{"id":19643,"date":"2025-04-19T02:06:33","date_gmt":"2025-04-18T18:06:33","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/19643.html"},"modified":"2025-04-19T02:06:33","modified_gmt":"2025-04-18T18:06:33","slug":"c%e9%a1%b9%e7%9b%ae-%e9%9b%86%e7%be%a4%e8%81%8a%e5%a4%a9%e6%9c%8d%e5%8a%a1%e5%99%a8-%e7%94%a8%e6%88%b7%e7%99%bb%e5%bd%95%e4%b8%9a%e5%8a%a1-%e8%ae%b0%e5%bd%95%e7%94%a8%e6%88%b7","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/19643.html","title":{"rendered":"C++\u9879\u76ee | \u96c6\u7fa4\u804a\u5929\u670d\u52a1\u5668 | \u7528\u6237\u767b\u5f55\u4e1a\u52a1 &amp;&amp; \u8bb0\u5f55\u7528\u6237\u7684\u8fde\u63a5\u4fe1\u606f\u4ee5\u53ca\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898"},"content":{"rendered":"<h2>C&#043;&#043;\u9879\u76ee | \u96c6\u7fa4\u804a\u5929\u670d\u52a1\u5668 | \u7528\u6237\u767b\u5f55\u4e1a\u52a1 &amp;&amp; \u8bb0\u5f55\u7528\u6237\u7684\u8fde\u63a5\u4fe1\u606f\u4ee5\u53ca\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/h2>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>C&#043;&#043;\u9879\u76ee | \u96c6\u7fa4\u804a\u5929\u670d\u52a1\u5668 | \u7528\u6237\u767b\u5f55\u4e1a\u52a1 &amp;&amp; \u8bb0\u5f55\u7528\u6237\u7684\u8fde\u63a5\u4fe1\u606f\u4ee5\u53ca\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/li>\n<li>\n<ul>\n<li>1.query\u51fd\u6570<\/li>\n<li>2.updateState\u51fd\u6570<\/li>\n<li>3.login\u51fd\u6570<\/li>\n<li>4.\u6d4b\u8bd5<\/li>\n<li>\n<ul>\n<li>\u7528\u6237\u5df2\u7ecf\u767b\u5f55<\/li>\n<li>\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef<\/li>\n<li>\u767b\u5f55\u6210\u529f<\/li>\n<\/ul>\n<\/li>\n<li>5.\u8bb0\u5f55\u7528\u6237\u7684\u8fde\u63a5\u4fe1\u606f\u4ee5\u53ca\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/li>\n<li>\n<ul>\n<li>chatservice.hpp\u4fee\u6539\u5185\u5bb9<\/li>\n<li>chatservice.cpp\u4fee\u6539\u5185\u5bb9<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>1.query\u51fd\u6570<\/h3>\n<p>\u529f\u80fd&#xff1a;\u6839\u636e\u7528\u6237\u53f7\u7801\u67e5\u8be2\u7528\u6237\u4fe1\u606f<\/p>\n<p>\u5c01\u88c5sql\u7684select\u67e5\u8be2\u8bed\u53e5<\/p>\n<p>\u628a\u67e5\u8be2\u7ed3\u679c\u5c01\u88c5\u5230User\u4e2d\u8fd4\u56de<\/p>\n<p>\u6ca1\u67e5\u8be2\u5230\u5c31\u8fd4\u56de\u9ed8\u8ba4\u7ed3\u679c(id&#061;&#061;-1)<\/p>\n<p><span class=\"token comment\">\/\/usermodel.cpp<\/span><br \/>\n<span class=\"token comment\">\/\/\u6839\u636e\u7528\u6237\u53f7\u7801\u67e5\u8be2\u7528\u6237\u4fe1\u606f<\/span><br \/>\nUser <span class=\"token class-name\">UserModel<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">query<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> id<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/\u6839\u636e\u7528\u6237\u53f7\u7801\u67e5\u8be2\u7528\u6237\u4fe1\u606f<\/span><br \/>\n    <span class=\"token comment\">\/\/1.\u7ec4\u88c5sql\u8bed\u53e5<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> sql<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">sprintf<\/span><span class=\"token punctuation\">(<\/span>sql<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;select * from user where id &#061; %d&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    MySQL mysql<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5efa\u7acb\u8fde\u63a5<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>mysql<span class=\"token punctuation\">.<\/span><span class=\"token function\">connect<\/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 comment\">\/\/\u83b7\u53d6\u7ed3\u679c<\/span><br \/>\n        MYSQL_RES <span class=\"token operator\">*<\/span>res<span class=\"token operator\">&#061;<\/span>mysql<span class=\"token punctuation\">.<\/span><span class=\"token function\">query<\/span><span class=\"token punctuation\">(<\/span>sql<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>res<span class=\"token operator\">!&#061;<\/span><span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u53d6\u51fa\u7ed3\u679c<\/span><br \/>\n            MYSQL_ROW row<span class=\"token operator\">&#061;<\/span><span class=\"token function\">mysql_fetch_row<\/span><span class=\"token punctuation\">(<\/span>res<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>row<span class=\"token operator\">!&#061;<\/span><span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                User user<span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token comment\">\/\/row\u62ff\u51fa\u6765\u7684\u662f\u4e00\u884c\u8bb0\u5f55<\/span><br \/>\n                user<span class=\"token punctuation\">.<\/span><span class=\"token function\">setId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">atoi<\/span><span class=\"token punctuation\">(<\/span>row<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                user<span class=\"token punctuation\">.<\/span><span class=\"token function\">setName<\/span><span class=\"token punctuation\">(<\/span>row<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                user<span class=\"token punctuation\">.<\/span><span class=\"token function\">setPwd<\/span><span class=\"token punctuation\">(<\/span>row<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                user<span class=\"token punctuation\">.<\/span><span class=\"token function\">setState<\/span><span class=\"token punctuation\">(<\/span>row<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token comment\">\/\/\u91ca\u653e\u8d44\u6e90<\/span><br \/>\n                <span class=\"token function\">mysql_free_result<\/span><span class=\"token punctuation\">(<\/span>res<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> user<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/\u6ca1\u67e5\u8be2\u5230\u7ed3\u679c<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token function\">User<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>2.updateState\u51fd\u6570<\/h3>\n<p>\u4fee\u6539\u7528\u6237\u5728\u7ebf\u72b6\u6001<\/p>\n<p>\u5c01\u88c5sql\u8bed\u53e5&#xff0c;\u7528\u6237\u767b\u5f55\u540e\u72b6\u6001\u6539\u4e3a\u5728\u7ebf<\/p>\n<p><span class=\"token comment\">\/\/\u66f4\u65b0\u7528\u6237\u7684\u72b6\u6001\u4fe1\u606f<\/span><br \/>\n<span class=\"token keyword\">bool<\/span> <span class=\"token class-name\">UserModel<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">updateState<\/span><span class=\"token punctuation\">(<\/span>User user<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/1.\u7ec4\u88c5sql\u8bed\u53e5<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> sql<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">sprintf<\/span><span class=\"token punctuation\">(<\/span>sql<span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;update user set state &#061; &#039;%s&#039; where id &#061; %d&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    MySQL mysql<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>mysql<span class=\"token punctuation\">.<\/span><span class=\"token function\">connect<\/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 keyword\">if<\/span><span class=\"token punctuation\">(<\/span>mysql<span class=\"token punctuation\">.<\/span><span class=\"token function\">update<\/span><span class=\"token punctuation\">(<\/span>sql<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>3.login\u51fd\u6570<\/h3>\n<p>1.json\u4e2d\u7684id\u9ed8\u8ba4\u662f\u5b57\u7b26\u4e32\u8981\u8f6c\u4e3aint<\/p>\n<p>2.id&#061;&#061;-1\u8868\u793a\u6ca1\u6709\u8fd9\u4e2a\u7528\u6237<\/p>\n<p>3.\u8c03\u7528query\u67e5\u8be2id\u5bf9\u5e94\u7684user<\/p>\n<p>4.\u5728\u7ebf\u72b6\u6001\u4e3aoffline\u624d\u767b\u5f55&#xff0c;\u4e0d\u7136\u5c31\u662f\u767b\u5f55\u5931\u8d25<\/p>\n<p>5.\u6ca1\u67e5\u5230id\u8bf4\u660e\u6ca1\u6709\u8fd9\u4e2a\u8d26\u6237<\/p>\n<p><span class=\"token comment\">\/\/chatservice.cpp<\/span><br \/>\n<span class=\"token comment\">\/\/\u5904\u7406\u767b\u5f55\u4e1a\u52a1<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token class-name\">ChatService<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">login<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> TcpConnectionPtr<span class=\"token operator\">&amp;<\/span> conn<span class=\"token punctuation\">,<\/span>json <span class=\"token operator\">&amp;<\/span>js<span class=\"token punctuation\">,<\/span>Timestamp time<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> id<span class=\"token operator\">&#061;<\/span>js<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;id&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token generic-function\"><span class=\"token function\">get<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    string pwd<span class=\"token operator\">&#061;<\/span>js<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;password&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    User user<span class=\"token operator\">&#061;<\/span>_userModel<span class=\"token punctuation\">.<\/span><span class=\"token function\">query<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/id&#061;&#061;-1 \u8868\u793a\u6ca1\u627e\u7740<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#061;&#061;<\/span>id <span class=\"token operator\">&amp;&amp;<\/span> user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getPwd<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#061;&#061;<\/span>pwd<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">&#061;&#061;<\/span><span class=\"token string\">&#034;online&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u8be5\u7528\u6237\u5df2\u7ecf\u767b\u5f55&#xff0c;\u4e0d\u5141\u8bb8\u91cd\u590d\u767b\u5f55<\/span><br \/>\n            json response<span class=\"token punctuation\">;<\/span><br \/>\n            response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;msgid&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>LOGIN_MSG_ACK<span class=\"token punctuation\">;<\/span><br \/>\n            response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;errno&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;errmsg&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u8be5\u7528\u6237\u5df2\u7ecf\u767b\u5f55&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165\u65b0\u8d26\u53f7&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            conn<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">.<\/span><span class=\"token function\">dump<\/span><span class=\"token punctuation\">(<\/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 keyword\">else<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/\u767b\u5f55\u6210\u529f,\u66f4\u65b0\u7528\u6237\u72b6\u6001\u4fe1\u606f<\/span><br \/>\n            user<span class=\"token punctuation\">.<\/span><span class=\"token function\">setState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;online&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            _userModel<span class=\"token punctuation\">.<\/span><span class=\"token function\">updateState<\/span><span class=\"token punctuation\">(<\/span>user<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            json response<span class=\"token punctuation\">;<\/span><br \/>\n            response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;msgid&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>LOGIN_MSG_ACK<span class=\"token punctuation\">;<\/span><br \/>\n            response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;errno&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;id&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getId<\/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 string\">&#034;name&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>user<span class=\"token punctuation\">.<\/span><span class=\"token function\">getName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            conn<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">.<\/span><span class=\"token function\">dump<\/span><span class=\"token punctuation\">(<\/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><br \/>\n    <span class=\"token keyword\">else<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/\u767b\u5f55\u5931\u8d25 \u8be5\u7528\u6237\u4e0d\u5b58\u5728\u6216\u8005\u7528\u6237\u5b58\u5728\u4f46\u5bc6\u7801\u9519\u8bef<\/span><br \/>\n        json response<span class=\"token punctuation\">;<\/span><br \/>\n        response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;msgid&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span>LOGIN_MSG_ACK<span class=\"token punctuation\">;<\/span><br \/>\n        response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;errno&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        response<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;errmsg&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u7528\u6237\u540d\u6216\u8005\u5bc6\u7801\u9519\u8bef&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        conn<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">send<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">.<\/span><span class=\"token function\">dump<\/span><span class=\"token punctuation\">(<\/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<h3>4.\u6d4b\u8bd5<\/h3>\n<p><span class=\"token comment\">\/\/\u767b\u5f55\u6210\u529f<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;msgid&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;id&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;password&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token string\">&#034;123456&#034;<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token comment\">\/\/\u6ca1\u6709\u8be5\u7528\u6237<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;msgid&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;id&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">&#034;password&#034;<\/span><span class=\"token operator\">:<\/span><span class=\"token string\">&#034;123456&#034;<\/span><span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u6d4b\u8bd5\u5b8c\u6210\u4ee5\u540e\u6539\u56de\u672a\u767b\u5f55\u72b6\u6001<\/span><br \/>\nupdate user set state <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;offline&#039;<\/span> where id <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><\/p>\n<h4>\u7528\u6237\u5df2\u7ecf\u767b\u5f55<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418180632-680294a84c953.png\" alt=\"image-20250119161241946\" \/><\/p>\n<h4>\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418180632-680294a8646b6.png\" alt=\"image-20250119161317003\" \/><\/p>\n<h4>\u767b\u5f55\u6210\u529f<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418180632-680294a882023.png\" alt=\"image-20250119161353164\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418180632-680294a8987fa.png\" alt=\"image-20250119161424535\" \/><\/p>\n<h3>5.\u8bb0\u5f55\u7528\u6237\u7684\u8fde\u63a5\u4fe1\u606f\u4ee5\u53ca\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/h3>\n<p>\u4e3a\u4ec0\u4e48\u8981\u8bb0\u5f55\u7528\u6237\u7684\u8fde\u63a5\u4fe1\u606f&#xff1f;<\/p>\n<p>\u4e00\u4e2a\u7528\u6237\u767b\u5f55\u540e\u670d\u52a1\u5668\u8981\u8bb0\u5f55\u7528\u6237\u7684\u8fde\u63a5\u4fe1\u606f<\/p>\n<p>\u5982\u679cA\u548cB\u7528\u6237\u53d1\u9001\u6d88\u606f&#xff0c;\u800c\u670d\u52a1\u5668\u4e0d\u77e5\u9053A\u7528\u6237\u7684\u8fde\u63a5\u7684\u8bdd\u5c31\u65e0\u6cd5\u786e\u5207\u7684\u628aB\u7684\u6d88\u606f\u53d1\u7ed9A<\/p>\n<p>\u6240\u4ee5chatServer\u662f\u4e00\u4e2a\u957f\u8fde\u63a5\u7684\u670d\u52a1\u5668&#xff0c;\u53ea\u8981\u7528\u6237\u767b\u5f55\u7740&#xff0c;\u90a3\u8fd9\u4e2aTcp\u8fde\u63a5\u5c31\u4f1a\u4fdd\u6301\u7740<\/p>\n<p>\u800c\u4e00\u4e2a\u7528\u6237\u63a5\u6536\u53e6\u4e00\u4e2a\u7528\u6237\u7684\u6d88\u606f\u80af\u5b9a\u662f\u670d\u52a1\u5668\u63a8\u7ed9\u7528\u6237\u7684&#xff0c;\u800c\u4e0d\u662f\u7528\u6237\u4ece\u670d\u52a1\u5668\u4e0a\u9762\u62c9\u53d6\u7684\u3002<\/p>\n<h4>chatservice.hpp\u4fee\u6539\u5185\u5bb9<\/h4>\n<p>\u52a0\u5165\u4e86\u8bb0\u5f55\u7528\u6237\u8fde\u63a5\u7684userConnMap<\/p>\n<p>\u4e3a\u786e\u4fdduserConnMap\u7684\u7ebf\u7a0b\u5b89\u5168\u52a0\u5165mutex<\/p>\n<p><span class=\"token comment\">\/\/chatservice.hpp<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifndef<\/span> <span class=\"token expression\">CHATSERVICE_H<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">CHATSERVICE_H<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;muduo\/net\/TcpConnection.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;unordered_map&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;functional&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span><span class=\"token string\">&lt;mutex&gt;<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span><span class=\"token string\">&#034;json.hpp&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span><span class=\"token string\">&#034;usermodel.hpp&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> muduo<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> muduo<span class=\"token double-colon punctuation\">::<\/span>net<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">using<\/span> json<span class=\"token operator\">&#061;<\/span>nlohmann<span class=\"token double-colon punctuation\">::<\/span>json<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> MsgHandler<span class=\"token operator\">&#061;<\/span>std<span class=\"token double-colon punctuation\">::<\/span>function<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> TcpConnectionPtr<span class=\"token operator\">&amp;<\/span> conn<span class=\"token punctuation\">,<\/span>json <span class=\"token operator\">&amp;<\/span>js<span class=\"token punctuation\">,<\/span>Timestamp<span class=\"token punctuation\">)<\/span><span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/\u804a\u5929\u670d\u52a1\u5668\u4e1a\u52a1\u7c7b \u5355\u4f8b\u6a21\u5f0f\u6765\u5b9e\u73b0<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ChatService<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token comment\">\/\/\u83b7\u53d6\u5355\u4f8b\u5bf9\u8c61\u7684\u63a5\u53e3\u51fd\u6570<\/span><br \/>\n    <span class=\"token keyword\">static<\/span> ChatService<span class=\"token operator\">*<\/span> <span class=\"token function\">instance<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5904\u7406\u767b\u5f55\u4e1a\u52a1<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">login<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> TcpConnectionPtr<span class=\"token operator\">&amp;<\/span> conn<span class=\"token punctuation\">,<\/span>json <span class=\"token operator\">&amp;<\/span>js<span class=\"token punctuation\">,<\/span>Timestamp time<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5904\u7406\u6ce8\u518c\u4e1a\u52a1<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">reg<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> TcpConnectionPtr<span class=\"token operator\">&amp;<\/span> conn<span class=\"token punctuation\">,<\/span>json <span class=\"token operator\">&amp;<\/span>js<span class=\"token punctuation\">,<\/span>Timestamp time<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u83b7\u53d6\u6d88\u606f\u5bf9\u5e94\u7684\u5904\u7406\u5668<\/span><br \/>\n    MsgHandler <span class=\"token function\">getHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> msgid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">ChatService<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/\u5b58\u50a8\u6d88\u606fid\u548c\u5176\u5bf9\u5e94\u7684\u4e1a\u52a1\u5904\u7406\u65b9\u6cd5<\/span><br \/>\n    unordered_map<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">,<\/span>MsgHandler<span class=\"token operator\">&gt;<\/span> _msgHandlerMap<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/\u6570\u636e\u64cd\u4f5c\u7c7b\u5bf9\u8c61<\/span><br \/>\n    UserModel _userModel<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/\u5b9a\u4e49\u4e92\u65a5\u9501&#xff0c;\u4fdd\u8bc1_userConnMap\u7684\u7ebf\u7a0b\u5b89\u5168<\/span><br \/>\n    mutex _connMutex<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/\u5b58\u50a8\u5728\u7ebf\u7528\u6237\u7684\u901a\u4fe1\u8fde\u63a5<\/span><br \/>\n    unordered_map<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token punctuation\">,<\/span>TcpConnectionPtr<span class=\"token operator\">&gt;<\/span> _userConnMap<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<h4>chatservice.cpp\u4fee\u6539\u5185\u5bb9<\/h4>\n<p>\u52a0\u7684\u5185\u5bb9\u90fd\u662f\u4e3a\u4e86\u4fdd\u8bc1_userConnMap\u7684\u7ebf\u7a0b\u5b89\u5168\u64cd\u4f5c<\/p>\n<p>mysql\u64cd\u4f5c\u7ebf\u7a0b\u5b89\u5168\u7531mysql server\u4fdd\u8bc1<\/p>\n<p>json\u90fd\u662f\u5c40\u90e8\u53d8\u91cf&#xff0c;\u7ebf\u7a0b\u7684\u6808\u662f\u81ea\u5df1\u7684&#xff0c;\u6240\u4ee5\u4e0d\u9700\u8981\u7ebf\u7a0b\u5b89\u5168<\/p>\n<p>\u53ef\u662f\u628a\u8fd9\u4e9b\u64cd\u4f5c\u90fd\u653e\u5728\u9501\u7684\u4f5c\u7528\u8303\u56f4\u9501\u7684\u7c92\u5ea6\u592a\u5927\u4e86&#xff0c;\u6240\u4ee5\u52a0\u4e2a\u5927\u62ec\u53f7&#xff0c;\u9501\u51fa\u4e86\u4f5c\u7528\u57df\u81ea\u52a8\u91ca\u653e\u8d44\u6e90\u4e86<\/p>\n<p><span class=\"token comment\">\/\/mysql\u64cd\u4f5c\u7ebf\u7a0b\u5b89\u5168\u7531mysql server\u4fdd\u8bc1<\/span><br \/>\n<span class=\"token comment\">\/\/json\u90fd\u662f\u5c40\u90e8\u53d8\u91cf&#xff0c;\u7ebf\u7a0b\u7684\u6808\u662f\u81ea\u5df1\u7684&#xff0c;\u6240\u4ee5\u4e0d\u9700\u8981\u7ebf\u7a0b\u5b89\u5168<\/span><br \/>\n<span class=\"token comment\">\/\/\u53ef\u662f\u90fd\u653e\u5728\u9501\u7684\u4f5c\u7528\u8303\u56f4\u9501\u7684\u7c92\u5ea6\u592a\u5927\u4e86&#xff0c;\u6240\u4ee5\u52a0\u4e2a\u5927\u62ec\u53f7&#xff0c;\u9501\u51fa\u4e86\u4f5c\u7528\u57df\u81ea\u52a8\u91ca\u653e\u8d44\u6e90\u4e86<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/\u767b\u5f55\u6210\u529f&#xff0c;\u8bb0\u5f55\u7528\u6237\u8fde\u63a5\u4fe1\u606f<\/span><br \/>\nlock_guard<span class=\"token operator\">&lt;<\/span>mutex<span class=\"token operator\">&gt;<\/span> <span class=\"token function\">lock<\/span><span class=\"token punctuation\">(<\/span>_connMutex<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n_userConnMap<span class=\"token punctuation\">.<\/span><span class=\"token function\">insert<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span>id<span class=\"token punctuation\">,<\/span>conn<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/chatservice.cpp<\/span><br \/>\n<span class=\"token comment\">\/\/\u5904\u7406\u767b\u5f55\u4e1a\u52a1<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token class-name\">ChatService<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">login<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> TcpConnectionPtr<span class=\"token operator\">&amp;<\/span> conn<span class=\"token punctuation\">,<\/span>json <span class=\"token operator\">&amp;<\/span>js<span class=\"token punctuation\">,<\/span>Timestamp time<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> id<span class=\"token operator\">&#061;<\/span>js<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;id&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span class=\"token generic-function\"><span class=\"token function\">get<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    string pwd<span class=\"token operator\">&#061;<\/span>js<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;password&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    User user<span class=\"token operator\">&#061;<\/span>_userModel<span class=\"token punctuation\">.<\/span><span 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