{"id":205751,"date":"2025-06-12T09:54:57","date_gmt":"2025-06-12T01:54:57","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205751\/"},"modified":"2025-06-12T09:54:57","modified_gmt":"2025-06-12T01:54:57","slug":"%e5%9c%a8-go-%e5%b9%b6%e5%8f%91%e5%87%bd%e6%95%b0%e4%b8%ad%e5%a4%84%e7%90%86%e9%94%99%e8%af%af%e7%9a%84%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205751\/","title":{"rendered":"\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7
\n\u300a\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230
\n<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0
\nGOLANG<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01,\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\uff1a\u4f7f\u7528 error \u503c\u6307\u793a\u9519\u8bef\uff1b\u68c0\u67e5 error \u503c\u786e\u5b9a\u662f\u5426\u51fa\u9519\uff1b\u4f7f\u7528 defer \u6355\u83b7\u9519\u8bef\u5e76\u786e\u4fdd\u8d44\u6e90\u91ca\u653e\u3002,
\n,
\n\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5<\/strong>,\u5728 Go \u4e2d\u4f7f\u7528\u5e76\u53d1\u51fd\u6570\u65f6\uff0c\u6b63\u786e\u5904\u7406\u9519\u8bef\u81f3\u5173\u91cd\u8981\u3002\u8fd9\u7bc7\u6587\u7ae0\u5c06\u4ecb\u7ecd\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u5e76\u901a\u8fc7\u793a\u4f8b\u8fdb\u884c\u8bf4\u660e\u3002,
\n1. \u4f7f\u7528 error \u503c<\/strong>,Go \u4f7f\u7528 error \u503c\u6765\u8868\u793a\u9519\u8bef\u3002\u5e76\u53d1\u51fd\u6570\u5e94\u8be5\u8fd4\u56de error \u503c\u6765\u6307\u793a\u662f\u5426\u6709\u4efb\u4f55\u9519\u8bef\u53d1\u751f\u3002,
\n2. \u68c0\u67e5 error \u503c<\/strong>,\u8c03\u7528\u5e76\u53d1\u51fd\u6570\u540e\uff0c\u5e94\u8be5\u68c0\u67e5\u8fd4\u56de\u7684 error \u503c\u662f\u5426\u4e3a nil\u3002\u5982\u679c\u4e3a nil\uff0c\u8bf4\u660e\u6ca1\u6709\u53d1\u751f\u9519\u8bef\u3002\u5426\u5219\uff0c\u5e94\u8be5\u5904\u7406\u9519\u8bef\u3002,
\n3. \u4f7f\u7528 defer \u6355\u83b7\u9519\u8bef<\/strong>,\u4f7f\u7528 defer \u5173\u952e\u5b57\u53ef\u4ee5\u5728\u51fd\u6570\u8fd4\u56de\u4e4b\u524d\u6267\u884c\u6e05\u7406\u64cd\u4f5c\u3002\u8fd9\u5bf9\u4e8e\u786e\u4fdd\u5373\u4f7f\u53d1\u751f\u9519\u8bef\u4e5f\u80fd\u91ca\u653e\u8d44\u6e90\u5f88\u6709\u7528\u3002,
\n\u5b9e\u6218\u6848\u4f8b<\/strong>,\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u4e0b\u8f7d\u6587\u4ef6\u5e76\u5c06\u5176\u4fdd\u5b58\u5230\u78c1\u76d8\u7684\u5e76\u53d1\u51fd\u6570\u7684\u793a\u4f8b\uff1a,
\n\u6ce8\u610f\u4e8b\u9879<\/strong>,\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002,\u68c0\u67e5\u6240\u6709\u53ef\u80fd\u51fa\u9519\u7684\u5730\u65b9\u7684 error \u503c\u3002,\u59cb\u7ec8\u8fd4\u56de error \u503c\u3002,\u4f7f\u7528 defer \u6765\u91ca\u653e\u8d44\u6e90\u548c\u5904\u7406\u9519\u8bef\u3002,\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7
\n\u300a\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230
\n<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0
\nGOLANG<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5<\/span><\/p>\n

\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5<\/h1>\n

2024-10-27 08:27:00<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\u300a\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0GOLANG<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\uff1a\u4f7f\u7528 error \u503c\u6307\u793a\u9519\u8bef\uff1b\u68c0\u67e5 error \u503c\u786e\u5b9a\u662f\u5426\u51fa\u9519\uff1b\u4f7f\u7528 defer \u6355\u83b7\u9519\u8bef\u5e76\u786e\u4fdd\u8d44\u6e90\u91ca\u653e\u3002<\/p>\n

<\/p>\n

\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n

\u5728 Go \u4e2d\u4f7f\u7528\u5e76\u53d1\u51fd\u6570\u65f6\uff0c\u6b63\u786e\u5904\u7406\u9519\u8bef\u81f3\u5173\u91cd\u8981\u3002\u8fd9\u7bc7\u6587\u7ae0\u5c06\u4ecb\u7ecd\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u5e76\u901a\u8fc7\u793a\u4f8b\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n

1. \u4f7f\u7528 error \u503c<\/strong><\/p>\n

Go \u4f7f\u7528 error \u503c\u6765\u8868\u793a\u9519\u8bef\u3002\u5e76\u53d1\u51fd\u6570\u5e94\u8be5\u8fd4\u56de error \u503c\u6765\u6307\u793a\u662f\u5426\u6709\u4efb\u4f55\u9519\u8bef\u53d1\u751f\u3002<\/p>\n

2. \u68c0\u67e5 error \u503c<\/strong><\/p>\n

\u8c03\u7528\u5e76\u53d1\u51fd\u6570\u540e\uff0c\u5e94\u8be5\u68c0\u67e5\u8fd4\u56de\u7684 error \u503c\u662f\u5426\u4e3a nil\u3002\u5982\u679c\u4e3a nil\uff0c\u8bf4\u660e\u6ca1\u6709\u53d1\u751f\u9519\u8bef\u3002\u5426\u5219\uff0c\u5e94\u8be5\u5904\u7406\u9519\u8bef\u3002<\/p>\n

3. \u4f7f\u7528 defer \u6355\u83b7\u9519\u8bef<\/strong><\/p>\n

\u4f7f\u7528 defer \u5173\u952e\u5b57\u53ef\u4ee5\u5728\u51fd\u6570\u8fd4\u56de\u4e4b\u524d\u6267\u884c\u6e05\u7406\u64cd\u4f5c\u3002\u8fd9\u5bf9\u4e8e\u786e\u4fdd\u5373\u4f7f\u53d1\u751f\u9519\u8bef\u4e5f\u80fd\u91ca\u653e\u8d44\u6e90\u5f88\u6709\u7528\u3002<\/p>\n

\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n

\u8ba9\u6211\u4eec\u770b\u4e00\u4e2a\u4e0b\u8f7d\u6587\u4ef6\u5e76\u5c06\u5176\u4fdd\u5b58\u5230\u78c1\u76d8\u7684\u5e76\u53d1\u51fd\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n

func downloadFile(url string, filename string) error {\n    \/\/ \u521b\u5efa HTTP \u5ba2\u6237\u7aef\n    client := &http.Client{}\n\n    \/\/ \u53d1\u8d77 HTTP \u8bf7\u6c42\n    resp, err := client.Get(url)\n    if err != nil {\n        return err\n    }\n\n    \/\/ \u68c0\u67e5 HTTP \u72b6\u6001\u7801\n    if resp.StatusCode != http.StatusOK {\n        return fmt.Errorf(\"\u610f\u5916\u7684 HTTP \u72b6\u6001\u7801: %d\", resp.StatusCode)\n    }\n\n    \/\/ \u521b\u5efa\u6587\u4ef6\n    f, err := os.Create(filename)\n    if err != nil {\n        return err\n    }\n\n    \/\/ \u5c06\u54cd\u5e94\u5185\u5bb9\u5199\u5165\u6587\u4ef6\n    defer f.Close()  \/\/ \u786e\u4fdd\u6587\u4ef6\u5728\u51fd\u6570\u8fd4\u56de\u524d\u5173\u95ed\n    _, err = io.Copy(f, resp.Body)\n    if err != nil {\n        return err\n    }\n\n    return nil\n}<\/pre>\n
\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n
    \n
  • \u59cb\u7ec8\u8fd4\u56de error \u503c\u3002<\/li>\n
  • \u68c0\u67e5\u6240\u6709\u53ef\u80fd\u51fa\u9519\u7684\u5730\u65b9\u7684 error \u503c\u3002<\/li>\n
  • \u4f7f\u7528 defer \u6765\u91ca\u653e\u8d44\u6e90\u548c\u5904\u7406\u9519\u8bef\u3002<\/li>\n
  • \u4fdd\u6301\u9519\u8bef\u5904\u7406\u4ee3\u7801\u7b80\u6d01\u660e\u4e86\u3002<\/li>\n
  • \u8003\u8651\u4f7f\u7528\u9519\u8bef\u5904\u7406\u5e93\u6765\u7b80\u5316\u9519\u8bef\u5904\u7406\u3002<\/li>\n<\/ul>\n
    \u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5728 Go \u5e76\u53d1\u51fd\u6570\u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n
    \n
    \n <\/dt>\n
    \n   solidworks\u5efa\u6a21\u9700\u8981\u4ec0\u4e48\u7535\u8111\u914d\u7f6e\uff1f\n <\/dd>\n<\/dl>\n
    \n
    \n <\/dt>\n
    \n   \u53f0\u79ef\u7535\u9b4f\u54f2\u5bb6\uff1a\u5b8c\u5168\u4e0d\u8003\u8651\u6536\u8d2dIDM\u7684\u6676\u5706\u5382 \u5ba2\u6237\u3001\u4f9b\u5e94\u94fe\u90fd\u662f\u5408\u4f5c\u4f19\u4f34\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
    \u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9...<\/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-205751","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205751","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=205751"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205751\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205751"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}