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Release js.FuncOf callbacks in wasm ssh and rdp to prevent leaks

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This commit is contained in:
Viktor Liu
2026-04-24 11:28:55 +02:00
parent f732b01a05
commit b786534b68
3 changed files with 121 additions and 42 deletions
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27
client/wasm/internal/ssh/handlers.go
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@@ -13,7 +13,7 @@ import (
func CreateJSInterface(client *Client) js.Value {
jsInterface := js.Global().Get("Object").Call("create", js.Null())
jsInterface.Set("write", js.FuncOf(func(this js.Value, args []js.Value) any {
writeFunc := js.FuncOf(func(this js.Value, args []js.Value) any {
if len(args) < 1 {
return js.ValueOf(false)
}
@@ -32,9 +32,10 @@ func CreateJSInterface(client *Client) js.Value {
_, err := client.Write(bytes)
return js.ValueOf(err == nil)
}))
})
jsInterface.Set("write", writeFunc)
jsInterface.Set("resize", js.FuncOf(func(this js.Value, args []js.Value) any {
resizeFunc := js.FuncOf(func(this js.Value, args []js.Value) any {
if len(args) < 2 {
return js.ValueOf(false)
}
@@ -42,14 +43,26 @@ func CreateJSInterface(client *Client) js.Value {
rows := args[1].Int()
err := client.Resize(cols, rows)
return js.ValueOf(err == nil)
}))
})
jsInterface.Set("resize", resizeFunc)
jsInterface.Set("close", js.FuncOf(func(this js.Value, args []js.Value) any {
closeFunc := js.FuncOf(func(this js.Value, args []js.Value) any {
client.Close()
return js.Undefined()
}))
})
jsInterface.Set("close", closeFunc)
go readLoop(client, jsInterface)
go func() {
readLoop(client, jsInterface)
// Detach before releasing so late JS calls surface as TypeError instead
// of silent "call to released function".
jsInterface.Set("write", js.Undefined())
jsInterface.Set("resize", js.Undefined())
jsInterface.Set("close", js.Undefined())
writeFunc.Release()
resizeFunc.Release()
closeFunc.Release()
}()
return jsInterface
}