Posted in Javascript onMay 10, 2019
•axios 接受文件流,需要设置 {responseType:'arraybuffer'}
axios.post( apiUrl, formdata, {responseType:'arraybuffer'} ).then(res=> { if (res.status === 200) { let blob = new Blob([res.data], { type: res.headers['content-type'] }); const fileName = res.headers['content-disposition']; const title = fileName && (fileName.indexOf('filename=') !== -1) ? fileName.split('=')[1] : 'download'; require('script-loader!file-saver'); saveAs(blob, title); } }) .catch();
注: axios 中 response 表示服务器响应的数据类型,可以是 arraybuffer , blob, document , json , text , stream . 默认为: json
•后端发送文件:Python
from flask import send_from_directory @admin_bp.route('/tasksothers/download', methods=["GET", "POST"]) @auth.login_required def api_tasksothers_download(): root_path = '' src_name = "a.sql" upload_path = os.path.join(root_path, src_name) print("upload_path =", upload_path) if os.path.isfile(upload_path): response = send_from_directory(root_path, src_name, as_attachment=True) print("response: ",response) response.headers["Access-Control-Expose-Headers"] = "Content-disposition" print("response: ", response.headers) return response
注: 如果 response.header 中没有添加 Access-Control-Expose-Headers 这个参数(代表:服务器允许浏览器访问的头(headers)的白名单),vue中就无法获取 content-disposition,即 res.headers['content-disposition'];无法找到
总结
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vue element中axios下载文件(后端Python)
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