## Issue
#1506
## Change
Resolved version conflict:
```
[ERROR] Rule 0: org.apache.maven.enforcer.rules.dependency.DependencyConvergence failed with message:
[ERROR] Failed while enforcing releasability.
[ERROR]
[ERROR] Dependency convergence error for org.jetbrains.kotlin:kotlin-stdlib-jdk8:jar:1.9.10 paths to dependency are:
[ERROR] +-dev.langchain4j:langchain4j-ollama:jar:0.34.0-SNAPSHOT
[ERROR] +-com.squareup.okhttp3:okhttp:jar:4.12.0:compile
[ERROR] +-com.squareup.okio:okio:jar:3.6.0:compile
[ERROR] +-com.squareup.okio:okio-jvm:jar:3.6.0:compile
[ERROR] +-org.jetbrains.kotlin:kotlin-stdlib-jdk8:jar:1.9.10:compile
[ERROR] and
[ERROR] +-dev.langchain4j:langchain4j-ollama:jar:0.34.0-SNAPSHOT
[ERROR] +-com.squareup.okhttp3:okhttp:jar:4.12.0:compile
[ERROR] +-org.jetbrains.kotlin:kotlin-stdlib-jdk8:jar:1.8.21:compile
[ERROR]
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <args> -rf :langchain4j-ollama
```
... caused by 'okhttp' dependency and enabled Maven enforcer plugin in
the following modules:
- LangChain4j :: Integration :: Anthropic
- LangChain4j :: Integration :: ChatGLM
- LangChain4j :: Integration :: Chroma
- LangChain4j :: Integration :: CloudFlare Workers AI
- LangChain4j :: Integration :: Cohere
- LangChain4j :: Integration :: DashScope
- LangChain4j :: Integration :: Hugging Face
- LangChain4j :: Integration :: Jina
- LangChain4j :: Integration :: Judge0
- LangChain4j :: Integration :: MistralAI
- LangChain4j :: Integration :: Nomic
- LangChain4j :: Integration :: OVHcloud AI
- LangChain4j :: Integration :: Ollama
- LangChain4j :: Integration :: Qianfan
- LangChain4j :: Integration :: Vearch
- LangChain4j :: Integration :: Vespa
- LangChain4j :: Integration :: Zhipu AI
- LangChain4j :: Web Search Engine :: SearchApi
- LangChain4j :: Web Search Engine :: Tavily
## Note
Please note that [issue ](https://github.com/square/okhttp/issues/8288)
for this was already created in `httpok` repository but it will not be
fixed in 4.x. It's reportedly already tackled in version 5.x.
With that in mind I suggest we apply temporary changes proposed in this
PR. After upgrading to `httpok` 5.x we will be able to remove these.
## Tests
`mvn clean test` passed
## Issue
Closes#1465
## Change
According to
[retrofit](https://github.com/square/retrofit/blob/trunk/retrofit%2Fsrc%2Fmain%2Fjava%2Fretrofit2%2FRetrofit.java#L564)
base urls should always end with `/`.
Added new utility method to ensure that a provided base url always ends
with a `/` and checked existing API classes so that they all start
**without** a `/`.
### Tests
I have added unit test for the new utility method but testing the actual
invocation of the method in the different builder classes is harder. The
existing Ollama test case spins up a temporary web server and I don't
want to replicate this to al lmodules since I suspect build times will
increase a lot etc.
Thoughts?
## General checklist
- [X] There are no breaking changes
- [X] I have added unit and integration tests for my change
- [X] I have manually run all the unit and integration tests in the
module I have added/changed, and they are all green
- [X] I have manually run all the unit and integration tests in the
[core](https://github.com/langchain4j/langchain4j/tree/main/langchain4j-core)
and
[main](https://github.com/langchain4j/langchain4j/tree/main/langchain4j)
modules, and they are all green
<!-- Before adding documentation and example(s) (below), please wait
until the PR is reviewed and approved. -->
- [ ] I have added/updated the
[documentation](https://github.com/langchain4j/langchain4j/tree/main/docs/docs)
- [ ] I have added an example in the [examples
repo](https://github.com/langchain4j/langchain4j-examples) (only for
"big" features)
- [ ] I have added/updated [Spring Boot
starter(s)](https://github.com/langchain4j/langchain4j-spring) (if
applicable)
LangChain4j