| from django.template import loader |
| from django.http import Http404, HttpResponse, HttpResponseRedirect, HttpResponseNotModified |
| from django.template import Template, Context, TemplateDoesNotExist |
| import mimetypes |
| import os |
| import posixpath |
| import re |
| import rfc822 |
| import stat |
| import urllib |
| |
| def serve(request, path, document_root=None, show_indexes=False): |
| """ |
| Serve static files below a given point in the directory structure. |
| |
| To use, put a URL pattern such as:: |
| |
| (r'^(?P<path>.*)$', 'django.views.static.serve', {'document_root' : '/path/to/my/files/'}) |
| |
| in your URLconf. You must provide the ``document_root`` param. You may |
| also set ``show_indexes`` to ``True`` if you'd like to serve a basic index |
| of the directory. This index view will use the template hardcoded below, |
| but if you'd like to override it, you can create a template called |
| ``static/directory_index``. |
| """ |
| |
| # Clean up given path to only allow serving files below document_root. |
| path = posixpath.normpath(urllib.unquote(path)) |
| newpath = '' |
| for part in path.split('/'): |
| if not part: |
| # strip empty path components |
| continue |
| drive, part = os.path.splitdrive(part) |
| head, part = os.path.split(part) |
| if part in (os.curdir, os.pardir): |
| # strip '.' amd '..' in path |
| continue |
| newpath = os.path.join(newpath, part).replace('\\', '/') |
| if newpath and path != newpath: |
| return HttpResponseRedirect(newpath) |
| fullpath = os.path.join(document_root, newpath) |
| if os.path.isdir(fullpath): |
| if show_indexes: |
| return directory_index(newpath, fullpath) |
| raise Http404, "Directory indexes are not allowed here." |
| if not os.path.exists(fullpath): |
| raise Http404, '"%s" does not exist' % fullpath |
| # Respect the If-Modified-Since header. |
| statobj = os.stat(fullpath) |
| if not was_modified_since(request.META.get('HTTP_IF_MODIFIED_SINCE'), |
| statobj[stat.ST_MTIME], statobj[stat.ST_SIZE]): |
| return HttpResponseNotModified() |
| mimetype = mimetypes.guess_type(fullpath)[0] |
| contents = open(fullpath, 'rb').read() |
| response = HttpResponse(contents, mimetype=mimetype) |
| response["Last-Modified"] = rfc822.formatdate(statobj[stat.ST_MTIME]) |
| return response |
| |
| DEFAULT_DIRECTORY_INDEX_TEMPLATE = """ |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> |
| <head> |
| <meta http-equiv="Content-type" content="text/html; charset=utf-8" /> |
| <meta http-equiv="Content-Language" content="en-us" /> |
| <meta name="robots" content="NONE,NOARCHIVE" /> |
| <title>Index of {{ directory|escape }}</title> |
| </head> |
| <body> |
| <h1>Index of {{ directory|escape }}</h1> |
| <ul> |
| {% for f in file_list %} |
| <li><a href="{{ f|urlencode }}">{{ f|escape }}</a></li> |
| {% endfor %} |
| </ul> |
| </body> |
| </html> |
| """ |
| |
| def directory_index(path, fullpath): |
| try: |
| t = loader.get_template('static/directory_index') |
| except TemplateDoesNotExist: |
| t = Template(DEFAULT_DIRECTORY_INDEX_TEMPLATE, name='Default directory index template') |
| files = [] |
| for f in os.listdir(fullpath): |
| if not f.startswith('.'): |
| if os.path.isdir(os.path.join(fullpath, f)): |
| f += '/' |
| files.append(f) |
| c = Context({ |
| 'directory' : path + '/', |
| 'file_list' : files, |
| }) |
| return HttpResponse(t.render(c)) |
| |
| def was_modified_since(header=None, mtime=0, size=0): |
| """ |
| Was something modified since the user last downloaded it? |
| |
| header |
| This is the value of the If-Modified-Since header. If this is None, |
| I'll just return True. |
| |
| mtime |
| This is the modification time of the item we're talking about. |
| |
| size |
| This is the size of the item we're talking about. |
| """ |
| try: |
| if header is None: |
| raise ValueError |
| matches = re.match(r"^([^;]+)(; length=([0-9]+))?$", header, |
| re.IGNORECASE) |
| header_mtime = rfc822.mktime_tz(rfc822.parsedate_tz( |
| matches.group(1))) |
| header_len = matches.group(3) |
| if header_len and int(header_len) != size: |
| raise ValueError |
| if mtime > header_mtime: |
| raise ValueError |
| except (AttributeError, ValueError): |
| return True |
| return False |
