Replace http-server with custom node server since http-server does no…

…t server wasm mime-type for Firefox

package.json

@@ -5,11 +5,9 @@
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start": "http-server public_html -c-1 -p 3000"
+    "start": "node static_server.js 3000 public_html"
   },
   "author": "Allen Garvey",
   "license": "MIT",
-  "devDependencies": {
-    "http-server": "^0.11.1"
-  }
+  "devDependencies": {}
 }

static_server.js

@@ -0,0 +1,70 @@
+/**
+ * Based on: https://gist.github.com/aolde/8104861
+ * which is a fork of: https://gist.github.com/ryanflorence/701407
+ * Can't use vanilla http-server, since it doesn't use wasm mime-type, which is required for this to work in FireFox
+ */
+
+function error404(response){
+    response.writeHead(404, { "Content-Type": "text/plain" });
+    response.write("404 Not Found\n");
+    response.end();
+}
+
+var http = require("http"),
+    url = require("url"),
+    path = require("path"),
+    fs = require("fs")
+    port = process.argv[2] || 3000,
+    mimeTypes = {
+      "html": "text/html",
+      "jpeg": "image/jpeg",
+      "jpg": "image/jpeg",
+      "png": "image/png",
+      "js": "text/javascript",
+      "css": "text/css",
+      "wasm": "application/wasm",
+    };
+var publicRoot = process.cwd();
+if(process.argv[3]){
+    publicRoot = path.join(publicRoot, process.argv[3]);
+}
+
+http.createServer(function(request, response) {
+
+  var uri = url.parse(request.url).pathname;
+  var filename = path.join(publicRoot, uri);
+  //to prevent directory traversal using ../
+  if(!filename.startsWith(publicRoot)){
+    return error404(response);
+  }
+
+  fs.exists(filename, function(exists) {
+    if(!exists) {
+      return error404(response);
+    }
+
+    if (fs.statSync(filename).isDirectory()) 
+      filename += '/index.html';
+
+    fs.readFile(filename, "binary", function(err, file) {
+      if(err) {        
+        response.writeHead(500, {"Content-Type": "text/plain"});
+        response.write(err + "\n");
+        response.end();
+        return;
+      }
+
+      var mimeType = mimeTypes[filename.split('.').pop()];
+
+      if (!mimeType) {
+        mimeType = 'text/plain';
+      }
+
+      response.writeHead(200, { "Content-Type": mimeType });
+      response.write(file, "binary");
+      response.end();
+    });
+  });
+}).listen(parseInt(port, 10));
+
+console.log(`Static file server serving files from ${publicRoot} running at http://localhost:${port}/\nCTRL + C to shutdown`);