kratos http 原理

最新推荐文章于 2025-11-15 00:35:37 发布

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最新推荐文章于 2025-11-15 00:35:37 发布 · 771 阅读

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CC 4.0 BY-SA版权

文章标签：

#http #iphone #网络协议

概念

kratos 为了使http协议的逻辑代码和grpc的逻辑代码使用同一份，选择了基于protobuf的IDL文件使用proto插件生成辅助代码的方式。

protoc http插件的地址为：https://github.com/go-kratos/kratos/tree/main/cmd/protoc-gen-go-http

示例

syntax = "proto3";

package helloworld;

option go_package = "test/helloworld;helloworld";
option java_multiple_files = true;
option java_package = "helloworld";
import "google/api/annotations.proto";

service Greeter {
	rpc SayHello (HelloRequest) returns (HelloReply)  {
		  option (google.api.http) = {
			  post: "/helloworld", // 声明路由
			  body: "*"
		  };
	}
  }
  
message HelloRequest {
	string name = 1;
}
  
message HelloReply {
	string msg = 1;
}

使用kratos proto client xxx 生成的代码为：

// Code generated by protoc-gen-go-http. DO NOT EDIT.
// versions:
// - protoc-gen-go-http v2.4.0
// - protoc             v3.19.4
// source: helloworld/helloworld.proto

package helloworld

import (
	context "context"
	http "github.com/go-kratos/kratos/v2/transport/http"
	binding "github.com/go-kratos/kratos/v2/transport/http/binding"
)

// This is a compile-time assertion to ensure that this generated file
// is compatible with the kratos package it is being compiled against.
var _ = new(context.Context)
var _ = binding.EncodeURL

const _ = http.SupportPackageIsVersion1

const OperationGreeterSayHello = "/helloworld.Greeter/SayHello"

type GreeterHTTPServer interface {
   
   
	SayHello(context.Context, *HelloRequest) (*HelloReply, error)
}

func RegisterGreeterHTTPServer(s *http.Server, srv GreeterHTTPServer) {
   
   
	r := s.Route("/")
	r.POST("/helloworld", _Greeter_SayHello0_HTTP_Handler(srv))
}

func _Greeter_SayHello0_HTTP_Handler(srv GreeterHTTPServer) func(ctx http.Context) error {
   
   
	return func(ctx http.Context) error {
   
   
		var in HelloRequest
		if err := ctx.Bind(&in); err != nil {
   
   
			return err
		}
		http.SetOperation(ctx, OperationGreeterSayHello)
		h := ctx.Middleware(func(ctx context.Context, req interface{
   
   }) (interface{
   
   }, error) {
   
   
			return srv.SayHello(ctx, req.(*HelloRequest))
		})
		out, err := h(ctx, &in)
		if err != nil {
   
   
			return err
		}
		reply := out.(*HelloReply)
		return ctx.Result(200, reply)
	}
}

type GreeterHTTPClient interface {
   
   
	SayHello(ctx context.Context, req *HelloRequest, opts ...http.CallOption) (rsp *HelloReply, err error)
}

type GreeterHTTPClientImpl struct {
   
   
	cc *http.Client
}

func NewGreeterHTTPClient(client *http.Client) GreeterHTTPClient {
   
   
	return &GreeterHTTPClientImpl{
   
   client}
}

func (c *GreeterHTTPClientImpl) SayHello(ctx context.Context, in *HelloRequest, opts ...http.CallOption) (*HelloReply, error) {
   
   
	var out HelloReply
	pattern := "/helloworld"
	path := binding.EncodeURL(pattern, in, false)
	opts = append(opts, http.Operation(OperationGreeterSayHello))
	opts = append(opts, http.PathTemplate(pattern))
	err := c.cc.Invoke(ctx, "POST", path, in, &out, opts...)
	if err != nil {
   
   
		return nil, err
	}
	return &out, err
}