| from flask import Flask, request, jsonify, render_template, Response |
| import os |
| from dotenv import load_dotenv |
| import json |
| import requests |
| from PIL import Image |
| import base64 |
| from io import BytesIO |
| import logging |
| import time |
|
|
| |
| load_dotenv() |
|
|
| app = Flask(__name__) |
| logging.basicConfig(level=logging.INFO) |
| logger = logging.getLogger(__name__) |
|
|
| def create_headers(): |
| """创建API请求头""" |
| return { |
| "Content-Type": "application/json", |
| "Authorization": f"Bearer {os.getenv('OPENAI_API_KEY')}" |
| } |
|
|
| def image_to_base64(image): |
| """将PIL图像转换为base64""" |
| buffered = BytesIO() |
| image.save(buffered, format="PNG") |
| return base64.b64encode(buffered.getvalue()).decode() |
|
|
| def process_image_with_vision(image_base64): |
| """使用Vision API处理图像""" |
| url = f"{os.getenv('OPENAI_API_BASE')}/v1/chat/completions" |
| |
| messages = [ |
| { |
| "role": "user", |
| "content": [ |
| { |
| "type": "text", |
| "text": """请仔细分析这张图片中的题目,要求: |
| |
| 1. 识别内容类型: |
| - 判断是否为数学题、物理题、化学题等 |
| - 识别是选择题、填空题还是解答题 |
| - 判断是否包含图表或特殊符号 |
| |
| 2. 内容提取: |
| - 提取所有文字内容,包括题干、选项(如果有) |
| - 识别所有数学公式、化学方程式或特殊符号 |
| - 保留原有的排版格式(如换行、缩进等) |
| |
| 3. 公式处理: |
| - 将所有数学公式转换为LaTeX格式 |
| - 使用[formula_n]作为占位符,其中n为公式编号 |
| - 保持公式的完整性和准确性 |
| |
| 请使用以下JSON格式返回: |
| { |
| "type": "题目类型(如:数学/物理/化学)", |
| "format": "题目格式(如:选择题/填空题/解答题)", |
| "text": "包含[formula_1], [formula_2]等占位符的完整文本", |
| "formulas": ["latex公式1", "latex公式2"], |
| "options": ["A. xxx", "B. xxx"] // 如果是选择题则包含此字段 |
| "notes": ["可能存在的问题说明1", "问题说明2"] |
| }""" |
| }, |
| { |
| "type": "image_url", |
| "image_url": { |
| "url": f"data:image/png;base64,{image_base64}" |
| } |
| } |
| ] |
| } |
| ] |
| |
| payload = { |
| "model": os.getenv('OPENAI_VISION_MODEL'), |
| "messages": messages, |
| "max_tokens": 1500, |
| "temperature": 0.2 |
| } |
| |
| try: |
| response = requests.post(url, headers=create_headers(), json=payload) |
| response.raise_for_status() |
| result = response.json() |
| |
| content = result['choices'][0]['message']['content'] |
| try: |
| return json.loads(content) |
| except json.JSONDecodeError: |
| return { |
| "type": "unknown", |
| "format": "unknown", |
| "text": content, |
| "formulas": [], |
| "notes": ["无法解析为JSON格式"] |
| } |
| |
| except Exception as e: |
| logger.error(f"Vision API调用错误: {str(e)}") |
| return {"error": str(e)} |
|
|
| def handle_sse_response(raw_data): |
| """处理SSE响应数据""" |
| if raw_data: |
| try: |
| data = json.loads(raw_data) |
| if len(data['choices']) > 0: |
| delta = data['choices'][0].get('delta', {}) |
| content = delta.get('content', '') |
| print(f"Stream content: {content}", flush=True) |
| return content |
| except json.JSONDecodeError: |
| pass |
| return '' |
|
|
| def stream_solve(problem_text, formulas): |
| url = f"{os.getenv('OPENAI_API_BASE')}/v1/chat/completions" |
| |
| full_problem = problem_text |
| for i, formula in enumerate(formulas, 1): |
| full_problem = full_problem.replace(f"[formula_{i}]", f"$${formula}$$") |
| |
| print(f"\n问题内容: {full_problem}") |
| |
| messages = [ |
| { |
| "role": "system", |
| "content": """请按照以下格式回答问题: |
| [开始解答] |
| 这是答案:(写出明确的答案,如"答案为:2.5米","答案选 A"等) |
| [解答结束] |
| |
| [开始解析] |
| 这是解析:(写出详细的解析过程,需严格遵循以下要求: |
| |
| 解题思路要求: |
| 1. 开篇明确指出题目涉及的核心知识点和解题方向 |
| 2. 采用合理的解题策略,并说明策略选择的依据 |
| 3. 对于多解法题目,说明最优解法的选择理由 |
| |
| 专业性要求: |
| 1. 严格使用规范的学科专业术语,避免口语化表达 |
| 2. 数学公式、物理量、化学方程式等必须符合学科规范 |
| 3. 计算步骤要详实,重要的中间步骤不得省略 |
| 4. 注意数据的有效位数,物理量单位的规范性 |
| |
| 逻辑性要求: |
| 1. 解题步骤要层次分明,逻辑推导严谨 |
| 2. 关键结论要有充分的推导过程和理论依据 |
| 3. 复杂问题应合理拆分为子步骤,循序渐进 |
| |
| 教学性要求: |
| 1. 对重要概念和关键步骤要适当添加解释说明 |
| 2. 特别标注解题中的难点和易错点 |
| 3. 适时补充相关的知识点拓展 |
| 4. 针对典型错误进行分析和提醒 |
| |
| 书写规范: |
| 1. 专业符号和公式要规范,确保清晰美观 |
| 2. 合理使用缩进和分段,突出层次结构 |
| 3. 保持语言的严谨性和专业性) |
| [解析结束]""" |
| }, |
| { |
| "role": "user", |
| "content": full_problem |
| } |
| ] |
| |
| payload = { |
| "model": os.getenv('OPENAI_CHAT_MODEL'), |
| "messages": messages, |
| "stream": True, |
| "temperature": 0.3 |
| } |
| |
| try: |
| response = requests.post( |
| url, |
| headers=create_headers(), |
| json=payload, |
| stream=True |
| ) |
| response.raise_for_status() |
|
|
| complete_response = "" |
| |
| for line in response.iter_lines(): |
| if not line or not line.startswith(b'data: '): |
| continue |
| |
| try: |
| data = json.loads(line[6:].decode('utf-8')) |
| content = data['choices'][0].get('delta', {}).get('content', '') |
| complete_response += content |
| |
| except json.JSONDecodeError: |
| continue |
| |
| except Exception as e: |
| print(f"\n错误: {str(e)}") |
| yield f"data: {json.dumps({'error': str(e)})}\n\n" |
| return |
|
|
| |
| try: |
| if '[开始解答]' in complete_response and '[开始解析]' in complete_response: |
| parts = complete_response.split('[开始解答]') |
| answer_part = parts[1].split('[解答结束]')[0].strip() |
| |
| parts = complete_response.split('[开始解析]') |
| analysis_part = parts[1].split('[解析结束]')[0].strip() |
| |
| |
| print("\n完整回答:") |
| print(f"答案: {answer_part}") |
| print(f"解析: {analysis_part}") |
| |
| |
| yield f"data: {json.dumps({'type': 'answer', 'content': answer_part})}\n\n" |
| yield f"data: {json.dumps({'type': 'analysis', 'content': analysis_part})}\n\n" |
| |
| else: |
| print("\n响应格式不符合预期") |
| yield f"data: {json.dumps({'error': '响应格式不符合预期'})}\n\n" |
| |
| except Exception as e: |
| print(f"\n解析错误: {str(e)}") |
| yield f"data: {json.dumps({'error': f'解析响应时出错: {str(e)}'})}\n\n" |
|
|
| @app.route('/') |
| def index(): |
| return render_template('index.html') |
|
|
| @app.route('/process', methods=['POST']) |
| def process(): |
| if 'file' not in request.files: |
| return jsonify({'error': '没有文件上传'}), 400 |
| |
| file = request.files['file'] |
| if file.filename == '': |
| return jsonify({'error': '没有选择文件'}), 400 |
| |
| try: |
| image = Image.open(file) |
| image_base64 = image_to_base64(image) |
| |
| result = process_image_with_vision(image_base64) |
| |
| if 'error' in result: |
| return jsonify({'error': result['error']}), 500 |
| |
| return jsonify({ |
| 'original_image': image_base64, |
| 'result': result |
| }) |
| |
| except Exception as e: |
| logger.error(f"处理图像错误: {str(e)}") |
| return jsonify({'error': str(e)}), 500 |
|
|
| @app.route('/solve', methods=['POST']) |
| def solve(): |
| data = request.json |
| if not data or 'text' not in data or 'formulas' not in data: |
| return jsonify({'error': '无效的请求数据'}), 400 |
| |
| return Response( |
| stream_solve(data['text'], data['formulas']), |
| content_type='text/event-stream' |
| ) |
|
|
| if __name__ == '__main__': |
| app.run(host='0.0.0.0', port=7860, debug=True) |