{"id":207695,"date":"2025-07-08T13:27:31","date_gmt":"2025-07-08T05:27:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207695\/"},"modified":"2025-07-08T13:27:31","modified_gmt":"2025-07-08T05:27:31","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-golang-%e4%b8%ad%e5%9b%9e%e5%a4%8d-nats-subscribe-%e4%b8%ad%e5%b7%b2%e6%8e%a5%e5%8f%97%e7%9a%84%e8%bf%9e%e6%8e%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207695\/","title":{"rendered":"\u5982\u4f55\u5728 golang \u4e2d\u56de\u590d nats.Subscribe \u4e2d\u5df2\u63a5\u53d7\u7684\u8fde\u63a5"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u5982\u4f55\u5728 golang \u4e2d\u56de\u590d nats.Subscribe \u4e2d\u5df2\u63a5\u53d7\u7684\u8fde\u63a5<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-24 18:54:29<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p><span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5982\u4f55\u5728 golang \u4e2d\u56de\u590d nats.Subscribe \u4e2d\u5df2\u63a5\u53d7\u7684\u8fde\u63a5\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u6b63\u5728\u5c1d\u8bd5\u5728 golang \u4e2d\u521b\u5efa\u4e00\u4e2a tcp \u670d\u52a1\u5668\uff0c\u5b83\u63a5\u53d7\u8fde\u63a5\uff0c\u8bfb\u53d6\u6570\u636e\uff0c\u7136\u540e\u901a\u8fc7 nats.Publish \u53d1\u5e03\u5b83\u3002\u4f46\u6211\u4e5f\u60f3\u56de\u590d\u5e76\u5173\u95ed\u8ba2\u9605\u8005\u5185\u90e8\u7684\u8fde\u63a5\uff0c\u800c\u4e0d\u662f\u5728\u4e3b\u670d\u52a1\u5668\u811a\u672c\u4e2d \u6211\u770b\u5230\u4e24\u79cd\u53ef\u80fd\u7684\u65b9\u6cd5\uff1a\u53d1\u5e03\u8fde\u63a5\u6216\u5728\u8ba2\u9605\u8005\u4e2d\u5efa\u7acb\u65b0\u8fde\u63a5\uff0c\u4f46\u6211\u65e0\u6cd5\u610f\u8bc6\u5230 \u9884\u5148\u611f\u8c22\u60a8<\/p>\n<p>UPD \u5173\u4e8e I. Kozlovic \u56de\u7b54\u7684\u8bc4\u8bba\uff1a \u4e0d\u5b8c\u5168\u662f\u6211\u60f3\u8981\u7684\uff0c\u4f46\u53ef\u80fd\u4f1a\u6709\u6240\u5e2e\u52a9:) \u6211\u6b63\u5728\u5199\u5173\u4e8e\u5173\u95ed tcp \u8fde\u63a5 &#8211; \u4e0d\u662f\u4e00\u4e2a nats \u8fde\u63a5\uff0c\u5e76\u5728\u53e6\u4e00\u4e2a go \u8fdb\u7a0b\u4e2d\u5173\u95ed &#8211; \u4e0d\u662f\u5728\u5b83\u88ab\u63a5\u53d7\u7684\u8fde\u63a5\u4e2d\u3002\u4f46\u7531\u4e8e\u6211\u6ca1\u6709\u6210\u529f\uff0c\u6211\u53ef\u4ee5\u6839\u636e\u60a8\u7684\u56de\u7b54\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a\u6211\u53ef\u4ee5\u901a\u8fc7 nats \u53d1\u5e03\u6211\u9700\u8981\u7684\u4fe1\u606f\uff0c\u5904\u7406\u5b83\uff0c\u7136\u540e\u56de\u590d\u201c\u786e\u5b9a\u3002\u5173\u95ed\u8fde\u63a5\u201d\u5e76\u5173\u95ed\u53d1\u5e03\u8005\u4e2d\u7684 TCP \u8fde\u63a5\uff0c\u8fd9\u662f\u4e00\u4e2a TCP\u670d\u52a1\u5668\u3002\u7136\u800c\uff0c\u5982\u679c\u6211\u4e0d\u662f\u4ece\u8fd9\u4e2a\u6d41\u7a0b\u800c\u662f\u4ece\u53e6\u4e00\u4e2a\u6d41\u7a0b\u8fdb\u884c\u56de\u590d\uff0c\u90a3\u5c31\u592a\u597d\u4e86\u3002\u6211\u7406\u89e3\u8fd9\u5f88\u68d8\u624b\uff0c\u4f46\u6211\u60f3\u505a\u4e0e\u4e0a\u4e00\u6761\u6d88\u606f\u4e2d\u5199\u7684\u76f8\u540c\u7684\u64cd\u4f5c\uff0c\u4f46\u8fdb\u884c\u4e00\u4e9b\u4fee\u6539\u3002\u6211\u6709 TCP \u670d\u52a1\u5668\uff0c\u5b83\u63a5\u53d7\u8fde\u63a5\uff0c\u7136\u540e\u8fde\u63a5 nats \u5e76\u53d1\u5e03\u6d88\u606f\uff0c\u8ba2\u9605\u6b64\u6d88\u606f\u7684\u53e6\u4e00\u4e2a go \u8fdb\u7a0b\u5904\u7406\u8f93\u5165\uff0c\u7136\u540e\u5c06\u5176\u8f93\u51fa\u53d1\u5e03\u5230\u7b2c\u4e09\u4e2a go \u8fdb\u7a0b\uff0c\u8be5\u8fdb\u7a0b\u5904\u7406\u5176\u8f93\u5165\uff0c\u7136\u540e\u56de\u590d\u201c\u786e\u5b9a\u3002\u5b8c\u6210\u3002\u5173\u95ed TCP \u8fde\u63a5\u201d \u201c\u5230\u7b2c\u4e00\u4e2a go \u8fdb\u7a0b&#8230;&#8230;:)<\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u6839\u636e\u60a8\u66f4\u65b0\u7684\u95ee\u9898\uff0c\u8fd9\u662f\u4e00\u79cd\u53ef\u80fd\u7684\u65b9\u6cd5\u3002 \u8bf7\u6ce8\u610f\uff0c\u8fd9\u91cc\u7684\u4e24\u4e2a\u989d\u5916\u8fdb\u7a0b\u7531 go \u4f8b\u7a0b\u8868\u793a\uff0c\u4f46\u5728\u5b9e\u9645\u60c5\u51b5\u4e2d\u60a8\u5c06\u8ba9\u5b83\u4eec\u6210\u4e3a\u5355\u72ec\u7684\u8fdb\u7a0b\u3002 \u6211\u8fd8\u7701\u7565\u4e86\u9519\u8bef\u68c0\u67e5\u3002<\/p>\n<pre>\/\/ This represent what would be the last process in your\n\/\/ example.\ngo func() {\n    nc, _ := nats.Connect(nats.DefaultURL)\n    nc.Subscribe(\"bar\", func(m *nats.Msg) {\n        fmt.Printf(\"Received request: %s, final stop, sending back to %v\\n\", m.Data, m.Reply)\n        nc.Publish(m.Reply, []byte(\"I'm here to help!\"))\n    })\n    nc.Flush()\n    runtime.Goexit()\n}()\n\n\/\/ This would be the in-between process that receives\n\/\/ the message triggered by the TCP accept\ngo func() {\n    nc, _ := nats.Connect(nats.DefaultURL)\n    nc.Subscribe(\"foo\", func(m *nats.Msg) {\n        fmt.Printf(\"Received request: %s, forward to bar\\n\", m.Data)\n        nc.PublishRequest(\"bar\", m.Reply, []byte(fmt.Sprintf(\"got %s\", m.Data)))\n    })\n    nc.Flush()\n    runtime.Goexit()\n}()\n\n\/\/ This would be your TCP server\nl, _ := net.Listen(\"tcp\", \"127.0.0.1:1234\")\nfor {\n    c, _ := l.Accept()\n    go func(c net.Conn) {\n        \/\/ Close socket when done\n        defer c.Close()\n        \/\/ Connect to NATS\n        nc, _ := nats.Connect(nats.DefaultURL)\n        \/\/ Close NATS connection when done\n        defer nc.Close()\n        \/\/ Sends the request to first process. Note that this\n        \/\/ has a timeout and so if no response is received, the\n        \/\/ go-routine will exit, closing the TCP connection.\n        reply, err := nc.Request(\"foo\", []byte(\"help\"), 10*time.Second)\n        if err != nil {\n            fmt.Printf(\"Got error: %v\\n\", err)\n        } else {\n            fmt.Printf(\"Got reply: %s\\n\", reply.Data)\n        }\n    }(c)\n}<\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0c\u901a\u5e38\u4e0d\u5efa\u8bae\u521b\u5efa\u751f\u547d\u5468\u671f\u975e\u5e38\u77ed\u7684 nats \u8fde\u63a5\u3002\u5982\u679c nats \u8fde\u63a5\u9002\u5408\u60a8\u7684\u6a21\u578b\uff0c\u60a8\u53ef\u80fd\u5e0c\u671b\u91cd\u7528\u8be5\u8fde\u63a5\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u5728 golang \u4e2d\u56de\u590d nats.Subscribe \u4e2d\u5df2\u63a5\u53d7\u7684\u8fde\u63a5\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/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-207695","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207695","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=207695"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207695\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}