api.py

   1 import uvicorn
   2 from fastapi import FastAPI, Request, HTTPException, responses
   3 import sqlite3
   4 from hashlib import sha256
   5 from fastapi.templating import Jinja2Templates
   6 from requests import get
   7 from json import loads
   8 from re import sub
   9
  10 with open("config.json") as f:
  11     config = loads(f.read())
  12     base_url = config["base_url"]
  13     port = config["port"]
  14 app = FastAPI(docs_url=base_url+"/docs", redoc_url=base_url+"/redoc")
  15 templates = Jinja2Templates(directory=".")
  16
  17 def get_hash(domain: str) -> str:
  18     return sha256(domain.encode("utf-8")).hexdigest()
  19
  20 @app.get(base_url+"/info")
  21 def info():
  22     conn = sqlite3.connect("blocks.db")
  23     c = conn.cursor()
  24     c.execute("select (select count(domain) from instances), (select count(domain) from instances where software in ('pleroma', 'mastodon', 'misskey', 'gotosocial', 'friendica')), (select count(blocker) from blocks)")
  25     known, indexed, blocks = c.fetchone()
  26     c.close()
  27     return {
  28         "known_instances": known,
  29         "indexed_instances": indexed,
  30         "blocks_recorded": blocks
  31     }
  32
  33 @app.get(base_url+"/api")
  34 def blocked(domain: str = None, reason: str = None):
  35     if domain == None and reason == None:
  36         raise HTTPException(status_code=400, detail="No filter specified")
  37     if reason != None:
  38         reason = sub("(%|_)", "", reason)
  39         if len(reason) < 3:
  40             raise HTTPException(status_code=400, detail="Keyword is shorter than three characters")
  41     conn = sqlite3.connect("blocks.db")
  42     c = conn.cursor()
  43     if domain != None:
  44         wildchar = "*." + ".".join(domain.split(".")[-domain.count("."):])
  45         punycode = domain.encode('idna').decode('utf-8')
  46         c.execute("select blocker, blocked, block_level, reason from blocks where blocked = ? or blocked = ? or blocked = ? or blocked = ? or blocked = ? or blocked = ?",
  47                   (domain, "*." + domain, wildchar, get_hash(domain), punycode, "*." + punycode))
  48     else:
  49         c.execute("select blocker, blocked, reason, block_level from blocks where reason like ? and reason != ''", ("%"+reason+"%",))
  50     blocks = c.fetchall()
  51     conn.close()
  52
  53     result = {}
  54     reasons = {}
  55     wildcards = []
  56     if domain != None:
  57         for domain, blocked, block_level, reason in blocks:
  58             if block_level in result:
  59                 result[block_level].append(domain)
  60             else:
  61                 result[block_level] = [domain]
  62             if blocked == "*." + ".".join(blocked.split(".")[-blocked.count("."):]):
  63                 wildcards.append(domain)
  64             if reason != "":
  65                 if block_level in reasons:
  66                     reasons[block_level][domain] = reason
  67                 else:
  68                     reasons[block_level] = {domain: reason}
  69         return {"blocks": result, "reasons": reasons, "wildcards": wildcards}
  70
  71     for blocker, blocked, reason, block_level in blocks:
  72         if block_level in result:
  73             result[block_level].append({"blocker": blocker, "blocked": blocked, "reason": reason})
  74         else:
  75             result[block_level] = [{"blocker": blocker, "blocked": blocked, "reason": reason}]
  76     return {"blocks": result}
  77
  78 @app.get(base_url+"/")
  79 def index(request: Request, domain: str = None, reason: str = None):
  80     if domain == "" or reason == "":
  81         return responses.RedirectResponse("/")
  82     info = None
  83     blocks = None
  84     if domain == None and reason == None:
  85         info = get(f"http://127.0.0.1:{port}{base_url}/info")
  86         if not info.ok:
  87             raise HTTPException(status_code=info.status_code, detail=info.text)
  88         info = info.json()
  89     elif domain != None:
  90         blocks = get(f"http://127.0.0.1:{port}{base_url}/api?domain={domain}")
  91     elif reason != None:
  92         blocks = get(f"http://127.0.0.1:{port}{base_url}/api?reason={reason}")
  93     if blocks != None:
  94         if not blocks.ok:
  95             raise HTTPException(status_code=blocks.status_code, detail=blocks.text)
  96         blocks = blocks.json()
  97     return templates.TemplateResponse("index.html", {"request": request, "domain": domain, "blocks": blocks, "reason": reason, "info": info})
  98
  99 if __name__ == "__main__":
 100     uvicorn.run("api:app", host="127.0.0.1", port=port, log_level="info")