{"id":1416,"date":"2022-11-19T15:53:58","date_gmt":"2022-11-19T07:53:58","guid":{"rendered":"http:\/\/175.24.184.226\/?p=1416"},"modified":"2022-11-19T15:53:58","modified_gmt":"2022-11-19T07:53:58","slug":"go-%e9%94%99%e8%af%af%e5%92%8c%e5%bc%82%e5%b8%b8%e7%9a%84%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"\/?p=1416","title":{"rendered":"go: \u9519\u8bef\u548c\u5f02\u5e38\u7684\u6982\u5ff5"},"content":{"rendered":"

\u9519\u8bef\u548c\u5f02\u5e38\u7684\u6982\u5ff5<\/h2>\n

\u9519\u8bef\u548c\u5f02\u5e38\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u6982\u5ff5\uff0c\u975e\u5e38\u5bb9\u6613\u6df7\u6dc6\u3002\u5f88\u591a\u7a0b\u5e8f\u5458\u4e60\u60ef\u5c06\u4e00\u5207\u975e\u6b63\u5e38\u60c5\u51b5\u90fd\u770b\u505a\u9519\u8bef\uff0c\u800c\u4e0d\u533a\u5206\u9519\u8bef\u548c\u5f02\u5e38\uff0c\u5373\u4f7f\u7a0b\u5e8f\u4e2d\u53ef\u80fd\u6709\u5f02\u5e38\u629b\u51fa\uff0c\u4e5f\u5c06\u5f02\u5e38\u53ca\u65f6\u6355\u83b7\u5e76\u8f6c\u6362\u6210\u9519\u8bef\u3002\u4ece\u8868\u9762\u4e0a\u770b\uff0c\u4e00\u5207\u7686\u9519\u8bef\u7684\u601d\u8def\u66f4\u7b80\u5355\uff0c\u800c\u5f02\u5e38\u7684\u5f15\u5165\u4ec5\u4ec5\u589e\u52a0\u4e86\u989d\u5916\u7684\u590d\u6742\u5ea6\u3002<\/p>\n

\u4f46\u4e8b\u5b9e\u5e76\u975e\u5982\u6b64\u3002\u4f17\u6240\u5468\u77e5\uff0cGolang\u9075\u5faa\u201c\u5c11\u5373\u662f\u591a\u201d\u7684\u8bbe\u8ba1\u54f2\u5b66\uff0c\u8ffd\u6c42\u7b80\u6d01\u4f18\u96c5\uff0c\u5c31\u662f\u8bf4\u5982\u679c\u5f02\u5e38\u4ef7\u503c\u4e0d\u5927\uff0c\u5c31\u4e0d\u4f1a\u5c06\u5f02\u5e38\u52a0\u5165\u5230\u8bed\u8a00\u7279\u6027\u4e2d\u3002<\/p>\n

\u9519\u8bef\u548c\u5f02\u5e38\u5904\u7406\u662f\u7a0b\u5e8f\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff0c\u6211\u4eec\u5148\u770b\u770b\u4e0b\u9762\u51e0\u4e2a\u95ee\u9898\uff1a<\/p>\n

    \n
  1. \u9519\u8bef\u548c\u5f02\u5e38\u5982\u4f55\u533a\u5206\uff1f<\/li>\n
  2. \u9519\u8bef\u5904\u7406\u7684\u65b9\u5f0f\u6709\u54ea\u51e0\u79cd\uff1f<\/li>\n
  3. \u4ec0\u4e48\u65f6\u5019\u9700\u8981\u4f7f\u7528\u5f02\u5e38\u7ec8\u6b62\u7a0b\u5e8f\uff1f<\/li>\n
  4. \u4ec0\u4e48\u65f6\u5019\u9700\u8981\u6355\u83b7\u5f02\u5e38\uff1f<\/li>\n<\/ol>\n

    \u9519\u8bef\u6307\u7684\u662f\u53ef\u80fd\u51fa\u73b0\u95ee\u9898\u7684\u5730\u65b9\u51fa\u73b0\u4e86\u95ee\u9898\uff0c\u6bd4\u5982\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u65f6\u5931\u8d25\uff0c\u8fd9\u79cd\u60c5\u51b5\u5728\u4eba\u4eec\u7684\u610f\u6599\u4e4b\u4e2d \uff1b\u800c\u5f02\u5e38\u6307\u7684\u662f\u4e0d\u5e94\u8be5\u51fa\u73b0\u95ee\u9898\u7684\u5730\u65b9\u51fa\u73b0\u4e86\u95ee\u9898\uff0c\u6bd4\u5982\u5f15\u7528\u4e86\u7a7a\u6307\u9488\uff0c\u8fd9\u79cd\u60c5\u51b5\u5728\u4eba\u4eec\u7684\u610f\u6599\u4e4b\u5916\u3002\u53ef\u89c1\uff0c\u9519\u8bef\u662f\u4e1a\u52a1\u8fc7\u7a0b\u7684\u4e00\u90e8\u5206\uff0c\u800c\u5f02\u5e38\u4e0d\u662f<\/strong> \u3002<\/p>\n

    Golang\u4e2d\u5f15\u5165error<\/code>\u63a5\u53e3\u7c7b\u578b\u4f5c\u4e3a\u9519\u8bef\u5904\u7406\u7684\u6807\u51c6\u6a21\u5f0f\uff0c\u5982\u679c\u51fd\u6570\u8981\u8fd4\u56de\u9519\u8bef\uff0c\u5219\u8fd4\u56de\u503c\u7c7b\u578b\u5217\u8868\u4e2d\u80af\u5b9a\u5305\u542berror<\/code>\u3002error<\/code>\u5904\u7406\u8fc7\u7a0b\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u4e2d\u7684\u9519\u8bef\u7801\uff0c\u53ef\u9010\u5c42\u8fd4\u56de\uff0c\u76f4\u5230\u88ab\u5904\u7406\u3002<\/p>\n

    Golang\u4e2d\u5f15\u5165\u4e24\u4e2a\u5185\u7f6e\u51fd\u6570panic<\/code>\u548crecover<\/code>\u6765\u89e6\u53d1\u548c\u7ec8\u6b62\u5f02\u5e38\u5904\u7406\u6d41\u7a0b\uff0c\u540c\u65f6\u5f15\u5165\u5173\u952e\u5b57defer<\/code>\u6765\u5ef6\u8fdf\u6267\u884cdefer\u540e\u9762\u7684\u51fd\u6570\u3002<\/p>\n

    \u4e00\u76f4\u7b49\u5230\u5305\u542bdefer\u8bed\u53e5\u7684\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u65f6\uff0c\u5ef6\u8fdf\u51fd\u6570\uff08defer\u540e\u7684\u51fd\u6570\uff09\u624d\u4f1a\u88ab\u6267\u884c\uff0c\u800c\u4e0d\u7ba1\u5305\u542bdefer<\/code>\u8bed\u53e5\u7684\u51fd\u6570\u662f\u901a\u8fc7return<\/code>\u7684\u6b63\u5e38\u7ed3\u675f\uff0c\u8fd8\u662f\u7531\u4e8epanic\u5bfc\u81f4\u7684\u5f02\u5e38\u7ed3\u675f\u3002\u4f60\u53ef\u4ee5\u5728\u4e00\u4e2a\u51fd\u6570\u4e2d\u6267\u884c\u591a\u6761defer\u8bed\u53e5\uff0c\u5b83\u4eec\u7684\u6267\u884c\u987a\u5e8f\u4e0e\u58f0\u660e\u987a\u5e8f\u76f8\u53cd\u3002<\/p>\n

    \u5f53\u7a0b\u5e8f\u8fd0\u884c\u65f6\uff0c\u5982\u679c\u9047\u5230\u5f15\u7528\u7a7a\u6307\u9488\u3001\u4e0b\u6807\u8d8a\u754c\u6216\u663e\u5f0f\u8c03\u7528panic<\/code>\u51fd\u6570\u7b49\u60c5\u51b5\uff0c\u5219\u5148\u89e6\u53d1panic<\/code>\u51fd\u6570\u7684\u6267\u884c\uff0c\u7136\u540e\u8c03\u7528\u5ef6\u8fdf\u51fd\u6570\u3002\u8c03\u7528\u8005\u7ee7\u7eed\u4f20\u9012panic\uff0c\u56e0\u6b64\u8be5\u8fc7\u7a0b\u4e00\u76f4\u5728\u8c03\u7528\u6808\u4e2d\u91cd\u590d\u53d1\u751f\uff1a\u51fd\u6570\u505c\u6b62\u6267\u884c\uff0c\u8c03\u7528\u5ef6\u8fdf\u6267\u884c\u51fd\u6570\u7b49\u3002\u5982\u679c\u4e00\u8def\u5728\u5ef6\u8fdf\u51fd\u6570\u4e2d\u6ca1\u6709recover\u51fd\u6570\u7684\u8c03\u7528\uff0c\u5219\u4f1a\u5230\u8fbe\u8be5\u643a\u7a0b\u7684\u8d77\u70b9\uff0c\u8be5\u643a\u7a0b\u7ed3\u675f\uff0c\u7136\u540e\u7ec8\u6b62\u5176\u4ed6\u6240\u6709\u643a\u7a0b\uff0c\u5305\u62ec\u4e3b\u643a\u7a0b\uff08\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u4e2d\u7684\u4e3b\u7ebf\u7a0b\uff0c\u8be5\u643a\u7a0bID\u4e3a1\uff09\u3002<\/p>\n

    \u9519\u8bef\u548c\u5f02\u5e38\u4eceGolang\u673a\u5236\u4e0a\u8bb2\uff0c\u5c31\u662ferror\u548cpanic\u7684\u533a\u522b\u3002\u5f88\u591a\u5176\u4ed6\u8bed\u8a00\u4e5f\u4e00\u6837\uff0c\u6bd4\u5982C++\/Java\uff0c\u6ca1\u6709error\u4f46\u6709errno\uff0c\u6ca1\u6709panic\u4f46\u6709throw\u3002<\/p>\n

    Golang\u9519\u8bef\u548c\u5f02\u5e38\u662f\u53ef\u4ee5\u4e92\u76f8\u8f6c\u6362\u7684\uff1a<\/p>\n

      \n
    1. \u9519\u8bef\u8f6c\u5f02\u5e38\uff0c\u6bd4\u5982\u7a0b\u5e8f\u903b\u8f91\u4e0a\u5c1d\u8bd5\u8bf7\u6c42\u67d0\u4e2aURL\uff0c\u6700\u591a\u5c1d\u8bd5\u4e09\u6b21\uff0c\u5c1d\u8bd5\u4e09\u6b21\u7684\u8fc7\u7a0b\u4e2d\u8bf7\u6c42\u5931\u8d25\u662f\u9519\u8bef\uff0c\u5c1d\u8bd5\u5b8c\u7b2c\u4e09\u6b21\u8fd8\u4e0d\u6210\u529f\u7684\u8bdd\uff0c\u5931\u8d25\u5c31\u88ab\u63d0\u5347\u4e3a\u5f02\u5e38\u4e86\u3002<\/li>\n
    2. \u5f02\u5e38\u8f6c\u9519\u8bef\uff0c\u6bd4\u5982panic\u89e6\u53d1\u7684\u5f02\u5e38\u88abrecover\u6062\u590d\u540e\uff0c\u5c06\u8fd4\u56de\u503c\u4e2derror\u7c7b\u578b\u7684\u53d8\u91cf\u8fdb\u884c\u8d4b\u503c\uff0c\u4ee5\u4fbf\u4e0a\u5c42\u51fd\u6570\u7ee7\u7eed\u8d70\u9519\u8bef\u5904\u7406\u6d41\u7a0b\u3002<\/li>\n<\/ol>\n

      \u4ec0\u4e48\u60c5\u51b5\u4e0b\u7528\u9519\u8bef\u8868\u8fbe\uff0c\u4ec0\u4e48\u60c5\u51b5\u4e0b\u7528\u5f02\u5e38\u8868\u8fbe\uff0c\u5c31\u5f97\u6709\u4e00\u5957\u89c4\u5219\uff0c\u5426\u5219\u5f88\u5bb9\u6613\u51fa\u73b0\u4e00\u5207\u7686\u9519\u8bef\u6216\u4e00\u5207\u7686\u5f02\u5e38\u7684\u60c5\u51b5\u3002<\/strong><\/p>\n

      \u5728\u8fd9\u4e2a\u542f\u793a\u4e0b\uff0c\u6211\u4eec\u7ed9\u51fa\u5f02\u5e38\u5904\u7406\u7684\u4f5c\u7528\u57df\uff08\u573a\u666f\uff09\uff1a<\/p>\n

        \n
      1. \u7a7a\u6307\u9488\u5f15\u7528<\/li>\n
      2. \u4e0b\u6807\u8d8a\u754c<\/li>\n
      3. \u9664\u6570\u4e3a0<\/li>\n
      4. \u4e0d\u5e94\u8be5\u51fa\u73b0\u7684\u5206\u652f\uff0c\u6bd4\u5982default<\/li>\n
      5. \u8f93\u5165\u4e0d\u5e94\u8be5\u5f15\u8d77\u51fd\u6570\u9519\u8bef<\/li>\n<\/ol>\n

        \u5176\u4ed6\u573a\u666f\u6211\u4eec\u4f7f\u7528\u9519\u8bef\u5904\u7406\uff0c\u8fd9\u4f7f\u5f97\u6211\u4eec\u7684\u51fd\u6570\u63a5\u53e3\u5f88\u7cbe\u70bc\u3002\u5bf9\u4e8e\u5f02\u5e38\uff0c\u6211\u4eec\u53ef\u4ee5\u9009\u62e9\u5728\u4e00\u4e2a\u5408\u9002\u7684\u4e0a\u6e38\u53bbrecover\uff0c\u5e76\u6253\u5370\u5806\u6808\u4fe1\u606f\uff0c\u4f7f\u5f97\u90e8\u7f72\u540e\u7684\u7a0b\u5e8f\u4e0d\u4f1a\u7ec8\u6b62\u3002<\/p>\n

        \u8bf4\u660e\uff1a Golang\u9519\u8bef\u5904\u7406\u65b9\u5f0f\u4e00\u76f4\u662f\u5f88\u591a\u4eba\u8bdf\u75c5\u7684\u5730\u65b9\uff0c\u6709\u4e9b\u4eba\u5410\u69fd\u8bf4\u4e00\u534a\u7684\u4ee3\u7801\u90fd\u662f"if err != nil { \u6253\u5370 && \u9519\u8bef\u5904\u7406 }<\/code>"\uff0c\u4e25\u91cd\u5f71\u54cd\u6b63\u5e38\u7684\u5904\u7406\u903b\u8f91\u3002\u5f53\u6211\u4eec\u533a\u5206\u9519\u8bef\u548c\u5f02\u5e38\uff0c\u6839\u636e\u89c4\u5219\u8bbe\u8ba1\u51fd\u6570\uff0c\u5c31\u4f1a\u5927\u5927\u63d0\u9ad8\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/strong><\/p>\n

        \u9519\u8bef\u5904\u7406\u7684\u6b63\u786e\u59ff\u52bf<\/h2>\n

        1. \u5931\u8d25\u7684\u539f\u56e0\u53ea\u6709\u4e00\u4e2a\u65f6\uff0c\u4e0d\u4f7f\u7528error<\/h3>\n
        func (self *AgentContext) CheckHostType(host_type string) error {\n    switch host_type {\n    case "virtual_machine":\n        return nil\n    case "bare_metal":\n        return nil\n    }\n    return errors.New("CheckHostType ERROR:" + host_type)\n}<\/code><\/pre>\n
        \u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u8be5\u51fd\u6570\u5931\u8d25\u7684\u539f\u56e0\u53ea\u6709\u4e00\u4e2a\uff0c\u6240\u4ee5\u8fd4\u56de\u503c\u7684\u7c7b\u578b\u5e94\u8be5\u4e3abool\uff0c\u800c\u4e0d\u662ferror\uff0c\u91cd\u6784\u4e00\u4e0b\u4ee3\u7801\uff1a<\/p>\n
        func (self *AgentContext) IsValidHostType(hostType string) bool {\n    return hostType == "virtual_machine" || hostType == "bare_metal"\n}<\/code><\/pre>\n
        \u8bf4\u660e\uff1a\u5927\u591a\u6570\u60c5\u51b5\uff0c\u5bfc\u81f4\u5931\u8d25\u7684\u539f\u56e0\u4e0d\u6b62\u4e00\u79cd\uff0c\u5c24\u5176\u662f\u5bf9I\/O\u64cd\u4f5c\u800c\u8a00\uff0c\u7528\u6237\u9700\u8981\u4e86\u89e3\u66f4\u591a\u7684\u9519\u8bef\u4fe1\u606f\uff0c\u8fd9\u65f6\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u4e0d\u518d\u662f\u7b80\u5355\u7684bool\uff0c\u800c\u662ferror\u3002<\/p>\n
        2. \u6ca1\u6709\u5931\u8d25\u65f6\uff0c\u4e0d\u4f7f\u7528error<\/h3>\n
        3. error\u5e94\u653e\u5728\u8fd4\u56de\u503c\u7c7b\u578b\u5217\u8868\u7684\u6700\u540e<\/h3>\n
        4. \u9519\u8bef\u503c\u7edf\u4e00\u5b9a\u4e49\uff0c\u800c\u4e0d\u662f\u8ddf\u7740\u611f\u89c9\u8d70<\/h3>\n
        \u5f88\u591a\u4eba\u5199\u4ee3\u7801\u65f6\uff0c\u5230\u5904return errors.New(value)<\/code>\uff0c\u800c\u9519\u8befvalue\u5728\u8868\u8fbe\u540c\u4e00\u4e2a\u542b\u4e49\u65f6\u4e5f\u53ef\u80fd\u5f62\u5f0f\u4e0d\u540c\uff0c\u6bd4\u5982\u201c\u8bb0\u5f55\u4e0d\u5b58\u5728\u201d\u7684\u9519\u8befvalue\u53ef\u80fd\u4e3a\uff1a<\/p>\n
          \n
        1. "record is not existed."<\/li>\n
        2. "record is not exist!"<\/li>\n
        3. "###record is not existed\uff01\uff01\uff01"<\/li>\n
        4. ...<\/li>\n<\/ol>\n
          \u8fd9\u4f7f\u5f97\u76f8\u540c\u7684\u9519\u8befvalue\u6492\u5728\u4e00\u5927\u7247\u4ee3\u7801\u91cc\uff0c\u5f53\u4e0a\u5c42\u51fd\u6570\u8981\u5bf9\u7279\u5b9a\u9519\u8befvalue\u8fdb\u884c\u7edf\u4e00\u5904\u7406\u65f6\uff0c\u9700\u8981\u6f2b\u6e38\u6240\u6709\u4e0b\u5c42\u4ee3\u7801\uff0c\u4ee5\u4fdd\u8bc1\u9519\u8befvalue\u7edf\u4e00\uff0c\u4e0d\u5e78\u7684\u662f\u6709\u65f6\u4f1a\u6709\u6f0f\u7f51\u4e4b\u9c7c\uff0c\u800c\u4e14\u8fd9\u79cd\u65b9\u5f0f\u4e25\u91cd\u963b\u788d\u4e86\u9519\u8befvalue\u7684\u91cd\u6784\u3002<\/p>\n
          \u4e8e\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u53c2\u8003C\/C++\u7684\u9519\u8bef\u7801\u5b9a\u4e49\u6587\u4ef6\uff0c\u5728Golang\u7684\u6bcf\u4e2a\u5305\u4e2d\u589e\u52a0\u4e00\u4e2a\u9519\u8bef\u5bf9\u8c61\u5b9a\u4e49\u6587\u4ef6\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
          5. \u9519\u8bef\u9010\u5c42\u4f20\u9012\u65f6\uff0c\u5c42\u5c42\u90fd\u52a0\u65e5\u5fd7<\/h3>\n
          \u6839\u636e\u7b14\u8005\u7ecf\u9a8c\uff0c\u5c42\u5c42\u90fd\u52a0\u65e5\u5fd7\u975e\u5e38\u65b9\u4fbf\u6545\u969c\u5b9a\u4f4d\u3002<\/p>\n
          \u8bf4\u660e\uff1a\u81f3\u4e8e\u901a\u8fc7\u6d4b\u8bd5\u6765\u53d1\u73b0\u6545\u969c\uff0c\u800c\u4e0d\u662f\u65e5\u5fd7\uff0c\u76ee\u524d\u5f88\u591a\u56e2\u961f\u8fd8\u5f88\u96be\u505a\u5230\u3002\u5982\u679c\u4f60\u6216\u4f60\u7684\u56e2\u961f\u80fd\u505a\u5230\uff0c\u90a3\u4e48\u8bf7\u5ffd\u7565\u8fd9\u4e2a\u59ff\u52bf:)<\/p>\n
          6. \u9519\u8bef\u5904\u7406\u4f7f\u7528defer<\/h3>\n
          \u6211\u4eec\u4e00\u822c\u901a\u8fc7\u5224\u65aderror\u7684\u503c\u6765\u5904\u7406\u9519\u8bef\uff0c\u5982\u679c\u5f53\u524d\u64cd\u4f5c\u5931\u8d25\uff0c\u9700\u8981\u5c06\u672c\u51fd\u6570\u4e2d\u5df2\u7ecfcreate\u7684\u8d44\u6e90destroy\u6389\uff0c\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
          \u5f53Golang\u7684\u4ee3\u7801\u6267\u884c\u65f6\uff0c\u5982\u679c\u9047\u5230defer\u7684\u95ed\u5305\u8c03\u7528\uff0c\u5219\u538b\u5165\u5806\u6808\u3002\u5f53\u51fd\u6570\u8fd4\u56de\u65f6\uff0c\u4f1a\u6309\u7167\u540e\u8fdb\u5148\u51fa\u7684\u987a\u5e8f\u8c03\u7528\u95ed\u5305\u3002<\/p>\n
          \u5bf9\u4e8e\u95ed\u5305\u7684\u53c2\u6570\u662f\u503c\u4f20\u9012\uff0c\u800c\u5bf9\u4e8e\u5916\u90e8\u53d8\u91cf\u5374\u662f\u5f15\u7528\u4f20\u9012\uff0c\u6240\u4ee5\u95ed\u5305\u4e2d\u7684\u5916\u90e8\u53d8\u91cferr\u7684\u503c\u5c31\u53d8\u6210\u5916\u90e8\u51fd\u6570\u8fd4\u56de\u65f6\u6700\u65b0\u7684err\u503c\u3002<\/strong><\/p>\n
          \u6839\u636e\u8fd9\u4e2a\u7ed3\u8bba\uff0c\u6211\u4eec\u91cd\u6784\u4e0a\u9762\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
          7. \u5f53\u53d1\u751f\u9519\u8bef\u65f6\uff0c\u4e0d\u5ffd\u7565\u6709\u7528\u7684\u8fd4\u56de\u503c<\/h3>\n
          \u901a\u5e38\uff0c\u5f53\u51fd\u6570\u8fd4\u56denon-nil\u7684error\u65f6\uff0c\u5176\u4ed6\u7684\u8fd4\u56de\u503c\u662f\u672a\u5b9a\u4e49\u7684(undefined)\uff0c\u8fd9\u4e9b\u672a\u5b9a\u4e49\u7684\u8fd4\u56de\u503c\u5e94\u8be5\u88ab\u5ffd\u7565\u3002\u7136\u800c\uff0c\u6709\u5c11\u90e8\u5206\u51fd\u6570\u5728\u53d1\u751f\u9519\u8bef\u65f6\uff0c\u4ecd\u7136\u4f1a\u8fd4\u56de\u4e00\u4e9b\u6709\u7528\u7684\u8fd4\u56de\u503c\u3002\u6bd4\u5982\uff0c\u5f53\u8bfb\u53d6\u6587\u4ef6\u53d1\u751f\u9519\u8bef\u65f6\uff0cRead\u51fd\u6570\u4f1a\u8fd4\u56de\u53ef\u4ee5\u8bfb\u53d6\u7684\u5b57\u8282\u6570\u4ee5\u53ca\u9519\u8bef\u4fe1\u606f\u3002\u5bf9\u4e8e\u8fd9\u79cd\u60c5\u51b5\uff0c\u5e94\u8be5\u5c06\u8bfb\u53d6\u5230\u7684\u5b57\u7b26\u4e32\u548c\u9519\u8bef\u4fe1\u606f\u4e00\u8d77\u6253\u5370\u51fa\u6765\u3002<\/p>\n
          \u5bf9\u5f85\u5f02\u5e38\u7684\u6001\u5ea6<\/h2>\n
          1. \u5728\u7a0b\u5e8f\u5f00\u53d1\u9636\u6bb5\uff0c\u575a\u6301\u901f\u9519<\/h3>\n
          \u53bb\u5e74\u5b66\u4e60Erlang\u7684\u65f6\u5019\uff0c\u5efa\u7acb\u4e86\u901f\u9519\u7684\u7406\u5ff5\uff0c\u7b80\u5355\u6765\u8bb2\u5c31\u662f\u201c\u8ba9\u5b83\u6302\u201d\uff0c\u53ea\u6709\u6302\u4e86\u4f60\u624d\u4f1a\u7b2c\u4e00\u65f6\u95f4\u77e5\u9053\u9519\u8bef\u3002\u5728\u65e9\u671f\u5f00\u53d1\u4ee5\u53ca\u4efb\u4f55\u53d1\u5e03\u9636\u6bb5\u4e4b\u524d\uff0c\u6700\u7b80\u5355\u7684\u540c\u65f6\u4e5f\u53ef\u80fd\u662f\u6700\u597d\u7684\u65b9\u6cd5\u662f\u8c03\u7528panic\u51fd\u6570\u6765\u4e2d\u65ad\u7a0b\u5e8f\u7684\u6267\u884c\u4ee5\u5f3a\u5236\u53d1\u751f\u9519\u8bef\uff0c\u4f7f\u5f97\u8be5\u9519\u8bef\u4e0d\u4f1a\u88ab\u5ffd\u7565\uff0c\u56e0\u800c\u80fd\u591f\u88ab\u5c3d\u5feb\u4fee\u590d\u3002<\/p>\n
          2. \u5728\u7a0b\u5e8f\u90e8\u7f72\u540e\uff0c\u5e94\u6062\u590d\u5f02\u5e38\u907f\u514d\u7a0b\u5e8f\u7ec8\u6b62<\/h3>\n
          \u6211\u4eec\u5728\u8c03\u7528recover<\/code>\u7684\u5ef6\u8fdf\u51fd\u6570\u4e2d\u4ee5\u6700\u5408\u7406\u7684\u65b9\u5f0f\u54cd\u5e94\u8be5\u5f02\u5e38\uff1a<\/p>\n
            \n
          1. \u6253\u5370\u5806\u6808\u7684\u5f02\u5e38\u8c03\u7528\u4fe1\u606f\u548c\u5173\u952e\u7684\u4e1a\u52a1\u4fe1\u606f\uff0c\u4ee5\u4fbf\u8fd9\u4e9b\u95ee\u9898\u4fdd\u7559\u53ef\u89c1\uff1b<\/li>\n
          2. \u5c06\u5f02\u5e38\u8f6c\u6362\u4e3a\u9519\u8bef\uff0c\u4ee5\u4fbf\u8c03\u7528\u8005\u8ba9\u7a0b\u5e8f\u6062\u590d\u5230\u5065\u5eb7\u72b6\u6001\u5e76\u7ee7\u7eed\u5b89\u5168\u8fd0\u884c\u3002<\/li>\n<\/ol>\n
            \u6211\u4eec\u770b\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n
            \u6211\u4eec\u671f\u671btest\u51fd\u6570\u7684\u8f93\u51fa\u662f\uff1a<\/p>\n
            \u5b9e\u9645\u4e0atest\u51fd\u6570\u7684\u8f93\u51fa\u662f\uff1a<\/p>\n
            \u539f\u56e0\u662fpanic\u5f02\u5e38\u5904\u7406\u673a\u5236\u4e0d\u4f1a\u81ea\u52a8\u5c06\u9519\u8bef\u4fe1\u606f\u4f20\u9012\u7ed9error\uff0c\u6240\u4ee5\u8981\u5728funcA\u51fd\u6570\u4e2d\u8fdb\u884c\u663e\u5f0f\u7684\u4f20\u9012\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
            3. \u5bf9\u4e8e\u4e0d\u5e94\u8be5\u51fa\u73b0\u7684\u5206\u652f\uff0c\u4f7f\u7528\u5f02\u5e38\u5904\u7406<\/h3>\n
            \u5f53\u67d0\u4e9b\u4e0d\u5e94\u8be5\u53d1\u751f\u7684\u573a\u666f\u53d1\u751f\u65f6\uff0c\u6211\u4eec\u5c31\u5e94\u8be5\u8c03\u7528panic\u51fd\u6570\u6765\u89e6\u53d1\u5f02\u5e38\u3002\u6bd4\u5982\uff0c\u5f53\u7a0b\u5e8f\u5230\u8fbe\u4e86\u67d0\u6761\u903b\u8f91\u4e0a\u4e0d\u53ef\u80fd\u5230\u8fbe\u7684\u8def\u5f84\uff1a<\/p>\n
            4. \u9488\u5bf9\u5165\u53c2\u4e0d\u5e94\u8be5\u6709\u95ee\u9898\u7684\u51fd\u6570\uff0c\u4f7f\u7528panic\u8bbe\u8ba1<\/h3>\n
            \u5165\u53c2\u4e0d\u5e94\u8be5\u6709\u95ee\u9898\u4e00\u822c\u6307\u7684\u662f\u786c\u7f16\u7801\uff0c\u6211\u4eec\u5148\u770b\u201c\u4e00\u4e2a\u542f\u793a\u201d\u4e00\u8282\u4e2d\u63d0\u5230\u7684\u4e24\u4e2a\u51fd\u6570\uff08Compile\u548cMustCompile\uff09\uff0c\u5176\u4e2dMustCompile\u51fd\u6570\u662f\u5bf9Compile\u51fd\u6570\u7684\u5305\u88c5\uff1a<\/p>\n
            \u6240\u4ee5\uff0c\u5bf9\u4e8e\u540c\u65f6\u652f\u6301\u7528\u6237\u8f93\u5165\u573a\u666f\u548c\u786c\u7f16\u7801\u573a\u666f\u7684\u60c5\u51b5\uff0c\u4e00\u822c\u652f\u6301\u786c\u7f16\u7801\u573a\u666f\u7684\u51fd\u6570\u662f\u5bf9\u652f\u6301\u7528\u6237\u8f93\u5165\u573a\u666f\u51fd\u6570\u7684\u5305\u88c5\u3002<\/p>\n
            \u5bf9\u4e8e\u53ea\u652f\u6301\u786c\u7f16\u7801\u5355\u4e00\u573a\u666f\u7684\u60c5\u51b5\uff0c\u51fd\u6570\u8bbe\u8ba1\u65f6\u76f4\u63a5\u4f7f\u7528panic\uff0c\u5373\u8fd4\u56de\u503c\u7c7b\u578b\u5217\u8868\u4e2d\u4e0d\u4f1a\u6709error\uff0c\u8fd9\u4f7f\u5f97\u51fd\u6570\u7684\u8c03\u7528\u5904\u7406\u975e\u5e38\u65b9\u4fbf\uff08\u6ca1\u6709\u4e86\u4e4f\u5473\u7684if err != nil {\/ \u6253\u5370 && \u9519\u8bef\u5904\u7406 \/}<\/code>\u4ee3\u7801\u5757\uff09\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u9519\u8bef\u548c\u5f02\u5e38\u7684\u6982\u5ff5 \u9519\u8bef\u548c\u5f02\u5e38\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u6982\u5ff5\uff0c\u975e\u5e38\u5bb9\u6613\u6df7\u6dc6\u3002\u5f88\u591a\u7a0b\u5e8f\u5458\u4e60\u60ef\u5c06\u4e00\u5207\u975e\u6b63\u5e38\u60c5\u51b5\u90fd\u770b\u505a\u9519\u8bef\uff0c\u800c\u4e0d\u533a\u5206\u9519\u8bef\u548c\u5f02\u5e38\uff0c\u5373\u4f7f\u7a0b\u5e8f\u4e2d\u53ef\u80fd   \u2026 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[117],"tags":[113],"_links":{"self":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1416"}],"collection":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1416"}],"version-history":[{"count":1,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1416\/revisions"}],"predecessor-version":[{"id":1417,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/1416\/revisions\/1417"}],"wp:attachment":[{"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1416"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1416"},{"taxonomy":"post_tag","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1416"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}