{"id":44561,"date":"2023-07-29T22:54:20","date_gmt":"2024-01-03T04:41:51","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8%e6%8b%a6%e6%88%aa%e5%99%a8%e6%9d%a5%e5%ae%9e%e7%8e%b0go-grpc%e7%9a%84%e8%ae%a4%e8%af%81%e5%92%8c%e6%8e%88%e6%9d%83\/"},"modified":"2024-04-30T15:59:27","modified_gmt":"2024-04-30T07:59:27","slug":"%e4%bd%bf%e7%94%a8%e6%8b%a6%e6%88%aa%e5%99%a8%e6%9d%a5%e5%ae%9e%e7%8e%b0go-grpc%e7%9a%84%e8%ae%a4%e8%af%81%e5%92%8c%e6%8e%88%e6%9d%83","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8%e6%8b%a6%e6%88%aa%e5%99%a8%e6%9d%a5%e5%ae%9e%e7%8e%b0go-grpc%e7%9a%84%e8%ae%a4%e8%af%81%e5%92%8c%e6%8e%88%e6%9d%83\/","title":{"rendered":"\u4f7f\u7528\u62e6\u622a\u5668\u6765\u5b9e\u73b0Go-gRPC\u7684\u8ba4\u8bc1\u548c\u6388\u6743"},"content":{"rendered":"<h1>\u7b80\u800c\u8a00\u4e4b<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3059\u3079\u3066\u306e RPC \u306b\u5171\u901a\u3059\u308b\u51e6\u7406\u306b\u306f gRPC Interceptor \u3092\u5229\u7528\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u8a8d\u8a3c Interceptor \u306f\u3059\u3079\u3066\u306e RPC \u3067\u540c\u3058\u51e6\u7406\u3092\u884c\u3063\u3066\u3001\u8a8d\u53ef Interceptor \u306f gRPC \u30b5\u30fc\u30d3\u30b9\u3054\u3068\u306b\u5225\u306e\u51e6\u7406\u3092\u884c\u3048\u308b\u3088\u3046\u306b\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u8a8d\u8a3c\u306b\u4f7f\u3046 Authorization \u5024\u306f Metadata \u3068\u3057\u3066\u9001\u4fe1\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u8907\u6570\u306e Interceptor \u3092\u307e\u3068\u3081\u3066\u66f8\u304f\u306b\u306f go-grpc-middleware \u306e chain \u3092\u4f7f\u3046<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3053\u3053\u3067\u306f\u7c21\u5358\u306e\u305f\u3081 Unary RPC \u3092\u524d\u63d0\u306b\u307e\u3068\u3081\u308b<\/ul>\n<h1>gRPC \u62e6\u622a\u5668<\/h1>\n<p>gRPC\u670d\u52a1\u5668\u53ef\u4ee5\u9009\u62e9\u4f20\u9012UnaryServerInterceptor\u7c7b\u578b\u4f5c\u4e3a\u9009\u9879\u3002UnaryServerInterceptor\u7c7b\u578b\u53ef\u4ee5\u5728\u6240\u6709RPC\u6267\u884c\u4e4b\u524d\u6216\u4e4b\u540e\u6dfb\u52a0\u5904\u7406\u7684\u94a9\u5b50\uff0c\u56e0\u6b64\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u6240\u8c13\u7684\u4e2d\u95f4\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ UnaryServerInterceptor provides a hook to intercept the execution of a unary RPC on the server. info<\/span>\r\n<span class=\"c\">\/\/ contains all the information of this RPC the interceptor can operate on. And handler is the wrapper<\/span>\r\n<span class=\"c\">\/\/ of the service method implementation. It is the responsibility of the interceptor to invoke handler<\/span>\r\n<span class=\"c\">\/\/ to complete the RPC.<\/span>\r\n<span class=\"k\">type<\/span> <span class=\"n\">UnaryServerInterceptor<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"n\">req<\/span> <span class=\"k\">interface<\/span><span class=\"p\">{},<\/span> <span class=\"n\">info<\/span> <span class=\"o\">*<\/span><span class=\"n\">UnaryServerInfo<\/span><span class=\"p\">,<\/span> <span class=\"n\">handler<\/span> <span class=\"n\">UnaryHandler<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">resp<\/span> <span class=\"k\">interface<\/span><span class=\"p\">{},<\/span> <span class=\"n\">err<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<h1>\u8a8d\u8b49\u6514\u622a\u5668<\/h1>\n<p>\u5728\u8ba4\u8bc1\u62e6\u622a\u5668\u4e2d\uff0c\u5e0c\u671b\u786e\u8ba4\u7528\u6237\u7684\u6388\u6743\u503c\u662f\u5426\u6b63\u786e\u3002\u4f5c\u4e3a\u6240\u6709RPC\u7684\u5171\u540c\u5904\u7406\u6765\u5b9e\u73b0\u3002\u7531\u4e8e\u6388\u6743\u503c\u5728\u6240\u6709RPC\u4e2d\u90fd\u662f\u5171\u540c\u7684\uff0c\u6240\u4ee5\u6700\u597d\u5c06\u5176\u4f5c\u4e3a\u5143\u6570\u636e\u8fdb\u884c\u4ea4\u6362\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">grpcauthentication<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"context\"<\/span>\r\n\r\n    <span class=\"s\">\"google.golang.org\/grpc\"<\/span>\r\n    <span class=\"s\">\"google.golang.org\/grpc\/codes\"<\/span>\r\n    <span class=\"s\">\"google.golang.org\/grpc\/status\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"c\">\/\/ DefaultAuthenticateFunc \u306f\u3059\u3079\u3066\u306e\u30b5\u30fc\u30d3\u30b9\u306b\u5171\u901a\u3059\u308b\u8a8d\u8a3c\u51e6\u7406\u3092\u884c\u3046\u95a2\u6570\u3092\u8868\u3059\u3002<\/span>\r\n<span class=\"k\">type<\/span> <span class=\"n\">DefaultAuthenticateFunc<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"c\">\/\/ UnaryServerInterceptor \u306f\u30ea\u30af\u30a8\u30b9\u30c8\u3054\u3068\u306e\u8a8d\u8a3c\u51e6\u7406\u3092\u884c\u3046\u3001unary \u30b5\u30fc\u30d0\u30fc\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30bf\u30fc\u3092\u8fd4\u3059\u3002<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"n\">UnaryServerInterceptor<\/span><span class=\"p\">(<\/span><span class=\"n\">authFunc<\/span> <span class=\"n\">DefaultAuthenticateFunc<\/span><span class=\"p\">)<\/span> <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInterceptor<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"n\">req<\/span> <span class=\"k\">interface<\/span><span class=\"p\">{},<\/span> <span class=\"n\">info<\/span> <span class=\"o\">*<\/span><span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInfo<\/span><span class=\"p\">,<\/span> <span class=\"n\">handler<\/span> <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryHandler<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"k\">interface<\/span><span class=\"p\">{},<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">newCtx<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">authFunc<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"no\">nil<\/span><span class=\"p\">,<\/span> <span class=\"n\">status<\/span><span class=\"o\">.<\/span><span class=\"n\">Error<\/span><span class=\"p\">(<\/span><span class=\"n\">codes<\/span><span class=\"o\">.<\/span><span class=\"n\">Unauthenticated<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"o\">.<\/span><span class=\"n\">Error<\/span><span class=\"p\">())<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">handler<\/span><span class=\"p\">(<\/span><span class=\"n\">newCtx<\/span><span class=\"p\">,<\/span> <span class=\"n\">req<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">meta<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"fmt\"<\/span>\r\n\r\n    <span class=\"s\">\"golang.org\/x\/net\/context\"<\/span>\r\n    <span class=\"s\">\"google.golang.org\/grpc\/metadata\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n\r\n<span class=\"k\">const<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"c\">\/\/ AuthorizationKey \u306f\u8a8d\u8a3c\u30c8\u30fc\u30af\u30f3\u306b\u5bfe\u5fdc\u3059\u308b\u30ad\u30fc\u3092\u8868\u3059<\/span>\r\n    <span class=\"n\">AuthorizationKey<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"authorization\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"c\">\/\/ Authorization \u306f gRPC \u30e1\u30bf\u30c7\u30fc\u30bf\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u30c8\u30fc\u30af\u30f3\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"n\">Authorization<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">fromMeta<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"n\">AuthorizationKey<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">fromMeta<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"n\">key<\/span> <span class=\"kt\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"kt\">string<\/span><span class=\"p\">,<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">md<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">metadata<\/span><span class=\"o\">.<\/span><span class=\"n\">FromIncomingContext<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">!<\/span><span class=\"n\">ok<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"s\">\"\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Errorf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"not found metadata\"<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"n\">vs<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">md<\/span><span class=\"p\">[<\/span><span class=\"n\">key<\/span><span class=\"p\">]<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"nb\">len<\/span><span class=\"p\">(<\/span><span class=\"n\">vs<\/span><span class=\"p\">)<\/span> <span class=\"o\">==<\/span> <span class=\"m\">0<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"s\">\"\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Errorf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"not found %s in metadata\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">key<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">vs<\/span><span class=\"p\">[<\/span><span class=\"m\">0<\/span><span class=\"p\">],<\/span> <span class=\"no\">nil<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"context\"<\/span>\r\n\r\n    <span class=\"s\">\"github.com\/path\/to\/meta\"<\/span>\r\n    <span class=\"s\">\"github.com\/path\/to\/interceptor\/grpcauthentication\"<\/span>\r\n\r\n    <span class=\"s\">\"google.golang.org\/grpc\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">defaultAuthentication<\/span><span class=\"p\">()<\/span> <span class=\"n\">grpcauthentication<\/span><span class=\"o\">.<\/span><span class=\"n\">AuthFunc<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">authorization<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">meta<\/span><span class=\"o\">.<\/span><span class=\"n\">Authorization<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"no\">nil<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span>\r\n        <span class=\"p\">}<\/span>\r\n\r\n        <span class=\"n\">err<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">verify<\/span><span class=\"p\">(<\/span><span class=\"n\">authorization<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"no\">nil<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span>\r\n        <span class=\"p\">}<\/span>\r\n\r\n        <span class=\"k\">return<\/span> <span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"no\">nil<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">grpcServer<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">NewServer<\/span><span class=\"p\">(<\/span>\r\n        <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryInterceptor<\/span><span class=\"p\">(<\/span><span class=\"n\">grpcauthentication<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInterceptor<\/span><span class=\"p\">(<\/span><span class=\"n\">defaultAuthentication<\/span><span class=\"p\">())),<\/span>\r\n    <span class=\"p\">)<\/span>\r\n<span class=\"o\">...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u627f\u8a8d\u62e6\u622a\u5668<\/h1>\n<p>\u5728Interceptor\u4e2d\uff0c\u6211\u5011\u5e0c\u671b\u5c0d\u6bcf\u500b\u670d\u52d9\u6216RPC\u6aa2\u67e5\u4f7f\u7528\u8005\u662f\u5426\u5177\u6709\u6b0a\u9650\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u4f7f\u7528\u8005\u670d\u52d9\u63d0\u4f9b\u7684RPC\uff0c\u6211\u5011\u53ea\u9700\u8981\u6aa2\u67e5\u670d\u52d9\u662f\u5426\u505c\u6b62\uff0c\u800c\u5c0d\u65bc\u7ba1\u7406\u54e1\u670d\u52d9\u63d0\u4f9b\u7684RPC\uff0c\u6211\u5011\u5247\u9700\u8981\u6aa2\u67e5\u662f\u5426\u5177\u6709\u7ba1\u7406\u54e1\u6b0a\u9650\u3002<\/p>\n<p>\u4e3a\u4e86\u4f7f\u6bcf\u4e2a\u670d\u52a1\u53ef\u4ee5\u8fdb\u884c\u6388\u6743\u5904\u7406\uff0c\u6bcf\u4e2a\u670d\u52a1\u90fd\u9700\u8981\u5b9e\u73b0ServiceAuthorize\u63a5\u53e3\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">grpcauthorization<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"context\"<\/span>\r\n\r\n    <span class=\"s\">\"google.golang.org\/grpc\"<\/span>\r\n    <span class=\"s\">\"google.golang.org\/grpc\/codes\"<\/span>\r\n    <span class=\"s\">\"google.golang.org\/grpc\/status\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"c\">\/\/ ServiceAuthorize \u306f\u30b5\u30fc\u30d3\u30b9\u3054\u3068\u306e\u8a8d\u53ef\u3092\u884c\u3046\u95a2\u6570\u3092\u5b9f\u88c5\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u8868\u3059\u3002<\/span>\r\n<span class=\"k\">type<\/span> <span class=\"n\">ServiceAuthorize<\/span> <span class=\"k\">interface<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">Authorize<\/span><span class=\"p\">(<\/span><span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"kt\">string<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ UnaryServerInterceptor \u306f\u30ea\u30af\u30a8\u30b9\u30c8\u3054\u3068\u306e\u8a8d\u53ef\u3092\u884c\u3046\u3001unary \u30b5\u30fc\u30d0\u30fc\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30bf\u30fc\u3092\u8fd4\u3059\u3002<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"n\">UnaryServerInterceptor<\/span><span class=\"p\">()<\/span> <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInterceptor<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">func<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"n\">req<\/span> <span class=\"k\">interface<\/span><span class=\"p\">{},<\/span> <span class=\"n\">info<\/span> <span class=\"o\">*<\/span><span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInfo<\/span><span class=\"p\">,<\/span> <span class=\"n\">handler<\/span> <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryHandler<\/span><span class=\"p\">)<\/span> <span class=\"p\">(<\/span><span class=\"k\">interface<\/span><span class=\"p\">{},<\/span> <span class=\"kt\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">var<\/span> <span class=\"n\">err<\/span> <span class=\"kt\">error<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">srv<\/span><span class=\"p\">,<\/span> <span class=\"n\">ok<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">info<\/span><span class=\"o\">.<\/span><span class=\"n\">Server<\/span><span class=\"o\">.<\/span><span class=\"p\">(<\/span><span class=\"n\">ServiceAuthorize<\/span><span class=\"p\">);<\/span> <span class=\"n\">ok<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"n\">err<\/span> <span class=\"o\">=<\/span> <span class=\"n\">srv<\/span><span class=\"o\">.<\/span><span class=\"n\">Authorize<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"n\">info<\/span><span class=\"o\">.<\/span><span class=\"n\">FullMethod<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"no\">nil<\/span><span class=\"p\">,<\/span> <span class=\"n\">fmt<\/span><span class=\"o\">.<\/span><span class=\"n\">Errorf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"each service should implement an authorization\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">err<\/span> <span class=\"o\">!=<\/span> <span class=\"no\">nil<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"no\">nil<\/span><span class=\"p\">,<\/span> <span class=\"n\">status<\/span><span class=\"o\">.<\/span><span class=\"n\">Error<\/span><span class=\"p\">(<\/span><span class=\"n\">codes<\/span><span class=\"o\">.<\/span><span class=\"n\">PermissionDenied<\/span><span class=\"p\">,<\/span> <span class=\"n\">err<\/span><span class=\"o\">.<\/span><span class=\"n\">Error<\/span><span class=\"p\">())<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">handler<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">,<\/span> <span class=\"n\">req<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">userservice<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"context\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"c\">\/\/ Authorize \u306f\u30e6\u30fc\u30b6\u30fc\u306e\u8a8d\u53ef\u3092\u884c\u3046\u3002<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"n\">UserService<\/span><span class=\"p\">)<\/span> <span class=\"n\">Authorize<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"n\">fullMethodName<\/span> <span class=\"kt\">string<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">switch<\/span> <span class=\"n\">fullMethodName<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ \u4ee5\u4e0b\u306e RPC \u30e1\u30bd\u30c3\u30c9\u306f\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u30e1\u30bd\u30c3\u30c9\u306a\u306e\u3067\u7121\u6761\u4ef6\u306b\u8a31\u53ef\u3059\u308b {<\/span>\r\n    <span class=\"k\">case<\/span>\r\n        <span class=\"s\">\"\/userpb.UserService\/ReportTrouble\"<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"no\">nil<\/span>\r\n    <span class=\"c\">\/\/ }<\/span>\r\n    <span class=\"k\">default<\/span><span class=\"o\">:<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">userAuthFunc<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">adminservice<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"context\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"c\">\/\/ Authorize \u306f\u30e6\u30fc\u30b6\u30fc\u306e\u8a8d\u53ef\u3092\u884c\u3046\u3002<\/span>\r\n<span class=\"k\">func<\/span> <span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"n\">AdminService<\/span><span class=\"p\">)<\/span> <span class=\"n\">Authorize<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span> <span class=\"n\">context<\/span><span class=\"o\">.<\/span><span class=\"n\">Context<\/span><span class=\"p\">,<\/span> <span class=\"n\">fullMethodName<\/span> <span class=\"kt\">string<\/span><span class=\"p\">)<\/span> <span class=\"kt\">error<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">adminAuthFunc<\/span><span class=\"p\">(<\/span><span class=\"n\">ctx<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">package<\/span> <span class=\"n\">main<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">(<\/span>\r\n    <span class=\"s\">\"context\"<\/span>\r\n\r\n    <span class=\"s\">\"github.com\/path\/to\/interceptor\/grpcauthorization\"<\/span>\r\n\r\n    <span class=\"s\">\"google.golang.org\/grpc\"<\/span>\r\n<span class=\"p\">)<\/span>\r\n\r\n<span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">grpcServer<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">NewServer<\/span><span class=\"p\">(<\/span>\r\n        <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryInterceptor<\/span><span class=\"p\">(<\/span><span class=\"n\">grpcauthorization<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInterceptor<\/span><span class=\"p\">()),<\/span>\r\n    <span class=\"p\">)<\/span>\r\n<span class=\"o\">...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u5c06\u591a\u4e2a\u62e6\u622a\u5668\u6574\u5408\u5728\u4e00\u8d77<\/h1>\n<p>\u5728 https:\/\/github.com\/grpc-ecosystem\/go-grpc-middleware \u8fd9\u4e2a\u5e93\u4e2d\uff0c\u6709\u8bb8\u591a\u62e6\u622a\u5668\u7684\u5b9e\u73b0\u6c47\u603b\u5728\u4e00\u8d77\u3002\u5176\u4e2d\u5305\u62ec\u4f7f\u7528 chain \u7684\u65b9\u5f0f\u6765\u7f16\u5199\u591a\u4e2a\u62e6\u622a\u5668\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">grpcServer<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">NewServer<\/span><span class=\"p\">(<\/span>\r\n    <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryInterceptor<\/span><span class=\"p\">(<\/span><span class=\"n\">grpc_middleware<\/span><span class=\"o\">.<\/span><span class=\"n\">ChainUnaryServer<\/span><span class=\"p\">(<\/span>\r\n        <span class=\"n\">grpcauthentication<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInterceptor<\/span><span class=\"p\">(<\/span><span class=\"n\">defaultAuthentication<\/span><span class=\"p\">()),<\/span>\r\n        <span class=\"n\">grpcauthorization<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInterceptor<\/span><span class=\"p\">(),<\/span>\r\n    <span class=\"p\">)),<\/span>\r\n<span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<h1>\u603b\u7ed3<\/h1>\n<p>\u5f53\u5c06gRPC\u670d\u52a1\u5668\u548c\u670d\u52a1\u5408\u5e76\u65f6\uff0c\u4ee3\u7801\u7684\u63cf\u8ff0\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">func<\/span> <span class=\"n\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">grpcServer<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">NewServer<\/span><span class=\"p\">(<\/span>\r\n        <span class=\"n\">grpc<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryInterceptor<\/span><span class=\"p\">(<\/span><span class=\"n\">grpc_middleware<\/span><span class=\"o\">.<\/span><span class=\"n\">ChainUnaryServer<\/span><span class=\"p\">(<\/span>\r\n            <span class=\"n\">grpcauthentication<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInterceptor<\/span><span class=\"p\">(<\/span><span class=\"n\">defaultAuthentication<\/span><span class=\"p\">()),<\/span>\r\n            <span class=\"n\">grpcauthorization<\/span><span class=\"o\">.<\/span><span class=\"n\">UnaryServerInterceptor<\/span><span class=\"p\">(),<\/span>\r\n        <span class=\"p\">)),<\/span>\r\n    <span class=\"p\">)<\/span>\r\n\r\n    <span class=\"n\">usersv<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">userservice<\/span><span class=\"o\">.<\/span><span class=\"n\">NewUserService<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">adminsv<\/span> <span class=\"o\">:=<\/span> <span class=\"n\">adminservice<\/span><span class=\"o\">.<\/span><span class=\"n\">NewAdminService<\/span><span class=\"p\">()<\/span>\r\n    <span class=\"n\">userpb<\/span><span class=\"o\">.<\/span><span class=\"n\">RegisterUserServiceServer<\/span><span class=\"p\">(<\/span><span class=\"n\">grpcServer<\/span><span class=\"p\">,<\/span> <span class=\"n\">usersv<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">adminpb<\/span><span class=\"o\">.<\/span><span class=\"n\">RegisterAdminServiceServer<\/span><span class=\"p\">(<\/span><span class=\"n\">grpcServer<\/span><span class=\"p\">,<\/span> <span class=\"n\">adminsv<\/span><span class=\"p\">)<\/span>\r\n<span class=\"o\">...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u800c\u8a00\u4e4b \u3059\u3079\u3066\u306e RPC \u306b\u5171\u901a\u3059\u308b\u51e6\u7406\u306b\u306f gRPC Interceptor \u3092\u5229\u7528\u3059\u308b &nbsp; \u8a8d [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44561","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4f7f\u7528\u62e6\u622a\u5668\u6765\u5b9e\u73b0Go-gRPC\u7684\u8ba4\u8bc1\u548c\u6388\u6743 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528\u62e6\u622a\u5668\u6765\u5b9e\u73b0go-grpc\u7684\u8ba4\u8bc1\u548c\u6388\u6743\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" 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