上传二进制文件(Dicom文件)到flask服务器，同时使用javascript接收JSON响应

<form id="uploadForm">
  <input type="file" id="fileInput" name="dicomFile">
  <button type="submit">上传</button>
</form>
<div id="progressBar"></div>

const form = document.getElementById('uploadForm');
const fileInput = document.getElementById('fileInput');
const progressBar = document.getElementById('progressBar');

form.addEventListener('submit', (e) => {
  e.preventDefault();
  
  const file = fileInput.files[0];
  const formData = new FormData();
  formData.append('dicomFile', file);
  
  const xhr = new XMLHttpRequest();
  xhr.open('POST', '/upload', true);
  
  xhr.upload.addEventListener('progress', (event) => {
    if (event.lengthComputable) {
      const percent = (event.loaded / event.total) * 100;
      progressBar.style.width = percent + '%';
    }
  });
  
  xhr.onreadystatechange = () => {
    if (xhr.readyState === XMLHttpRequest.DONE) {
      if (xhr.status === 200) {
        const response = JSON.parse(xhr.responseText);
        // 处理JSON响应数据
      } else {
        // 处理错误情况
      }
    }
  };
  
  xhr.send(formData);
});

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/upload', methods=['POST'])
def upload():
    dicom_file = request.files['dicomFile']
    # 处理上传的Dicom文件
    
    # 构建JSON响应数据
    response_data = {
        'status': 'success',
        'message': '文件上传成功',
        'data': {
            'file_name': dicom_file.filename,
            'file_size': dicom_file.content_length,
            # 其他处理结果
        }
    }
    
    return jsonify(response_data)

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