def add_file(self, name, file, filename=None, content_type=None):
"""Adds a new file to the dict. `file` can be a file name or
a :class:`file`-like or a :class:`FileStorage` object.
:param name: the name of the field.
:param file: a filename or :class:`file`-like object
:param filename: an optional filename
:param content_type: an optional content type
"""
if isinstance(file, FileStorage):
value = file
else:
if isinstance(file, string_types):
if filename is None:
filename = file
file = open(file, 'rb')
if filename and content_type is None:
content_type = mimetypes.guess_type(filename)[0] or \
'application/octet-stream'
value = FileStorage(file, filename, name, content_type)
self.add(name, value)
python类guess_type()的实例源码
def add_file(self, name, file, filename=None, content_type=None):
"""Adds a new file to the dict. `file` can be a file name or
a :class:`file`-like or a :class:`FileStorage` object.
:param name: the name of the field.
:param file: a filename or :class:`file`-like object
:param filename: an optional filename
:param content_type: an optional content type
"""
if isinstance(file, FileStorage):
value = file
else:
if isinstance(file, string_types):
if filename is None:
filename = file
file = open(file, 'rb')
if filename and content_type is None:
content_type = mimetypes.guess_type(filename)[0] or \
'application/octet-stream'
value = FileStorage(file, filename, name, content_type)
self.add(name, value)
def add_file(self, name, file, filename=None, content_type=None):
"""Adds a new file to the dict. `file` can be a file name or
a :class:`file`-like or a :class:`FileStorage` object.
:param name: the name of the field.
:param file: a filename or :class:`file`-like object
:param filename: an optional filename
:param content_type: an optional content type
"""
if isinstance(file, FileStorage):
value = file
else:
if isinstance(file, string_types):
if filename is None:
filename = file
file = open(file, 'rb')
if filename and content_type is None:
content_type = mimetypes.guess_type(filename)[0] or \
'application/octet-stream'
value = FileStorage(file, filename, name, content_type)
self.add(name, value)
def __init__(self, filename, mimetype=None, chunksize=DEFAULT_CHUNK_SIZE,
resumable=False):
"""Constructor.
Args:
filename: string, Name of the file.
mimetype: string, Mime-type of the file. If None then a mime-type will be
guessed from the file extension.
chunksize: int, File will be uploaded in chunks of this many bytes. Only
used if resumable=True. Pass in a value of -1 if the file is to be
uploaded in a single chunk. Note that Google App Engine has a 5MB limit
on request size, so you should never set your chunksize larger than 5MB,
or to -1.
resumable: bool, True if this is a resumable upload. False means upload
in a single request.
"""
self._filename = filename
fd = open(self._filename, 'rb')
if mimetype is None:
(mimetype, encoding) = mimetypes.guess_type(filename)
super(MediaFileUpload, self).__init__(fd, mimetype, chunksize=chunksize,
resumable=resumable)
def get(self, path):
"""Serve the requested resource to the client.
Super class will validate credentials. Returns the file in the HTTP
response, or a 404 if the resource can not be found.
Args:
path: path to the resource.
"""
abs_path = os.path.abspath(os.path.join('static', path))
if '..' in abs_path:
self.response.set_status(400)
return
if os.path.isdir(abs_path) or abs_path.find(os.getcwd()) != 0:
self.response.set_status(403)
return
try:
with open(abs_path, 'r') as f:
content_type = mimetypes.guess_type(abs_path)[0]
self.response.content_type = content_type
self.response.out.write(f.read())
except IOError:
self.response.set_status(404)
def guess_content_type(filename, default='application/octet-stream'):
"""
Guess the "Content-Type" of a file.
:param filename:
The filename to guess the "Content-Type" of using :mod:`mimetypes`.
:param default:
If no "Content-Type" can be guessed, default to `default`.
"""
if filename:
return mimetypes.guess_type(filename)[0] or default
return default
def send(self, request, stream=None, timeout=None, verify=None, cert=None,
proxies=None):
pathname = url_to_path(request.url)
resp = Response()
resp.status_code = 200
resp.url = request.url
try:
stats = os.stat(pathname)
except OSError as exc:
resp.status_code = 404
resp.raw = exc
else:
modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
content_type = mimetypes.guess_type(pathname)[0] or "text/plain"
resp.headers = CaseInsensitiveDict({
"Content-Type": content_type,
"Content-Length": stats.st_size,
"Last-Modified": modified,
})
resp.raw = open(pathname, "rb")
resp.close = resp.raw.close
return resp
def unpack_http_url(link, location, download_dir=None,
session=None, hashes=None):
if session is None:
raise TypeError(
"unpack_http_url() missing 1 required keyword argument: 'session'"
)
temp_dir = tempfile.mkdtemp('-unpack', 'pip-')
# If a download dir is specified, is the file already downloaded there?
already_downloaded_path = None
if download_dir:
already_downloaded_path = _check_download_dir(link,
download_dir,
hashes)
if already_downloaded_path:
from_path = already_downloaded_path
content_type = mimetypes.guess_type(from_path)[0]
else:
# let's download to a tmp dir
from_path, content_type = _download_http_url(link,
session,
temp_dir,
hashes)
# unpack the archive to the build dir location. even when only downloading
# archives, they have to be unpacked to parse dependencies
unpack_file(from_path, location, content_type, link)
# a download dir is specified; let's copy the archive there
if download_dir and not already_downloaded_path:
_copy_file(from_path, download_dir, link)
if not already_downloaded_path:
os.unlink(from_path)
rmtree(temp_dir)
def serve(self, request, path):
response = HttpResponse()
fullpath = os.path.join(settings.PRIVATE_MEDIA_ROOT, path)
response['X-Accel-Redirect'] = fullpath
response['Content-Type'] = mimetypes.guess_type(path)[0] or 'application/octet-stream'
return response
def serve(self, request, path):
fullpath = os.path.join(settings.PRIVATE_MEDIA_ROOT, path)
response = HttpResponse()
response['X-Sendfile'] = fullpath
# From django-filer (https://github.com/stefanfoulis/django-filer/):
# This is needed for lighttpd, hopefully this will
# not be needed after this is fixed:
# http://redmine.lighttpd.net/issues/2076
response['Content-Type'] = mimetypes.guess_type(path)[0] or 'application/octet-stream'
# filename = os.path.basename(path)
# response['Content-Disposition'] = smart_str(u'attachment; filename={0}'.format(filename))
return response
def guess_content_type(filename, default='application/octet-stream'):
"""
Guess the "Content-Type" of a file.
:param filename:
The filename to guess the "Content-Type" of using :mod:`mimetypes`.
:param default:
If no "Content-Type" can be guessed, default to `default`.
"""
if filename:
return mimetypes.guess_type(filename)[0] or default
return default
def guess_content_type(filename, default='application/octet-stream'):
"""
Guess the "Content-Type" of a file.
:param filename:
The filename to guess the "Content-Type" of using :mod:`mimetypes`.
:param default:
If no "Content-Type" can be guessed, default to `default`.
"""
if filename:
return mimetypes.guess_type(filename)[0] or default
return default
def send(self, request, stream=None, timeout=None, verify=None, cert=None,
proxies=None):
pathname = url_to_path(request.url)
resp = Response()
resp.status_code = 200
resp.url = request.url
try:
stats = os.stat(pathname)
except OSError as exc:
resp.status_code = 404
resp.raw = exc
else:
modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
content_type = mimetypes.guess_type(pathname)[0] or "text/plain"
resp.headers = CaseInsensitiveDict({
"Content-Type": content_type,
"Content-Length": stats.st_size,
"Last-Modified": modified,
})
resp.raw = open(pathname, "rb")
resp.close = resp.raw.close
return resp
def unpack_http_url(link, location, download_dir=None,
session=None, hashes=None):
if session is None:
raise TypeError(
"unpack_http_url() missing 1 required keyword argument: 'session'"
)
temp_dir = tempfile.mkdtemp('-unpack', 'pip-')
# If a download dir is specified, is the file already downloaded there?
already_downloaded_path = None
if download_dir:
already_downloaded_path = _check_download_dir(link,
download_dir,
hashes)
if already_downloaded_path:
from_path = already_downloaded_path
content_type = mimetypes.guess_type(from_path)[0]
else:
# let's download to a tmp dir
from_path, content_type = _download_http_url(link,
session,
temp_dir,
hashes)
# unpack the archive to the build dir location. even when only downloading
# archives, they have to be unpacked to parse dependencies
unpack_file(from_path, location, content_type, link)
# a download dir is specified; let's copy the archive there
if download_dir and not already_downloaded_path:
_copy_file(from_path, download_dir, link)
if not already_downloaded_path:
os.unlink(from_path)
rmtree(temp_dir)
def add_file(self, fieldname, filename, fileHandle, mimetype=None):
body = fileHandle.read()
if mimetype is None:
mimetype = mimetypes.guess_type(filename)[
0] or 'application/ octet-stream'
self.files.append((fieldname, filename, mimetype, body))
def open_local_file(self, req):
import email.utils
import mimetypes
host = req.get_host()
filename = req.get_selector()
localfile = url2pathname(filename)
try:
stats = os.stat(localfile)
size = stats.st_size
modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
mtype = mimetypes.guess_type(filename)[0]
headers = mimetools.Message(StringIO(
'Content-type: %s\nContent-length: %d\nLast-modified: %s\n' %
(mtype or 'text/plain', size, modified)))
if host:
host, port = splitport(host)
if not host or \
(not port and _safe_gethostbyname(host) in self.get_names()):
if host:
origurl = 'file://' + host + filename
else:
origurl = 'file://' + filename
return addinfourl(open(localfile, 'rb'), headers, origurl)
except OSError, msg:
# urllib2 users shouldn't expect OSErrors coming from urlopen()
raise URLError(msg)
raise URLError('file not on local host')
def open_local_file(self, url):
"""Use local file."""
import mimetypes, mimetools, email.utils
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
host, file = splithost(url)
localname = url2pathname(file)
try:
stats = os.stat(localname)
except OSError, e:
raise IOError(e.errno, e.strerror, e.filename)
size = stats.st_size
modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
mtype = mimetypes.guess_type(url)[0]
headers = mimetools.Message(StringIO(
'Content-Type: %s\nContent-Length: %d\nLast-modified: %s\n' %
(mtype or 'text/plain', size, modified)))
if not host:
urlfile = file
if file[:1] == '/':
urlfile = 'file://' + file
return addinfourl(open(localname, 'rb'),
headers, urlfile)
host, port = splitport(host)
if not port \
and socket.gethostbyname(host) in (localhost(), thishost()):
urlfile = file
if file[:1] == '/':
urlfile = 'file://' + file
return addinfourl(open(localname, 'rb'),
headers, urlfile)
raise IOError, ('local file error', 'not on local host')
def __init__(self, *args, **kwargs):
"""
Set name, ext and content_type (if possible) automatically initialize by path.
"""
super(File, self).__init__(*args, **kwargs)
pieces = os.path.splitext(os.path.basename(str(self.path)))
self.name, self.ext = pieces[0], pieces[1][1:]
self.content_type = mimetypes.guess_type(self.full_path)[0]
def guess_content_type(filename, default='application/octet-stream'):
"""
Guess the "Content-Type" of a file.
:param filename:
The filename to guess the "Content-Type" of using :mod:`mimetypes`.
:param default:
If no "Content-Type" can be guessed, default to `default`.
"""
if filename:
return mimetypes.guess_type(filename)[0] or default
return default
def __init__(self, filename, mimetype=None, chunksize=DEFAULT_CHUNK_SIZE,
resumable=False):
"""Constructor.
Args:
filename: string, Name of the file.
mimetype: string, Mime-type of the file. If None then a mime-type will be
guessed from the file extension.
chunksize: int, File will be uploaded in chunks of this many bytes. Only
used if resumable=True. Pass in a value of -1 if the file is to be
uploaded in a single chunk. Note that Google App Engine has a 5MB limit
on request size, so you should never set your chunksize larger than 5MB,
or to -1.
resumable: bool, True if this is a resumable upload. False means upload
in a single request.
"""
self._filename = filename
fd = open(self._filename, 'rb')
if mimetype is None:
# No mimetype provided, make a guess.
mimetype, _ = mimetypes.guess_type(filename)
if mimetype is None:
# Guess failed, use octet-stream.
mimetype = 'application/octet-stream'
super(MediaFileUpload, self).__init__(fd, mimetype, chunksize=chunksize,
resumable=resumable)
