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FastAPI server that proxies OpenAI API endpoints using hexin_engine backend

Project description

Hexin Proxy Server

一个 FastAPI 服务器,提供 OpenAIAnthropic 兼容的 API 接口,通过代理 Hexin 后端服务来提供 AI 功能。

功能特性

  • Chat Completions API: 兼容 OpenAI 的聊天完成接口
  • Claude Messages API: 兼容 Anthropic Messages API,支持 Claude Code 和 Anthropic SDK
  • Responses API: 兼容 OpenAI 的推理响应接口 (支持 o3、o4-mini)
  • Embeddings API: 兼容 OpenAI 的文本嵌入接口
  • 模型列表: 支持列出可用的 AI 模型
  • 流式响应: 支持实时流式聊天响应和推理响应
  • 多模型支持: 支持多种大语言模型和嵌入模型

支持的接口

Chat Completions (OpenAI 格式)

  • POST /v1/chat/completions - 创建聊天完成
  • 支持流式和非流式响应
  • 支持工具调用和函数调用
  • 支持多种模型:GPT、Claude、Gemini、DeepSeek 等
  • 默认端口: 8777

Claude Messages API (Anthropic 格式)

  • POST /v1/messages - 创建消息(完全兼容 Anthropic SDK)
  • 支持流式和非流式响应
  • 支持多轮对话和 system 提示词
  • 可直接与 Claude CodeAnthropic SDK 集成
  • 默认端口: 8777
  • 📖 详细文档

Responses (推理响应)

  • POST /v1/responses - 创建推理响应 (专为 o3、o4-mini 等推理模型设计)
  • 支持流式和非流式响应
  • 支持推理配置 (effort: low/medium/high, summary: brief/detailed)
  • 返回详细的推理过程和结果

Embeddings

  • POST /v1/embeddings - 创建文本嵌入
  • 支持的模型:text-embedding-ada-002, text-embedding-3-small, text-embedding-3-large
  • 支持单个和批量文本处理

Models

  • GET /v1/models - 列出可用模型
  • 返回聊天、推理和嵌入模型列表

快速开始

1. 安装依赖

pip install hexin-server --upgrade

或者本地安装

git clone https://github.com/LinXueyuanStdio/hexin-proxy-server.git
cd hexin-proxy-server
pip install -e .

2. 配置环境变量

cp .env.example .env

创建 .env 文件:

HITHINK_APP_ID=your_app_id
HITHINK_APP_SECRET=your_app_secret
HITHINK_APP_URL=your_app_url

3. 启动服务器

OpenAI 兼容服务器(默认端口 8777)

# 直接运行
python -m hexin_server

# 或者指定参数
python -m hexin_server --host 0.0.0.0 --port 8777 --reload

4. 测试接口

Chat Completions 示例(OpenAI 格式)

curl -X POST "http://localhost:8777/v1/chat/completions" \
  -H "Authorization: Bearer sk-fastapi-proxy-key-12345" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-4o",
    "messages": [
      {"role": "user", "content": "Hello, how are you?"}
    ]
  }'

Claude Messages 示例(Anthropic 格式)

curl -X POST "http://localhost:8777/v1/messages" \
  -H "x-api-key: sk-fastapi-proxy-key-12345" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-3-sonnet-20240229",
    "max_tokens": 1024,
    "messages": [
      {"role": "user", "content": "你好,请介绍一下你自己"}
    ]
  }'

Responses 推理示例

# 非流式推理响应
curl -X POST "http://localhost:8777/v1/responses" \
  -H "Authorization: Bearer sk-fastapi-proxy-key-12345" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "o3",
    "input": "估算下海水的总重量",
    "reasoning": {
      "effort": "medium",
      "summary": "detailed"
    }
  }'

# 流式推理响应
curl -X POST "http://localhost:8777/v1/responses" \
  -H "Authorization: Bearer sk-fastapi-proxy-key-12345" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "o3",
    "input": "估算下海水的总重量",
    "reasoning": {
      "effort": "medium",
      "summary": "detailed"
    },
    "stream": true
  }'

Embeddings 示例

curl -X POST "http://localhost:8777/v1/embeddings" \
  -H "Authorization: Bearer sk-fastapi-proxy-key-12345" \
  -H "Content-Type: application/json" \
  -d '{
    "input": "Hello, world!",
    "model": "text-embedding-ada-002"
  }'

使用 OpenAI 和 Anthropic 客户端库

OpenAI 格式 API

import openai

# 配置客户端
client = openai.OpenAI(
    api_key="sk-fastapi-proxy-key-12345",
    base_url="http://localhost:8777/v1"
)

# 聊天完成
response = client.chat.completions.create(
    model="gpt-4o",
    messages=[
        {"role": "user", "content": "Hello, how are you?"}
    ]
)

# 创建嵌入
embeddings = client.embeddings.create(
    model="text-embedding-ada-002",
    input="Hello, world!"
)

Anthropic Messages API

from anthropic import Anthropic

# 配置客户端
client = Anthropic(
    base_url="http://localhost:8777",
    api_key="sk-fastapi-proxy-key-12345",
)

# 创建消息
message = client.messages.create(
    model="claude-3-sonnet-20240229",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "你好,请介绍一下你自己。"}
    ]
)

print(message.content[0].text)

# 流式响应
with client.messages.stream(
    model="claude-3-sonnet-20240229",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "讲一个故事"}
    ]
) as stream:
    for text in stream.text_stream:
        print(text, end="", flush=True)

推理响应 API

推理响应需要使用 requests 库,因为 OpenAI 客户端暂不支持 responses API:

import requests

response = requests.post(
    "http://localhost:8777/v1/responses",
    headers={
        "Authorization": "Bearer sk-fastapi-proxy-key-12345",
        "Content-Type": "application/json"
    },
    json={
        "model": "o3",
        "input": "估算下海水的总重量",
        "reasoning": {
            "effort": "medium",
            "summary": "detailed"
        }
    }
)

详细文档

项目结构

hexin-proxy-server/
├── hexin_server/
│   ├── __init__.py
│   └── __main__.py          # 统一服务器 (端口 8777,支持 OpenAI 和 Anthropic API)
├── tests/
│   ├── test_embedding.py    # 嵌入接口测试
│   └── test_anthropic_sdk.py # Anthropic SDK 测试
├── CLAUDE_MESSAGES_API.md   # Claude API 使用指南
├── RESPONSES_API.md         # 推理 API 使用指南
├── EMBEDDING_API.md         # 嵌入 API 使用指南
├── README.md                # 项目总览
├── pyproject.toml           # 项目配置
└── .env.example             # 环境变量示例

测试

项目包含多种测试脚本来验证功能:

# 测试嵌入接口
python tests/test_embedding.py

# 测试 Anthropic SDK(Claude Messages API)
python tests/test_anthropic_sdk.py

所有测试都使用统一的 8777 端口服务器。

健康检查

检查服务器状态:

curl http://localhost:8777/health

响应:

{
  "status": "healthy",
  "authenticated": true
}

贡献

欢迎提交 Issue 和 Pull Request!

许可证

License file

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