QuynhVir/corsproxyservice.js

## corsproxyservice.js
export default {
  async fetch(request) {
    function usageResponse() {
      const usageHtml = `<!DOCTYPE html>
		  <html>
		  <head><title>CORS Proxy Service</title></head>
		  <body>
			<h1>CORS Proxy Usage</h1>
			<p>Use this proxy by appending the URL you want to access to the base URL of this proxy. For example:</p>
			<code>https://our-corsproxy.site/https://somewhere.hates.cors/some-path?somequery=param</code>
		  </body>
		  </html>`;
      return new Response(usageHtml, {
        headers: {
          "content-type": "text/html;charset=UTF-8",
        },
      });
    }

    const url = new URL(request.url);
    const pathname = url.pathname;
    const origin = request.headers.get("Origin");

    if (request.method === 'OPTIONS') {
      return new Response(null, {
        headers: {
          "Access-Control-Allow-Origin": origin ? origin : "*",
          "Access-Control-Allow-Methods": "GET, HEAD, POST, OPTIONS",
          "Access-Control-Allow-Headers": "Content-Type, x-functions-key, Authorization",
          "Access-Control-Max-Age": "86400",
        }
      });
    }

    if (pathname === '/') {
      return usageResponse();
    }

    const apiUrl = pathname.substring(1);

    try {
      const proxyRequest = new Request(apiUrl, request);
      proxyRequest.headers.set("Origin", new URL(apiUrl).origin);
      let response = await fetch(proxyRequest);

      response = new Response(response.body, response);

      response.headers.set("Access-Control-Allow-Origin", origin ? origin : "*");
      response.headers.set("Access-Control-Allow-Headers", "Content-Type, x-functions-key, Authorization");
      response.headers.set("Access-Control-Allow-Methods", "GET, HEAD, POST, OPTIONS");

      return response;
    } catch (e) {
      return new Response(`Fetch Error: ${e.message}`, {
        status: 500
      });
    }
  }
};
	export default {
	async fetch(request) {
	function usageResponse() {
	const usageHtml = `<!DOCTYPE html>
	<html>
	<head><title>CORS Proxy Service</title></head>
	<body>
	<h1>CORS Proxy Usage</h1>
	<p>Use this proxy by appending the URL you want to access to the base URL of this proxy. For example:</p>
	<code>https://our-corsproxy.site/https://somewhere.hates.cors/some-path?somequery=param</code>
	</body>
	</html>`;
	return new Response(usageHtml, {
	headers: {
	"content-type": "text/html;charset=UTF-8",
	},
	});
	}

	const url = new URL(request.url);
	const pathname = url.pathname;
	const origin = request.headers.get("Origin");

	if (request.method === 'OPTIONS') {
	return new Response(null, {
	headers: {
	"Access-Control-Allow-Origin": origin ? origin : "*",
	"Access-Control-Allow-Methods": "GET, HEAD, POST, OPTIONS",
	"Access-Control-Allow-Headers": "Content-Type, x-functions-key, Authorization",
	"Access-Control-Max-Age": "86400",
	}
	});
	}

	if (pathname === '/') {
	return usageResponse();
	}

	const apiUrl = pathname.substring(1);

	try {
	const proxyRequest = new Request(apiUrl, request);
	proxyRequest.headers.set("Origin", new URL(apiUrl).origin);
	let response = await fetch(proxyRequest);

	response = new Response(response.body, response);

	response.headers.set("Access-Control-Allow-Origin", origin ? origin : "*");
	response.headers.set("Access-Control-Allow-Headers", "Content-Type, x-functions-key, Authorization");
	response.headers.set("Access-Control-Allow-Methods", "GET, HEAD, POST, OPTIONS");

	return response;
	} catch (e) {
	return new Response(`Fetch Error: ${e.message}`, {
	status: 500
	});
	}
	}
	};