Squash merge develop into master

internal/vfs/wasm/serve.go

@@ -0,0 +1,59 @@
+//go:build js && wasm
+
+package wasm
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+	"syscall/js"
+
+	promise "github.com/nlepage/go-js-promise"
+)
+
+// Serve serves HTTP requests using handler or http.DefaultServeMux if handler is nil.
+func Serve(handler http.Handler) func() {
+	h := handler
+	if h == nil {
+		h = http.DefaultServeMux
+	}
+
+	prefix := js.Global().Get("wasmhttp").Get("path").String()
+	for strings.HasSuffix(prefix, "/") {
+		prefix = strings.TrimSuffix(prefix, "/")
+	}
+
+	if prefix != "" {
+		mux := http.NewServeMux()
+		mux.Handle(prefix+"/", http.StripPrefix(prefix, h))
+		h = mux
+	}
+
+	cb := js.FuncOf(func(_ js.Value, args []js.Value) interface{} {
+		resPromise, resolve, reject := promise.New()
+
+		go func() {
+			defer func() {
+				if r := recover(); r != nil {
+					if err, ok := r.(error); ok {
+						reject(fmt.Sprintf("wasmhttp: panic: %+v\n", err))
+					} else {
+						reject(fmt.Sprintf("wasmhttp: panic: %v\n", r))
+					}
+				}
+			}()
+
+			res := NewResponseRecorder()
+
+			h.ServeHTTP(res, Request(args[0]))
+
+			resolve(res.JSResponse())
+		}()
+
+		return resPromise
+	})
+
+	js.Global().Get("wasmhttp").Call("setHandler", cb)
+
+	return cb.Release
+}