first commit

2024-07-03 03:02:24 +08:00 · 2024-07-03 03:02:24 +08:00 · 1760f36f7b
commit 1760f36f7b
15 changed files with 665 additions and 0 deletions
--- a/.env
+++ b/.env
@ -0,0 +1,4 @@
+AWS_ACCESS_KEY_ID=AKIAZQ3DT3KLI6N5LQUM
+AWS_SECRET_ACCESS_KEY=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
+AWS_REGION=ap-northeast-1
+S3_BUCKET_NAME=sure-ae-upload
--- a/.idea/.gitignore
+++ b/.idea/.gitignore
@ -0,0 +1,8 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
--- a/.idea/AWS-sure.iml
+++ b/.idea/AWS-sure.iml
@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/venv/lib/python3.10/site-packages" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@ -0,0 +1,23 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="DuplicatedCode" enabled="true" level="WEAK WARNING" enabled_by_default="true">
+      <Languages>
+        <language minSize="272" name="Python" />
+      </Languages>
+    </inspection_tool>
+    <inspection_tool class="PyPep8Inspection" enabled="true" level="WEAK WARNING" enabled_by_default="true">
+      <option name="ignoredErrors">
+        <list>
+          <option value="E265" />
+          <option value="E231" />
+          <option value="E262" />
+          <option value="E225" />
+          <option value="E402" />
+          <option value="E271" />
+          <option value="E302" />
+        </list>
+      </option>
+    </inspection_tool>
+  </profile>
+</component>
--- a/.idea/inspectionProfiles/profiles_settings.xml
+++ b/.idea/inspectionProfiles/profiles_settings.xml
@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.11 (AWS-sure)" project-jdk-type="Python SDK" />
+</project>
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/AWS-sure.iml" filepath="$PROJECT_DIR$/.idea/AWS-sure.iml" />
+    </modules>
+  </component>
+</project>
--- a/app.py
+++ b/app.py
@ -0,0 +1,182 @@
+from flask import Flask, request, jsonify, send_from_directory, make_response, send_file
+from flask_cors import CORS
+import boto3
+from botocore.exceptions import NoCredentialsError, ClientError, EndpointConnectionError
+import os
+from dotenv import load_dotenv
+import logging
+import datetime
+import pytz
+from botocore.client import Config
+import csv
+import pandas as pd
+
+# 配置日志
+logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')
+
+load_dotenv()  # 从.env文件加载环境变量
+
+app = Flask(__name__, static_url_path='', static_folder='.')
+CORS(app, resources={r"/*": {"origins": "*", "methods": "GET,POST,PUT,DELETE,OPTIONS"}})  # 添加 CORS 支持
+
+aws_access_key_id = os.getenv('AWS_ACCESS_KEY_ID')
+aws_secret_access_key = os.getenv('AWS_SECRET_ACCESS_KEY')
+region_name = os.getenv('AWS_REGION')
+bucket_name = os.getenv('S3_BUCKET_NAME')
+
+# 打印环境变量 (仅用于调试，生产环境中请移除)
+print(f"AWS_ACCESS_KEY_ID: {aws_access_key_id}")
+print(f"AWS_SECRET_ACCESS_KEY: {'*' * len(aws_secret_access_key) if aws_secret_access_key else 'Not set'}")
+print(f"AWS_REGION: {region_name}")
+print(f"S3_BUCKET_NAME: {bucket_name}")
+
+s3_client = boto3.client(
+    's3',
+    aws_access_key_id=aws_access_key_id,
+    aws_secret_access_key=aws_secret_access_key,
+    region_name=region_name,
+    config=Config(signature_version='s3v4')  # 使用 S3v4 签名版本
+)
+
+# 跟踪学生提交信息
+submissions_file = 'submissions.csv'
+
+# 创建或者加载提交文件
+if not os.path.exists(submissions_file):
+    with open(submissions_file, 'w', newline='') as file:
+        writer = csv.writer(file)
+        writer.writerow(['ID', '学生姓名', '学号', '提交的文件'])
+
+
+def add_submission(student, student_id, filename):
+    with open(submissions_file, 'a', newline='') as file:
+        writer = csv.writer(file)
+        writer.writerow([datetime.datetime.now().isoformat(), student, student_id, filename])
+
+
+def generate_presigned_url(object_key, content_type, expiration=3600):
+    try:
+        current_time = datetime.datetime.now(pytz.UTC)
+        logging.info(f"Current UTC time before generating URL: {current_time}")
+
+        response = s3_client.generate_presigned_url('put_object',
+                                                    Params={
+                                                        'Bucket': bucket_name,
+                                                        'Key': object_key,
+                                                        'ContentType': content_type  # 使用实际文件的 Content-Type
+                                                    },
+                                                    ExpiresIn=expiration,
+                                                    HttpMethod='PUT'
+                                                    )
+        logging.info(f"Generated presigned URL: {response}")
+        return response
+    except (NoCredentialsError, ClientError, EndpointConnectionError) as e:
+        logging.error(f"Error generating presigned URL: {str(e)}", exc_info=True)
+        return None
+
+
+@app.route('/generate-url', methods=['GET'])
+def get_presigned_url():
+    student = request.args.get('student')
+    student_id = request.args.get('student_id')
+    filename = request.args.get('filename')
+    content_type = request.args.get('content_type', 'application/octet-stream')
+    logging.info(
+        f"Received request for student: {student}, student_id: {student_id}, filename: {filename}, content_type: {content_type}")
+
+    if not student or not filename or not student_id:
+        logging.warning("Missing student, student_id or filename parameter")
+        return jsonify({'error': 'Student, student_id and filename parameters are required'}), 400
+
+    folder_name = 'sure_homework_define_by_qin'
+    object_key = f'{folder_name}/{student}-{filename}'
+
+    url = generate_presigned_url(object_key, content_type)  # 包含 content_type
+    if not url:
+        logging.error("Failed to generate presigned URL")
+        return jsonify({'error': 'Failed to generate presigned URL'}), 500
+
+    add_submission(student, student_id, filename)
+
+    logging.info(f"Generated URL: {url}")
+    return jsonify({'url': url, 'content_type': content_type})
+
+
+@app.route('/')
+def serve_index():
+    return send_from_directory('.', 'index.html')
+
+
+@app.route('/health')
+def health_check():
+    logging.info("Health check initiated")
+    try:
+        local_time = datetime.datetime.now()
+        utc_time = datetime.datetime.now(pytz.UTC)
+        logging.info(f"Local time: {local_time}, UTC time: {utc_time}")
+
+        logging.info("Attempting to list S3 buckets")
+        response = s3_client.list_buckets()
+        logging.info(f"Successfully listed buckets: {[bucket['Name'] for bucket in response['Buckets']]}")
+        return jsonify({
+            'status': 'healthy',
+            'message': 'AWS credentials are valid',
+            'local_time': local_time.isoformat(),
+            'utc_time': utc_time.isoformat()
+        }), 200
+    except NoCredentialsError:
+        logging.error("AWS credentials not found", exc_info=True)
+        return jsonify({'status': 'unhealthy', 'message': 'AWS credentials not found'}), 500
+    except ClientError as e:
+        error_code = e.response['Error']['Code']
+        error_message = e.response['Error']['Message']
+        logging.error(f"AWS client error: {error_code} - {error_message}", exc_info=True)
+        return jsonify({'status': 'unhealthy', 'message': f'AWS client error: {error_code} - {error_message}'}), 500
+    except Exception as e:
+        logging.error(f"Unexpected error during health check: {str(e)}", exc_info=True)
+        return jsonify({'status': 'unhealthy', 'message': f'Unexpected error: {str(e)}'}), 500
+
+
+@app.route('/download-submissions')
+def download_submissions():
+    df = pd.read_csv(submissions_file)
+    output_file = 'submissions.xlsx'
+    df.to_excel(output_file, index=False)
+    return send_file(output_file, as_attachment=True)
+
+
+@app.before_request
+def before_request_func():
+    if request.method == 'OPTIONS':
+        return _build_cors_preflight_response()
+
+
+def _build_cors_preflight_response():
+    response = make_response()
+    response.headers.add("Access-Control-Allow-Origin", "*")
+    response.headers.add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+    response.headers.add("Access-Control-Allow-Headers", "Content-Type")
+    return response
+
+
+if __name__ == '__main__':
+    local_time = datetime.datetime.now()
+    utc_time = datetime.datetime.now(pytz.UTC)
+    logging.info(f"Application starting. Local time: {local_time}, UTC time: {utc_time}")
+
+    try:
+        logging.info("Validating AWS credentials on startup")
+        sts = boto3.client('sts',
+                           aws_access_key_id=aws_access_key_id,
+                           aws_secret_access_key=aws_secret_access_key,
+                           region_name=region_name)
+        response = sts.get_caller_identity()
+        logging.info(f"AWS credentials validated successfully. Account ID: {response['Account']}")
+    except Exception as e:
+        logging.error(f"Failed to validate AWS credentials: {str(e)}", exc_info=True)
+        # 如果你想在凭证验证失败时退出程序，取消注释下面两行
+        # import sys
+        # sys.exit(1)
+
+    app.run(debug=True)
+
--- a/generate_presigned_url.py
+++ b/generate_presigned_url.py
@ -0,0 +1,31 @@
+import boto3
+from botocore.exceptions import NoCredentialsError, ClientError
+
+# 使用获取的访问密钥ID和秘密访问密钥来初始化S3客户端
+aws_access_key_id = 'AKIAZQ3DT3KLN5WGXZOR'          # 替换为你的访问密钥ID
+aws_secret_access_key = '5UZb8SovTrbroT7yU1pBzaR5myLn+NMA+c87RvLH'  # 替换为你的秘密访问密钥
+region_name = 'ap-northeast-1'                       # 替换为你的S3存储桶所在区域
+
+s3_client = boto3.client(
+    's3',
+    aws_access_key_id=aws_access_key_id,
+    aws_secret_access_key=aws_secret_access_key,
+    region_name=region_name
+)
+
+# 创建一个模拟“文件夹”的空对象
+def create_s3_folder(bucket_name, folder_name):
+    try:
+        s3_client.put_object(Bucket=bucket_name, Key=(folder_name + '/'))
+        print(f"Folder {folder_name} created in bucket {bucket_name}")
+    except NoCredentialsError:
+        print("Credentials not available")
+    except ClientError as e:
+        print(f"Error: {e}")
+
+# Bucket name and folder name
+bucket_name = 'sure-ae-upload'
+folder_name = 'sure_homework_define_by_qin'
+
+# Create folder
+create_s3_folder(bucket_name, folder_name)
--- a/image.jpg
+++ b/image.jpg
--- a/index.html
+++ b/index.html
@ -0,0 +1,316 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>秀儿文件提交系统</title>
+    <style>
+        body {
+            font-family: 'Helvetica Neue', Arial, sans-serif;
+            background-color: #f0f2f5;
+            margin: 0;
+            padding: 0;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            min-height: 100vh;
+        }
+        .container {
+            background-color: #ffffff;
+            border-radius: 8px;
+            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+            padding: 30px;
+            width: 100%;
+            max-width: 400px;
+        }
+        .image-container {
+            margin-bottom: 20px;
+            border-radius: 8px;
+            overflow: hidden;
+        }
+        .image-container img {
+            width: 100%;
+            height: auto;
+            display: block;
+        }
+        h1 {
+            color: #333;
+            font-size: 24px;
+            margin-bottom: 20px;
+            text-align: center;
+        }
+        .form-field {
+            margin-bottom: 20px;
+        }
+        label {
+            display: block;
+            margin-bottom: 5px;
+            color: #555;
+            font-weight: 500;
+        }
+        input[type="text"] {
+            width: 100%;
+            padding: 10px;
+            border: 1px solid #ddd;
+            border-radius: 4px;
+            font-size: 16px;
+        }
+        .file-input-wrapper {
+            position: relative;
+            overflow: visible;
+            display: inline-block;
+            width: 100%;
+        }
+        .file-input-button {
+            background-color: #f0f0f0;
+            border: 1px solid #ddd;
+            color: #333;
+            padding: 10px 15px;
+            border-radius: 4px;
+            font-size: 16px;
+            cursor: pointer;
+            display: inline-block;
+            width: 100%;
+            text-align: center;
+            box-sizing: border-box;
+            transition: background-color 0.3s, border-color 0.3s;
+        }
+        .file-input-button:hover {
+            background-color: #e0e0e0;
+            border-color: #ccc;
+        }
+        .file-input-button input[type=file] {
+            font-size: 100px;
+            position: absolute;
+            left: 0;
+            top: 0;
+            opacity: 0;
+            cursor: pointer;
+            width: 100%;
+            height: 100%;
+        }
+        #file-name {
+            margin-top: 5px;
+            font-size: 14px;
+            color: #666;
+        }
+        button[type="submit"] {
+            background-color: #1890ff;
+            color: white;
+            border: none;
+            padding: 12px 20px;
+            border-radius: 4px;
+            font-size: 16px;
+            cursor: pointer;
+            width: 100%;
+            transition: background-color 0.3s;
+        }
+        button[type="submit"]:hover {
+            background-color: #40a9ff;
+        }
+        .progress-container {
+            margin-top: 20px;
+            display: none;
+        }
+        .progress {
+            height: 10px;
+            background-color: #f0f0f0;
+            border-radius: 5px;
+            overflow: hidden;
+        }
+        .progress-bar {
+            height: 100%;
+            background-color: #1890ff;
+            width: 0;
+            transition: width 0.3s ease;
+        }
+        #progress-percentage {
+            font-size: 14px;
+            color: #666;
+            margin-top: 5px;
+        }
+        #status {
+            margin-top: 15px;
+            font-size: 14px;
+            color: #666;
+        }
+        #download-link {
+            display: inline-block;
+            margin-top: 20px;
+            text-decoration: none;
+            color: #1890ff;
+            font-size: 14px;
+        }
+        .upload-stats {
+            margin-top: 10px;
+            font-size: 14px;
+            color: #666;
+        }
+        .upload-stats span {
+            display: inline-block;
+            margin-right: 15px;
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="image-container">
+            <img src="image.jpg" alt="描述性文本">
+        </div>
+        <h1>秀儿文件提交系统</h1>
+        <form id="upload-form">
+            <div class="form-field">
+                <label for="student">学生姓名:</label>
+                <input type="text" id="student" name="student" required>
+            </div>
+            <div class="form-field">
+                <label for="student-id">学号:</label>
+                <input type="text" id="student-id" name="student-id" required>
+            </div>
+            <div class="form-field">
+                <label for="file">选择文件:</label>
+                <div class="file-input-wrapper">
+                    <div class="file-input-button">
+                        选择文件
+                        <input type="file" id="file" name="file" required>
+                    </div>
+                </div>
+                <div id="file-name">未选择文件</div>
+            </div>
+            <button type="submit">提交 (截止日期: 2024.07.03)</button>
+        </form>
+        <div id="status"></div>
+        <div class="progress-container" id="progress-container">
+            <div class="progress">
+                <div class="progress-bar" id="progress-bar"></div>
+            </div>
+            <div id="progress-percentage">0%</div>
+            <div class="upload-stats">
+                <span id="upload-speed">速度: 0 KB/s</span>
+                <span id="upload-size">0 KB / 0 KB</span>
+                <span id="upload-time">剩余时间: 计算中</span>
+            </div>
+        </div>
+        <a href="/download-submissions" id="download-link">下载统计表格</a>
+    </div>
+
+    <script>
+        document.getElementById('upload-form').addEventListener('submit', async (e) => {
+    e.preventDefault();
+
+    const student = document.getElementById('student').value;
+    const studentId = document.getElementById('student-id').value;
+    const file = document.getElementById('file').files[0];
+    const statusDiv = document.getElementById('status');
+    const progressContainer = document.getElementById('progress-container');
+    const progressBar = document.getElementById('progress-bar');
+    const progressPercentage = document.getElementById('progress-percentage');
+    const uploadSpeed = document.getElementById('upload-speed');
+    const uploadSize = document.getElementById('upload-size');
+    const uploadTime = document.getElementById('upload-time');
+
+    if (!student || !studentId || !file) {
+        alert('请提供学生姓名、学号，并选择一个文件。');
+        return;
+    }
+
+    statusDiv.textContent = '准备上传...';
+    progressContainer.style.display = 'block';
+
+    try {
+        const response = await fetch(`/generate-url?student=${encodeURIComponent(student)}&student_id=${encodeURIComponent(studentId)}&filename=${encodeURIComponent(file.name)}&content_type=${encodeURIComponent(file.type)}`, {
+            method: 'GET',
+        });
+
+        if (!response.ok) {
+            const errorData = await response.json();
+            throw new Error(`生成预签名URL失败: ${errorData.error}`);
+        }
+        const data = await response.json();
+
+        if (!data.url) {
+            throw new Error('服务器未返回URL');
+        }
+
+        statusDiv.textContent = '正在上传文件...';
+
+        const totalSize = file.size;
+        let uploadedSize = 0;
+        let startTime = Date.now();
+
+        const updateProgress = (additionalProgress = 0) => {
+            uploadedSize += additionalProgress;
+            const percentComplete = (uploadedSize / totalSize) * 100;
+            const elapsedTime = (Date.now() - startTime) / 1000; // 秒
+            const speed = uploadedSize / elapsedTime;
+            const remainingSize = totalSize - uploadedSize;
+            const estimatedRemainingTime = speed > 0 ? remainingSize / speed : 0;
+
+            progressBar.style.width = percentComplete + '%';
+            progressPercentage.textContent = percentComplete.toFixed(2) + '%';
+            uploadSpeed.textContent = `速度: ${formatSize(speed)}/s`;
+            uploadSize.textContent = `${formatSize(uploadedSize)} / ${formatSize(totalSize)}`;
+            uploadTime.textContent = `剩余时间: ${formatTime(estimatedRemainingTime)}`;
+        };
+
+        // 模拟进度更新
+        const progressInterval = setInterval(() => {
+            if (uploadedSize < totalSize) {
+                updateProgress(totalSize / 100); // 每次更新1%的进度
+            }
+        }, 200);
+
+        // 实际上传
+        const uploadResponse = await fetch(data.url, {
+            method: 'PUT',
+            body: file,
+            headers: {
+                'Content-Type': data.content_type
+            }
+        });
+
+        clearInterval(progressInterval);
+
+        if (!uploadResponse.ok) {
+            throw new Error(`Upload failed: ${uploadResponse.statusText}`);
+        }
+
+        // 确保进度达到100%
+        updateProgress(totalSize - uploadedSize);
+
+        statusDiv.textContent = '文件上传成功';
+        alert('文件上传成功');
+
+    } catch (error) {
+        console.error('错误:', error);
+        statusDiv.textContent = `错误: ${error.message}`;
+        alert('发生错误: ' + error.message);
+    }
+});
+
+function formatSize(bytes) {
+    if (bytes === 0) return '0 Bytes';
+    const k = 1024;
+    const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB'];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
+}
+
+function formatTime(seconds) {
+    if (isNaN(seconds) || !isFinite(seconds)) {
+        return '计算中';
+    }
+    if (seconds < 60) return Math.round(seconds) + ' 秒';
+    const minutes = Math.floor(seconds / 60);
+    const remainingSeconds = Math.round(seconds % 60);
+    return `${minutes} 分 ${remainingSeconds} 秒`;
+}
+
+// 添加文件名显示功能
+document.getElementById('file').addEventListener('change', function(e) {
+    const fileName = e.target.files[0] ? e.target.files[0].name : '未选择文件';
+    document.getElementById('file-name').textContent = fileName;
+});
+    </script>
+</body>
+</html>
--- a/main.py
+++ b/main.py
@ -0,0 +1,16 @@
+# 这是一个示例 Python 脚本。
+
+# 按 ⌃R 执行或将其替换为您的代码。
+# 按 双击 ⇧ 在所有地方搜索类、文件、工具窗口、操作和设置。
+
+
+def print_hi(name):
+    # 在下面的代码行中使用断点来调试脚本。
+    print(f'Hi, {name}')  # 按 ⌘F8 切换断点。
+
+
+# 按间距中的绿色按钮以运行脚本。
+if __name__ == '__main__':
+    print_hi('PyCharm')
+
+# 访问 https://www.jetbrains.com/help/pycharm/ 获取 PyCharm 帮助
--- a/submissions.csv
+++ b/submissions.csv
@ -0,0 +1,13 @@
+ID,学生姓名,学号,提交的文件
+2024-07-02T15:38:06.844568,嗷呜呜汪汪汪钦,12345,fastgpt.txt
+2024-07-03T02:01:37.364487,王中王火腿肠,123,mao.png
+2024-07-03T02:02:02.087326,王中王火腿肠,123,《移动互联开发》软件设计考查材料.rar
+2024-07-03T02:31:23.019179,秀儿,000,SUS 304 Stainless Steel.png
+2024-07-03T02:31:55.184382,秀儿,000,阅读1.pdf
+2024-07-03T02:35:50.030507,嘿！,324,计算机网络_数据链路层.ppt
+2024-07-03T02:37:23.232007,CC,34534,"性学观止 (贺兰特·凯查杜里安, 胡颖翀) (Z-Library).pdf"
+2024-07-03T02:40:42.161975,4324,4234,数学分析 陈纪修 第三版 上 by 陈纪修，于崇华，金路 (z-lib.org).pdf
+2024-07-03T02:42:47.614487,324,4234,男人来自火星，女人来自金星（套装共4册） (约翰·格雷) (Z-Library).pdf
+2024-07-03T02:43:01.033652,534534,543534,数学分析 陈纪修 第三版 上 by 陈纪修，于崇华，金路 (z-lib.org).pdf
+2024-07-03T02:46:15.397526,CCC,AAA,"周易译注 (黄寿祺,张善文) (Z-Library).pdf"
+2024-07-03T02:48:26.189052,2423,423423,阅读1.pdf
--- a/submissions.xlsx
+++ b/submissions.xlsx
--- a/upload_homework.py
+++ b/upload_homework.py
@ -0,0 +1,44 @@
+import boto3
+from botocore.exceptions import NoCredentialsError
+
+# 使用访问密钥ID和秘密访问密钥来初始化S3客户端
+aws_access_key_id = 'AKIAZQ3DT3KLN5WGXZOR'  # 替换为你的访问密钥ID
+aws_secret_access_key = '5UZb8SovTrbroT7yU1pBzaR5myLn+NMA+c87RvLH'  # 替换为你的秘密访问密钥
+region_name = 'ap-northeast-1'  # 替换为你的S3存储桶所在区域
+
+s3_client = boto3.client(
+    's3',
+    aws_access_key_id=aws_access_key_id,
+    aws_secret_access_key=aws_secret_access_key,
+    region_name=region_name
+)
+
+
+def generate_presigned_url(bucket_name, object_key, expiration=3600):
+    try:
+        response = s3_client.generate_presigned_url(
+            'put_object',
+            Params={
+                'Bucket': bucket_name,
+                'Key': object_key,
+                'ContentType': 'application/pdf'  # 设置Content-Type
+            },
+            ExpiresIn=expiration
+        )
+    except NoCredentialsError:
+        print("Credentials not available")
+        return None
+    return response
+
+
+# 生成每个学生的上传预签名URL
+bucket_name = 'sure-ae-upload'
+folder_name = 'sure_homework_define_by_qin'
+students = ['alice', 'bob', 'charlie']  # 示例学生名单
+
+for student in students:
+    object_key = f'{folder_name}/{student}-assignment.pdf'  # 动态生成路径
+    url = generate_presigned_url(bucket_name, object_key)
+
+    if url:
+        print(f"The presigned URL for {student} is: {url}")