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ApiServer.go
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ApiServer.go
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package master
import (
"encoding/json"
"github.com/staryjie/crontab/common"
"net"
"net/http"
"strconv"
"time"
)
var (
// 单例对象
G_apiServer *ApiServer
)
// 任务的HTTP接口
type ApiServer struct {
httpServer *http.Server
}
// 保存任务接口
// POST job = {"name": "job1", "command": "echo hello", "cronExpr": "* * * * *"}
func handleJobSave(resp http.ResponseWriter, req *http.Request) {
var (
err error
postJob string
job common.Job
oldJob *common.Job
bytes []byte
)
// 任务保存到etcd中
// 1. 解析POST表单
if err = req.ParseForm(); err != nil {
// 解析表单失败
goto ERR
}
// 2.取表单中的job对象
postJob = req.PostForm.Get("job")
// 3.反序列化Job
if err = json.Unmarshal([]byte(postJob), &job); err != nil {
// 反序列化失败
goto ERR
}
// 4.保存到Etcd
if oldJob, err = G_jobMgr.SaveJob(&job); err != nil {
goto ERR
}
// 5.返回正常应答
if bytes, err = common.BuildResponse(0, "success", oldJob); err == nil { // 正常响应 err 应该为 nil
resp.Write(bytes)
}
return
ERR:
// 返回异常应答
if bytes, err = common.BuildResponse(-1, err.Error(), nil); err == nil {
resp.Write(bytes)
}
}
// 删除任务接口
// POST /job/delete name = job1
func handleJobDelete(resp http.ResponseWriter, req *http.Request) {
var (
name string
err error
oldJob *common.Job
bytes []byte
)
// 解析Form表单
if err = req.ParseForm(); err != nil {
goto ERR
}
// 获取到要删除的任务名称
name = req.PostForm.Get("name")
// 通过任务名去删除任务
if oldJob, err = G_jobMgr.DeleteJob(name); err != nil {
goto ERR
}
// 正常删除的应答
if bytes, err = common.BuildResponse(0, "success", oldJob); err == nil {
resp.Write(bytes)
}
return
ERR:
if bytes, err = common.BuildResponse(-1, err.Error(), nil); err == nil {
resp.Write(bytes)
}
}
// 获取所有任务的列表
func handleJobList(resp http.ResponseWriter, req *http.Request) {
var (
jobList []*common.Job
bytes []byte
err error
)
// 获取任务列表
if jobList, err = G_jobMgr.ListJobs(); err != nil {
goto ERR
}
// 正常应答
if bytes, err = common.BuildResponse(0, "success", jobList); err == nil {
resp.Write(bytes)
}
return
ERR:
if bytes, err = common.BuildResponse(-1, err.Error(), nil); err == nil {
resp.Write(bytes)
}
}
// 强杀任务
func handleJobKill(resp http.ResponseWriter, req *http.Request) {
var (
name string
bytes []byte
err error
)
// 解析POST表单
if err = req.ParseForm(); err != nil {
goto ERR
}
// 获取要杀死的任务
name = req.PostForm.Get("name")
// 杀死任务
if err = G_jobMgr.KillJob(name); err != nil {
goto ERR
}
// 正常响应
if bytes, err = common.BuildResponse(0, "success", nil); err == nil {
resp.Write(bytes)
}
return
ERR:
if bytes, err = common.BuildResponse(-1, err.Error(), nil); err == nil {
resp.Write(bytes)
}
}
// 日志查询
func handleJobLog(resp http.ResponseWriter, req *http.Request) {
var (
err error
name string // 任务名字
skipParam string // 从第几条开始
limitParam string // 返回多少条
skip int
limit int
logArr []*common.JobLog
bytes []byte
)
// 解析GET参数
if err = req.ParseForm(); err != nil {
goto ERR
}
// 获取请求参数 /job/log?name=job10&skip=0&limit=10
name = req.Form.Get("name")
skipParam = req.Form.Get("skip")
limitParam = req.Form.Get("limit")
if skip, err = strconv.Atoi(skipParam); err != nil {
skip = common.LOG_SKIP_NUM
}
if limit, err = strconv.Atoi(limitParam); err != nil {
limit = common.LOG_LIMIT_NUM
}
if logArr, err = G_logMgr.ListLog(name, skip, limit); err != nil {
goto ERR
}
// 正常应答
if bytes, err = common.BuildResponse(0, "success", logArr); err == nil {
resp.Write(bytes)
}
return
ERR:
if bytes, err = common.BuildResponse(-1, err.Error(), nil); err == nil {
resp.Write(bytes)
}
}
// 健康节点
func handleWorkerList(resp http.ResponseWriter, req *http.Request) {
var (
workerArr []string
err error
bytes []byte
)
if workerArr, err = G_workerMgr.ListWorkers(); err != nil {
goto ERR
}
// 正常应答
if bytes, err = common.BuildResponse(0, "success", workerArr); err == nil {
resp.Write(bytes)
}
return
ERR:
if bytes, err = common.BuildResponse(-1, err.Error(), nil); err == nil {
resp.Write(bytes)
}
}
// 初始化服务
func InitApiServer() (err error) {
var (
mux *http.ServeMux
listener net.Listener
httpServer *http.Server
staticDir http.Dir // 静态文件根目录
staticHandler http.Handler // 静态文件HTTP回调
)
// 初始化路由
mux = http.NewServeMux()
mux.HandleFunc("/job/save", handleJobSave) // 保存任务
mux.HandleFunc("/job/delete", handleJobDelete) // 删除任务
mux.HandleFunc("/job/list", handleJobList) // 获取所有任务
mux.HandleFunc("/job/kill", handleJobKill) // 强杀任务
mux.HandleFunc("/job/log", handleJobLog) // 日持查询
mux.HandleFunc("/worker/list", handleWorkerList) // 健康节点
// http支持静态文件路由
staticDir = http.Dir(G_config.WebRoot)
staticHandler = http.FileServer(staticDir)
mux.Handle("/", http.StripPrefix("/", staticHandler))
// 启动HTTP监听
if listener, err = net.Listen("tcp", ":"+strconv.Itoa(G_config.ApiPort)); err != nil {
return
}
// 创建一个HTTP服务
httpServer = &http.Server{
ReadTimeout: time.Duration(G_config.ApiReadTimeout) * time.Millisecond,
WriteTimeout: time.Duration(G_config.ApiWriteTimeout) * time.Millisecond,
Handler: mux,
}
// 给单例赋值
G_apiServer = &ApiServer{
httpServer: httpServer,
}
// 协程启动服务端
go httpServer.Serve(listener)
return
}