request-intercept | Interceptor library for all requests , both native fetch | HTTP Client library

I'm trying to solve this: How to rewrite URLs with Spring (Boot) via REST Controllers? by creating some kind of "filter" which would be applied to every incoming HTTP request.

The matter is covered by some answers like for this question: Spring Boot Adding Http Request Interceptors but interface HandlerInterceptor deals with javax' HttpServletRequest and HttpServletResponse which are not as practical as the new class introduced by Spring i.e. the ServerWebExchange (see the use of setLocation() in the code below) which appears in an interface whose name sounds promising, org.springframework.web.server.WebFilter:

So I ended with something like:

I am trying to have basic authentication on below defined api. i have disabled default security using x-wso2-disable-security: true but it also disables rate limiting defined on it. No sure why this is the case.

I am attempting to download PDF's from a webpage where there are multiple PDF links on a single page. The first issue is that when click()-ing the links it automatically brings up a new tab or page. I've researched this a ton - and the behavior seems to be inherent - and unchangeable. So - my next route to buffering in all this content is to set a request-interceptor that takes every similar request (with exception of a URL parameter that changes) and using the browser cookies - copy the request and send it using a different request library.

This brings me to my main question - what is the best way to set a every new page to basically "hook" into my request interceptor when upon it's creation? I've already looked at the requests going out of my primary page - and it seems that it's within the NEW tabs where the request is sent.

Anybody know how this would be done?

My application works fine when served with the ng serve command or with the ng serve --prod command, but when I build it for production with the ng build --prod command and then serve it with the http-server -p 8080 -c-1 dist/ng-zero command or with the live-server --entry-file=dist/index.html command, any request has a 404 response.

I had a look at different questions and their answers here, but nothing helped. I tried the HashLocationStrategy suggestion, I tried the useHash: true one too, to no success.

The Http server starting the application:

When I want to delete an item from the index, it fails and shows us the next trace of ERROR:

org.springframework.data.elasticsearch.ElasticsearchException: Cannot execute jest action , response code : 403 , error : 403 Forbidden , message : The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.

I have created a "removeBy..." method in the ElasticsearchRepository repository to remove items from our index:

I've looked at similar problems:

how to intercept all requests in spring REST controllers?

spring boot adding http request interceptors

And still can't figure out the solution. I have a Spring Boot app that runs a bunch of Rest Controllers and want to intercept calls and perform some business logic before the request is passed to the controllers. I have this:

My Application class for Sprint Boot: