chore: v2.0.5

fix: avoids closing cancelled readablestream
chore: rebuilds hello-sse example
2026-01-12 10:09:12 +00:00 · 2024-12-09 23:12:31 +01:00 · 2024-12-09 23:11:17 +01:00 · 2024-12-09 22:46:00 +01:00 · 2024-11-27 22:33:50 +01:00 · 2024-11-27 22:32:19 +01:00
14 changed files with 106 additions and 35 deletions
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ Create a ServiceWorker file with the following code:
 📄 `sw.js`
 ```js
 importScripts('https://cdn.jsdelivr.net/gh/golang/go@go1.18.4/misc/wasm/wasm_exec.js')
-importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.2/sw.js')
+importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.5/sw.js')

 registerWasmHTTPListener('path/to/server.wasm')
 ```
--- a/docs/hello-sse/api.wasm
+++ b/docs/hello-sse/api.wasm
--- a/docs/hello-sse/index.html
+++ b/docs/hello-sse/index.html
@@ -1,32 +1,57 @@
 <!DOCTYPE html>
 <html>
  <head>
-    <title>go-wasm-http-server hello demo</title>
+    <title>go-wasm-http-server hello sse demo</title>
    <script>
      navigator.serviceWorker.register('sw.js')
        .then(registration => {
          const serviceWorker = registration.installing ?? registration.waiting ?? registration.active
          if (serviceWorker.state === 'activated') {
-            startEventSource()
+            document.querySelector('#open-button').disabled = false
          } else {
            serviceWorker.addEventListener('statechange', e => {
-              if (e.target.state === 'activated') startEventSource()
+              if (e.target.state === 'activated') {
+                document.querySelector('#open-button').disabled = false
+              }
            })
          }
        })
      
-      function startEventSource() {
-        const es = new EventSource('/api/events')
-        es.addEventListener('ping', (e) => {
-          const p = document.createElement('p')
-          p.textContent = `ping: data=${e.data}`
-          document.body.append(p)
+      window.addEventListener('DOMContentLoaded', () => {
+        let es;
+
+        document.querySelector('#open-button').addEventListener('click', () => {
+          if (es && es.readyState === es.OPEN) return
+          es = new EventSource('api/events')
+          es.addEventListener('ping', (e) => {
+            const li = document.createElement('li')
+            li.textContent = `ping: data=${e.data}`
+            document.querySelector('ul').append(li)
+          })
        })
+
+        document.querySelector('#close-button').addEventListener('click', () => {
+          if (!es) return
+          es.close() 
+        })
+
+        document.querySelector('#clear-button').addEventListener('click', () => {
+          document.querySelector('ul').innerHTML = ''
+        })
+
        window.addEventListener('unload', () => {
+          if (!es) return
          es.close()
        })
-      }
+      })
    </script>
  </head>
-  <body></body>
+  <body>
+    <p>
+      <button id="open-button" disabled>Open event source</button>
+      <button id="close-button">Close event source</button>
+      <button id="clear-button">Clear events</button>
+    </p>
+    <ul></ul>
+  </body>
 </html>
--- a/docs/hello-sse/sw.js
+++ b/docs/hello-sse/sw.js
@@ -1,12 +1,14 @@
 importScripts('https://cdn.jsdelivr.net/gh/golang/go@go1.23.1/misc/wasm/wasm_exec.js')
-importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.2/sw.js')
+importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.5/sw.js')
+
+const wasm = 'api.wasm'

 addEventListener('install', (event) => {
-  event.waitUntil(skipWaiting())
+  event.waitUntil(caches.open('examples').then((cache) => cache.add(wasm)))
 })

-addEventListener('activate', event => {
+addEventListener('activate', (event) => {
  event.waitUntil(clients.claim())
 })

-registerWasmHTTPListener('api.wasm', { base: 'api' })
+registerWasmHTTPListener(wasm, { base: 'api' })
--- a/docs/hello-state-keepalive/index.html
+++ b/docs/hello-state-keepalive/index.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
  <head>
-    <title>go-wasm-http-server hello with state demo</title>
+    <title>go-wasm-http-server hello with state and keepalive demo</title>
    <script>
      navigator.serviceWorker.register('sw.js').then(registration => {
        const sw = registration.active ?? registration.installing ?? registration.waiting
--- a/docs/hello-state-keepalive/sw.js
+++ b/docs/hello-state-keepalive/sw.js
@@ -1,8 +1,10 @@
 importScripts('https://cdn.jsdelivr.net/gh/golang/go@go1.23.1/misc/wasm/wasm_exec.js')
-importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.2/sw.js')
+importScripts('../sw.js')
+
+const wasm = '../hello-state/api.wasm'

 addEventListener('install', event => {
-  event.waitUntil(skipWaiting())
+  event.waitUntil(caches.open('hello-state').then((cache) => cache.add(wasm)))
 })
  
 addEventListener('activate', event => {
@@ -11,4 +13,4 @@ addEventListener('activate', event => {

 addEventListener('message', () => {})

-registerWasmHTTPListener('../hello-state/api.wasm', { base: 'api' })
+registerWasmHTTPListener(wasm, { base: 'api' })
--- a/docs/hello-state/api.wasm
+++ b/docs/hello-state/api.wasm
--- a/docs/hello-state/sw.js
+++ b/docs/hello-state/sw.js
@@ -1,12 +1,14 @@
 importScripts('https://cdn.jsdelivr.net/gh/golang/go@go1.23.1/misc/wasm/wasm_exec.js')
-importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.2/sw.js')
+importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.5/sw.js')
+
+const wasm = 'api.wasm'

 addEventListener('install', (event) => {
-  event.waitUntil(skipWaiting())
+  event.waitUntil(caches.open('examples').then((cache) => cache.add(wasm)))
 })
  
-addEventListener('activate', event => {
+addEventListener('activate', (event) => {
  event.waitUntil(clients.claim())
 })

-registerWasmHTTPListener('api.wasm', { base: 'api' })
+registerWasmHTTPListener(wasm, { base: 'api' })
--- a/docs/hello/api.wasm
+++ b/docs/hello/api.wasm
--- a/docs/hello/sw.js
+++ b/docs/hello/sw.js
@@ -1,12 +1,14 @@
 importScripts('https://cdn.jsdelivr.net/gh/golang/go@go1.23.1/misc/wasm/wasm_exec.js')
-importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.2/sw.js')
+importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v2.0.5/sw.js')
+
+const wasm = 'api.wasm'

 addEventListener('install', (event) => {
-  event.waitUntil(skipWaiting())
+  event.waitUntil(caches.open('examples').then((cache) => cache.add(wasm)))
 })

-addEventListener('activate', event => {
+addEventListener('activate', (event) => {
  event.waitUntil(clients.claim())
 })

-registerWasmHTTPListener('api.wasm', { base: 'api' })
+registerWasmHTTPListener(wasm, { base: 'api' })
--- a/internal/readablestream/writer.go
+++ b/internal/readablestream/writer.go
@@ -12,11 +12,14 @@ type Writer struct {
 	Value      safejs.Value
 	controller safejs.Value
 	ctx        context.Context
+	cancelled  bool
 }

 var _ io.WriteCloser = (*Writer)(nil)

 func NewWriter() (*Writer, error) {
+	var rs *Writer
+
 	var start safejs.Func
 	var controller safejs.Value

@@ -34,6 +37,7 @@ func NewWriter() (*Writer, error) {

 	cancel, err = safejs.FuncOf(func(_ safejs.Value, _ []safejs.Value) any {
 		defer cancel.Release()
+		rs.cancelled = true
 		cancelCtx()
 		return nil
 	})
@@ -54,14 +58,20 @@ func NewWriter() (*Writer, error) {
 		return nil, err
 	}

-	return &Writer{
+	rs = &Writer{
 		Value:      value,
 		controller: controller,
 		ctx:        ctx,
-	}, nil
+	}
+
+	return rs, nil
 }

 func (rs *Writer) Write(b []byte) (int, error) {
+	if rs.cancelled {
+		return 0, nil
+	}
+
 	chunk, err := jstype.Uint8Array.New(len(b)) // FIXME reuse same Uint8Array?
 	if err != nil {
 		return 0, err
@@ -78,8 +88,12 @@ func (rs *Writer) Write(b []byte) (int, error) {
 }

 func (rs *Writer) Close() error {
-	rs.controller.Call("close")
-	return nil
+	if rs.cancelled {
+		return nil
+	}
+
+	_, err := rs.controller.Call("close")
+	return err
 }

 func (rs *Writer) Context() context.Context {
--- a/request.go
+++ b/request.go
@@ -6,6 +6,7 @@ import (
 	"net/http/httptest"
 	"syscall/js"

+	promise "github.com/nlepage/go-js-promise"
 	"github.com/nlepage/go-wasm-http-server/v2/internal/readablestream"
 	"github.com/nlepage/go-wasm-http-server/v2/internal/safejs"
 )
@@ -30,7 +31,26 @@ func Request(uvalue js.Value) (*http.Request, error) {
 	}

 	var bodyReader io.Reader
-	if !body.IsUndefined() && !body.IsNull() {
+
+	if !body.IsNull() {
+		// WORKAROUND: Firefox does not have request.body ReadableStream
+		if body.IsUndefined() {
+			blobp, err := value.Call("blob")
+			if err != nil {
+				return nil, err
+			}
+
+			blob, err := promise.Await(safejs.Unsafe(blobp))
+			if err != nil {
+				return nil, err
+			}
+
+			body, err = safejs.Safe(blob).Call("stream")
+			if err != nil {
+				return nil, err
+			}
+		}
+
 		r, err := body.Call("getReader")
 		if err != nil {
 			return nil, err
--- a/response.go
+++ b/response.go
@@ -136,6 +136,7 @@ func (r *response) Context() context.Context {
 func (r *response) WriteError(str string) {
 	slog.Error(str)
 	if !r.wroteHeader {
+		r.Header().Set("Content-Type", "text/plain")
 		r.WriteHeader(500)
 		_, _ = r.WriteString(str)
 	}
--- a/sw.js
+++ b/sw.js
@@ -1,4 +1,4 @@
-function registerWasmHTTPListener(wasm, { base, args = [] } = {}) {
+function registerWasmHTTPListener(wasm, { base, cacheName, args = [] } = {}) {
  let path = new URL(registration.scope).pathname
  if (base && base !== '') path = `${trimEnd(path, '/')}/${trimStart(base, '/')}`

@@ -11,7 +11,10 @@ function registerWasmHTTPListener(wasm, { base, args = [] } = {}) {

  const go = new Go()
  go.argv = [wasm, ...args]
-  WebAssembly.instantiateStreaming(fetch(wasm), go.importObject).then(({ instance }) => go.run(instance))
+  const source = cacheName
+    ? caches.open(cacheName).then((cache) => cache.match(wasm)).then((response) => response ?? fetch(wasm))
+    : caches.match(wasm).then(response => (response) ?? fetch(wasm))
+  WebAssembly.instantiateStreaming(source, go.importObject).then(({ instance }) => go.run(instance))

  addEventListener('fetch', e => {
    const { pathname } = new URL(e.request.url)
Author	SHA1	Message	Date
Nicolas Lepage	3cf36c41e2	chore: v2.0.5	2024-12-09 23:12:31 +01:00
Nicolas Lepage	30a6ef67f9	fix: avoids closing cancelled readablestream	2024-12-09 23:11:17 +01:00
Nicolas Lepage	669f82020d	chore: rebuilds hello-sse example	2024-12-09 22:46:00 +01:00
Nicolas Lepage	c94dcd965d	chore: v2.0.4	2024-11-27 22:33:50 +01:00
Nicolas Lepage	2d786bdb14	fix: listen for ReadableStream cancellation	2024-11-27 22:32:19 +01:00
Nicolas Lepage	c561826125	chore: v2.0.3	2024-10-17 01:12:34 +02:00
Nicolas Lepage	897626b7d1	fix: Firefox does not have request.body ReadableStream	2024-10-17 01:11:41 +02:00
Nicolas Lepage	c93d379f20	feat: improves examples	2024-10-16 14:01:11 +02:00
Nicolas Lepage	98257b470a	feat: allow using cache for wasm binary	2024-10-16 14:01:11 +02:00
Nicolas Lepage	b2bd8679fd	fix: error management in readablestream writer close method	2024-10-16 13:19:16 +02:00