def writeCache(self, request, cache = None):
logging.debug('writeCache')
url = self.origin + request
headers = {'User-Agent' : http.userAgent}
# Bypass google cache
headers['Cache-Control'] = 'no-cache, max-age=0, must-revalidate'
if cache:
headers['If-Modified-Since'] = web.httpdate(cache.lastModified)
try:
response = urlfetch.Fetch(url=url, headers=headers)
except Exception, e:
if cache:
return cache
logging.warning('urlfetch error, redirect to origin. (%s: %s)' % (type(e), e))
raise web.SeeOther(url, absolute=True)
def writeCache(self, request, cache=None, _beforeWriteCache=None):
logging.debug('writeCache')
url = self.origin + request
if self.stripForwardedQueryString is True:
url = url.split('?').pop(0)
headers = {'User-Agent' : http.userAgent}
# Bypass google cache
headers['Cache-Control'] = 'no-cache, max-age=0, must-revalidate'
if not self.disableIfModifiedSince and cache:
headers['If-Modified-Since'] = web.httpdate(cache.lastModified)
try:
response = urlfetch.Fetch(url=url, headers=headers)
except Exception, e:
if cache:
return cache
logging.warning('urlfetch error, redirect to origin. (%s: %s)' % (type(e), e))
raise web.SeeOther(url, absolute=True)
def _post(self, f):
now = datetime.now()
web.lastmodified(now)
web.httpdate(now)
web.header('Cache-Control', 'no-cache,private')
web.header('Pragma', 'no-cache')
if isinstance(f, web.HTTPError) is True:
raise f
if self.download.type == self.DOWNLOAD_TYPE_NORMAL:
# nomal process
if self.__template__.media == "json":
try:
_r = simplejson.dumps(self.view)
return _r
except:
raise web.internalerror()
if f is True:
path = '%s/%s.%s' % (
self.__template__.dir.replace("controller", ""),
self.__template__.file.replace("controller", ""),
self.__template__.media)
try:
_r = self.__mako_render(path,
title='akiyoshi', view=self.view)
return _r
except:
return exceptions.html_error_template().render(full=True)
elif self.download.type == self.DOWNLOAD_TYPE_FILE:
# file download
if self.download.file is None or os.path.isfile(self.download.file) is False:
self.log.error('Could not find files to download. - path=%s' % self.download.file)
raise web.internalerror()
web.header('Content-Type', 'Content-type: application/octet-stream', True)
fp = open(self.download.file , "rb")
try:
_r = fp.read()
finally:
fp.close()
if self.download.once is True and os.path.isfile(self.download.file) is True:
os.unlink(self.download.file)
return _r
elif self.download.type == self.DOWNLOAD_TYPE_STREAM:
# file stream download!!
if self.download.stream is None:
self.log.error("Data stream has not been set.")
raise web.internalerror("Execution errors")
return self.download.stream
else:
# Illegal Error.
self.log.error('Was specified assuming no output type. - type=%d' % self.download.type)
raise web.internalerror()
def httpdate(date):
return web.httpdate(date)
def httpdate(date):
return web.httpdate(date)
def _post(self, f):
"""<comment-ja>
HTTP Method別処理を実行した後の処理を行います。
1. HTTP Responseコード 4xx or 5xx についての処理
2. テンプレート処理
3. HTTP Headerをセット
@param f: 実行結果
@type f: bool or web.HTTPError
@return: HTTP Response
</comment-ja>
<comment-en>
TODO: English Comment
</comment-en>
"""
try: # default view set.
self.view.me = self.me
if self.is_standalone() is True:
self.view.standalone = self.input.standalone
except AttributeError:
pass
# Content-Type
# TODO
# "Resource interpreted as script but transferred with MIME type text/plain."
# if self.__template__.media == 'part':
# web.header('Content-Type', 'text/html; charset=utf-8', True)
# elif self.__template__.media == 'input':
# web.header('Content-Type', 'text/html; charset=utf-8', True)
# elif self.__template__.media == 'html':
# web.header('Content-Type', 'text/html; charset=utf-8', True)
# elif self.__template__.media == 'json':
# web.header('Content-Type', 'application/json; charset=utf-8', True)
# elif self.__template__.media == 'xml':`
# web.header('Content-Type', 'text/xml; charset=utf-8', True)
# elif self.__template__.media == 'gif':
# web.header('Content-Type', 'Content-type: image/gif', True)
# elif self.__template__.media == 'png':
# web.header('Content-Type', 'Content-type: image/png', True)
# elif self.__template__.media == 'jpg':
# web.header('Content-Type', 'Content-type: image/jpeg', True)
# elif self.__template__.media == 'jpeg':
# web.header('Content-Type', 'Content-type: image/jpeg', True)
# elif self.__template__.media == 'ico':
# web.header('Content-Type', 'Content-type: image/x-icon', True)
# elif self.__template__.media == 'css':
# web.header('Content-Type', 'Content-type: text/css; charset=utf-8', True)
# elif self.__template__.media == 'js':
# web.header('Content-Type', 'Content-type: text/javascript; charset=utf-8', True)
# elif self.__template__.media == 'jar':
# web.header('Content-Type', 'Content-type: application/java-archiver', True)
# else:
# web.header('Content-Type', 'text/plain; charset=utf-8', True)
# HTTP Header - No Cache
now = datetime.now()
web.lastmodified(now)
web.httpdate(now)
# TODO
# web.expire(0)
# web.header('Expires', web.httpdate(datetime(1970,1,1)))
# web.header('Last-Modified', web.httpdate(datetime(1970,1,1)))
# web.header('ETag', 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
web.header("Cache-Control", "no-cache,private")
web.header("Pragma", "no-cache")
##
if self.download.type == OUTPUT_TYPE_NORMAL: # Nomal
if self.me is None:
self.view.USER_DATE_FORMAT = DEFAULT_LANGS[self.languages[0]]["DATE_FORMAT"]
else:
self.view.USER_DATE_FORMAT = DEFAULT_LANGS[self.me.languages]["DATE_FORMAT"]
if isinstance(f, web.HTTPError) is True:
self.logger.info("HTTP Response - %s Headers-->%s" % (f.__class__.__name__, web.ctx.headers))
raise f
if f is True:
path = "%s/%s.%s" % (self.__template__.dir, self.__template__.file, self.__template__.media)
else:
# if self.__template__.media in ERROR_MEDIA:
# path = 'error/error.%s' % self.__template__.media
# else:
# path = 'error/error.%s' % DEFAULT_MEDIA
self.logger.info('"gadget" execution error - %s' % str(self.__class__))
raise web.internalerror("Execution errors")
self.logger.debug("lang=%s %s : template=%s" % (",".join(self.languages), str(self), path))
try:
_r = mako_render(self._, path, title=self._("Karesansui"), view=self.view)
return _r
except:
if web.wsgi._is_dev_mode() is True and os.environ.has_key("FCGI") is False:
return exceptions.html_error_template().render(full=True)
else:
self.logger.error('"mako render" execution error - path=%s' % path)
self.logger_trace.error(traceback.format_exc())
raise web.internalerror("Execution errors")
elif self.download.type == OUTPUT_TYPE_FILE: # file download
if self.download.file is None or os.path.isfile(self.download.file) is False:
self.logger.error("Could not find files to download. - path=%s" % self.download.file)
return web.internalerror()
web.header("Content-Type", "Content-type: image/png", True)
fp = open(self.download.file, "rb")
try:
_r = fp.read()
finally:
fp.close()
if self.download.once is True and os.path.isfile(self.download.file) is True:
os.unlink(self.download.file)
return _r
elif self.download.type == OUTPUT_TYPE_STREAM: # io stream download
if self.download.stream is None:
self.logger.error("Data stream has not been set.")
return self.download.stream
else:
self.logger.error("Was specified assuming no output type. - type=%d" % self.download.type)
raise web.internalerror()
class Service(object):
"""Cache service
This service implements the content delivering caching mechanism.
All requests handled by this service produces cache manipulation
on the Google Datastore (with a Memcache top layer).
- origin: Set the origin url (type: String; mandatory)
- forceTTL: Does not honor CacheControl value, replacing cache TTL by this value (type: Integer)
- maxTTL: When the CacheControl value is honored (forceTTL not set), the cache TTL
value cannot be greater than this value (otherwise, it is overriden). (type: Integer)
- ignoreQueryString: Tell if the trailing HTTP query string is not taken into account
to generate the cache object key in Datastore. In other terms, if this value is set
to True, /url/path/obj.js?v=42 and /url/path/obj.js referer to the same object. (type: Boolean; default: False)
- forwardPost: If it is True, POST requests will be forwarded, instead of being redirected (type: Boolean; default: True)
- allowFlushFrom: Specify client IP which are allowed to make DELETE requests to flush
cache object explicitly. (type: List)
- disableIfModifiedSince: Disable IMS request during object refresh. (type: Boolean; default: False)
- prefetch: (EXPERIMENTAL) Prefetch content from HTML or other pages. (type: Boolean; default: False)
- headerBlacklist: Set list of origin headers to remove. (type: List)
"""
origin = None
forceTTL = None
maxTTL = None
ignoreQueryString = False
forwardPost = True
# Set your client IP address to authorize cache entry deletion
allowFlushFrom = ['127.0.0.1']
prefetch = False
disableIfModifiedSince = False
# undocumented: remove querystring before forwarding
# the request to the origin
stripForwardedQueryString = False
# These headers won't be forwarded
headerBlacklist = []
_headerBlacklist = [
'date',
'last-modified',
'via',
'expires',
'etag'
]
def __init__(self):
self.name = self.__class__.__name__
self.cache = type(self.name, (Cache,), {})
# Register the dynamic object globally
# if not, pickle cannot find it for serialization
globals()[self.name] = self.cache
def GET(self, request, _beforeWriteCache=None):
if self.ignoreQueryString is False:
request += web.ctx.query
try:
cache = self.readCache(request)
if cache is None:
cache = self.writeCache(request, _beforeWriteCache=_beforeWriteCache)
except runtime.DeadlineExceededError:
raise web.SeeOther(self.origin + request, absolute=True)
except CacheExpired, cache:
cache = self.writeCache(request, cache=cache(), _beforeWriteCache=_beforeWriteCache)
if not web.modified(cache.lastModified):
raise web.HTTPError(status='304 Not Modified')
web.header('Expires', web.httpdate(cache.expires))
for h in cache.headers:
print h
return cache.data
def _post(self, f):
"""<comment-ja>
HTTP Method別処理を実行した後の処理を行います。
1. HTTP Responseコード 4xx or 5xx についての処理
2. テンプレート処理
3. HTTP Headerをセット
@param f: 実行結果
@type f: bool or web.HTTPError
@return: HTTP Response
</comment-ja>
<comment-en>
TODO: English Comment
</comment-en>
"""
try: # default view set.
self.view.me = self.me
if self.is_standalone() is True:
self.view.standalone = self.input.standalone
except AttributeError:
pass
# Content-Type
# TODO
# "Resource interpreted as script but transferred with MIME type text/plain."
#if self.__template__.media == 'part':
# web.header('Content-Type', 'text/html; charset=utf-8', True)
#elif self.__template__.media == 'input':
# web.header('Content-Type', 'text/html; charset=utf-8', True)
#elif self.__template__.media == 'html':
# web.header('Content-Type', 'text/html; charset=utf-8', True)
#elif self.__template__.media == 'json':
# web.header('Content-Type', 'application/json; charset=utf-8', True)
#elif self.__template__.media == 'xml':`
# web.header('Content-Type', 'text/xml; charset=utf-8', True)
#elif self.__template__.media == 'gif':
# web.header('Content-Type', 'Content-type: image/gif', True)
#elif self.__template__.media == 'png':
# web.header('Content-Type', 'Content-type: image/png', True)
#elif self.__template__.media == 'jpg':
# web.header('Content-Type', 'Content-type: image/jpeg', True)
#elif self.__template__.media == 'jpeg':
# web.header('Content-Type', 'Content-type: image/jpeg', True)
#elif self.__template__.media == 'ico':
# web.header('Content-Type', 'Content-type: image/x-icon', True)
#elif self.__template__.media == 'css':
# web.header('Content-Type', 'Content-type: text/css; charset=utf-8', True)
#elif self.__template__.media == 'js':
# web.header('Content-Type', 'Content-type: text/javascript; charset=utf-8', True)
#elif self.__template__.media == 'jar':
# web.header('Content-Type', 'Content-type: application/java-archiver', True)
#else:
# web.header('Content-Type', 'text/plain; charset=utf-8', True)
# HTTP Header - No Cache
now = datetime.now()
web.lastmodified(now)
web.httpdate(now)
# TODO
#web.expire(0)
#web.header('Expires', web.httpdate(datetime(1970,1,1)))
#web.header('Last-Modified', web.httpdate(datetime(1970,1,1)))
#web.header('ETag', 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
web.header('Cache-Control', 'no-cache,private')
web.header('Pragma', 'no-cache')
##
if self.download.type == OUTPUT_TYPE_NORMAL: # Nomal
if self.me is None:
self.view.USER_DATE_FORMAT = DEFAULT_LANGS[
self.languages[0]]['DATE_FORMAT']
else:
self.view.USER_DATE_FORMAT = DEFAULT_LANGS[
self.me.languages]['DATE_FORMAT']
if isinstance(f, web.HTTPError) is True:
self.logger.info('HTTP Response - %s Headers-->%s' %
(f.__class__.__name__, web.ctx.headers))
raise f
if f is True:
path = '%s/%s.%s' % (
self.__template__.dir,
self.__template__.file,
self.__template__.media,
)
else:
#if self.__template__.media in ERROR_MEDIA:
# path = 'error/error.%s' % self.__template__.media
#else:
# path = 'error/error.%s' % DEFAULT_MEDIA
self.logger.info('"gadget" execution error - %s' %
str(self.__class__))
raise web.internalerror("Execution errors")
self.logger.debug('lang=%s %s : template=%s' \
% (','.join(self.languages), str(self), path))
try:
_r = mako_render(self._,
path,
title=self._('Karesansui'),
view=self.view)
return _r
except:
if web.wsgi._is_dev_mode() is True and os.environ.has_key(
'FCGI') is False:
return exceptions.html_error_template().render(full=True)
else:
self.logger.error(
'"mako render" execution error - path=%s' % path)
self.logger_trace.error(traceback.format_exc())
raise web.internalerror("Execution errors")
elif self.download.type == OUTPUT_TYPE_FILE: # file download
if self.download.file is None or os.path.isfile(
self.download.file) is False:
self.logger.error(
'Could not find files to download. - path=%s' %
self.download.file)
return web.internalerror()
web.header('Content-Type', 'Content-type: image/png', True)
fp = open(self.download.file, "rb")
try:
_r = fp.read()
finally:
fp.close()
if self.download.once is True and os.path.isfile(
self.download.file) is True:
os.unlink(self.download.file)
return _r
elif self.download.type == OUTPUT_TYPE_STREAM: # io stream download
if self.download.stream is None:
self.logger.error("Data stream has not been set.")
return self.download.stream
else:
self.logger.error(
'Was specified assuming no output type. - type=%d' %
self.download.type)
raise web.internalerror()
