docs: 2026-04-14作业

2026-04-14/2026-04-14_hw_2.py

@@ -0,0 +1,26 @@
+from flask import Flask, url_for, request, redirect, session
+
+app = Flask(__name__)
+app.secret_key = 'Your_secret_key$^52@!'
+
+@app.route('/index')
+def index():
+    if 'username' in session:
+        return f'你好，{session.get("username")}'
+    return redirect(url_for("login"))
+
+@app.route('/login', methods=['GET', 'POST'])
+def login():
+    if request.method == 'POST':
+        session['username'] = request.form['username']
+        return redirect(url_for('index'))
+    # 当发送GET请求时，页面显示输入框和"登录"按钮
+    return '''
+    <form method="post">
+        <p><input type=text name=username>
+        <p><input type=submit value=登录>
+    </form>
+    '''
+
+if __name__ == '__main__':
+    app.run()