{"id":207912,"date":"2025-07-08T12:09:24","date_gmt":"2025-07-08T04:09:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207912\/"},"modified":"2025-07-08T12:09:24","modified_gmt":"2025-07-08T04:09:24","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-go-%e4%b8%ad%e4%bd%bf%e7%94%a8-pkg-errors-%e6%89%93%e5%8d%b0%e9%94%99%e8%af%af%e7%9a%84%e8%a1%8c%e5%8f%b7%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207912\/","title":{"rendered":"\u5982\u4f55\u5728 go \u4e2d\u4f7f\u7528 pkg\/errors \u6253\u5370\u9519\u8bef\u7684\u884c\u53f7\uff1f"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u5728 go \u4e2d\u4f7f\u7528 pkg\/errors \u6253\u5370\u9519\u8bef\u7684\u884c\u53f7\uff1f<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-26 18:18:36<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60Golang\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300a\u5982\u4f55\u5728 go \u4e2d\u4f7f\u7528 pkg\/errors \u6253\u5370\u9519\u8bef\u7684\u884c\u53f7\uff1f\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n

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

\u6211\u80fd\u591f\u4f7f\u7528 juju\/errors \u6253\u5370\u9519\u8bef\u7684\u884c\u53f7\uff0c\u4f46\u4e0d\u786e\u5b9a\u5982\u4f55\u4f7f\u7528 pkg\/errors \u6253\u5370\u9519\u8bef\u7684\u884c\u53f7\u3002<\/p>\n

package main\n\nimport (\n    jerrors \"github.com\/juju\/errors\"\n    perrors \"github.com\/pkg\/errors\"\n\n    \"io\/ioutil\"\n    \"log\"\n)\n\nfunc jerror() error {\n    \/\/throw an error....\n    _, err := ioutil.readdir(\"r\")\n    if err != nil {\n        return jerrors.trace(err)\n    }\n    return nil\n}\n\nfunc perror() error {\n    \/\/throw an error....\n    _, err := ioutil.readdir(\"r\")\n    if err != nil {\n        return perrors.cause(err)\n    }\n    return nil\n}\n\nfunc main() {\n    jerr := jerror()\n    if jerr != nil {\n        log.println(jerrors.errorstack(jerr))\n    }\n\n    log.println(\"-------------------------\")\n\n    perr := perror()\n    if perr != nil {\n        log.println(perrors.withstack(perr))\n    }\n}<\/pre>\n
\u6253\u5370\u8f93\u51fa\uff1a<\/strong><\/p>\n
2020\/08\/26 00:19:48 open r: no such file or directory\ngo-mock-json-api\/main.go:15: \n2020\/08\/26 00:19:48 -------------------------\n2020\/08\/26 00:19:48 open r: no such file or directory<\/pre>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u4f7f\u7528\u9ed8\u8ba4\u7684 string()<\/code> \u65b9\u6cd5\u65f6\uff0c\u6765\u81ea pkg\/errors<\/code> \u7684\u9519\u8bef\u5c06\u4e0d\u4f1a\u6253\u5370\u5806\u6808\uff0c\u6539\u4e3a\u4f7f\u7528 \"%+v\"<\/code> \u6253\u5370<\/strong>\u3002<\/p>\n
\u6587\u6863\u7684 \u90e8\u5206\u5bf9\u6b64\u8fdb\u884c\u4e86\u89e3\u91ca\uff1a<\/p>\n
\u4ece\u6b64\u5305\u8fd4\u56de\u7684\u6240\u6709\u9519\u8bef\u503c\u5747\u5b9e\u73b0 fmt.formatter\uff0c\u5e76\u4e14\u53ef\u4ee5\u7531 fmt \u5305\u8fdb\u884c\u683c\u5f0f\u5316\u3002\u652f\u6301\u4ee5\u4e0b\u52a8\u8bcd\uff1a<\/p>\n
%s    print the error. if the error has a cause it will be\n      printed recursively.\n%v    see %s\n%+v   extended format. each frame of the error's stacktrace will\n      be printed in detail.<\/pre>\n
 \u7684\u6587\u6863\u6709\u663e\u793a\u4e0d\u540c\u884c\u4e3a\u7684\u793a\u4f8b\uff1a<\/p>\n
cause := errors.new(\"whoops\")\nerr := errors.withstack(cause)\nfmt.println(err)\n\n\/\/ output:\n\/\/ whoops\n\nfmt.printf(\"%+v\", err)\n\n\/\/ output:\n\/\/ whoops\n\/\/ github.com\/pkg\/errors_test.examplewithstack_printf\n\/\/         \/home\/fabstu\/go\/src\/github.com\/pkg\/errors\/example_test.go:55\n\/\/ testing.runexample\n\/\/ ...\n<\/pre>\n
\u8bf7\u6ce8\u610f\uff0c\u5982\u679c\u60a8\u76f4\u63a5\u4f7f\u7528 errors.new<\/code>\uff0c\u5219\u4e0d\u9700\u8981\u4f7f\u7528 withstack<\/code>\uff0c \u5df2\u7ecf\u4e3a\u60a8\u5b8c\u6210\u4e86\u6b64\u64cd\u4f5c\uff0c\u5982 \u4e2d\u6240\u793a\uff1a<\/p>\n
package main\n\nimport (\n    \"fmt\"\n\n    \"github.com\/pkg\/errors\"\n)\n\nfunc main() {\n    err := errors.new(\"whoops\")\n    fmt.printf(\"string: %s\\n\", err)\n    fmt.printf(\"verbose: %+v\\n\", err)\n\n}\n<\/pre>\n
\u8f93\u51fa\uff1a<\/p>\n
String: whoops\nVerbose: whoops\nmain.main\n    \/tmp\/sandbox878560423\/prog.go:10\nruntime.main\n    \/usr\/local\/go-faketime\/src\/runtime\/proc.go:204\nruntime.goexit\n    \/usr\/local\/go-faketime\/src\/runtime\/asm_amd64.s:1374<\/pre>\n
\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u5728 go \u4e2d\u4f7f\u7528 pkg\/errors \u6253\u5370\u9519\u8bef\u7684\u884c\u53f7\uff1f\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-207912","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207912","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=207912"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207912\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}