新建一个js文件，搭建个服务，模拟相亲交友，代码如下：
javascript
const http = require('http');
// 内存模拟数据库
let users = [];
let likes = [];
let userIdAutoIncrement = 1;
const server = http.createServer((req, res) => {
// 通用响应头
res.setHeader('Access-Control-Allow-Origin', '*');
res.setHeader('Content-Type', 'application/json');
// -------------------------------------------------------------------------
// 1. POST 注册接口
// -------------------------------------------------------------------------
if (req.method === 'POST' && req.url === '/api/register') {
let data = '';
req.on('data', chunk => data += chunk);
req.on('end', () => {
try {
const body = JSON.parse(data);
const { username, password, nickname, gender, age, city } = body;
if (!username || !password) {
return res.end(JSON.stringify({ code: 400, msg: '账号密码不能为空' }));
}
// 检查是否已注册
const exists = users.find(u => u.username === username);
if (exists) {
return res.end(JSON.stringify({ code: 400, msg: '用户名已存在' }));
}
// 注册
const user = {
id: userIdAutoIncrement++,
username,
password,
nickname: nickname || '用户' + userIdAutoIncrement,
gender: gender || '未知',
age: age || 0,
city: city || '保密'
};
users.push(user);
res.end(JSON.stringify({
code: 200,
msg: '注册成功',
userId: user.id
}));
} catch (e) {
res.end(JSON.stringify({ code: 400, msg: '参数格式错误' }));
}
});
return;
}
// -------------------------------------------------------------------------
// 2. POST 登录接口
// -------------------------------------------------------------------------
if (req.method === 'POST' && req.url === '/api/login') {
let data = '';
req.on('data', chunk => data += chunk);
req.on('end', () => {
try {
const body = JSON.parse(data);
const { username, password } = body;
const user = users.find(u => u.username === username && u.password === password);
if (!user) {
return res.end(JSON.stringify({ code: 401, msg: '账号或密码错误' }));
}
res.end(JSON.stringify({
code: 200,
msg: '登录成功',
token: 'token-' + user.id,
userId: user.id
}));
} catch (e) {
res.end(JSON.stringify({ code: 400, msg: '参数错误' }));
}
});
return;
}
// -------------------------------------------------------------------------
// 3. GET 获取个人资料
// -------------------------------------------------------------------------
if (req.method === 'GET' && req.url.startsWith('/api/profile')) {
const url = new URL(req.url, 'http://localhost:3000');
const userId = url.searchParams.get('userId');
if (!userId) {
return res.end(JSON.stringify({ code: 400, msg: '缺少userId' }));
}
const user = users.find(u => u.id == userId);
if (!user) {
return res.end(JSON.stringify({ code: 404, msg: '用户不存在' }));
}
res.end(JSON.stringify({
code: 200,
data: {
id: user.id,
nickname: user.nickname,
gender: user.gender,
age: user.age,
city: user.city
}
}));
return;
}
// -------------------------------------------------------------------------
// 4. GET 查询异性推荐列表
// -------------------------------------------------------------------------
if (req.method === 'GET' && req.url.startsWith('/api/user/recommend')) {
const url = new URL(req.url, 'http://localhost:3000');
const gender = url.searchParams.get('gender'); // 想要看的性别：男/女
if (!gender) {
return res.end(JSON.stringify({ code: 400, msg: '请指定要查询的性别' }));
}
const list = users
.filter(u => u.gender === gender)
.map(u => ({
id: u.id,
nickname: u.nickname,
age: u.age,
city: u.city
}));
res.end(JSON.stringify({
code: 200,
count: list.length,
list: list
}));
return;
}
// -------------------------------------------------------------------------
// 5. POST 发送喜欢（打招呼）
// -------------------------------------------------------------------------
if (req.method === 'POST' && req.url === '/api/user/like') {
let data = '';
req.on('data', chunk => data += chunk);
req.on('end', () => {
try {
const body = JSON.parse(data);
const { fromUserId, toUserId } = body;
if (!fromUserId || !toUserId) {
return res.end(JSON.stringify({ code: 400, msg: '缺少参数' }));
}
if (fromUserId == toUserId) {
return res.end(JSON.stringify({ code: 400, msg: '不能喜欢自己' }));
}
const fromUser = users.find(u => u.id == fromUserId);
const toUser = users.find(u => u.id == toUserId);
if (!fromUser || !toUser) {
return res.end(JSON.stringify({ code: 404, msg: '用户不存在' }));
}
// 记录喜欢
likes.push({ fromUserId, toUserId, time: new Date() });
res.end(JSON.stringify({ code: 200, msg: `你已成功喜欢 ${toUser.nickname}` }));
} catch (e) {
res.end(JSON.stringify({ code: 400, msg: '参数错误' }));
}
});
return;
}
// 404
res.writeHead(404);
res.end(JSON.stringify({ code: 404, msg: '接口不存在' }));
});
// 启动日志（完全规范、无歧义、不暴露变量）
server.listen(3000, () => {
console.log('相亲交友接口服务已启动：http://localhost:3000');
console.log('');
console.log('POST 注册 /api/register');
console.log(' 参数：username, password, nickname, gender, age, city');
console.log('');
console.log(' POST 登录 /api/login');
console.log(' 参数：username, password');
console.log('');
console.log(' GET 个人资料 /api/profile?userId=xxx');
console.log('');
console.log(' GET 推荐异性 /api/user/recommend?gender=女');
console.log('');
console.log(' POST 发送喜欢 /api/user/like');
console.log(' 参数：fromUserId, toUserId');
console.log('龙能大能小，能升能隐；大则兴云吐雾，小则隐介藏形；升则飞腾于宇宙之间，隐则潜伏于波涛之内。方今春深，龙乘时变化，犹人得志而纵横四海。龙之为物，可比世之英雄。');
});运行：
ok. 先试试一个get请求，在浏览器输入：http://localhost:3000/api/user/recommend?gender=%E5%A5%B3
因为没人注册呢，所以没人。注册一个小龙女和一个杨过。
输入命令：
bash
curl -X POST http://localhost:3000/api/register -H "Content-Type: application/json" -d "{\"username\":\"xiaolongnv\",\"password\":\"123456\",\"nickname\":\"小龙女\",\"gender\":\"女\",\"age\":20,\"city\":\"终南山\"}"
bash
curl -X POST http://localhost:3000/api/register -H "Content-Type: application/json" -d "{\"username\":\"yangguo\",\"password\":\"123456\",\"nickname\":\"杨过\",\"gender\":\"男\",\"age\":22,\"city\":\"终南山\"}"运行如下：
ok, 再查询女性用户：
ok. 现在能查询到了。