How to configure Tomcat to allow cross-origin access?

1 year ago
Liam
1 minute

To configure Tomcat to allow cross-origin access, you can follow these steps:

  1. I am having a hard time.
  2. conf = conference
  3. configuration file for Java web applications
  4. Locate the following code block:
<!-- ============================== Default Mappings ============================== -->
<default-servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
    <init-param>
        <param-name>debug</param-name>
        <param-value>0</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</default-servlet>
  1. Add the following code below this code block:
<!-- ============================== CORS Filter ============================== -->
<filter>
    <filter-name>CorsFilter</filter-name>
    <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>CorsFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
  1. configuration file for a web application
  2. Restart the Tomcat server.

By using the above configuration, Tomcat will allow all requests to access resources across different domains. If you want to more precisely control the domains or request headers allowed for cross-origin access, you can modify the configuration parameters of CorsFilter. Specific configuration methods can be found in Tomcat’s official documentation.

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