Question

我正在使用CS50 IDE用Flask开发一个Web应用程序。我希望用户上传带有表单的文件。但是，提交表单后，无论是否未选择文件，我都会收到“ 500 Internal Server Error ”。

如果选择了文件，则控制台中没有错误日志。

如果选择否文件，则存在以下错误日志：

import psutil
import time

ini = 'start'

def getTaskList():
    list_of_ran_proccesses = []
    for procs in psutil.process_iter():
        list_of_ran_proccesses.append(procs)
    return list_of_ran_proccesses

def CompareRunningFiles():
    if ini == "start":
        list_of_old_procs = getTaskList()
        while list_of_old_procs == getTaskList():
            time.sleep(0.01)
        for new_procs in psutil.process_iter():
            print(new_procs.exe())

CompareRunningFiles()

烧瓶代码

ERROR:application:Exception on /new-item [POST]
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/ubuntu/final-project/helpers.py", line 34, in decorated_function
    return f(*args, **kwargs)
  File "/home/ubuntu/final-project/application.py", line 45, in decorated_function
    return f(*args, **kwargs)
  File "/home/ubuntu/final-project/application.py", line 350, in newItem
    file.save(os.path.join(app.config['IMAGE_UPLOADS'], filename))
  File "/usr/local/lib/python3.7/site-packages/werkzeug/datastructures.py", line 2800, in save
    dst = open(dst, "wb")
IsADirectoryError: [Errno 21] Is a directory: 'static/img/menu/'

HTML代码

app.config["IMAGE_UPLOADS"] = "static/img/menu/"

@app.route("/new-item", methods=['GET', 'POST'])
def newItem():
    if request.method == "POST":

        if request.files:
            file = request.files["file"]
            filename = secure_filename(file.filename)
            file.save(os.path.join(app.config['IMAGE_UPLOADS'], filename))

您知道导致错误的原因是什么吗？

Answer 1

您需要删除斜杠，这是对os.path.join的误用

app.config["IMAGE_UPLOADS"] = "static/img/menu" # drop the trailing slash

请参见Why doesn't os.path.join() work in this case?

您可能还需要将app.config["IMAGE_UPLOADS"]更新为绝对路径，而不是相对路径。

使用Flask上传文件时出现内部服务器错误

1 个答案: