/主节点广播后建立字节点的广播
package main
import (
"os"
"fmt"
"net/http"
"io"
)
type nodeINfo struct {
// 节点名称
id string
//节点路径
path string
// http 相应
write http.ResponseWriter
}
// 创建map,存储各个国家的ip地址
var nodeTable = make(map[string]string)
func main() {
// 接收终端参数
userId := os.Args[1]
fmt.Println(userId)
// 存储四个国家的ip地址
nodeTable = map[string]string{
"Apple" :"localhost:1111",
"MS" :"localhost:1112",
"Google" :"localhost:1113",
"IBM" :"localhost:1114",
}
// 创建国家对象
node := nodeINfo{id:userId,path:nodeTable[userId]}
// http协议的回掉函数
// http://localhost:1111/req?warTime =1111
http.HandleFunc("/req",node.request)
http.HandleFunc("/prePrepare",node.prePrepare)
http.HandleFunc("/prepare",node.prepare)
http.HandleFunc("/commit",node.commit)
if err:=http.ListenAndServe(node.path,nil);err!=nil {
fmt.Println(err)
}
}
// http服务器,接收到网络请求并且。req则回掉request
func (node *nodeINfo)request(writer http.ResponseWriter,request *http.Request) {
// 该命令允许request请求参数
request.ParseForm()
if (len(request.Form["warTime"])>0) {
node.write =writer
fmt.Println("主节点接收到的参数信息为",request.Form["warTime"][0])
// 激活主节点后向其他的节点发送广播
node.broadcast(request.Form["warTime"][0],"/prePrepare")
}
}
// 节点发送广播的方法
func (node *nodeINfo)broadcast(msg string,path string) {
fmt.Println("广播",path)
// 遍历所有的节点
for nodeId,url :=range nodeTable {
if nodeId== node.id{
continue
}
// 使当前节点外的节点作出相应
http.Get("http://"+url+path+"?warTime="+msg+"&nodeId="+node.id)
}
}
//处理广播后接收到的数据
func (node *nodeINfo)prePrepare(writer http.ResponseWriter,request *http.Request) {
request.ParseForm()
fmt.Println("接收到的广播为",request.Form["warTime"][0])
if len(request.Form["warTime"])>0 {
node.broadcast(request.Form["warTime"][0],"/prepare")
}
}
//接收子节点的广播
func (node *nodeINfo)prepare(writer http.ResponseWriter,request *http.Request){
request.ParseForm()
//打印
fmt.Println("接收到子节点的广播",request.Form["warTime"][0])
//校验
if len(request.Form["warTime"])>0 {
node.authentication(request)
}
}
var authenticationNOdeMap =make(map[string]string)
var authenticationSuceess =false
// 校验拜占庭
func (node *nodeINfo)authentication(request *http.Request ) {
if !authenticationSuceess {
if len(request.Form["nodeId"])>0 {
authenticationNOdeMap[request.Form["nodeId"][0]]="OK"
// 如果由两个国家节点成功正确返回了结果,则成功
if len(authenticationNOdeMap)>len(nodeTable)/3 {
authenticationSuceess = true
node.broadcast(request.Form["warTime"][0],"/commit")
}
}
}
}
// 返回成功相应
func(node *nodeINfo)commit(writer http.ResponseWriter,request *http.Request) {
if writer !=nil {
fmt.Println("拜占庭校验成功哈哈哈哈哈哈哈")
io.WriteString(node.write,"ok")
}
}
/*运行起来主节点,一次运行子节点,然后运行网页端的http://localhost:1111/req?warTime=1111
然后看图
*/,
主节点广播的图:

字节点1:

字节点2:
[图片上传中...(image.png-5b30e8-1527060651051-0)]
字节点3

这样一个字节点的广播服务算是成功了
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