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add some more websocket stuff

This commit is contained in:
Zack Scholl 2019-11-11 16:16:16 -08:00
parent 639d4d4d3c
commit e5bfe8530b
8 changed files with 947 additions and 107 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
go.mod
View File

@ -8,4 +8,6 @@ require (
github.com/gorilla/mux v1.7.3
github.com/gorilla/websocket v1.4.1
github.com/schollz/logger v1.0.1
github.com/schollz/pake/v2 v2.0.1
golang.org/x/crypto v0.0.0-20190907121410-71b5226ff739
)

10
go.sum
View File

@ -24,14 +24,24 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
github.com/schollz/croc v3.0.6+incompatible h1:rCfc8MGgcGjNW2/qSoulPh8CRGH+Ej4i3RWYOwhX9pE=
github.com/schollz/logger v1.0.1 h1:BuBAU+euqphM0Ny9qFVScl4RSxatis4nCHIkOxO2cUU=
github.com/schollz/logger v1.0.1/go.mod h1:P6F4/dGMGcx8wh+kG1zrNEd4vnNpEBY/mwEMd/vn6AM=
github.com/schollz/pake v1.1.1 h1:QKeojDWzdAdtRC4m89b6HAxw/8gjqrVu7r4SAOxOFg8=
github.com/schollz/pake/v2 v2.0.1 h1:mvDqzFhKdYw2jG7Wk66DD6qtzkKepQ+Q6vd06rURY0E=
github.com/schollz/pake/v2 v2.0.1/go.mod h1:3uXB571UYJ8Eqh2EEohXe/aO32QID+Varb4GeYA//yw=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/tscholl2/siec v0.0.0-20180721101609-21667da05937 h1:lhssCpSe3TjKcbvUoPzFMuv9oUyZDgI3Cmgolfw2C90=
github.com/tscholl2/siec v0.0.0-20180721101609-21667da05937/go.mod h1:KL9+ubr1JZdaKjgAaHr+tCytEncXBa1pR6FjbTsOJnw=
github.com/ugorji/go v1.1.4 h1:j4s+tAvLfL3bZyefP2SEWmhBzmuIlH/eqNuPdFPgngw=
github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190907121410-71b5226ff739 h1:Gc7JIyxvWgD6m+QmVryY0MstDORNYididDGxgZ6Tnpk=
golang.org/x/crypto v0.0.0-20190907121410-71b5226ff739/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b h1:ag/x1USPSsqHud38I9BAC88qdNLDHHtQ4mlgQIZPPNA=
golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

2
src/relay/relay.go
View File

@ -210,5 +210,5 @@ func Run() (err error) {
log.Debugf("[%s] new connection %+v", room, c)
s.readPump()
})
return router.Run(":8000")
return router.Run(":8005")
}

212
src/webrtc/websend/index.html
View File

@ -1,7 +1,6 @@
<html>
<head>
<script src="https://cdn.jsdelivr.net/gh/emn178/js-md5/build/md5.min.js"></script>
<style>
#byte_content {
@ -19,7 +18,6 @@
</html>
<body>
<input type="file" id="files" name="file" /> Read bytes:
<span class="readBytesButtons">
<button data-startbyte="0" data-endbyte="4">1-5</button>
@ -31,118 +29,120 @@
<div id="byte_content"></div>
Base64: <textarea id="remoteSessionDescription"></textarea> <br />
<button onclick="startSession()"> Send Message </button> <br />
<script>
function readBlob(opt_startByte, opt_stopByte) {
function readBlob(opt_startByte, opt_stopByte) {
var files = document.getElementById('files').files;
if (!files.length) {
alert('Please select a file!');
return;
}
var file = files[0];
var start = parseInt(opt_startByte) || 0;
var stop = parseInt(opt_stopByte) || file.size - 1;
var reader = new FileReader();
// If we use onloadend, we need to check the readyState.
reader.onloadend = function (evt) {
if (evt.target.readyState == FileReader.DONE) { // DONE == 2
document.getElementById('byte_content').textContent = evt.target.result;
document.getElementById('byte_range').textContent =
['Read bytes: ', start + 1, ' - ', stop + 1,
' of ', file.size, ' byte file'].join('');
sendMessage(evt.target.result);
}
};
var blob = file.slice(start, stop + 1);
reader.readAsBinaryString(blob);
var files = document.getElementById('files').files;
if (!files.length) {
alert('Please select a file!');
return;
}
document.querySelector('.readBytesButtons').addEventListener('click', function (evt) {
if (evt.target.tagName.toLowerCase() == 'button') {
var startByte = evt.target.getAttribute('data-startbyte');
var endByte = evt.target.getAttribute('data-endbyte');
readBlob(startByte, endByte);
var file = files[0];
var start = parseInt(opt_startByte) || 0;
var stop = parseInt(opt_stopByte) || file.size - 1;
var reader = new FileReader();
// If we use onloadend, we need to check the readyState.
reader.onloadend = function(evt) {
if (evt.target.readyState == FileReader.DONE) { // DONE == 2
document.getElementById('byte_content').textContent = evt.target.result;
document.getElementById('byte_range').textContent = ['Read bytes: ', start + 1, ' - ', stop + 1,
' of ', file.size, ' byte file'
].join('');
sendMessage(evt.target.result);
}
}, false);
let pc = new RTCPeerConnection({
iceServers: [{
urls: 'stun:stun.l.google.com:19302'
}]
})
let log = msg => {
console.log(msg);
}
pc.onsignalingstatechange = e => log(pc.signalingState)
pc.oniceconnectionstatechange = e => log(pc.iceConnectionState)
pc.onicecandidate = event => {
if (event.candidate === null) {
log(JSON.stringify(pc.localDescription))
}
}
pc.ondatachannel = e => {
let dc = e.channel
log('New DataChannel ' + dc.label)
dc.onclose = () => log('dc has closed')
dc.onopen = () => {
log('dc has opened');
}
dc.onmessage = e => {
log(`Message from DataChannel '${dc.label}' payload '${e.data}'`)
}
window.sendMessage = e => {
let message = e;
if (message === '') {
return alert('Message must not be empty')
}
dc.send(message)
}
}
window.startSession = () => {
pc.setRemoteDescription(new RTCSessionDescription(JSON.parse(atob(document.getElementById('remoteSessionDescription').value)))).catch(log)
pc.createAnswer().then(d => pc.setLocalDescription(d)).catch(log)
}
// websockets
var socket;
const socketMessageListener = (event) => {
log(event);
};
const socketOpenListener = (event) => {
log('Connected');
var blob = file.slice(start, stop + 1);
reader.readAsBinaryString(blob);
}
document.querySelector('.readBytesButtons').addEventListener('click', function(evt) {
if (evt.target.tagName.toLowerCase() == 'button') {
var startByte = evt.target.getAttribute('data-startbyte');
var endByte = evt.target.getAttribute('data-endbyte');
readBlob(startByte, endByte);
}
const socketCloseListener = (event) => {
if (socket) {
log('Disconnected.');
}, false);
let pc = new RTCPeerConnection({
iceServers: [{
urls: 'stun:stun.l.google.com:19302'
}]
})
let log = msg => {
console.log(msg);
}
pc.onsignalingstatechange = e => log(pc.signalingState)
pc.oniceconnectionstatechange = e => log(pc.iceConnectionState)
pc.onicecandidate = event => {
if (event.candidate === null) {
log(JSON.stringify(pc.localDescription))
}
}
pc.ondatachannel = e => {
let dc = e.channel
log('New DataChannel ' + dc.label)
dc.onclose = () => log('dc has closed')
dc.onopen = () => {
log('dc has opened');
}
dc.onmessage = e => {
log(`Message from DataChannel '${dc.label}' payload '${e.data}'`)
}
window.sendMessage = e => {
let message = e;
if (message === '') {
return alert('Message must not be empty')
}
// var ws_url = window.origin.replace("http", "ws") + '/ws/test1';
var ws_url = "ws://localhost:8000/ws/test1";
log(`connecting to '${ws_url}'`)
socket = new WebSocket(ws_url);
socket.addEventListener('open', socketOpenListener);
socket.addEventListener('message', socketMessageListener);
socket.addEventListener('close', socketCloseListener);
};
socketCloseListener();
dc.send(message)
}
}
window.startSession = () => {
pc.setRemoteDescription(new RTCSessionDescription(JSON.parse(atob(document.getElementById('remoteSessionDescription').value)))).catch(log)
pc.createAnswer().then(d => pc.setLocalDescription(d)).catch(log)
}
// websockets
var socket;
const socketMessageListener = (event) => {
log(event);
};
const socketOpenListener = (event) => {
log('Connected');
}
const socketCloseListener = (event) => {
if (socket) {
log('Disconnected.');
}
// var ws_url = window.origin.replace("http", "ws") + '/ws/test1';
var ws_url = "ws://localhost:8005/ws/test1";
log(`connecting to '${ws_url}'`)
socket = new WebSocket(ws_url);
socket.addEventListener('open', socketOpenListener);
socket.addEventListener('message', socketMessageListener);
socket.addEventListener('close', socketCloseListener);
};
socketCloseListener();
</script>
<script src="wasm_exec.js"></script>
<script>
const go = new Go();
WebAssembly.instantiateStreaming(fetch("main.wasm"), go.importObject).then((result) => {
go.run(result.instance);
});
</script>
</body>

263
src/webrtc/websend/main.go Normal file
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@ -0,0 +1,263 @@
package main
//go:generate cp /usr/local/go/misc/wasm/wasm_exec.js .
// compile with
// GOOS=js GOARCH=wasm go build -o main.wasm
// to run
//
// bob = pakeInit("pass1","0");
// jane = pakeInit("pass1","1");
// jane = pakeUpdate(jane,pakePublic(bob));
// bob = pakeUpdate(bob,pakePublic(jane));
// jane = pakeUpdate(jane,pakePublic(bob));
// console.log(pakeSessionKey(bob))
// console.log(pakeSessionKey(jane))
import (
"bytes"
"compress/flate"
"crypto/aes"
"crypto/cipher"
"crypto/elliptic"
"crypto/rand"
"crypto/sha256"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"syscall/js"
"time"
"github.com/schollz/pake/v2"
"golang.org/x/crypto/pbkdf2"
)
// CompressWithOption returns compressed data using the specified level
func CompressWithOption(src []byte, level int) []byte {
compressedData := new(bytes.Buffer)
compress(src, compressedData, level)
return compressedData.Bytes()
}
// Compress returns a compressed byte slice.
func Compress(src []byte) []byte {
compressedData := new(bytes.Buffer)
compress(src, compressedData, -2)
return compressedData.Bytes()
}
// Decompress returns a decompressed byte slice.
func Decompress(src []byte) []byte {
compressedData := bytes.NewBuffer(src)
deCompressedData := new(bytes.Buffer)
decompress(compressedData, deCompressedData)
return deCompressedData.Bytes()
}
// compress uses flate to compress a byte slice to a corresponding level
func compress(src []byte, dest io.Writer, level int) {
compressor, _ := flate.NewWriter(dest, level)
compressor.Write(src)
compressor.Close()
}
// compress uses flate to decompress an io.Reader
func decompress(src io.Reader, dest io.Writer) {
decompressor := flate.NewReader(src)
io.Copy(dest, decompressor)
decompressor.Close()
}
// ENCRYPTION
type Encryption struct {
key []byte
passphrase []byte
salt []byte
}
// New generates a new Encryption, using the supplied passphrase and
// an optional supplied salt.
// Passing nil passphrase will not use decryption.
func NewEncryption(passphrase []byte, salt []byte) (e Encryption, err error) {
if passphrase == nil {
e = Encryption{nil, nil, nil}
return
}
e.passphrase = passphrase
if salt == nil {
e.salt = make([]byte, 8)
// http://www.ietf.org/rfc/rfc2898.txt
// Salt.
rand.Read(e.salt)
} else {
e.salt = salt
}
e.key = pbkdf2.Key([]byte(passphrase), e.salt, 100, 32, sha256.New)
return
}
func (e Encryption) Salt() []byte {
return e.salt
}
// Encrypt will generate an Encryption, prefixed with the IV
func (e Encryption) Encrypt(plaintext []byte) (encrypted []byte, err error) {
plaintext = Compress(plaintext)
if e.passphrase == nil {
encrypted = plaintext
return
}
// generate a random iv each time
// http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf
// Section 8.2
ivBytes := make([]byte, 12)
rand.Read(ivBytes)
b, err := aes.NewCipher(e.key)
if err != nil {
return
}
aesgcm, err := cipher.NewGCM(b)
if err != nil {
return
}
encrypted = aesgcm.Seal(nil, ivBytes, plaintext, nil)
encrypted = append(ivBytes, encrypted...)
return
}
// Decrypt an Encryption
func (e Encryption) Decrypt(encrypted []byte) (plaintext []byte, err error) {
if e.passphrase == nil {
plaintext = encrypted
return
}
b, err := aes.NewCipher(e.key)
if err != nil {
return
}
aesgcm, err := cipher.NewGCM(b)
if err != nil {
return
}
plaintext, err = aesgcm.Open(nil, encrypted[:12], encrypted[12:], nil)
if err != nil {
return
}
plaintext = Decompress(plaintext)
return
}
// encrypt(message,password,salt)
func encrypt(this js.Value, inputs []js.Value) interface{} {
if len(inputs) != 3 {
return js.Global().Get("Error").New("not enough inputs")
}
e, err := NewEncryption([]byte(inputs[1].String()), []byte(inputs[2].String()))
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
enc, err := e.Encrypt([]byte(inputs[0].String()))
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
return base64.StdEncoding.EncodeToString(enc)
}
// decrypt(message,password,salt)
func decrypt(this js.Value, inputs []js.Value) interface{} {
e, err := NewEncryption([]byte(inputs[1].String()), []byte(inputs[2].String()))
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
decBytes, err := base64.StdEncoding.DecodeString(inputs[0].String())
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
dec, err := e.Decrypt(decBytes)
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
return string(dec)
}
// initPake(weakPassphrase, role)
// returns: pakeBytes
func pakeInit(this js.Value, inputs []js.Value) interface{} {
// initialize sender P ("0" indicates sender)
if len(inputs) != 2 {
return js.Global().Get("Error").New("need weakPassphrase, role")
}
role := 0
if inputs[1].String() == "1" {
role = 1
}
P, err := pake.Init([]byte(inputs[0].String()), role, elliptic.P521(), 1*time.Millisecond)
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
bJSON, _ := json.Marshal(P)
return string(bJSON)
}
// pakeUpdate(pakeBytes,otherPublicPakeBytes)
func pakeUpdate(this js.Value, inputs []js.Value) interface{} {
if len(inputs) != 2 {
return js.Global().Get("Error").New("need two input")
}
var P, Q *pake.Pake
err := json.Unmarshal([]byte(inputs[0].String()), &P)
P.SetCurve(elliptic.P521())
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
err = json.Unmarshal([]byte(inputs[1].String()), &Q)
Q.SetCurve(elliptic.P521())
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
P.Update(Q.Bytes())
bJSON, _ := json.Marshal(P)
return string(bJSON)
}
// pakePublic(pakeBytes)
func pakePublic(this js.Value, inputs []js.Value) interface{} {
var P *pake.Pake
err := json.Unmarshal([]byte(inputs[0].String()), &P)
P.SetCurve(elliptic.P521())
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
return string(P.Public().Bytes())
}
// pakeSessionKey(pakeBytes)
func pakeSessionKey(this js.Value, inputs []js.Value) interface{} {
var P *pake.Pake
err := json.Unmarshal([]byte(inputs[0].String()), &P)
P.SetCurve(elliptic.P521())
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
key, err := P.SessionKey()
if err != nil {
return js.Global().Get("Error").New(err.Error())
}
return base64.StdEncoding.EncodeToString(key)
}
func main() {
c := make(chan bool)
fmt.Println("starting")
js.Global().Set("encrypt", js.FuncOf(encrypt))
js.Global().Set("decrypt", js.FuncOf(decrypt))
js.Global().Set("pakeInit", js.FuncOf(pakeInit))
js.Global().Set("pakePublic", js.FuncOf(pakePublic))
js.Global().Set("pakeUpdate", js.FuncOf(pakeUpdate))
js.Global().Set("pakeSessionKey", js.FuncOf(pakeSessionKey))
fmt.Println("Initiated")
<-c
}

BIN
src/webrtc/websend/main.wasm Executable file
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Binary file not shown.

533
src/webrtc/websend/wasm_exec.js Normal file
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@ -0,0 +1,533 @@
// 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
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) {
global.fs = require("fs");
}
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) {
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);
},
};
}
if (!global.crypto) {
const nodeCrypto = require("crypto");
global.crypto = {
getRandomValues(b) {
nodeCrypto.randomFillSync(b);
},
};
}
if (!global.performance) {
global.performance = {
now() {
const [sec, nsec] = process.hrtime();
return sec * 1000 + nsec / 1000000;
},
};
}
if (!global.TextEncoder) {
global.TextEncoder = require("util").TextEncoder;
}
if (!global.TextDecoder) {
global.TextDecoder = require("util").TextDecoder;
}
// 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 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();
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
));
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));
},
// func copyBytesToGo(dst []byte, src ref) (int, bool)
"syscall/js.copyBytesToGo": (sp) => {
const dst = loadSlice(sp + 8);
const src = loadValue(sp + 32);
if (!(src instanceof Uint8Array)) {
mem().setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
mem().setUint8(sp + 48, 1);
},
// func copyBytesToJS(dst ref, src []byte) (int, bool)
"syscall/js.copyBytesToJS": (sp) => {
const dst = loadValue(sp + 8);
const src = loadSlice(sp + 16);
if (!(dst instanceof Uint8Array)) {
mem().setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
mem().setUint8(sp + 48, 1);
},
"debug": (value) => {
console.log(value);
},
}
};
}
async run(instance) {
this._inst = instance;
this._values = [ // TODO: garbage collection
NaN,
0,
null,
true,
false,
global,
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) => {
const ptr = offset;
const bytes = encoder.encode(str + "\0");
new Uint8Array(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));
});
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 (
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);
});
}
})();

32
src/wsclient/wsclient.go Normal file
View File

@ -0,0 +1,32 @@
package wsclient
import (
"net/url"
"github.com/gorilla/websocket"
log "github.com/schollz/logger"
)
func Connect() (err error) {
u := url.URL{Scheme: "ws", Host: "localhost", Path: "/ws/test1"}
log.Debugf("connecting to %s", u.String())
c, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
if err != nil {
log.Error("dial:", err)
return
}
defer c.Close()
go func() {
for {
_, message, err := c.ReadMessage()
if err != nil {
log.Println("read:", err)
return
}
log.Printf("recv: %s", message)
}
}()
}