Hertz 学习笔记（17）

今天学在服务端进行反向代理

在 hertz server 中使用反向代理的示例

这套例子会用到社区贡献的 reverseproxy 包，所以有哪里不清楚也可以去看看这里。

基础示例

/*
 * Copyright 2022 CloudWeGo Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package main

import (
	"context"

	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	"github.com/cloudwego/hertz/pkg/common/utils"
	"github.com/hertz-contrib/reverseproxy"
)

func main() {
	h := server.Default(server.WithHostPorts("127.0.0.1:8000"))
	proxy, err := reverseproxy.NewSingleHostReverseProxy("http://127.0.0.1:8000/proxy")
	if err != nil {
		panic(err)
	}
	h.GET("/proxy/backend", func(cc context.Context, c *app.RequestContext) {
		if param := c.Query("who"); param != "" {
			c.JSON(200, utils.H{
				"who": param,
				"msg": "proxy success!!",
			})
		} else {
			c.JSON(200, utils.H{
				"msg": "proxy success!!",
			})
		}
	})
	h.GET("/backend", proxy.ServeHTTP)
	h.Spin()
}

这里的反向代理是将客户端的请求里面的 who 字段挑出来分别处理了，就是一个最最基础符合定义的例子，没什么好讲的了。运行也是单文件运行，然后访问对应的地址即可。