mirror of https://github.com/JustKato/FreePad.git
* Branch reset
This commit is contained in:
parent
cfe2c06dac
commit
0a1bff5cd4
1
go.mod
1
go.mod
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@ -4,6 +4,7 @@ go 1.15
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require (
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github.com/gin-gonic/gin v1.7.7
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github.com/google/uuid v1.3.0 // indirect
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github.com/gorilla/websocket v1.5.0 // indirect
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github.com/joho/godotenv v1.4.0
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github.com/mrz1836/go-sanitize v1.1.5
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2
go.sum
2
go.sum
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@ -38,6 +38,8 @@ github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
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github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
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github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
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github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
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github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
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github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
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@ -4,17 +4,22 @@ import (
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"github.com/JustKato/FreePad/lib/objects"
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"github.com/gin-gonic/gin"
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"github.com/google/uuid"
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"github.com/gorilla/websocket"
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)
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var wsUpgrader = websocket.Upgrader{
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ReadBufferSize: 1024,
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WriteBufferSize: 1024,
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ReadBufferSize: 1024, // TODO: Make it configurable via the .env file
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WriteBufferSize: 1024, // TODO: Make it configurable via the .env file
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}
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// The pad socket map caches all of the existing sockets
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var padSocketMap map[string]map[string]*websocket.Conn = make(map[string]map[string]*websocket.Conn)
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// TODO: Use generics so that we can take string messages, that'd be nice!
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type SocketMessage struct {
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EventType string `json:"eventType"`
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PadName string `json:"padName"`
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@ -24,32 +29,55 @@ type SocketMessage struct {
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// Bind the websockets to the gin router
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func BindSocket(router *gin.RouterGroup) {
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router.GET("/get", func(ctx *gin.Context) {
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webSocketUpgrade(ctx.Writer, ctx.Request)
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router.GET("/get/:pad", func(ctx *gin.Context) {
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// Get the name of the pad to assign to this socket
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padName := ctx.Param("pad")
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// Upgrade the socket connection
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webSocketUpgrade(ctx, padName)
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})
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}
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func webSocketUpgrade(w http.ResponseWriter, r *http.Request) {
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conn, err := wsUpgrader.Upgrade(w, r, nil)
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func webSocketUpgrade(ctx *gin.Context, padName string) {
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conn, err := wsUpgrader.Upgrade(ctx.Writer, ctx.Request, ctx.Request.Header)
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if err != nil {
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fmt.Printf("Failed to set websocket upgrade: %v\n", err)
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return
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}
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// Check if we have any sockets in this padName
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if _, ok := padSocketMap[padName]; !ok {
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// Initialize a new map of sockets
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padSocketMap[padName] = make(map[string]*websocket.Conn)
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}
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// Give this socket a token
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socketToken := uuid.NewString()
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// Set the current connection at the socket Token position
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padSocketMap[padName][socketToken] = conn
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// Somone just connected
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UpdatePadStatus(padName)
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// Start listening to this socket
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for {
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// Try Read the JSON input from the socket
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_, msg, err := conn.ReadMessage()
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// Check if a close request was sent
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if errors.Is(err, websocket.ErrCloseSent) {
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// Check if anything but a read limit was created
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if err != nil && !errors.Is(err, websocket.ErrReadLimit) {
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// Remove self from the cache
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delete(padSocketMap[padName], socketToken)
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// Somone just disconnected
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UpdatePadStatus(padName)
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break
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}
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if err != nil {
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// There has been an error reading the message
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fmt.Println("Failed to read from the socket")
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fmt.Println("Failed to read from the socket but probably still connected")
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// Skip this cycle
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continue
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}
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@ -66,19 +94,104 @@ func webSocketUpgrade(w http.ResponseWriter, r *http.Request) {
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}
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// Pass the message to the proper handlers
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handleSocketMessage(p)
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handleSocketMessage(p, socketToken, padName)
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}
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}
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// Handle the socket's message
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func handleSocketMessage(msg SocketMessage) {
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func handleSocketMessage(msg SocketMessage, socketToken string, padName string) {
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// Check the type of message
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fmt.Println(msg.EventType)
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// Check if this is a pad Update
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if msg.EventType == `padUpdate` {
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handlePadUpdate(msg, socketToken, padName)
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// Serialize the message
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serialized, err := json.Marshal(msg)
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// Check if there was an error
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if err != nil {
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fmt.Println(`Failed to broadcast the padUpdate`, err)
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// Stop the execution
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return
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}
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// Alert all the other pads other than this one.
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for k, pad := range padSocketMap[padName] {
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// Check if this is the same socket.
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if k == socketToken {
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// Skip self
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continue
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}
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// Send the message to the others.
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pad.WriteMessage(websocket.TextMessage, serialized)
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}
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}
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}
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func BroadcastMessage(padName string, message string) {
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func handlePadUpdate(msg SocketMessage, socketToken string, padName string) {
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// Check if the msg content is valid
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if _, ok := msg.Message[`content`]; !ok {
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fmt.Printf("Failed to update pad %s, invalid message\n", padName)
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return
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}
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// Check that the content is string
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newPadContent, ok := msg.Message[`content`].(string)
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if !ok {
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fmt.Printf("Type assertion failed for %s, invalid message\n", padName)
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return
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}
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// Get the pad
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pad := objects.GetPost(padName, false)
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// Update the pad contents
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pad.Content = newPadContent
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// Save to file
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objects.WritePost(pad)
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}
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// Update the current users of the pad about the amount of live viewers.
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func UpdatePadStatus(padName string) {
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// Grab info about the map's key
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sockets, ok := padSocketMap[padName]
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// Check if the pad is set and has sockets connected.
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if !ok || len(sockets) < 1 {
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// Quit
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return
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}
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// Generate the message
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msg := SocketMessage{
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EventType: `statusUpdate`,
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PadName: padName,
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Message: gin.H{
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// Send the current amount of live viewers
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"currentViewers": len(sockets),
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},
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}
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BroadcastMessage(padName, msg)
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}
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func BroadcastMessage(padName string, msg SocketMessage) {
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// Grab info about the map's key
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sockets, ok := padSocketMap[padName]
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// Check if the pad is set and has sockets connected.
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if !ok || len(sockets) < 1 {
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// Quit
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return
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}
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// Get all the participants of the pad group
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for _, s := range sockets {
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// Send the message to the socket
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s.WriteJSON(msg)
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}
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}
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@ -45,6 +45,24 @@ main#main-card {
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tab-size: 2;
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font-family: 'Roboto Mono', monospace !important;
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padding-top: 2rem;
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}
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#padTitle {
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padding: .3rem .75rem !important;
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border-radius: .25rem;
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display: inline-block;
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}
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.dark #padTitle {
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color: #db3384;
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background-color: rgba(0, 0, 0, 0.10);
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}
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.light #padTitle {
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color: #555273;
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border: 1px solid rgba(0, 0, 0, 0.15);
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}
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#pad-content-area {
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@ -54,11 +72,16 @@ main#main-card {
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flex-flow: column;
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}
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.light .edit-content-text {
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color: white !important;
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}
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.edit-content-text {
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display: none;
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}
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.read-only-content .edit-content-text {
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margin-top: 1rem;
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display: block !important;
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}
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@ -78,6 +101,9 @@ main#main-card {
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max-height: calc(17rem + 30vh);
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min-height: 17rem;
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overflow: auto;
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padding-top: 2rem;
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margin-top: 1rem;
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}
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textarea:focus,
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@ -138,7 +138,10 @@ function renderArchivesSelection() {
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let resp = confirm("Load contents of pad from memory? This will overwrite the current pad for everyone.");
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if (!!resp) {
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document.getElementById(`pad-content`).value = a.content;
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// Update visually for the client
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updatePadContent(a.content);
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// Send the update
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window.socket.sendPadUpdate();
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}
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})
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@ -210,6 +213,8 @@ function setTextareaPreview(t = true) {
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padContentArea.classList.add(`read-only-content`);
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prev.scrollTop = prev.scrollHeight;
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textarea.classList.add(`hidden`);
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} else {
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// Toggle edit mode
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212
static/js/ws.js
212
static/js/ws.js
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@ -1,8 +1,24 @@
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class PadSocket {
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/**
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* @type {WebSocket}
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*/
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ws = null;
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/**
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* @type {String}
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*/
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padName = null;
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state = null;
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/**
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* The actual textarea you write in
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* @type {HTMLTextAreaElement}
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*/
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padContents = null;
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/**
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* The <code> of the preview
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* @type {HTMLElement}
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*/
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padPreview = null;
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/**
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* Create a new PadSocket
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@ -10,26 +26,45 @@ class PadSocket {
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* @param {string} connUrl The URL to the websocket
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*/
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constructor(padName, connUrl = null) {
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// Assign the pad name
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this.padName = padName;
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// Check if a connection URL was mentioned
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if ( connUrl == null ) {
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let connProtocol = `ws://`;
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if ( window.location.protocol == `https:` ) {
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connProtocol = `wss://`;
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}
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// Try and connect to the local websocket
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connUrl = `ws://` + window.location.host + "/ws/get";
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connUrl = connProtocol + window.location.host + `/ws/get/${padName}`;
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}
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// Connect to the websocket
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const ws = new WebSocket(connUrl);
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ws.onopen = () => {
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this.state = 'active';
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}
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// Bind the onMessage function
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ws.onmessage = this.handleMessage;
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ws.onopen = () => {
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updateStatus(`Established`, `text-success`);
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}
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function onFail() {
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updateStatus(`Connection Failed`, `text-dangerous`);
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}
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// Try and reconnect on failure
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ws.onclose = onFail;
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ws.onerror = onFail;
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// Assign the websocket
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this.ws = ws;
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// Assign the pad name
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this.padName = padName;
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// Get all relevant references from the HTML
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this.padContents = document.getElementById(`pad-content`);
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this.padPreview = document.getElementById(`textarea-preview`);
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}
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/**
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@ -39,18 +74,19 @@ class PadSocket {
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*/
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sendMessage = (eventType, message) => {
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||||
if ( this.state != 'active' ) {
|
||||
if ( this.ws.readyState !== WebSocket.OPEN ) {
|
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throw new Error(`The websocket connection is not active`);
|
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}
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|
||||
// Check if the message is a string
|
||||
if ( typeof message == 'string' ) {
|
||||
if ( typeof message !== 'object' ) {
|
||||
// Convert the message into a map[string]interface{}
|
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message = {
|
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"message": message,
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};
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}
|
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|
||||
// TODO: Compress the message, usually we will be sending the whole body of the pad from the client to the server or vice-versa.
|
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this.ws.send( JSON.stringify({
|
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eventType,
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padName: this.padName,
|
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|
|
@ -59,13 +95,167 @@ class PadSocket {
|
|||
|
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}
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|
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/**
|
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* Handle the message from the socket based on the message type
|
||||
* @param {MessageEvent} e The websocket message
|
||||
*/
|
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handleMessage = ev => {
|
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console.log(ev);
|
||||
updateStatus(`Catching Message`, `text-white`);
|
||||
|
||||
// Check if the message has valid data
|
||||
if ( !!ev.data ) {
|
||||
// Try and parse the data
|
||||
let parsedData = null;
|
||||
|
||||
try {
|
||||
parsedData = JSON.parse(ev.data);
|
||||
} catch ( err ) {
|
||||
console.error(`Failed to parse the WebSocket data`,err);
|
||||
updateStatus(`Parse Fail`, `text-warning`);
|
||||
}
|
||||
|
||||
if ( !!!parsedData['message'] ) {
|
||||
console.error(`Failed to find the message`)
|
||||
updateStatus(`Message Fail`, `text-warning`);
|
||||
return;
|
||||
}
|
||||
|
||||
// Check if this is a pad Content Update
|
||||
if ( parsedData['eventType'] === `padUpdate`) {
|
||||
// Pass on the parsed data
|
||||
this.onPadUpdate(parsedData);
|
||||
} // Check if this is a pad Status Update
|
||||
else if ( parsedData['eventType'] === `statusUpdate`) {
|
||||
// Pass on the parsed data
|
||||
this.onStatusUpdate(parsedData);
|
||||
}
|
||||
|
||||
updateStatus(`Established`, `text-success`);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Whenever a pad update is trigered, run this function
|
||||
* @param {Object} The response from the server
|
||||
*/
|
||||
onPadUpdate = data => {
|
||||
// Check that the content is clear
|
||||
if ( !!data['message']['content'] ) {
|
||||
// Send over the new content to be updated.
|
||||
updatePadContent(data['message']['content']);
|
||||
}
|
||||
}
|
||||
|
||||
onStatusUpdate = data => {
|
||||
// Check that the content is clear
|
||||
if ( !!data['message']['currentViewers'] ) {
|
||||
// Get the amount of viewers reported by the server
|
||||
const viewerCount = Number(data['message']['currentViewers']);
|
||||
// Check if this is a valid number
|
||||
if ( Number.isNaN(viewerCount) ) {
|
||||
// Looks like this is a malformed message
|
||||
return console.error(`Malformed Message`, data);
|
||||
}
|
||||
|
||||
// Send over the new content to be updated.
|
||||
updatePadViewers(viewerCount);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Sending a pad update for each keystroke to the server.
|
||||
* @param {String} msg The new contents of the pad
|
||||
*/
|
||||
sendPadUpdate = msg => {
|
||||
// Get the contents of the pad
|
||||
const padContents = this.padContents.value;
|
||||
|
||||
// Send the data over the webSocket
|
||||
this.sendMessage(`padUpdate`, {
|
||||
"content": padContents,
|
||||
});
|
||||
|
||||
updatePadContent(padContents, false);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Update the contents of the pad
|
||||
* @param {String} newContent
|
||||
*/
|
||||
function updatePadContent(newContent, textArea = true) {
|
||||
// Update the textarea
|
||||
if ( textArea ) {
|
||||
document.getElementById(`pad-content`).value = newContent;
|
||||
}
|
||||
|
||||
// Update the preview
|
||||
const prev = document.getElementById(`textarea-preview`);
|
||||
const shouldScroll = prev.scrollTop >= (prev.scrollHeight - Number(getComputedStyle(prev).height.replace(/px/g, ''))) * 0.98;
|
||||
|
||||
prev.innerHTML = escapeHtml(newContent);
|
||||
|
||||
prev.classList.remove(`language-undefined`);
|
||||
|
||||
prev.classList.forEach( c => {
|
||||
if ( c.indexOf(`language-`) != -1 ) {
|
||||
prev.classList.remove(c);
|
||||
}
|
||||
})
|
||||
|
||||
try { // highlights
|
||||
hljs.highlightElement(document.getElementById(`textarea-preview`));
|
||||
} catch ( err ) {
|
||||
console.err(err);
|
||||
}
|
||||
|
||||
// Check if we should follow the bottom scrolling
|
||||
if (shouldScroll) {
|
||||
prev.scrollTop = prev.scrollHeight;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
function updatePadViewers(vc) {
|
||||
// Get the reference to the viewers count inputElement
|
||||
/**
|
||||
* @type {HTMLInputElement}
|
||||
*/
|
||||
const viewerCount = document.getElementById(`currentViewers`);
|
||||
|
||||
// Get the amount of total viewers
|
||||
const totalViews = viewerCount.value.split("|")[1].trim();
|
||||
|
||||
// Set back the real value
|
||||
viewerCount.value = `${vc} | ${totalViews}`;
|
||||
}
|
||||
|
||||
function connectSocket() {
|
||||
// Check if the socket is established
|
||||
if ( !!!window.socket || window.socket.readyState !== WebSocket.OPEN ) {
|
||||
updateStatus(`Connecting...`, `text-warning`);
|
||||
// Connect the socket
|
||||
window.socket = new PadSocket(padTitle);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// TODO: Test if this is actually necessary or the DOMContentLoaded event would suffice
|
||||
// wait for the whole window to load
|
||||
window.addEventListener(`load`, e => {
|
||||
window.socket = new PadSocket(padTitle);
|
||||
connectSocket()
|
||||
})
|
||||
|
||||
|
||||
// lol
|
||||
function escapeHtml(html){
|
||||
const text = document.createTextNode(html);
|
||||
const p = document.createElement('p');
|
||||
|
||||
p.appendChild(text);
|
||||
const content = p.innerHTML;
|
||||
p.remove();
|
||||
|
||||
return content;
|
||||
}
|
||||
|
|
@ -35,7 +35,9 @@
|
|||
|
||||
</div>
|
||||
|
||||
<h2 class="mb-4">{{.title}}</h2>
|
||||
<h2 class="mb-4" id="padTitle">
|
||||
{{.title}}
|
||||
</h2>
|
||||
|
||||
<div id="pad-content-area">
|
||||
<div class="btn-sm btn" id="pad-content-toggler" onclick="toggleTextareaPreview()">
|
||||
|
|
@ -53,8 +55,7 @@
|
|||
|
||||
<pre><code id="textarea-preview" class="form-control hidden">{{.post_content}}</code></pre>
|
||||
|
||||
<textarea maxlength="{{.maximumPadSize}}" name="pad-content" id="pad-content" onchange="sendMyData(this)"
|
||||
onkeydown="updateStatus(`Not Saved`, `text-warning`); toggleWritingWatch(this)"
|
||||
<textarea maxlength="{{.maximumPadSize}}" name="pad-content" id="pad-content" onkeyup="window.socket.sendPadUpdate()"
|
||||
class="form-control hidden">{{.post_content}}</textarea>
|
||||
</div>
|
||||
|
||||
|
|
@ -73,7 +74,7 @@
|
|||
</div>
|
||||
</div>
|
||||
|
||||
<div class="col-md-12 col-lg-4 col-xl-4 mt-4 mt-lg-0 mt-xl-0" title="Current Viewers">
|
||||
<div class="col-md-12 col-lg-4 col-xl-4 mt-4 mt-lg-0 mt-xl-0" title="Current Viewers | Total Views">
|
||||
<div class="input-group">
|
||||
<span class="input-group-text">
|
||||
<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor"
|
||||
|
|
@ -86,7 +87,7 @@
|
|||
</path>
|
||||
</svg>
|
||||
</span>
|
||||
<input type="text" class="form-control" readonly value="{{.views}}">
|
||||
<input type="text" class="form-control" readonly value="1 | {{.views}}" id="currentViewers">
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue