<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Login Page</title></head><body><h2>Login</h2><form action="/login" method="post"><div><label for="username">Username:</label><input type="text" id="username" name="username" required></div><div><label for="password">Password:</label><input type="password" id="password" name="password" required></div><div><button type="submit">Login</button></div></form></body></html>后端用的c语言socket接受数据，我只实现了GET方法，请问POST发送的数据怎么接收并连接到数据库，怎么解析POST方法呢？
