Djangoのutils.encoding.escape_uri_path()関数詳細解説

What is django.utils.encoding.escape_uri_path()?

The django.utils.encoding.escape_uri_path() function is used to encode a string for use in a URL path. This means that it converts any characters in the string that are not allowed in URLs into their corresponding URL-encoded equivalents.

Why is it useful?

URLs can only contain a limited set of characters. This is because they are used to communicate with web servers, and web servers need to be able to parse and understand the URLs that are sent to them. If a URL contains a character that is not allowed, the web server will not be able to parse it correctly, and the user will get an error.

The escape_uri_path() function helps to prevent this by encoding any characters in the string that are not allowed in URLs. This ensures that URLs are always valid and can be correctly parsed by web servers.

How does it work?

The escape_uri_path() function works by using the urllib.parse.quote() function to encode the string. The quote() function takes a string as input and returns a new string that is URL-encoded. This means that any characters in the original string that are not allowed in URLs are replaced with their corresponding URL-encoded equivalents.

Here is an example of how to use the escape_uri_path() function

from django.utils.encoding import escape_uri_path

path = "My Document.pdf"
encoded_path = escape_uri_path(path)
print(encoded_path)

This code will print the following output:

My%20Document.pdf

As you can see, the escape_uri_path() function has converted the space in the original string to its URL-encoded equivalent, %20. This ensures that the URL is valid and can be correctly parsed by web servers.

• The escape_uri_path() function does not encode all characters. For example, it does not encode the following characters:
• The escape_uri_path() function is safe to use with strings that are already URL-encoded. This means that you can call the function on a string without worrying about it being double-encoded.

- /
- .
- :
- _
- @
- $
- +
- =

---

from django.http import HttpResponse
from django.utils.encoding import escape_uri_path

def download_file(request, filename):
    response = HttpResponse(content_type='application/octet-stream')
    response['Content-Disposition'] = 'attachment; filename=%s' % escape_uri_path(filename)

    with open(filename, 'rb') as f:
        response.write(f.read())

    return response

This view takes a filename as input and returns an HTTP response that contains the file. The escape_uri_path() function is used to encode the filename so that it is safe to use in the URL.

Here is an example of how to use the view:

from django.urls import path

from .views import download_file

urlpatterns = [
    path('download/<filename>', download_file, name='download_file'),
]

---

• Use the urlencode() function from the django.utils.http module
  This is a function that is included in the Django framework. The urlencode() function is designed to encode a dictionary of key-value pairs for use in a URL query string. However, it can also be used to encode a single string.
• Use the quote() function from the six package
  This is a function that is included in the six package, which is a popular third-party package for Python. The quote() function from the six package is compatible with both Python 2 and Python 3.
• Use the urllib.parse.quote() function
  This is the most common way to encode a string for use in a URL path. It is a built-in function in the Python standard library.

Here is an example of how to use the urllib.parse.quote() function to encode a string:

import urllib.parse

path = "My Document.pdf"
encoded_path = urllib.parse.quote(path)
print(encoded_path)

My%20Document.pdf

Here is an example of how to use the quote() function from the six package to encode a string:

import six

path = "My Document.pdf"
encoded_path = six.moves.urllib.parse.quote(path)
print(encoded_path)

My%20Document.pdf

Here is an example of how to use the urlencode() function from the django.utils.http module to encode a string:

from django.utils.http import urlencode

path = "My Document.pdf"
encoded_path = urlencode({"path": path})
print(encoded_path)

path=My%20Document.pdf

As you can see, all of these methods will produce the same result. The best method to use will depend on your specific needs. If you are already using the Django framework, then the urlencode() function is a good option. If you are not using Django, then the urllib.parse.quote() function or the quote() function from the six package are good options.