{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {
    "dotnet_interactive": {
     "language": "csharp"
    },
    "polyglot_notebook": {
     "kernelName": "csharp"
    }
   },
   "source": [
    "# HttpClient 初始化与生命周期管理"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "HttpClient 旨在实例化一次，并在应用程序的整个生命周期内重复使用。\n",
    "\n",
    "为实现复用，HttpClient类库默认使用连接池和请求管道，可以再结合IoC容器、工厂模式(提供了IHttpClientFactory类库)、复原库Polly"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "dotnet_interactive": {
     "language": "csharp"
    },
    "polyglot_notebook": {
     "kernelName": "csharp"
    },
    "vscode": {
     "languageId": "polyglot-notebook"
    }
   },
   "source": [
    "## 1、手动管理：直接实例化-强烈不推荐"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 2、手动管理：静态类或单例"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 3、手动管理：多工具类(每类请求对应一种工具类或单例类)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 4、手动管理 + 可复原(Polly)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 5、IoC容器管理：类型化的客户端"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 6、客户端工厂管理：IHttpClientFactory(需要结合IoC)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 7、综合管理：工厂 + 类型化客户端 ＋ 请求管道 + Polly(默认使用 连接池和IoC容器)"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": ".NET (C#)",
   "language": "C#",
   "name": ".net-csharp"
  },
  "language_info": {
   "name": "python"
  },
  "polyglot_notebook": {
   "kernelInfo": {
    "defaultKernelName": "csharp",
    "items": [
     {
      "aliases": [],
      "name": "csharp"
     }
    ]
   }
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}