Limit download speed to not kill internet

I assume it's because dead sockets are consuming broadcast messages

.gitignore

@@ -1,3 +1,4 @@
 .idea
 main.exe
 logs.log
+ws-server/deploy.tar

api.go

@@ -1,75 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"log"
-	"net/http"
-)
-
-type APIError struct {
-	Code    int          `json:"code"`
-	Message string       `json:"message"`
-	Data    APIErrorData `json:"data"`
-}
-
-type APIErrorData struct {
-	Link APIErrorLink `json:"link"`
-}
-
-type APIErrorLink struct {
-	Code    string `json:"code"`
-	Message string `json:"message"`
-}
-
-func SetDownloaded(item PBEvent) (err error) {
-	req, err := http.NewRequestWithContext(context.Background(), "PATCH", FULL_URL+"/"+item.Record.Id, nil)
-	if err != nil {
-		log.Printf("Error creating PATCH request: %++v", err)
-		return err
-	}
-	req.Header.Set("Content-Type", "application/json")
-
-	partialItem := new(PBEvent)
-	partialItem.Record = item.Record
-	partialItem.Record.Downloaded = true
-
-	body, err := json.Marshal(partialItem.Record)
-	if err != nil {
-		log.Printf("Error marshalling subscription body: %++v", err)
-		return err
-	}
-	req.Body = io.NopCloser(bytes.NewReader(body))
-
-	client := http.Client{}
-	res, err := client.Do(req)
-	if err != nil {
-		log.Printf("Error sending PATCH request: %++v", err)
-		return err
-	}
-	defer res.Body.Close()
-
-	if res.StatusCode != http.StatusOK {
-		log.Printf("Non-OK HTTP status: %d", res.StatusCode)
-
-		body, err = io.ReadAll(res.Body)
-		if err != nil {
-			log.Printf("Error reading response body: %++v", err)
-			return err
-		}
-		var data APIError
-		err = json.Unmarshal(body, &data)
-		if err != nil {
-			log.Printf("Error unmarshaling JSON: %++v", err)
-			return err
-		}
-
-		log.Printf("API error: %++v", data)
-		return fmt.Errorf("Non-OK HTTP status, err: %++v", data)
-	}
-
-	return nil
-}

build.sh

@@ -1 +0,0 @@
-docker build -t youtube-downloader .

dl/dl.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"sync"
+)
+
+const URL = `https://youtube-download-ws-server.site.quack-lab.dev/download`
+
+type Item struct {
+	Link string `json:"link"`
+}
+
+var wg sync.WaitGroup
+
+func main() {
+	log.SetFlags(log.Lmicroseconds)
+
+	for _, url := range os.Args[1:] {
+		log.Printf("Downloading %s", url)
+		wg.Add(1)
+		go Download(url)
+	}
+	wg.Wait()
+}
+
+func Download(url string) {
+	defer wg.Done()
+
+	req, err := http.NewRequestWithContext(context.Background(), "POST", URL, nil)
+	if err != nil {
+		log.Printf("Error creating POST request: %++v", err)
+		return
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	item := new(Item)
+	item.Link = url
+
+	body, err := json.Marshal(item)
+	if err != nil {
+		log.Printf("Error marshalling subscription body: %++v", err)
+		return
+	}
+	req.Body = io.NopCloser(bytes.NewReader(body))
+
+	client := http.Client{}
+	res, err := client.Do(req)
+	if err != nil {
+		log.Printf("Error sending POST request: %++v", err)
+		return
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode != http.StatusOK {
+		log.Printf("Non-OK HTTP status: %d", res.StatusCode)
+
+		body, err = io.ReadAll(res.Body)
+		if err != nil {
+			log.Printf("Error reading response body: %++v", err)
+			return
+		}
+		return
+	} else {
+		log.Printf("Enqueued %s", url)
+	}
+}

dl/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.22.4

dl/sync

@@ -0,0 +1 @@
+main.exe,"C:\Program Files\Git\usr\bin\dl.exe",t

download.go

@@ -1,33 +0,0 @@
-package main
-
-import (
-	"context"
-	"log"
-
-	"github.com/lrstanley/go-ytdlp"
-)
-
-const OUTPUT_DIR = "C:/Users/Administrator/ytdlpVideos"
-
-var dl = ytdlp.New().
-	// FormatSort("bestvideo[ext=mp4]+bestaudio[ext=m4a]").
-	FormatSort("res,ext:mp4:m4a").
-	Output("C:/Users/Administrator/ytdlpVideos/%(uploader)s/%(title)s.%(ext)s").
-	LimitRate("50M").
-	// HTTPChunkSize("20M").
-	MarkWatched().
-	SponsorblockMark("all").
-	PrintJSON().
-	RecodeVideo("mp4").
-	ConcurrentFragments(4)
-
-func Download(event PBEvent, status chan error) {
-	_, err := dl.Run(context.TODO(), event.Record.Link)
-	if err != nil {
-		status <- err
-		return
-	}
-
-	log.Printf("Downloaded %s (%s)", event.Record.Id, event.Record.Link)
-	SetDownloaded(event)
-}

downloader/api.go

@@ -0,0 +1,75 @@
+package main
+
+// import (
+// 	"bytes"
+// 	"context"
+// 	"encoding/json"
+// 	"fmt"
+// 	"io"
+// 	"log"
+// 	"net/http"
+// )
+
+// type APIError struct {
+// 	Code    int          `json:"code"`
+// 	Message string       `json:"message"`
+// 	Data    APIErrorData `json:"data"`
+// }
+
+// type APIErrorData struct {
+// 	Link APIErrorLink `json:"link"`
+// }
+
+// type APIErrorLink struct {
+// 	Code    string `json:"code"`
+// 	Message string `json:"message"`
+// }
+
+// func SetDownloaded(item PBEvent) (err error) {
+// 	req, err := http.NewRequestWithContext(context.Background(), "PATCH", FULL_URL+"/"+item.Record.Id, nil)
+// 	if err != nil {
+// 		log.Printf("Error creating PATCH request: %++v", err)
+// 		return err
+// 	}
+// 	req.Header.Set("Content-Type", "application/json")
+
+// 	partialItem := new(PBEvent)
+// 	partialItem.Record = item.Record
+// 	partialItem.Record.Downloaded = true
+
+// 	body, err := json.Marshal(partialItem.Record)
+// 	if err != nil {
+// 		log.Printf("Error marshalling subscription body: %++v", err)
+// 		return err
+// 	}
+// 	req.Body = io.NopCloser(bytes.NewReader(body))
+
+// 	client := http.Client{}
+// 	res, err := client.Do(req)
+// 	if err != nil {
+// 		log.Printf("Error sending PATCH request: %++v", err)
+// 		return err
+// 	}
+// 	defer res.Body.Close()
+
+// 	if res.StatusCode != http.StatusOK {
+// 		log.Printf("Non-OK HTTP status: %d", res.StatusCode)
+
+// 		body, err = io.ReadAll(res.Body)
+// 		if err != nil {
+// 			log.Printf("Error reading response body: %++v", err)
+// 			return err
+// 		}
+// 		var data APIError
+// 		err = json.Unmarshal(body, &data)
+// 		if err != nil {
+// 			log.Printf("Error unmarshaling JSON: %++v", err)
+// 			return err
+// 		}
+
+// 		log.Printf("API error: %++v", data)
+// 		return fmt.Errorf("Non-OK HTTP status, err: %++v", data)
+// 	}
+
+// 	return nil
+// }

downloader/build.sh

@@ -0,0 +1,3 @@
+nssm stop YoutubeDownloader && \
+go build main && \
+nssm start YoutubeDownloader

downloader/download.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"context"
+	"log"
+
+	"github.com/lrstanley/go-ytdlp"
+)
+
+const OUTPUT_DIR = "C:/Users/Administrator/ytdlpVideos"
+
+var dl = ytdlp.New().
+	// FormatSort("bestvideo[ext=mp4]+bestaudio[ext=m4a]").
+	FormatSort("res,ext:mp4:m4a").
+	Output("C:/Users/Administrator/ytdlpVideos/%(uploader)s/%(title)s.%(ext)s").
+	LimitRate("5M").
+	// HTTPChunkSize("20M").
+	MarkWatched().
+	SponsorblockMark("all").
+	RecodeVideo("mp4").
+	ConcurrentFragments(6)
+
+// func Download(event PBEvent, status chan error) {
+// 	_, err := dl.Run(context.TODO(), event.Record.Link)
+// 	if err != nil {
+// 		status <- err
+// 		return
+// 	}
+
+// 	log.Printf("Downloaded %s (%s)", event.Record.Id, event.Record.Link)
+// 	SetDownloaded(event)
+// }
+
+func DownloadURL(url string, status chan error) {
+	log.Printf("Downloading %s", url)
+	_, err := dl.Run(context.TODO(), url)
+	if err != nil {
+		status <- err
+		return
+	}
+
+	log.Printf("Downloaded %s", url)	
+	close(status)
+}

downloader/go.mod

@@ -20,4 +20,7 @@ require (
 	gopkg.in/cenkalti/backoff.v1 v1.1.0 // indirect
 )
 
-require github.com/lrstanley/go-ytdlp v0.0.0-20240616011628-f35a10876c99
+require (
+	github.com/gorilla/websocket v1.5.3
+	github.com/lrstanley/go-ytdlp v0.0.0-20240616011628-f35a10876c99
+)

downloader/go.sum

@@ -20,6 +20,8 @@ github.com/dop251/goja_nodejs v0.0.0-20211022123610-8dd9abb0616d/go.mod h1:DngW8
 github.com/go-sourcemap/sourcemap v2.1.3+incompatible/go.mod h1:F8jJfvm2KbVjc5NqelyYJmf/v5J0dwNLS2mL4sNA1Jg=
 github.com/google/pprof v0.0.0-20230207041349-798e818bf904/go.mod h1:uglQLonpP8qtYCYyzA+8c/9qtqgA3qsXGYqCPKARAFg=
 github.com/google/pprof v0.0.0-20240227163752-401108e1b7e7/go.mod h1:czg5+yv1E0ZGTi6S6vVK1mke0fV+FaUhNGcd6VRS9Ik=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/ianlancetaylor/demangle v0.0.0-20220319035150-800ac71e25c2/go.mod h1:aYm2/VgdVmcIU8iMfdMvDMsRAQjcfZSKFby6HOFvi/w=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=

downloader/main.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"log"
+	"time"
+)
+
+const WEBSOCKET_SERVER = "ws://youtube-download-ws-server.site.quack-lab.dev/ws"
+const WEBSOCKET_SERVER_ALT = "ws://localhost:8080/ws"
+
+func main() {
+	log.SetFlags(log.Lmicroseconds)
+
+	// res, err := http.Get(FULL_URL)
+	// if err != nil {
+	// 	log.Fatal(err)
+	// }
+	// defer res.Body.Close()
+	// body, err := io.ReadAll(res.Body)
+	// if err != nil {
+	// 	log.Printf("Error reading response body: %+v\n", err)
+	// 	return
+	// }
+	// if res.StatusCode != http.StatusOK {
+	// 	log.Printf("Non-OK HTTP status: %d\nResponse body: %s\n", res.StatusCode, body)
+	// 	return
+	// }
+
+	// var data APIResponse
+	// err = json.Unmarshal(body, &data)
+	// if err != nil {
+	// 	log.Printf("Error unmarshaling JSON: %+v\n", err)
+	// 	return
+	// }
+	// log.Printf("Data: %+v\n", data)
+
+	// listener := new(RealtimeListener)
+	// listener.Url = POCKETBASE_REALTIME
+	// listener.Collections = []string{COLLECTION_NAME}
+	// listener.initialize()
+
+	ws := new(WSConnection)
+	ws.url = WEBSOCKET_SERVER
+	ws.Open()
+
+	sem := make(chan struct{}, 4)
+	for {
+		select {
+		case event := <-ws.ReadChan:
+			eventCopy := event
+			status := make(chan error)
+			sem <- struct{}{}
+			
+			log.Printf("New event: %+v; semaphore at: %d", eventCopy, len(sem))
+			go func() {
+				defer func() {
+					<-sem
+					log.Printf("Semaphore at: %d", len(sem))
+				}()
+				// Download(eventCopy, status)
+				DownloadURL(eventCopy, status)
+				// go DownloadNative(event, status)
+				for status := range status {
+					log.Printf("Status: %s\n", status)
+				}
+			}()
+		case <-time.After(1 * time.Minute):
+			// Perform some action or simply continue to avoid deadlock
+			log.Println("Consumer is alive, but has no new events.")
+		}
+	}
+}

downloader/realtime.go

@@ -0,0 +1,89 @@
+package main
+
+// import (
+// 	"bytes"
+// 	"encoding/json"
+// 	"log"
+// 	"net/http"
+
+// 	"github.com/r3labs/sse"
+// )
+
+// type RealtimeListener struct {
+// 	Url         string
+// 	Collections []string
+// 	Create      chan PBEvent
+// 	Update      chan PBEvent
+// 	Delete      chan PBEvent
+// 	client      *sse.Client
+// }
+
+// type Subscription struct {
+// 	ClientId      string   `json:"clientId"`
+// 	Subscriptions []string `json:"subscriptions"`
+// }
+
+// func (listener RealtimeListener) handlePbEvent(msg *sse.Event) {
+// 	pbEvent := new(PBEvent)
+// 	err := json.Unmarshal(msg.Data, &pbEvent)
+// 	if err != nil {
+// 		log.Printf("Error unmarshalling event: %v\n", err)
+// 		return
+// 	}
+// 	log.Printf("Received event: %++v", pbEvent)
+
+// 	if pbEvent.ClientId != "" {
+// 		listener.doSubscribe(pbEvent.ClientId)
+// 	}
+
+// 	if pbEvent.Action != "" {
+// 		go listener.shipEvent(*pbEvent)
+// 	}
+// }
+
+// func (listener RealtimeListener) shipEvent(event PBEvent) {
+// 	switch event.Action {
+// 	case "create":
+// 		listener.Create <- event
+// 	case "update":
+// 		listener.Update <- event
+// 	case "delete":
+// 		listener.Delete <- event
+// 	default:
+// 		log.Printf("Unknown action: %v\n", event.Action)
+// 	}
+// }
+
+// func (listener RealtimeListener) doSubscribe(clientId string) {
+// 	subscription := Subscription{
+// 		ClientId:      clientId,
+// 		Subscriptions: listener.Collections,
+// 	}
+// 	log.Printf("Subscribing client: %v to %++v", clientId, subscription)
+
+// 	body, err := json.Marshal(subscription)
+// 	if err != nil {
+// 		log.Printf("Error marshalling subscription body: %v\n", err)
+// 		return
+// 	}
+
+// 	resp, err := http.Post(POCKETBASE_REALTIME, "application/json", bytes.NewBuffer(body))
+// 	if err != nil {
+// 		log.Printf("Error posting subscription: %v\n", err)
+// 		return
+// 	}
+// 	defer resp.Body.Close()
+
+// 	if resp.StatusCode != http.StatusNoContent {
+// 		log.Printf("Subscription request failed with status: %v\n", resp.Status)
+// 	}
+// }
+
+// func (listener *RealtimeListener) initialize() {
+// 	listener.Update = make(chan PBEvent, 32)
+// 	listener.Create = make(chan PBEvent, 32)
+// 	listener.Delete = make(chan PBEvent, 32)
+// 	log.Print("Initialized")
+// 	listener.client = sse.NewClient(listener.Url)
+// 	go listener.client.Subscribe("", listener.handlePbEvent)
+// }

downloader/ws-client.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"log"
+	"sync"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+const TIMEOUT = 6
+const IDLE_TIMEOUT = TIMEOUT * time.Second
+const PING_INTERVAL = (TIMEOUT / 2) * time.Second
+
+type WSConnection struct {
+	url       string
+	conn      *websocket.Conn
+	errChan   chan error
+	writeLock sync.Mutex
+	ReadChan  chan string
+	WriteChan chan string
+}
+
+func (ws *WSConnection) messageReader() {
+	log.Printf("Reading messages")
+	for {
+		_, message, err := ws.conn.ReadMessage()
+		ws.conn.SetReadDeadline(time.Now().Add(IDLE_TIMEOUT))
+		if err != nil {
+			ws.errChan <- err
+			return
+		}
+		log.Printf("Received: %s, %d in output channel", message, len(ws.ReadChan))
+		ws.ReadChan <- string(message)
+	}
+}
+
+func (ws *WSConnection) messageSender() {
+	log.Printf("Sending messages")
+	for {
+		msg := <-ws.WriteChan
+		ws.writeLock.Lock()
+		
+		ws.conn.SetWriteDeadline(time.Now().Add(IDLE_TIMEOUT))
+		log.Printf("Sending: %s, %d in input channel", msg, len(ws.WriteChan))
+		err := ws.conn.WriteMessage(websocket.TextMessage, []byte(msg))
+		if err != nil {
+			log.Printf("Error during message writing: %v", err)
+			ws.errChan <- err
+			return
+		}
+		ws.writeLock.Unlock()
+	}
+}
+
+func (ws *WSConnection) pinger() {
+	log.Printf("Starting pinger, sleeping for %v", PING_INTERVAL)
+	for {
+		time.Sleep(PING_INTERVAL)
+
+		log.Printf("Ping")
+		ws.writeLock.Lock()
+		err := ws.conn.WriteMessage(websocket.PingMessage, nil)
+		if err != nil {
+			log.Println("Error during ping:", err)
+			ws.errChan <- err
+			return
+		}
+		ws.writeLock.Unlock()
+	}
+}
+
+func (ws *WSConnection) handleError() {
+	for {
+		err := <-ws.errChan
+		log.Println("Error during message reading:", err)
+
+		time.Sleep(5 * time.Second)
+		ws.Open()
+	}
+}
+
+func (ws *WSConnection) Open() {
+	log.Printf("Connecting to %s", ws.url)
+	conn, _, err := websocket.DefaultDialer.Dial(ws.url, nil)
+	if err != nil {
+		log.Println("Error during connection:", err)
+		ws.errChan <- err
+		return
+	}
+	log.Printf("Connected")
+	ws.conn = conn
+	ws.errChan = make(chan error)
+	ws.ReadChan = make(chan string, 1024)
+	ws.WriteChan = make(chan string, 1024)
+
+	ws.conn.SetReadLimit(1024)
+	ws.conn.SetReadDeadline(time.Now().Add(IDLE_TIMEOUT))
+	ws.conn.SetWriteDeadline(time.Now().Add(IDLE_TIMEOUT))
+	ws.conn.SetPongHandler(func(string) error {
+		log.Println("Pong")
+		ws.conn.SetReadDeadline(time.Now().Add(IDLE_TIMEOUT))
+		ws.conn.SetWriteDeadline(time.Now().Add(IDLE_TIMEOUT))
+		return nil
+	})
+
+	go ws.messageReader()
+	go ws.messageSender()
+	go ws.handleError()
+	go ws.pinger()
+}

main.go

@@ -1,62 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"io"
-	"log"
-	"net/http"
-	"time"
-)
-
-const POCKETBASE_URL = `https://pocketbase-scratch.site.quack-lab.dev/api/collections`
-const POCKETBASE_REALTIME = `https://pocketbase-scratch.site.quack-lab.dev/api/realtime`
-const COLLECTION_NAME = "youtubedownload"
-const FULL_URL = POCKETBASE_URL + "/" + COLLECTION_NAME + "/records"
-
-func main() {
-	log.SetFlags(log.Lmicroseconds)
-	log.Println(FULL_URL)
-
-	res, err := http.Get(FULL_URL)
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer res.Body.Close()
-	body, err := io.ReadAll(res.Body)
-	if err != nil {
-		log.Printf("Error reading response body: %+v\n", err)
-		return
-	}
-	if res.StatusCode != http.StatusOK {
-		log.Printf("Non-OK HTTP status: %d\nResponse body: %s\n", res.StatusCode, body)
-		return
-	}
-
-	var data APIResponse
-	err = json.Unmarshal(body, &data)
-	if err != nil {
-		log.Printf("Error unmarshaling JSON: %+v\n", err)
-		return
-	}
-	// log.Printf("Data: %+v\n", data)
-
-	listener := new(RealtimeListener)
-	listener.Url = POCKETBASE_REALTIME
-	listener.Collections = []string{COLLECTION_NAME}
-	listener.initialize()
-
-	status := make(chan error)
-	for event := range listener.Create {
-		log.Printf("Create event: %+v\n", event)
-		eventCopy := event
-		go func() {
-			Download(eventCopy, status)
-			// go DownloadNative(event, status)
-			for status := range status {
-				log.Printf("Status: %s\n", status)
-			}
-		}()
-	}
-
-	time.Sleep(1 * time.Hour)
-}

realtime.go

@@ -1,87 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"encoding/json"
-	"log"
-	"net/http"
-
-	"github.com/r3labs/sse"
-)
-
-type RealtimeListener struct {
-	Url         string
-	Collections []string
-	Create      chan PBEvent
-	Update      chan PBEvent
-	Delete      chan PBEvent
-	client      *sse.Client
-}
-
-type Subscription struct {
-	ClientId      string   `json:"clientId"`
-	Subscriptions []string `json:"subscriptions"`
-}
-
-func (listener RealtimeListener) handlePbEvent(msg *sse.Event) {
-	var pbEvent = new(PBEvent)
-	err := json.Unmarshal(msg.Data, &pbEvent)
-	if err != nil {
-		log.Printf("Error unmarshalling event: %v\n", err)
-		return
-	}
-
-	if pbEvent.ClientId != "" {
-		listener.doSubscribe(pbEvent.ClientId)
-	}
-
-	if pbEvent.Action != "" {
-		go listener.shipEvent(*pbEvent)
-	}
-}
-
-func (listener RealtimeListener) shipEvent(event PBEvent) {
-	switch event.Action {
-	case "create":
-		listener.Create <- event
-	case "update":
-		listener.Update <- event
-	case "delete":
-		listener.Delete <- event
-	default:
-		log.Printf("Unknown action: %v\n", event.Action)
-	}
-}
-
-func (listener RealtimeListener) doSubscribe(clientId string) {
-	subscription := Subscription{
-		ClientId:      clientId,
-		Subscriptions: listener.Collections,
-	}
-
-	body, err := json.Marshal(subscription)
-	if err != nil {
-		log.Printf("Error marshalling subscription body: %v\n", err)
-		return
-	}
-
-	resp, err := http.Post(POCKETBASE_REALTIME, "application/json", bytes.NewBuffer(body))
-	if err != nil {
-		log.Printf("Error posting subscription: %v\n", err)
-		return
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode != http.StatusNoContent {
-		log.Printf("Subscription request failed with status: %v\n", resp.Status)
-	}
-}
-
-func (listener *RealtimeListener) initialize() {
-	listener.Update = make(chan PBEvent, 32)
-	listener.Create = make(chan PBEvent, 32)
-	listener.Delete = make(chan PBEvent, 32)
-	log.Print("initialized")
-	listener.client = sse.NewClient(listener.Url)
-	go listener.client.Subscribe("", listener.handlePbEvent)
-}

tampermonkey.js

@@ -0,0 +1,86 @@
+// ==UserScript==
+// @name            Youtube Downloader
+// @author          Cyka
+// @match           https://www.youtube.com/*
+// @version         1.19
+// @run-at          document-idle
+// @noframes
+// ==/UserScript==
+
+const URL = `https://youtube-download-ws-server.site.quack-lab.dev/download`;
+
+function waitForElement(element, selector) {
+	return new Promise((resolve) => {
+		if (element.querySelector(selector)) {
+			return resolve(element.querySelector(selector));
+		}
+
+		const observer = new MutationObserver((mutations) => {
+			if (element.querySelector(selector)) {
+				resolve(element.querySelector(selector));
+				observer.disconnect();
+			}
+		});
+
+		observer.observe(element, {
+			childList: true,
+			subtree: true,
+		});
+	});
+}
+
+function parseVideo(videoElement) {
+	hookVideo(videoElement);
+}
+
+function hookVideo(videoElement) {
+	videoElement.addEventListener(
+		"mousedown",
+		function (e) {
+			if (e.button === 1) {
+				e.preventDefault();
+				e.stopPropagation();
+				e.stopImmediatePropagation();
+
+				const link = videoElement.querySelector("a#video-title-link").href;
+				console.log(link);
+				fetch(URL, {
+					method: "POST",
+					headers: {
+						"Content-Type": "application/json",
+					},
+					body: JSON.stringify({
+						link: link,
+					}),
+				}).then((res) => {
+					console.log(res);
+					res.json().then((data) => console.log(data));
+				});
+			}
+		},
+		false
+	);
+}
+
+async function main() {
+	const videosContainer = await waitForElement(document, "div#contents.style-scope.ytd-rich-grid-renderer");
+
+	for (const video of videosContainer.querySelectorAll("ytd-rich-item-renderer")) {
+		parseVideo(video);
+	}
+
+	new MutationObserver((mutations) => {
+		mutations = mutations.filter((mutation) => mutation.addedNodes.length > 0);
+
+		for (const mutation of mutations) {
+			if (mutation.target.tagName == "YTD-RICH-ITEM-RENDERER") {
+				parseVideo(mutation.target);
+			}
+		}
+	}).observe(videosContainer, {
+		childList: true,
+		subtree: true,
+	});
+}
+
+main();

ws-client/go.mod

@@ -0,0 +1,5 @@
+module main
+
+go 1.22.4
+
+require github.com/gorilla/websocket v1.5.3

ws-client/go.sum

@@ -0,0 +1,2 @@
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=

ws-client/main.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"log"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+type WSConnection struct {
+	url     string
+	conn    *websocket.Conn
+	errChan chan error
+}
+
+func (ws *WSConnection) readMessage() {
+	log.Printf("Reading messages")
+	for {
+		_, message, err := ws.conn.ReadMessage()
+		if err != nil {
+			ws.errChan <- err
+			return
+		}
+		log.Printf("Received: %s", message)
+	}
+}
+
+func (ws *WSConnection) writeMessage(message string) {
+	err := ws.conn.WriteMessage(websocket.TextMessage, []byte(message))
+	if err != nil {
+		log.Printf("Error during message writing: %v", err)
+		ws.errChan <- err
+		return
+	}
+}
+
+func (ws *WSConnection) handleError() {
+	for {
+		err := <-ws.errChan
+		log.Println("Error during message reading:", err)
+
+		time.Sleep(5 * time.Second)
+		ws.open()
+	}
+}
+
+func (ws *WSConnection) open() {
+	log.Printf("Connecting to %s", ws.url)
+	conn, _, err := websocket.DefaultDialer.Dial(ws.url, nil)
+	if err != nil {
+		log.Println("Error during connection:", err)
+		ws.errChan <- err
+		return
+	}
+	log.Printf("Connected")
+	ws.conn = conn
+	ws.errChan = make(chan error)
+	go ws.readMessage()
+	go ws.handleError()
+}
+
+func main() {
+	log.SetFlags(log.Lmicroseconds)
+
+	wsConn := WSConnection{
+		url: "ws://localhost:8080/ws",
+	}
+	wsConn.open()
+	for {
+		log.Printf("zzz...")
+		time.Sleep(30 * time.Second)
+	}
+}

ws-server/build.sh

@@ -0,0 +1,3 @@
+# docker build -t youtube-download-ws-server .
+
+tar -cf deploy.tar captain-definition dockerfile main.go go.mod go.sum

ws-server/captain-definition

@@ -0,0 +1,4 @@
+{
+  "schemaVersion": 2,
+  "dockerfilePath": "./dockerfile"
+}

ws-server/dockerfile

@@ -0,0 +1,21 @@
+FROM golang:1.22.4 as base
+
+WORKDIR $GOPATH/src/app/
+
+COPY . .
+
+RUN go mod download
+RUN go mod verify
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /main .
+
+FROM scratch
+
+COPY --from=base /usr/share/zoneinfo /usr/share/zoneinfo
+COPY --from=base /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=base /etc/passwd /etc/passwd
+COPY --from=base /etc/group /etc/group
+
+COPY --from=base /main .
+
+CMD ["/main"]

ws-server/go.mod

@@ -0,0 +1,5 @@
+module main
+
+go 1.22.4
+
+require github.com/gorilla/websocket v1.5.3

ws-server/go.sum

@@ -0,0 +1,2 @@
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=

ws-server/main.go

@@ -0,0 +1,169 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+var upgrader = websocket.Upgrader{}
+var wsBroadcast = make(chan string, 128)
+var connections = make(map[*WSConnection]bool)
+
+const TIMEOUT = 6
+const IDLE_TIMEOUT = TIMEOUT * time.Second
+const PING_INTERVAL = (TIMEOUT / 2) * time.Second
+
+type WSConnection struct {
+	conn      *websocket.Conn
+	writeLock sync.Mutex
+	ReadChan  chan string
+	WriteChan chan string
+	ErrorChan chan error
+}
+
+func (ws *WSConnection) messageReader() {
+	log.Printf("Reading messages")
+	for {
+		_, message, err := ws.conn.ReadMessage()
+		ws.conn.SetReadDeadline(time.Now().Add(IDLE_TIMEOUT))
+		if err != nil {
+			ws.ErrorChan <- err
+			return
+		}
+		log.Printf("Received: %s, %d in output channel", message, len(ws.ReadChan))
+		ws.ReadChan <- string(message)
+	}
+}
+
+func (ws *WSConnection) messageSender() {
+	log.Printf("Sending messages")
+	for {
+		msg := <-ws.WriteChan
+		ws.writeLock.Lock()
+
+		ws.conn.SetWriteDeadline(time.Now().Add(IDLE_TIMEOUT))
+		log.Printf("Sending: %s, %d in input channel", msg, len(ws.WriteChan))
+		err := ws.conn.WriteMessage(websocket.TextMessage, []byte(msg))
+		if err != nil {
+			log.Printf("Error during message writing: %v", err)
+			ws.ErrorChan <- err
+			return
+		}
+		ws.writeLock.Unlock()
+	}
+}
+
+func (ws *WSConnection) pinger() {
+	log.Printf("Starting pinger, sleeping for %v", PING_INTERVAL)
+	for {
+		time.Sleep(PING_INTERVAL)
+
+		log.Printf("Ping")
+		ws.writeLock.Lock()
+		err := ws.conn.WriteMessage(websocket.PingMessage, nil)
+		if err != nil {
+			log.Println("Error during ping:", err)
+			ws.ErrorChan <- err
+			return
+		}
+		ws.writeLock.Unlock()
+	}
+}
+
+func (ws *WSConnection) Open() {
+	log.Printf("Client connected")
+	ws.ReadChan = make(chan string, 1024)
+	ws.WriteChan = make(chan string, 1024)
+	ws.ErrorChan = make(chan error, 16)
+
+	ws.conn.SetReadLimit(1024)
+	ws.conn.SetReadDeadline(time.Now().Add(IDLE_TIMEOUT))
+	ws.conn.SetWriteDeadline(time.Now().Add(IDLE_TIMEOUT))
+	ws.conn.SetPongHandler(func(string) error {
+		log.Println("Pong")
+		ws.conn.SetReadDeadline(time.Now().Add(IDLE_TIMEOUT))
+		ws.conn.SetWriteDeadline(time.Now().Add(IDLE_TIMEOUT))
+		return nil
+	})
+
+	connections[ws] = true
+
+	go ws.messageReader()
+	go ws.messageSender()
+	go ws.pinger()
+	go func() {
+		for {
+			select {
+			case err := <-ws.ErrorChan:
+				log.Printf("Error: %v", err)
+				ws.conn.Close()
+				log.Printf("Client disconnected")
+				connections[ws] = false
+				return
+			// case msg := <-wsBroadcast:
+			// 	ws.WriteChan <- msg
+			}
+		}
+	}()
+}
+
+func wsHandler(responseWriter http.ResponseWriter, request *http.Request) {
+	conn, err := upgrader.Upgrade(responseWriter, request, nil)
+	if err != nil {
+		fmt.Println("Error during connection upgrade:", err)
+		return
+	}
+
+	ws := new(WSConnection)
+	ws.conn = conn
+	ws.Open()
+}
+
+type DownloadReq struct {
+	Link string `json:"link"`
+}
+
+func handleDownload(responseWriter http.ResponseWriter, request *http.Request) {
+	body, err := io.ReadAll(request.Body)
+	if err != nil {
+		log.Printf("Error reading request body: %v", err)
+		http.Error(responseWriter, "Error reading request body", http.StatusBadRequest)
+		return
+	}
+	defer request.Body.Close()
+
+	req := DownloadReq{}
+	err = json.Unmarshal(body, &req)
+	if err != nil {
+		log.Printf("Error parsing JSON: %v", err)
+		http.Error(responseWriter, "Error parsing JSON", http.StatusBadRequest)
+		return
+	}
+
+	log.Printf("Received download request: %s, %d in channel", req.Link, len(wsBroadcast))
+	go func() {
+		for ws := range connections {
+			ws.WriteChan <- req.Link
+		}
+	}()
+	// wsBroadcast <- req.Link
+}
+
+func main() {
+	log.SetFlags(log.Lmicroseconds)
+
+	http.HandleFunc("/ws", wsHandler)
+	http.HandleFunc("/download", handleDownload)
+	log.Println("Server starting on :8080")
+	err := http.ListenAndServe(":8080", nil)
+	if err != nil {
+		log.Println("Error starting server:", err)
+	}
+}