141 lines
5.0 KiB
Python
141 lines
5.0 KiB
Python
"""
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Views and functions for serving static files. These are only to be used
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during development, and SHOULD NOT be used in a production setting.
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"""
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import mimetypes
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import os
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import posixpath
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import re
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import stat
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import urllib
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from email.Utils import parsedate_tz, mktime_tz
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from django.template import loader
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from django.http import Http404, HttpResponse, HttpResponseRedirect, HttpResponseNotModified
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from django.template import Template, Context, TemplateDoesNotExist
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from django.utils.http import http_date
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def serve(request, path, document_root=None, show_indexes=False):
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"""
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Serve static files below a given point in the directory structure.
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To use, put a URL pattern such as::
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(r'^(?P<path>.*)$', 'django.views.static.serve', {'document_root' : '/path/to/my/files/'})
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in your URLconf. You must provide the ``document_root`` param. You may
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also set ``show_indexes`` to ``True`` if you'd like to serve a basic index
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of the directory. This index view will use the template hardcoded below,
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but if you'd like to override it, you can create a template called
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``static/directory_index.html``.
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"""
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# Clean up given path to only allow serving files below document_root.
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path = posixpath.normpath(urllib.unquote(path))
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path = path.lstrip('/')
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newpath = ''
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for part in path.split('/'):
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if not part:
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# Strip empty path components.
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continue
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drive, part = os.path.splitdrive(part)
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head, part = os.path.split(part)
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if part in (os.curdir, os.pardir):
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# Strip '.' and '..' in path.
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continue
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newpath = os.path.join(newpath, part).replace('\\', '/')
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if newpath and path != newpath:
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return HttpResponseRedirect(newpath)
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fullpath = os.path.join(document_root, newpath)
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if os.path.isdir(fullpath):
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if show_indexes:
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return directory_index(newpath, fullpath)
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raise Http404("Directory indexes are not allowed here.")
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if not os.path.exists(fullpath):
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raise Http404('"%s" does not exist' % fullpath)
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# Respect the If-Modified-Since header.
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statobj = os.stat(fullpath)
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mimetype, encoding = mimetypes.guess_type(fullpath)
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mimetype = mimetype or 'application/octet-stream'
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if not was_modified_since(request.META.get('HTTP_IF_MODIFIED_SINCE'),
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statobj[stat.ST_MTIME], statobj[stat.ST_SIZE]):
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return HttpResponseNotModified(mimetype=mimetype)
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contents = open(fullpath, 'rb').read()
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response = HttpResponse(contents, mimetype=mimetype)
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response["Last-Modified"] = http_date(statobj[stat.ST_MTIME])
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response["Content-Length"] = len(contents)
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if encoding:
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response["Content-Encoding"] = encoding
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return response
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DEFAULT_DIRECTORY_INDEX_TEMPLATE = """
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
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<meta http-equiv="Content-Language" content="en-us" />
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<meta name="robots" content="NONE,NOARCHIVE" />
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<title>Index of {{ directory }}</title>
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</head>
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<body>
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<h1>Index of {{ directory }}</h1>
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<ul>
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{% ifnotequal directory "/" %}
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<li><a href="../">../</a></li>
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{% endifnotequal %}
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{% for f in file_list %}
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<li><a href="{{ f|urlencode }}">{{ f }}</a></li>
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{% endfor %}
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</ul>
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</body>
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</html>
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"""
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def directory_index(path, fullpath):
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try:
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t = loader.select_template(['static/directory_index.html',
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'static/directory_index'])
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except TemplateDoesNotExist:
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t = Template(DEFAULT_DIRECTORY_INDEX_TEMPLATE, name='Default directory index template')
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files = []
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for f in os.listdir(fullpath):
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if not f.startswith('.'):
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if os.path.isdir(os.path.join(fullpath, f)):
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f += '/'
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files.append(f)
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c = Context({
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'directory' : path + '/',
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'file_list' : files,
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})
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return HttpResponse(t.render(c))
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def was_modified_since(header=None, mtime=0, size=0):
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"""
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Was something modified since the user last downloaded it?
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header
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This is the value of the If-Modified-Since header. If this is None,
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I'll just return True.
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mtime
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This is the modification time of the item we're talking about.
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size
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This is the size of the item we're talking about.
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"""
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try:
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if header is None:
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raise ValueError
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matches = re.match(r"^([^;]+)(; length=([0-9]+))?$", header,
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re.IGNORECASE)
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header_mtime = mktime_tz(parsedate_tz(matches.group(1)))
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header_len = matches.group(3)
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if header_len and int(header_len) != size:
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raise ValueError
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if mtime > header_mtime:
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raise ValueError
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except (AttributeError, ValueError, OverflowError):
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return True
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return False
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