How to use Nginx Proxy Manager to implement authorization management of cross-domain access

How to use Nginx Proxy Manager to achieve authorization management of cross-domain access

Nginx Proxy Manager is a powerful proxy server that can implement reverse proxy, load balancing, and SSL /TLS terminal proxy and other functions. In practical applications, we often encounter problems with front-end cross-domain access. In order to protect back-end resources, we need to perform authorization management. This article will introduce how to use Nginx Proxy Manager to implement authorization management of cross-domain access, and provide some specific code examples.

1. Install and configure Nginx Proxy Manager
   First, we need to install and configure Nginx Proxy Manager. You can proceed through the following steps:

1.1 Install Nginx Proxy Manager
You can download the installation package of Nginx Proxy Manager through the official website or other channels, and install it according to its official documentation.

1.2 Configure Nginx Proxy Manager
After the installation is completed, we need to configure Nginx Proxy Manager. The configuration file is generally located at /etc/nginx/nginx.conf. You can use a text editor to open the file for configuration.

2. Configuring cross-domain access authorization management
   Next, we will configure cross-domain access authorization management. The specific configuration is as follows:

2.1 Define authorization rules for cross-domain access
In the configuration file of Nginx Proxy Manager, we can use the location directive to define authorization rules for cross-domain access. For example, we can define a rule that allows cross-domain access for a specific domain name in the following way:

location /api {
  add_header 'Access-Control-Allow-Origin' 'http://example.com';
  add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
  add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type';
  add_header 'Access-Control-Allow-Credentials' 'true';
}

In the above example, we added some authorization headers for cross-domain access using the add_header directive field. Among them, the Access-Control-Allow-Origin field specifies the domain name that allows cross-domain access; the Access-Control-Allow-Methods field specifies the allowed HTTP methods; Access The -Control-Allow-Headers field specifies the allowed HTTP header fields; the Access-Control-Allow-Credentials field specifies whether to allow cookies to be carried for cross-domain access.

2.2 Configure error handling for cross-domain access
In order to improve security, when the authorization rules for cross-domain access do not match, we can configure Nginx Proxy Manager to return specific error information. For example, you can configure the returned 403 Forbidden error in the following way:

location /api {
  if ($http_origin != http://example.com) {
    return 403;
  }
}

In the above example, we use the if directive to determine whether the domain name for cross-domain access meets the requirements. If the requirements are not met, a 403 error is returned.

3. Run Nginx Proxy Manager
   After the configuration is completed, we can start Nginx Proxy Manager through the following command:

sudo service nginx start

At this time, Nginx Proxy Manager will start to listen to the configuration port and process it according to the configured cross-domain access authorization rules.

4. Front-end code example
   Finally, we provide a simple front-end code example to demonstrate how to perform cross-domain access. The specific example is as follows:

const url = 'http://api.example.com';
const headers = {
  'Authorization': 'Bearer xxxxxxxx',
  'Content-Type': 'application/json'
};

fetch(url, {
  method: 'GET',
  headers: headers,
  credentials: 'include'
})
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));

In the above example, we use the fetch function to send a GET request for cross-domain access. Among them, the url variable specifies the target URL for cross-domain access; the headers variable specifies the HTTP header field of the request; the credentials parameter specifies whether to carry cookies for cross-domain access. domain access.

Summary:
This article introduces how to use Nginx Proxy Manager to implement authorization management of cross-domain access, and provides some specific code examples. By configuring the cross-domain access rules of Nginx Proxy Manager, we can flexibly control access to back-end resources to protect the security of the system. I hope this article can be helpful to readers.

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