tools400 opened a new pull request, #25752:
URL: https://github.com/apache/camel/pull/25752

   RestOpenApiHelper.determineBasePath() always falls back to DEFAULT_BASE_PATH 
("/") when the OpenAPI servers[0].url has no path segment, so the effective 
base path is never truly empty. In 
VertxPlatformHttpConsumer.startRestServicesContractFirst(), the Vert.x route 
path was built by plain concatenation of basePath + baseUrl ("/" + "/hello" -> 
"//hello"), which Vert.x normalizes away when matching incoming requests, 
making every contract-first route permanently unreachable whenever the 
contract's base path is root.
   
   Normalize the join via a new buildNormalizedEndpoint() helper that strips a 
trailing slash from the base path before concatenation, used at both call sites 
(operation routes and the api-specification route).
   
   Add regression tests covering a contract-first spec without a path segment 
in servers[0].url.
   
   # Description
   
   The merge request fixes the problem, that _Contract First_ APIs always 
return 404, if no base path has been set in `servers[0].url`.
   
   # Target
   
   - [x] I checked that the commit is targeting the correct branch (Camel 4 
uses the `main` branch)
   
   # Tracking
   - [ ] If this is a large change, bug fix, or code improvement, I checked 
there is a [JIRA issue](https://issues.apache.org/jira/browse/CAMEL) filed for 
the change (usually before you start working on it).
   
   # Apache Camel coding standards and style
   
   - [x] I checked that each commit in the pull request has a meaningful 
subject line and body.
   
   - [ ] I have run `mvn clean install -DskipTests` locally from root folder 
and I have committed all auto-generated changes.
   
   # AI-assisted contributions
   
   - [x] If this PR includes AI-generated code, commits have proper 
co-authorship attribution (e.g., `Co-authored-by` trailers) and the PR 
description identifies the AI tool used.
   
   


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