author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Tue, 16 Sep 2008 15:56:15 +0000 | |
changeset 150 | 715b07485c48 |
parent 54 | 03e267d67478 |
child 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
54
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""" |
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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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|
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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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|
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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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|
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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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|
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To use, put a URL pattern such as:: |
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|
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(r'^(?P<path>.*)$', 'django.views.static.serve', {'document_root' : '/path/to/my/files/'}) |
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|
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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``. |
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""" |
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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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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() |
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mimetype = mimetypes.guess_type(fullpath)[0] or 'application/octet-stream' |
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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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return response |
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|
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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|escape }}</title> |
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</head> |
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<body> |
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<h1>Index of {{ directory|escape }}</h1> |
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<ul> |
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{% for f in file_list %} |
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<li><a href="{{ f|urlencode }}">{{ f|escape }}</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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88 |
|
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89 |
def directory_index(path, fullpath): |
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try: |
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t = loader.get_template('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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103 |
}) |
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return HttpResponse(t.render(c)) |
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|
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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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109 |
|
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110 |
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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113 |
|
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114 |
mtime |
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115 |
This is the modification time of the item we're talking about. |
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116 |
|
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117 |
size |
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118 |
This is the size of the item we're talking about. |
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119 |
""" |
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120 |
try: |
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121 |
if header is None: |
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122 |
raise ValueError |
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123 |
matches = re.match(r"^([^;]+)(; length=([0-9]+))?$", header, |
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124 |
re.IGNORECASE) |
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125 |
header_mtime = mktime_tz(parsedate_tz(matches.group(1))) |
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126 |
header_len = matches.group(3) |
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if header_len and int(header_len) != size: |
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128 |
raise ValueError |
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129 |
if mtime > header_mtime: |
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130 |
raise ValueError |
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131 |
except (AttributeError, ValueError): |
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132 |
return True |
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return False |