如何停止 Fastly HTTPS 308 永久重定向？

Question

我有一个 Fastly Compute@Edge 服务，该服务配置为对前端域和后端主机使用 HTTP，但是当我连接时，我得到一个 308 https 重定向，我想停止它。我希望它只是运行和 return 似乎没有执行的 Edge 函数代码。

我的域是 www.goodapis.com，CNAME 配置为指向 nonssl.global.fastly.net.，如下所示：

% dig www.goodapis.com +short
nonssl.global.fastly.net.
151.101.188.204

我的后端主机指向 example.com:80（也没有 TLS），不过现在这应该无关紧要，因为加载的边缘代码不会调用后端主机。

我的 Edge 代码包是来自以下 repo 的演示代码：

https://github.com/fastly/compute-starter-kit-javascript-default

使用以下代码（此处删除了一些注释）：

https://github.com/fastly/compute-starter-kit-javascript-default/blob/main/src/index.js

//! Default Compute@Edge template program.

/// <reference types="@fastly/js-compute" />
import welcomePage from "./welcome-to-compute@edge.html";

// The entry point for your application.
//
// Use this fetch event listener to define your main request handling logic. It could be
// used to route based on the request properties (such as method or path), send
// the request to a backend, make completely new requests, and/or generate
// synthetic responses.

addEventListener("fetch", (event) => event.respondWith(handleRequest(event)));

async function handleRequest(event) {
  // Get the client request.
  let req = event.request;

  // Filter requests that have unexpected methods.
  if (!["HEAD", "GET"].includes(req.method)) {
    return new Response("This method is not allowed", {
      status: 405,
    });
  }

  let url = new URL(req.url);

  // If request is to the `/` path...
  if (url.pathname == "/") {
    // <cut comments>
    // Send a default synthetic response.
    return new Response(welcomePage, {
      status: 200,
      headers: new Headers({ "Content-Type": "text/html; charset=utf-8" }),
    });
  }

  // Catch all other requests and return a 404.
  return new Response("The page you requested could not be found", {
    status: 404,
  });
}

然而，当我调用http://www.goodapis.com, I get a 308 Permanent Redirect to https://www.goodapis.com。当我发送 POST 以及清除整个缓存后，就会发生这种情况。

% curl http://www.goodapis.com --verbose
*   Trying 151.101.40.204:80...
* Connected to www.goodapis.com (151.101.40.204) port 80 (#0)
> GET / HTTP/1.1
> Host: www.goodapis.com
> User-Agent: curl/7.77.0
> Accept: */*
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 308 Permanent Redirect
< Server: Varnish
< Retry-After: 0
< Content-Length: 0
< Location: https://www.goodapis.com/
< Accept-Ranges: bytes
< Date: Mon, 23 May 2022 21:08:25 GMT
< Via: 1.1 varnish
< Connection: close
< X-Served-By: cache-sjc10043-SJC
< X-Cache: HIT
< X-Cache-Hits: 0
< 
* Closing connection 0

任何人都知道为什么会发生此 308 重定向以及如何停止它？

Answer 1

Fastly 的 Compute@Edge 平台不支持 HTTP 连接。所以这些请求会被自动重定向。

此处的 Fastly 文档对此进行了描述： https://developer.fastly.com/learning/compute/#limitations-and-constraints

Compute@Edge services allow connections to backends on ports 80 and 443, and accept client connections on port 443 only.

如果您还有任何问题，请随时联系支持@fastly.com

谢谢。

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