Virtualmin’s Remote API doesn’t have native CORS support since it’s primarily meant for server-to-server communication, which doesn’t typically involve cross-origin requests from browsers. However, you can implement a workaround to enable CORS in a few ways.
Solutions to Enable CORS for Virtualmin Remote API
- Use a Proxy Server: Create a proxy server (e.g., with Express.js or Nginx) to act as an intermediary between your Angular app and Virtualmin. This avoids the CORS issue by routing requests through a server on the same origin. Here’s a basic example with Express.js:
const express = require("express");
const request = require("request");
const app = express();
app.use((req, res, next) => {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization");
next();
});
app.get("/api", (req, res) => {
request(
{ url: "https://example.com:10000/virtual-server/remote.cgi?json=1&program=list-domains" },
(error, response, body) => {
if (error) return res.status(500).send(error);
res.send(body);
}
);
});
app.listen(3000, () => {
console.log("Proxy server running on port 3000");
});
Now you can point your Angular app to http://localhost:3000/api
.
2. Set Up Nginx as a Reverse Proxy: If you have control over Nginx, set it up to serve as a reverse proxy and add CORS headers to the response. Here’s a configuration example:
location /api/ {
proxy_pass https://example.com:10000/;
proxy_set_header Host $host;
add_header Access-Control-Allow-Origin "*";
add_header Access-Control-Allow-Methods "GET, POST, OPTIONS";
add_header Access-Control-Allow-Headers "Authorization, Content-Type";
}
You would need to direct your Angular app’s requests to https://yourdomain.com/api/virtual-server/remote.cgi
.
3. Use JSONP (Less Preferred): JSONP can work for GET
requests, but since it’s an older approach and doesn’t support POST
, it’s generally not recommended for RESTful APIs.
4. Modify Your Angular Requests: Make sure to set up Angular’s HttpClient
with appropriate headers, but be aware that even with the headers, a CORS policy on the server is necessary. Using a proxy is typically the most reliable solution.
By using a proxy server or Nginx configuration, you can bypass the CORS restrictions and ensure your Angular app can communicate seamlessly with the Virtualmin Remote API.