tmimmanuel d63d3bb7d2 Go: implement provider: Novita.ai (#14850)
### What problem does this PR solve?

Add a Go driver for Novita.ai (https://novita.ai), one of the unchecked
providers on the umbrella tracking issue #14736. Novita exposes an
OpenAI-compatible REST API at `https://api.novita.ai/v3/openai` and
proxies a large catalog of third-party models (DeepSeek, Llama, Qwen3,
Kimi, Gemma, Mistral, MiniMax, GLM, etc.) behind a single OpenAI-shaped
surface — 102 models live at the time of writing.

Until this PR, a tenant who configured `novita` as a model provider in
the Go layer fell through to the default branch of
`internal/entity/models/factory.go` and got the dummy driver.

### What this PR includes

- New `internal/entity/models/novita.go` with a `NovitaModel`
implementing the `ModelDriver` interface (~520 lines).
- New `conf/models/novita.json` with 7 representative chat models
(DeepSeek-V4, Llama-3.3-70B, Qwen3-30B/235B reasoning, Kimi-K2,
Gemma-3-27B, Mistral-Nemo).
- `factory.go`: route `"novita"` to `NewNovitaModel`.
- `internal/entity/models/novita_test.go`: 23 unit tests.

### Notable design point: `<think>...</think>` reasoning extraction

Novita-routed reasoning models like `qwen3-*` and `deepseek-r1-*` embed
their chain-of-thought **inline inside content as `<think>...</think>`
tags**, rather than in a separate `reasoning_content` field. Verified
live by probing `api.novita.ai`:

```
content head 200: <think>
Okay, let's see. I need to find 15% of 80. Hmm, percentages can sometimes be tricky, but I think
content tail 100: h, that works.
Alternatively, 0.15 × 80. If I move the decimal two places to the left for </think>
```

Without handling, a tenant picking qwen3 via Novita would see raw
`<think>` tags in their UI answer — different from every other reasoning
provider in the Go layer.

The driver detects those tags and routes the inner text to
`ChatResponse.ReasonContent` (non-stream) or the sender's second arg
(stream), keeping the visible answer clean of tag clutter:

- **`splitNovitaThink`** — scans a complete content string. Used by the
non-streaming path. Handles multiple `<think>` blocks, unclosed tags
(the model got cut off mid-reasoning), pure-text content with no tags.
- **`novitaThinkExtractor`** — stateful streaming version. Buffers
trailing bytes that might be the start of a tag (e.g. `<thi` held back
when the next chunk completes `nk>`), then emits segments in routing
order so callers can pipe them to a UI. Tested with byte-level chunk
boundaries and tag-spanning scenarios.

### Method coverage

| Method | Behavior |
|---|---|
| `ChatWithMessages` | `POST /v3/openai/chat/completions`, `<think>`
extraction on response |
| `ChatStreamlyWithSender` | SSE stream, stateful `<think>` extraction
across deltas |
| `ListModels` / `CheckConnection` | `GET /v3/openai/models` (102 live)
|
| `Embed` / `Rerank` / `Balance` / `TranscribeAudio` / `AudioSpeech` /
`OCRFile` | `"no such method"` — Novita's OpenAI-compatible surface does
not expose any |

No interface change. No new dependencies.

### How was this tested?

**23 unit tests** in `internal/entity/models/novita_test.go` — all pass:

```
$ go test -vet=off -run "TestNovita|TestSplitNovita" -count=1 ./internal/entity/models/...
ok      ragflow/internal/entity/models  0.020s
```

Coverage:

- `splitNovitaThink` (5 cases: pure text, single block, leading text,
multiple blocks, unclosed tag)
- `novitaThinkExtractor` (6 cases: single-chunk, opening tag span,
closing tag span, byte-level chunking, no tags, lone `<` not as tag
start)
- `ChatWithMessages`: pure text, with `<think>` tags, missing API key,
empty messages, HTTP error
- `ChatStreamlyWithSender`: tag-stripping with spanning deltas, pure
content, sender-required, stream-true-required
- `ListModels` / `CheckConnection` (happy paths)
- All sentinel methods

`go build ./internal/entity/models/...` exits 0 on go 1.25.

**Live integration test** against `api.novita.ai/v3/openai`:

```
=== RUN   TestNovitaLiveSmoke
    [OK] Name() = "novita"
    [OK] CheckConnection
    [OK] ListModels: 102 models (showing first 6) [deepseek/deepseek-v4-pro deepseek/deepseek-v4-flash deepseek/deepseek-v3.2 xiaomimimo/mimo-v2.5-pro moonshotai/kimi-k2.6 zai-org/glm-5.1]
    [OK] Chat (llama-3.3) answer="ok" reason=""
    [OK] Chat (qwen3) answer len=0 head=""
                  ReasonContent len=1657 head="Okay, so I need to figure out what 15% of 80 is. Hmm, percentages can sometimes trip me up, but let ..."
    [OK] Stream content: 0 chunks, 0 chars; reasoning: 600 chunks, 1667 chars
    [OK] Embed/Rerank/Balance/TranscribeAudio/AudioSpeech/OCRFile all return "novita, no such method"

NOVITA LIVE SMOKE PASSED
--- PASS: TestNovitaLiveSmoke (26.18s)
```

What the live run proves on the wire:

- Auth (`Bearer <key>`) accepted by `api.novita.ai`.
- `/v3/openai/models` parser handles the real 102-model response.
- Non-stream chat against `meta-llama/llama-3.3-70b-instruct`: clean
string answer, empty ReasonContent (non-reasoning model, pure-text
path).
- Non-stream chat against `qwen/qwen3-30b-a3b-fp8`: 1657-char reasoning
extracted from `<think>...</think>` and routed to
`ChatResponse.ReasonContent`. Visible answer is 0 chars in this run
because qwen3 spent its 600-token budget entirely on reasoning before
reaching the answer phase — that's the model's behavior, not a driver
bug. The important thing: **no `<think>` tags leaked into the visible
Answer field**.
- Streaming against qwen3: 600 reasoning chunks (1667 chars) emitted via
the sender's 2nd arg across SSE deltas; **no `<think>` tag fragments
leaked into the content channel** despite tag boundaries crossing chunk
boundaries on the wire.
- All 6 sentinel methods return the documented `"no such method"`
strings.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

Tracking: #14736
2026-05-13 14:10:50 +08:00
2026-04-14 19:32:16 +08:00
2026-05-12 09:31:47 +08:00
2026-04-24 20:36:47 +08:00
2026-04-24 20:36:47 +08:00
2026-04-14 15:24:43 +08:00
2023-12-12 14:13:13 +08:00
2026-03-27 18:12:56 +08:00
2026-04-24 10:02:22 +08:00

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infiniflow%2Fragflow | Trendshift
📕 Table of Contents

💡 What is RAGFlow?

RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capabilities to create a superior context layer for LLMs. It offers a streamlined RAG workflow adaptable to enterprises of any scale. Powered by a converged context engine and pre-built agent templates, RAGFlow enables developers to transform complex data into high-fidelity, production-ready AI systems with exceptional efficiency and precision.

🎮 Get Started

Try our cloud service at https://cloud.ragflow.io.

🔥 Latest Updates

  • 2026-04-24 Supports DeepSeek v4.
  • 2026-03-24 RAGFlow Skill on OpenClaw — Provides an official skill for accessing RAGFlow datasets via OpenClaw.
  • 2025-12-26 Supports 'Memory' for AI agent.
  • 2025-11-19 Supports Gemini 3 Pro.
  • 2025-11-12 Supports data synchronization from Confluence, S3, Notion, Discord, Google Drive.
  • 2025-10-23 Supports MinerU & Docling as document parsing methods.
  • 2025-10-15 Supports orchestrable ingestion pipeline.
  • 2025-08-08 Supports OpenAI's latest GPT-5 series models.
  • 2025-08-01 Supports agentic workflow and MCP.
  • 2025-05-23 Adds a Python/JavaScript code executor component to Agent.
  • 2025-05-05 Supports cross-language query.
  • 2025-03-19 Supports using a multi-modal model to make sense of images within PDF or DOCX files.

🎉 Stay Tuned

Star our repository to stay up-to-date with exciting new features and improvements! Get instant notifications for new releases! 🌟

🌟 Key Features

🍭 "Quality in, quality out"

  • Deep document understanding-based knowledge extraction from unstructured data with complicated formats.
  • Finds "needle in a data haystack" of literally unlimited tokens.

🍱 Template-based chunking

  • Intelligent and explainable.
  • Plenty of template options to choose from.

🌱 Grounded citations with reduced hallucinations

  • Visualization of text chunking to allow human intervention.
  • Quick view of the key references and traceable citations to support grounded answers.

🍔 Compatibility with heterogeneous data sources

  • Supports Word, slides, excel, txt, images, scanned copies, structured data, web pages, and more.

🛀 Automated and effortless RAG workflow

  • Streamlined RAG orchestration catered to both personal and large businesses.
  • Configurable LLMs as well as embedding models.
  • Multiple recall paired with fused re-ranking.
  • Intuitive APIs for seamless integration with business.

🔎 System Architecture

🎬 Self-Hosting

📝 Prerequisites

  • CPU >= 4 cores
  • RAM >= 16 GB
  • Disk >= 50 GB
  • Docker >= 24.0.0 & Docker Compose >= v2.26.1
  • gVisor: Required only if you intend to use the code executor (sandbox) feature of RAGFlow.

Tip

If you have not installed Docker on your local machine (Windows, Mac, or Linux), see Install Docker Engine.

🚀 Start up the server

  1. Ensure vm.max_map_count >= 262144:

    To check the value of vm.max_map_count:

    $ sysctl vm.max_map_count
    

    Reset vm.max_map_count to a value at least 262144 if it is not.

    # In this case, we set it to 262144:
    $ sudo sysctl -w vm.max_map_count=262144
    

    This change will be reset after a system reboot. To ensure your change remains permanent, add or update the vm.max_map_count value in /etc/sysctl.conf accordingly:

    vm.max_map_count=262144
    
  2. Clone the repo:

    $ git clone https://github.com/infiniflow/ragflow.git
    
  3. Start up the server using the pre-built Docker images:

Caution

All Docker images are built for x86 platforms. We don't currently offer Docker images for ARM64. If you are on an ARM64 platform, follow this guide to build a Docker image compatible with your system.

The command below downloads the v0.25.2 edition of the RAGFlow Docker image. See the following table for descriptions of different RAGFlow editions. To download a RAGFlow edition different from v0.25.2, update the RAGFLOW_IMAGE variable accordingly in docker/.env before using docker compose to start the server.

   $ cd ragflow/docker

   # git checkout v0.25.2
   # Optional: use a stable tag (see releases: https://github.com/infiniflow/ragflow/releases)
   # This step ensures the **entrypoint.sh** file in the code matches the Docker image version.

   # Use CPU for DeepDoc tasks:
   $ docker compose -f docker-compose.yml up -d

   # To use GPU to accelerate DeepDoc tasks:
   # sed -i '1i DEVICE=gpu' .env
   # docker compose -f docker-compose.yml up -d

Note: Prior to v0.22.0, we provided both images with embedding models and slim images without embedding models. Details as follows:

RAGFlow image tag Image size (GB) Has embedding models? Stable?
v0.21.1 ≈9 ✔️ Stable release
v0.21.1-slim ≈2 Stable release

Starting with v0.22.0, we ship only the slim edition and no longer append the -slim suffix to the image tag.

  1. Check the server status after having the server up and running:

    $ docker logs -f docker-ragflow-cpu-1
    

    The following output confirms a successful launch of the system:

    
          ____   ___    ______ ______ __
         / __ \ /   |  / ____// ____// /____  _      __
        / /_/ // /| | / / __ / /_   / // __ \| | /| / /
       / _, _// ___ |/ /_/ // __/  / // /_/ /| |/ |/ /
      /_/ |_|/_/  |_|\____//_/    /_/ \____/ |__/|__/
    
     * Running on all addresses (0.0.0.0)
    

    If you skip this confirmation step and directly log in to RAGFlow, your browser may prompt a network abnormal error because, at that moment, your RAGFlow may not be fully initialized.

  2. In your web browser, enter the IP address of your server and log in to RAGFlow.

    With the default settings, you only need to enter http://IP_OF_YOUR_MACHINE (sans port number) as the default HTTP serving port 80 can be omitted when using the default configurations.

  3. In service_conf.yaml.template, select the desired LLM factory in user_default_llm and update the API_KEY field with the corresponding API key.

    See llm_api_key_setup for more information.

    The show is on!

🔧 Configurations

When it comes to system configurations, you will need to manage the following files:

  • .env: Keeps the fundamental setups for the system, such as SVR_HTTP_PORT, MYSQL_PASSWORD, and MINIO_PASSWORD.
  • service_conf.yaml.template: Configures the back-end services. The environment variables in this file will be automatically populated when the Docker container starts. Any environment variables set within the Docker container will be available for use, allowing you to customize service behavior based on the deployment environment.
  • docker-compose.yml: The system relies on docker-compose.yml to start up.

The ./docker/README file provides a detailed description of the environment settings and service configurations which can be used as ${ENV_VARS} in the service_conf.yaml.template file.

To update the default HTTP serving port (80), go to docker-compose.yml and change 80:80 to <YOUR_SERVING_PORT>:80.

Updates to the above configurations require a reboot of all containers to take effect:

$ docker compose -f docker-compose.yml up -d

Switch doc engine from Elasticsearch to Infinity

RAGFlow uses Elasticsearch by default for storing full text and vectors. To switch to Infinity, follow these steps:

  1. Stop all running containers:

    $ docker compose -f docker/docker-compose.yml down -v
    

Warning

-v will delete the docker container volumes, and the existing data will be cleared.

  1. Set DOC_ENGINE in docker/.env to infinity.

  2. Start the containers:

    $ docker compose -f docker-compose.yml up -d
    

Warning

Switching to Infinity on a Linux/arm64 machine is not yet officially supported.

🔧 Build a Docker image

This image is approximately 2 GB in size and relies on external LLM and embedding services.

git clone https://github.com/infiniflow/ragflow.git
cd ragflow/
docker build --platform linux/amd64 -f Dockerfile -t infiniflow/ragflow:nightly .

Or if you are behind a proxy, you can pass proxy arguments:

docker build --platform linux/amd64 \
  --build-arg http_proxy=http://YOUR_PROXY:PORT \
  --build-arg https_proxy=http://YOUR_PROXY:PORT \
  -f Dockerfile -t infiniflow/ragflow:nightly .

🔨 Launch service from source for development

  1. Install uv and pre-commit, or skip this step if they are already installed:

    pipx install uv pre-commit
    
  2. Clone the source code and install Python dependencies:

    git clone https://github.com/infiniflow/ragflow.git
    cd ragflow/
    uv sync --python 3.12 # install RAGFlow dependent python modules
    uv run python3 download_deps.py
    pre-commit install
    
  3. Launch the dependent services (MinIO, Elasticsearch, Redis, and MySQL) using Docker Compose:

    docker compose -f docker/docker-compose-base.yml up -d
    

    Add the following line to /etc/hosts to resolve all hosts specified in docker/.env to 127.0.0.1:

    127.0.0.1       es01 infinity mysql minio redis sandbox-executor-manager
    
  4. If you cannot access HuggingFace, set the HF_ENDPOINT environment variable to use a mirror site:

    export HF_ENDPOINT=https://hf-mirror.com
    
  5. If your operating system does not have jemalloc, please install it as follows:

    # Ubuntu
    sudo apt-get install libjemalloc-dev
    # CentOS
    sudo yum install jemalloc
    # OpenSUSE
    sudo zypper install jemalloc
    # macOS
    sudo brew install jemalloc
    
  6. Launch backend service:

    source .venv/bin/activate
    export PYTHONPATH=$(pwd)
    bash docker/launch_backend_service.sh
    
  7. Install frontend dependencies:

    cd web
    npm install
    
  8. Launch frontend service:

    npm run dev
    

    The following output confirms a successful launch of the system:

  9. Stop RAGFlow front-end and back-end service after development is complete:

    pkill -f "ragflow_server.py|task_executor.py"
    

📚 Documentation

📜 Roadmap

See the RAGFlow Roadmap 2026

🏄 Community

🙌 Contributing

RAGFlow flourishes via open-source collaboration. In this spirit, we embrace diverse contributions from the community. If you would like to be a part, review our Contribution Guidelines first.

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