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import atexit
import os
import platform
import re
import stat
import subprocess
import sys
import time
from pathlib import Path
from typing import List
import httpx
VERSION = "0.2"
CURRENT_TUNNELS: List["Tunnel"] = []
machine = platform.machine()
if machine == "x86_64":
machine = "amd64"
BINARY_REMOTE_NAME = f"frpc_{platform.system().lower()}_{machine.lower()}"
EXTENSION = ".exe" if os.name == "nt" else ""
BINARY_URL = f"https://cdn-media.huggingface.co/frpc-gradio-{VERSION}/{BINARY_REMOTE_NAME}{EXTENSION}"
BINARY_FILENAME = f"{BINARY_REMOTE_NAME}_v{VERSION}"
BINARY_FOLDER = Path(__file__).parent
BINARY_PATH = f"{BINARY_FOLDER / BINARY_FILENAME}"
TUNNEL_TIMEOUT_SECONDS = 30
TUNNEL_ERROR_MESSAGE = (
"Could not create share URL. "
"Please check the appended log from frpc for more information:"
)
class Tunnel:
def __init__(self, remote_host, remote_port, local_host, local_port, share_token):
self.proc = None
self.url = None
self.remote_host = remote_host
self.remote_port = remote_port
self.local_host = local_host
self.local_port = local_port
self.share_token = share_token
@staticmethod
def download_binary():
if not Path(BINARY_PATH).exists():
resp = httpx.get(BINARY_URL, timeout=30)
if resp.status_code == 403:
raise OSError(
f"Cannot set up a share link as this platform is incompatible. Please "
f"create a GitHub issue with information about your platform: {platform.uname()}"
)
resp.raise_for_status()
# Save file data to local copy
with open(BINARY_PATH, "wb") as file:
file.write(resp.content)
st = os.stat(BINARY_PATH)
os.chmod(BINARY_PATH, st.st_mode | stat.S_IEXEC)
def start_tunnel(self) -> str:
self.download_binary()
self.url = self._start_tunnel(BINARY_PATH)
return self.url
def kill(self):
if self.proc is not None:
print(f"Killing tunnel {self.local_host}:{self.local_port} <> {self.url}")
self.proc.terminate()
self.proc = None
def _start_tunnel(self, binary: str) -> str:
CURRENT_TUNNELS.append(self)
command = [
binary,
"http",
"-n",
self.share_token,
"-l",
str(self.local_port),
"-i",
self.local_host,
"--uc",
"--sd",
"random",
"--ue",
"--server_addr",
f"{self.remote_host}:{self.remote_port}",
"--disable_log_color",
]
self.proc = subprocess.Popen(
command, stdout=subprocess.PIPE, stderr=subprocess.PIPE
)
atexit.register(self.kill)
return self._read_url_from_tunnel_stream()
def _read_url_from_tunnel_stream(self) -> str:
start_timestamp = time.time()
log = []
url = ""
def _raise_tunnel_error():
log_text = "\n".join(log)
print(log_text, file=sys.stderr)
raise ValueError(f"{TUNNEL_ERROR_MESSAGE}\n{log_text}")
while url == "":
# check for timeout and log
if time.time() - start_timestamp >= TUNNEL_TIMEOUT_SECONDS:
_raise_tunnel_error()
assert self.proc is not None # noqa: S101
if self.proc.stdout is None:
continue
line = self.proc.stdout.readline()
line = line.decode("utf-8")
if line == "":
continue
log.append(line.strip())
if "start proxy success" in line:
result = re.search("start proxy success: (.+)\n", line)
if result is None:
_raise_tunnel_error()
else:
url = result.group(1)
elif "login to server failed" in line:
_raise_tunnel_error()
return url
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