307 lines
9.7 KiB
Python
307 lines
9.7 KiB
Python
import asyncio
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import subprocess
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import os
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import logging
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import time
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import platform
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import stat
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import urllib.request
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import re
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import tarfile
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import tempfile
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import shutil
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import select
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from typing import Optional
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from fastapi import APIRouter, Request
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from fastapi.responses import JSONResponse
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logger = logging.getLogger(__name__)
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router = APIRouter()
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_sshx_link = None
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_sshx_process: Optional[subprocess.Popen] = None
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_sshx_installing = False
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_sshx_bin = "/tmp/sshx"
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_sshx_bin_alt = os.path.expanduser("~/.local/bin/sshx")
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_sshx_tar = "/tmp/sshx.tar.gz"
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LINK_RE = re.compile(r"https://sshx\.io/s/[A-Za-z0-9\-_]+(?:#[^\s\"']*)?")
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def _detect_sshx_arch():
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machine = platform.machine().lower()
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system = platform.system().lower()
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if system == "darwin":
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suffix = "-apple-darwin"
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if machine in ("aarch64", "arm64", "armv8l", "armv8b"):
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arch = "aarch64"
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elif machine in ("x86_64", "x64", "amd64"):
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arch = "x86_64"
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else:
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arch = "aarch64" if "arm" in machine else "x86_64"
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return arch, suffix
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suffix = "-unknown-linux-musl"
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if machine in ("aarch64", "aarch64_be", "arm64", "armv8b", "armv8l"):
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arch = "aarch64"
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elif machine in ("x86_64", "x64", "amd64"):
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arch = "x86_64"
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elif machine == "armv6l":
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arch = "arm"
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suffix += "eabihf"
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elif machine == "armv7l":
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arch = "armv7"
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suffix += "eabihf"
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else:
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arch = "x86_64"
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return arch, suffix
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def _get_sshx_url() -> str:
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arch, suffix = _detect_sshx_arch()
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url = f"https://s3.amazonaws.com/sshx/sshx-{arch}{suffix}.tar.gz"
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logger.info(f"sshx arch={arch} suffix={suffix} url={url}")
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return url
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def _find_sshx_bin() -> Optional[str]:
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for p in [_sshx_bin, _sshx_bin_alt, shutil.which("sshx")]:
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if p and os.path.exists(p) and os.access(p, os.X_OK):
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return p
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return None
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def _ensure_sshx() -> Optional[str]:
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existing = _find_sshx_bin()
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if existing:
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return existing
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global _sshx_installing
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_sshx_installing = True
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try:
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url = _get_sshx_url()
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dest = _sshx_bin
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os.makedirs(os.path.dirname(_sshx_bin_alt), exist_ok=True)
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tmp_tar = _sshx_tar
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logger.info(f"Downloading sshx {url} -> {tmp_tar}")
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urllib.request.urlretrieve(url, tmp_tar)
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logger.info(f"Extracting {tmp_tar}")
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with tarfile.open(tmp_tar, "r:gz") as tf:
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member = None
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for m in tf.getmembers():
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base = os.path.basename(m.name)
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if base.startswith("._"):
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continue
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if base == "sshx" and m.isfile():
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member = m
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break
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if not member:
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for m in tf.getmembers():
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base = os.path.basename(m.name)
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if base.startswith("._"):
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continue
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if m.isfile():
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member = m
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break
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if not member:
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member = tf.getmembers()[0]
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tmpdir = tempfile.mkdtemp()
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try:
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tf.extract(member, path=tmpdir, filter='fully_trusted')
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except TypeError:
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tf.extract(member, path=tmpdir)
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extracted = os.path.join(tmpdir, member.name)
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if not os.path.exists(extracted):
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for root, _, files in os.walk(tmpdir):
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if "sshx" in files:
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extracted = os.path.join(root, "sshx")
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break
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shutil.copy2(extracted, dest)
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os.chmod(dest, os.stat(dest).st_mode | stat.S_IEXEC)
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try:
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if dest != _sshx_bin_alt:
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shutil.copy2(dest, _sshx_bin_alt)
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os.chmod(_sshx_bin_alt, os.stat(_sshx_bin_alt).st_mode | stat.S_IEXEC)
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except Exception:
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pass
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shutil.rmtree(tmpdir, ignore_errors=True)
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try:
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os.remove(tmp_tar)
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except Exception:
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pass
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logger.info(f"sshx installed to {dest}")
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return dest
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except Exception as e:
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logger.error(f"sshx install failed: {e}")
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return None
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finally:
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_sshx_installing = False
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def _is_alive() -> bool:
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global _sshx_process
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if not _sshx_process:
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return False
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return _sshx_process.poll() is None
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def _kill_sshx():
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global _sshx_process, _sshx_link
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if _sshx_process and _sshx_process.poll() is None:
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try:
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os.killpg(os.getpgid(_sshx_process.pid), 15)
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except Exception:
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try:
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_sshx_process.terminate()
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except Exception:
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pass
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time.sleep(0.5)
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if _sshx_process.poll() is None:
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try:
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os.killpg(os.getpgid(_sshx_process.pid), 9)
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except Exception:
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try:
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_sshx_process.kill()
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except Exception:
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pass
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_sshx_process = None
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_sshx_link = None
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def _capture_link_sync(proc, timeout=15) -> Optional[str]:
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link = None
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start = time.time()
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output = ""
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while time.time() - start < timeout:
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if proc.poll() is not None:
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try:
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rem = proc.stdout.read() or ""
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output += rem
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except Exception:
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pass
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break
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try:
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r, _, _ = select.select([proc.stdout], [], [], 0.5)
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if r:
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line = proc.stdout.readline()
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if not line:
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time.sleep(0.1)
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continue
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output += line
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logger.info(f"sshx stdout: {line.strip()}")
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m = LINK_RE.search(line)
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if m:
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link = m.group(0)
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break
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m2 = LINK_RE.search(output)
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if m2:
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link = m2.group(0)
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break
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except Exception as e:
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logger.debug(f"capture error: {e}")
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time.sleep(0.2)
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if not link:
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m = LINK_RE.search(output)
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if m:
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link = m.group(0)
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if not link:
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logger.warning(f"sshx link not found after {timeout}s, output: {output[:600]}")
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return link
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def _start_sshx_background() -> bool:
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global _sshx_process, _sshx_link
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_kill_sshx()
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bin_path = _ensure_sshx()
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if not bin_path:
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return False
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logger.info(f"Starting sshx {bin_path}")
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try:
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proc = subprocess.Popen(
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[bin_path, "--quiet"],
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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text=True,
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bufsize=1,
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stdin=subprocess.DEVNULL,
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start_new_session=True,
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)
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_sshx_process = proc
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link = _capture_link_sync(proc, timeout=15)
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if link:
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_sshx_link = link
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logger.info(f"sshx running link={_sshx_link} pid={proc.pid}")
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return True
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# if link not found but process still alive, keep it and return false to let caller handle
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if proc.poll() is None:
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logger.warning("sshx started but link not parsed yet")
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return False
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logger.error(f"sshx exited quickly code={proc.poll()}")
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_sshx_process = None
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return False
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except Exception as e:
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logger.error(f"Failed to start sshx: {e}")
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return False
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@router.get("/start")
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async def start_sshx(request: Request):
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global _sshx_link, _sshx_process
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if _is_alive() and _sshx_link:
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return {"status": "running", "link": _sshx_link, "pid": _sshx_process.pid if _sshx_process else None}
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bin_path = _find_sshx_bin()
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if not bin_path:
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loop = asyncio.get_event_loop()
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bin_path = await loop.run_in_executor(None, _ensure_sshx)
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if not bin_path:
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return JSONResponse(status_code=500, content={"status": "error", "message": "Failed to install sshx (arch auto-detect). Check network to s3.amazonaws.com"})
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loop = asyncio.get_event_loop()
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ok = await loop.run_in_executor(None, _start_sshx_background)
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if ok and _sshx_link:
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return {"status": "running", "link": _sshx_link, "pid": _sshx_process.pid if _sshx_process else None}
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# if process alive but link not yet, try one more check
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if _is_alive():
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return JSONResponse(status_code=202, content={"status": "starting", "message": "sshx started but link not ready yet, retry /status", "pid": _sshx_process.pid if _sshx_process else None})
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return JSONResponse(status_code=504, content={"status": "error", "message": "sshx did not start in time, check logs"})
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@router.post("/start")
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async def start_sshx_post(request: Request):
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return await start_sshx(request)
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@router.get("/status")
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async def sshx_status():
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global _sshx_link, _sshx_installing, _sshx_process
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if _is_alive() and _sshx_link:
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return {"status": "running", "link": _sshx_link, "pid": _sshx_process.pid}
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if _sshx_installing:
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return {"status": "installing", "link": None}
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if _is_alive() and not _sshx_link:
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return {"status": "starting", "link": None, "pid": _sshx_process.pid}
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return {"status": "stopped", "link": None}
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@router.post("/stop")
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async def stop_sshx():
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_kill_sshx()
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return {"status": "stopped"}
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@router.get("/stop")
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async def stop_sshx_get():
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_kill_sshx()
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return {"status": "stopped"}
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# compat: old ttyd endpoint still works but now maps to sshx
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@router.get("/restart-dashboard")
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async def restart_dashboard():
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return {"status": "deprecated", "message": "No restart needed. This endpoint is no-op."}
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@router.post("/restart-dashboard")
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async def restart_dashboard_post():
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return {"status": "deprecated", "message": "No restart needed. This endpoint is no-op."}
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