1 files changed, 144 insertions, 0 deletions

diff --git a/server.py b/server.py
new file mode 100644
index 0000000..7edd081
--- /dev/null
+++ b/server.py
@@ -0,0 +1,144 @@
+import socket
+import struct
+from http.server import BaseHTTPRequestHandler, HTTPServer
+from json import load
+from os.path import expanduser
+from re import compile
+from traceback import print_exc
+
+import config
+
+
+def rcon_packet(id: int, type: int, body: str) -> bytes:
+    return (
+        struct.pack(
+            "<iii",
+            len(body) + 10,
+            id,
+            type,
+        )
+        + body.encode("utf-8")
+        + bytes((0, 0))
+    )
+
+
+def rcon_login() -> socket.socket:
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.connect(("127.0.0.1", config.rcon_port))
+    s.send(rcon_packet(0, 3, config.rcon_password))
+    return s
+
+
+def rcon(command: str) -> None:
+    rcon_socket.send(rcon_packet(0, 2, command))
+
+
+def pipe(command: str) -> None:
+    with open(expanduser(config.pipe_path), "w") as pipe:
+        pipe.write(f"{command}\n")
+
+
+class HttpHandler(BaseHTTPRequestHandler):
+    def disabled(self) -> None:
+        self.send_response(503)
+        self.send_header("Content-Type", "text/plain")
+        self.end_headers()
+        self.wfile.write("Endpoint disabled".encode("utf-8"))
+
+    def do_GET(self):
+        if "GET" not in config.enabled_endpoints:
+            self.disabled()
+            return
+
+        try:
+            with open(expanduser(config.whitelist_file_path)) as file:
+                status = 200
+                response = file.read()
+        except Exception:
+            status = 500
+            print_exc()
+
+        self.send_response(status)
+        self.send_header("Content-Type", "application/json")
+        self.end_headers()
+        self.wfile.write(response.encode("utf-8"))
+
+    def do_POST(self) -> None:
+        if "POST" not in config.enabled_endpoints:
+            self.disabled()
+            return
+
+        try:
+            length = int(self.headers.get("Content-Length", 0))
+            username = self.rfile.read(length).decode("utf-8")
+
+            if allowed_usernames_regex.match(username) is None:
+                status = 400
+                response = "Incorrect username"
+            elif username in whitelist:
+                status = 409
+                response = "Player is already whitelisted"
+            else:
+                status = 201
+                response = f"Added {username} to the whitelist"
+
+                whitelist.add(username)
+                console(f"whitelist add {username}")
+        except Exception:
+            status = 500
+            print_exc()
+
+        self.send_response(status)
+        self.send_header("Content-Type", "text/plain")
+        self.end_headers()
+        self.wfile.write(response.encode("utf-8"))
+
+    def do_DELETE(self) -> None:
+        if "DELETE" not in config.enabled_endpoints:
+            self.disabled()
+            return
+
+        try:
+            length = int(self.headers.get("Content-Length", 0))
+            username = self.rfile.read(length).decode("utf-8")
+
+            if allowed_usernames_regex.match(username) is None:
+                status = 400
+                response = "Incorrect username"
+            elif username not in whitelist:
+                status = 409
+                response = "Player is not whitelisted"
+            else:
+                status = 200
+                response = f"Removed {username} from the whitelist"
+
+                whitelist.remove(username)
+                console(f"whitelist remove {username}")
+        except Exception:
+            status = 500
+            print_exc()
+
+        self.send_response(status)
+        self.send_header("Content-Type", "text/plain")
+        self.end_headers()
+        self.wfile.write(response.encode("utf-8"))
+
+
+server = HTTPServer(("0.0.0.0", config.http_port), HttpHandler)
+allowed_usernames_regex = compile(r"^[a-zA-Z0-9_]+$")
+
+with open(expanduser(config.whitelist_file_path)) as file:
+    whitelist = {e["name"] for e in load(file)}
+
+if config.whitelist_access_type == "pipe":
+    console = pipe
+elif config.whitelist_access_type == "rcon":
+    rcon_socket = rcon_login()
+    console = rcon
+
+
+try:
+    server.serve_forever()
+except KeyboardInterrupt:
+    rcon_socket.close()
+    server.server_close()