ajp_pass_header
The `ajp_pass_header` directive specifies which HTTP response headers should be passed from the AJP server to the client.
Description
The ajp_pass_header directive is utilized in the context of connecting NGINX as a reverse proxy to AJP-enabled servers, typically used in environments like Apache Tomcat. By using this directive, you can control which specific headers from the AJP response will be forwarded to the client. This is instrumental when you want to manage the flow of certain headers without overwhelming the client with unnecessary data or ensuring certain headers are passed for application-specific requirements. The directive takes a single parameter that can either be a specific header name to be passed along or the special flag 'all' to allow all headers to be forwarded.
In practical terms, when configured, ajp_pass_header reads the response from the upstream AJP server and selectively forwards the specified headers based on what you defined with the directive. Since it can be defined in http, server, or location contexts, it allows for broad or granular control of header management based on the routing structure of the NGINX configuration. This flexibility ensures that different parts of a web application can customize their response behavior according to their needs without impacting other areas of the application.
Config Example
location / {
ajp_pass tomcats;
ajp_pass_header Set-Cookie;
ajp_pass_header Content-Type;
}Ensure the header names are correctly spelled and case-sensitive as they appear in the AJP response.
Using 'all' without understanding the impact may expose sensitive or unnecessary information to clients.