{"id":205875,"date":"2025-06-12T10:38:15","date_gmt":"2025-06-12T02:38:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205875\/"},"modified":"2025-06-12T10:38:15","modified_gmt":"2025-06-12T02:38:15","slug":"golang-%e5%87%bd%e6%95%b0%e7%9a%84%e8%b6%85%e6%97%b6%e5%92%8c%e9%87%8d%e8%af%95%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205875\/","title":{"rendered":"Golang \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565"},"content":{"rendered":"<p>\u5bf9\u4e8e\u4e00\u4e2aGOLANG\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0cGOLANG\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aGOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730026485671e1bf5d307d.jpg\" class=\"aligncenter\">,<br \/>\n<strong>GOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565<\/strong>,\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u5904\u7406\u56e0\u7f51\u7edc\u95ee\u9898\u6216\u5176\u4ed6\u56e0\u7d20\u5bfc\u81f4\u7684\u5931\u8d25\u81f3\u5173\u91cd\u8981\u3002Go \u63d0\u4f9b\u4e86\u5185\u7f6e\u529f\u80fd\u6765\u5b9e\u73b0\u51fd\u6570\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u3002,<br \/>\n<strong>\u8d85\u65f6\u5904\u7406<\/strong>,\u4f7f\u7528<br \/>\n<code>context<\/code> \u5305\u53ef\u4ee5\u8bbe\u7f6e\u51fd\u6570\u6267\u884c\u7684\u8d85\u65f6\u3002<br \/>\n<code>context<\/code> \u5305\u5b9a\u4e49\u4e86<br \/>\n<code>Context<\/code> \u63a5\u53e3\uff0c\u5b83\u63d0\u4f9b\u4e86\u8bf7\u6c42\u7684\u53d6\u6d88\u548c\u8d85\u65f6\u529f\u80fd\u3002,<br \/>\n<strong>\u91cd\u8bd5\u7b56\u7565<\/strong>,Go \u63d0\u4f9b\u4e86<br \/>\n<code>sync\/atomic<\/code> \u5305\u6765\u8fdb\u884c\u539f\u5b50\u64cd\u4f5c\u3002\u53ef\u4ee5\u4f7f\u7528<br \/>\n<code>sync\/atomic<\/code> \u539f\u5b50\u5730\u66f4\u65b0\u91cd\u8bd5\u6b21\u6570\u3002\u8fd8\u53ef\u4ee5\u4f7f\u7528<br \/>\n<code>time<\/code> \u5305\u6765\u5f15\u5165\u91cd\u8bd5\u5ef6\u8fdf\u3002,<br \/>\n<strong>\u5b9e\u6218\u6848\u4f8b<\/strong>,\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u7684\u771f\u5b9e\u4e16\u754c\u793a\u4f8b\uff1a,\u4eca\u5929\u5173\u4e8e\u300aGOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u91cd\u8bd5\u7b56\u7565,\u8d85\u65f6\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01,GOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565,\u5bf9\u4e8e\u4e00\u4e2aGOLANG\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0cGOLANG\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aGOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01,<br \/>\n<b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span> <span>GOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565<\/span><\/p>\n<h1>GOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565<\/h1>\n<p><span>2024-10-27 18:55:00<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u5bf9\u4e8e\u4e00\u4e2aGOLANG\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0cGOLANG\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aGOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730026485671e1bf5d307d.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>GOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565<\/strong><\/p>\n<p>\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u5904\u7406\u56e0\u7f51\u7edc\u95ee\u9898\u6216\u5176\u4ed6\u56e0\u7d20\u5bfc\u81f4\u7684\u5931\u8d25\u81f3\u5173\u91cd\u8981\u3002Go \u63d0\u4f9b\u4e86\u5185\u7f6e\u529f\u80fd\u6765\u5b9e\u73b0\u51fd\u6570\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u3002<\/p>\n<p><strong>\u8d85\u65f6\u5904\u7406<\/strong><\/p>\n<p>\u4f7f\u7528 <code>context<\/code> \u5305\u53ef\u4ee5\u8bbe\u7f6e\u51fd\u6570\u6267\u884c\u7684\u8d85\u65f6\u3002<code>context<\/code> \u5305\u5b9a\u4e49\u4e86 <code>Context<\/code> \u63a5\u53e3\uff0c\u5b83\u63d0\u4f9b\u4e86\u8bf7\u6c42\u7684\u53d6\u6d88\u548c\u8d85\u65f6\u529f\u80fd\u3002<\/p>\n<pre>import (\n    \"context\"\n    \"log\"\n    \"time\"\n)\n\n\/\/ \u8d85\u65f6\u51fd\u6570\nfunc timeoutFunc(ctx context.Context) {\n    \/\/ \u6a21\u62df\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4efb\u52a1\n    for {\n        select {\n        case &lt;-ctx.Done():\n            log.Println(\"Function timed out\")\n            return\n        default:\n            \/\/ \u4efb\u52a1\u903b\u8f91\n        }\n    }\n}\n\n\/\/ \u5e26\u8d85\u65f6\u7684 main \u51fd\u6570\nfunc main() {\n    \/\/ \u8bbe\u7f6e 5 \u79d2\u8d85\u65f6\n    ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)\n    defer cancel()\n\n    \/\/ \u8c03\u7528\u5e26\u8d85\u65f6\u7684\u51fd\u6570\n    timeoutFunc(ctx)\n}<\/pre>\n<p><strong>\u91cd\u8bd5\u7b56\u7565<\/strong><\/p>\n<p>Go \u63d0\u4f9b\u4e86 <code>sync\/atomic<\/code> \u5305\u6765\u8fdb\u884c\u539f\u5b50\u64cd\u4f5c\u3002\u53ef\u4ee5\u4f7f\u7528 <code>sync\/atomic<\/code> \u539f\u5b50\u5730\u66f4\u65b0\u91cd\u8bd5\u6b21\u6570\u3002\u8fd8\u53ef\u4ee5\u4f7f\u7528 <code>time<\/code> \u5305\u6765\u5f15\u5165\u91cd\u8bd5\u5ef6\u8fdf\u3002<\/p>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u7684\u771f\u5b9e\u4e16\u754c\u793a\u4f8b\uff1a<\/p>\n<pre>import (\n    \"context\"\n    \"log\"\n    \"sync\/atomic\"\n    \"time\"\n)\n\n\/\/ \u91cd\u8bd5\u51fd\u6570\nfunc retryFunc(ctx context.Context) {\n    retries := int64(0)\n\n    for {\n        \/\/ \u6a21\u62df\u8c03\u7528\u8fdc\u7a0b\u670d\u52a1\n        response, err := callRemoteService()\n        if err != nil {\n            \/\/ \u5982\u679c\u53d1\u751f\u9519\u8bef\uff0c\u5219\u589e\u52a0\u91cd\u8bd5\u6b21\u6570\u5e76\u91cd\u8bd5\n            atomic.AddInt64(&amp;retries, 1)\n\n            \/\/ \u5f15\u5165\u91cd\u8bd5\u5ef6\u8fdf\n            time.Sleep(time.Duration(retries) * time.Second)\n\n            \/\/ \u68c0\u67e5\u91cd\u8bd5\u662f\u5426\u8d85\u8fc7\u9650\u5236\n            if retries &gt;= 3 {\n                log.Println(\"Exceeded retry limit\")\n                return\n            }\n\n            continue\n        }\n\n        \/\/ \u6210\u529f\u5219\u8fd4\u56de\u54cd\u5e94\n        return response\n    }\n}\n\n\/\/ \u8c03\u7528\u8fdc\u7a0b\u670d\u52a1\u7684\u6a21\u62df\u51fd\u6570\nfunc callRemoteService() (int, error) {\n    \/\/ \u6a21\u62df\u8fdc\u7a0b\u670d\u52a1\u8c03\u7528\u5931\u8d25\n    if rand.Intn(10) &lt; 5 {\n        return 0, errors.New(\"failed\")\n    }\n\n    return rand.Int(), nil\n}\n\n\/\/ \u5e26\u8d85\u65f6\u7684 main \u51fd\u6570\nfunc main() {\n    \/\/ \u8bbe\u7f6e 10 \u79d2\u8d85\u65f6\n    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)\n    defer cancel()\n\n    \/\/ \u8c03\u7528\u5e26\u8d85\u65f6\u7684\u91cd\u8bd5\u51fd\u6570\n    response, err := retryFunc(ctx)\n    if err != nil {\n        log.Println(err)\n    } else {\n        log.Println(\"Response:\", response)\n    }\n}<\/pre>\n<p>\u4eca\u5929\u5173\u4e8e\u300aGOLANG \u51fd\u6570\u7684\u8d85\u65f6\u548c\u91cd\u8bd5\u7b56\u7565\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u91cd\u8bd5\u7b56\u7565,\u8d85\u65f6\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   **CSS\u5a92\u4f53\u67e5\u8be2\uff1a\u5982\u4f55\u5728\u7279\u5b9a\u8bbe\u5907\u4e0a\u53bb\u9664\u80cc\u666f\u56fe\u7247\u6548\u679c\uff1f**\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5982\u4f55\u5728 GOLANG \u4e2d\u4f7f\u7528\u533f\u540d\u51fd\u6570\u5c06\u5207\u7247\u8f6c\u6362\u4e3a\u6620\u5c04\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5bf9\u4e8e\u4e00\u4e2aGOLANG\u5f00\u53d1\u8005\u6765\u8bf4\uff0c&#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-205875","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205875","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=205875"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205875\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}