Python中Flask路由参数处理的实战指南

from flask import Flask
app = Flask(__name__)

@app.route('/post/<int:post_id>')
def show_post(post_id):
    return f'显示文章ID：{post_id}'

from flask import Flask, request
app = Flask(__name__)

@app.route('/search')
def search():
    query = request.args.get('q', '')  # 获取参数q，默认为空字符串
    sort = request.args.get('sort', 'asc')  # 获取参数sort，默认为'asc'
    return f'搜索词：{query}, 排序方式：{sort}'

@app.route('/login', methods=['POST'])
def login():
    username = request.form.get('username')
    password = request.form.get('password')
    # 验证逻辑...
    return f'用户 {username} 登录成功'

@app.route('/api/data', methods=['POST'])
def receive_data():
    data = request.json
    if not data:
        return '无效的JSON数据', 400
    name = data.get('name')
    return f'收到数据：{name}'

from flask import Flask, request, render_template_string

app = Flask(__name__)

# 模拟用户数据
users = {1: 'Alice', 2: 'Bob'}

# 首页：显示用户列表（GET示例）
@app.route('/')
def index():
    user_list = ', '.join(users.values())
    return f'用户列表：{user_list}。访问 /user/<id> 查看详情，或使用 /search?name= 搜索。'

# 动态路由：根据ID获取用户
@app.route('/user/<int:user_id>')
def get_user(user_id):
    user = users.get(user_id, '未知用户')
    return f'用户ID {user_id}：{user}'

# GET查询参数：搜索用户
@app.route('/search')
def search_user():
    name = request.args.get('name', '').strip()
    if name:
        results = [uid for uid, uname in users.items() if name.lower() in uname.lower()]
        return f'搜索 "{name}" 结果：{results if results else "无匹配"}'
    return '请提供搜索参数，例如 /search?name=Alice'

# POST数据：添加新用户（模拟）
@app.route('/add_user', methods=['GET', 'POST'])
def add_user():
    if request.method == 'POST':
        user_id = request.form.get('id')
        user_name = request.form.get('name')
        if user_id and user_name:
            users[int(user_id)] = user_name
            return f'用户 {user_name} (ID: {user_id}) 添加成功！'
        return 'ID和名称不能为空'
    # GET请求时返回简单表单
    form_html = '''
        <form method="post">
            ID: <input type="number" name="id"><br>
            名称: <input type="text" name="name"><br>
            <input type="submit" value="添加">
        </form>
    '''
    return render_template_string(form_html)

if __name__ == '__main__':
    app.run(debug=True)