嗨,我想下载一个zip文件,然后在下载完成后删除它
@app.route('/download',methods=['GET', 'POST'])
def download():
projectTitle = request.args.get('projectTitle')
file_path = projectTitle+".zip"
@after_this_request
def remove_file(response):
print("After this request...")
os.remove(file_path)
return response
return send_file(file_path,
mimetype='application/zip',
attachment_filename=file_path,
as_attachment=True)
我使用javascript将此端点称为:
function downloadURI(uri)
{
var link = document.createElement("a");
link.href = uri;
link.target = "_blank";
link.click();
}
downloadURI("download?projectTitle="+title);
zip文件从未被删除,我缺少什么?
编辑:我进行了一些调试,发现出现以下错误:
After this request...
After this request...
[2020-07-10 13:00:40,653] ERROR in app: Exception on /download [GET]
Traceback (most recent call last):
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 1953, in full_dispatch_request
return self.finalize_request(rv)
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 1970, in finalize_request
response = self.process_response(response)
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 2267, in process_response
response = handler(response)
File "C:/Users/ceccolig/PycharmProjects/SingleBP/app.py", line 39, in remove_file
os.remove(file_path)
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'DemoTMD-prod.zip'
[2020-07-10 13:00:40,656] ERROR in app: Request finalizing failed with an error while handling an error
Traceback (most recent call last):
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 1953, in full_dispatch_request
return self.finalize_request(rv)
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 1970, in finalize_request
response = self.process_response(response)
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 2267, in process_response
response = handler(response)
File "C:/Users/ceccolig/PycharmProjects/SingleBP/app.py", line 39, in remove_file
os.remove(file_path)
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'DemoTMD-prod.zip'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 1970, in finalize_request
response = self.process_response(response)
File "C:\Users\ceccolig\PycharmProjects\SingleBP\venv\lib\site-packages\flask\app.py", line 2267, in process_response
response = handler(response)
File "C:/Users/ceccolig/PycharmProjects/SingleBP/app.py", line 39, in remove_file
os.remove(file_path)
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'DemoTMD-prod.zip'
127.0.0.1 - - [10/Jul/2020 13:00:40] "GET /download?projectTitle=DemoTMD-prod HTTP/1.1" 500 -
正如您所看到的@after_这个请求被调用了两次(我不知道为什么),实际上“after this request”被打印了两次
如您所见,当调用
@after_this_request
修饰方法时,此请求生命尚未结束,客户端仍在等待响应,因此文件仍在打开,或者您可以说它正在使用,因此无法删除该文件这就是我的解决方案。就像:
在api中,您可以发布此任务,如下所示:
我不知道如何对别人说
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