{"id":10006079,"date":"2022-08-01T18:18:26","date_gmt":"2022-08-01T10:18:26","guid":{"rendered":"https:\/\/ityet.com\/?p=10006079"},"modified":"2022-08-01T18:18:26","modified_gmt":"2022-08-01T10:18:26","slug":"if-err-nil-%e5%a4%aa%e7%83%a6%ef%bc%9fgo-%e5%88%9b%e5%a7%8b%e4%ba%ba%e6%95%99%e4%bd%a0%e5%a6%82%e4%bd%95%e5%af%b9%e9%94%99%e8%af%af%e8%bf%9b%e8%a1%8c%e7%bc%96%e7%a8%8b%ef%bc%81","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006079","title":{"rendered":"if err != nil \u592a\u70e6\uff1fGo \u521b\u59cb\u4eba\u6559\u4f60\u5982\u4f55\u5bf9\u9519\u8bef\u8fdb\u884c\u7f16\u7a0b\uff01"},"content":{"rendered":"

\u5927\u5bb6\u597d\uff0c\u6211\u662f\u714e\u9c7c\u3002<\/p>\n

\u524d\u6bb5\u65f6\u95f4\u6211\u5206\u4eab\u4e86\u4e00\u7bc7\u6587\u7ae0\u300a10+ \u6761 Go \u5b98\u65b9\u8c1a\u8bed\uff0c\u4f60\u77e5\u9053\u51e0\u6761\uff1f<\/a>\u300b\uff0c\u5f15\u53d1\u4e86\u8bb8\u591a\u5c0f\u4f19\u4f34\u7684\u8ba8\u8bba\u3002\u5176\u4e2d\u6709\u4e00\u6761 \u201cErrors are values\u201d\uff0c\u5927\u5bb6\u5728\u662f \u201c\u9519\u8bef\u662f\u503c\u201d \u8fd8\u662f \u201c\u9519\u8bef\u5c31\u662f\u4ef7\u503c\u201d \u4e2d\u53cd\u590d\u6a2a\u8df3\uff0c\u7ea0\u7ed3\u4e0d\u6613\u3002<\/p>\n

\u5176\u5b9e\u8bf4\u8fd9\u53e5\u8bdd\u7684 Rob Pike\uff0c\u4ed6\u7528\u4e00\u7bc7\u6587\u7ae0\u300aErrors are values<\/a>\u300b\u8be0\u91ca\u4e86\u8fd9\u53e5\u8c1a\u8bed\u7684\u610f\u601d\uff0c\u5230\u5e95\u662f\u4ec0\u4e48\uff1f<\/p>\n

\u4eca\u5929\u714e\u9c7c\u548c\u5927\u5bb6\u4e00\u8d77\u5b66\u4e60\uff0c\u4ee5\u4e0b\u7684 \u201c\u6211\u201d \u5747\u4ee3\u8868 Rob Pike\u3002<\/p>\n

\u80cc\u666f<\/h2>\n

Go \u7a0b\u5e8f\u5458\uff0c\u5c24\u5176\u662f\u90a3\u4e9b\u521a\u63a5\u89e6\u8be5\u8bed\u8a00\u7684\u7a0b\u5e8f\u5458\uff0c\u7ecf\u5e38\u8ba8\u8bba\u7684\u4e00\u4e2a\u95ee\u9898\u662f\u5982\u4f55\u5904\u7406\u9519\u8bef\u3002\u5bf9\u4e8e\u4ee5\u4e0b\u4ee3\u7801\u7247\u6bb5\u51fa\u73b0\u7684\u6b21\u6570\uff0c\u8c08\u8bdd\u7ecf\u5e38\u53d8\u6210\u54c0\u53f9\uff08\u5404\u5927\u5e73\u53f0\u5410\u69fd\u3001\u6279\u5224\u975e\u5e38\u591a\uff0c\u8ba4\u4e3a\u8bbe\u8ba1\u7684\u4e0d\u597d\uff09\u3002<\/p>\n

\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n

if err != nil {\n    return err\n}<\/code><\/pre>\n
\u626b\u63cf\u4ee3\u7801\u7247\u6bb5<\/h3>\n
\u6211\u4eec\u6700\u8fd1\u626b\u63cf\u4e86\u6211\u4eec\u80fd\u627e\u5230\u7684\u6240\u6709 Go \u5f00\u6e90\u9879\u76ee\uff0c\u53d1\u73b0\u8fd9\u4e2a\u4ee3\u7801\u7247\u6bb5\u53ea\u5728\u6bcf\u4e00\u4e24\u9875\u51fa\u73b0\u4e00\u6b21\uff0c\u6bd4\u4e00\u4e9b\u4eba\u8ba4\u4e3a\u7684\u8981\u5c11\u3002<\/p>\n
\u5c3d\u7ba1\u5982\u6b64\uff0c\u5982\u679c\u4eba\u4eec\u4ecd\u7136\u8ba4\u4e3a\u5fc5\u987b\u7ecf\u5e38\u8f93\u5165\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n
if err != nil<\/code><\/pre>\n
\u90a3\u4e48\u4e00\u5b9a\u6709\u4ec0\u4e48\u5730\u65b9\u51fa\u4e86\u95ee\u9898\uff0c\u800c\u660e\u663e\u7684\u76ee\u6807\u5c31\u662f Go \u8bed\u8a00\u672c\u8eab\uff08\u8bf4\u8bbe\u8ba1\u7684\u4e0d\u597d\uff1f\uff09\u3002<\/p>\n
\u9519\u8bef\u7684\u7406\u89e3<\/h3>\n
\u663e\u7136\u8fd9\u662f\u4e0d\u5e78\u7684\uff0c\u8bef\u5bfc\u7684\uff0c\u800c\u4e14\u5f88\u5bb9\u6613\u7ea0\u6b63\u3002\u4e5f\u8bb8\u73b0\u5728\u7684\u60c5\u51b5\u662f\uff0c\u521a\u63a5\u89e6 Go \u7684\u7a0b\u5e8f\u5458\u4f1a\u95ee\uff1a”\u5982\u4f55\u5904\u7406\u9519\u8bef\uff1f”\uff0c\u5b66\u4e60\u8fd9\u79cd\u6a21\u5f0f\uff0c\u7136\u540e\u5c31\u6b64\u6253\u4f4f\u3002<\/p>\n
\u5728\u5176\u4ed6\u8bed\u8a00\u4e2d\uff0c\u4eba\u4eec\u53ef\u80fd\u4f1a\u4f7f\u7528 try-catch \u5757\u6216\u5176\u4ed6\u7c7b\u4f3c\u673a\u5236\u6765\u5904\u7406\u9519\u8bef\u3002\u56e0\u6b64\uff0c\u7a0b\u5e8f\u5458\u8ba4\u4e3a\uff0c\u5f53\u6211\u5728\u4ee5\u524d\u7684\u8bed\u8a00\u4e2d\u4f1a\u4f7f\u7528 try-catch \u65f6\uff0c\u6211\u5728 Go \u4e2d\u53ea\u9700\u8f93\u5165 if err != nil\u3002<\/p>\n
\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\uff0cGo \u4ee3\u7801\u4e2d\u6536\u96c6\u4e86\u8bb8\u591a\u8fd9\u6837\u7684\u7247\u6bb5\uff0c\u7ed3\u679c\u611f\u89c9\u5f88\u7b28\u62d9\u3002<\/p>\n
\u9519\u8bef\u662f\u503c<\/h2>\n
\u4e0d\u7ba1\u8fd9\u79cd\u89e3\u91ca\u662f\u5426\u5408\u9002\uff0c\u5f88\u660e\u663e\uff0c\u8fd9\u4e9b Go \u7a0b\u5e8f\u5458\u9519\u8fc7\u4e86\u5173\u4e8e\u9519\u8bef\u7684\u4e00\u4e2a\u57fa\u672c\u70b9\uff1a\u9519\u8bef\u662f\u503c\uff08Errors are values\uff09\u3002<\/p>\n
\u503c\u53ef\u4ee5\u88ab\u7f16\u7a0b\uff0c\u65e2\u7136\u9519\u8bef\u662f\u503c\uff0c\u90a3\u4e48\u9519\u8bef\u4e5f\u53ef\u4ee5\u88ab\u7f16\u7a0b\u3002<\/p>\n
\u5f53\u7136\uff0c\u6d89\u53ca\u9519\u8bef\u503c\u7684\u5e38\u89c1\u8bed\u53e5\u662f\u6d4b\u8bd5\u5b83\u662f\u5426\u4e3a nil\uff0c\u4f46\u662f\u8fd8\u6709\u65e0\u6570\u5176\u4ed6\u4e8b\u60c5\u53ef\u4ee5\u7528\u9519\u8bef\u503c\u505a\uff0c\u5e76\u4e14\u5e94\u7528\u5176\u4e2d\u4e00\u4e9b\u5176\u4ed6\u4e8b\u60c5\u53ef\u4ee5\u4f7f\u60a8\u7684\u7a0b\u5e8f\u66f4\u597d\uff0c\u6d88\u9664\u5f88\u591a\u6837\u677f\u3002<\/p>\n
\u5982\u679c\u4f7f\u7528\u6b7b\u8bb0\u786c\u80cc\u7684 if \u8bed\u53e5\u68c0\u67e5\u6bcf\u4e2a\u9519\u8bef\uff0c\u5c31\u4f1a\u51fa\u73b0\u8fd9\u79cd\u60c5\u51b5\uff08\u4e5f\u5c31\u662f if err != nil \u5230\u5904\u90fd\u662f\u7684\u60c5\u51b5\uff09\u3002<\/p>\n
bufio \u4f8b\u5b50<\/h3>\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u6765\u81ea bufio \u5305\u7684 Scanner \u7c7b\u578b\u7684\u7b80\u5355\u4f8b\u5b50\u3002\u5b83\u7684 Scan \u65b9\u6cd5\u6267\u884c\u4e86\u5e95\u5c42\u7684 I\/O\uff0c\u8fd9\u5f53\u7136\u4f1a\u5bfc\u81f4\u4e00\u4e2a\u9519\u8bef\u3002\u7136\u800c\uff0cScan \u65b9\u6cd5\u6839\u672c\u6ca1\u6709\u66b4\u9732\u51fa\u9519\u8bef\u3002<\/p>\n
\u76f8\u53cd\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u5e76\u5728\u626b\u63cf\u7ed3\u675f\u65f6\u8fd0\u884c\u4e00\u4e2a\u5355\u72ec\u7684\u65b9\u6cd5\uff0c\u62a5\u544a\u662f\u5426\u53d1\u751f\u9519\u8bef\u3002<\/p>\n
\u5ba2\u6237\u7aef\u4ee3\u7801\u770b\u8d77\u6765\u50cf\u8fd9\u6837\uff1a<\/p>\n
scanner := bufio.NewScanner(input)\nfor scanner.Scan() {\n    token := scanner.Text()\n    \/\/ process token\n}\nif err := scanner.Err(); err != nil {\n    \/\/ process the error\n}<\/code><\/pre>\n
\u5f53\u7136\uff0c\u6709\u4e00\u4e2a nil \u68c0\u67e5\u9519\u8bef\uff0c\u4f46\u5b83\u53ea\u51fa\u73b0\u5e76\u6267\u884c\u4e00\u6b21\u3002Scan \u65b9\u6cd5\u53ef\u4ee5\u6539\u4e3a\u5b9a\u4e49\u4e3a\uff1a<\/p>\n
func (s *Scanner) Scan() (token []byte, error)<\/code><\/pre>\n
\u7136\u540e\uff0c\u7528\u6237\u4ee3\u7801\u7684\u4f8b\u5b50\u53ef\u80fd\u662f\uff08\u53d6\u51b3\u4e8e\u5982\u4f55\u68c0\u7d22\u4ee4\u724c\uff09\uff1a<\/p>\n
scanner := bufio.NewScanner(input)\nfor {\n    token, err := scanner.Scan()\n    if err != nil {\n        return err \/\/ or maybe break\n    }\n    \/\/ process token\n}<\/code><\/pre>\n
\u8fd9\u5e76\u6ca1\u6709\u592a\u5927\u7684\u4e0d\u540c\uff0c\u4f46\u6709\u4e00\u4e2a\u91cd\u8981\u7684\u533a\u522b\u3002\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u5728\u6bcf\u6b21\u8fed\u4ee3\u65f6\u68c0\u67e5\u9519\u8bef\uff0c\u4f46\u5728\u771f\u6b63\u7684 Scanner API \u4e2d\uff0c\u9519\u8bef\u5904\u7406\u662f\u4ece\u5173\u952e API \u5143\u7d20\u4e2d\u62bd\u8c61\u51fa\u6765\u7684\uff0c\u5b83\u6b63\u5728\u8fed\u4ee3\u4ee4\u724c\u3002<\/p>\n
\u4f7f\u7528\u771f\u6b63\u7684 API\uff0c\u5ba2\u6237\u7aef\u7684\u4ee3\u7801\u56e0\u6b64\u611f\u89c9\u66f4\u81ea\u7136\uff1a\u5faa\u73af\u76f4\u5230\u5b8c\u6210\uff0c\u7136\u540e\u62c5\u5fc3\u9519\u8bef\u3002<\/p>\n
\u9519\u8bef\u5904\u7406\u4e0d\u4f1a\u63a9\u76d6\u63a7\u5236\u6d41\u7a0b\u3002<\/p>\n
\u5f53\u7136\uff0c\u5728\u5e55\u540e\u53d1\u751f\u7684\u4e8b\u60c5\u662f\uff0c\u4e00\u65e6 Scan \u9047\u5230 I\/O \u9519\u8bef\uff0c\u5b83\u5c31\u4f1a\u8bb0\u5f55\u5b83\u5e76\u8fd4\u56de false\u3002\u5f53\u5ba2\u6237\u7aef\u8be2\u95ee\u65f6\uff0c\u4e00\u4e2a\u5355\u72ec\u7684\u65b9\u6cd5 Err \u4f1a\u62a5\u544a\u9519\u8bef\u503c\u3002<\/p>\n
\u867d\u7136\u8fd9\u5f88\u5fae\u4e0d\u8db3\u9053\uff0c\u4f46\u5b83\u4e0e\u5728\u6bcf\u4e2a if err != nil<\/code> \u540e\u5230\u5904\u653e\u6216\u8981\u6c42\u5ba2\u6237\u7aef\u68c0\u67e5\u9519\u8bef\u662f\u4e0d\u4e00\u6837\u7684\u3002\u8fd9\u662f\u7528\u9519\u8bef\u503c\u7f16\u7a0b\u3002\u7b80\u5355\u7684\u7f16\u7a0b\uff0c\u662f\u7684\uff0c\u4f46\u4ecd\u7136\u662f\u7f16\u7a0b\u3002<\/p>\n
\u503c\u5f97\u5f3a\u8c03\u7684\u662f\uff0c\u65e0\u8bba\u8bbe\u8ba1\u5982\u4f55\uff0c\u7a0b\u5e8f\u68c0\u67e5\u9519\u8bef\u662f\u81f3\u5173\u91cd\u8981\u7684\uff0c\u65e0\u8bba\u5b83\u4eec\u66b4\u9732\u5728\u54ea\u91cc\u3002 \u8fd9\u91cc\u7684\u8ba8\u8bba\u4e0d\u662f\u5173\u4e8e\u5982\u4f55\u907f\u514d\u68c0\u67e5\u9519\u8bef\uff0c\u800c\u662f\u5173\u4e8e\u4f7f\u7528\u8bed\u8a00\u4f18\u96c5\u5730\u5904\u7406\u9519\u8bef\u3002<\/p>\n
\u5b9e\u6218\u63a2\u8ba8<\/h2>\n
\u5f53\u6211\u53c2\u52a0\u5728\u4e1c\u4eac\u4e3e\u884c\u7684 2014 \u5e74\u79cb\u5b63 GoCon \u65f6\uff0c\u51fa\u73b0\u4e86\u91cd\u590d\u9519\u8bef\u68c0\u67e5\u4ee3\u7801\u7684\u8bdd\u9898\u3002\u4e00\u4f4d\u70ed\u5fc3\u7684 Gopher\uff0c\u5728 Twitter \u4e0a\u7684\u540d\u5b57\u662f @jxck\/_\uff0c\u56de\u5e94\u4e86\u6211\u4eec\u719f\u6089\u7684\u5173\u4e8e\u9519\u8bef\u68c0\u67e5\u7684\u54c0\u53f9\u3002<\/p>\n
\u4ed6\u6709\u4e00\u4e9b\u4ee3\u7801\uff0c\u4ece\u7ed3\u6784\u4e0a\u770b\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n
_, err = fd.Write(p0[a:b])\nif err != nil {\n    return err\n}\n_, err = fd.Write(p1[c:d])\nif err != nil {\n    return err\n}\n_, err = fd.Write(p2[e:f])\nif err != nil {\n    return err\n}\n\/\/ and so on<\/code><\/pre>\n
\u5b83\u662f\u975e\u5e38\u91cd\u590d\u7684\u3002\u5728\u771f\u6b63\u7684\u4ee3\u7801\u4e2d\uff0c\u8fd9\u6bb5\u4ee3\u7801\u6bd4\u8f83\u957f\uff0c\u6709\u66f4\u591a\u7684\u4e8b\u60c5\u8981\u505a\uff0c\u6240\u4ee5\u4e0d\u5bb9\u6613\u53ea\u662f\u7528\u4e00\u4e2a\u8f85\u52a9\u51fd\u6570\u6765\u91cd\u6784\u8fd9\u6bb5\u4ee3\u7801\uff0c\u4f46\u5728\u8fd9\u79cd\u7406\u60f3\u5316\u7684\u5f62\u5f0f\u4e2d\uff0c\u4e00\u4e2a\u51fd\u6570\u5b57\u9762\u7684\u5173\u95ed\u5bf9\u9519\u8bef\u53d8\u91cf\u4f1a\u6709\u5e2e\u52a9\uff1a<\/p>\n
var err error\nwrite := func(buf []byte) {\n    if err != nil {\n        return\n    }\n    _, err = w.Write(buf)\n}\nwrite(p0[a:b])\nwrite(p1[c:d])\nwrite(p2[e:f])\n\/\/ and so on\nif err != nil {\n    return err\n}<\/code><\/pre>\n
\u8fd9\u79cd\u6a21\u5f0f\u6548\u679c\u5f88\u597d\uff0c\u4f46\u9700\u8981\u5728\u6bcf\u4e2a\u6267\u884c\u5199\u5165\u7684\u51fd\u6570\u4e2d\u5173\u95ed\uff1b \u5355\u72ec\u7684\u8f85\u52a9\u51fd\u6570\u4f7f\u7528\u8d77\u6765\u6bd4\u8f83\u7b28\u62d9\uff0c\u56e0\u4e3a\u9700\u8981\u5728\u8c03\u7528\u4e4b\u95f4\u7ef4\u62a4 err \u53d8\u91cf\uff08\u5c1d\u8bd5\u4e00\u4e0b\uff09\u3002<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u501f\u7528\u4e0a\u9762\u7684\u626b\u63cf\u65b9\u6cd5\u7684\u601d\u8def\uff0c\u4f7f\u4e4b\u66f4\u7b80\u6d01\u3001\u66f4\u901a\u7528\u3001\u66f4\u53ef\u91cd\u590d\u4f7f\u7528\u3002\u6211\u5728\u6211\u4eec\u7684\u8ba8\u8bba\u4e2d\u63d0\u5230\u4e86\u8fd9\u4e2a\u6280\u672f\uff0c\u4f46\u662f @jxck\/_ \u6ca1\u6709\u770b\u5230\u5982\u4f55\u5e94\u7528\u5b83\u3002\u7ecf\u8fc7\u957f\u65f6\u95f4\u7684\u4ea4\u6d41\uff0c\u5728\u8bed\u8a00\u4e0d\u901a\u7684\u60c5\u51b5\u4e0b\uff0c\u6211\u95ee\u80fd\u4e0d\u80fd\u501f\u4ed6\u7684\u7b14\u8bb0\u672c\uff0c\u6253\u4e00\u4e9b\u4ee3\u7801\u7ed9\u4ed6\u770b\u3002<\/p>\n
\u6211\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a errWriter \u7684\u5bf9\u8c61\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
type errWriter struct {\n    w   io.Writer\n    err error\n}<\/code><\/pre>\n
\u5e76\u7ed9\u4e86\u5b83\u4e00\u79cd\u65b9\u6cd5\uff0cWrite\u3002 \u5b83\u4e0d\u9700\u8981\u5177\u6709\u6807\u51c6\u7684 Write \u7b7e\u540d\uff0c\u5e76\u4e14\u90e8\u5206\u5c0f\u5199\u4ee5\u7a81\u51fa\u533a\u522b\u3002 write \u65b9\u6cd5\u8c03\u7528\u5e95\u5c42 Writer \u7684 Write \u65b9\u6cd5\uff0c\u5e76\u8bb0\u5f55\u7b2c\u4e00\u4e2a\u9519\u8bef\u4ee5\u5907\u53c2\u8003\uff1a<\/p>\n
func (ew *errWriter) write(buf []byte) {\n    if ew.err != nil {\n        return\n    }\n    _, ew.err = ew.w.Write(buf)\n}<\/code><\/pre>\n
\u4e00\u65e6\u53d1\u751f\u9519\u8bef\uff0cWrite \u65b9\u6cd5\u5c31\u4f1a\u53d8\u6210\u65e0\u7528\u529f\uff0c\u4f46\u9519\u8bef\u503c\u4f1a\u88ab\u4fdd\u5b58\u3002<\/p>\n
\u9274\u4e8e errWriter \u7c7b\u578b\u548c\u5b83\u7684 Write \u65b9\u6cd5\uff0c\u4e0a\u9762\u7684\u4ee3\u7801\u53ef\u4ee5\u88ab\u91cd\u6784\u4e3a\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n
ew := &errWriter{w: fd}\new.write(p0[a:b])\new.write(p1[c:d])\new.write(p2[e:f])\n\/\/ and so on\nif ew.err != nil {\n    return ew.err\n}<\/code><\/pre>\n
\u8fd9\u66f4\u5e72\u51c0\uff0c\u751a\u81f3\u4e0e\u4f7f\u7528\u95ed\u5305\u76f8\u6bd4\uff0c\u4e5f\u4f7f\u5b9e\u9645\u7684\u5199\u5165\u987a\u5e8f\u66f4\u5bb9\u6613\u5728\u9875\u9762\u4e0a\u770b\u5230\u3002\u4e0d\u518d\u6709\u6df7\u4e71\u3002\u4f7f\u7528\u9519\u8bef\u503c\uff08\u548c\u63a5\u53e3\uff09\u8fdb\u884c\u7f16\u7a0b\u4f7f\u4ee3\u7801\u66f4\u597d\u3002<\/p>\n
\u5f88\u53ef\u80fd\u540c\u4e00\u4e2a\u5305\u4e2d\u7684\u5176\u4ed6\u4e00\u4e9b\u4ee3\u7801\u53ef\u4ee5\u57fa\u4e8e\u8fd9\u4e2a\u60f3\u6cd5\uff0c\u751a\u81f3\u76f4\u63a5\u4f7f\u7528 errWriter\u3002<\/p>\n
\u53e6\u5916\uff0c\u4e00\u65e6 errWriter \u5b58\u5728\uff0c\u5b83\u53ef\u4ee5\u505a\u66f4\u591a\u7684\u4e8b\u60c5\u6765\u5e2e\u52a9\uff0c\u7279\u522b\u662f\u5728\u4e0d\u592a\u4eba\u6027\u5316\u7684\u4f8b\u5b50\u4e2d\u3002\u5b83\u53ef\u4ee5\u79ef\u7d2f\u5b57\u8282\u6570\u3002\u5b83\u53ef\u4ee5\u5c06\u5199\u5185\u5bb9\u51dd\u805a\u6210\u4e00\u4e2a\u7f13\u51b2\u533a\uff0c\u7136\u540e\u4ee5\u539f\u5b50\u65b9\u5f0f\u4f20\u8f93\u3002\u8fd8\u6709\u66f4\u591a\u3002<\/p>\n
\u4e8b\u5b9e\u4e0a\uff0c\u8fd9\u79cd\u6a21\u5f0f\u7ecf\u5e38\u51fa\u73b0\u5728\u6807\u51c6\u5e93\u4e2d\u3002 archive\/zip \u548c net\/http \u5305\u4f7f\u7528\u5b83\u3002 \u5728\u8fd9\u4e2a\u8ba8\u8bba\u4e2d\u66f4\u7a81\u51fa\u7684\u662f\uff0cbufio \u5305\u7684 Writer \u5b9e\u9645\u4e0a\u662f errWriter \u601d\u60f3\u7684\u4e00\u4e2a\u5b9e\u73b0\u3002 \u5c3d\u7ba1 bufio.Writer.Write \u8fd4\u56de\u9519\u8bef\uff0c\u4f46\u8fd9\u4e3b\u8981\u662f\u4e3a\u4e86\u5c0a\u91cd io.Writer \u63a5\u53e3\u3002 <\/p>\n
bufio.Writer \u7684 Write \u65b9\u6cd5\u7684\u884c\u4e3a\u5c31\u50cf\u6211\u4eec\u4e0a\u9762\u7684 errWriter.write \u65b9\u6cd5\u4e00\u6837\uff0cFlush \u4f1a\u62a5\u9519\uff0c\u6240\u4ee5\u6211\u4eec\u7684\u4f8b\u5b50\u53ef\u4ee5\u8fd9\u6837\u5199\uff1a<\/p>\n
b := bufio.NewWriter(fd)\nb.Write(p0[a:b])\nb.Write(p1[c:d])\nb.Write(p2[e:f])\n\/\/ and so on\nif b.Flush() != nil {\n    return b.Flush()\n}<\/code><\/pre>\n
\u8fd9\u79cd\u65b9\u6cd5\u6709\u4e00\u4e2a\u660e\u663e\u7684\u7f3a\u70b9\uff0c\u81f3\u5c11\u5bf9\u4e8e\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u800c\u8a00\uff1a\u6ca1\u6709\u529e\u6cd5\u77e5\u9053\u5728\u9519\u8bef\u53d1\u751f\u4e4b\u524d\u5b8c\u6210\u4e86\u591a\u5c11\u5904\u7406\u3002 \u5982\u679c\u8be5\u4fe1\u606f\u5f88\u91cd\u8981\uff0c\u5219\u9700\u8981\u66f4\u7ec6\u7c92\u5ea6\u7684\u65b9\u6cd5\u3002 \u4e0d\u8fc7\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6700\u540e\u8fdb\u884c\u5168\u6709\u6216\u5168\u65e0\u68c0\u67e5\u5c31\u8db3\u591f\u4e86\u3002<\/p>\n
\u603b\u7ed3<\/h2>\n
\u5728\u672c\u6587\u4e2d\u6211\u4eec\u53ea\u7814\u7a76\u4e86\u4e00\u79cd\u907f\u514d\u91cd\u590d\u9519\u8bef\u5904\u7406\u4ee3\u7801\u7684\u6280\u672f\u3002<\/p>\n
\u8bf7\u8bb0\u4f4f\uff0c\u4f7f\u7528 errWriter \u6216 bufio.Writer \u5e76\u4e0d\u662f\u7b80\u5316\u9519\u8bef\u5904\u7406\u7684\u552f\u4e00\u65b9\u6cd5\uff0c\u800c\u4e14\u8fd9\u79cd\u65b9\u6cd5\u5e76\u4e0d\u9002\u7528\u4e8e\u6240\u6709\u60c5\u51b5\u3002<\/p>\n
\u7136\u800c\uff0c\u5173\u952e\u7684\u6559\u8bad\u662f\u9519\u8bef\u662f\u503c\uff0cGo \u7f16\u7a0b\u8bed\u8a00\u7684\u5168\u90e8\u529f\u80fd\u53ef\u7528\u4e8e\u5904\u7406\u5b83\u4eec\u3002<\/p>\n
\u4f7f\u7528\u8be5\u8bed\u8a00\u6765\u7b80\u5316\u60a8\u7684\u9519\u8bef\u5904\u7406\u3002<\/p>\n
\u4f46\u8bf7\u8bb0\u4f4f\uff1a\u65e0\u8bba\u60a8\u505a\u4ec0\u4e48\uff0c\u90fd\u8981\u68c0\u67e5\u60a8\u7684\u9519\u8bef\uff01<\/p>\n
\u6587\u7ae0\u6301\u7eed\u66f4\u65b0\uff0c\u53ef\u4ee5\u5fae\u4fe1\u641c\u3010\u8111\u5b50\u8fdb\u714e\u9c7c\u4e86\u3011\u9605\u8bfb\uff0c\u672c\u6587 GitHub<\/strong> github.com\/eddycjy\/blog<\/a> \u5df2\u6536\u5f55\uff0c\u5b66\u4e60 Go \u8bed\u8a00\u53ef\u4ee5\u770b Go \u5b66\u4e60\u5730\u56fe\u548c\u8def\u7ebf<\/a>\uff0c\u6b22\u8fce Star \u50ac\u66f4\u3002<\/p><\/blockquote>\n
Go \u56fe\u4e66\u7cfb\u5217<\/h3>\n