今天小编给大家分享一下Go gRPC服务proto数据验证怎么实现的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
创建proto文件，添加验证规则
这里使用第三方插件go-proto-validators自动生成验证规则。
go get github.com/mwitkow/go-proto-validators新建simple.proto文件
syntax = "proto3";package proto;import "github.com/mwitkow/go-proto-validators/validator.proto";message InnerMessage { // some_integer can only be in range (1, 100). int32 some_integer = 1 [(validator.field) = {int_gt: 0, int_lt: 100}]; // some_float can only be in range (0;1). double some_float = 2 [(validator.field) = {float_gte: 0, float_lte: 1}];}message OuterMessage { // important_string must be a lowercase alpha-numeric of 5 to 30 characters (RE2 syntax). string important_string = 1 [(validator.field) = {regex: "^[a-z]{2,5}$"}]; // proto3 doesn't have `required`, the `msg_exist` enforces presence of InnerMessage. InnerMessage inner = 2 [(validator.field) = {msg_exists : true}];}service Simple{ rpc Route (InnerMessage) returns (OuterMessage){};}代码import "github.com/mwitkow/go-proto-validators/validator.proto"，文件validator.proto需要import "google/protobuf/descriptor.proto";包，不然会报错。
把src文件夹中的protobuf目录下载到GOPATH目录下。
编译simple.proto文件
go get github.com/mwitkow/go-proto-validators/protoc-gen-govalidators指令编译：
protoc --govalidators_out=. --go_out=plugins=grpc:./ ./simple.proto或者使用VSCode-proto3插件，第一篇有介绍。只需要添加"--govalidators_out=."即可。
// vscode-proto3插件配置 "protoc": { // protoc.exe所在目录 "path": "C:\\Go\\bin\\protoc.exe", // 保存时自动编译 "compile_on_save": true, "options": [ // go编译输出指令 "--go_out=plugins=grpc:.", "--govalidators_out=." ] },编译完成后，自动生成simple.pb.go和simple.validator.pb.go文件，simple.pb.go文件不再介绍，我们看下simple.validator.pb.go文件。
// Code generated by protoc-gen-gogo. DO NOT EDIT.// source: go-grpc-example/9-grpc_proto_validators/proto/simple.protopackage protoimport (fmt "fmt"math "math"proto "github.com/golang/protobuf/proto"_ "github.com/mwitkow/go-proto-validators"regexp "regexp"github_com_mwitkow_go_proto_validators "github.com/mwitkow/go-proto-validators")// Reference imports to suppress errors if they are not otherwise used.var _ = proto.Marshalvar _ = fmt.Errorfvar _ = math.Inffunc (this *InnerMessage) Validate() error {if !(this.SomeInteger > 0) {return github_com_mwitkow_go_proto_validators.FieldError("SomeInteger", fmt.Errorf(`value '%v' must be greater than '0'`, this.SomeInteger))}if !(this.SomeInteger < 100) {return github_com_mwitkow_go_proto_validators.FieldError("SomeInteger", fmt.Errorf(`value '%v' must be less than '100'`, this.SomeInteger))}if !(this.SomeFloat >= 0) {return github_com_mwitkow_go_proto_validators.FieldError("SomeFloat", fmt.Errorf(`value '%v' must be greater than or equal to '0'`, this.SomeFloat))}if !(this.SomeFloat <= 1) {return github_com_mwitkow_go_proto_validators.FieldError("SomeFloat", fmt.Errorf(`value '%v' must be lower than or equal to '1'`, this.SomeFloat))}return nil}var _regex_OuterMessage_ImportantString = regexp.MustCompile(`^[a-z]{2,5}$`)func (this *OuterMessage) Validate() error {if !_regex_OuterMessage_ImportantString.MatchString(this.ImportantString) {return github_com_mwitkow_go_proto_validators.FieldError("ImportantString", fmt.Errorf(`value '%v' must be a string conforming to regex "^[a-z]{2,5}$"`, this.ImportantString))}if nil == this.Inner {return github_com_mwitkow_go_proto_validators.FieldError("Inner", fmt.Errorf("message must exist"))}if this.Inner != nil {if err := github_com_mwitkow_go_proto_validators.CallValidatorIfExists(this.Inner); err != nil {return github_com_mwitkow_go_proto_validators.FieldError("Inner", err)}}return nil}里面自动生成了message中属性的验证规则。
把grpc_validator验证拦截器添加到服务端
grpcServer := grpc.NewServer(cred.TLSInterceptor(),grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(grpc_validator.StreamServerInterceptor(), grpc_auth.StreamServerInterceptor(auth.AuthInterceptor),grpc_zap.StreamServerInterceptor(zap.ZapInterceptor()),grpc_recovery.StreamServerInterceptor(recovery.RecoveryInterceptor()),)),grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer( grpc_validator.UnaryServerInterceptor(), grpc_auth.UnaryServerInterceptor(auth.AuthInterceptor),grpc_zap.UnaryServerInterceptor(zap.ZapInterceptor()), grpc_recovery.UnaryServerInterceptor(recovery.RecoveryInterceptor()),)),)运行后，当输入数据验证失败后，会有以下错误返回
Call Route err: rpc error: code = InvalidArgument desc = invalid field SomeInteger: value '101' must be less than '100'
其他类型验证规则设置
enum验证
syntax = "proto3";package proto;import "github.com/mwitkow/go-proto-validators/validator.proto";message SomeMsg { Action do = 1 [(validator.field) = {is_in_enum : true}];}enum Action { ALLOW = 0; DENY = 1; CHILL = 2;}UUID验证
syntax = "proto3";package proto;import "github.com/mwitkow/go-proto-validators/validator.proto";message UUIDMsg { // user_id must be a valid version 4 UUID. string user_id = 1 [(validator.field) = {uuid_ver: 4, string_not_empty: true}];}以上就是“Go gRPC服务proto数据验证怎么实现”这篇文章的所有内容，感谢各位的阅读！相信大家阅读完这篇文章都有很大的收获，小编每天都会为大家更新不同的知识，如果还想学习更多的知识，请关注编程网行业资讯频道。
