上传文件后，我该怎么做才能将其输出显示在网页上？

如何解决上传文件后，我该怎么做才能将其输出显示在网页上？

我正在使用python和flask创建一个CRUD Web应用程序。

这里是查看输出的链接： http://zcds4327.pythonanywhere.com/

这是存储库的链接： https://github.com/OCTRACORE/cs_proj_pro_1

树结构：

.
├── Password_creator.py
├── __pycache__
│   ├── Password_creator.cpython-38.pyc
│   ├── exec_prog.cpython-38.pyc
│   ├── global_data.cpython-38.pyc
│   └── table.cpython-38.pyc
├── exec_prog.py
├── global_data.py
├── passwd_file
├── requirements.txt
├── start.sh
├── static
│   ├── AddPasswdInp.css
│   ├── dispManipMenu.css
│   ├── favicon_io
│   │   ├── android-chrome-192x192.png
│   │   ├── apple-touch-icon.png
│   │   ├── favicon-32x32.png
│   │   ├── favicon.ico
│   │   └── site.webmanifest
│   ├── input.css
│   ├── show.css
│   └── showOutput.css
├── table.py
└── template
    ├── add.html
    ├── file-manip.html
    ├── input.html
    ├── modify.html
    ├── output_disp.html
    ├── semantic-error.html
    └── str_main.html

Parent directory of the code:cs_proj_pro_1

代码段（来自exec_prog.py文件）：

@app.route('/generate/file-manip-upload',methods = ["GET","POST"])
def upload_file(): #for uploading the file

  decrypted_pass_output_lst = []
  decrypted_desc_output_lst = []
  decrypted_password = []
  decrypted_data = ""
  Upload_key = "" #for storing the key

  if request.method == "POST":
    Uploadpassfile= request.files['Uploadpassfile'] #requesting the name of the required file
    Uploadpassfile_name = secure_filename(Uploadpassfile.filename) #storing the name of the password saving file
    Uploadkeyfile = request.files['Uploadkeyfile'] #requesting the name of the key storing file
    Uploadkeyfile_name = secure_filename(Uploadkeyfile.filename) #storing the name of the key storing file
    descfileUpload = request.files['descfileUpload'] #requesting the name of the file storing descriptions
    descfileUpload_name = secure_filename(descfileUpload.filename) #storing the name of the file string descriptions
  #print(Uploadkeyfile_name,Uploadpassfile_name,descfileUpload_name)
   
    with open(Uploadkeyfile_name,"rb") as k: # reading the containing the key
      Upload_key = k.read()
    key_init_sec = Fernet(Upload_key)

    with open(Uploadpassfile_name,"rb") as k: # reading the file containing the passwords by decrypting them
       for i in k:
         decrypted_pass_output_lst.append(str(key_init_sec.decrypt(i),encoding="utf-8"))

    with open(descfileUpload_name,"rb") as k: #reading the file containing the descriptions by decrypting them
        for i in k:
          decrypted_desc_output_lst.append(str(key_init_sec.decrypt(i),encoding="utf-8"))

  x = len(decrypted_pass_output_lst)
  (GlobalData.password).clear() #clearing the GlobalData.password list to avoid piling up of data
  for s in range(x): #for inserting the decrypted data inside the GlobalData.password list for display
        data_decrypted = Table(decrypted_pass_output_lst[s],decrypted_desc_output_lst[s])
        (GlobalData.password).append(data_decrypted)

工作目录：

/home/ZCDS4327/proj/cs_proj_pro_1

使用的环境： PythonAnywhere

当我尝试保存密码及其对应的描述时，我需要通过单击位于页面上的save/upload / upload/save链接进入文件操作页面。主页和输出页面。

页面的路线为：

1。）http://zcds4327.pythonanywhere.com/generate/file-manip-disp

2。）http://zcds4327.pythonanywhere.com/generate/show-output

之后，我必须从本地计算机中选择三个文件。一个文件将通过加密来存储密码。另一个将通过加密来存储所有密码的描述。第三个将存储用于加密两个文件的密钥。之后，我必须单击提交按钮以保存它们。

文件最终存储在ZCDS4327文件夹中。

要再次以解密的方式在Web应用程序中显示输出，我必须通过页面上的“通过所需按钮上载部分”按钮选择包含所需数据的文件，然后单击“提交”以接收输出。

我已经在本地计算机上创建了一个虚拟环境，该环境在localhost服务器内部运行此程序的副本。如果我尝试将所有三个文件都从localhost服务器托管的应用程序上载到 pythonanywhere 服务器托管的应用程序中，则会收到内部服务器错误。我的目标是使用户能够从他们想要的系统的任何部分上载文件。

错误日志

2020-10-07 08:47:16,087: Exception on /generate/file-manip-upload [POST]
Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/flask/app.py",line 2446,in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/lib/python3.8/site-packages/flask/app.py",line 1951,in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/lib/python3.8/site-packages/flask/app.py",line 1820,in handle_user_exception
    reraise(exc_type,exc_value,tb)
  File "/usr/lib/python3.8/site-packages/flask/_compat.py",line 39,in reraise
    raise value
  File "/usr/lib/python3.8/site-packages/flask/app.py",line 1949,in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/lib/python3.8/site-packages/flask/app.py",line 1935,in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/ZCDS4327/proj/cs_proj_pro_1/exec_prog.py",line 155,in upload_file
    with open(Uploadkeyfile_name,"rb") as k: # reading the containing the key
FileNotFoundError: [Errno 2] No such file or directory: 'keyfile.txt'

在这里，我既是用户，也是开发人员。

那我该怎么做才能解决此错误？每个建议将不胜感激。

注释：

以本地主机服务器为例。我认为在其他任何服务器上也会遇到此问题。

用户保存的文件将下载到他们的系统中。尚未为此编写代码，在这种情况下，我认为不需要知道这一点。