Flask formdata 上传多个文件

Flask 中 formdata 上传多个文件

在 Flask 中，我们可以使用 request.files 来获取上传的文件，当用户通过表单上传多个文件时，这些文件会以列表的形式存储在 request.files 中，下面是一个详细的教程，包括小标题和单元表格。

（图片来源网络，侵删）

准备工作

1、安装 Flask：确保已经安装了 Flask，如果没有安装，可以使用以下命令安装：

pip install Flask

2、创建一个简单的 HTML 表单，用于上传多个文件：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF8">
    <meta name="viewport" content="width=devicewidth, initialscale=1.0">
    <title>文件上传</title>
</head>
<body>
    <form action="/upload" method="POST" enctype="multipart/formdata">
        <input type="file" name="file1" multiple>
        <input type="file" name="file2" multiple>
        <button type="submit">上传</button>
    </form>
</body>
</html>

Flask 后端处理文件上传

1、创建一个简单的 Flask 应用：

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

2、定义一个路由，用于处理文件上传请求：

@app.route('/upload', methods=['POST'])
def upload_files():
    file1 = request.files['file1']  # 获取第一个文件对象列表
    file2 = request.files['file2']  # 获取第二个文件对象列表
    return 'Files uploaded successfully'

3、遍历文件对象列表，将文件保存到指定目录：

def save_files(file_list):
    for file in file_list:
        if file:  # 确保文件对象不为空
            filename = secure_filename(file.filename)  # 对文件名进行安全处理，防止包含非法字符
            file.save(os.path.join('uploads', filename))  # 将文件保存到 uploads 目录下

4、调用 save_files 函数，处理上传的文件：

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

完整代码示例

from flask import Flask, request, render_template_string, redirect, url_for, flash, send_from_directory, make_response, jsonify, session, g, render_template, escape, request, Response, stream_with_context, send_file, current_app as app, abort, jsonify, make_response, flash, redirect, url_for, render_template_string, send_from_directory, render_template_string, get_flashed_messages, after_request, before_request, request_started, url_for, get_current_url, request_method, request_args, get_jsonify, jsonify, request_context, has_request_context, request_started, url_for, get_current_url, request_method, request_args, get_jsonify, jsonify, request_context, has_request_context, request_started, url_for, get_current_url, request_method, request_args, get_jsonify, jsonify, request_context, has_request_context, request_started, url_for, get_current_url, request_method, request_args, get_jsonify, jsonify, request_context, has_request_context, request_started, url_for, get_current_url, request_method, request_args, get_jsonify, jsonify, request_context, has_request_context
from werkzeug.utils import secure_filename
import os
from flask import Flask, request, render_template_string
import os
app = Flask(__name__)
@app.route('/upload', methods=['POST'])
def upload_files():
    file1 = request.files['file1']  # 获取第一个文件对象列表
    file2 = request.files['file2']  # 获取第二个文件对象列表
    save_files(file1)  # 保存第一个文件列表中的文件到指定目录（如：uploads）
    save_files(file2)  # 保存第二个文件列表中的文件到指定目录（如：uploads）
    return 'Files uploaded successfully'
def save_files(file_list):
    for file in file_list:
        if file:  # 确保文件对象不为空
            filename = secure_filename(file.filename)  # 对文件名进行安全处理，防止包含非法字符
            file.save(os.path.join('uploads', filename))  # 将文件保存到 uploads 目录下if __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app.run(debug=True)else:passif __name__ == '__main__':app

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