forked from indymedia/epicyon
444 lines
18 KiB
Python
444 lines
18 KiB
Python
__filename__ = "daemon.py"
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__author__ = "Bob Mottram"
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__license__ = "AGPL3+"
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__version__ = "0.0.1"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@freedombone.net"
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__status__ = "Production"
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from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
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#import socketserver
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import json
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import time
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from pprint import pprint
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from session import createSession
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from webfinger import webfingerMeta
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from webfinger import webfingerLookup
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from webfinger import webfingerHandle
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from person import personLookup
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from person import personBoxJson
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from posts import outboxMessageCreateWrap
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from posts import savePostToBox
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from inbox import inboxPermittedMessage
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from inbox import inboxMessageHasParams
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from inbox import runInboxQueue
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from inbox import savePostToInboxQueue
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from follow import getFollowingFeed
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from auth import authorize
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from threads import threadWithTrace
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import os
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import sys
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# Avoid giant messages
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maxMessageLength=5000
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# maximum number of posts to list in outbox feed
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maxPostsInFeed=20
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# number of follows/followers per page
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followsPerPage=12
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def readFollowList(filename: str):
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"""Returns a list of ActivityPub addresses to follow
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"""
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followlist=[]
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if not os.path.isfile(filename):
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return followlist
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followUsers = open(filename, "r")
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for u in followUsers:
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if u not in followlist:
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nickname,domain = parseHandle(u)
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if nickname:
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followlist.append(nickname+'@'+domain)
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followUsers.close()
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return followlist
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class PubServer(BaseHTTPRequestHandler):
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def _set_headers(self,fileFormat: str) -> None:
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self.send_response(200)
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self.send_header('Content-type', fileFormat)
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self.end_headers()
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def _404(self) -> None:
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self.send_response(404)
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self.send_header('Content-Type', 'text/html; charset=utf-8')
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self.end_headers()
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self.wfile.write("<html><head></head><body><h1>404 Not Found</h1></body></html>".encode('utf-8'))
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def _webfinger(self) -> bool:
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if not self.path.startswith('/.well-known'):
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return False
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if self.server.debug:
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print('DEBUG: WEBFINGER well-known')
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if self.server.debug:
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print('DEBUG: WEBFINGER host-meta')
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if self.path.startswith('/.well-known/host-meta'):
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wfResult=webfingerMeta()
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if wfResult:
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self._set_headers('application/xrd+xml')
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self.wfile.write(wfResult.encode('utf-8'))
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return
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if self.server.debug:
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print('DEBUG: WEBFINGER lookup '+self.path+' '+str(self.server.baseDir))
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wfResult=webfingerLookup(self.path,self.server.baseDir)
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if wfResult:
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self._set_headers('application/jrd+json')
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self.wfile.write(json.dumps(wfResult).encode('utf-8'))
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else:
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if self.server.debug:
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print('DEBUG: WEBFINGER lookup 404 '+self.path)
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self._404()
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return True
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def _permittedDir(self,path: str) -> bool:
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"""These are special paths which should not be accessible
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directly via GET or POST
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"""
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if path.startswith('/wfendpoints') or \
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path.startswith('/keys') or \
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path.startswith('/accounts'):
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return False
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return True
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def _postToOutbox(messageJson: {}) -> bool:
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"""post is received by the outbox
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Client to server message post
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https://www.w3.org/TR/activitypub/#client-to-server-outbox-delivery
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"""
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if not messageJson.get('type'):
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if self.server.debug:
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print('DEBUG: POST to outbox has no "type" parameter')
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return False
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if not messageJson.get('object') and messageJson.get('content'):
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if messageJson['type']!='Create':
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# https://www.w3.org/TR/activitypub/#object-without-create
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if self.server.debug:
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print('DEBUG: POST to outbox - adding Create wrapper')
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messageJson= \
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outboxMessageCreateWrap(self.server.httpPrefix, \
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self.postToNickname, \
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self.server.domain,messageJson)
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if messageJson['type']=='Create':
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if not (messageJson.get('id') and \
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messageJson.get('type') and \
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messageJson.get('actor') and \
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messageJson.get('object') and \
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messageJson.get('atomUri') and \
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messageJson.get('to')):
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if self.server.debug:
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print('DEBUG: POST to outbox - Create does not have the required parameters')
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return False
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# https://www.w3.org/TR/activitypub/#create-activity-outbox
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messageJson['object']['attributedTo']=messageJson['actor']
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permittedOutboxTypes=['Create','Announce','Like','Follow','Undo','Update','Add','Remove','Block','Delete']
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if messageJson['type'] not in permittedOutboxTypes:
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if self.server.debug:
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print('DEBUG: POST to outbox - '+messageJson['type']+' is not a permitted activity type')
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return False
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if messageJson.get('id'):
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postId=messageJson['id']
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else:
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postId=None
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savePostToBox(self.server.baseDir,postId,self.postToNickname,self.server.domain,messageJson,'outbox')
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return True
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def do_GET(self):
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if self.server.debug:
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print('DEBUG: GET from '+self.server.baseDir+' path: '+self.path+' busy: '+str(self.server.GETbusy))
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if self.server.GETbusy:
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currTimeGET=int(time.time())
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if currTimeGET-self.server.lastGET<10:
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if self.server.debug:
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print('DEBUG: GET Busy')
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self.send_response(429)
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self.end_headers()
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return
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self.server.lastGET=currTimeGET
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self.server.GETbusy=True
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if not self._permittedDir(self.path):
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if self.server.debug:
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print('DEBUG: GET Not permitted')
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self._404()
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self.server.GETbusy=False
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return
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# get webfinger endpoint for a person
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if self._webfinger():
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self.server.GETbusy=False
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return
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# get the inbox for a given person
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if self.path.endswith('/inbox'):
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if '/users/' in self.path:
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if self.headers.get('Authorization'):
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if authorize(self.server.baseDir,self.path, \
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self.headers['Authorization'], \
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self.server.debug):
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inboxFeed=personBoxJson(self.server.baseDir, \
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self.server.domain, \
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self.server.port, \
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self.path, \
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self.server.httpPrefix, \
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maxPostsInFeed, 'inbox')
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if inboxFeed:
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self._set_headers('application/json')
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self.wfile.write(json.dumps(inboxFeed).encode('utf-8'))
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self.server.GETbusy=False
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return
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else:
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if self.server.debug:
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print('DEBUG: '+nickname+' was not authorized to access '+self.path)
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if self.server.debug:
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print('DEBUG: GET access to inbox is unauthorized')
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self.send_response(405)
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self.end_headers()
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self.server.POSTbusy=False
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return
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# get outbox feed for a person
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outboxFeed=personBoxJson(self.server.baseDir,self.server.domain, \
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self.server.port,self.path, \
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self.server.httpPrefix, \
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maxPostsInFeed, 'outbox')
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if outboxFeed:
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self._set_headers('application/json')
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self.wfile.write(json.dumps(outboxFeed).encode('utf-8'))
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self.server.GETbusy=False
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return
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following=getFollowingFeed(self.server.baseDir,self.server.domain, \
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self.server.port,self.path, \
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self.server.httpPrefix,followsPerPage)
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if following:
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self._set_headers('application/json')
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self.wfile.write(json.dumps(following).encode('utf-8'))
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self.server.GETbusy=False
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return
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followers=getFollowingFeed(self.server.baseDir,self.server.domain, \
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self.server.port,self.path, \
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self.server.httpPrefix,followsPerPage,'followers')
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if followers:
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self._set_headers('application/json')
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self.wfile.write(json.dumps(followers).encode('utf-8'))
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self.server.GETbusy=False
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return
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# look up a person
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print('************personLookup start '+self.server.domain+' '+self.path+' '+self.server.baseDir)
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getPerson = personLookup(self.server.domain,self.path, \
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self.server.baseDir)
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print('************personLookup end '+str(getPerson))
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if getPerson:
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self._set_headers('application/json')
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self.wfile.write(json.dumps(getPerson).encode('utf-8'))
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self.server.GETbusy=False
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return
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# check that a json file was requested
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if not self.path.endswith('.json'):
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if self.server.debug:
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print('DEBUG: GET Not json: '+self.path+' '+self.server.baseDir)
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self._404()
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self.server.GETbusy=False
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return
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# check that the file exists
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filename=self.server.baseDir+self.path
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if os.path.isfile(filename):
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self._set_headers('application/json')
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with open(filename, 'r', encoding='utf-8') as File:
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content = File.read()
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contentJson=json.loads(content)
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self.wfile.write(json.dumps(contentJson).encode('utf-8'))
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else:
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if self.server.debug:
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print('DEBUG: GET Unknown file')
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self._404()
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self.server.GETbusy=False
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def do_HEAD(self):
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self._set_headers('application/json')
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def do_POST(self):
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if self.server.debug:
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print('DEBUG: POST to from '+self.server.baseDir+' path: '+self.path+' busy: '+str(self.server.POSTbusy))
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if self.server.POSTbusy:
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currTimePOST=int(time.time())
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if currTimePOST-self.server.lastPOST<10:
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self.send_response(429)
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self.end_headers()
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return
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self.server.lastPOST=currTimePOST
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self.server.POSTbusy=True
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if not self.headers.get('Content-type'):
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print('Content-type header missing')
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self.send_response(400)
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self.end_headers()
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self.server.POSTbusy=False
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return
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# refuse to receive non-json content
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if self.headers['Content-type'] != 'application/json':
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print("POST is not json: "+self.headers['Content-type'])
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self.send_response(400)
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self.end_headers()
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self.server.POSTbusy=False
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return
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# remove any trailing slashes from the path
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self.path=self.path.replace('/outbox/','/outbox').replace('/inbox/','/inbox').replace('/sharedInbox/','/sharedInbox')
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# if this is a POST to teh outbox then check authentication
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self.outboxAuthenticated=False
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self.postToNickname=None
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if self.path.endswith('/outbox'):
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if '/users/' in self.path:
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if self.headers.get('Authorization'):
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if authorize(self.server.baseDir,self.path,self.headers['Authorization'],self.server.debug):
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self.outboxAuthenticated=True
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pathUsersSection=path.split('/users/')[1]
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self.postToNickname=pathUsersSection.split('/')[0]
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if not self.outboxAuthenticated:
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self.send_response(405)
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self.end_headers()
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self.server.POSTbusy=False
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return
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# check that the post is to an expected path
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if not (self.path.endswith('/outbox') or \
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self.path.endswith('/inbox') or \
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self.path=='/sharedInbox'):
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print('Attempt to POST to invalid path '+self.path)
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self.send_response(400)
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self.end_headers()
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self.server.POSTbusy=False
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return
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# read the message and convert it into a python dictionary
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length = int(self.headers['Content-length'])
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if self.server.debug:
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print('DEBUG: content-length: '+str(length))
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if length>maxMessageLength:
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self.send_response(400)
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self.end_headers()
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self.server.POSTbusy=False
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return
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if self.server.debug:
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print('DEBUG: Reading message')
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messageBytes=self.rfile.read(length)
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messageJson = json.loads(messageBytes)
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# https://www.w3.org/TR/activitypub/#object-without-create
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if self.outboxAuthenticated:
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if self._postToOutbox(messageJson):
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self.send_header('Location',messageJson['object']['atomUri'])
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self.send_response(201)
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self.end_headers()
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self.server.POSTbusy=False
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return
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else:
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self.send_response(403)
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self.end_headers()
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self.server.POSTbusy=False
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return
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# check the necessary properties are available
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if self.server.debug:
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print('DEBUG: Check message has params')
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if self.path.endswith('/inbox') or self.path=='/sharedInbox':
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if not inboxMessageHasParams(messageJson):
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self.send_response(403)
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self.end_headers()
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self.server.POSTbusy=False
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return
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if not inboxPermittedMessage(self.server.domain,messageJson,self.server.federationList):
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if self.server.debug:
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print('DEBUG: Ah Ah Ah')
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self.send_response(403)
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self.end_headers()
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self.server.POSTbusy=False
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return
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if self.server.debug:
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pprint(messageJson)
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if not self.headers.get('signature'):
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if 'keyId=' not in self.headers['signature']:
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if self.server.debug:
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print('DEBUG: POST to inbox has no keyId in header signature parameter')
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self.send_response(403)
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self.end_headers()
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self.server.POSTbusy=False
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return
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if self.server.debug:
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print('DEBUG: POST saving to inbox cache')
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if '/users/' in self.path:
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pathUsersSection=self.path.split('/users/')[1]
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if '/' not in pathUsersSection:
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if self.server.debug:
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print('DEBUG: This is not a users endpoint')
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else:
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self.postToNickname=pathUsersSection.split('/')[0]
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if self.postToNickname:
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cacheFilename = \
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savePostToInboxQueue(self.server.baseDir, \
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self.server.httpPrefix, \
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self.postToNickname, \
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self.server.domain, \
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messageJson,
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self.headers['host'],
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self.headers['signature'])
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if cacheFilename:
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if cacheFilename not in self.server.inboxQueue:
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self.server.inboxQueue.append(cacheFilename)
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self.send_response(201)
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self.end_headers()
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self.server.POSTbusy=False
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return
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self.send_response(403)
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self.end_headers()
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self.server.POSTbusy=False
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return
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else:
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print('DEBUG: POST to shared inbox')
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self.send_response(201)
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self.end_headers()
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self.server.POSTbusy=False
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return
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def runDaemon(baseDir: str,domain: str,port=80,httpPrefix='https',fedList=[],useTor=False,debug=False) -> None:
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if len(domain)==0:
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domain='localhost'
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if '.' not in domain:
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if domain != 'localhost':
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print('Invalid domain: ' + domain)
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return
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serverAddress = ('', port)
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httpd = ThreadingHTTPServer(serverAddress, PubServer)
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httpd.domain=domain
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httpd.port=port
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httpd.httpPrefix=httpPrefix
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httpd.debug=debug
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httpd.federationList=fedList.copy()
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httpd.baseDir=baseDir
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httpd.personCache={}
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httpd.cachedWebfingers={}
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httpd.useTor=useTor
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httpd.session = None
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httpd.sessionLastUpdate=0
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httpd.lastGET=0
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httpd.lastPOST=0
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httpd.GETbusy=False
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httpd.POSTbusy=False
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httpd.receivedMessage=False
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httpd.inboxQueue=[]
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print('Running ActivityPub daemon on ' + domain + ' port ' + str(port))
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httpd.thrInboxQueue=threadWithTrace(target=runInboxQueue,args=(baseDir,httpPrefix,httpd.personCache,httpd.inboxQueue,domain,port,useTor,httpd.federationList,debug),daemon=True)
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httpd.thrInboxQueue.start()
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httpd.serve_forever()
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