How To Solve ‘redirect Has Been Blocked By CORS Policy: No ‘access-control-allow-origin’ Header’?

To solve the "Redirect has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header" issue in JavaScript, you need to either update the server-side code or use a proxy server. Here are two possible solutions:

  1. Server-Side Solution:

    • Add the following HTTP header in the server’s response:
      Access-Control-Allow-Origin: *
      

      This allows any domain to access the resource. If you want to restrict it to specific domains, replace the * with the appropriate domain(s).

  2. Proxy Server Solution:

    • Set up a proxy server that acts as an intermediary between your client-side code and the target server.
    • Your JavaScript code will make requests to the proxy server, which will forward the request to the desired server and then return the response back to your code.
    • Since the request is made from your own domain to your own domain (the proxy server), there are no CORS restrictions.
    • Popular proxy server options include http-proxy-middleware for Express or http-proxy for Node.js.

It’s important to note that the second solution requires additional setup and maintenance of a proxy server. The server-side solution is recommended if you have control over the server-side code and can modify the necessary headers.

About the Author Rex

I'm a passionate tech blogger with an insatiable love for programming! From my early days tinkering with code, I've delved into web dev, mobile apps, and AI. Sharing insights and tutorials with the world is my joy, connecting me to a global community of like-minded tech enthusiasts. Python holds a special place in my heart, but I embrace all challenges. Constantly learning, I attend tech conferences, contribute to open-source projects, and engage in code review sessions. My ultimate goal is to inspire the next generation of developers and contribute positively to the ever-evolving tech landscape. Let's code together!