{"id":207583,"date":"2025-07-08T13:24:59","date_gmt":"2025-07-08T05:24:59","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207583\/"},"modified":"2025-07-08T13:24:59","modified_gmt":"2025-07-08T05:24:59","slug":"error-wrapf%e3%80%81errors-errorf-%e5%92%8c-fmt-errorf-%e4%b9%8b%e9%97%b4%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207583\/","title":{"rendered":"error.Wrapf()\u3001errors.Errorf() \u548c fmt.Errorf() \u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"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>error.Wrapf()\u3001errors.Errorf() \u548c fmt.Errorf() \u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-23 19:21:37<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300aerror.Wrapf()\u3001errors.Errorf() \u548c fmt.Errorf() \u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>Go \u6807\u51c6\u5305\u4e2d\u7684\u8fd9\u4e09\u4e2a\u51fd\u6570\u6709\u4ec0\u4e48\u533a\u522b\uff1a<\/p>\n<ul>\n<li><code>errors.Wrapf()<\/code><\/li>\n<\/ul>\n<p> Wrapf \u8fd4\u56de\u4e00\u4e2a\u9519\u8bef\uff0c\u5e76\u5728\u8c03\u7528 Wrapf \u65f6\u4f7f\u7528\u5806\u6808\u8ddf\u8e2a\u548c\u683c\u5f0f\u8bf4\u660e\u7b26\u6765\u6ce8\u91ca err\u3002\u5982\u679c err \u4e3a\u96f6\uff0cWrapf \u8fd4\u56de\u96f6\u3002 <\/p>\n<ul>\n<li><code>errors.Errorf()<\/code>\uff0c\u901a\u8fc7 <code>%w<\/code> \u683c\u5f0f\u53d8\u91cf\u63d0\u4f9b\u9519\u8bef<\/li>\n<\/ul>\n<p> Errorf \u6839\u636e\u683c\u5f0f\u8bf4\u660e\u7b26\u8fdb\u884c\u683c\u5f0f\u5316\uff0c\u5e76\u5c06\u5b57\u7b26\u4e32\u4f5c\u4e3a\u6ee1\u8db3\u9519\u8bef\u7684\u503c\u8fd4\u56de\u3002 Errorf \u8fd8\u8bb0\u5f55\u8c03\u7528\u5b83\u65f6\u7684\u5806\u6808\u8ddf\u8e2a\u3002 <\/p>\n<ul>\n<li><code>fmt.Errorf()<\/code>\uff0c\u901a\u8fc7 <code>%w<\/code> \u683c\u5f0f\u53d8\u91cf\u63d0\u4f9b\u9519\u8bef<\/li>\n<\/ul>\n<p> Errorf \u6839\u636e\u683c\u5f0f\u8bf4\u660e\u7b26\u8fdb\u884c\u683c\u5f0f\u5316\uff0c\u5e76\u5c06\u5b57\u7b26\u4e32\u4f5c\u4e3a\u6ee1\u8db3\u9519\u8bef\u7684\u503c\u8fd4\u56de\u3002 <\/p>\n<p> \u5982\u679c\u683c\u5f0f\u8bf4\u660e\u7b26\u5305\u542b\u5e26\u6709\u9519\u8bef\u64cd\u4f5c\u6570\u7684 %w \u52a8\u8bcd\uff0c\u5219\u8fd4\u56de\u7684\u9519\u8bef\u5c06\u5b9e\u73b0\u8fd4\u56de\u64cd\u4f5c\u6570\u7684 Unwrap \u65b9\u6cd5\u3002\u5305\u542b\u591a\u4e2a %w \u52a8\u8bcd\u6216\u4e3a\u5176\u63d0\u4f9b\u672a\u5b9e\u73b0\u9519\u8bef\u63a5\u53e3\u7684\u64cd\u4f5c\u6570\u662f\u65e0\u6548\u7684\u3002\u5426\u5219\uff0c%w \u52a8\u8bcd\u662f %v \u7684\u540c\u4e49\u8bcd\u3002 <\/p>\n<p>\u4ec0\u4e48\u65f6\u5019\u5e94\u8be5\u4f7f\u7528\u5176\u4e2d\u4e00\u4e2a\u800c\u4e0d\u662f\u5176\u4ed6\uff1f<\/p>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>\u9996\u5148\uff0c\u66f4\u6b63\uff1a<\/p>\n<p><em>\u4e0d\u662f<\/em>\u6807\u51c6\u5e93\u7684\u4e00\u90e8\u5206\uff01\u6807\u51c6 \u5305\u7684 api \u8981\u5c0f\u5f97\u591a\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c<code>github.com\/pkg\/errors<\/code> \u975e\u5e38\u53d7\u6b22\u8fce\uff0c\u5e76\u4e14\u7531\u4e00\u4e9b\u8457\u540d\u7684 gophers \u7ef4\u62a4\u3002\u7136\u800c\uff0c\u5b83\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\uff08\u5c3d\u7ba1\u4e0d\u662f\u5b8c\u5168**\uff09\u88ab \u5e9f\u5f03\u4e86\u3002<\/p>\n<p>\u4e86\u89e3\u8fd9\u4e09\u4e2a\u51fd\u6570\u4e4b\u95f4\u7684\u533a\u522b\u9700\u8981\u4e00\u4e9b\u5386\u53f2\u8bfe\u3002 \uff08\u6211\u5728 \u4e2d\u66f4\u8be6\u7ec6\u5730\u4ecb\u7ecd\u4e86\u8fd9\u6bb5\u5386\u53f2\u3002\uff09<\/p>\n<p>\u5728 go 1.13 \u4e4b\u524d\uff0c\u6ca1\u6709\u5b98\u65b9\u8ba4\u53ef\u7684\u65b9\u6cd5\u6765\u201c\u5305\u88c5\u201d\u9519\u8bef\u3002 <code>github.com\/pkg\/errors<\/code> \u4f7f\u7528 <code>wrap<\/code> \u548c <code>wrapf<\/code> \u65b9\u6cd5\u586b\u8865\u4e86\u8fd9\u4e00\u7a7a\u767d\u3002\u8fd9\u5141\u8bb8\u4f7f\u7528\u9644\u52a0\u4e0a\u4e0b\u6587\uff08\u5305\u62ec\u5806\u6808\u8ddf\u8e2a\uff09\u5305\u88c5\u9519\u8bef\uff0c\u540c\u65f6\u4ee5\u539f\u59cb\u5f62\u5f0f\u4fdd\u7559\u539f\u59cb\u9519\u8bef\u3002<\/p>\n<p>go 1.13\u5f00\u53d1\u65f6\uff0c\u4f7f\u7528<code>github.com\/pkg\/errors<\/code>\u6765\u5f71\u54cd\u65b0\u7684api\uff0c\u4f46\u6700\u7ec8\u7248\u672c\u7565\u6709\u4e0d\u540c\u3002\u4ed6\u4eec\u51b3\u5b9a\u4f7f\u7528\u65b0\u7684 <code>%w<\/code> \u52a8\u8bcd\u6765\u6269\u5c55 <code>fmt.errorf<\/code> \u65b9\u6cd5\uff0c\u800c\u4e0d\u662f <code>wrap<\/code> \u548c <code>wrapf<\/code> \u65b9\u6cd5\uff0c\u8fd9\u5c06\u4e3a\u60a8\u6267\u884c\u9519\u8bef\u5305\u88c5\u3002<\/p>\n<p>\u8fd9\u610f\u5473\u7740\u4ee5\u4e0b\u4ee3\u7801\u5927\u81f4*\u7b49\u6548\uff1a<\/p>\n<pre>    import \"github.com\/pkg\/errors\"\n\n    \/* snip *\/\n\n    return errors.wrapf(err, \"bad things\")\n<\/pre>\n<pre>\/\/ +build go1.13\n\n    import \"fmt\"\n\n    \/* snip *\/\n    return fmt.errorf(\"bad things: %w\", err)<\/pre>\n<p>\u5f53 go 1.13 \u53d1\u5e03\u65f6\uff0c<code>%w<\/code> \u52a8\u8bcd\u88ab\u6dfb\u52a0\u5230 <code>fmt.errorf<\/code> \u4e2d\uff0c<code>github.com\/pkg\/errors<\/code> \u4e5f\u8ddf\u8fdb\u5e76\u6dfb\u52a0\u4e86\u76f8\u540c\u7684\u652f\u6301\uff0c\u6240\u4ee5\u73b0\u5728 <code>wrapf<\/code> \u5b9e\u9645\u4e0a\u5df2\u7ecf\u8fc7\u65f6\u4e86\u3002<\/p>\n<p>\u8fd9\u7ed9\u6211\u4eec\u5e26\u6765\u4e86\u5f53\u524d\u7684\u5efa\u8bae\uff1a<\/p>\n<ol>\n<li>\u5982\u679c\u60a8\u5e0c\u671b\u5728\u9519\u8bef\u4e2d\u5305\u542b\u5806\u6808\u8ddf\u8e2a\uff0c\u8bf7\u4f7f\u7528 <code>github.com\/pkg\/errors.errorf<\/code> \u6765\u5305\u88c5\u9519\u8bef\u3002<\/li>\n<li>\u5982\u679c\u60a8\u4e0d\u5173\u5fc3\u5806\u6808\u8ddf\u8e2a\uff0c\u8bf7\u4f7f\u7528\u6807\u51c6\u5e93\u4e2d\u7684 <code>fmt.errorf<\/code>\u3002<\/li>\n<li>\u6c38\u8fdc\u4e0d\u8981\u518d\u4f7f\u7528 <code>errors.wrapf<\/code> \u4e86\u3002\u8fd9\u662f\u4e3a\u4e86\u5411\u540e\u517c\u5bb9\u3002<\/li>\n<\/ol>\n<p>*<code>github.com\/pkg\/errors<\/code> \u8f6f\u4ef6\u5305\u4e0d\u518d\u4e3b\u52a8\u7ef4\u62a4\u3002\u8be5\u5b58\u50a8\u5e93\u5df2\u5b58\u6863\uff0c\u4e0d\u518d\u63a5\u53d7\u66f4\u65b0\uff0c\u4f46\u4ecd\u53ef\u4f9b\u4f7f\u7528\u3002<\/p>\n<p>**\u6807\u51c6\u5e93\u7684 <code>error<\/code> \u5305\u4ecd\u7136\u4e0d\u5305\u542b\u5806\u6808\u8ddf\u8e2a\uff0c\u56e0\u6b64 <code>github.com\/pkg\/errors<\/code> \u4ecd\u7136\u5f88\u53d7\u6b22\u8fce\u3002<\/p>\n<p>\u53ea\u662f\u4e00\u4e2a\u5c0f\u6d4b\u8bd5\u6765\u8bf4\u660e \uff0c\u8fd9\u91cc\u662f\u4e00\u4e2a\u975e\u5e38\u7b80\u77ed\u6d4b\u8bd5\uff1a<\/p>\n<pre>func errorsWrapF() {\n    wrap_err := errors.Wrapf(errors.New(\"a random error\"), \"wrapper\")\n    fmt.Printf(\"%+v\\n\", wrap_err)\n}\n\/* would print:\na random error\nmain.errorsWrapF\n        \/home\/tests\/gosandbox\/error\/main.go:18\nmain.main\n        \/home\/tests\/gosandbox\/error\/main.go:11\nruntime.main\n        \/usr\/local\/go\/src\/runtime\/proc.go:204\nruntime.goexit\n        \/usr\/local\/go\/src\/runtime\/asm_amd64.s:1374\nwrapper\nmain.errorsWrapF\n        \/home\/tests\/gosandbox\/error\/main.go:19\nmain.main\n        \/home\/tests\/gosandbox\/error\/main.go:11\nruntime.main\n        \/usr\/local\/go\/src\/runtime\/proc.go:204\nruntime.goexit\n        \/usr\/local\/go\/src\/runtime\/asm_amd64.s:1374\n*\/\n\n\nfunc errorsErrorF() {\n    err := errors.Errorf(\"a random error because of %w\", errors.New(\"a random error\"))\n    fmt.Printf(\"%+v\\n\", err)\n}\n\/* would print:\na random error because of a random error\nmain.errorsErrorF\n        \/home\/tests\/gosandbox\/error\/main.go:27\nmain.main\n        \/home\/tests\/gosandbox\/error\/main.go:10\nruntime.main\n        \/usr\/local\/go\/src\/runtime\/proc.go:204\nruntime.goexit\n        \/usr\/local\/go\/src\/runtime\/asm_amd64.s:1374\n*\/\n\n\n\nfunc fmtErrorF() {\n    err := fmt.Errorf(\"a random error because of %w\", errors.New(\"a random error\"))\n    fmt.Printf(\"%+v\\n\", err)\n}\n\/* would print:\na random error because of a random error\n*\/<\/pre>\n<p>\u4eca\u5929\u5173\u4e8e\u300aerror.Wrapf()\u3001errors.Errorf() \u548c fmt.Errorf() \u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f\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\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\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-207583","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207583","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=207583"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207583\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}