{"id":207437,"date":"2025-07-08T09:05:23","date_gmt":"2025-07-08T01:05:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207437\/"},"modified":"2025-07-08T09:05:23","modified_gmt":"2025-07-08T01:05:23","slug":"go-net-conn-setwritedeadline%e5%87%bd%e6%95%b0%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207437\/","title":{"rendered":"Go net conn.SetWriteDeadline\u51fd\u6570\u7528\u6cd5"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go net conn.SetWriteDeadline\u51fd\u6570\u7528\u6cd5<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-22 16:45:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587\u300aGo net conn.SetWriteDeadline\u51fd\u6570\u7528\u6cd5\u300b<\/span>\u4e3b\u8981\u8bb2\u89e3\u4e86<\/span>\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u4e0d\u660e\u767d\u5982\u4f55\u4f7f\u7528 net conn.setwritedeadline<\/code> \u51fd\u6570\uff1f<\/p>\n

conn, err := net.dialtimeout(\"tcp\", \"10.1.10.1:2000\", 3*time.second)\n    if err!=nil{\n        fmt.println(\"error: \", err)\n    }\n\/\/waits as expected 3 seconds and returns error if dial not succeeded\n\nconn.setwritedeadline(time.now().add(5*time.second))\n    n, err:= conn.write([]byte{0x00})\n\n    if err != nil {\n        fmt.printf(\"write: %v\", err)\n    }\n\n    fmt.println(\"bytes wrote: \", n)\n\/\/always returns n=1, no wait, no error if connection lost.<\/pre>\n
\u6211\u9884\u8ba1 conn.write<\/code> \u5fc5\u987b\u5c1d\u8bd5\u5728 5 \u79d2\u5185\u5c06\u6570\u636e\u5199\u5165\u7aef\u53e3\uff0c\u7136\u540e\u5982\u679c\u8fde\u63a5\u51fa\u73b0\u95ee\u9898\uff0c\u5b83\u5fc5\u987b\u8fd4\u56de n=0<\/code> \u548c\u9519\u8bef\u3002\u4f46\u662f\uff0c\u5373\u4f7f\u6211\u62d4\u6389\u7f51\u7ebf\uff0c\u5b83\u4e5f\u4e0d\u4f1a\u8fd4\u56de\u4efb\u4f55\u9519\u8bef\uff0c\u5e76\u4e14 n=1<\/code>\u3002<\/p>\n
\u5982\u679c\u6211\u5c1d\u8bd5\u505a\u8fd9\u6837\u7684\u4e8b\u60c5\uff0c<\/p>\n
for {\n        conn.SetWriteDeadline(time.Now().Add(5 * time.Second))\n        n, err = conn.Write(buffer)\n        if err != nil {\n            log.Println(\"Timeout error\")            \n        } else {\n            break\n        }\n        if t.GetElapsed() >= 30*time.Second {\n            err = errors.New(\"Connection timeout\")\n            break\n        }\n    }<\/pre>\n
\u6211\u9884\u8ba1\u5c06\u4f1a\u6709\u591a\u6b21\u5c1d\u8bd5\u5199\u5165\u6570\u636e\uff0c\u5982\u679c\u6210\u529f\u5219\u4ece for<\/code> \u8f6c\u4e49\uff0c\u6216\u8005\u901a\u8fc7\u8d85\u65f6\u8f6c\u4e49\u3002\u4f46\u884c\u4e3a\u662f\u76f8\u540c\u7684 – \u5373\u4f7f\u7f51\u7edc\u65ad\u5f00\uff0c\u4e5f\u6ca1\u6709\u9519\u8bef\uff0c\u53ea\u6709 1<\/code> \u8fed\u4ee3\u3002 \u6211\u7a76\u7adf\u505a\u9519\u4e86\u4ec0\u4e48\uff1f\u5982\u4f55\u4f7f\u7528\uff1f\u5982\u4f55\u5224\u65ad\u6570\u636e\u662f\u5426\u771f\u6b63\u5199\u5165\u7aef\u53e3\uff1f\u5982\u4f55\u5904\u7406\u65ad\u7ebf\u60c5\u51b5\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u60a8\u7684\u5199\u5165\u5df2\u88ab TCP \u5806\u6808\u63a5\u53d7\uff0c\u8be5\u5806\u6808\u73b0\u5728\u62e5\u6709\u81ea\u5df1\u7684\u673a\u5236\u6765\u5904\u7406\u91cd\u8bd5\u548c\u5931\u8d25\u3002\u5199\u5165\u622a\u6b62\u65e5\u671f\u5e76\u4e0d\u80fd\u9632\u6b62\u60a8\u521b\u5efa\u7684\u6761\u4ef6\u3002\u5982\u679c\u60a8\u671f\u671b\u4e0e\u60a8\u901a\u4fe1\u7684\u5bf9\u7b49\u65b9\u505a\u51fa\u54cd\u5e94\uff0c\u8bf7\u4f7f\u7528\u9605\u8bfb\u622a\u6b62\u65e5\u671f\u3002\u5982\u679c\u8fde\u63a5\u88ab\u5bf9\u7b49\u65b9\u7ec8\u6b62\uff0c\u5219\u8bfb\u53d6\u6216\u5199\u5165\u90fd\u5e94\u8bc6\u522b\u6b64\u60c5\u51b5\u5e76\u51fa\u73b0\u9519\u8bef\u3002\u7b80\u5355\u5730\u65ad\u5f00\u7f51\u7edc\u4e0d\u4f1a\u4f7f\u8fd9\u79cd\u60c5\u51b5\u53ca\u65f6\u53d1\u751f\uff0c\u4f46\u5982\u679c\u4f7f\u7528 TCP \u8d85\u65f6\uff0c\u65ad\u5f00\u8fde\u63a5\u6700\u7ec8\u4f1a\u89e6\u53d1\u9519\u8bef\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300aGo net conn.SetWriteDeadline\u51fd\u6570\u7528\u6cd5\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207437","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207437","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207437"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207437\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207437"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207437"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}