__filename__ = "daemon.py" __author__ = "Bob Mottram" __license__ = "AGPL3+" __version__ = "0.0.1" __maintainer__ = "Bob Mottram" __email__ = "bob@freedombone.net" __status__ = "Production" from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer #import socketserver import json import time from pprint import pprint from session import createSession from webfinger import webfingerMeta from webfinger import webfingerLookup from webfinger import webfingerHandle from person import personLookup from person import personBoxJson from posts import outboxMessageCreateWrap from posts import savePostToBox from inbox import inboxPermittedMessage from inbox import inboxMessageHasParams from inbox import runInboxQueue from inbox import savePostToInboxQueue from follow import getFollowingFeed from auth import authorize from threads import threadWithTrace import os import sys # Avoid giant messages maxMessageLength=5000 # maximum number of posts to list in outbox feed maxPostsInFeed=20 # number of follows/followers per page followsPerPage=12 def readFollowList(filename: str): """Returns a list of ActivityPub addresses to follow """ followlist=[] if not os.path.isfile(filename): return followlist followUsers = open(filename, "r") for u in followUsers: if u not in followlist: nickname,domain = parseHandle(u) if nickname: followlist.append(nickname+'@'+domain) followUsers.close() return followlist class PubServer(BaseHTTPRequestHandler): def _set_headers(self,fileFormat: str) -> None: self.send_response(200) self.send_header('Content-type', fileFormat) self.end_headers() def _404(self) -> None: self.send_response(404) self.send_header('Content-Type', 'text/html; charset=utf-8') self.end_headers() self.wfile.write("

404 Not Found

".encode('utf-8')) def _webfinger(self) -> bool: if not self.path.startswith('/.well-known'): return False if self.server.debug: print('DEBUG: WEBFINGER well-known') if self.server.debug: print('DEBUG: WEBFINGER host-meta') if self.path.startswith('/.well-known/host-meta'): wfResult=webfingerMeta() if wfResult: self._set_headers('application/xrd+xml') self.wfile.write(wfResult.encode('utf-8')) return if self.server.debug: print('DEBUG: WEBFINGER lookup '+self.path+' '+str(self.server.baseDir)) wfResult=webfingerLookup(self.path,self.server.baseDir) if wfResult: self._set_headers('application/jrd+json') self.wfile.write(json.dumps(wfResult).encode('utf-8')) else: if self.server.debug: print('DEBUG: WEBFINGER lookup 404 '+self.path) self._404() return True def _permittedDir(self,path: str) -> bool: """These are special paths which should not be accessible directly via GET or POST """ if path.startswith('/wfendpoints') or \ path.startswith('/keys') or \ path.startswith('/accounts'): return False return True def _postToOutbox(self,messageJson: {}) -> bool: """post is received by the outbox Client to server message post https://www.w3.org/TR/activitypub/#client-to-server-outbox-delivery """ if not messageJson.get('type'): if self.server.debug: print('DEBUG: POST to outbox has no "type" parameter') return False if not messageJson.get('object') and messageJson.get('content'): if messageJson['type']!='Create': # https://www.w3.org/TR/activitypub/#object-without-create if self.server.debug: print('DEBUG: POST to outbox - adding Create wrapper') messageJson= \ outboxMessageCreateWrap(self.server.httpPrefix, \ self.postToNickname, \ self.server.domain,messageJson) if messageJson['type']=='Create': if not (messageJson.get('id') and \ messageJson.get('type') and \ messageJson.get('actor') and \ messageJson.get('object') and \ messageJson.get('atomUri') and \ messageJson.get('to')): if self.server.debug: print('DEBUG: POST to outbox - Create does not have the required parameters') return False # https://www.w3.org/TR/activitypub/#create-activity-outbox messageJson['object']['attributedTo']=messageJson['actor'] permittedOutboxTypes=['Create','Announce','Like','Follow','Undo','Update','Add','Remove','Block','Delete'] if messageJson['type'] not in permittedOutboxTypes: if self.server.debug: print('DEBUG: POST to outbox - '+messageJson['type']+' is not a permitted activity type') return False if messageJson.get('id'): postId=messageJson['id'] else: postId=None savePostToBox(self.server.baseDir,postId,self.postToNickname,self.server.domain,messageJson,'outbox') return True def _updateInboxQueue(self,nickname: str,messageJson: {}) -> bool: """Update the inbox queue """ cacheFilename = \ savePostToInboxQueue(self.server.baseDir, \ self.server.httpPrefix, \ nickname, \ self.server.domain, \ messageJson, self.headers['host'], self.headers['signature']) if cacheFilename: if cacheFilename not in self.server.inboxQueue: self.server.inboxQueue.append(cacheFilename) self.send_response(201) self.end_headers() self.server.POSTbusy=False return True return False def do_GET(self): if self.server.debug: print('DEBUG: GET from '+self.server.baseDir+' path: '+self.path+' busy: '+str(self.server.GETbusy)) if self.server.GETbusy: currTimeGET=int(time.time()) if currTimeGET-self.server.lastGET<10: if self.server.debug: print('DEBUG: GET Busy') self.send_response(429) self.end_headers() return self.server.lastGET=currTimeGET self.server.GETbusy=True if not self._permittedDir(self.path): if self.server.debug: print('DEBUG: GET Not permitted') self._404() self.server.GETbusy=False return # get webfinger endpoint for a person if self._webfinger(): self.server.GETbusy=False return # get the inbox for a given person if self.path.endswith('/inbox'): if '/users/' in self.path: if self.headers.get('Authorization'): if authorize(self.server.baseDir,self.path, \ self.headers['Authorization'], \ self.server.debug): inboxFeed=personBoxJson(self.server.baseDir, \ self.server.domain, \ self.server.port, \ self.path, \ self.server.httpPrefix, \ maxPostsInFeed, 'inbox') if inboxFeed: self._set_headers('application/json') self.wfile.write(json.dumps(inboxFeed).encode('utf-8')) self.server.GETbusy=False return else: if self.server.debug: print('DEBUG: '+nickname+' was not authorized to access '+self.path) if self.server.debug: print('DEBUG: GET access to inbox is unauthorized') self.send_response(405) self.end_headers() self.server.POSTbusy=False return # get outbox feed for a person outboxFeed=personBoxJson(self.server.baseDir,self.server.domain, \ self.server.port,self.path, \ self.server.httpPrefix, \ maxPostsInFeed, 'outbox') if outboxFeed: self._set_headers('application/json') self.wfile.write(json.dumps(outboxFeed).encode('utf-8')) self.server.GETbusy=False return following=getFollowingFeed(self.server.baseDir,self.server.domain, \ self.server.port,self.path, \ self.server.httpPrefix,followsPerPage) if following: self._set_headers('application/json') self.wfile.write(json.dumps(following).encode('utf-8')) self.server.GETbusy=False return followers=getFollowingFeed(self.server.baseDir,self.server.domain, \ self.server.port,self.path, \ self.server.httpPrefix,followsPerPage,'followers') if followers: self._set_headers('application/json') self.wfile.write(json.dumps(followers).encode('utf-8')) self.server.GETbusy=False return # look up a person print('************personLookup start '+self.server.domain+' '+self.path+' '+self.server.baseDir) getPerson = personLookup(self.server.domain,self.path, \ self.server.baseDir) print('************personLookup end '+str(getPerson)) if getPerson: self._set_headers('application/json') self.wfile.write(json.dumps(getPerson).encode('utf-8')) self.server.GETbusy=False return # check that a json file was requested if not self.path.endswith('.json'): if self.server.debug: print('DEBUG: GET Not json: '+self.path+' '+self.server.baseDir) self._404() self.server.GETbusy=False return # check that the file exists filename=self.server.baseDir+self.path if os.path.isfile(filename): self._set_headers('application/json') with open(filename, 'r', encoding='utf-8') as File: content = File.read() contentJson=json.loads(content) self.wfile.write(json.dumps(contentJson).encode('utf-8')) else: if self.server.debug: print('DEBUG: GET Unknown file') self._404() self.server.GETbusy=False def do_HEAD(self): self._set_headers('application/json') def do_POST(self): if self.server.debug: print('DEBUG: POST to from '+self.server.baseDir+' path: '+self.path+' busy: '+str(self.server.POSTbusy)) if self.server.POSTbusy: currTimePOST=int(time.time()) if currTimePOST-self.server.lastPOST<10: self.send_response(429) self.end_headers() return self.server.lastPOST=currTimePOST self.server.POSTbusy=True if not self.headers.get('Content-type'): print('Content-type header missing') self.send_response(400) self.end_headers() self.server.POSTbusy=False return # refuse to receive non-json content if self.headers['Content-type'] != 'application/json': print("POST is not json: "+self.headers['Content-type']) self.send_response(400) self.end_headers() self.server.POSTbusy=False return # remove any trailing slashes from the path self.path=self.path.replace('/outbox/','/outbox').replace('/inbox/','/inbox').replace('/sharedInbox/','/sharedInbox') # if this is a POST to teh outbox then check authentication self.outboxAuthenticated=False self.postToNickname=None if self.path.endswith('/outbox'): if '/users/' in self.path: if self.headers.get('Authorization'): if authorize(self.server.baseDir,self.path,self.headers['Authorization'],self.server.debug): self.outboxAuthenticated=True pathUsersSection=path.split('/users/')[1] self.postToNickname=pathUsersSection.split('/')[0] if not self.outboxAuthenticated: self.send_response(405) self.end_headers() self.server.POSTbusy=False return # check that the post is to an expected path if not (self.path.endswith('/outbox') or \ self.path.endswith('/inbox') or \ self.path=='/sharedInbox'): print('Attempt to POST to invalid path '+self.path) self.send_response(400) self.end_headers() self.server.POSTbusy=False return # read the message and convert it into a python dictionary length = int(self.headers['Content-length']) if self.server.debug: print('DEBUG: content-length: '+str(length)) if length>maxMessageLength: self.send_response(400) self.end_headers() self.server.POSTbusy=False return if self.server.debug: print('DEBUG: Reading message') messageBytes=self.rfile.read(length) messageJson = json.loads(messageBytes) # https://www.w3.org/TR/activitypub/#object-without-create if self.outboxAuthenticated: if self._postToOutbox(messageJson): self.send_header('Location',messageJson['object']['atomUri']) self.send_response(201) self.end_headers() self.server.POSTbusy=False return else: self.send_response(403) self.end_headers() self.server.POSTbusy=False return # check the necessary properties are available if self.server.debug: print('DEBUG: Check message has params') if self.path.endswith('/inbox') or self.path=='/sharedInbox': if not inboxMessageHasParams(messageJson): self.send_response(403) self.end_headers() self.server.POSTbusy=False return if not inboxPermittedMessage(self.server.domain,messageJson,self.server.federationList): if self.server.debug: # https://www.youtube.com/watch?v=K3PrSj9XEu4 print('DEBUG: Ah Ah Ah') self.send_response(403) self.end_headers() self.server.POSTbusy=False return if self.server.debug: pprint(messageJson) if not self.headers.get('signature'): if 'keyId=' not in self.headers['signature']: if self.server.debug: print('DEBUG: POST to inbox has no keyId in header signature parameter') self.send_response(403) self.end_headers() self.server.POSTbusy=False return if self.server.debug: print('DEBUG: POST saving to inbox cache') if '/users/' in self.path: pathUsersSection=self.path.split('/users/')[1] if '/' not in pathUsersSection: if self.server.debug: print('DEBUG: This is not a users endpoint') else: self.postToNickname=pathUsersSection.split('/')[0] if self.postToNickname: if self._updateInboxQueue(self.postToNickname,messageJson): return self.send_response(403) self.end_headers() self.server.POSTbusy=False return else: if self.path == '/sharedInbox': print('DEBUG: POST to shared inbox') if self._updateInboxQueue('sharedinbox',messageJson): return self.send_response(200) self.end_headers() self.server.POSTbusy=False def runDaemon(baseDir: str,domain: str,port=80,httpPrefix='https',fedList=[],useTor=False,debug=False) -> None: if len(domain)==0: domain='localhost' if '.' not in domain: if domain != 'localhost': print('Invalid domain: ' + domain) return serverAddress = ('', port) httpd = ThreadingHTTPServer(serverAddress, PubServer) httpd.domain=domain httpd.port=port httpd.httpPrefix=httpPrefix httpd.debug=debug httpd.federationList=fedList.copy() httpd.baseDir=baseDir httpd.personCache={} httpd.cachedWebfingers={} httpd.useTor=useTor httpd.session = None httpd.sessionLastUpdate=0 httpd.lastGET=0 httpd.lastPOST=0 httpd.GETbusy=False httpd.POSTbusy=False httpd.receivedMessage=False httpd.inboxQueue=[] print('Running ActivityPub daemon on ' + domain + ' port ' + str(port)) httpd.thrInboxQueue=threadWithTrace(target=runInboxQueue,args=(baseDir,httpPrefix,httpd.personCache,httpd.inboxQueue,domain,port,useTor,httpd.federationList,debug),daemon=True) httpd.thrInboxQueue.start() httpd.serve_forever()