{"id":35238,"date":"2025-05-03T17:15:50","date_gmt":"2025-05-03T09:15:50","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/35238.html"},"modified":"2025-05-03T17:15:50","modified_gmt":"2025-05-03T09:15:50","slug":"%e7%90%86%e8%a7%a3%e8%ae%a1%e7%ae%97%e6%9c%ba%e7%b3%bb%e7%bb%9f_%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b5_echo%e5%ae%a2%e6%88%b7%e7%ab%af%e5%92%8c%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/35238.html","title":{"rendered":"\u7406\u89e3\u8ba1\u7b97\u673a\u7cfb\u7edf_\u7f51\u7edc\u7f16\u7a0b(5)_echo\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668"},"content":{"rendered":"

\u524d\u8a00 \u00a0 \u00a0 \u00a0 \u00a0<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u4ee5<\u6df1\u5165\u7406\u89e3\u8ba1\u7b97\u673a\u7cfb\u7edf>(\u4ee5\u4e0b\u79f0\u201c\u672c\u4e66\u201d)\u5185\u5bb9\u4e3a\u57fa\u7840，\u5bf9\u7a0b\u5e8f\u7684\u6574\u4e2a\u8fc7\u7a0b\u8fdb\u884c\u68b3\u7406\u3002\u672c\u4e66\u5185\u5bb9\u5bf9\u6574\u4e2a\u8ba1\u7b97\u673a\u7cfb\u7edf\u505a\u4e86\u7cfb\u7edf\u6027\u5bfc\u5f15,\u6bcf\u90e8\u5206\u5185\u5bb9\u90fd\u662f\u5355\u72ec\u7684\u4e00\u95e8\u8bfe.\u5b66\u4e60\u6df1\u5ea6\u6839\u636e\u81ea\u5df1\u9700\u8981\u6765\u5b9a<\/p>\n

\u5f15\u5165<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u63a5\u7eed\u4e0a\u4e00\u7bc7\u7406\u89e3\u8ba1\u7b97\u673a\u7cfb\u7edf_\u7f51\u7edc\u7f16\u7a0b(4)_\u5957\u63a5\u5b57api-CSDN\u535a\u5ba2<\/p>\n

\u4e00\u4e2a\u53eb\u505aecho\u7684\u7f51\u7edc\u7a0b\u5e8f<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u672c\u4e66P662\u7ed9\u51fa\u4e86\u4e00\u4e2a\u7f51\u7edc\u5e94\u7528\u7a0b\u5e8f,\u7531\u5ba2\u6237\u7aef\u7a0b\u5e8f\u548c\u670d\u52a1\u5668\u7aef\u7a0b\u5e8f\u6240\u7ec4\u6210.\u5f53\u8fde\u63a5\u5efa\u7acb\u8d77\u6765\u540e,\u7528Unix I\/O\u51fd\u6570\u8fdb\u884c\u6570\u636e\u4f20\u8f93,\u56e0\u4e3a\u524d\u9762\u6ca1\u6709\u7cfb\u7edf\u7814\u7a76\u8fc7\u8bfb\u5199\u51fd\u6570,\u770b\u522b\u4eba\u662f\u600e\u4e48\u7528\u7684\u4ece\u4e2d\u5b66\u4e60.<\/p>\n

\u9700\u6c42\u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u672c\u4e66\u539f\u8bdd:\u5ba2\u6237\u7aef\u5728\u548c\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u4e4b\u540e,\u5ba2\u6237\u7aef\u8fdb\u5165\u4e00\u4e2a\u5faa\u73af,\u53cd\u590d\u4ece\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u6587\u672c\u884c,\u53d1\u9001\u6587\u672c\u884c\u7ed9\u670d\u52a1\u5668,\u4ece\u670d\u52a1\u5668\u8bfb\u53d6\u56de\u9001\u7684\u884c,\u5e76\u8f93\u51fa\u7ed3\u679c\u5230\u6807\u51c6\u8f93\u51fa.\u00a0\u5f53fgets\u5728\u6807\u51c6\u8f93\u5165\u4e0a\u9047\u5230EOF\u65f6,\u6216\u8005\u56e0\u4e3a\u7528\u6237\u5728\u952e\u76d8\u4e0a\u952e\u5165Ctrl+D,\u6216\u8005\u56e0\u4e3a\u5728\u4e00\u4e2a\u91cd\u5b9a\u5411\u7684\u8f93\u5165\u6587\u4ef6\u4e2d\u7528\u5c3d\u6240\u6709\u7684\u6587\u672c\u884c\u65f6,\u5faa\u73af\u7ec8\u6b62.<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 —fgets\u51fd\u6570\u5728\u6807\u51c6\u4e0a\u9047\u5230EOF\u548c\u56e0\u4e3a\u5728\u4e00\u4e2a\u91cd\u5b9a\u5411\u7684\u8f93\u5165\u6587\u4ef6\u4e2d\u7528\u5c3d\u6240\u6709\u7684\u6587\u672c\u884c,\u597d\u50cf\u662f\u4e00\u4e2a\u610f\u601d,\u5373\u8868\u793a\u5230\u8fbe\u6587\u4ef6\u672b\u5c3e,\u8fd4\u56deNULL.Ctrl+D\u8868\u793a\u88ab\u4e2d\u65ad,\u4e5f\u8fd4\u56deNULL.<\/p>\n

echo\u5ba2\u6237\u7aef\u4ee3\u7801<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u6e90\u7801\u5728\u672c\u4e66P663,\u540d\u79f0\u53ebechoclient.c<\/p>\n

\u4ee3\u7801\u7cbe\u7b80\u7684\u601d\u8003<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u9996\u5148\u6e90\u7801\u662f\u53ef\u4ee5\u7cbe\u7b80\u7684,\u5e76\u4e0d\u662f\u5bf9\u4ee3\u7801\u6709\u8d28\u7591,\u4ed6\u7684\u5199\u6cd5\u8bfb\u8d77\u6765\u5f88\u6e05\u6670.\u5982\u679c\u81ea\u5df1\u5199,\u5728\u719f\u7ec3\u7684\u57fa\u7840\u4e0a\u53ef\u4ee5"\u6d53\u7f29".<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 1>\u53d8\u91cf\u58f0\u660e\u90e8\u5206,\u53bb\u6389clientfd,host,port\u7684\u58f0\u660e<\/p>\n

char buf[MAXLINE]; \/\/\u8868\u793a\u7f13\u51b2\u5b57\u8282\u6570\u7ec4
\nrio_t rio; \/\/\u7f13\u51b2\u533a\u5bf9\u8c61 <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a02>\u53bb\u638913,14\u884c,\u7b2c16\u884c\u7684\u4ee3\u7801\u8fd9\u6837\u5199:<\/p>\n

int clientfd=Open_clientfd(argv[1],argv[2]); <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u4e24\u4e0b\u4e00\u5bf9\u6bd4,\u6e90\u7801\u8868\u8fbe\u7684\u610f\u601d\u66f4\u6e05\u6670.\u6240\u4ee5\u8fd8\u662f\u4e0d\u8981\u7cbe\u7b80\u6bd4\u8f83\u597d.<\/p>\n

\u4ee3\u7801\u89e3\u8bfb<\/h4>\n

\u7b2c9\u523012\u884c<\/h5>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5ba2\u6237\u7aefmain\u51fd\u6570\u67093\u4e2a\u53c2\u6570,\u5982\u679c\u6570\u91cf\u4e0d\u5bf9\u5219\u62a5\u9519.<\/p>\n

\u7b2c13,14\u884c<\/h5>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5176\u4e2dargv[1]\u8868\u793a\u4f20\u7ed9main\u7684\u7b2c2\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570,host—\u670d\u52a1\u5668\u4e3b\u673a\u540d,\u5373\u670d\u52a1\u5668\u57df\u540d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0argv[2]\u8868\u793a\u4f20\u7ed9main\u7684\u7b2c3\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570,port—\u7aef\u53e3\u53f7<\/p>\n

\u7b2c16\u884c\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/h5>\n

clientfd=Open_clientfd(host,port); <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8c03\u7528Open_clientfd\u51fd\u6570,\u5373open_clientfd\u7684\u5305\u88c5\u51fd\u6570,\u5efa\u7acb\u548c\u670d\u52a1\u5668\u7684\u8fde\u63a5,\u5f97\u5230\u53ef\u8bfb\u5199\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26clientfd,\u5177\u4f53\u89c1\u4e0a\u4e00\u5e16.<\/p>\n

\u7b2c17\u884c<\/h5>\n

Rio_readinitb(&rio,clientfd); <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u8c03\u7528rio_readinitb\u7684\u5305\u88c5\u51fd\u6570Rio_readinitb.\u672c\u4e66P628\u7b2c1\u6bb5\u8bb2\u4e86\u8fd9\u4e2a\u51fd\u6570\u7684\u542b\u4e49,\u4ed6\u662f\u56fa\u5b9a\u7528\u6cd5:\u6bcf\u6253\u5f00\u4e00\u4e2a\u63cf\u8ff0\u7b26,\u90fd\u4f1a\u8c03\u7528\u4e00\u6b21rio_readinitb\u51fd\u6570.\u4ed6\u5c06\u63cf\u8ff0\u7b26fd\u548c\u5730\u5740rp\u5904\u7684\u4e00\u4e2a\u7c7b\u578b\u4e3ario_t\u7684\u8bfb\u7f13\u51b2\u533a\u8054\u7cfb\u8d77\u6765—\u9ed1\u4f53\u5b57\u662f\u539f\u8bdd<\/p>\n

====================================\u5185\u5bb9\u5206\u5272\u7ebf\u2193============================<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5173\u4e8eUnix I\/O\u51fd\u6570,\u672c\u4e66\u5728\u8fd9\u4e00\u7ae0\u8282\u4e0a\u6392\u7248\u6bd4\u8f83\u4e71,\u5148\u5927\u6982\u6709\u4e2a\u7406\u89e3,\u4ee5\u540e\u6574\u7406\u518d\u505a\u7cfb\u7edf\u6027\u7684\u5206\u6790.<\/p>\n

====================================\u5185\u5bb9\u5206\u5272\u7ebf\u2191============================<\/p>\n

\u00a0\u7b2c19\u523023\u884c<\/h5>\n

while(Fgets(buf,MAXLINE,stdin)!=NULL){ \/\/\u6807\u51c6\u8f93\u5165(\u952e\u76d8)\u2192buf
\n Rio_writen(clientfd,buf,strlen(buf)); \/\/buf\u2192\u670d\u52a1\u5668\u7aef(\u901a\u8fc7clientfd)
\n Rio_readlineb(&rio,buf,MAXLINE); \/\/\u670d\u52a1\u5668\u7aef\u2192buf(\u901a\u8fc7&rio)
\n Fputs(buf,stdout); \/\/buf\u2192\u6807\u51c6\u8f93\u51fa(\u5c4f\u5e55)
\n} <\/p>\n

—-19\u884c\u00a0<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 Fgets\u51fd\u6570\u8868\u793a\u4ece\u6587\u4ef6\u63cf\u8ff0\u7b26stdin\u4e2d,\u6bcf\u6b21\u8bfb\u53d6MAXLINE-1\u4e2a\u5b57\u8282\u5230\u5b57\u7b26\u6570\u7ec4buf\u4e2d.\u5bf9\u5e94\u53d8\u91cf\u58f0\u660e\u4e2d\u7684char buf[MAXLINE];\u4e5f\u5c31\u662f\u8bf4buf\u63a5\u6536stdin\u4f20\u6765\u7684\u6570\u636e.stdin\u662f\u8868\u793a\u6807\u51c6\u8f93\u5165\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26,\u6574\u578b\u8868\u8fbe\u662f0.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Fgets\u7684\u7ed3\u675f\u6761\u4ef6\u662f:\u6587\u4ef6\u672b\u5c3eEOF\u6216\u8005\u88ab\u4e2d\u65ad.stdin\u662f\u6807\u51c6\u8f93\u5165\u6d41,\u6ca1\u6709\u672b\u5c3e,\u53ea\u6709Ctrl+D\u53ef\u4ee5\u8ba9\u4ed6\u7ed3\u675f(\u7b14\u8005\u4e2a\u4eba\u7406\u89e3).<\/p>\n

—-20\u884c<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 Rio_writen\u662frio_writen\u7684\u5305\u88c5\u51fd\u6570,\u542b\u4e49\u5728\u672c\u4e66P627\u7b2c6\u6bb5\u4e2d\u95f4:rio_wirten\u51fd\u6570\u4ece\u4f4d\u7f6eusrbuf\u4f20\u9001n\u4e2a\u5b57\u8282\u5230\u63cf\u8ff0\u7b26fd.—\u672c\u4e66\u539f\u8bdd.\u56e0\u6b64\u8fd9\u91cc\u7684\u8c03\u7528\u8868\u793a\u5c06buf\u6570\u7ec4\u4e2d\u7684\u6570\u636e\u4f20\u7ed9\u63cf\u8ff0\u7b26clientfd,\u7ed3\u5408\u5411\u5bfc\u56fe\u7406\u89e3,\u6570\u636e\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7aef.\u7ed3\u5408\u7b2c19\u884c\u7684\u4ee3\u7801,\u6807\u51c6\u8f93\u5165\u4e2d\u7684\u5b57\u7b26\u4e32\u53d1\u9001\u5230\u670d\u52a1\u5668\u7aef<\/p>\n

—21\u884c<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0Rio_readlineb\u662frio_readlineb\u7684\u5305\u88c5\u51fd\u6570,\u542b\u4e49\u5728\u672c\u4e66P628\u6700\u540e\u4e00\u6bb5:rio_readlineb\u51fd\u6570\u4ece\u6587\u4ef6rp\u8bfb\u51fa\u4e0b\u4e00\u4e2a\u6587\u672c\u884c(\u5305\u62ec\u7ed3\u5c3e\u7684\u6362\u884c\u7b26),\u5c06\u4ed6\u590d\u5236\u5230\u5185\u5b58\u4f4d\u7f6eusrbuf,\u5e76\u4e14\u7528NULL(\u96f6)\u5b57\u7b26\u6765\u7ed3\u675f\u8fd9\u4e2a\u6587\u672c\u884c.—\u672c\u4e66\u539f\u8bdd.&rio\u662f\u8bfb\u7f13\u51b2\u533a,\u4ee3\u8868\u4ece\u670d\u52a1\u5668\u53d1\u6765\u7684\u6570\u636e,\u8fd9\u91cc\u8868\u793a\u5c06\u6570\u636e\u5199\u5165buf\u4e2d<\/p>\n

—22\u884c<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 Fputs\u662ffputs\u51fd\u6570\u7684\u5305\u88c5\u51fd\u6570,\u8868\u793a\u5c06buf\u5199\u5165\u6807\u51c6\u8f93\u51fa(\u5c4f\u5e55),\u7ed3\u5408\u7b2c21\u884c,\u670d\u52a1\u5668\u7aef\u4f20\u6765\u7684\u6570\u636e\u88ab\u663e\u793a\u5230\u5c4f\u5e55\u4e0a.<\/p>\n

\u90e8\u5206\u5c0f\u7ed3:\u4ee3\u7801\u6ce8\u91ca\u4e86\u6570\u636e\u7684\u8d70\u5411,buf\u5728\u6570\u636e\u4f20\u8f93\u7684\u8fc7\u7a0b\u4e2d\u8d77\u5230\u4e86\u4e34\u65f6\u5b58\u50a8\u7684\u4f5c\u7528.\u540c\u65f6\u601d\u8003:\u524d\u9762\u63d0\u5230\u4e86\u5957\u63a5\u5b57\u662f\u5168\u53cc\u5de5\u7684\u4f20\u8f93,\u4f46\u8fd9\u91cc\u662f\u4e0d\u662f\u6ca1\u6709\u8868\u73b0\u51fa\u6765?\u56e0\u4e3a\u6570\u636e\u7684\u8fdb\u51fa\u90fd\u4f9d\u8d56\u4e8ebuf[MAXLINE].\u00a0<\/p>\n

\u7b2c24\u884c\u00a0<\/h5>\n

Close(clientfd); <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26,\u672c\u6b21\u8fde\u63a5\u7ed3\u675f.\u4e0b\u4e00\u6b21\u8fde\u63a5\u9700\u8981\u91cd\u65b0\u8fd0\u884c\u5ba2\u6237\u7aef\u7a0b\u5e8f.<\/p>\n

====================================\u5185\u5bb9\u5206\u5272\u7ebf\u2193============================<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7b14\u8005\u5728\u8fd9\u91cc\u505a\u4e2a\u7406\u89e3:\u5957\u63a5\u5b57\u8fde\u63a5\u662f\u4e00\u4e2a\u8d44\u6e90\u914d\u5bf9\u7684\u8fc7\u7a0b<\/span>,\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u5404\u81ea\u5206\u914d\u7684\u8d44\u6e90—\u7aef\u53e3port,\u800c\u540e\u62bd\u8c61\u51faclientfd\u548clistenfd\u63cf\u8ff0\u7b26,\u8fd9\u662f\u53cc\u65b9\u8fde\u63a5\u51c6\u5907\u9636\u6bb5\u505a\u7684\u4e8b.\u5f53\u670d\u52a1\u5668\u7aef\u8c03\u7528connect\u5e76\u4e14\u8fde\u63a5\u6210\u529f\u540e,\u5ba2\u6237\u7aef\u751f\u6210connfd\u63cf\u8ff0\u7b26,\u5f00\u59cb\u4f20\u6570\u636e.<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u767d\u8bdd:\u4e24\u8fb9\u627e\u51fa\u53ef\u7528\u7684\u7aef\u53e3,\u5f62\u6210\u63cf\u8ff0\u7b26.\u5ba2\u6237\u7aef\u53d1\u8d77\u8fde\u63a5\u5c1d\u8bd5,\u670d\u52a1\u5668\u7aef\u63a5\u53d7\u540e\u8fde\u63a5\u4ea7\u751f.\u4f46\u8fd8\u8981\u8003\u8651\u5230\u963b\u585e,\u4f8b\u5982\u670d\u52a1\u5668\u7aef\u6700\u5927\u5904\u74061024\u4e2a\u8fde\u63a5,\u8d85\u8fc7\u8fd9\u4e2a\u8d1f\u8377,\u8fde\u63a5\u4e0d\u4f1a\u88ab\u63a5\u53d7\u800c\u5904\u4e8e\u7b49\u5f85(\u963b\u585e)\u72b6\u6001.\u82e5\u7b49\u5f85\u8d85\u65f6\u5219\u8fde\u63a5\u53d6\u6d88\u7b49\u7b49\u72b6\u51b5.\u00a0 \u00a0 \u00a0\u00a0<\/p>\n

====================================\u5185\u5bb9\u5206\u5272\u7ebf\u2191============================<\/p>\n

echo\u670d\u52a1\u5668\u7aef\u4ee3\u7801<\/h3>\n

\u672c\u4e66\u539f\u8bdd:\u5728\u6253\u5f00\u76d1\u542c\u63cf\u8ff0\u7b26\u540e,\u4ed6\u8fdb\u5165\u4e00\u4e2a\u65e0\u9650\u5faa\u73af.\u6bcf\u6b21\u5faa\u73af\u90fd\u7b49\u5f85\u4e00\u4e2a\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42,\u8f93\u51fa\u5df2\u8fde\u63a5\u5ba2\u6237\u7aef\u7684\u57df\u540d\u548cIP\u5730\u5740,\u5e76\u8c03\u7528echo\u51fd\u6570\u4e3a\u8fd9\u4e9b\u5ba2\u6237\u7aef\u670d\u52a1. \u5728echo\u7a0b\u5e8f\u8fd4\u56de\u540e,\u4e3b\u7a0b\u5e8f\u5173\u95ed\u5df2\u8fde\u63a5\u63cf\u8ff0\u7b26.\u4e00\u65e6\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u5173\u95ed\u4e86\u4ed6\u4eec\u5404\u81ea\u7684\u63cf\u8ff0\u7b26,\u8fde\u63a5\u4e5f\u5c31\u7ec8\u6b62\u4e86.—\u9ed1\u4f53\u5b57\u662f\u539f\u8bdd<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 —\u89e3\u8bfb:\u8f93\u51fa\u5df2\u8fde\u63a5\u5ba2\u6237\u7aef\u7684\u57df\u540d\u548cIP\u5730\u5740\u4e0d\u662f\u5fc5\u987b\u7684,\u662f\u7a0b\u5e8f\u8fd9\u6837\u5199\u7684.<\/p>\n

\u4ee3\u7801\u89e3\u8bfb<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5927\u81f4\u548c\u5ba2\u6237\u7aef\u4e5f\u5dee\u4e0d\u4e86\u591a\u5c11.\u8bb2\u6ce8\u610f\u7684\u51e0\u70b9<\/p>\n

1>struct sockaddr_storage<\/h5>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u672c\u4e66\u539f\u8bdd:\u6ce8\u610f,\u6211\u4eec\u5c06clientaddr\u58f0\u660e\u4e3a\u00a0struct sockaddr_storage\u7c7b\u578b,\u800c\u4e0d\u662fstruct sockaddr_in\u7c7b\u578b.\u6839\u636e\u5b9a\u4e49,\u00a0struct sockaddr_storage\u7ed3\u6784\u8db3\u591f\u5927\u80fd\u591f\u88c5\u4e0b\u4efb\u4f55\u7c7b\u578b\u7684\u5957\u63a5\u5b57\u5730\u5740,\u4ee5\u4fdd\u6301\u4ee3\u7801\u7684\u534f\u8bae\u76f8\u5173\u6027.<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 —<\/span>\u89e3\u8bfb:\u6839\u636e\u5b9a\u4e49\u53ef\u4ee5\u8fd9\u4e48\u505a,\u5b9a\u4e49\u662f\u4ec0\u4e48?\u4e5f\u4e0d\u77e5\u9053.\u53ea\u77e5\u9053\u6309\u4e66\u4e0a\u6240\u8bf4\u8fd9\u6837\u53ef\u884c,\u6240\u4ee5\u8fd8\u662f\u8001\u529e\u6cd5"\u6284".<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u672c\u4e66P664\u4ee3\u7801\u7b2c21\u884c\u8c03\u7528\u7684\u5305\u88c5\u51fd\u6570Getnameinfo\u4e2d\u4f7f\u7528\u4e86\u5f3a\u5236\u8f6c\u6362,\u4f7f\u7528(SA *)\u5c06\u00a0struct sockaddr_storage\u7c7b\u578b\u8f6c\u6362\u6210struct sockaddr_in\u7c7b\u578b,\u4ee5\u7b26\u5408\u51fd\u6570\u5bf9\u53c2\u6570\u7c7b\u578b\u7684\u8981\u6c42.<\/p>\n

2>\u8fed\u4ee3\u670d\u52a1\u5668<\/h5>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u672c\u4e66\u539f\u8bdd:\u7b80\u5355\u7684echo\u670d\u52a1\u5668\u4e00\u6b21\u53ea\u80fd\u5904\u7406\u4e00\u4e2a\u5ba2\u6237\u7aef.\u8fd9\u79cd\u7c7b\u578b\u7684\u670d\u52a1\u5668\u4e00\u6b21\u4e00\u4e2a\u5730\u5728\u5ba2\u6237\u7aef\u95f4\u8fed\u4ee3,\u79f0\u4e3a\u8fed\u4ee3\u670d\u52a1\u5668(iterative server).\u5728\u7b2c12\u7ae0\u4e2d,\u6211\u4eec\u5c06\u5b66\u4e60\u5982\u4f55\u5efa\u7acb\u66f4\u52a0\u590d\u6742\u7684\u5e76\u53d1\u670d\u52a1\u5668(concurrent server),\u4ed6\u80fd\u591f\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef.<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 —<\/span>\u89e3\u8bfb:\u6309\u7167\u4e66\u4e2d\u7684\u610f\u601d,\u548c\u4ee3\u7801\u7b2c20\u884c,\u4e00\u4e2a\u5ba2\u6237\u7aef\u7684\u7aef\u53e3\u5bf9\u5e94\u4e00\u4e2a\u670d\u52a1\u5668\u7aef\u53e3,\u4e00\u4e2aclientfd\u63cf\u8ff0\u7b26\u5bf9\u5e94\u4e00\u4e2aconnfd\u63cf\u8ff0\u7b26.\u5f53\u5ba2\u6237\u7aef\u53d1\u6765EOF\u7ec8\u6b62\u4fe1\u53f7\u5e76\u5173\u95edclient\u63cf\u8ff0\u7b26,\u670d\u52a1\u5668\u7aef\u540c\u65f6\u5173\u95edconnfd\u63cf\u8ff0\u7b26,\u8fde\u63a5\u7ed3\u675f.\u4ed6\u4eec\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\u5173\u7cfb.<\/p>\n

3>echo\u51fd\u6570<\/h5>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u672c\u4e66P664\u6709echo\u51fd\u6570\u7684\u5b9a\u4e49,\u548c\u5ba2\u6237\u7aef\u5dee\u4e0d\u591a,\u7528\u4e86Rio_readinitb\u51fd\u6570\u521d\u59cb\u5316\u7f13\u51b2\u533a,Rio_readlineb\u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u4fe1\u606f,Rio_writen\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u4fe1\u606f.<\/p>\n

4>EOF<\/h5>\n

\u00a0 \u00a0 \u00a0 \u00a0 EOF\u662f\u4e00\u79cd\u5185\u6838\u5224\u5b9a\u7684\u6761\u4ef6,\u5217\u4e3e\u4e86\u51e0\u79cd\u60c5\u5f62:<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 1)\u78c1\u76d8\u6587\u4ef6,\u5f53\u524d\u6587\u4ef6\u4f4d\u7f6e\u8d85\u51fa\u6587\u4ef6\u957f\u5ea6\u65f6,\u53d1\u751fEOF<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u6bcf\u4e2a\u6587\u4ef6\u7684\u672b\u5c3e\u90fd\u6709EOF<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 2)\u56e0\u7279\u7f51\u8fde\u63a5,\u5f53\u4e00\u4e2a\u8fdb\u7a0b\u5173\u95ed\u8fde\u63a5\u4ed6\u7684\u90a3\u4e00\u7aef\u65f6,\u53d1\u751fEOF.<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5e94\u7528:\u6839\u636e\u5411\u5bfc\u56fe,\u5ba2\u6237\u7aef\u5148\u7528Ctrl+D\u4ece\u6807\u51c6\u8f93\u5165\u6d41stdin\u4e2d\u8df3\u51fa\u6765,\u7136\u540e\u8c03\u7528Close\u51fd\u6570,\u8fdb\u7a0b\u5173\u95ed,\u53d1\u751fEOF,\u8fd9\u4e2aEOF\u4f3c\u4e4e\u6ca1\u6709\u4ec0\u4e48\u8868\u73b0.<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 3)\u8fde\u63a5\u53e6\u4e00\u7aef\u7684\u8fdb\u7a0b\u5728\u8bd5\u56fe\u8bfb\u53d6\u6d41\u4e2d\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u4e4b\u540e\u7684\u5b57\u8282\u65f6,\u4f1a\u68c0\u6d4b\u5230EOF<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5e94\u7528:\u63a5\u7b2c2)\u6761<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u670d\u52a1\u5668\u7aef\u7684echo\u51fd\u6570\u7b2c10\u884c,\u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u6570\u636e,\u5230\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u540e,\u68c0\u6d4b\u5230EOF,\u8df3\u51fawhile,\u5faa\u73af\u7ed3\u675f,\u63a5\u4e0b\u6765\u6267\u884c\u670d\u52a1\u5668\u7aef\u4e3b\u51fd\u6570\u4e2d\u7684Close(connfd),\u6b64\u65f6\u4e24\u8fb9\u7684\u63cf\u8ff0\u7b26\u5173\u95ed,\u8fde\u63a5\u7ed3\u675f.\u00a0<\/p>\n

while(n=Rio_readlineb(&rio,buf,MAXLINE)!=0) <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 EOF\u548c\u6807\u51c6\u7c7b\u4f3c,\u7531\u7a0b\u5e8f\u5458\u77e5\u9053\u4ec0\u4e48\u65f6\u5019\u51fa\u73b0,\u600e\u4e48\u7528.\u4f46EOF\u662f\u7531\u5e95\u5c42\u5b9e\u73b0(\u786c\u4ef6\u6216\u8005\u5185\u6838),\u4e0d\u5fc5\u5173\u5fc3(\u5f53\u7136\u80fd\u77e5\u9053\u600e\u4e48\u5b9e\u73b0\u66f4\u597d)\u00a0<\/p>\n

\u5c0f\u7ed3<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u4e00\u4e2a\u7f51\u7edc\u901a\u4fe1\u7684\u4f8b\u5b50,\u4ece\u5efa\u7acb\u8fde\u63a5\u5230\u4f20\u9001\u6587\u672c.<\/p>\n<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

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