mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-04 07:25:39 +00:00
wasm play
See: * https://twitter.com/bradfitz/status/1450916922288005122 * https://twitter.com/bradfitz/status/1451423386777751561 * https://twitter.com/bradfitz/status/1457830780550275075 Updates #3157 Change-Id: I7f5a1b1bc1b8a4af0a700834c3fe09c8c791f6dc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
parent
cc91a05686
commit
cd54f07bd9
@ -16,7 +16,6 @@
|
||||
"path/filepath"
|
||||
"runtime"
|
||||
"strings"
|
||||
"syscall"
|
||||
|
||||
"github.com/peterbourgon/ff/v3/ffcli"
|
||||
"inet.af/netaddr"
|
||||
@ -116,7 +115,7 @@ func runSSH(ctx context.Context, args []string) error {
|
||||
log.Printf("Running: %q, %q ...", ssh, argv)
|
||||
}
|
||||
|
||||
if runtime.GOOS == "windows" {
|
||||
if runtime.GOOS == "windows" || runtime.GOOS == "js" {
|
||||
// Don't use syscall.Exec on Windows.
|
||||
cmd := exec.Command(ssh, argv[1:]...)
|
||||
cmd.Stdin = os.Stdin
|
||||
@ -130,7 +129,7 @@ func runSSH(ctx context.Context, args []string) error {
|
||||
return err
|
||||
}
|
||||
|
||||
if err := syscall.Exec(ssh, argv, os.Environ()); err != nil {
|
||||
if err := syscallExec(ssh, argv, os.Environ()); err != nil {
|
||||
return err
|
||||
}
|
||||
return errors.New("unreachable")
|
||||
|
||||
8
cmd/tailscale/cli/ssh_exec.go
Normal file
8
cmd/tailscale/cli/ssh_exec.go
Normal file
@ -0,0 +1,8 @@
|
||||
//go:build !js
|
||||
// +build !js
|
||||
|
||||
package cli
|
||||
|
||||
import "syscall"
|
||||
|
||||
var syscallExec = syscall.Exec
|
||||
5
cmd/tailscale/cli/ssh_js.go
Normal file
5
cmd/tailscale/cli/ssh_js.go
Normal file
@ -0,0 +1,5 @@
|
||||
package cli
|
||||
|
||||
var syscallExec = func(argv0 string, argv []string, envv []string) (err error) {
|
||||
panic("unreachable")
|
||||
}
|
||||
8
go.sum
8
go.sum
@ -289,6 +289,7 @@ 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-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-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
|
||||
github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
|
||||
github.com/github/fakeca v0.1.0 h1:Km/MVOFvclqxPM9dZBC4+QE564nU4gz4iZ0D9pMw28I=
|
||||
github.com/github/fakeca v0.1.0/go.mod h1:+bormgoGMMuamOscx7N91aOuUST7wdaJ2rNjeohylyo=
|
||||
@ -331,6 +332,8 @@ github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD87
|
||||
github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
|
||||
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/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
|
||||
github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
|
||||
github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI=
|
||||
github.com/go-redis/redis v6.15.8+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
|
||||
github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
|
||||
@ -368,6 +371,8 @@ github.com/gobwas/pool v0.2.0 h1:QEmUOlnSjWtnpRGHF3SauEiOsy82Cup83Vf2LcMlnc8=
|
||||
github.com/gobwas/pool v0.2.0/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
|
||||
github.com/gobwas/pool v0.2.0/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
|
||||
github.com/gobwas/ws v1.0.2 h1:CoAavW/wd/kulfZmSIBt6p24n4j7tHgNVCjsfHVNUbo=
|
||||
github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee/go.mod h1:L0fX3K22YWvt/FAX9NnzrNzcI4wNYi9Yku4O0LKYflo=
|
||||
github.com/gobwas/pool v0.2.0/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
|
||||
github.com/gobwas/ws v1.0.2/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/EM=
|
||||
github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
|
||||
github.com/godbus/dbus/v5 v5.0.6 h1:mkgN1ofwASrYnJ5W6U/BxG15eXXXjirgZc7CLqkcaro=
|
||||
@ -821,6 +826,8 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJ
|
||||
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
|
||||
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
|
||||
github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI=
|
||||
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
|
||||
github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
|
||||
github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
|
||||
github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwdSHYgviHp1DAtfrULt5eUgsSMsZf+YrPgl8=
|
||||
github.com/moricho/tparallel v0.2.1 h1:95FytivzT6rYzdJLdtfn6m1bfFJylOJK41+lgv/EHf4=
|
||||
@ -1119,6 +1126,7 @@ github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVM
|
||||
github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
|
||||
github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
|
||||
github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs=
|
||||
github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
|
||||
github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
|
||||
github.com/ulikunitz/xz v0.5.7/go.mod h1:nbz6k7qbPmH4IRqmfOplQw/tblSgqTqBwxkY0oWt/14=
|
||||
github.com/ulikunitz/xz v0.5.10 h1:t92gobL9l3HE202wg3rlk19F6X+JOxl9BBrCCMYEYd8=
|
||||
|
||||
3
wasmtest/Makefile
Normal file
3
wasmtest/Makefile
Normal file
@ -0,0 +1,3 @@
|
||||
run:
|
||||
GOROOT=/home/bradfitz/hack/go GOOS=js GOARCH=wasm /home/bradfitz/hack/go/bin/go build -o test.wasm ./wasmmod/
|
||||
go run serve.go
|
||||
48
wasmtest/index.html
Normal file
48
wasmtest/index.html
Normal file
@ -0,0 +1,48 @@
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<html>
|
||||
<head>
|
||||
<meta charset="utf-8"/>
|
||||
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha256-/SIrNqv8h6QGKDuNoLGA4iret+kyesCkHGzVUUV0shc=" crossorigin="anonymous"></script>
|
||||
<script src="https://use.fontawesome.com/47de3a5ce8.js"></script>
|
||||
<script src="wasm_exec.js"></script>
|
||||
<script>
|
||||
const go = new Go();
|
||||
WebAssembly.instantiateStreaming(fetch("test.wasm"), go.importObject).then((result) => {
|
||||
go.run(result.instance);
|
||||
});
|
||||
</script>
|
||||
</head>
|
||||
<body>
|
||||
<form id=topbar style='padding: 5px'>
|
||||
<input type=button value="Start" onclick='startClicked()'>
|
||||
<input type=button value="Logout" onclick='logoutClicked()'>
|
||||
<input type=button value="Goroutines" onclick='seeGoroutines()'>
|
||||
<input type=button value="StartLoginInteractive" onclick='startLoginInteractive()'>
|
||||
<input type=button value="authkey" onclick='startAuthKey(prompt("auth key:", ""))'>
|
||||
</form>
|
||||
<div><b>Backend state: </b><span id='state'>(wasm loading)</span> <span id='loginURL'></span></div>
|
||||
<div class="term" style='width: 100%; height: 25em;'>
|
||||
<div class="inner"></div>
|
||||
</div>
|
||||
<div id=netmap></div>
|
||||
<link rel="stylesheet" href="https://unpkg.com/xterm@4.15.0-beta.10/css/xterm.css" />
|
||||
<style>
|
||||
.xterm-viewport.xterm-viewport {
|
||||
scrollbar-width: thin;
|
||||
}
|
||||
.xterm-viewport::-webkit-scrollbar {
|
||||
width: 10px;
|
||||
}
|
||||
.xterm-viewport::-webkit-scrollbar-track {
|
||||
opacity: 0;
|
||||
}
|
||||
.xterm-viewport::-webkit-scrollbar-thumb {
|
||||
min-height: 20px;
|
||||
background-color: #ffffff20;
|
||||
}
|
||||
</style>
|
||||
<script src="https://unpkg.com/xterm@4.15.0-beta.10/lib/xterm.js"></script>
|
||||
<script src="https://unpkg.com/xterm-addon-webgl@0.12.0-beta.15/lib/xterm-addon-webgl.js"></script>
|
||||
<script src="term.js"></script>
|
||||
</body>
|
||||
</html>
|
||||
15
wasmtest/serve.go
Normal file
15
wasmtest/serve.go
Normal file
@ -0,0 +1,15 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"log"
|
||||
"net/http"
|
||||
)
|
||||
|
||||
func main() {
|
||||
log.Printf("listening on :9090")
|
||||
err := http.ListenAndServe(":9090", http.FileServer(http.Dir(".")))
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
return
|
||||
}
|
||||
}
|
||||
265
wasmtest/term.js
Normal file
265
wasmtest/term.js
Normal file
@ -0,0 +1,265 @@
|
||||
// Hacked up version of https://xtermjs.org/js/demo.js
|
||||
// for now.
|
||||
|
||||
$(function () {
|
||||
// Custom theme to match style of xterm.js logo
|
||||
var baseTheme = {
|
||||
foreground: '#F8F8F8',
|
||||
background: '#2D2E2C',
|
||||
selection: '#5DA5D533',
|
||||
black: '#1E1E1D',
|
||||
brightBlack: '#262625',
|
||||
red: '#CE5C5C',
|
||||
brightRed: '#FF7272',
|
||||
green: '#5BCC5B',
|
||||
brightGreen: '#72FF72',
|
||||
yellow: '#CCCC5B',
|
||||
brightYellow: '#FFFF72',
|
||||
blue: '#5D5DD3',
|
||||
brightBlue: '#7279FF',
|
||||
magenta: '#BC5ED1',
|
||||
brightMagenta: '#E572FF',
|
||||
cyan: '#5DA5D5',
|
||||
brightCyan: '#72F0FF',
|
||||
white: '#F8F8F8',
|
||||
brightWhite: '#FFFFFF'
|
||||
};
|
||||
// vscode-snazzy https://github.com/Tyriar/vscode-snazzy
|
||||
var otherTheme = {
|
||||
foreground: '#eff0eb',
|
||||
background: '#282a36',
|
||||
selection: '#97979b33',
|
||||
black: '#282a36',
|
||||
brightBlack: '#686868',
|
||||
red: '#ff5c57',
|
||||
brightRed: '#ff5c57',
|
||||
green: '#5af78e',
|
||||
brightGreen: '#5af78e',
|
||||
yellow: '#f3f99d',
|
||||
brightYellow: '#f3f99d',
|
||||
blue: '#57c7ff',
|
||||
brightBlue: '#57c7ff',
|
||||
magenta: '#ff6ac1',
|
||||
brightMagenta: '#ff6ac1',
|
||||
cyan: '#9aedfe',
|
||||
brightCyan: '#9aedfe',
|
||||
white: '#f1f1f0',
|
||||
brightWhite: '#eff0eb'
|
||||
};
|
||||
var isBaseTheme = true;
|
||||
|
||||
var term = new window.Terminal({
|
||||
fontFamily: '"Cascadia Code", Menlo, monospace',
|
||||
theme: baseTheme,
|
||||
cursorBlink: true
|
||||
});
|
||||
term.open(document.querySelector('.term .inner'));
|
||||
theTerminal = term;
|
||||
|
||||
var isWebglEnabled = false;
|
||||
try {
|
||||
const webgl = new window.WebglAddon.WebglAddon();
|
||||
term.loadAddon(webgl);
|
||||
isWebglEnabled = true;
|
||||
} catch (e) {
|
||||
console.warn('WebGL addon threw an exception during load', e);
|
||||
}
|
||||
|
||||
// Cancel wheel events from scrolling the page if the terminal has scrollback
|
||||
document.querySelector('.xterm').addEventListener('wheel', e => {
|
||||
if (term.buffer.active.baseY > 0) {
|
||||
e.preventDefault();
|
||||
}
|
||||
});
|
||||
|
||||
function runFakeTerminal() {
|
||||
if (term._initialized) {
|
||||
return;
|
||||
}
|
||||
|
||||
term._initialized = true;
|
||||
|
||||
term.prompt = () => {
|
||||
term.write('\r\n$ ');
|
||||
};
|
||||
|
||||
// TODO: Use a nicer default font
|
||||
term.writeln('Tailscale js/wasm demo; try running `help`.');
|
||||
prompt(term);
|
||||
|
||||
term.onData(e => {
|
||||
switch (e) {
|
||||
case '\u0003': // Ctrl+C
|
||||
term.write('^C');
|
||||
prompt(term);
|
||||
break;
|
||||
case '\r': // Enter
|
||||
runCommand(term, command);
|
||||
command = '';
|
||||
break;
|
||||
case '\u007F': // Backspace (DEL)
|
||||
// Do not delete the prompt
|
||||
if (term._core.buffer.x > 2) {
|
||||
term.write('\b \b');
|
||||
if (command.length > 0) {
|
||||
command = command.substr(0, command.length - 1);
|
||||
}
|
||||
}
|
||||
break;
|
||||
default: // Print all other characters for demo
|
||||
if (e >= String.fromCharCode(0x20) && e <= String.fromCharCode(0x7B) || e >= '\u00a0') {
|
||||
command += e;
|
||||
term.write(e);
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
// Create a very simple link provider which hardcodes links for certain lines
|
||||
term.registerLinkProvider({
|
||||
provideLinks(bufferLineNumber, callback) {
|
||||
switch (bufferLineNumber) {
|
||||
case 2:
|
||||
callback([
|
||||
{
|
||||
text: 'VS Code',
|
||||
range: { start: { x: 28, y: 2 }, end: { x: 34, y: 2 } },
|
||||
activate() {
|
||||
window.open('https://github.com/microsoft/vscode', '_blank');
|
||||
}
|
||||
},
|
||||
{
|
||||
text: 'Hyper',
|
||||
range: { start: { x: 37, y: 2 }, end: { x: 41, y: 2 } },
|
||||
activate() {
|
||||
window.open('https://github.com/vercel/hyper', '_blank');
|
||||
}
|
||||
},
|
||||
{
|
||||
text: 'Theia',
|
||||
range: { start: { x: 47, y: 2 }, end: { x: 51, y: 2 } },
|
||||
activate() {
|
||||
window.open('https://github.com/eclipse-theia/theia', '_blank');
|
||||
}
|
||||
}
|
||||
]);
|
||||
return;
|
||||
case 8:
|
||||
callback([
|
||||
{
|
||||
text: 'WebGL renderer',
|
||||
range: { start: { x: 54, y: 8 }, end: { x: 67, y: 8 } },
|
||||
activate() {
|
||||
window.open('https://npmjs.com/package/xterm-addon-webgl', '_blank');
|
||||
}
|
||||
}
|
||||
]);
|
||||
return;
|
||||
case 14:
|
||||
callback([
|
||||
{
|
||||
text: 'Links',
|
||||
range: { start: { x: 45, y: 14 }, end: { x: 49, y: 14 } },
|
||||
activate() {
|
||||
window.alert('You can handle links any way you want');
|
||||
}
|
||||
},
|
||||
{
|
||||
text: 'themes',
|
||||
range: { start: { x: 52, y: 14 }, end: { x: 57, y: 14 } },
|
||||
activate() {
|
||||
isBaseTheme = !isBaseTheme;
|
||||
term.setOption('theme', isBaseTheme ? baseTheme : otherTheme);
|
||||
document.querySelector('.demo .inner').classList.toggle('other-theme', !isBaseTheme);
|
||||
term.write(`\r\nActivated ${isBaseTheme ? 'xterm.js' : 'snazzy'} theme`);
|
||||
prompt(term);
|
||||
}
|
||||
},
|
||||
{
|
||||
text: 'addons',
|
||||
range: { start: { x: 60, y: 14 }, end: { x: 65, y: 14 } },
|
||||
activate() {
|
||||
window.open('/docs/guides/using-addons/', '_blank');
|
||||
}
|
||||
},
|
||||
{
|
||||
text: 'typed API',
|
||||
range: { start: { x: 68, y: 14 }, end: { x: 76, y: 14 } },
|
||||
activate() {
|
||||
window.open('https://github.com/xtermjs/xterm.js/blob/master/typings/xterm.d.ts', '_blank');
|
||||
}
|
||||
},
|
||||
]);
|
||||
return;
|
||||
}
|
||||
callback(undefined);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
function prompt(term) {
|
||||
command = '';
|
||||
term.write('\r\n$ ');
|
||||
}
|
||||
|
||||
var command = '';
|
||||
var commands = {
|
||||
help: {
|
||||
f: () => {
|
||||
term.writeln([
|
||||
'Welcome to Tailscale js/wasm! Try some of the commands below.',
|
||||
'',
|
||||
...Object.keys(commands).map(e => ` ${e.padEnd(10)} ${commands[e].description}`)
|
||||
].join('\n\r'));
|
||||
prompt(term);
|
||||
},
|
||||
description: 'Prints this help message',
|
||||
},
|
||||
ssh: {
|
||||
f: () => {
|
||||
term.writeln("TODO(bradfitz): hook up golang.org/x/crypto/ssh");
|
||||
term.prompt(term);
|
||||
},
|
||||
description: 'SSH to a Tailscale peer'
|
||||
},
|
||||
tailscale: {
|
||||
f: (line) => {
|
||||
//term.writeln("TODO(bradfitz): run the tailscale command: "+line);
|
||||
runTailscaleCLI(line, function () { term.prompt(term) });
|
||||
},
|
||||
description: 'run cmd/tailscale'
|
||||
},
|
||||
http: {
|
||||
f: (line) => {
|
||||
runFakeCURL(line, function () { term.prompt(term) });
|
||||
},
|
||||
description: 'fetch a URL'
|
||||
},
|
||||
ssh: {
|
||||
f: (line) => {
|
||||
runSSH(line, function () { term.prompt(term) });
|
||||
},
|
||||
description: 'SSH to host'
|
||||
},
|
||||
goroutines: {
|
||||
f: () => {
|
||||
seeGoroutines();
|
||||
},
|
||||
description: 'dump goroutines'
|
||||
}
|
||||
};
|
||||
|
||||
function runCommand(term, text) {
|
||||
const command = text.trim().split(' ')[0];
|
||||
if (command.length > 0) {
|
||||
term.writeln('');
|
||||
if (command in commands) {
|
||||
commands[command].f(text);
|
||||
return;
|
||||
}
|
||||
term.writeln(`${command}: command not found`);
|
||||
}
|
||||
prompt(term);
|
||||
}
|
||||
|
||||
runFakeTerminal();
|
||||
});
|
||||
629
wasmtest/wasm_exec.js
Normal file
629
wasmtest/wasm_exec.js
Normal file
@ -0,0 +1,629 @@
|
||||
// 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.
|
||||
|
||||
(() => {
|
||||
// Map multiple JavaScript environments to a single common API,
|
||||
// preferring web standards over Node.js API.
|
||||
//
|
||||
// Environments considered:
|
||||
// - Browsers
|
||||
// - Node.js
|
||||
// - Electron
|
||||
// - Parcel
|
||||
// - Webpack
|
||||
|
||||
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)");
|
||||
}
|
||||
|
||||
if (!global.require && typeof require !== "undefined") {
|
||||
global.require = require;
|
||||
}
|
||||
|
||||
if (!global.fs && global.require) {
|
||||
const fs = require("fs");
|
||||
if (typeof fs === "object" && fs !== null && Object.keys(fs).length !== 0) {
|
||||
global.fs = fs;
|
||||
}
|
||||
}
|
||||
|
||||
const enosys = () => {
|
||||
const err = new Error("not implemented");
|
||||
err.code = "ENOSYS";
|
||||
return err;
|
||||
};
|
||||
|
||||
if (!global.fs) {
|
||||
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) {
|
||||
callback(enosys());
|
||||
return;
|
||||
}
|
||||
const n = this.writeSync(fd, buf);
|
||||
callback(null, n);
|
||||
},
|
||||
chmod(path, mode, callback) { callback(enosys()); },
|
||||
chown(path, uid, gid, callback) { callback(enosys()); },
|
||||
close(fd, callback) { callback(enosys()); },
|
||||
fchmod(fd, mode, callback) { callback(enosys()); },
|
||||
fchown(fd, uid, gid, callback) { callback(enosys()); },
|
||||
fstat(fd, callback) { callback(enosys()); },
|
||||
fsync(fd, callback) { callback(null); },
|
||||
ftruncate(fd, length, callback) { callback(enosys()); },
|
||||
lchown(path, uid, gid, callback) { callback(enosys()); },
|
||||
link(path, link, callback) { callback(enosys()); },
|
||||
lstat(path, callback) { callback(enosys()); },
|
||||
mkdir(path, perm, callback) { callback(enosys()); },
|
||||
open(path, flags, mode, callback) { callback(enosys()); },
|
||||
read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
|
||||
readdir(path, callback) { callback(enosys()); },
|
||||
readlink(path, callback) { callback(enosys()); },
|
||||
rename(from, to, callback) { callback(enosys()); },
|
||||
rmdir(path, callback) { callback(enosys()); },
|
||||
stat(path, callback) { callback(enosys()); },
|
||||
symlink(path, link, callback) { callback(enosys()); },
|
||||
truncate(path, length, callback) { callback(enosys()); },
|
||||
unlink(path, callback) { callback(enosys()); },
|
||||
utimes(path, atime, mtime, callback) { callback(enosys()); },
|
||||
};
|
||||
}
|
||||
|
||||
if (!global.process) {
|
||||
global.process = {
|
||||
getuid() { return -1; },
|
||||
getgid() { return -1; },
|
||||
geteuid() { return -1; },
|
||||
getegid() { return -1; },
|
||||
getgroups() { throw enosys(); },
|
||||
pid: -1,
|
||||
ppid: -1,
|
||||
umask() { throw enosys(); },
|
||||
cwd() { throw enosys(); },
|
||||
chdir() { throw enosys(); },
|
||||
}
|
||||
}
|
||||
|
||||
if (!global.crypto && global.require) {
|
||||
const nodeCrypto = require("crypto");
|
||||
global.crypto = {
|
||||
getRandomValues(b) {
|
||||
nodeCrypto.randomFillSync(b);
|
||||
},
|
||||
};
|
||||
}
|
||||
if (!global.crypto) {
|
||||
throw new Error("global.crypto is not available, polyfill required (getRandomValues only)");
|
||||
}
|
||||
|
||||
if (!global.performance) {
|
||||
global.performance = {
|
||||
now() {
|
||||
const [sec, nsec] = process.hrtime();
|
||||
return sec * 1000 + nsec / 1000000;
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
if (!global.TextEncoder && global.require) {
|
||||
global.TextEncoder = require("util").TextEncoder;
|
||||
}
|
||||
if (!global.TextEncoder) {
|
||||
throw new Error("global.TextEncoder is not available, polyfill required");
|
||||
}
|
||||
|
||||
if (!global.TextDecoder && global.require) {
|
||||
global.TextDecoder = require("util").TextDecoder;
|
||||
}
|
||||
if (!global.TextDecoder) {
|
||||
throw new Error("global.TextDecoder is not available, polyfill required");
|
||||
}
|
||||
|
||||
// End of polyfills for common API.
|
||||
|
||||
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 setInt64 = (addr, v) => {
|
||||
this.mem.setUint32(addr + 0, v, true);
|
||||
this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
|
||||
}
|
||||
|
||||
const getInt64 = (addr) => {
|
||||
const low = this.mem.getUint32(addr + 0, true);
|
||||
const high = this.mem.getInt32(addr + 4, true);
|
||||
return low + high * 4294967296;
|
||||
}
|
||||
|
||||
const loadValue = (addr) => {
|
||||
const f = this.mem.getFloat64(addr, true);
|
||||
if (f === 0) {
|
||||
return undefined;
|
||||
}
|
||||
if (!isNaN(f)) {
|
||||
return f;
|
||||
}
|
||||
|
||||
const id = this.mem.getUint32(addr, true);
|
||||
return this._values[id];
|
||||
}
|
||||
|
||||
const storeValue = (addr, v) => {
|
||||
const nanHead = 0x7FF80000;
|
||||
|
||||
if (typeof v === "number" && v !== 0) {
|
||||
if (isNaN(v)) {
|
||||
this.mem.setUint32(addr + 4, nanHead, true);
|
||||
this.mem.setUint32(addr, 0, true);
|
||||
return;
|
||||
}
|
||||
this.mem.setFloat64(addr, v, true);
|
||||
return;
|
||||
}
|
||||
|
||||
if (v === undefined) {
|
||||
this.mem.setFloat64(addr, 0, true);
|
||||
return;
|
||||
}
|
||||
|
||||
let id = this._ids.get(v);
|
||||
if (id === undefined) {
|
||||
id = this._idPool.pop();
|
||||
if (id === undefined) {
|
||||
id = this._values.length;
|
||||
}
|
||||
this._values[id] = v;
|
||||
this._goRefCounts[id] = 0;
|
||||
this._ids.set(v, id);
|
||||
}
|
||||
this._goRefCounts[id]++;
|
||||
let typeFlag = 0;
|
||||
switch (typeof v) {
|
||||
case "object":
|
||||
if (v !== null) {
|
||||
typeFlag = 1;
|
||||
}
|
||||
break;
|
||||
case "string":
|
||||
typeFlag = 2;
|
||||
break;
|
||||
case "symbol":
|
||||
typeFlag = 3;
|
||||
break;
|
||||
case "function":
|
||||
typeFlag = 4;
|
||||
break;
|
||||
}
|
||||
this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
|
||||
this.mem.setUint32(addr, id, 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) => {
|
||||
sp >>>= 0;
|
||||
const code = this.mem.getInt32(sp + 8, true);
|
||||
this.exited = true;
|
||||
delete this._inst;
|
||||
delete this._values;
|
||||
delete this._goRefCounts;
|
||||
delete this._ids;
|
||||
delete this._idPool;
|
||||
this.exit(code);
|
||||
},
|
||||
|
||||
// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
|
||||
"runtime.wasmWrite": (sp) => {
|
||||
sp >>>= 0;
|
||||
const fd = getInt64(sp + 8);
|
||||
const p = getInt64(sp + 16);
|
||||
const n = this.mem.getInt32(sp + 24, true);
|
||||
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
|
||||
},
|
||||
|
||||
// func resetMemoryDataView()
|
||||
"runtime.resetMemoryDataView": (sp) => {
|
||||
sp >>>= 0;
|
||||
this.mem = new DataView(this._inst.exports.mem.buffer);
|
||||
},
|
||||
|
||||
// func nanotime1() int64
|
||||
"runtime.nanotime1": (sp) => {
|
||||
sp >>>= 0;
|
||||
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
|
||||
},
|
||||
|
||||
// func walltime() (sec int64, nsec int32)
|
||||
"runtime.walltime": (sp) => {
|
||||
sp >>>= 0;
|
||||
const msec = (new Date).getTime();
|
||||
setInt64(sp + 8, msec / 1000);
|
||||
this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
|
||||
},
|
||||
|
||||
// func scheduleTimeoutEvent(delay int64) int32
|
||||
"runtime.scheduleTimeoutEvent": (sp) => {
|
||||
sp >>>= 0;
|
||||
const id = this._nextCallbackTimeoutID;
|
||||
this._nextCallbackTimeoutID++;
|
||||
this._scheduledTimeouts.set(id, setTimeout(
|
||||
() => {
|
||||
this._resume();
|
||||
while (this._scheduledTimeouts.has(id)) {
|
||||
// for some reason Go failed to register the timeout event, log and try again
|
||||
// (temporary workaround for https://github.com/golang/go/issues/28975)
|
||||
console.warn("scheduleTimeoutEvent: missed timeout event");
|
||||
this._resume();
|
||||
}
|
||||
},
|
||||
getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
|
||||
));
|
||||
this.mem.setInt32(sp + 16, id, true);
|
||||
},
|
||||
|
||||
// func clearTimeoutEvent(id int32)
|
||||
"runtime.clearTimeoutEvent": (sp) => {
|
||||
sp >>>= 0;
|
||||
const id = this.mem.getInt32(sp + 8, true);
|
||||
clearTimeout(this._scheduledTimeouts.get(id));
|
||||
this._scheduledTimeouts.delete(id);
|
||||
},
|
||||
|
||||
// func getRandomData(r []byte)
|
||||
"runtime.getRandomData": (sp) => {
|
||||
sp >>>= 0;
|
||||
crypto.getRandomValues(loadSlice(sp + 8));
|
||||
},
|
||||
|
||||
// func finalizeRef(v ref)
|
||||
"syscall/js.finalizeRef": (sp) => {
|
||||
sp >>>= 0;
|
||||
const id = this.mem.getUint32(sp + 8, true);
|
||||
this._goRefCounts[id]--;
|
||||
if (this._goRefCounts[id] === 0) {
|
||||
const v = this._values[id];
|
||||
this._values[id] = null;
|
||||
this._ids.delete(v);
|
||||
this._idPool.push(id);
|
||||
}
|
||||
},
|
||||
|
||||
// func stringVal(value string) ref
|
||||
"syscall/js.stringVal": (sp) => {
|
||||
sp >>>= 0;
|
||||
storeValue(sp + 24, loadString(sp + 8));
|
||||
},
|
||||
|
||||
// func valueGet(v ref, p string) ref
|
||||
"syscall/js.valueGet": (sp) => {
|
||||
sp >>>= 0;
|
||||
const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 32, result);
|
||||
},
|
||||
|
||||
// func valueSet(v ref, p string, x ref)
|
||||
"syscall/js.valueSet": (sp) => {
|
||||
sp >>>= 0;
|
||||
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
|
||||
},
|
||||
|
||||
// func valueDelete(v ref, p string)
|
||||
"syscall/js.valueDelete": (sp) => {
|
||||
sp >>>= 0;
|
||||
Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
|
||||
},
|
||||
|
||||
// func valueIndex(v ref, i int) ref
|
||||
"syscall/js.valueIndex": (sp) => {
|
||||
sp >>>= 0;
|
||||
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
|
||||
},
|
||||
|
||||
// valueSetIndex(v ref, i int, x ref)
|
||||
"syscall/js.valueSetIndex": (sp) => {
|
||||
sp >>>= 0;
|
||||
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) => {
|
||||
sp >>>= 0;
|
||||
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() >>> 0; // see comment above
|
||||
storeValue(sp + 56, result);
|
||||
this.mem.setUint8(sp + 64, 1);
|
||||
} catch (err) {
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 56, err);
|
||||
this.mem.setUint8(sp + 64, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueInvoke(v ref, args []ref) (ref, bool)
|
||||
"syscall/js.valueInvoke": (sp) => {
|
||||
sp >>>= 0;
|
||||
try {
|
||||
const v = loadValue(sp + 8);
|
||||
const args = loadSliceOfValues(sp + 16);
|
||||
const result = Reflect.apply(v, undefined, args);
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 40, result);
|
||||
this.mem.setUint8(sp + 48, 1);
|
||||
} catch (err) {
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 40, err);
|
||||
this.mem.setUint8(sp + 48, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueNew(v ref, args []ref) (ref, bool)
|
||||
"syscall/js.valueNew": (sp) => {
|
||||
sp >>>= 0;
|
||||
try {
|
||||
const v = loadValue(sp + 8);
|
||||
const args = loadSliceOfValues(sp + 16);
|
||||
const result = Reflect.construct(v, args);
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 40, result);
|
||||
this.mem.setUint8(sp + 48, 1);
|
||||
} catch (err) {
|
||||
sp = this._inst.exports.getsp() >>> 0; // see comment above
|
||||
storeValue(sp + 40, err);
|
||||
this.mem.setUint8(sp + 48, 0);
|
||||
}
|
||||
},
|
||||
|
||||
// func valueLength(v ref) int
|
||||
"syscall/js.valueLength": (sp) => {
|
||||
sp >>>= 0;
|
||||
setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
|
||||
},
|
||||
|
||||
// valuePrepareString(v ref) (ref, int)
|
||||
"syscall/js.valuePrepareString": (sp) => {
|
||||
sp >>>= 0;
|
||||
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) => {
|
||||
sp >>>= 0;
|
||||
const str = loadValue(sp + 8);
|
||||
loadSlice(sp + 16).set(str);
|
||||
},
|
||||
|
||||
// func valueInstanceOf(v ref, t ref) bool
|
||||
"syscall/js.valueInstanceOf": (sp) => {
|
||||
sp >>>= 0;
|
||||
this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
|
||||
},
|
||||
|
||||
// func copyBytesToGo(dst []byte, src ref) (int, bool)
|
||||
"syscall/js.copyBytesToGo": (sp) => {
|
||||
sp >>>= 0;
|
||||
const dst = loadSlice(sp + 8);
|
||||
const src = loadValue(sp + 32);
|
||||
if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
|
||||
this.mem.setUint8(sp + 48, 0);
|
||||
return;
|
||||
}
|
||||
const toCopy = src.subarray(0, dst.length);
|
||||
dst.set(toCopy);
|
||||
setInt64(sp + 40, toCopy.length);
|
||||
this.mem.setUint8(sp + 48, 1);
|
||||
},
|
||||
|
||||
// func copyBytesToJS(dst ref, src []byte) (int, bool)
|
||||
"syscall/js.copyBytesToJS": (sp) => {
|
||||
sp >>>= 0;
|
||||
const dst = loadValue(sp + 8);
|
||||
const src = loadSlice(sp + 16);
|
||||
if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
|
||||
this.mem.setUint8(sp + 48, 0);
|
||||
return;
|
||||
}
|
||||
const toCopy = src.subarray(0, dst.length);
|
||||
dst.set(toCopy);
|
||||
setInt64(sp + 40, toCopy.length);
|
||||
this.mem.setUint8(sp + 48, 1);
|
||||
},
|
||||
|
||||
"debug": (value) => {
|
||||
console.log(value);
|
||||
},
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
async run(instance) {
|
||||
if (!(instance instanceof WebAssembly.Instance)) {
|
||||
throw new Error("Go.run: WebAssembly.Instance expected");
|
||||
}
|
||||
this._inst = instance;
|
||||
this.mem = new DataView(this._inst.exports.mem.buffer);
|
||||
this._values = [ // JS values that Go currently has references to, indexed by reference id
|
||||
NaN,
|
||||
0,
|
||||
null,
|
||||
true,
|
||||
false,
|
||||
global,
|
||||
this,
|
||||
];
|
||||
this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
|
||||
this._ids = new Map([ // mapping from JS values to reference ids
|
||||
[0, 1],
|
||||
[null, 2],
|
||||
[true, 3],
|
||||
[false, 4],
|
||||
[global, 5],
|
||||
[this, 6],
|
||||
]);
|
||||
this._idPool = []; // unused ids that have been garbage collected
|
||||
this.exited = false; // whether the Go program has exited
|
||||
|
||||
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
|
||||
let offset = 4096;
|
||||
|
||||
const strPtr = (str) => {
|
||||
const ptr = offset;
|
||||
const bytes = encoder.encode(str + "\0");
|
||||
new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
|
||||
offset += bytes.length;
|
||||
if (offset % 8 !== 0) {
|
||||
offset += 8 - (offset % 8);
|
||||
}
|
||||
return ptr;
|
||||
};
|
||||
|
||||
const argc = this.argv.length;
|
||||
|
||||
const argvPtrs = [];
|
||||
this.argv.forEach((arg) => {
|
||||
argvPtrs.push(strPtr(arg));
|
||||
});
|
||||
argvPtrs.push(0);
|
||||
|
||||
const keys = Object.keys(this.env).sort();
|
||||
keys.forEach((key) => {
|
||||
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
|
||||
});
|
||||
argvPtrs.push(0);
|
||||
|
||||
const argv = offset;
|
||||
argvPtrs.forEach((ptr) => {
|
||||
this.mem.setUint32(offset, ptr, true);
|
||||
this.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 (
|
||||
typeof module !== "undefined" &&
|
||||
global.require &&
|
||||
global.require.main === module &&
|
||||
global.process &&
|
||||
global.process.versions &&
|
||||
!global.process.versions.electron
|
||||
) {
|
||||
if (process.argv.length < 3) {
|
||||
console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
|
||||
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) => {
|
||||
console.error(err);
|
||||
process.exit(1);
|
||||
});
|
||||
}
|
||||
})();
|
||||
415
wasmtest/wasmmod/wasmmod_js.go
Normal file
415
wasmtest/wasmmod/wasmmod_js.go
Normal file
@ -0,0 +1,415 @@
|
||||
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// The wasmmod is a Tailscale-in-wasm proof of concept.
|
||||
//
|
||||
// See ../index.html and ../term.js for how it ties together.
|
||||
package main
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"bytes"
|
||||
"context"
|
||||
"encoding/base64"
|
||||
"fmt"
|
||||
"html"
|
||||
"io"
|
||||
"log"
|
||||
"net"
|
||||
"net/http"
|
||||
"os"
|
||||
"runtime"
|
||||
"strings"
|
||||
"sync"
|
||||
"syscall/js"
|
||||
"time"
|
||||
|
||||
"github.com/skip2/go-qrcode"
|
||||
"tailscale.com/cmd/tailscale/cli"
|
||||
"tailscale.com/ipn"
|
||||
"tailscale.com/ipn/ipnserver"
|
||||
"tailscale.com/ipn/store/mem"
|
||||
"tailscale.com/net/netns"
|
||||
"tailscale.com/net/packet"
|
||||
"tailscale.com/net/tsdial"
|
||||
"tailscale.com/net/tstun"
|
||||
"tailscale.com/safesocket"
|
||||
"tailscale.com/types/logger"
|
||||
"tailscale.com/wgengine"
|
||||
"tailscale.com/wgengine/filter"
|
||||
"tailscale.com/wgengine/netstack"
|
||||
)
|
||||
|
||||
func main() {
|
||||
netns.SetEnabled(false)
|
||||
var logf logger.Logf = log.Printf
|
||||
|
||||
dialer := new(tsdial.Dialer)
|
||||
eng, err := wgengine.NewUserspaceEngine(logf, wgengine.Config{
|
||||
Dialer: dialer,
|
||||
})
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
tunDev, magicConn, dnsManager, ok := eng.(wgengine.InternalsGetter).GetInternals()
|
||||
if !ok {
|
||||
log.Fatalf("%T is not a wgengine.InternalsGetter", eng)
|
||||
}
|
||||
ns, err := netstack.Create(logf, tunDev, eng, magicConn, dialer, dnsManager)
|
||||
if err != nil {
|
||||
log.Fatalf("netstack.Create: %v", err)
|
||||
}
|
||||
ns.ProcessLocalIPs = true
|
||||
ns.ProcessSubnets = true
|
||||
ns.ForwardTCPIn = handleIncomingTCP
|
||||
if err := ns.Start(); err != nil {
|
||||
log.Fatalf("failed to start netstack: %v", err)
|
||||
}
|
||||
|
||||
doc := js.Global().Get("document")
|
||||
state := doc.Call("getElementById", "state")
|
||||
topBar := doc.Call("getElementById", "topbar")
|
||||
topBarStyle := topBar.Get("style")
|
||||
netmapEle := doc.Call("getElementById", "netmap")
|
||||
loginEle := doc.Call("getElementById", "loginURL")
|
||||
|
||||
netstackHandlePacket := tunDev.PostFilterIn
|
||||
tunDev.PostFilterIn = func(p *packet.Parsed, t *tstun.Wrapper) filter.Response {
|
||||
if p.IsEchoRequest() {
|
||||
go func() {
|
||||
topBarStyle.Set("background", "gray")
|
||||
time.Sleep(100 * time.Millisecond)
|
||||
topBarStyle.Set("background", "white")
|
||||
}()
|
||||
}
|
||||
return netstackHandlePacket(p, t)
|
||||
}
|
||||
|
||||
var store ipn.StateStore = new(mem.Store)
|
||||
srv, err := ipnserver.New(log.Printf, "some-logid", store, eng, dialer, nil, ipnserver.Options{
|
||||
SurviveDisconnects: true,
|
||||
})
|
||||
if err != nil {
|
||||
log.Fatalf("ipnserver.New: %v", err)
|
||||
}
|
||||
lb := srv.LocalBackend()
|
||||
|
||||
state.Set("innerHTML", "ready")
|
||||
|
||||
lb.SetNotifyCallback(func(n ipn.Notify) {
|
||||
log.Printf("NOTIFY: %+v", n)
|
||||
if n.State != nil {
|
||||
state.Set("innerHTML", fmt.Sprint(*n.State))
|
||||
switch *n.State {
|
||||
case ipn.Running, ipn.Starting:
|
||||
loginEle.Set("innerHTML", "")
|
||||
}
|
||||
}
|
||||
if nm := n.NetMap; nm != nil {
|
||||
var buf bytes.Buffer
|
||||
fmt.Fprintf(&buf, "<p>Name: <b>%s</b></p>\n", html.EscapeString(nm.Name))
|
||||
fmt.Fprintf(&buf, "<p>Addresses: ")
|
||||
for i, a := range nm.Addresses {
|
||||
if i == 0 {
|
||||
fmt.Fprintf(&buf, "<b>%s</b>", a.IP())
|
||||
} else {
|
||||
fmt.Fprintf(&buf, ", %s", a.IP())
|
||||
}
|
||||
}
|
||||
fmt.Fprintf(&buf, "</p>")
|
||||
fmt.Fprintf(&buf, "<p>Machine: <b>%v</b>, %v</p>\n", nm.MachineStatus, nm.MachineKey)
|
||||
fmt.Fprintf(&buf, "<p>Nodekey: %v</p>\n", nm.NodeKey)
|
||||
fmt.Fprintf(&buf, "<hr><table>")
|
||||
for _, p := range nm.Peers {
|
||||
var ip string
|
||||
if len(p.Addresses) > 0 {
|
||||
ip = p.Addresses[0].IP().String()
|
||||
}
|
||||
fmt.Fprintf(&buf, "<tr><td>%s</td><td>%s</td></tr>\n", ip, html.EscapeString(p.Name))
|
||||
}
|
||||
fmt.Fprintf(&buf, "</table>")
|
||||
netmapEle.Set("innerHTML", buf.String())
|
||||
}
|
||||
if n.BrowseToURL != nil {
|
||||
esc := html.EscapeString(*n.BrowseToURL)
|
||||
pngBytes, _ := qrcode.Encode(*n.BrowseToURL, qrcode.Medium, 256)
|
||||
qrDataURL := "data:image/png;base64," + base64.StdEncoding.EncodeToString(pngBytes)
|
||||
loginEle.Set("innerHTML", fmt.Sprintf("<a href='%s' target=_blank>%s<br/><img src='%s' border=0></a>", esc, esc, qrDataURL))
|
||||
}
|
||||
})
|
||||
|
||||
start := func() {
|
||||
err := lb.Start(ipn.Options{
|
||||
Prefs: &ipn.Prefs{
|
||||
// go run ./cmd/trunkd/ -remote-url=https://controlplane.tailscale.com
|
||||
//ControlURL: "http://tsdev:8080",
|
||||
ControlURL: "https://controlplane.tailscale.com",
|
||||
RouteAll: false,
|
||||
AllowSingleHosts: true,
|
||||
WantRunning: true,
|
||||
Hostname: "wasm",
|
||||
},
|
||||
})
|
||||
log.Printf("Start error: %v", err)
|
||||
|
||||
}
|
||||
|
||||
js.Global().Set("startClicked", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
go start()
|
||||
return nil
|
||||
}))
|
||||
|
||||
js.Global().Set("logoutClicked", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
log.Printf("Logout clicked")
|
||||
if lb.State() == ipn.NoState {
|
||||
log.Printf("Backend not running")
|
||||
return nil
|
||||
}
|
||||
go lb.Logout()
|
||||
return nil
|
||||
}))
|
||||
|
||||
js.Global().Set("startLoginInteractive", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
log.Printf("State: %v", lb.State)
|
||||
|
||||
go func() {
|
||||
if lb.State() == ipn.NoState {
|
||||
start()
|
||||
}
|
||||
lb.StartLoginInteractive()
|
||||
}()
|
||||
return nil
|
||||
}))
|
||||
|
||||
js.Global().Set("seeGoroutines", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
full := make([]byte, 1<<20)
|
||||
buf := full[:runtime.Stack(full, true)]
|
||||
js.Global().Get("theTerminal").Call("reset")
|
||||
withCR := make([]byte, 0, len(buf)+bytes.Count(buf, []byte{'\n'}))
|
||||
for _, b := range buf {
|
||||
if b == '\n' {
|
||||
withCR = append(withCR, "\r\n"...)
|
||||
} else {
|
||||
withCR = append(withCR, b)
|
||||
}
|
||||
}
|
||||
js.Global().Get("theTerminal").Call("write", string(withCR))
|
||||
return nil
|
||||
}))
|
||||
|
||||
js.Global().Set("startAuthKey", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
authKey := args[0].String()
|
||||
log.Printf("got auth key")
|
||||
go func() {
|
||||
err := lb.Start(ipn.Options{
|
||||
Prefs: &ipn.Prefs{
|
||||
// go run ./cmd/trunkd/ -remote-url=https://controlplane.tailscale.com
|
||||
//ControlURL: "http://tsdev:8080",
|
||||
ControlURL: "https://controlplane.tailscale.com",
|
||||
RouteAll: false,
|
||||
AllowSingleHosts: true,
|
||||
WantRunning: true,
|
||||
Hostname: "wasm",
|
||||
},
|
||||
AuthKey: authKey,
|
||||
})
|
||||
log.Printf("Start error: %v", err)
|
||||
}()
|
||||
return nil
|
||||
}))
|
||||
|
||||
var termOutOnce sync.Once
|
||||
|
||||
js.Global().Set("runTailscaleCLI", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
if len(args) < 1 {
|
||||
log.Printf("missing args")
|
||||
return nil
|
||||
}
|
||||
// TODO(bradfitz): enforce that we're only running one
|
||||
// CLI command at a time, as we modify package cli
|
||||
// globals below, like cli.Fatalf.
|
||||
|
||||
go func() {
|
||||
if len(args) >= 2 {
|
||||
onDone := args[1]
|
||||
defer onDone.Invoke() // re-print the prompt
|
||||
}
|
||||
/*
|
||||
fs := js.Global().Get("globalThis").Get("fs")
|
||||
oldWriteSync := fs.Get("writeSync")
|
||||
defer fs.Set("writeSync", oldWriteSync)
|
||||
|
||||
fs.Set("writeSync", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
if len(args) != 2 {
|
||||
return nil
|
||||
}
|
||||
js.Global().Get("theTerminal").Call("write", fmt.Sprintf("Got a %T %v\r\n", args[1], args[1]))
|
||||
return nil
|
||||
}))
|
||||
*/
|
||||
line := args[0].String()
|
||||
f := strings.Fields(line)
|
||||
term := js.Global().Get("theTerminal")
|
||||
termOutOnce.Do(func() {
|
||||
cli.Stdout = termWriter{term}
|
||||
cli.Stderr = termWriter{term}
|
||||
})
|
||||
|
||||
cli.Fatalf = func(format string, a ...interface{}) {
|
||||
term.Call("write", strings.ReplaceAll(fmt.Sprintf(format, a...), "\n", "\n\r"))
|
||||
runtime.Goexit()
|
||||
}
|
||||
|
||||
// TODO(bradfitz): add a cli package global logger and make that
|
||||
// package use it, rather than messing with log.SetOutput.
|
||||
log.SetOutput(cli.Stderr)
|
||||
defer log.SetOutput(os.Stderr) // back to console
|
||||
|
||||
defer func() {
|
||||
if e := recover(); e != nil {
|
||||
term.Call("write", fmt.Sprintf("%s\r\n", e))
|
||||
fmt.Fprintf(os.Stderr, "recovered panic from %q: %v", f, e)
|
||||
}
|
||||
}()
|
||||
|
||||
if err := cli.Run(f[1:]); err != nil {
|
||||
fmt.Fprintf(os.Stderr, "CLI error on %q: %v\n", f, err)
|
||||
term.Call("write", fmt.Sprintf("%v\r\n", err))
|
||||
return
|
||||
}
|
||||
}()
|
||||
return nil
|
||||
}))
|
||||
|
||||
js.Global().Set("runFakeCURL", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
if len(args) < 2 {
|
||||
log.Printf("missing args")
|
||||
return nil
|
||||
}
|
||||
go func() {
|
||||
onDone := args[1]
|
||||
defer onDone.Invoke() // re-print the prompt
|
||||
|
||||
line := args[0].String()
|
||||
f := strings.Fields(line)
|
||||
if len(f) < 2 {
|
||||
return
|
||||
}
|
||||
wantURL := f[1]
|
||||
|
||||
term := js.Global().Get("theTerminal")
|
||||
|
||||
c := &http.Client{
|
||||
Transport: &http.Transport{
|
||||
DialContext: dialer.UserDial,
|
||||
},
|
||||
}
|
||||
|
||||
res, err := c.Get(wantURL)
|
||||
if err != nil {
|
||||
term.Call("write", fmt.Sprintf("Error: %v\r\n", err))
|
||||
return
|
||||
}
|
||||
defer res.Body.Close()
|
||||
res.Write(termWriter{term})
|
||||
}()
|
||||
return nil
|
||||
}))
|
||||
|
||||
js.Global().Set("runSSH", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
if len(args) < 2 {
|
||||
log.Printf("missing args")
|
||||
return nil
|
||||
}
|
||||
go func() {
|
||||
onDone := args[1]
|
||||
defer onDone.Invoke() // re-print the prompt
|
||||
|
||||
line := args[0].String()
|
||||
f := strings.Fields(line)
|
||||
host := f[1]
|
||||
|
||||
term := js.Global().Get("theTerminal")
|
||||
|
||||
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
||||
defer cancel()
|
||||
c, err := dialer.UserDial(ctx, "tcp", net.JoinHostPort(host, "22"))
|
||||
if err != nil {
|
||||
term.Call("write", fmt.Sprintf("Error: %v\r\n", err))
|
||||
return
|
||||
}
|
||||
defer c.Close()
|
||||
br := bufio.NewReader(c)
|
||||
greet, err := br.ReadString('\n')
|
||||
if err != nil {
|
||||
term.Call("write", fmt.Sprintf("Error: %v\r\n", err))
|
||||
return
|
||||
}
|
||||
term.Call("write", fmt.Sprintf("%v\r\n\r\nTODO(bradfitz): rest of the owl", strings.TrimSpace(greet)))
|
||||
}()
|
||||
return nil
|
||||
}))
|
||||
|
||||
ln, _, err := safesocket.Listen("", 0)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
err = srv.Run(context.Background(), ln)
|
||||
log.Fatalf("ipnserver.Run exited: %v", err)
|
||||
}
|
||||
|
||||
type termWriter struct {
|
||||
o js.Value
|
||||
}
|
||||
|
||||
func (w termWriter) Write(p []byte) (n int, err error) {
|
||||
r := bytes.Replace(p, []byte("\n"), []byte("\n\r"), -1)
|
||||
w.o.Call("write", string(r))
|
||||
return len(p), nil
|
||||
}
|
||||
|
||||
func handleIncomingTCP(c net.Conn, port uint16) {
|
||||
if port != 80 {
|
||||
log.Printf("incoming conn on port %v; closing", port)
|
||||
c.Close()
|
||||
return
|
||||
}
|
||||
log.Printf("incoming conn on port %v", port)
|
||||
s := &http.Server{
|
||||
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
log.Printf("Got HTTP request: %+v", r)
|
||||
if c := strings.TrimPrefix(r.URL.Path, "/"); c != "" {
|
||||
body := js.Global().Get("document").Get("body")
|
||||
body.Set("bgColor", c)
|
||||
}
|
||||
}),
|
||||
}
|
||||
err := s.Serve(&oneConnListener{conn: c})
|
||||
log.Printf("http.Serve: %v", err)
|
||||
}
|
||||
|
||||
type dummyAddr string
|
||||
type oneConnListener struct {
|
||||
conn net.Conn
|
||||
}
|
||||
|
||||
func (l *oneConnListener) Accept() (c net.Conn, err error) {
|
||||
c = l.conn
|
||||
if c == nil {
|
||||
err = io.EOF
|
||||
return
|
||||
}
|
||||
err = nil
|
||||
l.conn = nil
|
||||
return
|
||||
}
|
||||
|
||||
func (l *oneConnListener) Close() error { return nil }
|
||||
|
||||
func (l *oneConnListener) Addr() net.Addr { return dummyAddr("unused-address") }
|
||||
|
||||
func (a dummyAddr) Network() string { return string(a) }
|
||||
func (a dummyAddr) String() string { return string(a) }
|
||||
Loading…
Reference in New Issue
Block a user