Added test files, added support for WritableStreams, made it work more than once, made it work with io.ReadAll
This commit is contained in:
parent
ef3a1032b4
commit
e19b039954
97
main.go
97
main.go
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@ -3,6 +3,7 @@ package jsStreams
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import (
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"errors"
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"fmt"
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"io"
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"sync"
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"syscall/js"
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@ -11,7 +12,6 @@ import (
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// ReadableStream implements io.ReaderCloser for a JavaScript ReadableStream.
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type ReadableStream struct {
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stream js.Value
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reader js.Value
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lock sync.Mutex
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}
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@ -31,19 +31,17 @@ func (r *ReadableStream) Read(inputBytes []byte) (n int, err error) {
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var waitGroup sync.WaitGroup
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waitGroup.Add(1)
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if r.reader.IsUndefined() {
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r.reader = r.stream.Call("getReader", map[string]interface{}{"mode": "byob"})
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}
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reader := r.stream.Call("getReader", map[string]interface{}{"mode": "byob"})
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resultBuffer := js.Global().Get("Uint8Array").New(len(inputBytes))
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readResult := r.reader.Call("read", resultBuffer)
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readResult := reader.Call("read", resultBuffer)
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readResult.Call("then", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
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defer waitGroup.Done()
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data := args[0].Get("value")
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js.CopyBytesToGo(inputBytes, data)
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if args[0].Get("done").Bool() {
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err = errors.New("EOF")
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err = io.EOF
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}
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n = data.Length()
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return nil
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@ -56,6 +54,8 @@ func (r *ReadableStream) Read(inputBytes []byte) (n int, err error) {
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}))
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waitGroup.Wait()
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reader.Call("releaseLock")
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r.lock.Unlock()
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return n, err
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}
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@ -71,13 +71,88 @@ func (r *ReadableStream) Close() (err error) {
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}
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}()
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if !r.reader.IsUndefined() {
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r.reader.Call("cancel")
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}
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r.lock.Lock()
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r.stream.Call("cancel")
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r.lock.Unlock()
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return nil
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}
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// NewReadableStream creates a new ReadableStream from a JavaScript ReadableStream.
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func NewReadableStream(stream js.Value) *ReadableStream {
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return &ReadableStream{stream: stream}
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}
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type WritableStream struct {
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stream js.Value
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lock sync.Mutex
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}
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func (w *WritableStream) Write(p []byte) (n int, err error) {
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defer func() {
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recovered := recover()
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if recovered != nil {
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err = fmt.Errorf("panic: %v", recovered)
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}
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}()
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w.lock.Lock()
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var waitGroup sync.WaitGroup
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waitGroup.Add(2)
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writer := w.stream.Call("getWriter")
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writer.Get("ready").Call("then", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
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defer waitGroup.Done()
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buffer := js.Global().Get("Uint8Array").New(len(p))
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js.CopyBytesToJS(buffer, p)
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writeResult := writer.Call("write", buffer)
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writeResult.Call("then", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
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defer waitGroup.Done()
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n = len(p)
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return nil
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}))
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writeResult.Call("catch", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
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defer waitGroup.Done()
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err = errors.New(args[0].Get("message").String())
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return nil
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}))
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return nil
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}))
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waitGroup.Wait()
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writer.Call("releaseLock")
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w.lock.Unlock()
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return n, err
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}
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func (w *WritableStream) Close() (err error) {
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defer func() {
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recovered := recover()
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if recovered != nil {
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err = fmt.Errorf("panic: %v", recovered)
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}
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}()
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w.lock.Lock()
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w.stream.Call("close")
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w.lock.Unlock()
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return nil
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}
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func NewReadableStream(stream js.Value) *ReadableStream {
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return &ReadableStream{stream: stream}
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// NewWritableStream creates a new WritableStream. If a JavaScript WritableStream is provided, it will be used.
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// Otherwise, a new WritableStream will be created.
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func NewWritableStream(stream ...js.Value) *WritableStream {
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if len(stream) > 0 {
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return &WritableStream{stream: stream[0]}
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} else {
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stream := js.Global().Get("WritableStream").New()
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return &WritableStream{stream: stream}
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}
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}
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@ -0,0 +1,3 @@
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# These are not unit tests
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Open index.html in a browser to try to use them as JS functions. These are not unit tests, and are just a non-automated way to test the functionality of the library in a browser.
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@ -0,0 +1 @@
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GOOS=js GOARCH=wasm go build -o main.wasm
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@ -0,0 +1,593 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Wasm-Tester</title>
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<script>
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// @license magnet:?xt=urn:btih:c80d50af7d3db9be66a4d0a86db0286e4fd33292&dn=bsd-3-clause.txt BSD-3-Clause
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/*
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* wasm_exec (https://github.com/golang/go)
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* (c) The Go Authors
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* @license BSD-3-Clause
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*/
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"use strict";
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(() => {
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const enosys = () => {
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const err = new Error("not implemented");
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err.code = "ENOSYS";
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return err;
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};
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if (!globalThis.fs) {
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let outputBuf = "";
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globalThis.fs = {
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constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
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writeSync(fd, buf) {
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outputBuf += decoder.decode(buf);
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const nl = outputBuf.lastIndexOf("\n");
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if (nl != -1) {
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console.log(outputBuf.substring(0, nl));
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outputBuf = outputBuf.substring(nl + 1);
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}
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return buf.length;
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},
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write(fd, buf, offset, length, position, callback) {
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if (offset !== 0 || length !== buf.length || position !== null) {
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callback(enosys());
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return;
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}
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const n = this.writeSync(fd, buf);
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callback(null, n);
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},
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chmod(path, mode, callback) { callback(enosys()); },
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chown(path, uid, gid, callback) { callback(enosys()); },
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close(fd, callback) { callback(enosys()); },
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fchmod(fd, mode, callback) { callback(enosys()); },
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fchown(fd, uid, gid, callback) { callback(enosys()); },
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fstat(fd, callback) { callback(enosys()); },
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fsync(fd, callback) { callback(null); },
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ftruncate(fd, length, callback) { callback(enosys()); },
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lchown(path, uid, gid, callback) { callback(enosys()); },
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link(path, link, callback) { callback(enosys()); },
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lstat(path, callback) { callback(enosys()); },
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mkdir(path, perm, callback) { callback(enosys()); },
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open(path, flags, mode, callback) { callback(enosys()); },
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read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
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readdir(path, callback) { callback(enosys()); },
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readlink(path, callback) { callback(enosys()); },
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rename(from, to, callback) { callback(enosys()); },
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rmdir(path, callback) { callback(enosys()); },
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stat(path, callback) { callback(enosys()); },
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symlink(path, link, callback) { callback(enosys()); },
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truncate(path, length, callback) { callback(enosys()); },
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unlink(path, callback) { callback(enosys()); },
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utimes(path, atime, mtime, callback) { callback(enosys()); },
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};
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}
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if (!globalThis.process) {
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globalThis.process = {
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getuid() { return -1; },
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getgid() { return -1; },
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geteuid() { return -1; },
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getegid() { return -1; },
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getgroups() { throw enosys(); },
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pid: -1,
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ppid: -1,
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umask() { throw enosys(); },
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cwd() { throw enosys(); },
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chdir() { throw enosys(); },
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}
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}
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if (!globalThis.crypto) {
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throw new Error("globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)");
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}
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if (!globalThis.performance) {
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throw new Error("globalThis.performance is not available, polyfill required (performance.now only)");
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}
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if (!globalThis.TextEncoder) {
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throw new Error("globalThis.TextEncoder is not available, polyfill required");
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}
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if (!globalThis.TextDecoder) {
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throw new Error("globalThis.TextDecoder is not available, polyfill required");
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}
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const encoder = new TextEncoder("utf-8");
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const decoder = new TextDecoder("utf-8");
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globalThis.Go = class {
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constructor() {
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this.argv = ["js"];
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this.env = {};
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this.exit = (code) => {
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if (code !== 0) {
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console.warn("exit code:", code);
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}
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};
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this._exitPromise = new Promise((resolve) => {
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this._resolveExitPromise = resolve;
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});
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this._pendingEvent = null;
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this._scheduledTimeouts = new Map();
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this._nextCallbackTimeoutID = 1;
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const setInt64 = (addr, v) => {
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this.mem.setUint32(addr + 0, v, true);
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this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
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}
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const setInt32 = (addr, v) => {
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this.mem.setUint32(addr + 0, v, true);
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}
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const getInt64 = (addr) => {
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const low = this.mem.getUint32(addr + 0, true);
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const high = this.mem.getInt32(addr + 4, true);
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return low + high * 4294967296;
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}
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const loadValue = (addr) => {
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const f = this.mem.getFloat64(addr, true);
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if (f === 0) {
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return undefined;
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}
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if (!isNaN(f)) {
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return f;
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}
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const id = this.mem.getUint32(addr, true);
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return this._values[id];
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}
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const storeValue = (addr, v) => {
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const nanHead = 0x7FF80000;
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if (typeof v === "number" && v !== 0) {
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if (isNaN(v)) {
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this.mem.setUint32(addr + 4, nanHead, true);
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this.mem.setUint32(addr, 0, true);
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return;
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}
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this.mem.setFloat64(addr, v, true);
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return;
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}
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if (v === undefined) {
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this.mem.setFloat64(addr, 0, true);
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return;
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}
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let id = this._ids.get(v);
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if (id === undefined) {
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id = this._idPool.pop();
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if (id === undefined) {
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id = this._values.length;
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}
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this._values[id] = v;
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this._goRefCounts[id] = 0;
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this._ids.set(v, id);
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}
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this._goRefCounts[id]++;
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let typeFlag = 0;
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switch (typeof v) {
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case "object":
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if (v !== null) {
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typeFlag = 1;
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}
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break;
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case "string":
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typeFlag = 2;
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break;
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case "symbol":
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typeFlag = 3;
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break;
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case "function":
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typeFlag = 4;
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break;
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}
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this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
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this.mem.setUint32(addr, id, true);
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}
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const loadSlice = (addr) => {
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const array = getInt64(addr + 0);
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const len = getInt64(addr + 8);
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return new Uint8Array(this._inst.exports.mem.buffer, array, len);
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}
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const loadSliceOfValues = (addr) => {
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const array = getInt64(addr + 0);
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const len = getInt64(addr + 8);
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const a = new Array(len);
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for (let i = 0; i < len; i++) {
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a[i] = loadValue(array + i * 8);
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}
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return a;
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}
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const loadString = (addr) => {
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const saddr = getInt64(addr + 0);
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const len = getInt64(addr + 8);
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return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
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}
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const timeOrigin = Date.now() - performance.now();
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this.importObject = {
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_gotest: {
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add: (a, b) => a + b,
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},
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gojs: {
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// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
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// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
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// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
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// This changes the SP, thus we have to update the SP used by the imported function.
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// func wasmExit(code int32)
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"runtime.wasmExit": (sp) => {
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sp >>>= 0;
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const code = this.mem.getInt32(sp + 8, true);
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this.exited = true;
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delete this._inst;
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delete this._values;
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delete this._goRefCounts;
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delete this._ids;
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delete this._idPool;
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this.exit(code);
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},
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// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
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"runtime.wasmWrite": (sp) => {
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sp >>>= 0;
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const fd = getInt64(sp + 8);
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const p = getInt64(sp + 16);
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const n = this.mem.getInt32(sp + 24, true);
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fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
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},
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// func resetMemoryDataView()
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"runtime.resetMemoryDataView": (sp) => {
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sp >>>= 0;
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this.mem = new DataView(this._inst.exports.mem.buffer);
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},
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// func nanotime1() int64
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"runtime.nanotime1": (sp) => {
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sp >>>= 0;
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setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
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},
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// func walltime() (sec int64, nsec int32)
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"runtime.walltime": (sp) => {
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sp >>>= 0;
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const msec = (new Date).getTime();
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setInt64(sp + 8, msec / 1000);
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this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
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},
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// func scheduleTimeoutEvent(delay int64) int32
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"runtime.scheduleTimeoutEvent": (sp) => {
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sp >>>= 0;
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const id = this._nextCallbackTimeoutID;
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this._nextCallbackTimeoutID++;
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this._scheduledTimeouts.set(id, setTimeout(
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() => {
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this._resume();
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while (this._scheduledTimeouts.has(id)) {
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// for some reason Go failed to register the timeout event, log and try again
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// (temporary workaround for https://github.com/golang/go/issues/28975)
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console.warn("scheduleTimeoutEvent: missed timeout event");
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this._resume();
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}
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},
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getInt64(sp + 8),
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));
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this.mem.setInt32(sp + 16, id, true);
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},
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// func clearTimeoutEvent(id int32)
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"runtime.clearTimeoutEvent": (sp) => {
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sp >>>= 0;
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const id = this.mem.getInt32(sp + 8, true);
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clearTimeout(this._scheduledTimeouts.get(id));
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this._scheduledTimeouts.delete(id);
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},
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// func getRandomData(r []byte)
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"runtime.getRandomData": (sp) => {
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sp >>>= 0;
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crypto.getRandomValues(loadSlice(sp + 8));
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},
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// func finalizeRef(v ref)
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"syscall/js.finalizeRef": (sp) => {
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sp >>>= 0;
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const id = this.mem.getUint32(sp + 8, true);
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this._goRefCounts[id]--;
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if (this._goRefCounts[id] === 0) {
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const v = this._values[id];
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this._values[id] = null;
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this._ids.delete(v);
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this._idPool.push(id);
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}
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},
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// func stringVal(value string) ref
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"syscall/js.stringVal": (sp) => {
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sp >>>= 0;
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storeValue(sp + 24, loadString(sp + 8));
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},
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// func valueGet(v ref, p string) ref
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"syscall/js.valueGet": (sp) => {
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sp >>>= 0;
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const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
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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,
|
||||
globalThis,
|
||||
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],
|
||||
[globalThis, 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;
|
||||
});
|
||||
|
||||
// The linker guarantees global data starts from at least wasmMinDataAddr.
|
||||
// Keep in sync with cmd/link/internal/ld/data.go:wasmMinDataAddr.
|
||||
const wasmMinDataAddr = 4096 + 8192;
|
||||
if (offset >= wasmMinDataAddr) {
|
||||
throw new Error("total length of command line and environment variables exceeds limit");
|
||||
}
|
||||
|
||||
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;
|
||||
};
|
||||
}
|
||||
}
|
||||
})();
|
||||
|
||||
// @license-end
|
||||
// @license magnet:?xt=urn:btih:0ef1b8170b3b615170ff270def6427c317705f85&dn=lgpl-3.0.txt LGPL-3.0
|
||||
|
||||
/*
|
||||
* jsStreams_tester
|
||||
* (c) Arzumify
|
||||
* @license LGPL-3.0
|
||||
*/
|
||||
|
||||
const go = new Go();
|
||||
WebAssembly.instantiateStreaming(fetch("main.wasm"), go.importObject).then((result) => {
|
||||
go.run(result.instance);
|
||||
})
|
||||
|
||||
// @license-end
|
||||
</script>
|
||||
</head>
|
||||
<body>
|
||||
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -0,0 +1,45 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"git.ailur.dev/ailur/jsStreams"
|
||||
|
||||
"fmt"
|
||||
"io"
|
||||
|
||||
"syscall/js"
|
||||
)
|
||||
|
||||
// NOTE: Please do not use this code as an example. It never closes the stream and will leak memory.
|
||||
// It is intended for use in the developer console, where you can close the stream via JavaScript.
|
||||
|
||||
func main() {
|
||||
js.Global().Set("TryReadStream", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
go func() {
|
||||
readStream := jsStreams.NewReadableStream(args[0])
|
||||
var buffer []byte
|
||||
buffer, err := io.ReadAll(readStream)
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
return
|
||||
}
|
||||
fmt.Println(string(buffer))
|
||||
}()
|
||||
|
||||
return nil
|
||||
}))
|
||||
|
||||
js.Global().Set("TryWriteStream", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
|
||||
go func() {
|
||||
writeStream := jsStreams.NewWritableStream(args[0])
|
||||
_, err := writeStream.Write([]byte(args[1].String()))
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
return
|
||||
}
|
||||
}()
|
||||
|
||||
return nil
|
||||
}))
|
||||
|
||||
select {}
|
||||
}
|
||||
Loading…
Reference in New Issue