frp/server/proxy/http.go

180 lines
5.0 KiB
Go

// Copyright 2019 fatedier, fatedier@gmail.com
//
// 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 proxy
import (
"io"
"net"
"strings"
"github.com/fatedier/frp/models/config"
"github.com/fatedier/frp/server/metrics"
frpNet "github.com/fatedier/frp/utils/net"
"github.com/fatedier/frp/utils/util"
"github.com/fatedier/frp/utils/vhost"
frpIo "github.com/fatedier/golib/io"
)
type HTTPProxy struct {
*BaseProxy
cfg *config.HTTPProxyConf
closeFuncs []func()
}
func (pxy *HTTPProxy) Run() (remoteAddr string, err error) {
xl := pxy.xl
routeConfig := vhost.RouteConfig{
RewriteHost: pxy.cfg.HostHeaderRewrite,
Headers: pxy.cfg.Headers,
Username: pxy.cfg.HTTPUser,
Password: pxy.cfg.HTTPPwd,
CreateConnFn: pxy.GetRealConn,
}
locations := pxy.cfg.Locations
if len(locations) == 0 {
locations = []string{""}
}
defer func() {
if err != nil {
pxy.Close()
}
}()
addrs := make([]string, 0)
for _, domain := range pxy.cfg.CustomDomains {
if domain == "" {
continue
}
routeConfig.Domain = domain
for _, location := range locations {
routeConfig.Location = location
tmpDomain := routeConfig.Domain
tmpLocation := routeConfig.Location
// handle group
if pxy.cfg.Group != "" {
err = pxy.rc.HTTPGroupCtl.Register(pxy.name, pxy.cfg.Group, pxy.cfg.GroupKey, routeConfig)
if err != nil {
return
}
pxy.closeFuncs = append(pxy.closeFuncs, func() {
pxy.rc.HTTPGroupCtl.UnRegister(pxy.name, pxy.cfg.Group, tmpDomain, tmpLocation)
})
} else {
// no group
err = pxy.rc.HTTPReverseProxy.Register(routeConfig)
if err != nil {
return
}
pxy.closeFuncs = append(pxy.closeFuncs, func() {
pxy.rc.HTTPReverseProxy.UnRegister(tmpDomain, tmpLocation)
})
}
addrs = append(addrs, util.CanonicalAddr(routeConfig.Domain, int(pxy.serverCfg.VhostHTTPPort)))
xl.Info("http proxy listen for host [%s] location [%s] group [%s]", routeConfig.Domain, routeConfig.Location, pxy.cfg.Group)
}
}
if pxy.cfg.SubDomain != "" {
routeConfig.Domain = pxy.cfg.SubDomain + "." + pxy.serverCfg.SubDomainHost
for _, location := range locations {
routeConfig.Location = location
tmpDomain := routeConfig.Domain
tmpLocation := routeConfig.Location
// handle group
if pxy.cfg.Group != "" {
err = pxy.rc.HTTPGroupCtl.Register(pxy.name, pxy.cfg.Group, pxy.cfg.GroupKey, routeConfig)
if err != nil {
return
}
pxy.closeFuncs = append(pxy.closeFuncs, func() {
pxy.rc.HTTPGroupCtl.UnRegister(pxy.name, pxy.cfg.Group, tmpDomain, tmpLocation)
})
} else {
err = pxy.rc.HTTPReverseProxy.Register(routeConfig)
if err != nil {
return
}
pxy.closeFuncs = append(pxy.closeFuncs, func() {
pxy.rc.HTTPReverseProxy.UnRegister(tmpDomain, tmpLocation)
})
}
addrs = append(addrs, util.CanonicalAddr(tmpDomain, pxy.serverCfg.VhostHTTPPort))
xl.Info("http proxy listen for host [%s] location [%s] group [%s]", routeConfig.Domain, routeConfig.Location, pxy.cfg.Group)
}
}
remoteAddr = strings.Join(addrs, ",")
return
}
func (pxy *HTTPProxy) GetConf() config.ProxyConf {
return pxy.cfg
}
func (pxy *HTTPProxy) GetRealConn(remoteAddr string) (workConn net.Conn, err error) {
xl := pxy.xl
rAddr, errRet := net.ResolveTCPAddr("tcp", remoteAddr)
if errRet != nil {
xl.Warn("resolve TCP addr [%s] error: %v", remoteAddr, errRet)
// we do not return error here since remoteAddr is not necessary for proxies without proxy protocol enabled
}
tmpConn, errRet := pxy.GetWorkConnFromPool(rAddr, nil)
if errRet != nil {
err = errRet
return
}
var rwc io.ReadWriteCloser = tmpConn
if pxy.cfg.UseEncryption {
rwc, err = frpIo.WithEncryption(rwc, []byte(pxy.serverCfg.Token))
if err != nil {
xl.Error("create encryption stream error: %v", err)
return
}
}
if pxy.cfg.UseCompression {
rwc = frpIo.WithCompression(rwc)
}
workConn = frpNet.WrapReadWriteCloserToConn(rwc, tmpConn)
workConn = frpNet.WrapStatsConn(workConn, pxy.updateStatsAfterClosedConn)
metrics.Server.OpenConnection(pxy.GetName(), pxy.GetConf().GetBaseInfo().ProxyType)
return
}
func (pxy *HTTPProxy) updateStatsAfterClosedConn(totalRead, totalWrite int64) {
name := pxy.GetName()
proxyType := pxy.GetConf().GetBaseInfo().ProxyType
metrics.Server.CloseConnection(name, proxyType)
metrics.Server.AddTrafficIn(name, proxyType, totalWrite)
metrics.Server.AddTrafficOut(name, proxyType, totalRead)
}
func (pxy *HTTPProxy) Close() {
pxy.BaseProxy.Close()
for _, closeFn := range pxy.closeFuncs {
closeFn()
}
}