创建一个 Web.config文件放到index.html一起就好了

配置文件内容如下

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <staticContent>
      <remove fileExtension=".mem" />
      <remove fileExtension=".data" />
      <remove fileExtension=".unity3d" />
      <remove fileExtension=".jsbr" />
      <remove fileExtension=".membr" />
      <remove fileExtension=".databr" />
      <remove fileExtension=".unity3dbr" />
      <remove fileExtension=".jsgz" />
      <remove fileExtension=".memgz" />
      <remove fileExtension=".datagz" />
      <remove fileExtension=".unity3dgz" />
      <remove fileExtension=".json" />
      <remove fileExtension=".unityweb" />
 
      <mimeMap fileExtension=".mem" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".data" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".unity3d" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".jsbr" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".membr" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".databr" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".unity3dbr" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".jsgz" mimeType="application/x-javascript; charset=UTF-8" />
      <mimeMap fileExtension=".memgz" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".datagz" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".unity3dgz" mimeType="application/octet-stream" />
      <mimeMap fileExtension=".json" mimeType="application/json; charset=UTF-8" />
      <mimeMap fileExtension=".unityweb" mimeType="application/octet-stream" />
    </staticContent>
  </system.webServer>
</configuration>