One post tagged with "Sakura Rental Server"

Background​

Sakura’s rental server "Lite Plan" offers an incredibly low price of 121 yen per month for a 36-month lump sum payment (165 yen per month for a 12-month lump sum). It's sufficient for hosting static files and CGI purposes, making it easy to use as personal storage.

However, the assigned domain will be a subdomain of username.sakura.ne.jp, so some ingenuity is required if you want to associate your custom domain with a specific path.

What I Want to Achieve​

When accessing https://app.example.com, the content from https://sakurauser.sakura.ne.jp/app/ should be displayed without changing the URL.

Why Simple DNS Settings Won't Work​

DNS CNAME records can only specify hostnames, and URLs that include paths like /app/ cannot be specified.

While it can be achieved using a redirect (301), the URL in the browser's address bar would change to sakurauser.sakura.ne.jp/flower/.

Using transparent proxy with Cloudflare Workers allows the URL to remain as app.example.com.

Prerequisites​

• You must be registered with a custom domain on Cloudflare (e.g., example.com)
• A free plan on Cloudflare is acceptable (up to 100,000 requests per day for free)

Steps​

1. Create a Worker​

1. Cloudflare Dashboard → Workers & Pages → Create
2. Select Start with Hello World!
3. Enter the Worker name (e.g., storage-proxy)
4. Click Deploy

2. Edit the Code​

After deploying, click Edit code and replace all with the following code.

export default {
  async fetch(request) {
    const url = new URL(request.url);
    const target = new URL("https://sakurauser.sakura.ne.jp");
    target.pathname = "/app" + url.pathname;
    target.search = url.search;

    const newRequest = new Request(target.toString(), {
      method: request.method,
      headers: request.headers,
      body: request.body,
    });

    const response = await fetch(newRequest);

    const newHeaders = new Headers(response.headers);
    newHeaders.delete("content-security-policy");
    newHeaders.delete("x-frame-options");

    return new Response(response.body, {
      status: response.status,
      headers: newHeaders,
    });
  }
};

Summary​

• Sakura's rental server Lite Plan is 121 yen per month and can sufficiently serve as a storage for static files.
• However, assigning a custom domain to a subpath is not possible with standard DNS settings.
• By using Cloudflare Workers as a transparent proxy, you can deliver content without changing the URL.
• The Workers' code is only a few dozen lines, and it operates within the limits of the Cloudflare free plan.