Added fallback option when instantiateStreaming is not available

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.2.8
+
+- Added fallback option when instantiateStreaming is not available
+
 ## 3.2.7
 
 - Updated binaries to 1.3.4

example/pubspec.lock

@@ -254,7 +254,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "3.2.7"
+    version: "3.2.8"
   package_config:
     dependency: transitive
     description:

lib/web/assets/worker.js

@@ -1,11 +1,18 @@
 self.importScripts("wasm_exec.js");
 
 self.loaded = false;
+self.library = "openpgp.wasm";
+
 load = () => {
+
+  if (!WebAssembly.hasOwnProperty('instantiateStreaming')){
+    return loadFallback();
+  }
+
   const go = new Go();
   let mod, inst;
   return WebAssembly.instantiateStreaming(
-    fetch("openpgp.wasm"),
+    fetch(self.library),
     go.importObject
   ).then(async (result) => {
     mod = result.module;
@@ -25,6 +32,31 @@ load = () => {
   });
 };
 
+loadFallback = () => {
+  const go = new Go();
+  let mod, inst;
+  return fetch(self.library).then(response =>
+    response.arrayBuffer()
+  ).then(bytes =>
+    WebAssembly.instantiate(bytes, go.importObject)
+  ).then(async (result) => {
+    mod = result.module;
+    inst = result.instance;
+    const run = async () => {
+      try {
+        self.loaded = true;
+        await go.run(inst);
+        self.loaded = false;
+      } catch (e) {
+        console.warn(e);
+        self.loaded = false;
+        loadFallback();
+      }
+    };
+    run();
+  });
+};
+
 onmessage = async ({ data }) => {
   if (!self.loaded) {
     await load();

pubspec.yaml

@@ -1,6 +1,6 @@
 name: openpgp
 description: library for use OpenPGP with support for android and ios, macOS, linux, windows, web and hover
-version: 3.2.7
+version: 3.2.8
 homepage: https://github.com/jerson/flutter-openpgp
 
 environment: