React-pdf cors

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When using the react-pdf library, you may encounter a “CORS error” if you are trying to load a PDF document from a different origin. This error occurs because browsers enforce a security mechanism called “same-origin policy” to prevent web pages from making requests to a different domain.

To solve this issue, you need to enable CORS (Cross-Origin Resource Sharing) on the server hosting your PDF document. CORS allows the server to specify who can access its resources, bypassing the same-origin policy.

Here is an example of how to enable CORS in popular server-side frameworks:

  • Express.js (Node.js)
    Install the cors package using npm install cors command. Then, in your server code, add the following middleware to enable CORS:

            
const express = require('express');
const cors = require('cors');

const app = express();

app.use(cors());

// Your other server code...

app.listen(3000, () => {
  console.log('Server listening on port 3000');
});
  • ASP.NET (C#)
    In your server code, you can enable CORS by adding the following lines before your API routes:

            
public static void Register(HttpConfiguration config)
{
    // Enable CORS
    config.EnableCors();
    
    // Your other API route configurations...
}
  • PHP
    If you are using Apache as your web server, you can enable CORS by adding the following lines to your .htaccess file:

            
Header set Access-Control-Allow-Origin "*"
Header set Access-Control-Allow-Methods "GET, POST, OPTIONS, PUT, DELETE"
Header set Access-Control-Allow-Headers "Content-Type"

After enabling CORS on your server, the “CORS error” should no longer occur, and you will be able to use the react-pdf library to load and display your PDF documents without any issues.

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