281 lines
9.0 KiB
Python
281 lines
9.0 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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npm镜像代理处理器
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支持Node.js包管理器
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"""
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import os
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import json
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import time
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import urllib.request
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import urllib.parse
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from typing import Dict, List, Optional
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from datetime import datetime
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class NpmMirror:
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"""npm镜像代理"""
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def __init__(self, config: dict):
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self.config = config
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# 配置 - 使用 storage_dir（基于 base_dir）
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self.upstream_url = config.get('upstream_url', 'https://registry.npmjs.org')
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self.storage_dir = config.get('storage_dir', './downloads/npm')
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self.base_dir = config.get('base_dir', './downloads')
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# 确保存储目录存在
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os.makedirs(self.storage_dir, exist_ok=True)
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def handle_request(self, handler, path: str) -> bool:
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"""
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处理npm请求
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路径格式: /lodash 或 /-/package/lodash/dist
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"""
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try:
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parts = path.strip('/').split('/')
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if not parts:
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return self._handle_index(handler)
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if parts[0] == '-':
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# Scoped package 或其他特殊请求
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if len(parts) >= 4 and parts[1] == 'package':
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return self._handleScopedPackage(handler, parts[2], parts[3] if len(parts) > 3 else None)
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elif len(parts) >= 3 and parts[1] == 'package':
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return self._handle_package(handler, parts[2], None)
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else:
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handler.send_error(400, "Invalid npm API path")
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return False
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elif parts[0] == '@':
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# Scoped package
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if len(parts) >= 2:
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scope = parts[0]
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package = '/'.join(parts[1:])
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return self._handle_scoped_package(handler, scope, package)
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else:
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handler.send_error(400, "Invalid scoped package")
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return False
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elif parts[0] == '-/':
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# npm特殊路径
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return self._handle_special(handler, '/'.join(parts))
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elif len(parts) == 1:
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# 单个包名
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return self._handle_package(handler, parts[0], None)
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else:
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# 其他请求
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return self._handle_package(handler, parts[0], parts[1] if len(parts) > 1 else None)
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except Exception as e:
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handler.send_error(500, str(e))
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return False
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def _handle_index(self, handler) -> bool:
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"""处理索引请求"""
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handler.send_json_response({
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'registry_url': self.upstream_url,
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'cache_stats': self.get_cache_stats()
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})
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return True
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def _handle_package(self, handler, package: str, version: str = None) -> bool:
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"""处理包元数据请求"""
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cache_key = f"package:{package}:{version or 'latest'}"
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cached = self._get_cache(cache_key)
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if cached:
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handler.send_response(200)
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handler.send_header('Content-Type', 'application/json')
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handler.end_headers()
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handler.wfile.write(cached)
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return True
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# 从上游获取
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if version:
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url = f"{self.upstream_url}/{package}/{version}"
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else:
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url = f"{self.upstream_url}/{package}/latest"
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try:
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data = self._fetch(url)
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if self.cache_enabled:
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self._set_cache(cache_key, data)
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handler.send_response(200)
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handler.send_header('Content-Type', 'application/json')
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handler.end_headers()
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handler.wfile.write(data)
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return True
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except urllib.error.HTTPError as e:
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handler.send_error(404, f"Package not found: {package}")
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return False
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def _handle_scoped_package(self, handler, scope: str, package: str) -> bool:
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"""处理scoped包"""
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full_name = f"{scope}/{package}"
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return self._handle_package(handler, full_name, None)
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def _handleScopedPackage(self, handler, scope: str, package: str) -> bool:
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"""处理特殊路径的scoped包"""
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full_name = f"{scope}/{package}"
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return self._handle_package(handler, full_name, None)
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def _handle_special(self, handler, path: str) -> bool:
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"""处理特殊npm路径"""
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# 简化实现：转发到上游
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url = f"{self.upstream_url}/{path}"
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try:
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data = self._fetch(url)
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handler.send_response(200)
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handler.send_header('Content-Type', 'application/json')
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handler.end_headers()
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handler.wfile.write(data)
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return True
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except Exception as e:
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handler.send_error(502, f"Failed to fetch: {str(e)}")
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return False
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def _handle_tarball(self, handler, package: str, filename: str) -> bool:
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"""处理tarball下载"""
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cache_key = f"tarball:{package}:{filename}"
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cached = self._get_cache(cache_key)
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if cached:
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handler.send_response(200)
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handler.send_header('Content-Type', 'application/octet-stream')
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handler.send_header('Content-Length', str(len(cached)))
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handler.end_headers()
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handler.wfile.write(cached)
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return True
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# 从上游获取
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url = f"{self.upstream_url}/{package}/-/{filename}"
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try:
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data = self._fetch(url)
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if self.cache_enabled:
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self._set_cache(cache_key, data)
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handler.send_response(200)
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handler.send_header('Content-Type', 'application/octet-stream')
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handler.send_header('Content-Length', str(len(data)))
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handler.end_headers()
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handler.wfile.write(data)
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return True
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except Exception as e:
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handler.send_error(502, f"Failed to fetch tarball: {str(e)}")
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return False
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def _fetch(self, url: str) -> Optional[bytes]:
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"""从URL获取数据"""
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try:
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req = urllib.request.Request(url)
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req.add_header('User-Agent', 'npm-Mirror/1.0')
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req.add_header('Accept', 'application/json')
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with urllib.request.urlopen(req, timeout=30) as response:
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return response.read()
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except Exception:
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return None
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def _get_cache(self, cache_key: str) -> Optional[bytes]:
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"""获取缓存"""
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if not self.cache_enabled:
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return None
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cache_path = self._get_cache_path(cache_key)
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meta_path = cache_path + '.meta'
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if not os.path.exists(cache_path):
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return None
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if os.path.exists(meta_path):
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try:
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with open(meta_path, 'r') as f:
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meta = json.load(f)
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if time.time() > meta.get('expires', 0):
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return None
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except Exception:
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pass
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try:
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with open(cache_path, 'rb') as f:
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return f.read()
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except Exception:
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return None
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def _set_cache(self, cache_key: str, data: bytes):
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"""设置缓存"""
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cache_path = self._get_cache_path(cache_key)
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meta_path = cache_path + '.meta'
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os.makedirs(os.path.dirname(cache_path), exist_ok=True)
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try:
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with open(cache_path, 'wb') as f:
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f.write(data)
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meta = {
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'cached_at': time.time(),
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'expires': time.time() + self.cache_ttl,
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'size': len(data)
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}
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with open(meta_path, 'w') as f:
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json.dump(meta, f)
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except Exception as e:
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print(f"npm缓存写入失败: {e}")
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def _get_cache_path(self, cache_key: str) -> str:
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"""获取缓存路径"""
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subdir = cache_key[:2]
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return os.path.join(self.storage_dir, subdir, cache_key)
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def get_cache_stats(self) -> dict:
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"""获取缓存统计"""
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if not os.path.exists(self.storage_dir):
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return {'files': 0, 'size': 0}
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total_size = 0
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file_count = 0
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for root, dirs, files in os.walk(self.storage_dir):
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for f in files:
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if not f.endswith('.meta'):
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file_count += 1
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total_size += os.path.getsize(os.path.join(root, f))
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return {
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'files': file_count,
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'size': total_size,
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'size_formatted': self._format_size(total_size)
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}
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def _format_size(self, size_bytes: int) -> str:
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"""格式化文件大小"""
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if size_bytes == 0:
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return "0 B"
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units = ["B", "KB", "MB", "GB"]
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i = 0
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while size_bytes >= 1024 and i < len(units) - 1:
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size_bytes /= 1024.0
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i += 1
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return f"{size_bytes:.2f} {units[i]}"
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