def get_version(cls, settings, path):
'''
Generate the version string to be used in static URLs.
This method may be overridden in subclasses (but note that it
is a class method rather than a static method). The default
implementation uses a hash of the file's contents.
``settings`` is the `Application.settings` dictionary and ``path``
is the relative location of the requested asset on the filesystem.
The returned value should be a string, or ``None`` if no version
could be determined.
'''
abs_path = os.path.join(settings["static_path"], path)
with cls._lock:
hashes = cls._static_hashes
if abs_path not in hashes:
try:
data = FileCache.get(abs_path)
hashes[abs_path] = hashlib.md5(data).hexdigest()
except Exception:
logging.error("Could not open static file %r", path)
hashes[abs_path] = None
hsh = hashes.get(abs_path)
if hsh:
return hsh[:5]
return None
def get_version(cls, settings, path):
'''
Generate the version string to be used in static URLs.
This method may be overridden in subclasses (but note that it
is a class method rather than a static method). The default
implementation uses a hash of the file's contents.
``settings`` is the `Application.settings` dictionary and ``path``
is the relative location of the requested asset on the filesystem.
The returned value should be a string, or ``None`` if no version
could be determined.
'''
abs_path = os.path.join(settings["static_path"], path)
with cls._lock:
hashes = cls._static_hashes
if abs_path not in hashes:
try:
data = FileCache.get(abs_path)
hashes[abs_path] = hashlib.md5(data).hexdigest()
except Exception:
logging.error("Could not open static file %r", path)
hashes[abs_path] = None
hsh = hashes.get(abs_path)
if hsh:
return hsh[:5]
return None
def get(self, path, include_body=True):
path = self.parse_url_path(path)
abspath = os.path.abspath(os.path.join(self.root, path))
# os.path.abspath strips a trailing /
# it needs to be temporarily added back for requests to root/
if not (abspath + os.path.sep).startswith(self.root):
raise HTTPError(403, "%s is not in root static directory", path)
if os.path.isdir(abspath) and self.default_filename is not None:
# need to look at the request.path here for when path is empty
# but there is some prefix to the path that was already
# trimmed by the routing
if not self.request.path.endswith("/"):
self.redirect(self.request.path + "/")
return
abspath = os.path.join(abspath, self.default_filename)
if not os.path.exists(abspath):
raise HTTPError(404)
if not os.path.isfile(abspath):
raise HTTPError(403, "%s is not a file", path)
stat_result = os.stat(abspath)
modified = datetime.datetime.fromtimestamp(stat_result[stat.ST_MTIME])
self.set_header("Last-Modified", modified)
mime_type, encoding = mimetypes.guess_type(abspath)
if mime_type:
self.set_header("Content-Type", mime_type)
cache_time = self.get_cache_time(path, modified, mime_type)
if cache_time > 0:
self.set_header("Expires", datetime.datetime.utcnow() +
datetime.timedelta(seconds=cache_time))
self.set_header("Cache-Control", "max-age=" + str(cache_time))
else:
self.set_header("Cache-Control", "public")
self.set_extra_headers(path)
# Check the If-Modified-Since, and don't send the result if the
# content has not been modified
ims_value = self.request.headers.get("If-Modified-Since")
if ims_value is not None:
date_tuple = email.utils.parsedate(ims_value)
if_since = datetime.datetime.fromtimestamp(time.mktime(date_tuple))
if if_since >= modified:
self.set_status(304)
return
data = FileCache.get(abspath)
hasher = hashlib.sha1()
hasher.update(data)
self.set_header("Etag", '"%s"' % hasher.hexdigest())
if include_body:
self.write(data)
else:
assert self.request.method == "HEAD"
self.set_header("Content-Length", len(data))
def get(self, path, include_body=True):
path = self.parse_url_path(path)
abspath = os.path.abspath(os.path.join(self.root, path))
# os.path.abspath strips a trailing /
# it needs to be temporarily added back for requests to root/
if not (abspath + os.path.sep).startswith(self.root):
raise HTTPError(403, "%s is not in root static directory", path)
if os.path.isdir(abspath) and self.default_filename is not None:
# need to look at the request.path here for when path is empty
# but there is some prefix to the path that was already
# trimmed by the routing
if not self.request.path.endswith("/"):
self.redirect(self.request.path + "/")
return
abspath = os.path.join(abspath, self.default_filename)
if not os.path.exists(abspath):
raise HTTPError(404)
if not os.path.isfile(abspath):
raise HTTPError(403, "%s is not a file", path)
stat_result = os.stat(abspath)
modified = datetime.datetime.fromtimestamp(stat_result[stat.ST_MTIME])
self.set_header("Last-Modified", modified)
mime_type, encoding = mimetypes.guess_type(abspath)
if mime_type:
self.set_header("Content-Type", mime_type)
cache_time = self.get_cache_time(path, modified, mime_type)
if cache_time > 0:
self.set_header(
"Expires",
datetime.datetime.utcnow() +
datetime.timedelta(seconds=cache_time))
self.set_header("Cache-Control", "max-age=" + str(cache_time))
else:
self.set_header("Cache-Control", "public")
self.set_extra_headers(path)
# Check the If-Modified-Since, and don't send the result if the
# content has not been modified
ims_value = self.request.headers.get("If-Modified-Since")
if ims_value is not None:
date_tuple = email.utils.parsedate(ims_value)
if_since = datetime.datetime.fromtimestamp(time.mktime(date_tuple))
if if_since >= modified:
self.set_status(304)
return
data = FileCache.get(abspath)
hasher = hashlib.sha1()
hasher.update(data)
self.set_header("Etag", '"%s"' % hasher.hexdigest())
if include_body:
self.write(data)
else:
assert self.request.method == "HEAD"
self.set_header("Content-Length", len(data))
