hydrus/include/HydrusServerResources.py

761 lines
44 KiB
Python

import HydrusConstants as HC
import HydrusExceptions
import HydrusFileHandling
import HydrusImageHandling
import HydrusNetwork
import HydrusPaths
import HydrusSerialisable
import os
import time
import traceback
from twisted.internet import reactor, defer
from twisted.internet.threads import deferToThread
from twisted.web.server import NOT_DONE_YET
from twisted.web.resource import Resource
from twisted.web.static import File as FileResource, NoRangeStaticProducer
import HydrusData
import HydrusGlobals as HG
def GenerateEris( service, domain ):
name = service.GetName()
service_type = service.GetServiceType()
welcome_text_1 = 'This is <b>' + name + '</b>,'
welcome_text_2 = 'a ' + HC.service_string_lookup[ service_type ] + '.'
welcome_text_3 = 'Software version ' + str( HC.SOFTWARE_VERSION )
welcome_text_4 = 'Network version ' + str( HC.NETWORK_VERSION )
if domain.IsLocal():
welcome_text_5 = 'It only responds to requests from localhost.'
else:
welcome_text_5 = 'It responds to requests from any host.'
return '''<html><head><title>''' + name + '''</title></head><body><pre>
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</pre></body></html>'''
def ParseFileArguments( path ):
HydrusImageHandling.ConvertToPngIfBmp( path )
hash = HydrusFileHandling.GetHashFromPath( path )
try:
( size, mime, width, height, duration, num_frames, num_words ) = HydrusFileHandling.GetFileInfo( path )
except HydrusExceptions.SizeException:
raise HydrusExceptions.ForbiddenException( 'File is of zero length!' )
except HydrusExceptions.MimeException:
raise HydrusExceptions.ForbiddenException( 'Filetype is not permitted!' )
except Exception as e:
raise HydrusExceptions.ForbiddenException( HydrusData.ToUnicode( e ) )
args = {}
args[ 'path' ] = path
args[ 'hash' ] = hash
args[ 'size' ] = size
args[ 'mime' ] = mime
if width is not None: args[ 'width' ] = width
if height is not None: args[ 'height' ] = height
if duration is not None: args[ 'duration' ] = duration
if num_frames is not None: args[ 'num_frames' ] = num_frames
if num_words is not None: args[ 'num_words' ] = num_words
if mime in HC.MIMES_WITH_THUMBNAILS:
try:
thumbnail = HydrusFileHandling.GenerateThumbnail( path )
except Exception as e:
tb = traceback.format_exc()
raise HydrusExceptions.ForbiddenException( 'Could not generate thumbnail from that file:' + os.linesep + tb )
args[ 'thumbnail' ] = thumbnail
return args
hydrus_favicon = FileResource( os.path.join( HC.STATIC_DIR, 'hydrus.ico' ), defaultType = 'image/x-icon' )
class HydrusDomain( object ):
def __init__( self, local_only ):
self._local_only = local_only
def CheckValid( self, client_ip ):
if self._local_only and client_ip != '127.0.0.1':
raise HydrusExceptions.ForbiddenException( 'Only local access allowed!' )
def IsLocal( self ):
return self._local_only
class HydrusResource( Resource ):
def __init__( self, service, domain ):
Resource.__init__( self )
self._service = service
self._service_key = self._service.GetServiceKey()
self._domain = domain
service_type = self._service.GetServiceType()
self._server_version_string = HC.service_string_lookup[ service_type ] + '/' + str( HC.NETWORK_VERSION )
def _callbackCheckRestrictions( self, request ):
self._domain.CheckValid( request.getClientIP() )
self._checkService( request )
self._checkUserAgent( request )
return request
def _checkService( self, request ):
if HG.server_busy:
raise HydrusExceptions.ServerBusyException( 'This server is busy, please try again later.' )
return request
def _checkUserAgent( self, request ):
request.is_hydrus_user_agent = False
if request.requestHeaders.hasHeader( 'User-Agent' ):
user_agent_texts = request.requestHeaders.getRawHeaders( 'User-Agent' )
user_agent_text = user_agent_texts[0]
try:
user_agents = user_agent_text.split( ' ' )
except: return # crazy user agent string, so just assume not a hydrus client
for user_agent in user_agents:
if '/' in user_agent:
( client, network_version ) = user_agent.split( '/', 1 )
if client == 'hydrus':
request.is_hydrus_user_agent = True
network_version = int( network_version )
if network_version == HC.NETWORK_VERSION: return
else:
if network_version < HC.NETWORK_VERSION: message = 'Your client is out of date; please download the latest release.'
else: message = 'This server is out of date; please ask its admin to update to the latest release.'
raise HydrusExceptions.NetworkVersionException( 'Network version mismatch! This server\'s network version is ' + str( HC.NETWORK_VERSION ) + ', whereas your client\'s is ' + str( network_version ) + '! ' + message )
def _callbackParseGETArgs( self, request ):
hydrus_args = HydrusNetwork.ParseGETArgs( request.args )
request.hydrus_args = hydrus_args
return request
def _callbackParsePOSTArgs( self, request ):
request.content.seek( 0 )
if not request.requestHeaders.hasHeader( 'Content-Type' ):
hydrus_args = {}
else:
content_types = request.requestHeaders.getRawHeaders( 'Content-Type' )
content_type = content_types[0]
try:
mime = HC.mime_enum_lookup[ content_type ]
except:
raise HydrusExceptions.ForbiddenException( 'Did not recognise Content-Type header!' )
if mime == HC.APPLICATION_JSON:
json_string = request.content.read()
request.hydrus_request_data_usage += len( json_string )
hydrus_args = HydrusNetwork.ParseBodyString( json_string )
else:
( os_file_handle, temp_path ) = HydrusPaths.GetTempPath()
request.temp_file_info = ( os_file_handle, temp_path )
with open( temp_path, 'wb' ) as f:
for block in HydrusPaths.ReadFileLikeAsBlocks( request.content ):
f.write( block )
request.hydrus_request_data_usage += len( block )
hydrus_args = ParseFileArguments( temp_path )
request.hydrus_args = hydrus_args
return request
def _callbackRenderResponseContext( self, request ):
self._CleanUpTempFile( request )
response_context = request.hydrus_response_context
status_code = response_context.GetStatusCode()
request.setResponseCode( status_code )
for ( k, v, kwargs ) in response_context.GetCookies():
request.addCookie( k, v, **kwargs )
do_finish = True
if response_context.HasPath():
path = response_context.GetPath()
size = os.path.getsize( path )
mime = response_context.GetMime()
if mime == HC.APPLICATION_UNKNOWN:
mime = HydrusFileHandling.GetMime( path )
content_type = HC.mime_string_lookup[ mime ]
content_length = size
( base, filename ) = os.path.split( path )
content_disposition = 'inline; filename="' + filename + '"'
# can't be unicode!
request.setHeader( 'Content-Type', str( content_type ) )
request.setHeader( 'Content-Length', str( content_length ) )
request.setHeader( 'Content-Disposition', str( content_disposition ) )
request.setHeader( 'Expires', time.strftime( '%a, %d %b %Y %H:%M:%S GMT', time.gmtime( time.time() + 86400 * 365 ) ) )
request.setHeader( 'Cache-Control', str( 86400 * 365 ) )
fileObject = open( path, 'rb' )
producer = NoRangeStaticProducer( request, fileObject )
producer.start()
do_finish = False
elif response_context.HasBody():
mime = response_context.GetMime()
body = response_context.GetBody()
content_type = HC.mime_string_lookup[ mime ]
content_length = len( body )
content_disposition = 'inline'
request.setHeader( 'Content-Type', content_type )
request.setHeader( 'Content-Length', str( content_length ) )
request.setHeader( 'Content-Disposition', content_disposition )
request.write( HydrusData.ToByteString( body ) )
else:
content_length = 0
request.setHeader( 'Content-Length', str( content_length ) )
request.hydrus_request_data_usage += content_length
self._recordDataUsage( request )
if do_finish:
request.finish()
def _callbackDoGETJob( self, request ):
def wrap_thread_result( response_context ):
request.hydrus_response_context = response_context
return request
d = deferToThread( self._threadDoGETJob, request )
d.addCallback( wrap_thread_result )
return d
def _callbackDoPOSTJob( self, request ):
def wrap_thread_result( response_context ):
request.hydrus_response_context = response_context
return request
d = deferToThread( self._threadDoPOSTJob, request )
d.addCallback( wrap_thread_result )
return d
def _errbackDisconnected( self, failure, request_deferred ):
request_deferred.cancel()
def _errbackHandleEmergencyError( self, failure, request ):
try: self._CleanUpTempFile( request )
except: pass
try: HydrusData.DebugPrint( failure.getTraceback() )
except: pass
try: request.write( failure.getTraceback() )
except: pass
try: request.finish()
except: pass
def _errbackHandleProcessingError( self, failure, request ):
self._CleanUpTempFile( request )
default_mime = HC.TEXT_HTML
default_encoding = HydrusData.ToByteString
if failure.type == KeyError:
response_context = ResponseContext( 403, mime = default_mime, body = default_encoding( 'It appears one or more parameters required for that request were missing:' + os.linesep + failure.getTraceback() ) )
elif failure.type == HydrusExceptions.BandwidthException:
response_context = ResponseContext( 509, mime = default_mime, body = default_encoding( failure.value ) )
elif failure.type == HydrusExceptions.PermissionException:
response_context = ResponseContext( 401, mime = default_mime, body = default_encoding( failure.value ) )
elif failure.type == HydrusExceptions.ForbiddenException:
response_context = ResponseContext( 403, mime = default_mime, body = default_encoding( failure.value ) )
elif failure.type in ( HydrusExceptions.NotFoundException, HydrusExceptions.DataMissing ):
response_context = ResponseContext( 404, mime = default_mime, body = default_encoding( failure.value ) )
elif failure.type == HydrusExceptions.NetworkVersionException:
response_context = ResponseContext( 426, mime = default_mime, body = default_encoding( failure.value ) )
elif failure.type == HydrusExceptions.ServerBusyException:
response_context = ResponseContext( 503, mime = default_mime, body = default_encoding( failure.value ) )
elif failure.type == HydrusExceptions.SessionException:
response_context = ResponseContext( 419, mime = default_mime, body = default_encoding( failure.value ) )
else:
HydrusData.DebugPrint( failure.getTraceback() )
response_context = ResponseContext( 500, mime = default_mime, body = default_encoding( 'The repository encountered an error it could not handle! Here is a dump of what happened, which will also be written to your client.log file. If it persists, please forward it to hydrus.admin@gmail.com:' + os.linesep * 2 + failure.getTraceback() ) )
request.hydrus_response_context = response_context
return request
def _parseAccessKey( self, request ):
if not request.requestHeaders.hasHeader( 'Hydrus-Key' ):
raise HydrusExceptions.PermissionException( 'No hydrus key header found!' )
hex_keys = request.requestHeaders.getRawHeaders( 'Hydrus-Key' )
hex_key = hex_keys[0]
try:
access_key = hex_key.decode( 'hex' )
except:
raise HydrusExceptions.ForbiddenException( 'Could not parse the hydrus key!' )
return access_key
def _recordDataUsage( self, request ):
num_bytes = request.hydrus_request_data_usage
self._service.RequestMade( num_bytes )
HG.controller.RequestMade( num_bytes )
def _threadDoGETJob( self, request ): raise HydrusExceptions.NotFoundException( 'This service does not support that request!' )
def _threadDoPOSTJob( self, request ): raise HydrusExceptions.NotFoundException( 'This service does not support that request!' )
def _CleanUpTempFile( self, request ):
if hasattr( request, 'temp_file_info' ):
( os_file_handle, temp_path ) = request.temp_file_info
HydrusPaths.CleanUpTempPath( os_file_handle, temp_path )
del request.temp_file_info
def render_GET( self, request ):
request.setHeader( 'Server', self._server_version_string )
d = defer.Deferred()
d.addCallback( self._callbackCheckRestrictions )
d.addCallback( self._callbackParseGETArgs )
d.addCallback( self._callbackDoGETJob )
d.addErrback( self._errbackHandleProcessingError, request )
d.addCallback( self._callbackRenderResponseContext )
d.addErrback( self._errbackHandleEmergencyError, request )
reactor.callLater( 0, d.callback, request )
request.notifyFinish().addErrback( self._errbackDisconnected, d )
return NOT_DONE_YET
def render_POST( self, request ):
request.setHeader( 'Server', self._server_version_string )
d = defer.Deferred()
d.addCallback( self._callbackCheckRestrictions )
d.addCallback( self._callbackParsePOSTArgs )
d.addCallback( self._callbackDoPOSTJob )
d.addErrback( self._errbackHandleProcessingError, request )
d.addCallback( self._callbackRenderResponseContext )
d.addErrback( self._errbackHandleEmergencyError, request )
reactor.callLater( 0, d.callback, request )
request.notifyFinish().addErrback( self._errbackDisconnected, d )
return NOT_DONE_YET
class HydrusResourceWelcome( HydrusResource ):
def _threadDoGETJob( self, request ):
body = GenerateEris( self._service, self._domain )
response_context = ResponseContext( 200, mime = HC.TEXT_HTML, body = body )
return response_context
class ResponseContext( object ):
def __init__( self, status_code, mime = HC.APPLICATION_JSON, body = None, path = None, cookies = None ):
if isinstance( body, HydrusSerialisable.SerialisableBase ):
body = body.DumpToNetworkString()
if cookies is None:
cookies = []
self._status_code = status_code
self._mime = mime
self._body = body
self._path = path
self._cookies = cookies
def GetBody( self ):
return self._body
def GetCookies( self ): return self._cookies
def GetLength( self ): return len( self._body )
def GetMime( self ): return self._mime
def GetPath( self ): return self._path
def GetStatusCode( self ): return self._status_code
def HasBody( self ): return self._body is not None
def HasPath( self ): return self._path is not None