perf 优化demo服务器
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from http.server import HTTPServer, BaseHTTPRequestHandler
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import sqlite3
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import json
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import threading
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import urllib
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from http.server import HTTPServer, BaseHTTPRequestHandler
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import urllib.parse
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# "数据库" 和线程锁保持不变
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WORKFLOWS_DB = {}
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db_lock = threading.Lock()
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# --- 配置 ---
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DATABASE_FILE = "workflows.sqlite"
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PORT = 8000
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class SimpleAPIHandler(BaseHTTPRequestHandler):
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# --- 数据库初始化 ---
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def init_db():
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"""初始化数据库，如果表不存在则创建它"""
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with sqlite3.connect(DATABASE_FILE) as conn:
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cursor = conn.cursor()
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cursor.execute("""
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CREATE TABLE IF NOT EXISTS workflows (
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name TEXT PRIMARY KEY,
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workflow_json TEXT NOT NULL
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)
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""")
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conn.commit()
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print(f"数据库 '{DATABASE_FILE}' 已准备就绪。")
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# --- API 处理器 ---
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class PersistentAPIHandler(BaseHTTPRequestHandler):
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def _send_cors_headers(self):
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"""发送CORS头部"""
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self.send_header('Access-Control-Allow-Origin', '*')
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self.send_header('Access-Control-Allow-Methods', 'GET, POST, DELETE, OPTIONS') # 添加 DELETE
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self.send_header('Access-Control-Allow-Methods', 'GET, POST, DELETE, OPTIONS')
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self.send_header("Access-Control-Allow-Headers", "X-Requested-With, Content-Type")
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def do_OPTIONS(self):
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"""处理预检请求"""
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self.send_response(200, "ok")
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self._send_cors_headers()
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self.end_headers()
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def do_GET(self):
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# ... (do_GET 保持不变) ...
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"""处理获取所有工作流的请求"""
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if self.path == '/api/workflow':
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self.send_response(200)
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self.send_header('Content-type', 'application/json')
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self._send_cors_headers()
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self.end_headers()
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with db_lock:
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response_data = list(WORKFLOWS_DB.values())
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self.wfile.write(json.dumps(response_data).encode())
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else:
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self.send_response(404)
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self.end_headers()
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self.wfile.write(b'Not Found')
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def do_POST(self):
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# ... (do_POST 保持不变) ...
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if self.path == '/api/workflow':
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content_length = int(self.headers['Content-Length'])
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post_data = self.rfile.read(content_length)
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try:
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data = json.loads(post_data)
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name = data.get('name')
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workflow_data = data.get('workflow')
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if not name or not workflow_data:
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raise ValueError("Missing 'name' or 'workflow' in request body")
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with db_lock:
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WORKFLOWS_DB[name] = {"name": name, "workflow": workflow_data}
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print(f"--- Received/Updated workflow: {name} ---")
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with sqlite3.connect(DATABASE_FILE) as conn:
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conn.row_factory = sqlite3.Row # 让查询结果可以像字典一样访问
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cursor = conn.cursor()
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cursor.execute("SELECT name, workflow_json FROM workflows")
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rows = cursor.fetchall()
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# 将数据库行转换为前端期望的JSON格式
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workflows_list = [
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{"name": row["name"], "workflow": json.loads(row["workflow_json"])}
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for row in rows
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]
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self.send_response(200)
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self.send_header('Content-type', 'application/json')
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self._send_cors_headers()
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self.end_headers()
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self.wfile.write(json.dumps({"status": "received", "name": name}).encode())
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except Exception as e:
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self.send_response(400);
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self.end_headers();
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self.wfile.write(f'Bad Request: {e}'.encode())
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else:
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self.send_response(404);
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self.end_headers();
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self.wfile.write(b'Not Found')
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self.wfile.write(json.dumps(workflows_list).encode())
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except Exception as e:
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self._send_error(f"获取工作流时出错: {e}")
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else:
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self._send_error("路径未找到", 404)
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def do_POST(self):
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"""处理发布/更新工作流的请求"""
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if self.path == '/api/workflow':
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try:
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content_length = int(self.headers['Content-Length'])
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post_data = self.rfile.read(content_length)
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data = json.loads(post_data)
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name = data.get('name')
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workflow_data = data.get('workflow')
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if not name or not workflow_data:
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return self._send_error("请求体中缺少 'name' 或 'workflow'", 400)
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workflow_json_str = json.dumps(workflow_data)
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with sqlite3.connect(DATABASE_FILE) as conn:
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cursor = conn.cursor()
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# 使用 INSERT OR REPLACE 来处理创建和更新，非常方便
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cursor.execute(
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"INSERT OR REPLACE INTO workflows (name, workflow_json) VALUES (?, ?)",
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(name, workflow_json_str)
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)
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conn.commit()
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print(f"--- 已保存/更新工作流: {name} ---")
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self.send_response(200)
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self.send_header('Content-type', 'application/json')
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self._send_cors_headers()
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self.end_headers()
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self.wfile.write(json.dumps({"status": "success", "name": name}).encode())
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except Exception as e:
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self._send_error(f"保存工作流时出错: {e}")
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else:
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self._send_error("路径未找到", 404)
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# --- [核心新增] 添加 do_DELETE 方法 ---
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def do_DELETE(self):
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"""处理删除指定工作流的请求"""
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# 我们期望的路径格式: /api/workflow/工作流名称[版本号]
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parts = self.path.split('/api/workflow/')
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if len(parts) == 2 and parts[1]:
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# URL解码工作流名称，因为它可能包含空格等特殊字符
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workflow_name_to_delete = urllib.parse.unquote(parts[1])
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try:
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with sqlite3.connect(DATABASE_FILE) as conn:
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cursor = conn.cursor()
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cursor.execute("DELETE FROM workflows WHERE name = ?", (workflow_name_to_delete,))
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conn.commit()
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with db_lock:
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if workflow_name_to_delete in WORKFLOWS_DB:
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del WORKFLOWS_DB[workflow_name_to_delete]
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print(f"--- Deleted workflow: {workflow_name_to_delete} ---")
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self.send_response(200)
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self.send_header('Content-type', 'application/json')
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self._send_cors_headers()
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self.end_headers()
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self.wfile.write(json.dumps({"status": "deleted", "name": workflow_name_to_delete}).encode())
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else:
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# 如果找不到要删除的工作流
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self.send_response(404)
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self._send_cors_headers()
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self.end_headers()
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self.wfile.write(json.dumps({"status": "error", "message": "Workflow not found"}).encode())
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# 检查是否真的有行被删除了
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if cursor.rowcount > 0:
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print(f"--- 已删除工作流: {workflow_name_to_delete} ---")
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self.send_response(200)
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self.send_header('Content-type', 'application/json')
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self._send_cors_headers()
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self.end_headers()
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self.wfile.write(json.dumps({"status": "deleted", "name": workflow_name_to_delete}).encode())
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else:
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self._send_error("工作流未找到，无法删除", 404)
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except Exception as e:
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self._send_error(f"删除工作流时出错: {e}")
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else:
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self.send_response(400)
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self._send_cors_headers()
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self.end_headers()
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self.wfile.write(b'Bad Request: Invalid delete path')
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self._send_error("无效的删除路径", 400)
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def _send_error(self, message, code=500):
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self.send_response(code)
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self.send_header('Content-type', 'application/json')
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self._send_cors_headers()
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self.end_headers()
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self.wfile.write(json.dumps({"status": "error", "message": message}).encode())
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def run(server_class=HTTPServer, handler_class=SimpleAPIHandler, port=8000):
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# --- 主执行函数 ---
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def run(server_class=HTTPServer, handler_class=PersistentAPIHandler, port=PORT):
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# 1. 初始化数据库
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init_db()
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# 2. 启动服务器
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server_address = ('', port)
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httpd = server_class(server_address, handler_class)
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print(f"测试API服务器已在 http://localhost:{port} 上启动...")
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print(" - POST /api/workflow: 发布新工作流")
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print(" - GET /api/workflow: 获取所有工作流")
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print(" - DELETE /api/workflow/<name>: 删除指定工作流")
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print(f"\n持久化API服务器已在 http://localhost:{port} 上启动...")
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print(f"数据库文件: ./{DATABASE_FILE}")
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print(" - POST /api/workflow -> 发布/更新工作流")
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print(" - GET /api/workflow -> 获取所有工作流")
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print(" - DELETE /api/workflow/<name> -> 删除指定工作流")
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print("\n按 Ctrl+C 停止服务器。")
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httpd.serve_forever()
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if __name__ == '__main__':
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run()
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run()
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