### What problem does this PR solve?
Three Go drivers had `CheckConnection` returning a hardcoded `no such
method` error, even though each one already has a working `ListModels`
that hits the configured base URL with the configured API key. So the
"Check connection" button in the model provider UI always failed for
these three providers, even when the underlying setup was fine.
Affected drivers:
- `internal/entity/models/ollama.go`
- `internal/entity/models/lmstudio.go`
- `internal/entity/models/vllm.go`
This is a real user-facing gap because Ollama and LM Studio are two of
the most popular local LLM runners, and vLLM is widely used for
self-hosted deployments.
### What this PR includes
For each of the three drivers, replace the stub with a small
implementation that calls `ListModels` and returns its error:
```go
func (o *OllamaModel) CheckConnection(apiConfig *APIConfig) error {
_, err := o.ListModels(apiConfig)
return err
}
```
This is the exact pattern that xai, moonshot, deepseek, aliyun, and
gitee already use for the same method.
No JSON change. No factory change. No interface change.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### How was this tested?
- `go build ./internal/entity/models/...` in a clean go 1.25 image (the
go.mod minimum) returns exit 0.
- The full ModelDriver interface still resolves on each driver
(NewInstance, Name, ChatWithMessages, ChatStreamlyWithSender, Encode,
Rerank, ListModels, Balance, CheckConnection).
- Pattern parity with the existing xai, moonshot, deepseek, aliyun, and
gitee CheckConnection methods.
Closes#14609
### What problem does this PR solve?
implement `Ollama` provider
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
- [x] Refactoring
---------
Co-authored-by: Jin Hai <haijin.chn@gmail.com>
### What problem does this PR solve?
Implement the vLLM model provider for RAGFlow to fully support local and
self-hosted open-source models (e.g., Qwen, GLM, Llama) via the vLLM
framework, and fix several critical bugs related to model instance
management and API requests.
**Key changes and fixes:**
1. **Added Standard vLLM Provider (`vllm.go`, `vllm.json`):**
- Implemented `VllmModel` driver strictly adhering to the OpenAI API
specification.
- Removed hardcoded and dangerous routing logic (e.g., forcing
`AsyncChat` for Qwen/GLM prefixes), ensuring standard
`/v1/chat/completions` compatibility.
- Refactored `ListModels` to use safe JSON parsing (resolving nil
pointer panics) and standard `GET` requests without bodies.
- Added `APIConfig.Region` fallback logic to prevent empty `base_url`
fetching when checking models.
2. **Fixed `ChatToModelStreamWithSender` Bug (`model_service.go`):**
- Resolved the `model is disabled` error when streaming chat with local
database-saved models.
- Added the missing `if modelInfo.Status == "active"` block to correctly
invoke `NewInstance` and inject the dynamic `base_url` into the provider
driver before starting the SSE stream.
3. **Fixed `ListSupportedModels` Bug (`model_service.go`):**
- Added dynamic `NewInstance` injection for `base_url`. Previously, the
list models function used the static JSON config without injecting
user-configured dynamic URLs from the database, resulting in an
`unsupported protocol scheme ""` error.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
1. support command:
```
RAGFlow(user)> create provider 'vllm' instance 'test' key 'test-key' url 'base-url' region 'abc';
SUCCESS
RAGFlow(user)> list instances from 'vllm';
+----------+----------------------------------------+----------------------------------+--------------+----------------------------------+--------+
| apiKey | extra | id | instanceName | providerID | status |
+----------+----------------------------------------+----------------------------------+--------------+----------------------------------+--------+
| test-key | {"base_url":"base-url","region":"abc"} | 40213c89430311f1a7cf38a74640adcc | test | b4d40e6142d311f1a4f938a74640adcc | enable |
+----------+----------------------------------------+----------------------------------+--------------+----------------------------------+--------+
```
2. support add vllm model
```
RAGFlow(user)> add model 'Qwen/Qwen2-0.5B' to provider 'vllm' instance 'test' with tokens 131072 chat;
SUCCESS
```
3. add vllm chat
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
- [x] Refactoring
---------
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
