使用 url_for 链接到 Flask 静态文件 [英] Link to Flask static files with url_for

问题描述

如何在 Flask 中使用 url_for 来引用文件夹中的文件?例如，我在 static 文件夹中有一些静态文件，其中一些可能在 static/bootstrap 等子文件夹中.

How do you use url_for in Flask to reference a file in a folder? For example, I have some static files in the static folder, some of which may be in subfolders such as static/bootstrap.

当我尝试从 static/bootstrap 提供文件时，出现错误.

When I try to serve a file from static/bootstrap, I get an error.

 <link rel=stylesheet type=text/css href="{{ url_for('static/bootstrap', filename='bootstrap.min.css') }}">

我可以引用不在子文件夹中的文件，这很有效.

I can reference files that aren't in subfolders with this, which works.

 <link rel=stylesheet type=text/css href="{{ url_for('static', filename='bootstrap.min.css') }}">

使用 url_for 引用静态文件的正确方法是什么?如何使用 url_for 生成任何级别的静态文件的 url?

What is the correct way to reference static files with url_for? How do I use url_for to generate urls to static files at any level?

推荐答案

默认情况下，您拥有 static 端点 用于静态文件.此外，Flask 应用程序具有以下参数:

You have by default the static endpoint for static files. Also Flask application has the following arguments:

static_url_path:可用于为网络上的静态文件指定不同的路径.默认为 static_folder 文件夹的名称.

static_url_path: can be used to specify a different path for the static files on the web. Defaults to the name of the static_folder folder.

static_folder:包含应在 static_url_path 处提供的静态文件的文件夹.默认为应用程序根路径中的静态"文件夹.

static_folder: the folder with static files that should be served at static_url_path. Defaults to the 'static' folder in the root path of the application.

这意味着 filename 参数将采用 static_folder 中文件的相对路径，并将其转换为与 static_url_default 结合的相对路径:

It means that the filename argument will take a relative path to your file in static_folder and convert it to a relative path combined with static_url_default:

url_for('static', filename='path/to/file')

会将文件路径从static_folder/path/to/file 转换为url路径static_url_default/path/to/file.

will convert the file path from static_folder/path/to/file to the url path static_url_default/path/to/file.

因此，如果您想从 static/bootstrap 文件夹中获取文件，请使用以下代码:

So if you want to get files from the static/bootstrap folder you use this code:

<link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='bootstrap/bootstrap.min.css') }}">

将转换为(使用默认设置):

Which will be converted to (using default settings):

<link rel="stylesheet" type="text/css" href="static/bootstrap/bootstrap.min.css">

另请参阅url_for 文档.

Also look at url_for documentation.

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