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HTTPAPI.go
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HTTPAPI.go
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package switcherapiserver
import (
"crypto/subtle"
"encoding/json"
"io/ioutil"
"net/http"
"strings"
"time"
initusercoin "github.com/btccom/btcpool-go-modules/userChainAPIServer/initUserCoin"
"github.com/golang/glog"
"github.com/samuel/go-zookeeper/zk"
)
// SwitchUserCoins 欲切换的用户和币种
type SwitchUserCoins struct {
Coin string `json:"coin"`
PUNames []string `json:"punames"`
}
// SwitchMultiUserRequest 多用户切换请求数据结构
type SwitchMultiUserRequest struct {
UserCoins []SwitchUserCoins `json:"usercoins"`
}
// APIResponse API响应数据结构
type APIResponse struct {
ErrNo int `json:"err_no"`
ErrMsg string `json:"err_msg"`
Success bool `json:"success"`
}
// SubPoolUpdate 子池更新信息
type SubPoolUpdate struct {
Coin string `json:"coin"`
SubPoolName string `json:"subpool_name"`
CoinbaseInfo string `json:"coinbase_info"`
PayoutAddr string `json:"payout_addr"`
}
// SubPoolCoinbase 子池Coinbase信息
type SubPoolCoinbase struct {
Success bool `json:"success"`
ErrNo int `json:"err_no"`
ErrMsg string `json:"err_msg"`
SubPoolName string `json:"subpool_name"`
Old struct {
CoinbaseInfo string `json:"coinbase_info"`
PayoutAddr string `json:"payout_addr"`
} `json:"old"`
}
// SubPoolUpdateAck 子池更新响应
type SubPoolUpdateAck struct {
SubPoolCoinbase
New struct {
CoinbaseInfo string `json:"coinbase_info"`
PayoutAddr string `json:"payout_addr"`
} `json:"new"`
}
// SubPoolUpdateAckInner 子池更新响应(非公开)
type SubPoolUpdateAckInner struct {
SubPoolUpdateAck
Host struct {
HostName string `json:"hostname"`
} `json:"host"`
}
// HTTPRequestHandle HTTP请求处理函数
type HTTPRequestHandle func(http.ResponseWriter, *http.Request)
// 启动 API Server
func runAPIServer() {
defer waitGroup.Done()
// HTTP监听
glog.Info("Listen HTTP ", configData.ListenAddr)
http.HandleFunc("/switch", basicAuth(switchHandle))
http.HandleFunc("/switch/multi-user", basicAuth(switchMultiUserHandle))
http.HandleFunc("/switch-multi-user", basicAuth(switchMultiUserHandle))
http.HandleFunc("/subpool/get-coinbase", basicAuth(getCoinbaseHandle))
http.HandleFunc("/subpool-get-coinbase", basicAuth(getCoinbaseHandle))
http.HandleFunc("/subpool/update-coinbase", basicAuth(updateCoinbaseHandle))
http.HandleFunc("/subpool-update-coinbase", basicAuth(updateCoinbaseHandle))
// The listener will be done in initUserCoin/HTTPAPI.go
/*err := http.ListenAndServe(configData.ListenAddr, nil)
if err != nil {
glog.Fatal("HTTP Listen Failed: ", err)
return
}*/
}
// basicAuth 执行Basic认证
func basicAuth(f HTTPRequestHandle) HTTPRequestHandle {
return func(w http.ResponseWriter, r *http.Request) {
apiUser := []byte(configData.APIUser)
apiPasswd := []byte(configData.APIPassword)
user, passwd, ok := r.BasicAuth()
// 检查用户名密码是否正确
if ok && subtle.ConstantTimeCompare(apiUser, []byte(user)) == 1 && subtle.ConstantTimeCompare(apiPasswd, []byte(passwd)) == 1 {
// 执行被装饰的函数
f(w, r)
return
}
// 认证失败,提示 401 Unauthorized
// Restricted 可以改成其他的值
w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
// 401 状态码
w.WriteHeader(http.StatusUnauthorized)
// 401 页面
w.Write([]byte(`<h1>401 - Unauthorized</h1>`))
}
}
// getCoinbaseHandle 获取子池coinbase信息
func getCoinbaseHandle(w http.ResponseWriter, req *http.Request) {
if len(configData.ZKSubPoolUpdateBaseDir) == 0 {
writeError(w, 403, "API disabled")
return
}
requestJSON, err := ioutil.ReadAll(req.Body)
if err != nil {
glog.Warning(err, ": ", req.RequestURI)
writeError(w, 500, err.Error())
return
}
var reqData SubPoolUpdate
err = json.Unmarshal(requestJSON, &reqData)
if err != nil {
glog.Info(err, ": ", req.RequestURI)
writeError(w, 400, "wrong JSON, "+err.Error())
return
}
if len(reqData.Coin) < 1 {
writeError(w, 400, "coin cannot be empty")
return
}
if len(reqData.SubPoolName) < 1 {
writeError(w, 400, "subpool_name cannot be empty")
return
}
glog.Info("[subpool-get] Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
reqNode := configData.ZKSubPoolUpdateBaseDir + reqData.Coin + "/" + reqData.SubPoolName
ackNode := reqNode + "/ack"
reqByte, stat, err := zookeeperConn.Get(reqNode)
if err != nil {
glog.Warning("[subpool-get] zk path '", reqNode, "' doesn't exists",
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 404, "subpool '"+reqData.SubPoolName+"' does not exist")
return
}
exists, _, ack, err := zookeeperConn.ExistsW(ackNode)
if err != nil || !exists {
glog.Warning("[subpool-get] zk path '", ackNode, "' doesn't exists",
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 503, "jobmaker cannot ACK the request")
return
}
_, err = zookeeperConn.Set(reqNode, reqByte, stat.Version)
if err != nil {
glog.Warning("[subpool-get] data has been updated at query time! ", err.Error(),
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 500, "data has been updated at query time")
return
}
select {
case <-ack:
ackJSON, _, err := zookeeperConn.Get(ackNode)
if err != nil {
glog.Warning("[subpool-get] get ACK failed, ", err.Error(),
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 500, "cannot get ACK from zookeeper")
return
}
var ackData SubPoolUpdateAckInner
err = json.Unmarshal(ackJSON, &ackData)
if err != nil {
glog.Warning("[subpool-get] parse ACK failed, ", err.Error(),
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 500, "cannot parse ACK in zookeeper")
return
}
if !ackData.Success && ackData.ErrMsg == "empty request" {
ackData.Success = true
ackData.ErrMsg = "success"
}
glog.Info("[subpool-get] Response: ", ackData.ErrMsg, ", Host: ", ackData.Host.HostName,
", Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName,
", Old: ", ackData.Old)
ackByte, _ := json.Marshal(ackData.SubPoolCoinbase)
w.Write(ackByte)
return
case <-time.After(time.Duration(configData.ZKSubPoolUpdateAckTimeout) * time.Second):
glog.Warning("[subpool-get] ", "timeout when waiting ACK!",
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 504, "timeout when waiting ACK")
return
}
}
// updateCoinbaseHandle 更新子池coinbase信息
func updateCoinbaseHandle(w http.ResponseWriter, req *http.Request) {
if len(configData.ZKSubPoolUpdateBaseDir) == 0 {
writeError(w, 403, "API disabled")
return
}
requestJSON, err := ioutil.ReadAll(req.Body)
if err != nil {
glog.Warning(err, ": ", req.RequestURI)
writeError(w, 500, err.Error())
return
}
var reqData SubPoolUpdate
err = json.Unmarshal(requestJSON, &reqData)
if err != nil {
glog.Info(err, ": ", req.RequestURI)
writeError(w, 400, "wrong JSON, "+err.Error())
return
}
if len(reqData.Coin) < 1 {
writeError(w, 400, "coin cannot be empty")
return
}
if len(reqData.SubPoolName) < 1 {
writeError(w, 400, "subpool_name cannot be empty")
return
}
if len(reqData.PayoutAddr) < 1 {
writeError(w, 400, "payout_addr cannot be empty")
return
}
glog.Info("[subpool-update] Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName,
", CoinbaseInfo: ", reqData.CoinbaseInfo, ", PayoutAddr: ", reqData.PayoutAddr)
reqNode := configData.ZKSubPoolUpdateBaseDir + reqData.Coin + "/" + reqData.SubPoolName
ackNode := reqNode + "/ack"
exists, _, err := zookeeperConn.Exists(reqNode)
if err != nil || !exists {
glog.Warning("[subpool-update] zk path '", reqNode, "' doesn't exists",
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 404, "subpool '"+reqData.SubPoolName+"' does not exist")
return
}
exists, _, ack, err := zookeeperConn.ExistsW(ackNode)
if err != nil || !exists {
glog.Warning("[subpool-update] zk path '", ackNode, "' doesn't exists",
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 503, "jobmaker cannot ACK the request")
return
}
reqByte, _ := json.Marshal(reqData)
_, err = zookeeperConn.Set(reqNode, reqByte, -1)
if err != nil {
glog.Warning("[subpool-update] set zk path '", reqNode, "' failed! ", err.Error(),
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 500, "write data node failed")
return
}
select {
case <-ack:
ackJSON, _, err := zookeeperConn.Get(ackNode)
if err != nil {
glog.Warning("[subpool-update] get ACK failed, ", err.Error(),
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 500, "cannot get ACK from zookeeper")
return
}
var ackData SubPoolUpdateAckInner
err = json.Unmarshal(ackJSON, &ackData)
if err != nil {
glog.Warning("[subpool-update] parse ACK failed, ", err.Error(),
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 500, "cannot parse ACK in zookeeper")
return
}
if !ackData.Success && ackData.ErrNo == 0 {
ackData.ErrNo = 500
}
glog.Info("[subpool-update] Response: ", ackData.ErrMsg, ", Host: ", ackData.Host.HostName,
", Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName,
", Old: ", ackData.Old, ", New: ", ackData.New)
ackByte, _ := json.Marshal(ackData.SubPoolUpdateAck)
w.Write(ackByte)
return
case <-time.After(time.Duration(configData.ZKSubPoolUpdateAckTimeout) * time.Second):
glog.Warning("[subpool-update] ", "timeout when waiting ACK!",
" Coin: ", reqData.Coin, ", SubPool: ", reqData.SubPoolName)
writeError(w, 504, "timeout when waiting ACK")
return
}
}
// switchHandle 处理币种切换请求
func switchHandle(w http.ResponseWriter, req *http.Request) {
puname := req.FormValue("puname")
coin := req.FormValue("coin")
oldCoin, err := changeMiningCoin(puname, coin)
if err != nil {
glog.Info(err, ": ", req.RequestURI)
writeError(w, err.ErrNo, err.ErrMsg)
return
}
glog.Info("[single-switch] ", puname, ": ", oldCoin, " -> ", coin)
writeSuccess(w)
}
// switchMultiUserHandle 处理多用户币种切换请求
func switchMultiUserHandle(w http.ResponseWriter, req *http.Request) {
var reqData SwitchMultiUserRequest
requestJSON, err := ioutil.ReadAll(req.Body)
if err != nil {
glog.Warning(err, ": ", req.RequestURI)
writeError(w, 500, err.Error())
return
}
err = json.Unmarshal(requestJSON, &reqData)
if err != nil {
glog.Info(err, ": ", req.RequestURI)
writeError(w, 400, err.Error())
return
}
if len(reqData.UserCoins) == 0 {
glog.Info(APIErrUserCoinsEmpty.ErrMsg, ": ", req.RequestURI)
writeError(w, APIErrUserCoinsEmpty.ErrNo, APIErrUserCoinsEmpty.ErrMsg)
return
}
for _, usercoin := range reqData.UserCoins {
coin := usercoin.Coin
for _, puname := range usercoin.PUNames {
oldCoin, err := changeMiningCoin(puname, coin)
if err != nil {
glog.Info(err, ": ", req.RequestURI, " {puname=", puname, ", coin=", coin, "}")
writeError(w, err.ErrNo, err.ErrMsg)
return
}
glog.Info("[multi-switch] ", puname, ": ", oldCoin, " -> ", coin)
}
}
writeSuccess(w)
}
func writeSuccess(w http.ResponseWriter) {
response := APIResponse{0, "", true}
responseJSON, _ := json.Marshal(response)
w.Write(responseJSON)
}
func writeError(w http.ResponseWriter, errNo int, errMsg string) {
response := APIResponse{errNo, errMsg, false}
responseJSON, _ := json.Marshal(response)
w.Write(responseJSON)
}
func changeMiningCoin(puname string, coin string) (oldCoin string, apiErr *APIError) {
oldCoin = ""
if len(puname) < 1 {
apiErr = APIErrPunameIsEmpty
return
}
if strings.Contains(puname, "/") {
apiErr = APIErrPunameInvalid
return
}
if len(coin) < 1 {
apiErr = APIErrCoinIsEmpty
return
}
// 检查币种是否存在
exists := false
for _, availableCoin := range configData.AvailableCoins {
if availableCoin == coin {
exists = true
break
}
}
if !exists {
apiErr = APIErrCoinIsInexistent
return
}
if configData.StratumServerCaseInsensitive {
// stratum server对子账户名大小写不敏感
// 简单的将子账户名转换为小写即可
puname = strings.ToLower(puname)
}
// stratumSwitcher 监控的键
zkPath := configData.ZKSwitcherWatchDir + puname
// 看看键是否存在
exists, _, err := zookeeperConn.Exists(zkPath)
if err != nil {
glog.Error("zk.Exists(", zkPath, ") Failed: ", err)
apiErr = APIErrReadRecordFailed
return
}
if exists {
// 读取zookeeper看看原来的值是多少
oldCoinData, _, err := zookeeperConn.Get(zkPath)
if err != nil {
glog.Error("zk.Get(", zkPath, ") Failed: ", err)
apiErr = APIErrReadRecordFailed
return
}
oldCoin = string(oldCoinData)
// 没有改变
// 没有改变不再返回错误,这样一来,如果stratumSwitcher错过了前一个切换消息,可以再收到一次切换消息以完成切换
// 在stratumSwitcher那里,如果币种确实没有发生改变,切换就不会发生
/*if oldCoin == coin {
apiErr = APIErrCoinNoChange
return
}*/
// 查看子账户名的更新时间。如果子账户名刚刚创建,则延后15秒写入
userUpdateTime := initusercoin.GetUserUpdateTime(puname, coin)
safetyPeriod := initusercoin.GetSafetyPeriod()
nowTime := time.Now().Unix()
if userUpdateTime != 0 && nowTime-userUpdateTime >= safetyPeriod {
// 写入新值
_, err = zookeeperConn.Set(zkPath, []byte(coin), -1)
if err != nil {
glog.Error("zk.Set(", zkPath, ",", coin, ") Failed: ", err)
apiErr = APIErrWriteRecordFailed
return
}
} else {
if userUpdateTime <= 0 {
userUpdateTime = nowTime
}
sleepTime := safetyPeriod - (nowTime - userUpdateTime)
glog.Info("Too new puname ", puname, ", delay ", sleepTime, "s")
go func() {
time.Sleep(time.Duration(sleepTime) * time.Second)
// 写入新值
_, err = zookeeperConn.Set(zkPath, []byte(coin), -1)
if err != nil {
glog.Error("zk.Set(", zkPath, ",", coin, ") Failed: ", err)
}
}()
}
} else {
// 不存在,直接创建
_, err = zookeeperConn.Create(zkPath, []byte(coin), 0, zk.WorldACL(zk.PermAll))
if err != nil {
glog.Error("zk.Create(", zkPath, ",", coin, ") Failed: ", err)
apiErr = APIErrWriteRecordFailed
return
}
}
apiErr = nil
return
}