第35天-Flask文件上传全栈解决方案：从基础到企业级实践

一、基础文件上传实现

1.1 最小化上传示例

from flask import Flask, request
import os

app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = 'uploads'

@app.route('/upload', methods=['POST'])
def upload_file():
    if 'file' not in request.files:
        return 'No file part', 400
    
    file = request.files['file']
    if file.filename == '':
        return 'No selected file', 400
    
    if file:
        filename = secure_filename(file.filename)
        file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
        return 'File uploaded successfully', 200

1.2 前端表单示例

<form method="POST" enctype="multipart/form-data">
    <input type="file" name="file" accept=".pdf,.docx">
    <button type="submit">上传</button>
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