本文深入探讨HIGRESS插件开发,包括插件架构、开发流程、实战案例等内容。通过详细的代码示例和最佳实践,帮助开发者掌握插件开发技能,实现自定义网关功能。
mindmap
root((插件特性))
可扩展性
动态加载
热更新
版本管理
灵活性
配置驱动
接口统一
功能组合
性能
异步处理
资源控制
缓存优化
可维护性
日志追踪
监控告警
问题诊断
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import sys
import os
import subprocess
from typing import Dict, Any, List
import json
class EnvironmentChecker:
"""环境检查器"""
def __init__(self):
"""初始化环境检查器"""
self.requirements = {
'python': '3.8+',
'go': '1.16+',
'tinygo': '0.20.0+',
'wasm': '1.0+'
}
def check_environment(self) -> Dict[str, bool]:
"""
检查环境
Returns:
环境检查结果
"""
results = {}
# 检查Python版本
results['python'] = self._check_python_version()
# 检查Go版本
results['go'] = self._check_go_version()
# 检查TinyGo版本
results['tinygo'] = self._check_tinygo_version()
# 检查WASM支持
results['wasm'] = self._check_wasm_support()
return results
def _check_python_version(self) -> bool:
"""
检查Python版本
Returns:
是否满足要求
"""
version = sys.version_info
return version.major >= 3 and version.minor >= 8
def _check_go_version(self) -> bool:
"""
检查Go版本
Returns:
是否满足要求
"""
try:
result = subprocess.run(
['go', 'version'],
capture_output=True,
text=True
)
return 'go version go1.16' in result.stdout
except:
return False
def _check_tinygo_version(self) -> bool:
"""
检查TinyGo版本
Returns:
是否满足要求
"""
try:
result = subprocess.run(
['tinygo', 'version'],
capture_output=True,
text=True
)
return 'tinygo version 0.20.0' in result.stdout
except:
return False
def _check_wasm_support(self) -> bool:
"""
检查WASM支持
Returns:
是否满足要求
"""
try:
result = subprocess.run(
['go', 'env', 'GOARCH'],
capture_output=True,
text=True
)
return 'wasm' in result.stdout
except:
return False
def main():
"""主函数"""
checker = EnvironmentChecker()
results = checker.check_environment()
print("环境检查结果:")
for component, status in results.items():
print(f"{component}: {'✓' if status else '✗'}")
if all(results.values()):
print("\n环境检查通过,可以开始开发插件!")
else:
print("\n环境检查未通过,请安装缺失的组件。")
if __name__ == '__main__':
main()
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from typing import Dict, Any, List
from abc import ABC, abstractmethod
import json
class Plugin(ABC):
"""插件基类"""
@abstractmethod
def init(self, config: Dict[str, Any]) -> None:
"""
初始化插件
Args:
config: 插件配置
"""
pass
@abstractmethod
async def process_request(self, request: Dict[str, Any]) -> Dict[str, Any]:
"""
处理请求
Args:
request: 请求信息
Returns:
处理后的请求
"""
pass
@abstractmethod
async def process_response(self, response: Dict[str, Any]) -> Dict[str, Any]:
"""
处理响应
Args:
response: 响应信息
Returns:
处理后的响应
"""
pass
@abstractmethod
def destroy(self) -> None:
"""销毁插件"""
pass
class PluginConfig:
"""插件配置"""
def __init__(self, config_path: str):
"""
初始化插件配置
Args:
config_path: 配置文件路径
"""
self.config = self._load_config(config_path)
def _load_config(self, config_path: str) -> Dict[str, Any]:
"""
加载配置
Args:
config_path: 配置文件路径
Returns:
配置信息
"""
with open(config_path, 'r') as f:
return json.load(f)
def get_config(self, key: str, default: Any = None) -> Any:
"""
获取配置
Args:
key: 配置键
default: 默认值
Returns:
配置值
"""
return self.config.get(key, default)
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from typing import Dict, Any, List
import importlib
import os
import json
from .plugin import Plugin, PluginConfig
class PluginManager:
"""插件管理器"""
def __init__(self):
"""初始化插件管理器"""
self.plugins: Dict[str, Plugin] = {}
self.configs: Dict[str, PluginConfig] = {}
def load_plugin(self, plugin_path: str, config_path: str) -> None:
"""
加载插件
Args:
plugin_path: 插件路径
config_path: 配置文件路径
"""
# 加载插件配置
config = PluginConfig(config_path)
self.configs[plugin_path] = config
# 加载插件模块
module = importlib.import_module(plugin_path)
plugin_class = getattr(module, 'Plugin')
# 创建插件实例
plugin = plugin_class()
plugin.init(config.get_config('plugin'))
# 注册插件
self.plugins[plugin_path] = plugin
def unload_plugin(self, plugin_path: str) -> None:
"""
卸载插件
Args:
plugin_path: 插件路径
"""
if plugin_path in self.plugins:
# 销毁插件
self.plugins[plugin_path].destroy()
# 移除插件
del self.plugins[plugin_path]
del self.configs[plugin_path]
async def process_request(self, request: Dict[str, Any]) -> Dict[str, Any]:
"""
处理请求
Args:
request: 请求信息
Returns:
处理后的请求
"""
for plugin in self.plugins.values():
request = await plugin.process_request(request)
return request
async def process_response(self, response: Dict[str, Any]) -> Dict[str, Any]:
"""
处理响应
Args:
response: 响应信息
Returns:
处理后的响应
"""
for plugin in self.plugins.values():
response = await plugin.process_response(response)
return response
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from typing import Dict, Any, List
import os
import json
import logging
from dataclasses import dataclass
@dataclass
class DevelopmentStandard:
"""开发规范"""
def __init__(self):
"""初始化开发规范"""
self.standards = {
'code_style': {
'indent': 4,
'max_line_length': 100,
'naming_convention': 'snake_case'
},
'documentation': {
'docstring': True,
'type_hints': True,
'comments': True
},
'testing': {
'unit_test': True,
'integration_test': True,
'coverage': 80
},
'error_handling': {
'logging': True,
'exception_handling': True,
'error_recovery': True
}
}
def check_code_style(self, code: str) -> Dict[str, bool]:
"""
检查代码风格
Args:
code: 代码内容
Returns:
检查结果
"""
results = {}
# 检查缩进
results['indent'] = self._check_indent(code)
# 检查行长度
results['line_length'] = self._check_line_length(code)
# 检查命名规范
results['naming'] = self._check_naming(code)
return results
def _check_indent(self, code: str) -> bool:
"""
检查缩进
Args:
code: 代码内容
Returns:
是否通过
"""
# 实现缩进检查逻辑
return True
def _check_line_length(self, code: str) -> bool:
"""
检查行长度
Args:
code: 代码内容
Returns:
是否通过
"""
# 实现行长度检查逻辑
return True
def _check_naming(self, code: str) -> bool:
"""
检查命名规范
Args:
code: 代码内容
Returns:
是否通过
"""
# 实现命名规范检查逻辑
return True
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from typing import Dict, Any, List
import jwt
import time
from .plugin import Plugin
class AuthPlugin(Plugin):
"""认证插件"""
def __init__(self):
"""初始化认证插件"""
self.secret_key = None
self.token_expire = 3600
def init(self, config: Dict[str, Any]) -> None:
"""
初始化插件
Args:
config: 插件配置
"""
self.secret_key = config.get('secret_key')
self.token_expire = config.get('token_expire', 3600)
async def process_request(self, request: Dict[str, Any]) -> Dict[str, Any]:
"""
处理请求
Args:
request: 请求信息
Returns:
处理后的请求
"""
# 获取token
token = request.get('headers', {}).get('Authorization')
if not token:
raise Exception('未提供认证token')
try:
# 验证token
payload = jwt.decode(
token,
self.secret_key,
algorithms=['HS256']
)
# 检查token是否过期
if payload.get('exp', 0) < time.time():
raise Exception('token已过期')
# 添加用户信息到请求
request['user'] = payload.get('user')
except jwt.InvalidTokenError:
raise Exception('无效的token')
return request
async def process_response(self, response: Dict[str, Any]) -> Dict[str, Any]:
"""
处理响应
Args:
response: 响应信息
Returns:
处理后的响应
"""
return response
def destroy(self) -> None:
"""销毁插件"""
pass
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from typing import Dict, Any, List
import time
from collections import defaultdict
from .plugin import Plugin
class RateLimitPlugin(Plugin):
"""限流插件"""
def __init__(self):
"""初始化限流插件"""
self.rate_limit = 100
self.window_size = 60
self.request_count = defaultdict(int)
self.window_start = defaultdict(float)
def init(self, config: Dict[str, Any]) -> None:
"""
初始化插件
Args:
config: 插件配置
"""
self.rate_limit = config.get('rate_limit', 100)
self.window_size = config.get('window_size', 60)
async def process_request(self, request: Dict[str, Any]) -> Dict[str, Any]:
"""
处理请求
Args:
request: 请求信息
Returns:
处理后的请求
"""
# 获取客户端IP
client_ip = request.get('client_ip')
if not client_ip:
raise Exception('无法获取客户端IP')
# 检查是否需要重置窗口
current_time = time.time()
if current_time - self.window_start[client_ip] > self.window_size:
self.request_count[client_ip] = 0
self.window_start[client_ip] = current_time
# 检查是否超过限制
if self.request_count[client_ip] >= self.rate_limit:
raise Exception('请求频率超过限制')
# 增加请求计数
self.request_count[client_ip] += 1
return request
async def process_response(self, response: Dict[str, Any]) -> Dict[str, Any]:
"""
处理响应
Args:
response: 响应信息
Returns:
处理后的响应
"""
return response
def destroy(self) -> None:
"""销毁插件"""
self.request_count.clear()
self.window_start.clear()
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from typing import Dict, Any, List
import logging
import json
import time
from dataclasses import dataclass
@dataclass
class Debugger:
"""调试器"""
def __init__(self):
"""初始化调试器"""
self.logger = logging.getLogger('plugin_debugger')
self.logger.setLevel(logging.DEBUG)
# 添加控制台处理器
handler = logging.StreamHandler()
formatter = logging.Formatter(
'%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
handler.setFormatter(formatter)
self.logger.addHandler(handler)
def log_request(self, request: Dict[str, Any]) -> None:
"""
记录请求
Args:
request: 请求信息
"""
self.logger.debug(f"请求信息: {json.dumps(request, ensure_ascii=False)}")
def log_response(self, response: Dict[str, Any]) -> None:
"""
记录响应
Args:
response: 响应信息
"""
self.logger.debug(f"响应信息: {json.dumps(response, ensure_ascii=False)}")
def log_error(self, error: Exception) -> None:
"""
记录错误
Args:
error: 错误信息
"""
self.logger.error(f"错误信息: {str(error)}")
def log_performance(self, start_time: float, end_time: float) -> None:
"""
记录性能
Args:
start_time: 开始时间
end_time: 结束时间
"""
duration = end_time - start_time
self.logger.debug(f"执行时间: {duration:.2f}秒")
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import unittest
from typing import Dict, Any, List
import json
from .auth_plugin import AuthPlugin
from .rate_limit_plugin import RateLimitPlugin
class TestAuthPlugin(unittest.TestCase):
"""认证插件测试"""
def setUp(self):
"""测试准备"""
self.plugin = AuthPlugin()
self.plugin.init({
'secret_key': 'test_key',
'token_expire': 3600
})
def test_valid_token(self):
"""测试有效token"""
# 生成token
token = jwt.encode(
{
'user': 'test_user',
'exp': time.time() + 3600
},
'test_key',
algorithm='HS256'
)
# 构造请求
request = {
'headers': {
'Authorization': token
}
}
# 处理请求
result = self.plugin.process_request(request)
# 验证结果
self.assertEqual(result['user'], 'test_user')
def test_invalid_token(self):
"""测试无效token"""
# 构造请求
request = {
'headers': {
'Authorization': 'invalid_token'
}
}
# 验证异常
with self.assertRaises(Exception):
self.plugin.process_request(request)
class TestRateLimitPlugin(unittest.TestCase):
"""限流插件测试"""
def setUp(self):
"""测试准备"""
self.plugin = RateLimitPlugin()
self.plugin.init({
'rate_limit': 2,
'window_size': 60
})
def test_rate_limit(self):
"""测试限流"""
# 构造请求
request = {
'client_ip': '127.0.0.1'
}
# 第一次请求
self.plugin.process_request(request)
# 第二次请求
self.plugin.process_request(request)
# 第三次请求应该失败
with self.assertRaises(Exception):
self.plugin.process_request(request)
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from typing import Dict, Any, List
import asyncio
from functools import lru_cache
import time
from dataclasses import dataclass
@dataclass
class PerformanceOptimizer:
"""性能优化器"""
def __init__(self):
"""初始化性能优化器"""
self.cache = {}
self.connection_pool = {}
self.resource_limits = {
'max_connections': 1000,
'max_memory': 1024 * 1024 * 1024, # 1GB
'max_cpu_percent': 80
}
@lru_cache(maxsize=1000)
def get_cached_data(self, key: str) -> Any:
"""
获取缓存数据
Args:
key: 缓存键
Returns:
缓存数据
"""
return self.cache.get(key)
async def optimize_connection(self, connection: Any) -> None:
"""
优化连接
Args:
connection: 连接对象
"""
# 实现连接优化逻辑
pass
def check_resource_usage(self) -> Dict[str, float]:
"""
检查资源使用情况
Returns:
资源使用情况
"""
# 实现资源检查逻辑
return {
'memory_usage': 0.0,
'cpu_usage': 0.0,
'connection_count': 0
}
插件设计
代码质量
性能考虑
安全防护
开发规范
错误处理
资源管理
测试验证