| 1 | # -*- coding: utf-8 -*- |
| 2 | """ |
| 3 | Qwen LLM API 客户端（DashScope Generation API） |
| 4 | 支持 qwen3.7-max、qwen3.6-max-preview、qwen3-max 等文本生成模型 |
| 5 | """ |
| 6 | |
| 7 | import os |
| 8 | import sys |
| 9 | |
| 10 | models_dir = os.path.dirname(os.path.abspath(__file__)) |
| 11 | backend_dir = os.path.dirname(models_dir) |
| 12 | if backend_dir not in sys.path: |
| 13 | sys.path.insert(0, backend_dir) |
| 14 | |
| 15 | import time |
| 16 | import logging |
| 17 | from typing import Optional |
| 18 | from config import Config |
| 19 | |
| 20 | logger = logging.getLogger(__name__) |
| 21 | |
| 22 | try: |
| 23 | import dashscope |
| 24 | from dashscope import Generation |
| 25 | except ImportError: |
| 26 | dashscope = None |
| 27 | Generation = None |
| 28 | |
| 29 | |
| 30 | class QwenLLM: |
| 31 | """ |
| 32 | Qwen LLM 客户端，使用 DashScope Generation API |
| 33 | 支持纯文本生成（可作为 LLM 使用） |
| 34 | """ |
| 35 | def __init__(self, api_key: Optional[str] = None, base_url: Optional[str] = None): |
| 36 | """ |
| 37 | :param api_key: DashScope API Key |
| 38 | :param base_url: DashScope API Base URL (可选) |
| 39 | """ |
| 40 | self.api_key = api_key or Config.DASHSCOPE_API_KEY |
| 41 | self.base_url = base_url or Config.DASHSCOPE_BASE_URL |
| 42 | |
| 43 | if not self.api_key: |
| 44 | logger.warning("DASHSCOPE_API_KEY is not set") |
| 45 | |
| 46 | if dashscope: |
| 47 | dashscope.api_key = self.api_key |
| 48 | # Do not override base_url to avoid "url error" if config contains wrong path |
| 49 | # if self.base_url: |
| 50 | # dashscope.base_http_api_url = self.base_url |
| 51 | |
| 52 | self.max_attempts = 3 |
| 53 | |
| 54 | def query(self, prompt: str, image_urls: list = None, model: str = "qwen-max", web_search: bool = False): |
| 55 | """ |
| 56 | Query Qwen model for text generation. |
| 57 | Note: This is for text-only LLM use. For image+text, use VLM client. |
| 58 | |
| 59 | :param prompt: Text prompt |
| 60 | :param image_urls: Ignored in this LLM implementation (use VLM for multimodal) |
| 61 | :param model: Model name (e.g., qwen3.7-max, qwen3.6-max-preview, qwen3-max) |
| 62 | :param web_search: If True, adds enable_search: True to API call |
| 63 | """ |
| 64 | if dashscope is None: |
| 65 | raise RuntimeError("dashscope package not installed. Run: pip install dashscope") |
| 66 | |
| 67 | if not model or "qwen3.5" in model: |
| 68 | # 兼容处理遗留的 qwen3.5 传参，避免 url error |
| 69 | if "max" in model: |
| 70 | model = "qwen-max" |
| 71 | elif "turbo" in model: |
| 72 | model = "qwen-turbo" |
| 73 | else: |
| 74 | model = "qwen-plus" |
| 75 | |
| 76 | |
| 77 | messages = [{"role": "system", "content": "You are a helpful assistant."}] |
| 78 | messages.append({"role": "user", "content": prompt}) |
| 79 | |
| 80 | attempts = 0 |
| 81 | while attempts < self.max_attempts: |
| 82 | try: |
| 83 | # Build request parameters |
| 84 | request_params = { |
| 85 | "model": model, |
| 86 | "messages": messages, |
| 87 | "result_format": "message", |
| 88 | "stream": False, |
| 89 | } |
| 90 | # Add web search if enabled |
| 91 | if web_search: |
| 92 | request_params["enable_search"] = True |
| 93 | |
| 94 | response = Generation.call(api_key=self.api_key, **request_params) |
| 95 | |
| 96 | if response.status_code == 200: |
| 97 | choice = response.output.choices[0] |
| 98 | if choice.message.content: |
| 99 | return choice.message.content |
| 100 | elif hasattr(choice.message, 'reasoning_content') and choice.message.reasoning_content: |
| 101 | return choice.message.reasoning_content |
| 102 | else: |
| 103 | logger.warning("Qwen returned an empty response; retrying") |
| 104 | time.sleep(2) |
| 105 | else: |
| 106 | error_msg = f"Qwen API error: {response.code} - {response.message}" |
| 107 | logger.error(error_msg) |
| 108 | raise RuntimeError(error_msg) |
| 109 | |
| 110 | except Exception as e: |
| 111 | logger.error(f"Error occurred with Qwen: {e}. Retrying.") |
| 112 | time.sleep(5) |
| 113 | |
| 114 | attempts += 1 |
| 115 | |
| 116 | raise Exception("Max attempts reached, failed to get a response from Qwen.") |
| 117 | |
| 118 | |
| 119 | if __name__ == "__main__": |
| 120 | import sys |
| 121 | sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) |
| 122 | from config import Config |
| 123 | |
| 124 | # 支持的模型列表 |
| 125 | |
| 126 | MODELS = ["qwen3.7-max", "qwen3.6-max-preview", "qwen3-max", "deepseek-v3.2"] |
| 127 | |
| 128 | print("=== DashScope LLM 可用性测试 ===") |
| 129 | api_key = Config.DASHSCOPE_API_KEY |
| 130 | if not api_key: |
| 131 | print("✗ DASHSCOPE_API_KEY 未设置，跳过") |
| 132 | sys.exit(1) |
| 133 | print(f" API Key: {api_key[:6]}***{api_key[-4:]}") |
| 134 | |
| 135 | client = QwenLLM(api_key=api_key) |
| 136 | prompt = "用一句话介绍你自己。" |
| 137 | print(f" Prompt: {prompt}") |
| 138 | |
| 139 | for model in MODELS: |
| 140 | print(f"\n--- 测试模型: {model} ---") |
| 141 | t0 = time.time() |
| 142 | try: |
| 143 | resp = client.query(prompt, model=model) |
| 144 | elapsed = time.time() - t0 |
| 145 | print(f"✓ 响应 ({elapsed:.1f}s): {resp.strip()[:200]}") |
| 146 | except Exception as e: |
| 147 | print(f"✗ 失败: {e}") |
| 148 |