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Converted to code to using webassembly

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This commit is contained in:
joeyak 2019-03-11 23:15:42 -04:00
parent 2879ab2c95
commit 5544ac817f
10 changed files with 650 additions and 82 deletions
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3
.gitignore vendored
View File

@ -25,3 +25,6 @@ settings.json
# vscode
.vscode
# Autobuilt wasm files
static/main.wasm

16
Makefile
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@ -1,10 +1,6 @@
#export GOOS=linux
#export GOARCH=386
.PHONY: sync fmt vet
all: vet fmt MovieNight MovieNight.exe
all: vet fmt MovieNight MovieNight.exe static/main.wasm
MovieNight.exe: *.go
GOOS=windows GOARCH=amd64 go build -o MovieNight.exe
@ -12,16 +8,18 @@ MovieNight.exe: *.go
MovieNight: *.go
GOOS=linux GOARCH=386 go build -o MovieNight
static/main.wasm: wasm/*.go
GOOS=js GOARCH=wasm go build -o ./static/main.wasm wasm/*.go
clean:
rm MovieNight.exe MovieNight
rm MovieNight.exe MovieNight ./static/main.wasm
fmt:
gofmt -w .
vet:
go vet
go vet ./...
GOOS=js GOARCH=wasm go vet ./...
sync:
#rsync -v --no-perms --chmod=ugo=rwX -r ./ zorchenhimer@movienight.zorchenhimer.com:/home/zorchenhimer/movienight/
#rsync -v --no-perms --chmod=ugo=rwX -e "ssh -i /c/movienight/movienight-deploy.key" -r ./ zorchenhimer@movienight.zorchenhimer.com:/home/zorchenhimer/movienight/
scp -i /c/movienight/movienight-deploy.key -r . zorchenhimer@movienight.zorchenhimer.com:/home/zorchenhimer/movienight

29
chathandler.go
View File

@ -66,13 +66,30 @@ func wsHandler(w http.ResponseWriter, r *http.Request) {
return
}
go func() {
var client *Client
//first message has to be the name
_, msg, err := conn.ReadMessage()
client := chat.Join(string(msg), conn)
if client == nil || err != nil {
fmt.Printf("[handler] Client closed connection: %s\n", conn.RemoteAddr().String())
conn.Close() //closing connection to indicate failed Join
return
// loop through name since websocket is opened once
for client == nil {
_, msg, err := conn.ReadMessage()
if err != nil {
fmt.Printf("[handler] Client closed connection: %s\n", conn.RemoteAddr().String())
conn.Close()
return
}
name := string(msg)
client, err = chat.Join(name, conn)
if err != nil {
switch err.(type) {
case UserFormatError, UserTakenError:
fmt.Printf("[handler] %v\n", err)
case BannedUserError:
fmt.Printf("[BAN] %v\n", err)
// close connection since banned users shouldn't be connecting
conn.Close()
}
}
}
//then watch for incoming messages

20
chatroom.go
View File

@ -2,6 +2,7 @@ package main
import (
"fmt"
//"html"
"math/rand"
"path/filepath"
@ -13,7 +14,10 @@ import (
"github.com/gorilla/websocket"
)
const UsernameMaxLength int = 36
const (
UsernameMaxLength int = 36
UsernameMinLength int = 3
)
var re_username *regexp.Regexp = regexp.MustCompile(`^[0-9a-zA-Z_-]+$`)
@ -85,16 +89,16 @@ func randomColor() string {
//registering a new client
//returns pointer to a Client, or Nil, if the name is already taken
func (cr *ChatRoom) Join(name string, conn *websocket.Conn) *Client {
func (cr *ChatRoom) Join(name string, conn *websocket.Conn) (*Client, error) {
if len(name) > UsernameMaxLength || !re_username.MatchString(name) {
return nil
if len(name) < UsernameMinLength || len(name) > UsernameMaxLength || !re_username.MatchString(name) {
return nil, UserFormatError{Name: name}
}
defer cr.clientsMtx.Unlock()
cr.clientsMtx.Lock() //preventing simultaneous access to the `clients` map
if _, exists := cr.clients[strings.ToLower(name)]; exists {
return nil
return nil, UserTakenError{Name: name}
}
client := &Client{
@ -107,9 +111,7 @@ func (cr *ChatRoom) Join(name string, conn *websocket.Conn) *Client {
host := client.Host()
if banned, names := settings.IsBanned(host); banned {
fmt.Printf("[BAN] Banned user tried to connect with IP %s: %q (banned with name(s) %q)\n", host, name, strings.Join(names, ", "))
conn.Close()
return nil
return nil, newBannedUserError(host, name, names)
}
cr.clients[strings.ToLower(name)] = client
@ -117,7 +119,7 @@ func (cr *ChatRoom) Join(name string, conn *websocket.Conn) *Client {
fmt.Printf("[join] %s %s\n", host, name)
client.Send(cr.GetPlayingString())
cr.AddMsg(fmt.Sprintf("<i><b style=\"color:%s\">%s</b> has joined the chat.</i><br />", client.color, name))
return client
return client, nil
}
// TODO: fix this up a bit. kick and leave are the same, incorrect, error: "That name was already used!"

43
errors.go Normal file
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@ -0,0 +1,43 @@
package main
import (
"fmt"
"strings"
)
// UserNameError is a base error for errors that deal with user names
type UserNameError struct {
Name string
}
// UserFormatError is an error for when the name format does not match what is required
type UserFormatError UserNameError
func (e UserFormatError) Error() string {
return fmt.Sprintf("\"%s\", is in an invalid format", e.Name)
}
// UserTakenError is an error for when a user tries to join with a name that is already taken
type UserTakenError UserNameError
func (e UserTakenError) Error() string {
return fmt.Sprintf("\"%s\", is already taken", e.Name)
}
// BannedUserError is an error for when a user tries to join with a banned ip address
type BannedUserError struct {
Host, Name string
Names []string
}
func (e BannedUserError) Error() string {
return fmt.Sprintf("banned user tried to connect with IP %s: %s (banned with name(s) %s)", e.Host, e.Name, strings.Join(e.Names, ", "))
}
func newBannedUserError(host, name string, names []string) BannedUserError {
return BannedUserError{
Host: host,
Name: name,
Names: names,
}
}

1
main.go
View File

@ -113,6 +113,7 @@ func main() {
// Chat websocket
http.HandleFunc("/ws", wsHandler)
http.HandleFunc("/static/js/", wsStaticFiles)
http.HandleFunc("/static/main.wasm", wsStaticFiles)
http.HandleFunc("/static/site.css", wsStaticFiles)
http.HandleFunc("/emotes/", wsEmotes)
http.HandleFunc("/favicon.ico", wsStaticFiles)

5
static/index.html
View File

@ -6,6 +6,7 @@
<link rel="stylesheet" type="text/css" href="/static/site.css">
<script type="application/javascript" src="/static/js/jquery.js"></script>
<script type="application/javascript" src="/static/js/flv.min.js"></script>
<script type="application/javascript" src="/static/js/wasm_exec.js"></script>
<script type="application/javascript" src="/static/js/client.js"></script>
</head>
@ -23,8 +24,8 @@
<div id="chatbox">
<div id="phase1">
<p style="color:#e5e0e5">Please enter your name to Join the chat</P>
<input id="name">
<button id="join">Join</button>
<input id="name" maxlength="36">
<button id="join" onclick="join();">Join</button>
</div>
<div id="error"></div>
<div id="phase2" style="opacity:0">

116
static/js/client.js
View File

@ -11,15 +11,6 @@ function initPlayer() {
}
}
//helper function for debugging purposes
function toHex(str) {
var result = '';
for (var i = 0; i < str.length; i++) {
result += ("0" + str.charCodeAt(i).toString(16)).slice(-2) + " ";
}
return result.toUpperCase();
}
function setPlaying(title, link) {
if (title === "") {
$('#playingDiv').hide();
@ -41,6 +32,23 @@ function setPlaying(title, link) {
$('#playinglink').attr('href', link);
}
function startGo() {
if (!WebAssembly.instantiateStreaming) { // polyfill
WebAssembly.instantiateStreaming = async (resp, importObject) => {
const source = await (await resp).arrayBuffer();
return await WebAssembly.instantiate(source, importObject);
};
}
const go = new Go();
WebAssembly.instantiateStreaming(fetch("/static/main.wasm"), go.importObject).then((result) => {
go.run(result.instance)
}).catch((err) => {
console.error(err);
});
}
function getWsUri() {
port = window.location.port
if (port == "") {
@ -49,68 +57,64 @@ function getWsUri() {
return "ws://" + window.location.hostname + ":" + port + "/ws"
}
function appendMessages(msg) {
$("#messages").append(msg).scrollTop(9e6);
}
function openChat() {
console.log("chat opening");
$("#phase1").animate({ opacity: 0 }, 500, "linear", function () {
$("#phase1").css({ display: "none" })
$("#phase2").css({ opacity: 1 })
$("#msg").focus()
})
}
function closeChat() {
console.log("chat closing")
$("#phase1").stop().css({ display: "block" }).animate({ opacity: 1 }, 500)
$("#phase2").stop().animate({ opacity: 0 })
$("#error").html("That name was already used!")
}
function join() {
let name = $("#name").val();
if (name.length < 3 || name.length > 36) {
$("#error").html("Please input a name between 3 and 36 characters");
return;
}
sendMessage($("#name").val());
openChat();
}
let ws = new WebSocket(getWsUri());
ws.onmessage = (m) => recieveMessage(m.data);
ws.onopen = (e) => console.log("Websocket Open:", e);
ws.onclose = () => closeChat();
ws.onerror = (e) => console.log("Websocket Error:", e);
function websocketSend(data) {
ws.send(data)
}
window.onload = function () {
$("INPUT").val("")
startGo();
$("#name").keypress(function (evt) {
if (evt.originalEvent.keyCode == 13) {
$("#join").trigger("click")
}
})
//handling the start of the chat
$("#join").click(function () {
$("#error").html("");
var name = $("#name").val()
if (name.length < 3) {
$("#error").html("Name is too short!");
return
}
console.log("join started")
chat = new WebSocket(getWsUri());
chat.onopen = function (evt) {
chat.send(name); //sending the chat name
$("#phase1").animate({ opacity: 0 }, 500, "linear", function () {
$("#phase1").css({ display: "none" })
$("#phase2").css({ opacity: 1 })
$("#msg").focus()
})
};
chat.onerror = function (evt) {
console.log("Websocket Error:", evt)
};
chat.onclose = function (evt) {
console.log("chat closing")
$("#phase1").stop().css({ display: "block" }).animate({ opacity: 1 }, 500)
$("#phase2").stop().animate({ opacity: 0 })
$("#error").html("That name was already used!")
};
chat.onmessage = function (evt) {
$("#messages").append(evt.data).scrollTop(9e6)
};
})
$("#msg").keypress(function (evt) {
if (evt.originalEvent.keyCode == 13 && !evt.originalEvent.shiftKey) {
$("#send").trigger("click")
evt.preventDefault();
// submit name
}
})
$("#send").click(function () {
chat.send($("#msg").val());
sendMessage($("#msg").val());
$("#msg").val("");
})
//helper function for escaping HTML
var entityMap = {
"&": "&amp;",
"<": "&lt;",
">": "&gt;",
'"': '&quot;',
"'": '&#39;',
"/": '&#x2F;',
"\n": '<BR/>'
};
}

465
static/js/wasm_exec.js Normal file
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@ -0,0 +1,465 @@
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
(() => {
if (typeof global !== "undefined") {
// global already exists
} else if (typeof window !== "undefined") {
window.global = window;
} else if (typeof self !== "undefined") {
self.global = self;
} else {
throw new Error("cannot export Go (neither global, window nor self is defined)");
}
// Map web browser API and Node.js API to a single common API (preferring web standards over Node.js API).
const isNodeJS = global.process && global.process.title === "node";
if (isNodeJS) {
global.require = require;
global.fs = require("fs");
const nodeCrypto = require("crypto");
global.crypto = {
getRandomValues(b) {
nodeCrypto.randomFillSync(b);
},
};
global.performance = {
now() {
const [sec, nsec] = process.hrtime();
return sec * 1000 + nsec / 1000000;
},
};
const util = require("util");
global.TextEncoder = util.TextEncoder;
global.TextDecoder = util.TextDecoder;
} else {
let outputBuf = "";
global.fs = {
constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
writeSync(fd, buf) {
outputBuf += decoder.decode(buf);
const nl = outputBuf.lastIndexOf("\n");
if (nl != -1) {
console.log(outputBuf.substr(0, nl));
outputBuf = outputBuf.substr(nl + 1);
}
return buf.length;
},
write(fd, buf, offset, length, position, callback) {
if (offset !== 0 || length !== buf.length || position !== null) {
throw new Error("not implemented");
}
const n = this.writeSync(fd, buf);
callback(null, n);
},
open(path, flags, mode, callback) {
const err = new Error("not implemented");
err.code = "ENOSYS";
callback(err);
},
read(fd, buffer, offset, length, position, callback) {
const err = new Error("not implemented");
err.code = "ENOSYS";
callback(err);
},
fsync(fd, callback) {
callback(null);
},
};
}
const encoder = new TextEncoder("utf-8");
const decoder = new TextDecoder("utf-8");
global.Go = class {
constructor() {
this.argv = ["js"];
this.env = {};
this.exit = (code) => {
if (code !== 0) {
console.warn("exit code:", code);
}
};
this._exitPromise = new Promise((resolve) => {
this._resolveExitPromise = resolve;
});
this._pendingEvent = null;
this._scheduledTimeouts = new Map();
this._nextCallbackTimeoutID = 1;
const mem = () => {
// The buffer may change when requesting more memory.
return new DataView(this._inst.exports.mem.buffer);
}
const setInt64 = (addr, v) => {
mem().setUint32(addr + 0, v, true);
mem().setUint32(addr + 4, Math.floor(v / 4294967296), true);
}
const getInt64 = (addr) => {
const low = mem().getUint32(addr + 0, true);
const high = mem().getInt32(addr + 4, true);
return low + high * 4294967296;
}
const loadValue = (addr) => {
const f = mem().getFloat64(addr, true);
if (f === 0) {
return undefined;
}
if (!isNaN(f)) {
return f;
}
const id = mem().getUint32(addr, true);
return this._values[id];
}
const storeValue = (addr, v) => {
const nanHead = 0x7FF80000;
if (typeof v === "number") {
if (isNaN(v)) {
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 0, true);
return;
}
if (v === 0) {
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 1, true);
return;
}
mem().setFloat64(addr, v, true);
return;
}
switch (v) {
case undefined:
mem().setFloat64(addr, 0, true);
return;
case null:
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 2, true);
return;
case true:
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 3, true);
return;
case false:
mem().setUint32(addr + 4, nanHead, true);
mem().setUint32(addr, 4, true);
return;
}
let ref = this._refs.get(v);
if (ref === undefined) {
ref = this._values.length;
this._values.push(v);
this._refs.set(v, ref);
}
let typeFlag = 0;
switch (typeof v) {
case "string":
typeFlag = 1;
break;
case "symbol":
typeFlag = 2;
break;
case "function":
typeFlag = 3;
break;
}
mem().setUint32(addr + 4, nanHead | typeFlag, true);
mem().setUint32(addr, ref, true);
}
const loadSlice = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
return new Uint8Array(this._inst.exports.mem.buffer, array, len);
}
const loadSliceOfValues = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
const a = new Array(len);
for (let i = 0; i < len; i++) {
a[i] = loadValue(array + i * 8);
}
return a;
}
const loadString = (addr) => {
const saddr = getInt64(addr + 0);
const len = getInt64(addr + 8);
return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
}
const timeOrigin = Date.now() - performance.now();
this.importObject = {
go: {
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
// This changes the SP, thus we have to update the SP used by the imported function.
// func wasmExit(code int32)
"runtime.wasmExit": (sp) => {
const code = mem().getInt32(sp + 8, true);
this.exited = true;
delete this._inst;
delete this._values;
delete this._refs;
this.exit(code);
},
// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
"runtime.wasmWrite": (sp) => {
const fd = getInt64(sp + 8);
const p = getInt64(sp + 16);
const n = mem().getInt32(sp + 24, true);
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
},
// func nanotime() int64
"runtime.nanotime": (sp) => {
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
},
// func walltime() (sec int64, nsec int32)
"runtime.walltime": (sp) => {
const msec = (new Date).getTime();
setInt64(sp + 8, msec / 1000);
mem().setInt32(sp + 16, (msec % 1000) * 1000000, true);
},
// func scheduleTimeoutEvent(delay int64) int32
"runtime.scheduleTimeoutEvent": (sp) => {
const id = this._nextCallbackTimeoutID;
this._nextCallbackTimeoutID++;
this._scheduledTimeouts.set(id, setTimeout(
() => { this._resume(); },
getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
));
mem().setInt32(sp + 16, id, true);
},
// func clearTimeoutEvent(id int32)
"runtime.clearTimeoutEvent": (sp) => {
const id = mem().getInt32(sp + 8, true);
clearTimeout(this._scheduledTimeouts.get(id));
this._scheduledTimeouts.delete(id);
},
// func getRandomData(r []byte)
"runtime.getRandomData": (sp) => {
crypto.getRandomValues(loadSlice(sp + 8));
},
// func stringVal(value string) ref
"syscall/js.stringVal": (sp) => {
storeValue(sp + 24, loadString(sp + 8));
},
// func valueGet(v ref, p string) ref
"syscall/js.valueGet": (sp) => {
const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
sp = this._inst.exports.getsp(); // see comment above
storeValue(sp + 32, result);
},
// func valueSet(v ref, p string, x ref)
"syscall/js.valueSet": (sp) => {
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
},
// func valueIndex(v ref, i int) ref
"syscall/js.valueIndex": (sp) => {
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
},
// valueSetIndex(v ref, i int, x ref)
"syscall/js.valueSetIndex": (sp) => {
Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
},
// func valueCall(v ref, m string, args []ref) (ref, bool)
"syscall/js.valueCall": (sp) => {
try {
const v = loadValue(sp + 8);
const m = Reflect.get(v, loadString(sp + 16));
const args = loadSliceOfValues(sp + 32);
const result = Reflect.apply(m, v, args);
sp = this._inst.exports.getsp(); // see comment above
storeValue(sp + 56, result);
mem().setUint8(sp + 64, 1);
} catch (err) {
storeValue(sp + 56, err);
mem().setUint8(sp + 64, 0);
}
},
// func valueInvoke(v ref, args []ref) (ref, bool)
"syscall/js.valueInvoke": (sp) => {
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.apply(v, undefined, args);
sp = this._inst.exports.getsp(); // see comment above
storeValue(sp + 40, result);
mem().setUint8(sp + 48, 1);
} catch (err) {
storeValue(sp + 40, err);
mem().setUint8(sp + 48, 0);
}
},
// func valueNew(v ref, args []ref) (ref, bool)
"syscall/js.valueNew": (sp) => {
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.construct(v, args);
sp = this._inst.exports.getsp(); // see comment above
storeValue(sp + 40, result);
mem().setUint8(sp + 48, 1);
} catch (err) {
storeValue(sp + 40, err);
mem().setUint8(sp + 48, 0);
}
},
// func valueLength(v ref) int
"syscall/js.valueLength": (sp) => {
setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
},
// valuePrepareString(v ref) (ref, int)
"syscall/js.valuePrepareString": (sp) => {
const str = encoder.encode(String(loadValue(sp + 8)));
storeValue(sp + 16, str);
setInt64(sp + 24, str.length);
},
// valueLoadString(v ref, b []byte)
"syscall/js.valueLoadString": (sp) => {
const str = loadValue(sp + 8);
loadSlice(sp + 16).set(str);
},
// func valueInstanceOf(v ref, t ref) bool
"syscall/js.valueInstanceOf": (sp) => {
mem().setUint8(sp + 24, loadValue(sp + 8) instanceof loadValue(sp + 16));
},
"debug": (value) => {
console.log(value);
},
}
};
}
async run(instance) {
this._inst = instance;
this._values = [ // TODO: garbage collection
NaN,
0,
null,
true,
false,
global,
this._inst.exports.mem,
this,
];
this._refs = new Map();
this.exited = false;
const mem = new DataView(this._inst.exports.mem.buffer)
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
let offset = 4096;
const strPtr = (str) => {
let ptr = offset;
new Uint8Array(mem.buffer, offset, str.length + 1).set(encoder.encode(str + "\0"));
offset += str.length + (8 - (str.length % 8));
return ptr;
};
const argc = this.argv.length;
const argvPtrs = [];
this.argv.forEach((arg) => {
argvPtrs.push(strPtr(arg));
});
const keys = Object.keys(this.env).sort();
argvPtrs.push(keys.length);
keys.forEach((key) => {
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
});
const argv = offset;
argvPtrs.forEach((ptr) => {
mem.setUint32(offset, ptr, true);
mem.setUint32(offset + 4, 0, true);
offset += 8;
});
this._inst.exports.run(argc, argv);
if (this.exited) {
this._resolveExitPromise();
}
await this._exitPromise;
}
_resume() {
if (this.exited) {
throw new Error("Go program has already exited");
}
this._inst.exports.resume();
if (this.exited) {
this._resolveExitPromise();
}
}
_makeFuncWrapper(id) {
const go = this;
return function () {
const event = { id: id, this: this, args: arguments };
go._pendingEvent = event;
go._resume();
return event.result;
};
}
}
if (isNodeJS) {
if (process.argv.length < 3) {
process.stderr.write("usage: go_js_wasm_exec [wasm binary] [arguments]\n");
process.exit(1);
}
const go = new Go();
go.argv = process.argv.slice(2);
go.env = Object.assign({ TMPDIR: require("os").tmpdir() }, process.env);
go.exit = process.exit;
WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => {
process.on("exit", (code) => { // Node.js exits if no event handler is pending
if (code === 0 && !go.exited) {
// deadlock, make Go print error and stack traces
go._pendingEvent = { id: 0 };
go._resume();
}
});
return go.run(result.instance);
}).catch((err) => {
throw err;
});
}
})();

34
wasm/main_wasm.go Normal file
View File

@ -0,0 +1,34 @@
package main
import (
"fmt"
"time"
"github.com/dennwc/dom/js"
)
func log(s string) {
js.Get("console").Call("log", s)
}
func recieve(v []js.Value) {
js.Call("appendMessages", v)
}
func send(v []js.Value) {
if len(v) != 1 {
log(fmt.Sprintf("expected 1 parameter, got %d", len(v)))
return
}
js.Call("websocketSend", v)
}
func main() {
js.Set("recieveMessage", js.CallbackOf(recieve))
js.Set("sendMessage", js.CallbackOf(send))
// This is needed so the goroutine does not end
for {
time.Sleep(time.Minute)
}
}