{"id":50209,"date":"2025-07-30T22:01:28","date_gmt":"2025-07-30T14:01:28","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/50209.html"},"modified":"2025-07-30T22:01:28","modified_gmt":"2025-07-30T14:01:28","slug":"nestjs%e6%a1%86%e6%9e%b6-%e9%9d%a2%e5%90%91%e5%88%87%e9%9d%a2%e7%bc%96%e7%a8%8b-aop","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/50209.html","title":{"rendered":"Nestjs\u6846\u67b6: \u9762\u5411\u5207\u9762\u7f16\u7a0b AOP"},"content":{"rendered":"<h4>\u4ec0\u4e48\u662f AOP&#xff1f;<\/h4>\n<ul>\n<li>AOP&#xff08;Aspect-Oriented Programming&#xff0c;\u9762\u5411\u5207\u9762\u7f16\u7a0b&#xff09;\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f<\/li>\n<li>\u5b83\u65e8\u5728\u901a\u8fc7\u5c06\u6a2a\u5207\u5173\u6ce8\u70b9&#xff08;cross-cutting concerns&#xff09;\u4ece\u6838\u5fc3\u4e1a\u52a1\u903b\u8f91\u4e2d\u5206\u79bb\u51fa\u6765<\/li>\n<li>\u5b9e\u73b0\u6a21\u5757\u5316\u548c\u53ef\u7ef4\u62a4\u6027<\/li>\n<li>\u6838\u5fc3\u601d\u60f3\u662f&#xff1a;\u5728\u4e0d\u7834\u574f\u539f\u6709\u5c01\u88c5\u7684\u524d\u63d0\u4e0b&#xff0c;\u5bf9\u7cfb\u7edf\u529f\u80fd\u8fdb\u884c\u975e\u4fb5\u5165\u5f0f\u7684\u529f\u80fd\u589e\u5f3a<\/li>\n<li>\u4e3e\u4e2a\u4f8b\u5b50&#xff1a;\n<ul>\n<li>\u6211\u4eec\u6709\u4e00\u4e2a\u4e1a\u52a1\u7cfb\u7edf A&#xff0c;\u5b83\u672c\u8eab\u5177\u6709\u81ea\u5df1\u7684\u72ec\u7acb\u529f\u80fd<\/li>\n<li>\u5982\u679c\u6211\u4eec\u73b0\u5728\u8981\u4e3a\u7cfb\u7edf A \u589e\u52a0\u4e00\u4e2a\u65b0\u529f\u80fd&#xff08;\u4f8b\u5982\u7edf\u4e00\u65e5\u5fd7\u8bb0\u5f55\u3001\u6743\u9650\u63a7\u5236\u3001\u9519\u8bef\u5904\u7406\u7b49&#xff09;<\/li>\n<li>\u6211\u4eec\u4e0d\u9700\u8981\u4fee\u6539\u539f\u6709\u4e1a\u52a1\u7c7b&#xff0c;\u800c\u662f\u5728\u4e1a\u52a1\u4e4b\u5916\u901a\u8fc7 AOP \u7684\u65b9\u5f0f<\/li>\n<li>\u5c06\u8fd9\u4e9b\u65b0\u529f\u80fd\u201c\u7ec7\u5165\u201d\u5230\u76ee\u6807\u4e1a\u52a1\u6d41\u7a0b\u4e2d<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>AOP \u4e0e OOP \u7684\u533a\u522b\u4e0e\u4e92\u8865<\/h4>\n<ul>\n<li>\u5728 OOP&#xff08;Object-Oriented Programming&#xff0c;\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b&#xff09;\u4e2d<\/li>\n<li>\u6211\u4eec\u901a\u8fc7\u7c7b&#xff08;class&#xff09;\u6765\u7ec4\u7ec7\u4e1a\u52a1\u903b\u8f91<\/li>\n<li>\u6bcf\u4e2a\u4e1a\u52a1\u529f\u80fd\u90fd\u5c01\u88c5\u5728\u76f8\u5e94\u7684\u5bf9\u8c61\u4e2d<\/li>\n<\/ul>\n<p>\u5f53\u6211\u4eec\u9700\u8981\u4e3a\u591a\u4e2a\u7c7b\u6dfb\u52a0\u76f8\u540c\u7684\u529f\u80fd\u65f6&#xff0c;\u901a\u5e38\u7684\u505a\u6cd5\u662f&#xff1a;<\/p>\n<ul>\n<li>\u7ee7\u627f&#xff1a;\u521b\u5efa\u4e00\u4e2a\u7236\u7c7b&#xff0c;\u8ba9\u5176\u4ed6\u7c7b\u7ee7\u627f\u5b83\u3002<\/li>\n<li>\u88c5\u9970\u5668\u6a21\u5f0f&#xff1a;\u901a\u8fc7\u5305\u88c5\u7c7b\u6765\u6269\u5c55\u529f\u80fd\u3002<\/li>\n<li>\u590d\u5236\u7c98\u8d34&#xff1a;\u5728\u6bcf\u4e2a\u7c7b\u4e2d\u624b\u52a8\u6dfb\u52a0\u76f8\u540c\u903b\u8f91\u3002<\/li>\n<li>\u8fd9\u4e9b\u505a\u6cd5\u5bb9\u6613\u9020\u6210\u4ee3\u7801\u5197\u4f59\u3001\u96be\u4ee5\u7ef4\u62a4\u3001\u8fdd\u53cd\u5f00\u95ed\u539f\u5219\u7b49\u95ee\u9898<\/li>\n<\/ul>\n<p>\u800c AOP \u7684\u51fa\u73b0\u6b63\u662f\u4e3a\u4e86\u89e3\u51b3\u8fd9\u79cd\u95ee\u9898\u3002\u5b83\u5141\u8bb8\u6211\u4eec&#xff1a;<\/p>\n<ul>\n<li>\u5c06\u901a\u7528\u529f\u80fd&#xff08;\u5982\u65e5\u5fd7\u3001\u4e8b\u52a1\u3001\u5b89\u5168\u7b49&#xff09;\u96c6\u4e2d\u7ba1\u7406<\/li>\n<li>\u5728\u4e0d\u4fee\u6539\u539f\u4ee3\u7801\u7684\u524d\u63d0\u4e0b&#xff0c;\u6a2a\u5411\u63d2\u5165\u5230\u591a\u4e2a\u7c7b\u7684\u65b9\u6cd5\u4e2d<\/li>\n<li>\u5b9e\u73b0\u529f\u80fd\u7684\u590d\u7528\u4e0e\u96c6\u4e2d\u63a7\u5236<\/li>\n<\/ul>\n<p>AOP \u662f\u5bf9 OOP \u7684\u8865\u5145&#xff0c;\u5b83\u5f25\u8865\u4e86 OOP \u5728\u6a2a\u5207\u5173\u6ce8\u70b9\u4e0a\u7684\u4e0d\u8db3<\/p>\n<h4>AOP \u7684\u5178\u578b\u5e94\u7528\u573a\u666f<\/h4>\n<li>\u7edf\u4e00\u65e5\u5fd7\u8bb0\u5f55<\/li>\n<li>\u6743\u9650\u63a7\u5236<\/li>\n<li>\u5f02\u5e38\u5904\u7406<\/li>\n<li>\u6027\u80fd\u76d1\u63a7<\/li>\n<li>\u4e8b\u52a1\u7ba1\u7406<\/li>\n<li>\u7f13\u5b58\u673a\u5236<\/li>\n<p>\u8fd9\u4e9b\u529f\u80fd\u901a\u5e38\u4f1a\u6a2a\u8de8\u591a\u4e2a\u6a21\u5757\u6216\u7c7b&#xff0c;\u5982\u679c\u76f4\u63a5\u5199\u5728\u4e1a\u52a1\u903b\u8f91\u4e2d&#xff0c;\u4f1a\u5bfc\u81f4\u4ee3\u7801\u5197\u4f59\u3001\u903b\u8f91\u6df7\u4e71\u3002\u800c AOP \u53ef\u4ee5\u8ba9\u6211\u4eec\u5c06\u8fd9\u4e9b\u529f\u80fd\u96c6\u4e2d\u5b9a\u4e49&#xff0c;\u52a8\u6001\u7ec7\u5165\u5230\u9700\u8981\u7684\u5730\u65b9\u3002<\/p>\n<hr \/>\n<p>\u56db\u3001AOP \u6838\u5fc3\u6982\u5ff5\u89e3\u6790<\/p>\n<table>\n<tr>\u6982\u5ff5\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>Aspect&#xff08;\u5207\u9762&#xff09;<\/td>\n<td>\u662f\u4e00\u4e2a\u7c7b&#xff0c;\u5305\u542b\u591a\u4e2a\u901a\u77e5&#xff08;Advice&#xff09;&#xff0c;\u7528\u4e8e\u5b9a\u4e49\u8981\u63d2\u5165\u7684\u6a2a\u5207\u529f\u80fd<\/td>\n<\/tr>\n<tr>\n<td>Join Point&#xff08;\u8fde\u63a5\u70b9&#xff09;<\/td>\n<td>\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u7684\u67d0\u4e2a\u7279\u5b9a\u70b9&#xff0c;\u6bd4\u5982\u65b9\u6cd5\u8c03\u7528\u524d\u3001\u8c03\u7528\u540e\u3001\u629b\u5f02\u5e38\u7b49<\/td>\n<\/tr>\n<tr>\n<td>Pointcut&#xff08;\u5207\u5165\u70b9&#xff09;<\/td>\n<td>\u5b9a\u4e49\u54ea\u4e9b\u8fde\u63a5\u70b9\u4f1a\u88ab\u5207\u9762\u5904\u7406&#xff0c;\u901a\u5e38\u901a\u8fc7\u8868\u8fbe\u5f0f\u5339\u914d\u65b9\u6cd5\u540d<\/td>\n<\/tr>\n<tr>\n<td>Advice&#xff08;\u901a\u77e5&#xff09;<\/td>\n<td>\u5207\u9762\u5728\u7279\u5b9a\u8fde\u63a5\u70b9\u4e0a\u6267\u884c\u7684\u52a8\u4f5c&#xff0c;\u5982\u524d\u7f6e\u901a\u77e5\u3001\u540e\u7f6e\u901a\u77e5\u3001\u5f02\u5e38\u901a\u77e5\u7b49<\/td>\n<\/tr>\n<tr>\n<td>Target Object&#xff08;\u76ee\u6807\u5bf9\u8c61&#xff09;<\/td>\n<td>\u88ab\u4ee3\u7406\u7684\u5bf9\u8c61&#xff0c;\u4e5f\u5c31\u662f\u539f\u59cb\u4e1a\u52a1\u5bf9\u8c61<\/td>\n<\/tr>\n<tr>\n<td>Weaving&#xff08;\u7ec7\u5165&#xff09;<\/td>\n<td>\u5c06\u5207\u9762\u4ee3\u7801\u63d2\u5165\u5230\u76ee\u6807\u5bf9\u8c61\u7684\u8fc7\u7a0b&#xff0c;\u53ef\u4ee5\u5728\u7f16\u8bd1\u65f6\u3001\u7c7b\u52a0\u8f7d\u65f6\u6216\u8fd0\u884c\u65f6\u5b8c\u6210<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>AOP \u7684\u4f18\u52bf\u603b\u7ed3<\/h4>\n<li>\u89e3\u8026\u6a2a\u5207\u5173\u6ce8\u70b9&#xff1a;\u5c06\u65e5\u5fd7\u3001\u6743\u9650\u7b49\u975e\u4e1a\u52a1\u903b\u8f91\u4ece\u4e3b\u4e1a\u52a1\u903b\u8f91\u4e2d\u62bd\u79bb\u3002<\/li>\n<li>\u63d0\u9ad8\u53ef\u7ef4\u62a4\u6027&#xff1a;\u7edf\u4e00\u903b\u8f91\u96c6\u4e2d\u7ba1\u7406&#xff0c;\u4e00\u5904\u4fee\u6539\u5f71\u54cd\u5168\u5c40\u3002<\/li>\n<li>\u589e\u5f3a\u53ef\u6269\u5c55\u6027&#xff1a;\u65b0\u589e\u529f\u80fd\u65e0\u9700\u4fee\u6539\u539f\u6709\u4ee3\u7801&#xff0c;\u7b26\u5408\u5f00\u95ed\u539f\u5219\u3002<\/li>\n<li>\u63d0\u5347\u4ee3\u7801\u590d\u7528\u6027&#xff1a;\u901a\u8fc7\u5207\u9762\u6a21\u5757\u5316&#xff0c;\u5b9e\u73b0\u903b\u8f91\u5728\u591a\u4e2a\u6a21\u5757\u95f4\u7684\u590d\u7528\u3002<\/li>\n<li>\u975e\u4fb5\u5165\u6027&#xff1a;\u5bf9\u4e1a\u52a1\u4ee3\u7801\u65e0\u4fb5\u5165&#xff0c;\u4fdd\u6301\u4ee3\u7801\u7684\u6e05\u6670\u4e0e\u6574\u6d01\u3002<\/li>\n<h4>NestJS AOP \u5b9e\u73b0\u793a\u4f8b&#xff1a;\u65e5\u5fd7\u62e6\u622a\u5668<\/h4>\n<p>\u4ee5\u4e0b\u662f NestJS \u76f8\u5173\u5b9e\u73b0\u7684\u7248\u672c&#xff0c;\u7ed3\u5408 AOP \u601d\u60f3\u4e0e NestJS \u6846\u67b6\u7279\u6027&#xff08;\u57fa\u4e8e\u62e6\u622a\u5668\u3001\u88c5\u9970\u5668\u7b49\u673a\u5236&#xff09;<\/p>\n<p>1 ) NestJS AOP \u5b9e\u73b0\u793a\u4f8b&#xff1a;\u65e5\u5fd7\u62e6\u622a\u5668<\/p>\n<p><span class=\"token comment\">\/\/ 1. \u5b9a\u4e49\u65e5\u5fd7\u62e6\u622a\u5668&#xff08;Logging Interceptor&#xff09; &#8211; \u6838\u5fc3\u5207\u9762\u903b\u8f91 <\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> Injectable<span class=\"token punctuation\">,<\/span> NestInterceptor<span class=\"token punctuation\">,<\/span> ExecutionContext<span class=\"token punctuation\">,<\/span> CallHandler <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;&#064;nestjs\/common&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> Observable <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;rxjs&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> tap <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;rxjs\/operators&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#064;<span class=\"token function\">Injectable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">export<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">LoggingInterceptor<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">NestInterceptor<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">intercept<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token operator\">:<\/span> ExecutionContext<span class=\"token punctuation\">,<\/span> next<span class=\"token operator\">:<\/span> CallHandler<span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span> Observable<span class=\"token operator\">&lt;<\/span><span class=\"token builtin\">any<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> request <span class=\"token operator\">&#061;<\/span> context<span class=\"token punctuation\">.<\/span><span class=\"token function\">switchToHttp<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getRequest<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> methodName <span class=\"token operator\">&#061;<\/span> context<span class=\"token punctuation\">.<\/span><span class=\"token function\">getHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u83b7\u53d6\u5f53\u524d\u8c03\u7528\u7684\u65b9\u6cd5\u540d<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> className <span class=\"token operator\">&#061;<\/span> context<span class=\"token punctuation\">.<\/span><span class=\"token function\">getClass<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u83b7\u53d6\u5f53\u524d\u63a7\u5236\u5668\u7c7b\u540d <\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u3010\u524d\u7f6e\u901a\u77e5\u3011\u65b9\u6cd5\u8c03\u7528\u524d\u8bb0\u5f55\u65e5\u5fd7 <\/span><br \/>\n    <span class=\"token builtin\">console<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token template-string\"><span class=\"token template-punctuation string\">&#096;<\/span><span class=\"token string\">[AOP] \u8bf7\u6c42 <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>className<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token string\">.<\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>methodName<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token string\"> \u5f00\u59cb | \u53c2\u6570: <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span><span class=\"token constant\">JSON<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">stringify<\/span><span class=\"token punctuation\">(<\/span>request<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">)<\/span><span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token template-punctuation string\">&#096;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> next<span class=\"token punctuation\">.<\/span><span class=\"token function\">handle<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">pipe<\/span><span class=\"token punctuation\">(<\/span><br \/>\n      <span class=\"token function\">tap<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u3010\u540e\u7f6e\u901a\u77e5\u3011\u65b9\u6cd5\u8c03\u7528\u540e\u8bb0\u5f55\u65e5\u5fd7<\/span><br \/>\n        <span class=\"token builtin\">console<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token template-string\"><span class=\"token template-punctuation string\">&#096;<\/span><span class=\"token string\">[AOP] \u8bf7\u6c42 <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>className<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token string\">.<\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>methodName<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token string\"> \u5b8c\u6210<\/span><span class=\"token template-punctuation string\">&#096;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n      <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>2 ) \u4e1a\u52a1\u670d\u52a1\u5c42&#xff08;Service&#xff09; &#8211; \u539f\u59cb\u4e1a\u52a1\u903b\u8f91<\/p>\n<p><span class=\"token comment\">\/\/ order.service.ts <\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> Injectable <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;&#064;nestjs\/common&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#064;<span class=\"token function\">Injectable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">export<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderService<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">createOrder<\/span><span class=\"token punctuation\">(<\/span>orderData<span class=\"token operator\">:<\/span> <span class=\"token builtin\">any<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span> <span class=\"token builtin\">string<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token builtin\">console<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u4e1a\u52a1\u903b\u8f91&#xff1a;\u521b\u5efa\u8ba2\u5355\u4e2d&#8230;&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">&#096;<\/span><span class=\"token string\">\u8ba2\u5355 <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>orderData<span class=\"token punctuation\">.<\/span>id<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token string\"> \u521b\u5efa\u6210\u529f<\/span><span class=\"token template-punctuation string\">&#096;<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  <span class=\"token function\">deleteOrder<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token operator\">:<\/span> <span class=\"token builtin\">string<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span> <span class=\"token builtin\">string<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token builtin\">console<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u4e1a\u52a1\u903b\u8f91&#xff1a;\u5220\u9664\u8ba2\u5355\u4e2d&#8230;&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token template-string\"><span class=\"token template-punctuation string\">&#096;<\/span><span class=\"token string\">\u8ba2\u5355 <\/span><span class=\"token interpolation\"><span class=\"token interpolation-punctuation punctuation\">${<\/span>id<span class=\"token interpolation-punctuation punctuation\">}<\/span><\/span><span class=\"token string\"> \u5df2\u5220\u9664<\/span><span class=\"token template-punctuation string\">&#096;<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>3 ) \u63a7\u5236\u5668\u5c42&#xff08;Controller&#xff09; &#8211; \u63a5\u5165\u5207\u9762<\/p>\n<p><span class=\"token comment\">\/\/ order.controller.ts <\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> Controller<span class=\"token punctuation\">,<\/span> Post<span class=\"token punctuation\">,<\/span> Delete<span class=\"token punctuation\">,<\/span> UseInterceptors<span class=\"token punctuation\">,<\/span> Body<span class=\"token punctuation\">,<\/span> Param <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;&#064;nestjs\/common&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> OrderService <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;.\/order.service&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> LoggingInterceptor <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;.\/logging.interceptor&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#064;<span class=\"token function\">Controller<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;orders&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n&#064;<span class=\"token function\">UseInterceptors<\/span><span class=\"token punctuation\">(<\/span>LoggingInterceptor<span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u5e94\u7528\u65e5\u5fd7\u62e6\u622a\u5668&#xff08;\u5207\u9762&#xff09;<\/span><br \/>\n<span class=\"token keyword\">export<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderController<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">constructor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">private<\/span> <span class=\"token keyword\">readonly<\/span> orderService<span class=\"token operator\">:<\/span> OrderService<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>  &#064;<span class=\"token function\">Post<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n  <span class=\"token function\">createOrder<\/span><span class=\"token punctuation\">(<\/span>&#064;<span class=\"token function\">Body<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> orderData<span class=\"token operator\">:<\/span> <span class=\"token builtin\">any<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>orderService<span class=\"token punctuation\">.<\/span><span class=\"token function\">createOrder<\/span><span class=\"token punctuation\">(<\/span>orderData<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  &#064;<span class=\"token function\">Delete<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;:id&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n  <span class=\"token function\">deleteOrder<\/span><span class=\"token punctuation\">(<\/span>&#064;<span class=\"token function\">Param<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;id&#039;<\/span><span class=\"token punctuation\">)<\/span> id<span class=\"token operator\">:<\/span> <span class=\"token builtin\">string<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>orderService<span class=\"token punctuation\">.<\/span><span class=\"token function\">deleteOrder<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<li>\u6a21\u5757\u6ce8\u518c&#xff08;Module&#xff09;<\/li>\n<p><span class=\"token comment\">\/\/ app.module.ts <\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> Module <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;&#064;nestjs\/common&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> OrderController <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;.\/order.controller&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> OrderService <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;.\/order.service&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> LoggingInterceptor <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;.\/logging.interceptor&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#064;<span class=\"token function\">Module<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><br \/>\n  controllers<span class=\"token operator\">:<\/span> <span class=\"token punctuation\">[<\/span>OrderController<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  providers<span class=\"token operator\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n    OrderService<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n      provide<span class=\"token operator\">:<\/span> <span class=\"token constant\">APP_INTERCEPTOR<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token comment\">\/\/ \u5168\u5c40\u6ce8\u518c\u62e6\u622a\u5668<\/span><br \/>\n      useClass<span class=\"token operator\">:<\/span> LoggingInterceptor<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">export<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AppModule<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6267\u884c\u6548\u679c\u6f14\u793a&#xff0c;\u8bf7\u6c42\u793a\u4f8b<\/p>\n<p>POST \/orders Body: <span class=\"token punctuation\">{<\/span> <span class=\"token string\">&#034;id&#034;<\/span><span class=\"token builtin class-name\">:<\/span> <span class=\"token string\">&#034;123&#034;<\/span>, <span class=\"token string\">&#034;product&#034;<\/span><span class=\"token builtin class-name\">:<\/span> <span class=\"token string\">&#034;Laptop&#034;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>\u63a7\u5236\u53f0\u8f93\u51fa<\/p>\n<p>[AOP] \u8bf7\u6c42 OrderController.createOrder \u5f00\u59cb | \u53c2\u6570: {&#034;id&#034;:&#034;123&#034;,&#034;product&#034;:&#034;Laptop&#034;}<br \/>\n\u4e1a\u52a1\u903b\u8f91&#xff1a;\u521b\u5efa\u8ba2\u5355\u4e2d&#8230;<br \/>\n[AOP] \u8bf7\u6c42 OrderController.createOrder \u5b8c\u6210 <\/p>\n<p>\u5173\u952e\u8bbe\u8ba1\u89e3\u6790<\/p>\n<li>\u975e\u4fb5\u5165\u5f0f\u6269\u5c55<\/li>\n<ul>\n<li>\u901a\u8fc7 &#064;UseInterceptors() \u88c5\u9970\u5668\u52a8\u6001\u7ec7\u5165\u65e5\u5fd7\u529f\u80fd&#xff0c;\u65e0\u9700\u4fee\u6539 OrderService \u4e1a\u52a1\u4ee3\u7801<\/li>\n<\/ul>\n<li>NestJS AOP \u6838\u5fc3\u673a\u5236<\/li>\n<ul>\n<li>\u62e6\u622a\u5668&#xff08;Interceptor&#xff09;&#xff1a;\u5b9e\u73b0 NestInterceptor&#xff0c;\u5728\u65b9\u6cd5\u6267\u884c\u524d\u540e\u63d2\u5165\u903b\u8f91&#xff08;\u7c7b\u6bd4 &#064;Before\/&#064;After&#xff09;<\/li>\n<li>\u7ba1\u9053&#xff08;Pipe&#xff09;&#xff1a;\u7528\u4e8e\u53c2\u6570\u6821\u9a8c\/\u8f6c\u6362&#xff08;\u5982 &#064;Body() \u6570\u636e\u6e05\u6d17&#xff09;\u3002<\/li>\n<li>\u5b88\u536b&#xff08;Guard&#xff09;&#xff1a;\u5904\u7406\u6743\u9650\u63a7\u5236&#xff08;\u5982 JWT \u9a8c\u8bc1&#xff09;<\/li>\n<\/ul>\n<li>\u52a8\u6001\u4e0a\u4e0b\u6587\u83b7\u53d6<\/li>\n<ul>\n<li>ExecutionContext \u63d0\u4f9b\u8bf7\u6c42\u65b9\u6cd5\u3001\u7c7b\u3001\u53c2\u6570\u7b49\u5143\u6570\u636e&#xff0c;\u5b9e\u73b0\u7cbe\u51c6\u65e5\u5fd7\u8bb0\u5f55 [6]\u3002<\/li>\n<\/ul>\n<li>\u5168\u5c40\u4e0e\u5c40\u90e8\u5207\u9762\u63a7\u5236<\/li>\n<ul>\n<li>\u5c40\u90e8&#xff1a;\u901a\u8fc7\u63a7\u5236\u5668\/\u65b9\u6cd5\u7ea7 &#064;UseInterceptors() \u5e94\u7528<\/li>\n<li>\u5168\u5c40&#xff1a;\u901a\u8fc7 APP_INTERCEPTOR \u5728\u6a21\u5757\u4e2d\u6ce8\u518c<\/li>\n<\/ul>\n<h4>\u5bf9\u6bd4\u4f20\u7edf OOP \u7684\u4f18\u52bf<\/h4>\n<table>\n<tr>\u65b9\u6848\u4ee3\u7801\u91cd\u590d\u5ea6\u7ef4\u62a4\u6210\u672c\u4e1a\u52a1\u7eaf\u51c0\u5ea6<\/tr>\n<tbody>\n<tr>\n<td>\u76f4\u63a5\u4fee\u6539 Service<\/td>\n<td>\u9ad8 (\u6bcf\u4e2a\u65b9\u6cd5\u6dfb\u52a0\u65e5\u5fd7)<\/td>\n<td>\u9ad8<\/td>\n<td>\u4f4e<\/td>\n<\/tr>\n<tr>\n<td>NestJS AOP<\/td>\n<td>\u96f6\u91cd\u590d<\/td>\n<td>\u4f4e<\/td>\n<td>\u9ad8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u901a\u8fc7 AOP \u5c06\u6a2a\u5207\u5173\u6ce8\u70b9&#xff08;\u65e5\u5fd7\u3001\u6743\u9650\u7b49&#xff09;\u4e0e\u4e1a\u52a1\u903b\u8f91\u89e3\u8026 \u7b26\u5408 \u201c\u5f00\u653e-\u5c01\u95ed\u539f\u5219\u201d&#xff08;\u5bf9\u6269\u5c55\u5f00\u653e&#xff0c;\u5bf9\u4fee\u6539\u5c01\u95ed&#xff09;<\/p>\n<p>\u6269\u5c55\u573a\u666f\u793a\u4f8b<\/p>\n<p>\u6743\u9650\u5b88\u536b&#xff08;Guard&#xff09;<\/p>\n<p><span class=\"token comment\">\/\/ auth.guard.ts <\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> CanActivate<span class=\"token punctuation\">,<\/span> ExecutionContext <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;&#064;nestjs\/common&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#064;<span class=\"token function\">Injectable<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">export<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AuthGuard<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">CanActivate<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token function\">canActivate<\/span><span class=\"token punctuation\">(<\/span>context<span class=\"token operator\">:<\/span> ExecutionContext<span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span> <span class=\"token builtin\">boolean<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> request <span class=\"token operator\">&#061;<\/span> context<span class=\"token punctuation\">.<\/span><span class=\"token function\">switchToHttp<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getRequest<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token function\">validateToken<\/span><span class=\"token punctuation\">(<\/span>request<span class=\"token punctuation\">.<\/span>headers<span class=\"token punctuation\">.<\/span>authorization<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6743\u9650\u9a8c\u8bc1\u903b\u8f91<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5728\u63a7\u5236\u5668\u4e2d\u4f7f\u7528<\/span><br \/>\n&#064;<span class=\"token function\">UseGuards<\/span><span class=\"token punctuation\">(<\/span>AuthGuard<span class=\"token punctuation\">)<\/span><br \/>\n&#064;<span class=\"token function\">Delete<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;:id&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token function\">deleteOrder<\/span><span class=\"token punctuation\">(<\/span>&#064;<span class=\"token function\">Param<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;id&#039;<\/span><span class=\"token punctuation\">)<\/span> id<span class=\"token operator\">:<\/span> <span class=\"token builtin\">string<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token operator\">&#8230;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5f02\u5e38\u8fc7\u6ee4\u5668&#xff08;Exception Filter&#xff09;<\/p>\n<p><span class=\"token comment\">\/\/ http-exception.filter.ts<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token punctuation\">{<\/span> ExceptionFilter<span class=\"token punctuation\">,<\/span> Catch <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">from<\/span> <span class=\"token string\">&#039;&#064;nestjs\/common&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>&#064;<span class=\"token function\">Catch<\/span><span class=\"token punctuation\">(<\/span>HttpException<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">export<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">HttpExceptionFilter<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">ExceptionFilter<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token keyword\">catch<\/span><span class=\"token punctuation\">(<\/span>exception<span class=\"token operator\">:<\/span> HttpException<span class=\"token punctuation\">,<\/span> host<span class=\"token operator\">:<\/span> ArgumentsHost<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> ctx <span class=\"token operator\">&#061;<\/span> host<span class=\"token punctuation\">.<\/span><span class=\"token function\">switchToHttp<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> response <span class=\"token operator\">&#061;<\/span> ctx<span class=\"token punctuation\">.<\/span><span class=\"token function\">getResponse<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    response<span class=\"token punctuation\">.<\/span><span class=\"token function\">status<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">500<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">json<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span> error<span class=\"token operator\">:<\/span> <span class=\"token string\">&#039;\u7edf\u4e00\u9519\u8bef\u5904\u7406&#039;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>NestJS \u7684 AOP \u5b9e\u73b0\u5c42\u6b21<\/h4>\n<li>Middleware&#xff1a;\u5168\u5c40\u8bf7\u6c42\/\u54cd\u5e94\u5904\u7406&#xff08;\u5982 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