Add script to fetch instances from peerlist

fetch_instances.py

@@ -0,0 +1,65 @@
+from requests import get
+from hashlib import sha256
+import sqlite3
+import sys
+import json
+
+domain = sys.argv[1]
+
+headers = {
+    "user-agent": "Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0"
+}
+
+
+def get_hash(domain: str) -> str:
+    return sha256(domain.encode("utf-8")).hexdigest()
+
+
+def get_peers(domain: str) -> str:
+    try:
+        res = get(f"https://{domain}/api/v1/instance/peers", headers=headers, timeout=5)
+        return res.json()
+    except:
+        return None
+
+peerlist = get_peers(domain)
+
+def get_type(domain: str) -> str:
+    try:
+        res = get(f"https://{domain}/nodeinfo/2.1.json", headers=headers, timeout=5)
+        if res.status_code == 404:
+            res = get(f"https://{domain}/nodeinfo/2.0.json", headers=headers, timeout=5)
+        if res.ok and "text/html" in res.headers["content-type"]:
+            res = get(f"https://{domain}/nodeinfo/2.1", headers=headers, timeout=5)
+        if res.ok:
+            if res.json()["software"]["name"] == "akkoma":
+                return "pleroma"
+            else:
+                return res.json()["software"]["name"]
+        elif res.status_code == 404:
+            res = get(f"https://{domain}/api/v1/instance", headers=headers, timeout=5)
+        if res.ok:
+            return "mastodon"
+    except:
+        return None
+
+
+conn = sqlite3.connect("blocks.db")
+c = conn.cursor()
+
+c.execute(
+    "select domain from instances where 1"
+)
+
+for instance in peerlist:
+    print(instance)
+    try:
+        if c.fetchone() == None:
+            c.execute(
+                "insert into instances select ?, ?, ?",
+                (instance, get_hash(instance), get_type(instance)),
+            )
+        conn.commit()
+    except Exception as e:
+        print("error:", e, blocker)
+conn.close()