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
   9 with open("config.json") as f:
  10     config = loads(f.read())
  11     base_url = config["base_url"]
  12     port = config["port"]
  13 app = FastAPI(docs_url=base_url+"/docs", redoc_url=base_url+"/redoc")
  14 templates = Jinja2Templates(directory=".")
  15
  16 def get_hash(domain: str) -> str:
  17     return sha256(domain.encode("utf-8")).hexdigest()
  18
  19 @app.get(base_url+"/info")
  20 def info():
  21     conn = sqlite3.connect("blocks.db")
  22     c = conn.cursor()
  23     c.execute("select (select count(domain) from instances), (select count(domain) from instances where software in ('pleroma', 'mastodon')), (select count(blocker) from blocks)")
  24     known, indexed, blocks = c.fetchone()
  25     c.close()
  26     return {
  27         "known_instances": known,
  28         "indexed_instances": indexed,
  29         "blocks_recorded": blocks,
  30         "source_code": "https://git.kiwifarms.net/mint/fedi-block-api",
  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     conn = sqlite3.connect("blocks.db")
  38     c = conn.cursor()
  39     if domain != None:
  40         wildchar = "*." + ".".join(domain.split(".")[-domain.count("."):])
  41         punycode = domain.encode('idna').decode('utf-8')
  42         c.execute("select blocker, blocked, block_level, reason from blocks where blocked = ? or blocked = ? or blocked = ? or blocked = ? or blocked = ? or blocked = ?",
  43                   (domain, "*." + domain, wildchar, get_hash(domain), punycode, "*." + punycode))
  44     else:
  45         c.execute("select * from blocks where reason like ? and reason != ''", ("%"+reason+"%",))
  46     blocks = c.fetchall()
  47     conn.close()
  48
  49     result = {}
  50     reasons = {}
  51     wildcards = []
  52     if domain != None:
  53         for domain, blocked, block_level, reason in blocks:
  54             if block_level in result:
  55                 result[block_level].append(domain)
  56             else:
  57                 result[block_level] = [domain]
  58             if blocked == "*." + ".".join(blocked.split(".")[-blocked.count("."):]):
  59                 wildcards.append(domain)
  60             if reason != "":
  61                 if block_level in reasons:
  62                     reasons[block_level][domain] = reason
  63                 else:
  64                     reasons[block_level] = {domain: reason}
  65         return {"blocks": result, "reasons": reasons, "wildcards": wildcards}
  66
  67     for blocker, blocked, reason, block_level in blocks:
  68         if block_level in result:
  69             result[block_level].append({"blocker": blocker, "blocked": blocked, "reason": reason})
  70         else:
  71             result[block_level] = [{"blocker": blocker, "blocked": blocked, "reason": reason}]
  72     return {"blocks": result}
  73
  74 @app.get(base_url+"/")
  75 def index(request: Request, domain: str = None, reason: str = None):
  76     if domain == "" or reason == "":
  77         return responses.RedirectResponse("/")
  78     info = None
  79     blocks = None
  80     if domain == None and reason == None:
  81         info = get(f"http://127.0.0.1:{port}{base_url}/info")
  82         if not info.ok:
  83             raise HTTPException(status_code=info.status_code, detail=info.text)
  84         info = info.json()
  85     elif domain != None:
  86         blocks = get(f"http://127.0.0.1:{port}{base_url}/api?domain={domain}")
  87     elif reason != None:
  88         blocks = get(f"http://127.0.0.1:{port}{base_url}/api?reason={reason}")
  89     if blocks != None:
  90         if not blocks.ok:
  91             raise HTTPException(status_code=blocks.status_code, detail=blocks.text)
  92         blocks = blocks.json()
  93     return templates.TemplateResponse("index.html", {"request": request, "domain": domain, "blocks": blocks, "wildcards": wildcards, "reason": reason, "info": info})
  94
  95 if __name__ == "__main__":
  96     uvicorn.run("api:app", host="127.0.0.1", port=port, log_level="info")