Woocommerce REST API not working

Troubleshooting WooCommerce REST API Issues

WooCommerce, the popular e-commerce plugin for WordPress, offers a powerful REST API that allows developers to interact with store data remotely. However, like any software, users may occasionally encounter issues with the WooCommerce REST API not working. This article explores common causes of these issues and provides solutions to help you get your API back up and running.

Understanding the WooCommerce REST API

The WooCommerce REST API enables developers to access and manipulate store data programmatically. This includes operations such as retrieving product information, managing orders, and updating customer details. The API uses standard HTTP methods (GET, POST, PUT, DELETE) and supports JSON format for data exchange.

Common Issues and Solutions

1. Authentication Problems

Symptoms:

Receiving 401 Unauthorized errors.
Authentication tokens or keys not recognized.

Causes:

Incorrect API keys or secrets.
Misconfigured authentication headers.
Expired API keys.

Solutions:

Double-check that you are using the correct Consumer Key and Consumer Secret.
Ensure your authentication headers are correctly formatted. For OAuth 1.0a, headers should include Authorization: OAuth ....
If using basic authentication, headers should include Authorization: Basic ....
Verify that the API keys have not expired or been revoked. Generate new keys if necessary.

2. Endpoint Issues

Symptoms:

404 Not Found errors.
Inability to access certain API endpoints.

Causes:

Incorrect endpoint URLs.
Permalink settings not configured correctly.
API version mismatch.

Solutions:

Confirm the endpoint URLs are correct. For example, https://yourdomain.com/wp-json/wc/v3/products.
Ensure your WordPress permalink settings are set to "Post name" or any custom structure that does not conflict with REST routes.
Check that you are using the correct API version in your endpoint paths (e.g., /wc/v3/ for WooCommerce 3.x).

3. CORS (Cross-Origin Resource Sharing) Issues

Symptoms:

403 Forbidden errors.
Requests blocked by the browser.

Causes:

CORS policy blocking requests from different origins.

Solutions:

Modify the server configuration to allow CORS. For Apache, add the following to your .htaccess file:

apache
<IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
</IfModule>

For Nginx, add the following to your server block:

nginx
add_header 'Access-Control-Allow-Origin' '*';

4. SSL/TLS Issues

Symptoms:

SSL certificate problem: unable to get local issuer certificate errors.

Causes:

Misconfigured SSL certificates.
Outdated CA bundle on the server.

Solutions:

Ensure your SSL certificates are correctly installed and configured.
Update the CA certificates on your server. On Linux, you can update the CA bundle using:
```
bash
sudo apt-get update
sudo apt-get install --reinstall ca-certificates
```

5. Plugin or Theme Conflicts

Symptoms:

Unexpected API responses.
Errors only occurring after recent plugin or theme changes.

Causes:

Conflicts with other WordPress plugins or themes.
Code issues within custom plugins or themes.

Solutions:

Deactivate all plugins except WooCommerce and test the API. Reactivate plugins one by one to identify the culprit.
Switch to a default WordPress theme (e.g., Twenty Twenty-One) and test the API.
Review and debug custom plugin or theme code for compatibility issues with WooCommerce.

6. Rate Limiting and Throttling

Symptoms:

429 Too Many Requests errors.

Causes:

Exceeding the API rate limits.

Solutions:

Implement request throttling in your application to avoid exceeding rate limits.
Consult the WooCommerce API documentation for rate limit details and adjust your usage accordingly.

7. Server-Side Configuration

Symptoms:

General API connectivity issues.
Timeouts and slow responses.

Causes:

Insufficient server resources.
Firewall or security plugin restrictions.

Solutions:

Ensure your server meets WooCommerce’s minimum requirements for PHP, MySQL, and WordPress.
Check your server's resource usage and upgrade if necessary.
Review and adjust firewall or security plugin settings to allow API traffic.

Troubleshooting WooCommerce REST API issues can be challenging, but by systematically addressing common causes, you can often resolve these problems quickly. Start by verifying your authentication setup, checking endpoint configurations, and ensuring proper server settings. If issues persist, consider seeking help from WooCommerce support or a developer with experience in WordPress and WooCommerce.

By understanding and addressing these common issues, you can ensure that your WooCommerce REST API functions smoothly, allowing you to leverage its full capabilities for your e-commerce operations.

Authentication Problems

Authentication is a crucial part of the WooCommerce REST API as it ensures that only authorized users can access or modify the store's data. Here’s a detailed breakdown of common authentication problems and their solutions:

Types of Authentication

WooCommerce REST API supports two main types of authentication:

Basic Authentication: Using the Consumer Key and Consumer Secret as username and password respectively.
OAuth 1.0a Authentication: A more secure method that involves signing requests with the Consumer Key, Consumer Secret, and a signature.

Common Authentication Problems

1. Incorrect API Keys

Symptoms:

Receiving 401 Unauthorized errors.
Unable to authenticate requests.

Causes:

Using incorrect or outdated API keys.
Misconfigured API keys in your application.

Solutions:

Verify that you are using the correct Consumer Key and Consumer Secret.
Check the status of your API keys in the WooCommerce admin panel (WooCommerce > Settings > Advanced > REST API). Ensure they are active and have the appropriate permissions.

2. Misconfigured Authentication Headers

Symptoms:

Authentication errors when making API requests.
Requests not being recognized as authenticated.

Causes:

Incorrect formatting of the authentication headers.
Missing headers in the API requests.

Solutions:

For Basic Authentication, ensure your headers are correctly formatted. Example:
```
http
Authorization: Basic base64_encode(consumer_key:consumer_secret)
```
Replace base64_encode(consumer_key:consumer_secret) with the base64 encoded string of your Consumer Key and Consumer Secret.
For OAuth 1.0a Authentication, ensure you include all necessary OAuth parameters (oauth_consumer_key, oauth_signature, etc.) in the request.

3. Incorrect Permissions

Symptoms:

Access denied errors.
Inability to perform certain actions despite valid authentication.

Causes:

API keys not having the correct permissions.
Roles and capabilities not aligned with the API requirements.

Solutions:

Check the permissions assigned to your API keys in the WooCommerce admin panel. Ensure they match the required actions (read, write, or read/write).
Review user roles and capabilities in WordPress to ensure they align with the API access needs.

4. Expired or Revoked API Keys

Symptoms:

Sudden loss of access after a period of successful requests.
401 Unauthorized errors with previously working keys.

Causes:

API keys have expired.
Keys have been manually revoked in the WooCommerce settings.

Solutions:

Check the status of your API keys in the WooCommerce admin panel. Revoke and regenerate keys if necessary.
Implement a key rotation strategy to minimize disruptions caused by key expiration.

5. Incorrect Endpoint or URL Structure

Symptoms:

Authentication errors when accessing specific endpoints.
404 Not Found or 401 Unauthorized errors due to endpoint issues.

Causes:

Incorrect URL structure or versioning.
Typographical errors in the endpoint URL.

Solutions:

Verify that you are using the correct endpoint URL. For example:
```
http
https://yourdomain.com/wp-json/wc/v3/products
```
Ensure you are using the correct API version in your URL paths.

Example Requests

Basic Authentication Example

Using cURL:

bash
curl -X GET https://yourdomain.com/wp-json/wc/v3/products \
     -u consumer_key:consumer_secret

Using Python:

python
import requests
from requests.auth import HTTPBasicAuth

response = requests.get('https://yourdomain.com/wp-json/wc/v3/products', 
                        auth=HTTPBasicAuth('consumer_key', 'consumer_secret'))
print(response.json())

OAuth 1.0a Authentication Example

Using cURL:

bash
curl -X GET https://yourdomain.com/wp-json/wc/v3/products \
     --header 'Authorization: OAuth oauth_consumer_key="consumer_key", oauth_nonce="generated_nonce", oauth_signature="generated_signature", oauth_signature_method="HMAC-SHA256", oauth_timestamp="current_timestamp", oauth_version="1.0"'

Tools and Resources

Postman: A popular tool for testing API requests. It supports both Basic and OAuth authentication methods.
WooCommerce API Documentation: Official documentation for detailed instructions and examples.
JWT Authentication: For an alternative approach, you can use JSON Web Tokens (JWT) for API authentication by installing appropriate plugins and configuring them.

By addressing these common authentication issues, you can ensure that your WooCommerce REST API requests are authenticated correctly, enabling secure and efficient interaction with your store’s data.

Endpoint Issues

Endpoint issues are another common problem when working with the WooCommerce REST API. These issues typically arise from incorrect URL configurations, improper API versioning, or permalink settings in WordPress. Here’s a detailed breakdown of common endpoint issues and their solutions:

Common Endpoint Issues

1. Incorrect Endpoint URLs

Symptoms:

Receiving 404 Not Found errors.
Inability to access certain API endpoints.

Causes:

Typographical errors in the URL.
Incorrect API version specified.
Missing or incorrect base URL.

Solutions:

Verify the endpoint URL structure. A typical WooCommerce REST API endpoint URL looks like this:
```
http
https://yourdomain.com/wp-json/wc/v3/products
```
Ensure there are no typos and that the domain, /wp-json/, and /wc/v3/ parts are correct.
Ensure you are using the correct API version. For example, /wc/v3/ is used for WooCommerce version 3.x. Older versions may use /wc/v2/ or /wc/v1/.

2. Permalink Settings

Symptoms:

404 Not Found errors despite correct URL structure.
API endpoints not resolving properly.

Causes:

WordPress permalinks not configured correctly.
Conflicts with other WordPress plugins or themes affecting the permalinks.

Solutions:

Go to your WordPress admin panel, navigate to Settings > Permalinks, and ensure the permalink structure is set to "Post name" or a custom structure that does not conflict with REST API routes.
Save the permalink settings again, even if no changes are made, to refresh the permalink structure.

3. API Version Mismatch

Symptoms:

404 Not Found or 400 Bad Request errors.
Endpoints not working after a WooCommerce update.

Causes:

Using an outdated API version.
WooCommerce update requiring changes in the API version used.

Solutions:

Check the WooCommerce version you are using and ensure your API requests match the appropriate version. For instance, WooCommerce 4.x and 5.x use /wc/v3/:
```
http
https://yourdomain.com/wp-json/wc/v3/products
```
Refer to the WooCommerce REST API documentation for the correct endpoints and versions.

4. SSL/TLS Configuration

Symptoms:

Inability to access API endpoints over HTTPS.
Errors related to SSL certificates.

Causes:

Misconfigured SSL/TLS settings.
Expired or invalid SSL certificates.

Solutions:

Ensure your SSL certificate is correctly installed and valid. You can check this using online tools like SSL Labs' SSL Test.
Make sure your server is configured to redirect HTTP traffic to HTTPS correctly.
Update your SSL/TLS libraries and configurations to support secure connections.

5. Server or Firewall Restrictions

Symptoms:

Inability to access endpoints due to server restrictions.
403 Forbidden errors.

Causes:

Server or firewall settings blocking API requests.
Security plugins interfering with API access.

Solutions:

Check your server’s firewall settings to ensure it allows traffic to and from the API endpoints.
Review any security plugins (e.g., WordFence, Sucuri) and ensure they are configured to allow REST API traffic.
Whitelist the IP addresses or domains making API requests if applicable.

Debugging Endpoint Issues

Use Tools to Test Endpoints:
- Postman: A powerful tool for testing API endpoints. You can easily configure and test different endpoints and see detailed responses.
- curl: A command-line tool to make API requests and inspect responses.
- Browser Developer Tools: Useful for checking network requests directly from your website.
Enable WooCommerce Debugging:
- Add the following lines to your wp-config.php file to enable debugging:
```
php
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);
```
- Check the wp-content/debug.log file for detailed error messages related to the REST API.
Check Server Logs:
- Review your server’s error logs (e.g., Apache, Nginx) for any issues that might be affecting the API endpoints.

Example Endpoint Usage

Fetching Products:

Endpoint:

http
GET https://yourdomain.com/wp-json/wc/v3/products

Using cURL:

bash
curl -X GET https://yourdomain.com/wp-json/wc/v3/products \
     -u consumer_key:consumer_secret

Using Postman:

Set the request type to GET.
Enter the URL https://yourdomain.com/wp-json/wc/v3/products.
In the Authorization tab, select Basic Auth and enter your Consumer Key and Consumer Secret.

Conclusion

Endpoint issues can significantly hinder the functionality of your WooCommerce REST API. By ensuring correct URL structures, configuring permalinks properly, and verifying API versions, you can resolve most endpoint-related problems. Additionally, addressing SSL/TLS configurations and server restrictions can help maintain a smooth and secure API operation.

Regularly test your endpoints using tools like Postman and keep your WooCommerce and WordPress installations updated to minimize compatibility issues.

Understanding CORS Issues with WooCommerce REST API

Cross-Origin Resource Sharing (CORS) is a security feature implemented in web browsers to prevent malicious websites from making unauthorized requests to another domain. While essential for security, CORS can sometimes interfere with legitimate API requests, including those made to the WooCommerce REST API. Here’s an in-depth look at CORS issues and how to resolve them.

What is CORS?

CORS is a security mechanism that allows servers to specify who can access their resources and how. When a web page attempts to make a request to a different domain than the one that served the web page, the browser sends an HTTP request header called Origin to the server. The server can then respond with specific headers that indicate whether the request is allowed.

Common CORS Issues

1. `403 Forbidden` Errors

Symptoms:

The browser blocks the request.
Receiving 403 Forbidden errors in the browser console.

Causes:

The server’s CORS policy is blocking the request.
Security settings or plugins on the server are preventing the request.

Solutions:

Adjust the server’s CORS policy to allow requests from the required origins.

2. `Access-Control-Allow-Origin` Header Missing

Symptoms:

The browser blocks the request.
Error messages in the browser console indicating the Access-Control-Allow-Origin header is missing.

Causes:

The server is not sending the necessary CORS headers.
Server misconfiguration or missing middleware for handling CORS.

Solutions:

Configure the server to include the Access-Control-Allow-Origin header in responses.

Configuring CORS for WooCommerce REST API

1. Modifying Server Configuration

For Apache:

Add the following lines to your .htaccess file to allow all origins:

apache
<IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
    Header set Access-Control-Allow-Methods "GET, POST, OPTIONS, DELETE, PUT"
    Header set Access-Control-Allow-Headers "Content-Type, Authorization"
</IfModule>

For Nginx:

Add the following lines to your server block to allow all origins:

nginx
server {
    location / {
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT';
            add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
            return 204;
        }

        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT';
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
    }
}

2. Using a WordPress Plugin

For users who prefer not to modify server configurations, WordPress plugins can handle CORS settings:

Example Plugin: WP CORS

Install and activate the WP CORS plugin.
Go to Settings > CORS in your WordPress admin panel.
Set the allowed origins and headers as needed.

3. Handling CORS in WooCommerce Plugin

WooCommerce itself does not handle CORS, so you may need to add custom code to your theme’s functions.php file to set the appropriate headers:

php
function add_cors_http_header() {
    header("Access-Control-Allow-Origin: *");
    header("Access-Control-Allow-Methods: GET, POST, OPTIONS, DELETE, PUT");
    header("Access-Control-Allow-Headers: Content-Type, Authorization");
}
add_action('init', 'add_cors_http_header');

Preflight Requests

When a web application sends a request that might affect user data, browsers send an additional "preflight" request using the OPTIONS method to ensure the server will accept the actual request. If the preflight request fails, the main request will not be sent.

Handling Preflight Requests

Ensure your server correctly handles OPTIONS requests:

For Apache:

apache
<IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
    Header set Access-Control-Allow-Methods "GET, POST, OPTIONS, DELETE, PUT"
    Header set Access-Control-Allow-Headers "Content-Type, Authorization"
</IfModule>

RewriteEngine On
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteRule ^(.*)$ $1 [R=200,L]

For Nginx:

nginx
server {
    location / {
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT';
            add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
            return 204;
        }

        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT';
        add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization';
    }
}

Testing CORS

Use tools like Postman or curl to test your API requests and ensure CORS headers are set correctly. Additionally, check the browser console for any CORS-related errors and validate the headers in the network request details.

Using curl:

bash
curl -X OPTIONS https://yourdomain.com/wp-json/wc/v3/products -i

Using Postman:

Create a new request and set the method to OPTIONS.
Enter the endpoint URL.
Send the request and check the response headers for Access-Control-Allow-Origin.

CORS issues can be a significant obstacle when working with the WooCommerce REST API, but understanding how to configure your server and WordPress environment can help resolve these problems. By ensuring that your server sends the appropriate headers and handles preflight requests correctly, you can allow legitimate cross-origin requests and maintain the security and functionality of your API.

Understanding SSL/TLS Issues with WooCommerce REST API

SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are protocols designed to provide secure communication over a computer network. When dealing with WooCommerce REST API, SSL/TLS issues can cause various problems, including connection errors, data interception, and authentication failures. Here's an in-depth look at SSL/TLS issues and their solutions.

Common SSL/TLS Issues

1. Invalid SSL Certificate

Symptoms:

Browsers show a security warning when accessing the API.
API requests fail with SSL errors.

Causes:

The SSL certificate is expired, self-signed, or issued by an untrusted Certificate Authority (CA).
The certificate is not correctly installed.

Solutions:

Ensure your SSL certificate is issued by a trusted CA (e.g., Let's Encrypt, Comodo, Symantec).
Renew the certificate if it is expired.
Use online tools like SSL Labs' SSL Test to check the validity and configuration of your SSL certificate.
Follow the CA's installation instructions carefully. For Apache, ensure the SSLCertificateFile and SSLCertificateKeyFile directives point to the correct files.

2. Misconfigured SSL/TLS Settings

Symptoms:

Inability to establish a secure connection.
Errors such as SSL certificate problem: unable to get local issuer certificate.

Causes:

Incorrect server configuration.
Outdated or insecure SSL/TLS protocols enabled.

Solutions:

Configure your server to use modern, secure SSL/TLS protocols (TLS 1.2 or TLS 1.3).
Disable outdated protocols (e.g., SSL 2.0, SSL 3.0, TLS 1.0, TLS 1.1).

For Apache:

apache
<VirtualHost *>
    SSLEngine on
    SSLCertificateFile /path/to/your_certificate.crt
    SSLCertificateKeyFile /path/to/your_private.key
    SSLCertificateChainFile /path/to/CA_bundle.crt

    SSLProtocol All -SSLv2 -SSLv3 -TLSv1 -TLSv1.1
    SSLCipherSuite HIGH:!aNULL:!MD5
</VirtualHost>

For Nginx:

nginx
server {
    listen 443 ssl;
    ssl_certificate /path/to/your_certificate.crt;
    ssl_certificate_key /path/to/your_private.key;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
}

3. Mixed Content Errors

Symptoms:

Web pages load over HTTPS, but certain resources (scripts, images) are blocked because they are served over HTTP.
Browser console shows mixed content warnings.

Causes:

Insecure HTTP resources are being called on a page served over HTTPS.

Solutions:

Ensure all resources (scripts, stylesheets, images) are loaded over HTTPS.
Use relative URLs or HTTPS in all asset references.

4. Intermediate Certificate Issues

Symptoms:

SSL/TLS connection errors despite having a valid certificate.
Errors indicating missing intermediate certificates.

Causes:

The server is not providing the full certificate chain, including intermediate certificates.

Solutions:

Ensure you install the intermediate certificate bundle provided by your CA.
Verify the certificate chain using tools like SSL Labs' SSL Test.

For Apache:

apache
SSLCertificateFile /path/to/your_certificate.crt
SSLCertificateKeyFile /path/to/your_private.key
SSLCertificateChainFile /path/to/CA_bundle.crt

For Nginx:

nginx
ssl_certificate /path/to/your_certificate_and_intermediates.crt;
ssl_certificate_key /path/to/your_private.key;

5. Certificate Revocation

Symptoms:

SSL/TLS connections fail or show warnings about revoked certificates.

Causes:

The SSL certificate has been revoked by the CA due to a security breach or other issues.

Solutions:

Contact your CA to understand the reason for revocation.
Obtain and install a new SSL certificate.

Debugging SSL/TLS Issues

Check Certificate Validity: Use tools like SSL Labs' SSL Test or whynopadlock.com to validate your SSL certificate and identify any issues.
Browser Developer Tools: Inspect network requests in browser developer tools (F12) to see SSL/TLS error messages.
Command Line Tools: Use curl to test SSL/TLS connections and see detailed error messages:
```
bash
curl -v https://yourdomain.com/wp-json/wc/v3/products
```
Server Logs: Check your server’s error logs (e.g., Apache, Nginx) for SSL/TLS-related error messages.

Example Configurations

Apache Example:

apache
<VirtualHost *>
    SSLEngine on
    SSLCertificateFile /etc/ssl/certs/your_certificate.crt
    SSLCertificateKeyFile /etc/ssl/private/your_private.key
    SSLCertificateChainFile /etc/ssl/certs/CA_bundle.crt

    SSLProtocol All -SSLv2 -SSLv3 -TLSv1 -TLSv1.1
    SSLCipherSuite HIGH:!aNULL:!MD5

    <Directory /var/www/html>
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

Nginx Example:

nginx
server {
    listen 443 ssl;
    server_name yourdomain.com;

    ssl_certificate /etc/ssl/certs/your_certificate_and_intermediates.crt;
    ssl_certificate_key /etc/ssl/private/your_private.key;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;

    location / {
        root /var/www/html;
        index index.php index.html index.htm;
        try_files $uri $uri/ =404;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
    }

    location ~ /\.ht {
        deny all;
    }
}

SSL/TLS issues can severely impact the functionality and security of your WooCommerce REST API. By ensuring your SSL certificates are valid, properly installed, and configured with modern security protocols, you can mitigate most SSL/TLS-related problems. Regularly test and monitor your SSL/TLS setup to maintain secure communications between clients and your WooCommerce store.

Woocommerce REST API not working

Troubleshooting WooCommerce REST API Issues

Understanding the WooCommerce REST API

Common Issues and Solutions

1. Authentication Problems

2. Endpoint Issues

3. CORS (Cross-Origin Resource Sharing) Issues

4. SSL/TLS Issues

5. Plugin or Theme Conflicts

6. Rate Limiting and Throttling

7. Server-Side Configuration

Authentication Problems

Types of Authentication

Common Authentication Problems

1. Incorrect API Keys

2. Misconfigured Authentication Headers

3. Incorrect Permissions

4. Expired or Revoked API Keys

5. Incorrect Endpoint or URL Structure

Example Requests

Basic Authentication Example

OAuth 1.0a Authentication Example

Tools and Resources

Endpoint Issues

Common Endpoint Issues

1. Incorrect Endpoint URLs

2. Permalink Settings

3. API Version Mismatch

4. SSL/TLS Configuration

5. Server or Firewall Restrictions

Debugging Endpoint Issues

Example Endpoint Usage

Conclusion

Understanding CORS Issues with WooCommerce REST API

What is CORS?

Common CORS Issues

1. 403 Forbidden Errors

2. Access-Control-Allow-Origin Header Missing

Configuring CORS for WooCommerce REST API

1. Modifying Server Configuration

2. Using a WordPress Plugin

3. Handling CORS in WooCommerce Plugin

Preflight Requests

Handling Preflight Requests

Testing CORS

Understanding SSL/TLS Issues with WooCommerce REST API

Common SSL/TLS Issues

1. Invalid SSL Certificate

2. Misconfigured SSL/TLS Settings

3. Mixed Content Errors

4. Intermediate Certificate Issues

5. Certificate Revocation

Debugging SSL/TLS Issues

Example Configurations

1. `403 Forbidden` Errors

2. `Access-Control-Allow-Origin` Header Missing