请选择
Edge Developer Platform
  • Edge Functions
    • Overview
    • Getting Started
    • Operation Guide
      • Function Management
      • Function Trigger
    • Runtime APIs
      • addEventListener
      • Cache
      • Cookies
      • Encoding
      • Fetch
      • FetchEvent
      • Headers
      • Request
      • Response
      • Streams
        • ReadableStream
        • ReadableStreamBYOBReader
        • ReadableStreamDefaultReader
        • TransformStream
        • WritableStream
        • WritableStreamDefaultWriter
      • Web Crypto
      • Web standards
      • Images
        • ImageProperties
    • Sample Functions
      • Returning an HTML Page
      • Returning a JSON Object
      • Fetch Remote Resources
      • Authenticating a Request Header
      • Modifying a Response Header
      • Performing an A/B Test
      • Setting Cookies
      • Performing Redirect Based on the Request Location
      • Using the Cache API
      • Caching POST Requests
      • Responding in Streaming Mode
      • Merging Resources and Responding in Streaming Mode
      • Protecting Data from Tampering
      • Rewriting a m3u8 File and Configuring Authentication
      • Adaptive Image Resize
      • Image Adaptive WebP
      • Customize Referer restriction rules
      • Remote Authentication
      • HMAC Digital Signature
      • Naming a Downloaded File
      • Obtaining Client IP Address
    • Best Practices
      • Adaptive Image Format Conversion via Edge Functions

Performing Redirect Based on the Request Location

This example implements automatic redirection to the Target url of the region belonging to the Client by judging the region of the Client. It realizes the delivery of requests based on the region of the Client through Edge functions.

Sample Code

// The collection of URLs in all regions.
const urls = {
CN: 'https://www.example.com/zh-CN',
US: 'https://www.example.com/en-US',
};

// The default redirect URL.
const defaultUrl = 'https://www.example.com/en-US';

/**
* Redirect to the target URL based on the region of the current request.
* @param { Request } request
*/
function handleRequest(request) {
// Obtain the region of the current request.
const alpha2code = request.eo.geo.countryCodeAlpha2;
// The target URL that you want to use for redirection.
const url = urls[alpha2code] || defaultUrl;

return Response.redirect(url, 302);
}

addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request));
});

Sample Preview

In the address bar of the browser, enter a URL that matches a trigger rule of the edge function to preview the effect of the sample code.




References