Proxy Routing Cache Problem When Using Swagger-UI

[seymabatige]

Hi,

I've been migrating one of my applications from springfox to springdoc and I've run into the very same problem as in #331

I start both my application and the proxy. When I go to swagger ui directly from my application and then through the proxy, it seems to cache the config url and in one of two ways I get :
Failed to load remote configuration error. swagger-config gets 404 due to incorrectly created config url. (When I go through the application endpoint, it adds the forwarded prefix,
or when I go through the proxy, it lacks the forwarded prefix)

I added "server.forward-headers-strategy:framework" to my application yml file and in my swagger config class I added the following bean :

@Bean
fun forwardedHeaderFilter(): ForwardedHeaderFilter? {
    return ForwardedHeaderFilter()
}

I also disabled springdoc cache as suggested in issue 331. However, it didn't work and when I debug it seems to be caching the config url although springdoc cache is disabled.
My springdoc-openapi version is 1.6.3 and spring-boot version is 2.6.2

Thanks for your help

[bnasslahsen]

@seymabatige,

There are no known proxy issues. Note that demos are served behind proxies...

• Why are you mentioning configURL which is not present by default in v1.6.3 (are you adding your own configUrl ...) ?

Your description is unclear. Try describing your steps to reproduce one by one. (Use GITHUB formatting).

• Make sure you provide a Minimal, Reproducible Example - with HelloController that reproduces the problem
• Share your poxy configuration.

[bnasslahsen]

@seymabatige,

This ticket will be closed and can be reopened if any relevant information is provided.

[abenjell]

Hello @bnasslahsen ,
I reproduce the same described issue:
When I access to the swagger ui the first time behind the proxy it works fine:
URL with proxy : http://localhost/api/v0/myservice/swagger-ui/index.html
but when i access to the swagger with direct access ( url: http://localhost:8080/api/v0/swagger-ui/index.html) it doesn't work because it use the old config URL = "http://localhost:8080/api/v0/myservice/v3/api-docs/swagger-config".

The problem is that configUrl is not built each time even if the cache is disabled.
used versions
springdoc-openapi-ui : 1.6.9
spring-boot:2.6.6
Please find HelloController with nginxConfig

Thank you in advance for your help

[abenjell]

Hello @seymabatige,
Did you resolve the problem?
Thanks

[seymabatige]

hi @abenjell actually I couldn't resolve the problem. Since I always access the endpoint through proxy, it does not create a problem in the actual environment.

[abenjell]

Ok thank you for your feedback @seymabatige

[antechrestos]

@seymabatige did you find a solution?
I observe the same behaviour with the same approach...

@bnasslahsen any news on the subject?

[antechrestos]

Apparently the issue also impacts automatically generated server url

[abenjell]

Hello,
for information i create new issue here:
#1712

[antechrestos]

I put a hack for this problem in #1712