{"id":44308,"date":"2023-03-04T13:27:50","date_gmt":"2023-06-08T12:54:00","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/golang%e7%ae%80%e5%8d%95%e6%8a%80%e5%b7%a7\/"},"modified":"2024-04-29T17:21:18","modified_gmt":"2024-04-29T09:21:18","slug":"golang%e7%ae%80%e5%8d%95%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/golang%e7%ae%80%e5%8d%95%e6%8a%80%e5%b7%a7\/","title":{"rendered":"golang\u7b80\u5355\u6280\u5de7"},"content":{"rendered":"

\u6211\u4f1a\u6574\u7406\u4e00\u4e9b\u6211\u5728\u4f7f\u7528golang\u65f6\u53d1\u73b0\u7684\u4e00\u4e9b\u5c0f\u6280\u5de7\u3002<\/p>\n

\u5de5\u5382\u8f6c\u6362<\/h2>\n

\u5728Golang\u4e2d\uff0c\u51fd\u6570\u662f\u4e00\u7b49\u516c\u6c11\uff0c\u56e0\u6b64\u53ef\u4ee5\u6839\u636e\u60c5\u51b5\u66ff\u6362\u67d0\u4e2a\u63a5\u53e3\u7684\u5de5\u5382\u65b9\u6cd5\u3002<\/p>\n

\/\/ \u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u8868\u3059\u69cb\u9020\u4f53<\/span>\r\ntype<\/span> User<\/span> struct<\/span> {<\/span>\r\n    Name<\/span> string<\/span>\r\n    Age<\/span>  int<\/span>\r\n}<\/span>\r\n\r\n\/\/ User\u306b\u95a2\u4fc2\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9<\/span>\r\ntype<\/span> UserRepo<\/span> interface<\/span> {<\/span>\r\n    FindByName<\/span>(<\/span>string<\/span>)<\/span> (<\/span>*<\/span>User<\/span>,<\/span> error<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\/\/ \u30e1\u30e2\u30ea\u4e0a\u306b\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u6301\u3063\u3066\u304a\u304f<\/span>\r\ntype<\/span> userRepoMem<\/span> struct<\/span> {<\/span>\r\n    mem<\/span> []<\/span>*<\/span>User<\/span>\r\n}<\/span>\r\nfunc<\/span> (<\/span>r<\/span> userRepoMem<\/span>)<\/span> FindByName<\/span>(<\/span>name<\/span> string<\/span>)<\/span> (<\/span>*<\/span>User<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    for<\/span> _<\/span>,<\/span> u<\/span> :=<\/span> range<\/span> r<\/span>.<\/span>mem<\/span> {<\/span>\r\n        if<\/span> u<\/span>.<\/span>Name<\/span> ==<\/span> name<\/span> {<\/span>\r\n            return<\/span> u<\/span>,<\/span> nil<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n    return<\/span> nil<\/span>,<\/span> errors<\/span>.<\/span>New<\/span>(<\/span>\"not found\"<\/span>)<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> newUserRepoByMem<\/span>()<\/span> Repo<\/span> {<\/span>\r\n    return<\/span> userRepoMem<\/span>{}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\/\/ SQLite\u4e0a\u306b\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u6301\u3063\u3066\u304a\u304f<\/span>\r\ntype<\/span> userRepoSQLite<\/span> struct<\/span> {<\/span>\r\n    db<\/span> *<\/span>sql<\/span>.<\/span>DB<\/span>\r\n}<\/span>\r\nfunc<\/span> (<\/span>r<\/span> userRepoSQLite<\/span>)<\/span> FindByName<\/span>(<\/span>name<\/span> string<\/span>)<\/span> (<\/span>*<\/span>User<\/span>,<\/span> error<\/span>){<\/span>\r\n    rows<\/span> :=<\/span> r<\/span>.<\/span>db<\/span>.<\/span>QueryRow<\/span>(<\/span>\"select * from user where name = ?\"<\/span>,<\/span> name<\/span>)<\/span>\r\n\r\n    user<\/span> :=<\/span> new<\/span>(<\/span>User<\/span>)<\/span>\r\n    err<\/span>  :=<\/span> rows<\/span>.<\/span>Scan<\/span>(<\/span>&<\/span>user<\/span>.<\/span>Name<\/span>,<\/span> &<\/span>user<\/span>.<\/span>Age<\/span>)<\/span>\r\n\r\n    return<\/span> user<\/span>,<\/span> err<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> newUserRepoBySQLite<\/span>()<\/span> Repo<\/span> {<\/span>\r\n    db<\/span>,<\/span> err<\/span> :=<\/span> sql<\/span>.<\/span>Open<\/span>(<\/span>\"sqlite3\"<\/span>,<\/span> \":memory:\"<\/span>)<\/span>\r\n    panic<\/span>(<\/span>err<\/span>)<\/span>\r\n\r\n    return<\/span> userRepoSQLite<\/span>{<\/span> db<\/span> }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
var<\/span> (<\/span>\r\n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u30e1\u30e2\u30ea\u5b9f\u88c5\u3092\u4f7f\u3046<\/span>\r\n    NewUserRepo<\/span> func<\/span>()<\/span> UserRepo<\/span> =<\/span> newUserRepoByMem<\/span>\r\n)<\/span>\r\n\r\n\/\/ \u5916\u90e8\u304b\u3089\u3069\u3061\u3089\u3092\u4f7f\u3046\u304b\u6c7a\u3081\u3089\u308c\u308b<\/span>\r\nfunc<\/span> UseMem<\/span>()<\/span> {<\/span>\r\n    NewUserRepo<\/span> =<\/span> newUserRepoByMem<\/span>\r\n}<\/span>\r\nfunc<\/span> UseSQLite<\/span>()<\/span> {<\/span>\r\n    NewUserRepo<\/span> =<\/span> newUserRepoBySQLite<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u867d\u7136\u6211\u4eec\u4ece\u5916\u90e8\u8fdb\u884c\u914d\u7f6e\uff0c\u4f46\u6839\u636e\u4f7f\u7528\u60c5\u51b5\uff0c\u6211\u8ba4\u4e3a\u53ef\u80fd\u4f1a\u6709\u4e00\u79cd\u5728\u5185\u90e8\u8fdb\u884c\u5207\u6362\u5e76\u786e\u8ba4\u4f7f\u7528\u54ea\u4e2a\u8bbe\u7f6e\u7684\u65b9\u6cd5\u3002<\/p>\n
\u8bf7\u53c2\u8003\u4ee5\u4e0b\u94fe\u63a5\uff1a
\nhttps:\/\/github.com\/GoogleCloudPlatform\/go-endpoints<\/p>\n
\u7ed3\u6784\u4f53{}<\/h2>\n
\u6ca1\u6709\u4efb\u4f55\u5b57\u6bb5\u7684\u7ed3\u6784\u4f53\u7684\u5927\u5c0f\u4e3a0\uff0c\u56e0\u6b64\u53ef\u4ee5\u7528\u4f5c”\u4e0d\u9700\u8981\u5177\u4f53\u503c\u7684\u865a\u62df\u53d8\u91cf”\u3002
\n\u4f8b\u5982\uff0c\u5728go\u8bed\u8a00\u4e2d\u6ca1\u6709set\uff0c\u6240\u4ee5\u53ef\u4ee5\u7528map\u4ee3\u66ffset\uff0c\u8fd9\u65f6\u53ef\u4ee5\u4f7f\u7528\u8fd9\u79cd\u7ed3\u6784\u4f53\u3002<\/p>\n
\/\/ \u8a18\u4e8b\u3092\u8868\u3059\u69cb\u9020\u4f53<\/span>\r\ntype<\/span> Post<\/span> struct<\/span> {<\/span>\r\n    OwnerID<\/span> int<\/span>\r\n    Title<\/span>   string<\/span>\r\n    Body<\/span>    string<\/span>\r\n}<\/span>\r\n\r\n\/\/ \u8a18\u4e8b\u7fa4\u304b\u3089\u7b46\u8005ID\u3092\u91cd\u8907\u306a\u3057\u3067\u629c\u304d\u51fa\u3059<\/span>\r\nposts<\/span>  :=<\/span> GetAllPost<\/span>()<\/span>\r\nowners<\/span> :=<\/span> func<\/span>()<\/span> []<\/span>int<\/span> {<\/span>\r\n    set<\/span> :=<\/span> make<\/span>(<\/span>map<\/span>[<\/span>int<\/span>]<\/span>struct<\/span>{})<\/span>\r\n    for<\/span> _<\/span>,<\/span> post<\/span> :=<\/span> range<\/span> posts<\/span> {<\/span>\r\n        set<\/span>[<\/span>post<\/span>.<\/span>OwnerID<\/span>]<\/span> =<\/span> struct<\/span>{}{}<\/span>\r\n    }<\/span>\r\n\r\n    res<\/span> :=<\/span> make<\/span>([]<\/span>int<\/span>,<\/span> 0<\/span>,<\/span> len<\/span>(<\/span>set<\/span>))<\/span>\r\n    for<\/span> id<\/span> :=<\/span> range<\/span> set<\/span> {<\/span>\r\n        res<\/span> =<\/span> append<\/span>(<\/span>res<\/span>,<\/span> id<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    return<\/span> res<\/span>\r\n}()<\/span>\r\n<\/code><\/pre>\n
\u8bf7\u53c2\u8003\u4ee5\u4e0b\u94fe\u63a5\uff1a
\nhttp:\/\/qiita.com\/najeira\/items\/47539ab346fa0c00dc62#tips-%E7%A9%BAstruct%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6<\/p>\n
x\/net\/context = x\/net\/\u4e0a\u4e0b\u6587<\/h2>\n
\u8c37\u6b4c\u53d1\u5e03\u4e86\u4e00\u4e9b\u975e\u6807\u51c6\u7684\u8f6f\u4ef6\u5305\uff0c\u5176\u4e2d\u5305\u62ecx\/net\/context\u3002
\n\u8fd9\u4e2a\u8f6f\u4ef6\u5305\u4f3c\u4e4e\u662f\u4e3a\u4e86\u5e76\u53d1\u5904\u7406\u800c\u8bbe\u8ba1\u7684\uff0c\u4f46\u4e5f\u4f3c\u4e4e\u88ab\u7528\u4f5c\u4e00\u822c\u7684\u4e0a\u4e0b\u6587\u3002
\n\u5b83\u5b9a\u4e49\u4e86NewContext \/ FromContext \u51fd\u6570\uff0c\u7528\u4e8e\u4e0e\u73b0\u6709\u4e0a\u4e0b\u6587\u7684\u5173\u8054\/ \u89e3\u9664\u5173\u8054\u3002<\/p>\n
package<\/span> database<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"database\/sql\"<\/span>\r\n    \"golang.org\/x\/net\/context\"<\/span>\r\n)<\/span>\r\n\r\nconst<\/span> (<\/span>\r\n    reqKey<\/span> =<\/span> \"database\"<\/span>\r\n)<\/span>\r\n\r\nfunc<\/span> NewContext<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> db<\/span> *<\/span>sql<\/span>.<\/span>DB<\/span>)<\/span> context<\/span>.<\/span>Context<\/span> {<\/span>\r\n    return<\/span> context<\/span>.<\/span>WithValue<\/span>(<\/span>ctx<\/span>,<\/span> reqKey<\/span>,<\/span> db<\/span>)<\/span>\r\n}<\/span>\r\nfunc<\/span> FromContext<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>)<\/span> *<\/span>sql<\/span>.<\/span>DB<\/span> {<\/span>\r\n    if<\/span> db<\/span>,<\/span> ok<\/span> :=<\/span> ctx<\/span>.<\/span>Value<\/span>(<\/span>reqKey<\/span>)<\/span>.<\/span>(<\/span>*<\/span>sql<\/span>.<\/span>DB<\/span>);<\/span> ok<\/span> {<\/span>\r\n        return<\/span> db<\/span>\r\n    }<\/span>\r\n    \/\/ \u3044\u3061\u304a\u3046nil\u3092\u8fd4\u3057\u3066\u3044\u308b\u3051\u3069\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u306e\u78ba\u8a8d\u306f\u3057\u306a\u3044\u3067\u8fd4\u3057\u3066\u3044\u308b\u4f8b\u3082\u3042\u308a\u307e\u3057\u305f<\/span>\r\n    return<\/span> nil<\/span>\r\n}<\/span>\r\n\r\n\/\/ ctx\u306b\u306fdb\u4ee5\u5916\u306b\u3082\u3044\u308d\u3044\u308d\u3068\u60c5\u5831\u304c\u5dfb\u304d\u8fbc\u307e\u308c\u3066\u3044\u308b<\/span>\r\nfunc<\/span> GetUserByName<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> name<\/span> string<\/span>)<\/span> (<\/span>*<\/span>User<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    \/\/ \u78ba\u5b9f\u306bctx\u306bdb\u304c\u5dfb\u304d\u8fbc\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u60f3\u5b9a\u3059\u308b<\/span>\r\n    db<\/span> :=<\/span> FromContext<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\r\n    \/\/ ... \u4ee5\u4e0bdb\u3092\u4f7f\u3063\u3066\u51e6\u7406\u3059\u308b<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53c2\u8003\u8d44\u6599\uff1a
\nhttps:\/\/github.com\/drone\/drone\/tree\/master\/server
\nhttps:\/\/github.com\/guregu\/kami
\nhttp:\/\/qiita.com\/nyarla\/items\/c89ee1ae8703cc459aec<\/p>\n
\u72ec\u7279\u7684\u5185\u90e8\u952e<\/h2>\n
x\/net\/context\u516c\u5f00\u4e86\u4e00\u4e2a\u540d\u4e3acontext.WithValue\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u5c06\u5b83\u4e0e\u73b0\u6709\u4e0a\u4e0b\u6587\u5173\u8054\u8d77\u6765\u3002
\n\u8c03\u7528\u6b64\u51fd\u6570\u9700\u8981\u63d0\u4f9b”\u73b0\u6709\u4e0a\u4e0b\u6587”\u3001”\u8981\u5173\u8054\u7684\u503c”\u548c”\u5728\u63d0\u53d6\u503c\u65f6\u4f7f\u7528\u7684\u952e\uff08\u7c7b\u578b\u4e3ainterface{}\uff09”\u3002
\n\u4e3a\u4e86\u786e\u4fdd\u952e\u7684\u552f\u4e00\u6027\uff0c\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u79c1\u6709\u7c7b\u578b\u7684\u79c1\u6709\u53d8\u91cf\u6765\u8f7b\u677e\u751f\u6210\u552f\u4e00\u952e\u3002<\/p>\n
\u5728\u4e4b\u524d\u7684\u4f8b\u5b50\u4e2d\uff0c<\/p>\n
\/\/ struct{}\u306e\u307e\u307e\u3060\u3068\u3069\u3053\u3067\u3082\u4f7f\u3048\u308b\u306e\u3067\u3001\u5225\u540d\u3092\u3064\u3051\u3066\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u306a\u578b\u306b\u3059\u308b<\/span>\r\ntype<\/span> private<\/span> struct<\/span>{}<\/span>\r\n\r\nvar<\/span> (<\/span>\r\n    reqKey<\/span> private<\/span>\r\n)<\/span>\r\n\r\nfunc<\/span> NewContext<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> db<\/span> *<\/span>sql<\/span>.<\/span>DB<\/span>)<\/span> context<\/span>.<\/span>Context<\/span> {<\/span>\r\n    return<\/span> context<\/span>.<\/span>WithValue<\/span>(<\/span>ctx<\/span>,<\/span> reqKey<\/span>,<\/span> db<\/span>)<\/span>\r\n}<\/span>\r\nfunc<\/span> FromContext<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>)<\/span> *<\/span>sql<\/span>.<\/span>DB<\/span> {<\/span>\r\n    if<\/span> db<\/span>,<\/span> ok<\/span> :=<\/span> ctx<\/span>.<\/span>Value<\/span>(<\/span>reqKey<\/span>)<\/span>.<\/span>(<\/span>*<\/span>sql<\/span>.<\/span>DB<\/span>);<\/span> ok<\/span> {<\/span>\r\n        return<\/span> db<\/span>\r\n    }<\/span>\r\n    return<\/span> nil<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5927\u6982\u7684\u60c5\u51b5\u662f\u8fd9\u6837\u7684\u3002\u5728golang\u4e2d\u65e0\u6cd5\u8fdb\u884c\u6307\u9488\u64cd\u4f5c\uff0c\u800c\u4e14\u4ee5\u5c0f\u5199\u5b57\u6bcd\u5f00\u5934\u7684\u53d8\u91cf\u5bf9\u5916\u90e8\u662f\u4e0d\u53ef\u89c1\u7684\uff0c\u6240\u4ee5\u6309\u7167\u6b63\u5e38\u7684\u65b9\u6cd5\u6765\u505a\u7684\u8bdd\uff0c\u4e0d\u5e94\u8be5\u4f1a\u6709\u91cd\u590d\u7684\u60c5\u51b5\u53d1\u751f\u3002
\n\uff08\u4f7f\u7528reflect\u6216\u8005unsafe\u7b49\u65b9\u5f0f\u53ef\u80fd\u53ef\u4ee5\u521b\u5efa\u4e0ereqKey\u76f8\u540c\u7684\u53d8\u91cf\uff0c\u4f46\u4e0d\u786e\u5b9a\u662f\u5426\u53ef\u884c\uff09<\/p>\n
\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5982\u679c\u5c06reqKey\u5b9a\u4e49\u4e3a\u4e00\u4e2astruct{}\uff0c\u5c06\u4f1a\u666e\u901a\u5730\u4ea7\u751f\u51b2\u7a81\u3002\u5b83\u88ab\u5b9a\u4e49\u4e3a\u79c1\u6709\u7c7b\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n
\u5982\u679c\u60a8\u60f3\u5728\u540c\u4e00\u5c01\u88c5\u4e2d\u521b\u5efa\u591a\u4e2aNewContext\/FromContext\u5bf9\u8c61\uff0c\u53ef\u80fd\u53ef\u4ee5\u8003\u8651\u83b7\u53d6\u4e00\u4e2a\u79c1\u6709int\u53d8\u91cf\u7684\u6307\u9488\u4e4b\u7c7b\u7684\u65b9\u6cd5\u3002\uff08\u83b7\u53d6struct{}\u7684\u6307\u9488\u4f1a\u5bfc\u81f4\u51b2\u7a81\uff09<\/p>\n
\u53c2\u8003\u6587\u732e\uff1a
\nhttps:\/\/github.com\/goji\/context\/blob\/master\/bridge.go
\nhttp:\/\/ikawaha.hateblo.jp\/entry\/2015\/03\/13\/013521
\nhttp:\/\/qiita.com\/nyarla\/items\/202d1ded0f576f1bb36b<\/p>\n
\u8bf7\u53c2\u8003\u4ee5\u4e0b\u94fe\u63a5\uff1a
\nhttps:\/\/github.com\/goji\/context\/blob\/master\/bridge.go
\nhttp:\/\/ikawaha.hateblo.jp\/entry\/2015\/03\/13\/013521
\nhttp:\/\/qiita.com\/nyarla\/items\/202d1ded0f576f1bb36b<\/p>\n
\u5168\u5c40\u53d8\u91cf<\/h2>\n
func<\/span> echo<\/span>(<\/span>msg<\/span> string<\/span>)<\/span> int<\/span> {<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>msg<\/span>)<\/span>\r\n    return<\/span> 0<\/span>\r\n}<\/span>\r\n\r\nvar<\/span> n<\/span> =<\/span> echo<\/span>(<\/span>\"global var\"<\/span>)<\/span>\r\n\r\nfunc<\/span> init<\/span>(){<\/span>\r\n    _<\/span> =<\/span> echo<\/span>(<\/span>\"init\"<\/span>)<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>(){<\/span>\r\n    _<\/span> =<\/span> echo<\/span>(<\/span>\"main\"<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5f53\u6211\u4eec\u8fd0\u884c\u8fd9\u6837\u7684golang\u6587\u4ef6\u65f6\uff0c\u6211\u4eec\u4f1a\u53d1\u73b0\u5728\u5168\u5c40\u53d8\u91cf\u521d\u59cb\u5316\u65f6\uff0c\u51fd\u6570\u8c03\u7528\u6bd4init\u51fd\u6570\u548cmain\u51fd\u6570\u65e9\u3002
\n\u6709\u4e00\u4e2a\u5229\u7528\u8fd9\u79cd\u7279\u6027\u7684\u5305\u53eb\u505aflag\u3002<\/p>\n
package<\/span> server<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"flag\"<\/span>\r\n    \"net\/http\"<\/span>\r\n    \"fmt\"<\/span>\r\n)<\/span>\r\n\r\nvar<\/span> port<\/span> =<\/span> flag<\/span>.<\/span>Int<\/span>(<\/span>\"port\"<\/span>,<\/span> 8080<\/span>,<\/span> \"listen post\"<\/span>)<\/span>\r\n\r\nfunc<\/span> Serve<\/span>(){<\/span>\r\n    http<\/span>.<\/span>HandleFunc<\/span>(<\/span>\"\/\"<\/span>,<\/span> func<\/span>(<\/span>w<\/span> http<\/span>.<\/span>ResponseWriter<\/span>,<\/span> r<\/span> *<\/span>http<\/span>.<\/span>Request<\/span>){<\/span>\r\n        fmt<\/span>.<\/span>Fprint<\/span>(<\/span>w<\/span>,<\/span> \"Hello World\"<\/span>)<\/span>\r\n    })<\/span>\r\n    http<\/span>.<\/span>ListenAndServe<\/span>(<\/span>fmt<\/span>.<\/span>Sprintf<\/span>(<\/span>\":%d\"<\/span>,<\/span> *<\/span>port<\/span>),<\/span> nil<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"flag\"<\/span>\r\n\r\n    \/\/ go build\u3059\u308b\u5834\u5408\u306f\u4e0b\u306eimport\u30d1\u30b9\u3092\u9069\u5b9c\u66f8\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044<\/span>\r\n    \".\/server\"<\/span>\r\n)<\/span>\r\n\r\nfunc<\/span> main<\/span>(){<\/span>\r\n    flag<\/span>.<\/span>Parse<\/span>()<\/span>\r\n\r\n    server<\/span>.<\/span>Serve<\/span>()<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u4f7f\u7528 “go build” \u547d\u4ee4\u7f16\u8bd1\u6b64\u4ee3\u7801\uff0c\u5e76\u8c03\u7528”.\/server -port=9000″\uff0c\u5728 http:\/\/localhost:9000 \u4e0a\u5c06\u663e\u793a “Hello World”\u3002\u8fd9\u79cd\u8de8\u591a\u4e2a\u5305\u5206\u53d1\u914d\u7f6e\u7684\u65b9\u6cd5\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n
\u53c2\u8003\uff1a
\nhttps:\/\/github.com\/drone\/config \uff08\u8fd9\u662f flag.FlagSet \u7684\u5305\u88c5\u5e93\u3002\u770b\u8d77\u6765\u5f88\u5bb9\u6613\u4f7f\u7528\uff0c\u4f46\u8bb8\u53ef\u8bc1\u4e0d\u592a\u6e05\u695a\uff09<\/p>\n
\u4e0d\u4f1a\u88ab\u63a8\u8350\u7684\u6280\u672f\u3002<\/h1>\n
\u8fd9\u53ef\u80fd\u4e0d\u662f\u4e00\u4e2a\u88ab\u63a8\u8350\u7684\u6280\u5de7\u3002\u8bf7\u628a\u5b83\u5f53\u4f5c\u4e00\u4e2a\u641e\u7b11\u8bdd\u9898\u3002<\/p>\n
_\u4ee3\u7801.go<\/h2>\n
\u5728 Golang \u4e2d\uff0c\u4ee5 _ \u5f00\u5934\u7684\u6587\u4ef6\u4e0d\u4f1a\u88ab\u7f16\u8bd1\u3002\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6839\u636e\u6e90\u4ee3\u7801\u5b9e\u73b0\u8fdb\u884c\u5207\u6362\u3002<\/p>\n
var<\/span> mem<\/span> []<\/span>*<\/span>User<\/span>\r\n\r\nfunc<\/span> GetUserByName<\/span>(<\/span>name<\/span> string<\/span>)<\/span> (<\/span>*<\/span>User<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    for<\/span> _<\/span>,<\/span> u<\/span> :=<\/span> range<\/span> mem<\/span> {<\/span>\r\n        if<\/span> u<\/span>.<\/span>Name<\/span> ==<\/span> name<\/span> {<\/span>\r\n            return<\/span> u<\/span>,<\/span> nil<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n    return<\/span> nil<\/span>,<\/span> errors<\/span>.<\/span>New<\/span>(<\/span>\"not found\"<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
var<\/span> db<\/span> *<\/span>sql<\/span>.<\/span>DB<\/span>\r\n\r\nfunc<\/span> GetUserByName<\/span>(<\/span>name<\/span> string<\/span>)<\/span> (<\/span>*<\/span>User<\/span>,<\/span> error<\/span>){<\/span>\r\n    rows<\/span> :=<\/span> db<\/span>.<\/span>QueryRow<\/span>(<\/span>\"select * from user where name = ?\"<\/span>,<\/span> name<\/span>)<\/span>\r\n\r\n    user<\/span> :=<\/span> new<\/span>(<\/span>User<\/span>)<\/span>\r\n    err<\/span>  :=<\/span> rows<\/span>.<\/span>Scan<\/span>(<\/span>&<\/span>user<\/span>.<\/span>Name<\/span>,<\/span> &<\/span>user<\/span>.<\/span>Age<\/span>)<\/span>\r\n\r\n    return<\/span> user<\/span>,<\/span> err<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u8fd9\u6837\uff0c\u6309\u7167\u6e90\u4ee3\u7801\u5355\u5143\u51c6\u5907\u5b9e\u73b0\uff0c\u672a\u4f7f\u7528\u7684\u90e8\u5206\u53ef\u6539\u4e3a\u50cf_~~~.go\u90a3\u6837\u8fdb\u884c\u5207\u6362\u3002
\n\u6700\u597d\u8fd8\u662f\u6b63\u5e38\u5730\u521b\u5efa\u63a5\u53e3\u2026\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"
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