2"
|
|
"github.com/gofiber/fiber/v2/middleware/cors"
|
|
"github.com/google/uuid"
|
|
"github.com/valyala/fasthttp"
|
|
)
|
|
|
|
func init() {
|
|
config.LoadConfig()
|
|
|
|
cfg := config.Cfg
|
|
|
|
gocnjhelper.InitLogger(config.Cfg.Debug,
|
|
true,
|
|
true,
|
|
gocnjhelper.GetConnectionString(cfg.RabbitMq.Username, cfg.RabbitMq.Password, cfg.RabbitMq.Host),
|
|
cfg.ServiceName,
|
|
cfg.ServiceType)
|
|
|
|
go rabbitmq.Init()
|
|
}
|
|
|
|
func main() {
|
|
app := fiber.New()
|
|
|
|
// wait so that rabbitmq can connect
|
|
// TODO: better way to handle this
|
|
time.Sleep(500 * time.Millisecond)
|
|
|
|
// TODO: origin
|
|
// CORS for external resources
|
|
app.Use(cors.New(cors.Config{
|
|
AllowOrigins: "*",
|
|
AllowHeaders: "Cache-Control",
|
|
AllowCredentials: true,
|
|
}))
|
|
|
|
app.Get("/", func(c *fiber.Ctx) error {
|
|
c.Set("Content-Type", "text/event-stream")
|
|
c.Set("Cache-Control", "no-cache")
|
|
c.Set("Connection", "keep-alive")
|
|
c.Set("Transfer-Encoding", "chunked")
|
|
|
|
c.Context().SetBodyStreamWriter(fasthttp.StreamWriter(func(w *bufio.Writer) {
|
|
var sseclient structs.SSEClient
|
|
|
|
sseclient.MessageChan = make(chan structs.SSEClientChanMessage)
|
|
|
|
clientId := uuid.New()
|
|
|
|
cache.SSEClients[clientId] = sseclient
|
|
|
|
gocnjhelper.LogDebugf("NEW CLIENT ID: %s", clientId)
|
|
gocnjhelper.LogDebugf("%d CLIENTS CONNECTED", len(cache.SSEClients))
|
|
|
|
for message := range sseclient.MessageChan {
|
|
fmt.Fprintf(w, "data: %s\n\n", message.Message)
|
|
|
|
err := w.Flush()
|
|
|
|
if err != nil {
|
|
// Refreshing page in web browser will establish a new
|
|
// SSE connection, but only (the last) one is alive, so
|
|
// dead connections must be closed here.
|
|
|
|
for id, sseClient := range cache.SSEClients {
|
|
if id == message.ClientId {
|
|
close(sseClient.MessageChan)
|
|
delete(cache.SSEClients, id)
|
|
gocnjhelper.LogDebugf("DELETE clientId: %s", id)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}))
|
|
|
|
return nil
|
|
})
|
|
|
|
cfg := config.Cfg
|
|
|
|
app.Listen(cfg.Host + ":" + cfg.Port)
|
|
}
|