尝试从视图写入文件时，权限被拒绝 [英] Permission denied when trying to write to file from a view

问题描述

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我有一个试图执行f = open('textfile.txt', 'w')的视图，但是在我的活动服务器上，这会引发错误[Errno 13] Permission denied: 'textfile.txt'.

I have a view that attempts to execute f = open('textfile.txt', 'w') but on my live server this brings up the error [Errno 13] Permission denied: 'textfile.txt'.

我的文件结构如下:

- root
    |
    - project
          |
          - app
          |
          - media

视图位于app的位置.

我尝试将textfile.txt驻留在根目录，项目，应用程序和媒体中，所有这些文件均具有777文件权限(所有者，组和公众可以读取，写入和执行)[* 1].

I have tried having textfile.txt live in root, project, app and media all of which have 777 file permissions (owner, group and public can read, write and execute)[*1].

如果我将命令更改为读取权限，即f = open('textfile.txt', 'r')，我将收到相同的错误.

If I change the command to a read permission ie f = open('textfile.txt', 'r') I get the same error.

我的媒体根目录设置为os.path.join(os.path.dirname(__file__), 'media').replace('\\','/') 并且所有这些都通过webfaction在apache服务器上运行.

My media root is set to os.path.join(os.path.dirname(__file__), 'media').replace('\\','/') and this is all running on an apache server through webfaction.

所以我有两个问题. django/python在哪里尝试从中打开此文件?以及需要进行哪些更改才能获得视图打开和写入文件的权限.

So I have two questions. Where is django/python trying to open this file from? and what do I need to change to get permission for the view to open and write to the file.

[* 1]我知道这不是一个好主意，我只是出于当前调试目的而设置了此设置.

[*1] I know this is not a good idea, I just have this set for current debugging purposes.

我不知道这是否相关，但是现在当我将其更改为f = open(os.path.join(settings.MEDIA_URL, 'textfile.txt'), 'r')而不是f = open(os.path.join(settings.MEDIA_URL, 'textfile.txt'), 'w')时，出现错误[Errno 2] No such file or directory.

I don't know if this is relevant but now when I change it to f = open(os.path.join(settings.MEDIA_URL, 'textfile.txt'), 'r') rather than f = open(os.path.join(settings.MEDIA_URL, 'textfile.txt'), 'w') I get the error [Errno 2] No such file or directory.

我不知道这是否有意义...

I don't know if this has meaning or not...

推荐答案

给出以下内容:

f = open('textfile.txt', 'w')

应该在与当前场景中正在运行的脚本__file__或views.py相同的目录中创建文件.

It should be creating the file in same directory as __file__, the currently running script or views.py in your scenario.

但是，最好明确一些，从而排除任何潜在的偏差.我建议将该行更改为:

However, it's better to be explicit, and therefore rule out any potential deviations. I'd recommend changing that line to:

import os
f = open(os.path.join(os.path.dirname(__file__), 'textfile.txt'), 'w')

甚至更好，例如:

import os
from django.conf import settings
f = open(os.path.join(settings.MEDIA_ROOT, 'textfile.txt'), 'w')

然后，您总是可以完全确定 保存文件的位置，这将使您可以更适当地优化权限.或者，您可以使用PROJECT_ROOT.

Then, you're always assured exactly where the file is being saved, which should allow you to optimize your permissions more appropriately. Alternatively, you can use a PROJECT_ROOT.

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