feature: support remote file paths

src/parts/GetResponse/GetResponse.ts

@@ -2,9 +2,10 @@ import { fileURLToPath } from 'node:url'
 import * as HandleIndexHtml from '../HandleIndexHtml/HandleIndexHtml.ts'
 import * as HandleOther from '../HandleOther/HandleOther.ts'
 import * as HandlePreviewInjected from '../HandlePreviewInjected/HandlePreviewInjected.ts'
+import * as ResolveFilePath from '../ResolveFilePath/ResolveFilePath.ts'
 
 export const getResponse = async (pathName: string, frameAncestors: string, webViewRoot: string): Promise<Response> => {
-  const filePath = fileURLToPath(`file://${webViewRoot}${pathName}`)
+  const filePath = ResolveFilePath.resolveFilePath(pathName, webViewRoot)
   const isHtml = filePath.endsWith('index.html')
   if (isHtml) {
     return HandleIndexHtml.handleIndexHtml(filePath, frameAncestors)

src/parts/ResolveFilePath/ResolveFilePath.ts

@@ -0,0 +1,16 @@
+import { fileURLToPath } from 'node:url'
+
+export const resolveFilePath = (pathName: string, webViewRoot: string) => {
+  // TODO remove this, double slash should not be allowed
+  // TODO use path.resolve and verify that file path is in allowed roots
+  if (pathName.startsWith('/remote//')) {
+    const filePath = pathName.slice('/remote/'.length)
+    return fileURLToPath(`file://${filePath}`)
+  }
+  if (pathName.startsWith('/remote/')) {
+    const filePath = pathName.slice('/remote'.length)
+    return fileURLToPath(`file://${filePath}`)
+  }
+  const filePath = fileURLToPath(`file://${webViewRoot}${pathName}`)
+  return filePath
+}