{"id":47441,"date":"2023-01-19T12:45:15","date_gmt":"2023-10-22T22:05:36","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%ab%af%ef%bc%88%e7%ac%ac10%e8%af%be%ef%bc%89-graphql%e7%8b%ac%e6%9c%89%e7%9a%84%e4%b8%ad%e9%97%b4%e4%bb%b6\/"},"modified":"2024-04-29T10:31:15","modified_gmt":"2024-04-29T02:31:15","slug":"%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%ab%af%ef%bc%88%e7%ac%ac10%e8%af%be%ef%bc%89-graphql%e7%8b%ac%e6%9c%89%e7%9a%84%e4%b8%ad%e9%97%b4%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8go%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%ab%af%ef%bc%88%e7%ac%ac10%e8%af%be%ef%bc%89-graphql%e7%8b%ac%e6%9c%89%e7%9a%84%e4%b8%ad%e9%97%b4%e4%bb%b6\/","title":{"rendered":"\u4f7f\u7528Go\u8bed\u8a00\u5b66\u4e60GraphQL\u670d\u52a1\u5668\u7aef\uff08\u7b2c10\u8bfe\uff09- GraphQL\u72ec\u6709\u7684\u4e2d\u95f4\u4ef6"},"content":{"rendered":"

\u4f60\u597d\u3002<\/p>\n

\u6211\u5011\u5c07\u8ac7\u8ad6\u6709\u95dc\u300cGraphQL\u7368\u7279\u7684\u4e2d\u9593\u4ef6\u300d\u7684\u8a71\u984c\u3002<\/p>\n

\u5173\u4e8e\u8fd9\u4e00\u7ae0<\/h1>\n

\u5728\u4e4b\u524d\u7684\u7ae0\u8282\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u7c7b\u4f3c\u4e2d\u95f4\u4ef6\u7684\u6269\u5c55\uff08Extension\uff09\u529f\u80fd\u6765\u6839\u636e\u67e5\u8be2\u590d\u6742\u5ea6\u6765\u51b3\u5b9a\u662f\u5426\u63a5\u53d7\u8bf7\u6c42\u3002\u7136\u800c\uff0cGraphQL \u8fd8\u6709\u5176\u4ed6\u4e00\u4e9b\u4e2d\u95f4\u4ef6\uff0c\u53ef\u4ee5\u5728\u89e3\u6790\u5668\u7684\u524d\u540e\u63d2\u5165\u903b\u8f91\u5904\u7406\u3002\u5728\u672c\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u5b83\u4eec\u3002<\/p>\n

\u53ef\u4ee5\u5e94\u7528\u4e8eGraphQL\u670d\u52a1\u5668\u7684\u4e2d\u95f4\u4ef6<\/h1>\n

\u5728 github.com\/99designs\/gqlgen\/graphql \u4e2d\u5b9a\u4e49\u7684\u4e2d\u95f4\u4ef6\u603b\u5171\u6709\u56db\u79cd\u7c7b\u578b\u3002<\/p>\n

type<\/span> OperationMiddleware<\/span> func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> OperationHandler<\/span>)<\/span> ResponseHandler<\/span>\r\ntype<\/span> ResponseMiddleware<\/span> func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> ResponseHandler<\/span>)<\/span> *<\/span>Response<\/span>\r\ntype<\/span> RootFieldMiddleware<\/span> func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> RootResolver<\/span>)<\/span> Marshaler<\/span>\r\ntype<\/span> FieldMiddleware<\/span> func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> Resolver<\/span>)<\/span> (<\/span>res<\/span> interface<\/span>{},<\/span> err<\/span> error<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u4e2d\u6587\u7ffb\u8bd1\u9009\u9879\uff1a
\n– \u4e2d\u95f4\u4ef6\u7684\u5f15\u5165\u65b9\u6cd5 de
\n– \u5f15\u5165\u4e2d\u95f4\u4ef6\u7684\u65b9\u6cd5 de
\n– \u4e2d\u95f4\u4ef6\u7684\u5b89\u88c5\u6307\u5357 de
\n– \u5b89\u88c5\u4e2d\u95f4\u4ef6\u7684\u65b9\u6cd5 de<\/h2>\n
\u4e3a\u4e86\u5c06\u8fd9\u4e9b\u4e2d\u95f4\u4ef6\u5f15\u5165\u5230GraphQL\u670d\u52a1\u5668\u4e2d\uff0c\u9700\u8981\u4f7f\u7528\u4ee5\u4e0b\u63d0\u4f9b\u5728Server\u7ed3\u6784\u4f53\u4e2d\u7684\u65b9\u6cd5\u3002<\/p>\n
func<\/span> (<\/span>s<\/span> *<\/span>Server<\/span>)<\/span> AroundOperations<\/span>(<\/span>f<\/span> graphql<\/span>.<\/span>OperationMiddleware<\/span>)<\/span>\r\nfunc<\/span> (<\/span>s<\/span> *<\/span>Server<\/span>)<\/span> AroundResponses<\/span>(<\/span>f<\/span> graphql<\/span>.<\/span>ResponseMiddleware<\/span>)<\/span>\r\nfunc<\/span> (<\/span>s<\/span> *<\/span>Server<\/span>)<\/span> AroundRootFields<\/span>(<\/span>f<\/span> graphql<\/span>.<\/span>RootFieldMiddleware<\/span>)<\/span>\r\nfunc<\/span> (<\/span>s<\/span> *<\/span>Server<\/span>)<\/span> AroundFields<\/span>(<\/span>f<\/span> graphql<\/span>.<\/span>FieldMiddleware<\/span>)<\/span>\r\n<\/code><\/pre>\n
func<\/span> main<\/span>()<\/span> {<\/span>\r\n\t\/\/ (\u4e2d\u7565)<\/span>\r\n\r\n\tsrv<\/span> :=<\/span> handler<\/span>.<\/span>NewDefaultServer<\/span>(<\/span>internal<\/span>.<\/span>NewExecutableSchema<\/span>(<\/span>internal<\/span>.<\/span>Config<\/span>{<\/span>\r\n\t\tResolvers<\/span>:<\/span> &<\/span>graph<\/span>.<\/span>Resolver<\/span>{<\/span>\r\n\t\t\tSrv<\/span>:<\/span>     service<\/span>,<\/span>\r\n\t\t\tLoaders<\/span>:<\/span> graph<\/span>.<\/span>NewLoaders<\/span>(<\/span>service<\/span>),<\/span>\r\n\t\t},<\/span>\r\n\t\tComplexity<\/span>:<\/span> graph<\/span>.<\/span>ComplexityConfig<\/span>(),<\/span>\r\n\t}))<\/span>\r\n+<\/span>\tsrv<\/span>.<\/span>AroundRootFields<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>RootResolver<\/span>)<\/span> graphql<\/span>.<\/span>Marshaler<\/span> {<\/span>\r\n+<\/span>\t\t\/\/ (\u51e6\u7406\u5185\u5bb9)<\/span>\r\n+<\/span>\t})<\/span>\r\n+<\/span>\tsrv<\/span>.<\/span>AroundOperations<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>OperationHandler<\/span>)<\/span> graphql<\/span>.<\/span>ResponseHandler<\/span> {<\/span>\r\n+<\/span>\t\t\/\/ (\u51e6\u7406\u5185\u5bb9)<\/span>\r\n+<\/span>\t})<\/span>\r\n+<\/span>\tsrv<\/span>.<\/span>AroundResponses<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>ResponseHandler<\/span>)<\/span> *<\/span>graphql<\/span>.<\/span>Response<\/span> {<\/span>\r\n+<\/span>\t\t\/\/ (\u51e6\u7406\u5185\u5bb9)<\/span>\r\n+<\/span>\t})<\/span>\r\n+<\/span>\tsrv<\/span>.<\/span>AroundFields<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>Resolver<\/span>)<\/span> (<\/span>res<\/span> interface<\/span>{},<\/span> err<\/span> error<\/span>)<\/span> {<\/span>\r\n+<\/span>\t\t\/\/ (\u51e6\u7406\u5185\u5bb9)<\/span>\r\n+<\/span>\t})<\/span>\r\n\r\n\thttp<\/span>.<\/span>Handle<\/span>(<\/span>\"\/\"<\/span>,<\/span> playground<\/span>.<\/span>Handler<\/span>(<\/span>\"GraphQL playground\"<\/span>,<\/span> \"\/query\"<\/span>))<\/span>\r\n\thttp<\/span>.<\/span>Handle<\/span>(<\/span>\"\/query\"<\/span>,<\/span> srv<\/span>)<\/span>\r\n\r\n\tlog<\/span>.<\/span>Printf<\/span>(<\/span>\"connect to http:\/\/localhost:%s\/ for GraphQL playground\"<\/span>,<\/span> port<\/span>)<\/span>\r\n\tlog<\/span>.<\/span>Fatal<\/span>(<\/span>http<\/span>.<\/span>ListenAndServe<\/span>(<\/span>\":\"<\/span>+<\/span>port<\/span>,<\/span> nil<\/span>))<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e0d\u540c\u79cd\u7c7b\u7684\u4e2d\u95f4\u4ef6\u529f\u80fd<\/h2>\n
\u4ece\u8fd9\u91cc\u5f00\u59cb\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u56db\u79cd\u4e2d\u95f4\u4ef6\u6bcf\u79cd\u7684\u529f\u80fd\u662f\u4ec0\u4e48\u3002<\/p>\n
\u64cd\u4f5c\u4e2d\u95f4\u4ef6<\/h3>\n
\u5728\u63a5\u6536\u5230\u5ba2\u6237\u7aef\u8bf7\u6c42\u65f6\uff0c\u64cd\u4f5c\u4e2d\u95f4\u4ef6\u662f\u9996\u5148\u88ab\u8c03\u7528\u7684\u4e2d\u95f4\u4ef6\u3002
\n\u5728\u7ecf\u8fc7\u8be5\u4e2d\u95f4\u4ef6\u7684\u5904\u7406\u4e4b\u540e\uff0c\u8fdb\u5165\u89e3\u91ca\u5b9e\u9645\u53d1\u9001\u8fc7\u6765\u7684\u67e5\u8be2\u7684\u6b65\u9aa4\u3002<\/p>\n
type<\/span> OperationMiddleware<\/span> func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> OperationHandler<\/span>)<\/span> ResponseHandler<\/span>\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528\u5b9e\u4f8b\u3002<\/p>\n
srv<\/span>.<\/span>AroundOperations<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>OperationHandler<\/span>)<\/span> graphql<\/span>.<\/span>ResponseHandler<\/span> {<\/span>\r\n\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before OperationHandler\"<\/span>)<\/span>\r\n\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\tdefer<\/span> log<\/span>.<\/span>Println<\/span>(<\/span>\"after OperationHandler\"<\/span>)<\/span>\r\n\treturn<\/span> res<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
2023\/12\/12 23:36:46 connect to http:\/\/localhost:8080\/ for GraphQL playground\r\n2023\/12\/12 23:37:02 before OperationHandler\r\n2023\/12\/12 23:37:02 after OperationHandler\r\n<\/span><\/code><\/pre>\n
\u54cd\u5e94\u4e2d\u95f4\u4ef6<\/h3>\n
ResponseMiddleware\u8d1f\u8d23\u5728\u7ecf\u8fc7OperationMiddleware\u7684\u524d\u540e\u5904\u7406\u4e4b\u540e\uff0c\u521b\u5efa\u8981\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u7684\u54cd\u5e94\u7684\u524d\u540e\u5904\u7406\u9636\u6bb5\u3002<\/p>\n
type<\/span> ResponseMiddleware<\/span> func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> ResponseHandler<\/span>)<\/span> *<\/span>Response<\/span>\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528\u793a\u4f8b\u3002<\/p>\n
srv<\/span>.<\/span>AroundOperations<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>OperationHandler<\/span>)<\/span> graphql<\/span>.<\/span>ResponseHandler<\/span> {<\/span>\r\n\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before OperationHandler\"<\/span>)<\/span>\r\n\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\tdefer<\/span> log<\/span>.<\/span>Println<\/span>(<\/span>\"after OperationHandler\"<\/span>)<\/span>\r\n\treturn<\/span> res<\/span>\r\n})<\/span>\r\n+<\/span>srv<\/span>.<\/span>AroundResponses<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>ResponseHandler<\/span>)<\/span> *<\/span>graphql<\/span>.<\/span>Response<\/span> {<\/span>\r\n+<\/span>\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before ResponseHandler\"<\/span>)<\/span>\r\n+<\/span>\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n+<\/span>\tdefer<\/span> log<\/span>.<\/span>Println<\/span>(<\/span>\"after ResponseHandler\"<\/span>)<\/span>\r\n+<\/span>\treturn<\/span> res<\/span>\r\n+<\/span>})<\/span>\r\n<\/code><\/pre>\n
2023\/12\/12 23:47:27 connect to http:\/\/localhost:8080\/ for GraphQL playground\r\n2023\/12\/12 23:47:42 before OperationHandler\r\n2023\/12\/12 23:47:42 after OperationHandler\r\n2023\/12\/12 23:47:42 before ResponseHandler\r\n2023\/12\/12 23:47:42 after ResponseHandler\r\n<\/span><\/code><\/pre>\n
\u53ef\u4ee5\u770b\u51fa\uff0cOperationMiddleware\u7684\u540e\u7eed\u5904\u7406\u5728ResponseMiddleware\u7684\u524d\u5e8f\u5904\u7406\u4e4b\u524d\u8fdb\u884c\u3002<\/p>\n
\u6839\u9886\u57df\u4e2d\u95f4\u4ef6<\/h3>\n
RootFieldMiddleware\u662f\u4e00\u4e2a\u4e2d\u95f4\u4ef6\uff0c\u53ef\u4ee5\u5728\u6267\u884c\u6839\u89e3\u6790\u5668\u521b\u5efa\u6574\u4e2a\u54cd\u5e94\u6570\u636e\u4e4b\u524d\u548c\u4e4b\u540e\u63d2\u5165\u5904\u7406\u8fc7\u7a0b\u3002<\/p>\n
type<\/span> RootFieldMiddleware<\/span> func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> RootResolver<\/span>)<\/span> Marshaler<\/span>\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u5229\u7528\u793a\u4f8b\u3002<\/p>\n
srv<\/span>.<\/span>AroundResponses<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>ResponseHandler<\/span>)<\/span> *<\/span>graphql<\/span>.<\/span>Response<\/span> {<\/span>\r\n\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before ResponseHandler\"<\/span>)<\/span>\r\n\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\tdefer<\/span> log<\/span>.<\/span>Println<\/span>(<\/span>\"after ResponseHandler\"<\/span>)<\/span>\r\n\treturn<\/span> res<\/span>\r\n})<\/span>\r\n+<\/span>srv<\/span>.<\/span>AroundRootFields<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>RootResolver<\/span>)<\/span> graphql<\/span>.<\/span>Marshaler<\/span> {<\/span>\r\n+<\/span>\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before RootResolver\"<\/span>)<\/span>\r\n+<\/span>\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n+<\/span>\tdefer<\/span> func<\/span>()<\/span> {<\/span>\r\n+<\/span>\t\tvar<\/span> b<\/span> bytes<\/span>.<\/span>Buffer<\/span>\r\n+<\/span>\t\tres<\/span>.<\/span>MarshalGQL<\/span>(<\/span>&<\/span>b<\/span>)<\/span>\r\n+<\/span>\t\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"after RootResolver\"<\/span>,<\/span> b<\/span>.<\/span>String<\/span>())<\/span>\r\n+<\/span>\t}()<\/span>\r\n+<\/span>\treturn<\/span> res<\/span>\r\n+<\/span>})<\/span>\r\n<\/code><\/pre>\n
2023\/12\/13 00:02:16 connect to http:\/\/localhost:8080\/ for GraphQL playground\r\n2023\/12\/13 00:02:21 before ResponseHandler\r\n2023\/12\/13 00:02:21 before RootResolver\r\n2023\/12\/13 00:02:21 after RootResolver {\"id\":\"PJ_1\",\"title\":\"My Project\",\"url\":\"http:\/\/example.com\/project\/1\"}\r\n2023\/12\/13 00:02:21 after ResponseHandler\r\n<\/span><\/code><\/pre>\n
\u4e0eResponseMiddleware\u7684\u5173\u7cfb\u5982\u4e0b\u3002<\/p>\n
    \n
  1. \n
      \u5728\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u4e4b\u524d\u521b\u5efa\u54cd\u5e94\uff08\u901a\u8fc7ResponseMiddleware\u8fdb\u884c\u524d\u5904\u7406\uff09<\/ol>\n<\/li>\n<\/ol>\n
       <\/p>\n
        \n
      1. \n
          \u521b\u5efa\u54cd\u5e94<\/ol>\n<\/li>\n<\/ol>\n
           <\/p>\n
            \n
          1. \n
              \u5728\u6267\u884c\u6839\u89e3\u6790\u5668\u4e4b\u524d\u6267\u884c\uff08\u901a\u8fc7RootFieldMiddleware\u8fdb\u884c\u524d\u5904\u7406\uff09<\/ol>\n<\/li>\n<\/ol>\n
               <\/p>\n
                \n
              1. \n
                  \u6267\u884c\u6839\u89e3\u6790\u5668\u5e76\u6536\u96c6\u54cd\u5e94\u6240\u9700\u7684\u6570\u636e<\/ol>\n<\/li>\n<\/ol>\n
                   <\/p>\n
                    \n
                  1. \n
                      \u5728\u6267\u884c\u6839\u89e3\u6790\u5668\u4e4b\u540e\u6267\u884c\uff08\u901a\u8fc7RootFieldMiddleware\u8fdb\u884c\u540e\u5904\u7406\uff09<\/ol>\n<\/li>\n<\/ol>\n
                       <\/p>\n
                        \n
                      1. \n
                          \u5c06\u6267\u884c\u7ed3\u679c\u7f16\u7801\u4e3aJSON\u5e76\u4f5c\u4e3a\u54cd\u5e94\u6570\u636e<\/ol>\n<\/li>\n<\/ol>\n
                           <\/p>\n
                            \u5728\u521b\u5efa\u54cd\u5e94\u4e4b\u540e\u6267\u884c\uff08\u901a\u8fc7ResponseMiddleware\u8fdb\u884c\u540e\u5904\u7406\uff09<\/ol>\n
                            \u9886\u57df\u4e2d\u95f4\u4ef6<\/h3>\n
                            Graphql\u7684\u54cd\u5e94\u4f53\u662fjson\u683c\u5f0f\u7684\uff0c\u6b63\u5982\u60a8\u6240\u77e5\uff0cjson\u7531\u8bb8\u591a\u952e\u503c\u5bf9\u7684\u5b57\u6bb5\u7ec4\u6210\u3002
                            \nFieldMiddleware\u662f\u4e00\u79cd\u4e2d\u95f4\u4ef6\uff0c\u7528\u4e8e\u5728\u521b\u5efa\u5305\u542b\u5728\u54cd\u5e94\u4e2d\u7684json\u5b57\u6bb5\u4e4b\u524d\u548c\u4e4b\u540e\u6dfb\u52a0\u903b\u8f91\u5904\u7406\u3002<\/p>\n
                            type<\/span> FieldMiddleware<\/span> func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> Resolver<\/span>)<\/span> (<\/span>res<\/span> interface<\/span>{},<\/span> err<\/span> error<\/span>)<\/span>\r\n<\/code><\/pre>\n
                            \u6211\u4f1a\u5728\u4e0b\u9762\u5217\u4e3e\u4e00\u4e9b\u5229\u7528\u7684\u4f8b\u5b50\u3002<\/p>\n
                            srv<\/span>.<\/span>AroundRootFields<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>RootResolver<\/span>)<\/span> graphql<\/span>.<\/span>Marshaler<\/span> {<\/span>\r\n\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before RootResolver\"<\/span>)<\/span>\r\n\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\tdefer<\/span> func<\/span>()<\/span> {<\/span>\r\n\t\tvar<\/span> b<\/span> bytes<\/span>.<\/span>Buffer<\/span>\r\n\t\tres<\/span>.<\/span>MarshalGQL<\/span>(<\/span>&<\/span>b<\/span>)<\/span>\r\n\t\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"after RootResolver\"<\/span>,<\/span> b<\/span>.<\/span>String<\/span>())<\/span>\r\n\t}()<\/span>\r\n\treturn<\/span> res<\/span>\r\n})<\/span>\r\n+<\/span>srv<\/span>.<\/span>AroundFields<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>Resolver<\/span>)<\/span> (<\/span>res<\/span> interface<\/span>{},<\/span> err<\/span> error<\/span>)<\/span> {<\/span>\r\n+<\/span>\tres<\/span>,<\/span> err<\/span> =<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n+<\/span>\tlog<\/span>.<\/span>Println<\/span>(<\/span>res<\/span>)<\/span>\r\n+<\/span>\treturn<\/span>\r\n+<\/span>})<\/span>\r\n<\/code><\/pre>\n
                            \u5728\u6dfb\u52a0\u4e86FieldMiddleware\u4e4b\u540e\uff0c\u6309\u7167\u4ee5\u4e0b\u7684\u65b9\u5f0f\u53d1\u9001\u8bf7\u6c42\u3002<\/p>\n
                            query<\/span> {<\/span>\r\n  node<\/span>(<\/span>id<\/span>:<\/span> \"PJ_1\"<\/span>)<\/span> {<\/span>\r\n    id<\/span>\r\n    ...<\/span> on<\/span> ProjectV2<\/span> {<\/span>\r\n      title<\/span>\r\n      url<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                            \u5bf9\u4e8e\u8fd9\u4e2a\u67e5\u8be2\uff0c\u54cd\u5e94\u5305\u542b\u56db\u4e2a JSON \u5b57\u6bb5\uff0c\u5206\u522b\u662f\u201cnode\u201d\u3001 \u201cid\u201d\u3001 \u201ctitle\u201d \u548c\u201curl\u201d\u3002<\/p>\n
                            {<\/span>\r\n  \"data\"<\/span>:<\/span> {<\/span>\r\n    \"node\"<\/span>:<\/span> {<\/span>\r\n      \"id\"<\/span>:<\/span> \"PJ_1\"<\/span>,<\/span>\r\n      \"title\"<\/span>:<\/span> \"My Project\"<\/span>,<\/span>\r\n      \"url\"<\/span>:<\/span> \"http:\/\/example.com\/project\/1\"<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                            \u56e0\u6b64\uff0c\u8c03\u7528FieldMiddleware\u7684\u9884\u5904\u7406\u548c\u540e\u5904\u7406\u96c6\u5408\u5c06\u4f1a\u53d1\u751f4\u6b21\u3002<\/p>\n
                            2023\/12\/12 23:55:35 connect to http:\/\/localhost:8080\/ for GraphQL playground\r\n2023\/12\/12 23:55:38 before RootResolver\r\n2023\/12\/12 23:55:38 before Resolver\r\n<\/span>2023\/12\/12 23:55:38 after Resolver &{PJ_1 My Project {http   example.com \/project\/1  false false   } 1 <nil><\/span> 0xc000283a40}<\/span>\r\n2023\/12\/12 23:55:38 before Resolver\r\n2023\/12\/12 23:55:38 after Resolver PJ_1\r\n2023\/12\/12 23:55:38 before Resolver\r\n2023\/12\/12 23:55:38 after Resolver My Project\r\n2023\/12\/12 23:55:38 before Resolver\r\n2023\/12\/12 23:55:38 after Resolver {http   example.com \/project\/1  false false   }\r\n2023\/12\/12 23:55:38 after RootResolver {\"id\":\"PJ_1\",\"title\":\"My Project\",\"url\":\"http:\/\/example.com\/project\/1\"}\r\n<\/span><\/code><\/pre>\n
                            \u6b64\u5916\uff0c\u4e0eRootFieldMiddleware\u7684\u5173\u7cfb\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
                              \n
                            1. \n
                                \u6267\u884c\u6839\u89e3\u6790\u5668\u4e4b\u524d\uff08=\u6839\u5b57\u6bb5\u4e2d\u95f4\u4ef6\u7684\u524d\u5904\u7406\uff09<\/ol>\n<\/li>\n<\/ol>\n
                                 <\/p>\n
                                  \n
                                1. \n
                                    \u6267\u884c\u6839\u89e3\u6790\u5668<\/ol>\n<\/li>\n<\/ol>\n
                                     <\/p>\n
                                      \n
                                    1. \n
                                        \u5728\u521b\u5efa\u5b57\u6bb5\u4e4b\u524d\uff08=\u5b57\u6bb5\u4e2d\u95f4\u4ef6\u7684\u524d\u5904\u7406\uff09<\/ol>\n<\/li>\n<\/ol>\n
                                         <\/p>\n
                                          \n
                                        1. \n
                                            \u6536\u96c6\u9700\u8981\u7684\u6570\u636e\u5e76\u521b\u5efa\u54cd\u5e94\u5b57\u6bb5<\/ol>\n<\/li>\n<\/ol>\n
                                             <\/p>\n
                                              \n
                                            1. \n
                                                \u5728\u521b\u5efa\u5b57\u6bb5\u4e4b\u540e\uff08=\u5b57\u6bb5\u4e2d\u95f4\u4ef6\u7684\u540e\u5904\u7406\uff09<\/ol>\n<\/li>\n<\/ol>\n
                                                 <\/p>\n
                                                  \n
                                                1. \n
                                                    \u56de\u5230\u6b65\u9aa41\uff0c\u76f4\u5230\u6240\u6709\u5fc5\u8981\u7684\u5b57\u6bb5\u90fd\u88ab\u521b\u5efa<\/ol>\n<\/li>\n<\/ol>\n
                                                     <\/p>\n
                                                      \u6267\u884c\u6839\u89e3\u6790\u5668\uff08=\u6839\u5b57\u6bb5\u4e2d\u95f4\u4ef6\u7684\u540e\u5904\u7406\uff09<\/ol>\n
                                                      \u603b\u7ed3 – \u5404\u4e2d\u95f4\u4ef6\u4e4b\u95f4\u7684\u5173\u7cfb<\/h1>\n
                                                      \u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u5df2\u7ecf\u4ecb\u7ecd\u4e86GraphQL\u6240\u63d0\u4f9b\u7684\u56db\u79cd\u4e2d\u95f4\u4ef6\u3002<\/p>\n
                                                      OperationMiddleware: \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u3051\u53d6\u3063\u305f\u3068\u304d\u306b\u6700\u521d\u306b\u547c\u3070\u308c\u308b<\/p>\n
                                                      ResponseMiddleware: \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u8fd4\u3059\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3068\u3044\u3046\u6bb5\u968e\u306e\u524d\u5f8c\u51e6\u7406\u3092\u62c5\u3046<\/p>\n
                                                      RootFieldMiddleware: \u30ec\u30b9\u30dd\u30f3\u30b9\u30c7\u30fc\u30bf\u5168\u4f53\u3092\u4f5c\u6210\u3059\u308b\u30eb\u30fc\u30c8\u30ea\u30be\u30eb\u30d0\u306e\u5b9f\u884c\u524d\u5f8c\u306b\u51e6\u7406\u3092\u633f\u5165\u3059\u308b\u30df\u30c9\u30eb\u30a6\u30a7\u30a2<\/p>\n
                                                      FieldMiddleware: \u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u542b\u3081\u308bjson\u30d5\u30a3\u30fc\u30eb\u30c9\u30921\u3064\u4f5c\u308b\u51e6\u7406\u306e\u524d\u5f8c\u306b\u30ed\u30b8\u30c3\u30af\u3092\u7d44\u307f\u8fbc\u3080\u305f\u3081\u306e\u30df\u30c9\u30eb\u30a6\u30a7\u30a2<\/p>\n
                                                      \u6700\u540e\uff0c\u6211\u4eec\u5c06\u603b\u7ed3\u5e76\u786e\u8ba4\u5728\u540c\u65f6\u4f7f\u7528\u8fd9\u56db\u4e2a\u7684\u60c5\u51b5\u4e0b\uff0c\u5c06\u4f1a\u4ea7\u751f\u4ec0\u4e48\u6837\u7684\u6267\u884c\u987a\u5e8f\u3002<\/p>\n
                                                      srv<\/span>.<\/span>AroundOperations<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>OperationHandler<\/span>)<\/span> graphql<\/span>.<\/span>ResponseHandler<\/span> {<\/span>\r\n\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before OperationHandler\"<\/span>)<\/span>\r\n\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\tdefer<\/span> log<\/span>.<\/span>Println<\/span>(<\/span>\"after OperationHandler\"<\/span>)<\/span>\r\n\treturn<\/span> res<\/span>\r\n})<\/span>\r\nsrv<\/span>.<\/span>AroundResponses<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>ResponseHandler<\/span>)<\/span> *<\/span>graphql<\/span>.<\/span>Response<\/span> {<\/span>\r\n\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before ResponseHandler\"<\/span>)<\/span>\r\n\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\tdefer<\/span> log<\/span>.<\/span>Println<\/span>(<\/span>\"after ResponseHandler\"<\/span>)<\/span>\r\n\treturn<\/span> res<\/span>\r\n})<\/span>\r\nsrv<\/span>.<\/span>AroundRootFields<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>RootResolver<\/span>)<\/span> graphql<\/span>.<\/span>Marshaler<\/span> {<\/span>\r\n\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before RootResolver\"<\/span>)<\/span>\r\n\tres<\/span> :=<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\tdefer<\/span> func<\/span>()<\/span> {<\/span>\r\n\t\tvar<\/span> b<\/span> bytes<\/span>.<\/span>Buffer<\/span>\r\n\t\tres<\/span>.<\/span>MarshalGQL<\/span>(<\/span>&<\/span>b<\/span>)<\/span>\r\n\t\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"after RootResolver\"<\/span>,<\/span> b<\/span>.<\/span>String<\/span>())<\/span>\r\n\t}()<\/span>\r\n\treturn<\/span> res<\/span>\r\n})<\/span>\r\nsrv<\/span>.<\/span>AroundFields<\/span>(<\/span>func<\/span>(<\/span>ctx<\/span> context<\/span>.<\/span>Context<\/span>,<\/span> next<\/span> graphql<\/span>.<\/span>Resolver<\/span>)<\/span> (<\/span>res<\/span> interface<\/span>{},<\/span> err<\/span> error<\/span>)<\/span> {<\/span>\r\n\tlog<\/span>.<\/span>Println<\/span>(<\/span>\"before Resolver\"<\/span>)<\/span>\r\n\tres<\/span>,<\/span> err<\/span> =<\/span> next<\/span>(<\/span>ctx<\/span>)<\/span>\r\n\tdefer<\/span> log<\/span>.<\/span>Println<\/span>(<\/span>\"after Resolver\"<\/span>,<\/span> res<\/span>)<\/span>\r\n\treturn<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
                                                      2023\/12\/12 23:57:59 connect to http:\/\/localhost:8080\/ for GraphQL playground\r\n2023\/12\/12 23:58:02 before OperationHandler\r\n2023\/12\/12 23:58:02 after OperationHandler\r\n2023\/12\/12 23:58:02 before ResponseHandler\r\n2023\/12\/12 23:58:02 before RootResolver\r\n2023\/12\/12 23:58:02 before Resolver\r\n<\/span>2023\/12\/12 23:58:02 after Resolver {PJ_1 My Project http:\/\/example.com\/project\/1 1 <nil><\/span> 0xc000183830}<\/span>\r\n2023\/12\/12 23:58:02 before Resolver\r\n2023\/12\/12 23:58:02 after Resolver PJ_1\r\n2023\/12\/12 23:58:02 before Resolver\r\n2023\/12\/12 23:58:02 after Resolver My Project\r\n2023\/12\/12 23:58:02 before Resolver\r\n2023\/12\/12 23:58:02 after Resolver http:\/\/example.com\/project\/1\r\n2023\/12\/12 23:58:02 after RootResolver {\"id\":\"PJ_1\",\"title\":\"My Project\",\"url\":\"http:\/\/example.com\/project\/1\"}\r\n2023\/12\/12 23:58:02 after ResponseHandler\r\n<\/span><\/code><\/pre>\n
                                                      \u4ece\u8fd9\u91cc\u53ef\u4ee5\u770b\u51fa\uff0c\u6d41\u7a0b\u5982\u4e0b\u3002<\/p>\n
                                                        \n
                                                      1. \n
                                                          \u63a5\u6536\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42<\/ol>\n<\/li>\n<\/ol>\n
                                                          \u6267\u884cOperationMiddleware\u7684\u524d\u5904\u7406
                                                          \n\u521b\u5efaResponseHandler\u6765\u751f\u6210\u5ba2\u6237\u7aef\u770b\u5230\u7684\u5b8c\u6574\u54cd\u5e94\u6570\u636e\uff0c\u5305\u62ecdata\u3001errors\u548cextensions<\/p>\n
                                                          \u6267\u884cOperationMiddleware\u7684\u540e\u5904\u7406<\/p>\n
                                                          \u6267\u884cResponseMiddleware\u7684\u524d\u5904\u7406<\/p>\n
                                                          \u6267\u884cResponseHandler<\/p>\n
                                                          \u6267\u884cRootFieldMiddleware\u7684\u524d\u5904\u7406
                                                          \n\u8fd0\u884c\u6839\u89e3\u6790\u5668\uff0c\u83b7\u53d6\u8981\u653e\u5165\u54cd\u5e94\u7684data\u5b57\u6bb5\u7684\u6570\u636e<\/p>\n
                                                          \u6267\u884cFieldMiddleware\u7684\u524d\u5904\u7406
                                                          \n\u6536\u96c6\u54cd\u5e94\u6240\u9700\u7684\u6570\u636e\uff0c\u521b\u5efa\u54cd\u5e94\u5b57\u6bb5<\/p>\n
                                                          \u6267\u884cFieldMiddleware\u7684\u540e\u5904\u7406
                                                          \n\u76f4\u5230\u6240\u6709\u5fc5\u8981\u7684\u5b57\u6bb5\u90fd\u88ab\u521b\u5efa\u5b8c\u6bd5\uff0c\u56de\u5230\u6b65\u9aa41\u91cd\u590d\u6267\u884c<\/p>\n
                                                          \u6267\u884cRootFieldMiddleware\u7684\u540e\u5904\u7406
                                                          \n\u5c06\u6839\u89e3\u6790\u5668\u6536\u96c6\u5230\u7684\u6570\u636e\u8fdb\u884cJSON\u7f16\u7801\uff0c\u5b58\u50a8\u5728\u54cd\u5e94\u7684data\u5b57\u6bb5\u4e2d<\/p>\n
                                                          \u6267\u884cResponseMiddleware\u7684\u540e\u5904\u7406<\/p>\n
                                                          \u63a5\u4e0b\u6765\uff0c\u6211\u60f3\u8981\u4ecb\u7ecd\u201c\u901a\u8fc7\u6307\u4ee4\u6dfb\u52a0\u8ba4\u8bc1\u673a\u5236\u201d\u3002<\/p>\n
                                                          \u4eca\u5929\u5c31\u5230\u8fd9\u91cc\u3002
                                                          \n\u8c22\u8c22\u4f60\u3002
                                                          \n\u8bf7\u591a\u5173\u7167\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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